/* Tutorly.sg Style Layout */
:root {
    --tutorly-purple: #6B46C1;
    --tutorly-purple-dark: #5B21B6;
    --tutorly-purple-light: #A78BFA;
    --tutorly-bg: #F9FAFB;
    --tutorly-white: #FFFFFF;
    --tutorly-text: #1F2937;
    --tutorly-text-light: #6B7280;
    --tutorly-border: #E5E7EB;
    --sidebar-card-bg: #E6F0FF;
    --sidebar-card-border: #D1E0FF;
    --sidebar-active-tint: rgba(107, 70, 193, 0.06);
    --sidebar-accent-bar: #6B46C1;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--tutorly-bg);
    color: var(--tutorly-text);
}

/* Header */
.tutorly-header {
    background: var(--tutorly-white);
    border-bottom: 1px solid var(--tutorly-border);
    padding: 12px 20px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 100%;
}

.logo-link {
    text-decoration: none;
    color: var(--tutorly-purple-dark);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--tutorly-purple-dark);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-upgrade {
    background: var(--tutorly-purple);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.btn-upgrade:hover {
    background: var(--tutorly-purple-dark);
    color: white;
}

.btn-login, .btn-register {
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
}

.btn-login {
    color: var(--tutorly-purple);
}

.btn-register {
    background: var(--tutorly-purple);
    color: white;
}

.btn-contact {
    color: var(--tutorly-purple);
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s, background 0.2s;
}

.btn-contact:hover {
    color: var(--tutorly-purple-dark);
    background: rgba(167, 139, 250, 0.15);
}

.btn-contact--icon {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Study Planner – non-clickable, coming soon */
.btn-contact--coming-soon {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: default;
    pointer-events: none;
    opacity: 0.95;
}
.btn-contact--coming-soon:hover {
    background: transparent;
    color: var(--tutorly-purple);
}
.btn-contact-coming-soon-icon {
    display: inline-flex;
    align-items: center;
    font-size: 1rem;
    animation: study-planner-coming-soon-glow 2s ease-in-out infinite;
    filter: drop-shadow(0 0 6px rgba(251, 191, 36, 0.8));
}
@keyframes study-planner-coming-soon-glow {
    0%, 100% { opacity: 1; filter: drop-shadow(0 0 6px rgba(251, 191, 36, 0.8)) drop-shadow(0 0 12px rgba(245, 158, 11, 0.5)); transform: scale(1); }
    50% { opacity: 0.9; filter: drop-shadow(0 0 10px rgba(251, 191, 36, 1)) drop-shadow(0 0 20px rgba(245, 158, 11, 0.7)); transform: scale(1.08); }
}
.btn-contact-coming-soon-badge {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 2px 6px;
    border-radius: 4px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.35) 0%, rgba(245, 158, 11, 0.4) 100%);
    color: #b45309;
    box-shadow: 0 0 12px rgba(251, 191, 36, 0.4);
    animation: study-planner-badge-glow 2.2s ease-in-out infinite;
    margin-left: 2px;
}
@keyframes study-planner-badge-glow {
    0%, 100% { box-shadow: 0 0 12px rgba(251, 191, 36, 0.4); opacity: 1; }
    50% { box-shadow: 0 0 18px rgba(251, 191, 36, 0.7), 0 0 8px rgba(245, 158, 11, 0.3); opacity: 0.98; }
}

.btn-contact-icon {
    flex-shrink: 0;
}

.user-menu {
    position: relative;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--tutorly-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid var(--tutorly-border);
    font-size: 1.2rem;
}

.user-dropdown {
    display: none;
    position: absolute;
    top: 45px;
    right: 0;
    background: var(--tutorly-white);
    border: 1px solid var(--tutorly-border);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    z-index: 1001;
    padding: 12px;
}

.user-info {
    padding: 8px;
}

.user-dropdown .dropdown-item {
    width: 100%;
    padding: 8px 12px;
    border: none;
    background: transparent;
    text-align: left;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.2s;
}

.user-dropdown .dropdown-item:hover {
    background: var(--tutorly-bg);
}

/* Body Layout */
.tutorly-body {
    display: flex;
    min-height: calc(100vh - 60px);
}

/* Full-width main when left nav is hidden (e.g. email verification) */
.tutorly-body--no-sidebar .tutorly-main {
    width: 100%;
    max-width: 100%;
    flex: 1;
    min-width: 0;
}

/* ========== Sidebar – Card-style accordion ========== */
.tutorly-sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--tutorly-white);
    border-right: 1px solid var(--tutorly-border);
    display: flex;
    flex-direction: column;
    /* Scroll only inside .sidebar-content (+ subject strip) — avoids double scrollbars on the aside */
    overflow: hidden;
    position: sticky;
    top: 60px;
    height: calc(100vh - 60px);
}

.sidebar-content {
    flex: 1;
    min-height: 0; /* lets flex child shrink so overflow-y scroll works */
    padding: 16px 12px;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: 14px;
    -webkit-overflow-scrolling: touch;
}

/* Primary level card container */
.level-section {
    border-radius: 18px;
    background: var(--sidebar-card-bg);
    border: 1px solid var(--sidebar-card-border);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.level-section:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.level-header {
    min-height: 48px;
    padding: 14px 18px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1rem;
    color: var(--tutorly-text);
    transition: background 0.2s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    outline: none;
}

.level-header:hover {
    background: rgba(255, 255, 255, 0.6);
}

.level-header:focus-visible {
    box-shadow: inset 0 0 0 2px var(--tutorly-purple-light);
}

.level-header.expanded {
    background: rgba(255, 255, 255, 0.5);
}

.level-name {
    flex: 1;
}

.chevron {
    font-size: 1.25rem;
    line-height: 1;
    color: var(--tutorly-text-light);
    transition: transform 0.25s ease;
    display: inline-block;
}

.chevron.rotated {
    transform: rotate(90deg);
}

/* Expandable subjects list with height + opacity animation */
.subjects-list {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    transition: grid-template-rows 0.28s ease, opacity 0.22s ease;
    background: var(--tutorly-white);
    border-top: 1px solid var(--tutorly-border);
}

.subjects-list-inner {
    min-height: 0;
    overflow: hidden;
}

/* Inner scrollport for subject links — all viewports (desktop was missing; last subject clipped) */
.tutorly-subjects-scroll {
    min-height: 0;
}

/* Sidebar accordion: do not shrink or clip expanded subjects (Science etc.) */
.tutorly-sidebar .sidebar-content > .level-section {
    flex-shrink: 0;
}

.tutorly-sidebar .level-section {
    overflow: visible;
}

.tutorly-sidebar .subjects-list.show .subjects-list-inner {
    overflow: visible;
}

.tutorly-sidebar .tutorly-subjects-scroll {
    max-height: 12rem;
    max-height: min(12rem, 36dvh);
    overflow-y: scroll;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    overscroll-behavior-y: contain;
    padding-bottom: 6px;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.35) rgba(0, 0, 0, 0.06);
    transform: translateZ(0);
}

.tutorly-sidebar .tutorly-subjects-scroll::-webkit-scrollbar {
    width: 8px;
}

.tutorly-sidebar .tutorly-subjects-scroll::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.28);
    border-radius: 5px;
}

.tutorly-sidebar .tutorly-subjects-scroll::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 5px;
}

.subjects-list.show {
    grid-template-rows: 1fr;
    opacity: 1;
}

/* Avoid clipping the last subject row on mobile WebKit after expand */
.subjects-list.show .subjects-list-inner {
    overflow: visible;
}

.subjects-list-inner .subject-item:first-child {
    margin-top: 6px;
}

.subjects-list-inner .subject-item:last-child {
    margin-bottom: 6px;
}

.subject-item {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 14px 18px 14px 20px;
    margin: 0 8px 4px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--tutorly-text);
    font-size: 0.9375rem;
    font-weight: 400;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    border-left: 4px solid transparent;
    -webkit-tap-highlight-color: transparent;
}

.subject-item:hover {
    background: var(--tutorly-bg);
    color: var(--tutorly-text);
}

.subject-item--coming-soon {
    cursor: not-allowed;
    color: #b91c1c;
    border-left-color: transparent;
    opacity: 0.85;
    position: relative;
}

.subject-item--coming-soon:hover,
.subject-item--coming-soon:focus-visible {
    background: #fee2e2;
    color: #b91c1c;
    border-left-color: #dc2626;
    outline: none;
}

.subject-coming-soon-message {
    color: #dc2626;
    font-size: 0.75rem;
    font-weight: 700;
    margin-left: auto;
    opacity: 0;
    transform: translateX(4px);
    transition: opacity 0.18s ease, transform 0.18s ease;
    white-space: nowrap;
}

.subject-item--coming-soon:hover .subject-coming-soon-message,
.subject-item--coming-soon:focus-visible .subject-coming-soon-message {
    opacity: 1;
    transform: translateX(0);
}

.math-assessment-float {
    position: fixed;
    right: 24px;
    bottom: 86px;
    z-index: 1040;
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 13px 18px;
    border-radius: 999px;
    background: linear-gradient(135deg, #075985, #2563eb);
    color: #fff;
    text-decoration: none;
    font-weight: 800;
    font-size: 0.95rem;
    box-shadow: 0 16px 34px rgba(37, 99, 235, 0.32);
    border: 1px solid rgba(255, 255, 255, 0.35);
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.math-assessment-float:hover,
.math-assessment-float:focus-visible {
    color: #fff;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 20px 42px rgba(37, 99, 235, 0.42);
    background: linear-gradient(135deg, #0369a1, #1d4ed8);
    outline: none;
}

.math-assessment-float__dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: #22c55e;
    box-shadow: 0 0 0 5px rgba(34, 197, 94, 0.18);
    flex: 0 0 auto;
}

@media (max-width: 576px) {
    .math-assessment-float {
        right: 14px;
        bottom: 76px;
        padding: 11px 14px;
        font-size: 0.86rem;
    }
}

.subject-item.active {
    background: var(--sidebar-active-tint);
    border-left-color: var(--sidebar-accent-bar);
    color: var(--tutorly-purple-dark);
    font-weight: 600;
}

.subject-icon {
    width: 22px;
    height: 22px;
    font-size: 1.2rem;
    line-height: 1;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.subject-name {
    flex: 1;
}

.subject-item-empty {
    font-style: italic;
    color: var(--tutorly-text-light);
    pointer-events: none;
    margin: 0 8px 10px;
    padding: 12px 18px 12px 20px;
}

.sidebar-footer {
    padding: 20px 16px;
    border-top: 1px solid var(--tutorly-border);
    text-align: center;
    flex-shrink: 0;
}

/* Inside .sidebar-content: closes mobile drawer only (hidden md+ via Bootstrap d-md-none on wrap) */
.tutorly-sidebar-hide-menu-wrap {
    flex-shrink: 0;
    margin-bottom: 12px;
}

.tutorly-sidebar-hide-menu {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid var(--tutorly-border);
    background: var(--tutorly-white);
    color: var(--tutorly-purple);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.tutorly-sidebar-hide-menu:active {
    background: var(--tutorly-bg);
}

.copyright {
    font-size: 0.75rem;
    color: var(--tutorly-text-light);
    margin: 0;
}

/* Main Content */
.tutorly-main {
    flex: 1;
    background: var(--tutorly-bg);
    overflow-y: auto;
}

.tutorly-container {
    max-width: 100%;
    margin: 0 auto;
    overflow-x: hidden;
}

.main-tutorly-content {
    padding: 30px 40px;
    max-width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
}

/* Contact Us page */
.contact-page {
    padding: 24px 24px 48px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-hero {
    text-align: center;
    margin-bottom: 36px;
    padding: 32px 20px;
}

.contact-hero-icon {
    font-size: 3.5rem;
    margin-bottom: 12px;
    opacity: 0.9;
}

.contact-hero-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--tutorly-purple-dark);
    margin-bottom: 8px;
}

.contact-hero-tagline {
    font-size: 1.15rem;
    color: var(--tutorly-text-light);
    margin: 0;
}

.contact-content-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 28px;
    align-items: start;
}

.contact-info-card {
    background: linear-gradient(135deg, #F5F3FF 0%, #EDE9FE 100%);
    border-radius: 16px;
    padding: 28px;
    border-left: 4px solid var(--tutorly-purple);
    box-shadow: 0 4px 20px rgba(107, 70, 193, 0.12);
}

.contact-info-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.contact-info-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--tutorly-purple-dark);
    margin-bottom: 12px;
}

.contact-info-card > p {
    color: var(--tutorly-text);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.contact-info-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--tutorly-text);
}

.contact-info-badge {
    font-size: 1.1rem;
}

.contact-info-item a {
    color: var(--tutorly-purple);
    text-decoration: none;
    font-weight: 500;
}

.contact-info-item a:hover {
    text-decoration: underline;
}

.contact-form-card {
    background: linear-gradient(135deg, #FFFFFF 0%, #FAFAFA 100%);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--tutorly-border);
    box-shadow: 0 10px 40px rgba(107, 70, 193, 0.12);
    border-left: 4px solid var(--tutorly-purple);
}

/* Email verification (matches Contact / tutorly typography & colors) */
.verify-email-page {
    max-width: 640px;
}

.verify-email-card-wrap {
    max-width: 560px;
    margin: 0 auto;
}

.verify-email-card .verify-email-lead {
    font-size: 1rem;
    line-height: 1.65;
    color: var(--tutorly-text);
    margin-bottom: 1.25rem;
}

.verify-email-address {
    color: var(--tutorly-purple-dark);
    word-break: break-word;
}

.verify-email-hint {
    font-size: 0.9rem;
    color: var(--tutorly-text-light);
    margin-bottom: 1.5rem;
}

.verify-email-btn-primary {
    font-weight: 600;
    border-radius: 12px;
    padding: 0.65rem 1.25rem;
    background: linear-gradient(135deg, var(--tutorly-purple) 0%, var(--tutorly-purple-dark) 100%);
    border: none;
    box-shadow: 0 4px 14px rgba(107, 70, 193, 0.35);
}

.verify-email-btn-primary:hover {
    filter: brightness(1.05);
    box-shadow: 0 6px 18px rgba(107, 70, 193, 0.4);
}

.verify-email-btn-logout {
    font-size: 0.95rem;
    text-decoration: none;
}

.verify-email-btn-logout:hover {
    text-decoration: underline;
}

.contact-intro {
    color: var(--tutorly-text-light);
    margin-bottom: 24px;
    font-size: 1rem;
}

.contact-field {
    margin-bottom: 20px;
}

.contact-field .form-label {
    font-weight: 600;
    color: var(--tutorly-text);
    margin-bottom: 8px;
}

.contact-field .field-icon {
    margin-right: 6px;
    opacity: 0.85;
}

.contact-form .form-control,
.contact-form .form-select {
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 1rem;
    border: 1px solid var(--tutorly-border);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form .form-control:focus,
.contact-form .form-select:focus {
    border-color: var(--tutorly-purple);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.15);
    outline: none;
}

.contact-form .form-select {
    cursor: pointer;
    background-color: #fff;
}

.char-counter {
    font-size: 0.8rem;
    color: var(--tutorly-text-light);
    margin-top: 6px;
    text-align: right;
}

.btn-contact-submit {
    background: linear-gradient(135deg, var(--tutorly-purple) 0%, var(--tutorly-purple-dark) 100%);
    border: none;
    border-radius: 12px;
    font-weight: 600;
    padding: 14px 28px;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-contact-submit:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--tutorly-purple-dark) 0%, #4C1D95 100%);
    border: none;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(107, 70, 193, 0.35);
}

.btn-contact-submit:disabled {
    opacity: 0.85;
    cursor: not-allowed;
}

.btn-contact-submit .btn-icon {
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .contact-content-grid {
        grid-template-columns: 1fr;
    }

    .contact-hero-title {
        font-size: 1.85rem;
    }

    .contact-form-card {
        padding: 24px;
    }
}

/* Legacy support - contact-form-wrapper if used elsewhere */
.contact-form-wrapper {
    max-width: 560px;
    background: linear-gradient(135deg, #FFFFFF 0%, #F9FAFB 100%);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--tutorly-border);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

/* Content Header */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.level-subject-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--tutorly-text);
    margin: 0;
}

/* Tabs */
.tabs-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    border-bottom: 2px solid var(--tutorly-border);
    margin-bottom: 28px;
}

.tab-button {
    padding: 12px 22px;
    border: none;
    background: transparent;
    color: var(--tutorly-text-light);
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.25s ease;
}

.tab-button:hover:not(:disabled) {
    color: var(--tutorly-purple);
    background: rgba(237, 233, 254, 0.6);
}

.tab-button.active {
    color: var(--tutorly-purple);
    border-bottom-color: var(--tutorly-purple);
    background: transparent;
    font-weight: 600;
}

.tab-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Tab Content - use !important to override Bootstrap 5 conflicts */
.tab-content {
    position: relative;
    min-height: 320px;
}

.tab-content > .tab-pane {
    display: none !important;
}

.tab-content > .tab-pane.active {
    display: block !important;
    visibility: visible !important;
    animation: tabFadeIn 0.3s ease;
}

/* Ensure topic sections, cards and download buttons are never hidden by other CSS */
.main-tutorly-content .tab-content > .tab-pane.active .popular-topics-section,
.main-tutorly-content .tab-content > .tab-pane.active .topics-section-card,
.main-tutorly-content .tab-content > .tab-pane.active .topic-card {
    visibility: visible !important;
}
.main-tutorly-content .tab-content > .tab-pane.active .topics-grid {
    display: grid !important;
    visibility: visible !important;
}
.main-tutorly-content .tab-content > .tab-pane.active .video-card,
.main-tutorly-content .tab-content > .tab-pane.active .paper-note-card,
.main-tutorly-content .tab-content > .tab-pane.active .videos-grid {
    display: block !important;
    visibility: visible !important;
}
.main-tutorly-content .tab-content > .tab-pane.active .videos-grid {
    display: grid !important;
}
.main-tutorly-content .tab-content > .tab-pane.active .paper-note-card .btn-primary,
.main-tutorly-content .tab-content > .tab-pane.active .paper-note-card .btn-secondary,
.main-tutorly-content .tab-content > .tab-pane.active .paper-note-card a.btn {
    display: inline-block !important;
    visibility: visible !important;
}

@keyframes tabFadeIn {
    from { opacity: 0.7; }
    to { opacity: 1; }
}


/* Greeting Section */
.greeting-section {
    margin-bottom: 30px;
}

.greeting-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--tutorly-text);
}

/* Chat Intro Section */
.chat-intro-section {
    background: var(--tutorly-white);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--tutorly-border);
}

.chat-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}

.chat-header-row h4 {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0;
    color: var(--tutorly-purple-dark);
}

.btn-help {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    color: #92400E;
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-help:hover {
    background: linear-gradient(135deg, #FDE68A 0%, #FCD34D 100%);
}

.chat-prompt {
    font-size: 1rem;
    color: var(--tutorly-text-light);
    margin-bottom: 24px;
}

/* Quick Start Section */
.quick-start-section {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.section-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.section-content h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.action-buttons {
    display: flex;
    gap: 12px;
}

.btn-action {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
}

.btn-learn {
    background: var(--tutorly-purple);
    color: white;
}

.btn-learn:hover {
    background: var(--tutorly-purple-dark);
}

.btn-quiz {
    background: #F3F4F6;
    color: var(--tutorly-text);
}

.btn-quiz:hover {
    background: #E5E7EB;
}

.divider-or {
    text-align: center;
    margin: 24px 0;
    color: var(--tutorly-text-light);
    font-weight: 500;
}

/* Popular Topics */
.popular-topics-section {
    display: flex;
    gap: 16px;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
    width: 100%;
}

.topic-card {
    position: relative;
    background: var(--tutorly-white);
    border: 1px solid var(--tutorly-border);
    border-radius: 8px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

.topic-card:hover {
    border-color: var(--tutorly-purple);
    box-shadow: 0 4px 6px rgba(107, 70, 193, 0.1);
    transform: translateY(-2px);
}

.topic-card h6 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--tutorly-text);
}

.topic-card p {
    font-size: 0.85rem;
    color: var(--tutorly-text-light);
    margin: 0;
    line-height: 1.4;
}

.topic-card-helper {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.topic-strand-badge {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    background: #FEE2E2;
    color: #B91C1C;
    border: 1px solid #FCA5A5;
    padding: 3px 9px;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1.2;
}

.topic-card-locked {
    opacity: 0.82;
    background: #F9FAFB;
}

.topic-card-locked:hover {
    border-color: #F59E0B;
    box-shadow: 0 4px 10px rgba(245, 158, 11, 0.14);
}

.topic-lock-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #FEF3C7;
    color: #92400E;
    font-size: 0.85rem;
}

.topic-card-locked h6 {
    padding-right: 30px;
}

.topic-lock-text {
    display: inline-block;
    margin-top: 10px;
    color: #92400E;
    font-weight: 700;
    font-size: 0.78rem;
}

/* Popular topics: View more / View less */
.topics-grid-collapsed .topic-card-item:nth-child(n+7) {
    display: none;
}

.topics-toggle-wrap {
    margin-top: 12px;
}

.topics-toggle-btn {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--tutorly-border);
    background: var(--tutorly-white);
    color: var(--tutorly-text-light);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.topics-toggle-btn:hover {
    background: var(--tutorly-bg);
    color: var(--tutorly-text);
    border-color: #D1D5DB;
}

/* Chat Interface */
.chat-interface-section {
    background: var(--tutorly-white);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--tutorly-border);
    margin-top: 24px;
}

.chat-messages-container {
    min-height: 400px;
    max-height: min(70vh, 600px);
    overflow-y: auto;
    padding: 20px;
    background: #F9FAFB;
    border-radius: 8px;
    margin-bottom: 20px;
}

.chat-messages-container::-webkit-scrollbar {
    width: 8px;
}

.chat-messages-container::-webkit-scrollbar-track {
    background: #F3F4F6;
}

.chat-messages-container::-webkit-scrollbar-thumb {
    background: #D1D5DB;
    border-radius: 4px;
}

.welcome-message {
    text-align: center;
    padding: 40px 20px;
    color: var(--tutorly-text-light);
}

.welcome-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.welcome-message h4 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--tutorly-text);
}

/* Chat Input */
.chat-input-section {
    margin-top: 20px;
    width: 100%;
    max-width: 100%;
}

.input-group-custom {
    display: flex;
    gap: 8px;
    align-items: center;
    width: 100%;
    min-width: 0;
}

.chat-input {
    flex: 1 1 0;
    min-width: 0;
    padding: 14px 18px;
    border: 2px solid var(--tutorly-border);
    border-radius: 12px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-input:focus {
    outline: none;
    border-color: var(--tutorly-purple);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.15);
}

.chat-input:disabled {
    background: #F3F4F6;
    cursor: not-allowed;
}

/* Video Q&A input – same professional look as chat */
.video-qa-input-section .input-group-custom {
    display: flex;
    gap: 8px;
    align-items: center;
    width: 100%;
    min-width: 0;
}
.video-qa-input-section .chat-input {
    flex: 1 1 0;
    min-width: 0;
    padding: 14px 18px;
    border: 2px solid var(--tutorly-border);
    border-radius: 12px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.video-qa-input-section .chat-input:focus {
    outline: none;
    border-color: var(--tutorly-purple);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.15);
}
.video-qa-input-section .video-qa-send-btn {
    flex-shrink: 0;
}

/* Quiz descriptive answer – same professional look as chat input */
.quiz-answer-input {
    width: 100%;
    min-height: 120px;
    padding: 14px 18px;
    border: 2px solid var(--tutorly-border);
    border-radius: 12px;
    font-size: 1rem;
    line-height: 1.5;
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.quiz-answer-input::placeholder {
    color: var(--tutorly-text-light);
}
.quiz-answer-input:focus {
    outline: none;
    border-color: var(--tutorly-purple);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.15);
}

.btn-upload, .btn-ask, .btn-voice {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s;
    flex-shrink: 0;
}

.btn-voice {
    background: #F3F4F6;
    color: var(--tutorly-text);
}

.btn-voice:hover:not(:disabled) {
    background: #E5E7EB;
}

.btn-voice.recording {
    background: #EF4444;
    color: white;
    animation: pulse-recording 1.5s ease-in-out infinite;
}

.btn-voice:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@keyframes pulse-recording {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }
}

.btn-upload {
    background: #F3F4F6;
    color: var(--tutorly-text);
}

.btn-upload:hover {
    background: #E5E7EB;
}

.btn-ask {
    background: linear-gradient(135deg, var(--tutorly-purple) 0%, var(--tutorly-purple-dark) 100%);
    color: white;
}

.btn-ask:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--tutorly-purple-dark) 0%, #4C1D95 100%);
}

.btn-ask:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Tablet-specific: prevent Ask button overflow (e.g. 820px/912px widths) */
@media (min-width: 769px) and (max-width: 920px) {
    .chat-input-section .input-group-custom {
        flex-wrap: wrap;
    }

    .chat-input-section .chat-input {
        flex: 1 1 100%;
    }

    .chat-input-section .btn-ask {
        flex: 1 1 100%;
        justify-content: center;
    }
}

@media (min-width: 769px) and (max-width: 840px) {
    .chat-input-section .btn-voice,
    .chat-input-section .btn-upload,
    .chat-input-section .btn-ask {
        padding: 10px 12px;
    }
}

.status-message {
    margin-top: 12px;
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 0.9rem;
    display: none;
}

.status-message.show {
    display: block;
}

.status-message.success {
    background: #D1FAE5;
    color: #065F46;
}

.status-message.error {
    background: #FEE2E2;
    color: #991B1B;
}

/* Tab Placeholder & Empty States */
.tab-placeholder {
    text-align: center;
    padding: 60px 20px;
    color: var(--tutorly-text-light);
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.tab-placeholder h4 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--tutorly-text);
}

.section-empty-state {
    background: linear-gradient(180deg, #FAFAFA 0%, #F5F3FF 100%);
    border-radius: 18px;
    padding: 52px 32px;
    border: 2px dashed #C4B5FD;
}

.section-empty-state .placeholder-icon {
    opacity: 0.9;
}

.no-videos-message.section-empty-state {
    margin-top: 0;
}

.section-empty-state h5 {
    color: var(--tutorly-purple-dark);
    font-weight: 600;
    margin-bottom: 8px;
}

/* Chat Tab UI Improvements */
.chat-tab-hero {
    padding: 28px 0;
    margin-bottom: 12px;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.08) 0%, rgba(139, 92, 246, 0.04) 100%);
    border-radius: 20px;
    padding: 32px 28px;
}

.chat-tab-hero h3 {
    font-size: 1.85rem;
    color: var(--tutorly-purple-dark);
    margin-bottom: 10px;
    font-weight: 700;
}

.greeting-subtitle {
    font-size: 1.05rem;
    color: var(--tutorly-text-light);
    margin: 0;
}

.chat-intro-card {
    background: linear-gradient(135deg, #FFFFFF 0%, #F9FAFB 100%);
    border-radius: 18px;
    padding: 28px 30px;
    border: 1px solid rgba(139, 92, 246, 0.15);
    box-shadow: 0 4px 20px rgba(107, 70, 193, 0.08);
}

.topics-section-card {
    padding: 24px 28px;
    background: linear-gradient(180deg, #FFFFFF 0%, #FAFAFF 100%);
    border-radius: 14px;
    border: 1px solid var(--tutorly-border);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}

.topics-section-card .section-content h5 {
    color: var(--tutorly-purple-dark);
    font-size: 1.1rem;
}

.topic-card {
    background: linear-gradient(135deg, #FFFFFF 0%, #F9FAFB 100%);
    border: 1px solid #E5E7EB;
    border-radius: 12px;
    padding: 18px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.topic-card:hover {
    border-color: var(--tutorly-purple);
    box-shadow: 0 4px 16px rgba(107, 70, 193, 0.12);
    transform: translateY(-2px);
}

.chat-box-card {
    background: var(--tutorly-white);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--tutorly-border);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    margin-top: 24px;
}

.chat-messages-container {
    background: linear-gradient(180deg, #FAFAFA 0%, #F5F3FF 100%);
    border-radius: 12px;
}

.welcome-message {
    padding: 48px 24px;
}

.welcome-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
}

/* Quiz Tab UI Improvements */
.quiz-topics-section {
    width: 100%;
    align-items: flex-start;
}

.quiz-topics-section .section-content {
    flex: 1;
    min-width: 0;
}

.quiz-topics-section .section-content h5 {
    color: var(--tutorly-purple-dark);
    font-size: 1.15rem;
}

/* Quiz topics: four cards per row on desktop (full width of content area) */
.topics-grid.quiz-topic-cards-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 1200px) {
    .topics-grid.quiz-topic-cards-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 992px) {
    .topics-grid.quiz-topic-cards-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Quiz topic cards: Free vs Premium */
.quiz-topic-cards-grid .quiz-topic-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: relative;
    padding-right: 2.5rem;
}

.quiz-topic-card .quiz-topic-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
}

.quiz-topic-badge-free {
    background: #D1FAE5;
    color: #065F46;
}

.quiz-topic-badge-premium {
    background: #FED7AA;
    color: #9A3412;
}

.quiz-topic-card .quiz-topic-arrow {
    position: absolute;
    right: 12px;
    bottom: 16px;
    font-size: 1rem;
    color: var(--tutorly-purple);
    font-weight: 600;
}

.quiz-topic-card-premium {
    cursor: default;
    opacity: 0.95;
}

.quiz-topic-card-premium:hover {
    border-color: var(--tutorly-border);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
    transform: none;
}

.quiz-topic-upgrade-text {
    color: var(--tutorly-text-light);
    font-size: 0.8rem;
}

.quiz-topic-upgrade-btn {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--tutorly-purple);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.quiz-topic-upgrade-btn:hover {
    color: var(--tutorly-purple-dark);
    text-decoration: underline;
}

.quiz-empty-state {
    max-width: 480px;
    margin: 0 auto;
    background: linear-gradient(180deg, #FAFAFA 0%, #F5F3FF 100%);
    border-radius: 20px;
    border: 2px dashed #C4B5FD;
}

.quiz-back-btn {
    border-radius: 999px;
    border-color: rgba(100, 116, 139, 0.28);
    background: #ffffff;
    color: #475569;
    font-weight: 700;
    padding: 7px 12px;
}

.quiz-card-styled {
    border: 0;
    box-shadow: 0 14px 30px rgba(91, 33, 182, 0.11);
}

.quiz-notebook-shell {
    position: relative;
    border-radius: 24px;
    padding: 10px 10px 10px 38px;
    background:
        radial-gradient(circle at 20px 18px, rgba(107, 70, 193, 0.08) 0 2px, transparent 3px),
        linear-gradient(135deg, #f5f3ff 0%, #e6f0ff 100%);
    background-size: 72px 72px, auto;
    border: 7px solid #c4b5fd;
    overflow: hidden;
    isolation: isolate;
}

.quiz-notebook-shell::before {
    content: "+  -  x  %  =  sqrt";
    position: absolute;
    inset: 0;
    color: rgba(107, 70, 193, 0.06);
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: 0.28em;
    line-height: 2.1;
    transform: rotate(-7deg) scale(1.1);
    pointer-events: none;
    z-index: -1;
}

.quiz-notebook-rings {
    position: absolute;
    top: 36px;
    bottom: 36px;
    left: 14px;
    width: 14px;
    background:
        repeating-linear-gradient(
            to bottom,
            transparent 0 26px,
            #ffffff 26px 34px,
            transparent 34px 54px
        );
}

.quiz-notebook-rings::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            to bottom,
            transparent 0 26px,
            rgba(107, 70, 193, 0.38) 26px 34px,
            transparent 34px 54px
        );
    transform: translateX(6px);
    border-radius: 999px;
    opacity: 0.75;
}

.quiz-notebook-page {
    position: relative;
    border-radius: 16px;
    background: #f8f7ff;
    box-shadow:
        8px 0 0 rgba(255, 255, 255, 0.62),
        15px 0 0 rgba(255, 255, 255, 0.3),
        inset 0 0 0 1px rgba(107, 70, 193, 0.1);
    overflow: hidden;
}

.quiz-card-styled .card-header {
    background: transparent;
    color: white;
    border: none;
    font-weight: 600;
}

.quiz-play-header {
    padding: 24px 30px 8px;
    background: #f8f7ff;
    color: var(--tutorly-text);
}

.quiz-header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.quiz-question-counter {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    color: var(--tutorly-purple-dark);
    font-size: clamp(1.55rem, 3.2vw, 2.25rem);
    font-weight: 800;
    line-height: 1;
    text-shadow: 0 4px 0 rgba(255, 255, 255, 0.95), 0 5px 8px rgba(91, 33, 182, 0.1);
}

.quiz-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.quiz-topic-pill {
    display: inline-block;
    max-width: min(38vw, 340px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    border-radius: 999px;
    background: rgba(107, 70, 193, 0.12);
    color: var(--tutorly-purple-dark);
    border: 1px solid rgba(107, 70, 193, 0.16);
    padding: 8px 12px;
    font-weight: 700;
}

.quiz-admin-soft {
    border-radius: 999px;
    color: var(--tutorly-purple-dark);
}

.quiz-progress-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    justify-content: flex-end;
    gap: 10px;
    width: 100%;
    margin-top: 12px;
}

.quiz-progress-strip--empty {
    justify-content: flex-end;
}

.quiz-progress-hint {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--tutorly-text-light);
    text-align: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.8);
    line-height: 1.35;
}

.quiz-progress-stat {
    flex: 1 1 0;
    min-width: 0;
    max-width: 140px;
    text-align: center;
    padding: 8px 10px;
    border-radius: 14px;
    background: #ffffff;
    border: 2px solid rgba(107, 70, 193, 0.12);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.quiz-progress-stat--ok {
    background: #ecfdf5;
    border-color: rgba(34, 197, 94, 0.28);
}

.quiz-progress-stat--bad {
    background: #fef2f2;
    border-color: rgba(248, 113, 113, 0.28);
}

.quiz-progress-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #64748b;
    margin-bottom: 4px;
    line-height: 1.2;
}

.quiz-progress-value {
    display: block;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--tutorly-purple-dark);
    line-height: 1.15;
    font-variant-numeric: tabular-nums;
}

@media (max-width: 576px) {
    .quiz-card-header-stacked {
        padding-left: 14px;
        padding-right: 14px;
        padding-bottom: 14px;
    }

    .quiz-progress-strip {
        gap: 6px;
    }

    .quiz-progress-stat {
        flex: 1 1 calc(33.333% - 6px);
        min-width: calc(33.333% - 6px);
        max-width: none;
        padding: 8px 6px;
    }

    .quiz-progress-label {
        font-size: 0.625rem;
    }

    .quiz-progress-value {
        font-size: 1.2rem;
    }

    .quiz-progress-hint {
        font-size: 0.75rem;
    }
}

@media (max-width: 380px) {
    .quiz-progress-stat {
        padding: 6px 4px;
    }

    .quiz-progress-value {
        font-size: 1.1rem;
    }
}

.quiz-play-body {
    padding: 0 30px 28px;
}

.quiz-section-title {
    color: var(--tutorly-purple-dark);
    font-weight: 800;
    margin-bottom: 14px;
}

.quiz-worksheet,
.quiz-answer-panel {
    background: #ffffff;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.quiz-worksheet {
    padding: 24px 28px;
    margin-top: 8px;
    margin-bottom: 14px;
}

.quiz-answer-panel {
    padding: 22px 24px;
}

.quiz-answer-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.quiz-question-preview {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    align-items: center;
}

.quiz-question-preview--with-image {
    grid-template-columns: minmax(280px, 0.85fr) minmax(340px, 0.95fr);
}

.quiz-question-preview .lead {
    font-size: clamp(1.15rem, 1.65vw, 1.45rem);
    line-height: 1.42;
    color: #0f172a;
}

.quiz-question-image-wrap {
    border: 2px dashed rgba(167, 139, 250, 0.55);
    border-radius: 16px;
    overflow: hidden;
    background: #fbfaff;
    padding: 12px;
    width: 100%;
    max-width: 520px;
    justify-self: end;
}

.quiz-question-image-wrap img,
.quiz-admin-current-image img {
    display: block;
    width: 100%;
    max-height: 320px;
    height: auto;
    object-fit: contain;
}

.quiz-answer-options {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.quiz-answer-tile {
    position: relative;
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    min-height: 64px;
    margin: 0;
    padding: 12px 14px;
    border-radius: 16px;
    border: 2px solid #dbeafe;
    background: #f8fbff;
    color: #1f2937;
    cursor: pointer;
    transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.quiz-answer-tile:hover {
    transform: translateY(-2px);
    border-color: var(--tutorly-purple-light);
    box-shadow: 0 8px 18px rgba(107, 70, 193, 0.13);
}

.quiz-answer-tile:focus-within,
.quiz-answer-tile:has(input:focus-visible) {
    outline: 3px solid rgba(167, 139, 250, 0.55);
    outline-offset: 3px;
}

.quiz-answer-tile.is-selected {
    border-color: var(--tutorly-purple);
    background: linear-gradient(180deg, #f5f3ff 0%, #ede9fe 100%);
    box-shadow: 0 0 0 4px rgba(167, 139, 250, 0.2), 0 10px 20px rgba(107, 70, 193, 0.14);
}

.quiz-answer-tile input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.quiz-answer-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 999px;
    background: var(--tutorly-purple);
    color: #ffffff;
    font-weight: 800;
    box-shadow: inset 0 -3px 0 rgba(15, 23, 42, 0.12);
}

.quiz-answer-tile:nth-child(1) {
    border-color: #bfdbfe;
    background: #f8fbff;
}

.quiz-answer-tile:nth-child(1) .quiz-answer-letter {
    background: #3b82f6;
}

.quiz-answer-tile:nth-child(2) {
    border-color: #ddd6fe;
    background: #fbfaff;
}

.quiz-answer-tile:nth-child(2) .quiz-answer-letter {
    background: var(--tutorly-purple);
}

.quiz-answer-tile:nth-child(3) {
    border-color: #bbf7d0;
    background: #f7fef9;
}

.quiz-answer-tile:nth-child(3) .quiz-answer-letter {
    background: #22c55e;
}

.quiz-answer-tile:nth-child(4) {
    border-color: #fed7aa;
    background: #fffaf5;
}

.quiz-answer-tile:nth-child(4) .quiz-answer-letter {
    background: #f97316;
}

.quiz-answer-tile.is-selected .quiz-answer-letter {
    background: var(--tutorly-purple-dark);
}

.quiz-answer-text {
    min-width: 0;
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.35;
    overflow-wrap: anywhere;
}

.quiz-hint-btn {
    border-radius: 999px;
    border: 2px solid rgba(167, 139, 250, 0.45);
    background: #f5f3ff;
    color: var(--tutorly-purple-dark);
    font-weight: 800;
}

.quiz-hint-btn:hover,
.quiz-hint-btn:focus {
    background: #ede9fe;
    color: var(--tutorly-purple-dark);
    border-color: var(--tutorly-purple-light);
}

.quiz-hint-card {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 14px;
    background: #f5f3ff;
    border: 2px dashed #c4b5fd;
    color: var(--tutorly-purple-dark);
    font-weight: 700;
}

.quiz-submit-btn,
.quiz-next-btn {
    border: 0;
    border-radius: 16px;
    background: var(--tutorly-purple);
    color: #ffffff;
    font-weight: 800;
    padding: 11px 18px;
    box-shadow: 0 6px 0 var(--tutorly-purple-dark), 0 10px 16px rgba(107, 70, 193, 0.16);
}

.quiz-submit-btn {
    min-width: 168px;
}

.quiz-submit-btn:hover,
.quiz-next-btn:hover,
.quiz-submit-btn:focus,
.quiz-next-btn:focus {
    background: var(--tutorly-purple-dark);
    color: #ffffff;
    transform: translateY(-1px);
}

.quiz-submit-btn:disabled,
.quiz-next-btn:disabled,
.quiz-nav-btn:disabled,
.quiz-hint-btn:disabled {
    opacity: 0.55;
    transform: none;
    box-shadow: none;
}

.quiz-feedback-card {
    margin-top: 18px;
    margin-bottom: 0;
    border-radius: 16px;
    border-width: 2px;
    font-weight: 600;
}

.quiz-feedback-card.alert-success {
    background: #ecfdf5;
    border-color: #22c55e;
    color: #14532d;
}

.quiz-feedback-card.alert-danger {
    background: #fef2f2;
    border-color: #fca5a5;
    color: #7f1d1d;
}

.quiz-footer-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 2px dashed rgba(148, 163, 184, 0.35);
}

.quiz-nav-btn {
    border-radius: 14px;
    border: 2px solid #cbd5e1;
    background: #ffffff;
    color: #64748b;
    font-weight: 800;
    padding: 10px 18px;
}

.quiz-nav-btn:hover,
.quiz-nav-btn:focus {
    border-color: #94a3b8;
    background: #f8fafc;
}

.quiz-page-count {
    min-width: 72px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 800;
    color: #475569;
    font-variant-numeric: tabular-nums;
}

.quiz-footer-save {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.quiz-save-btn {
    border-radius: 999px;
    border: 2px solid rgba(107, 70, 193, 0.2);
    background: #ffffff;
    color: var(--tutorly-purple-dark);
    font-weight: 800;
    padding: 8px 13px;
}

.quiz-save-btn:hover,
.quiz-save-btn:focus {
    background: #f5f3ff;
    color: var(--tutorly-purple-dark);
}

.quiz-save-status {
    color: #64748b;
    font-size: 0.8rem;
    font-weight: 700;
}

.quiz-footnote,
.quiz-notebook-shell + .text-muted.small {
    margin: 10px 0 0;
    color: #94a3b8;
    font-size: 0.78rem;
    text-align: left;
}

.quiz-embedded-card {
    width: min(100%, 1120px);
    margin: 0 auto;
}

#quizCardContainer {
    margin-top: 12px;
}

.quiz-admin-options {
    display: grid;
    gap: 10px;
}

.quiz-admin-option-row {
    display: grid;
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
}

.quiz-admin-current-image {
    max-width: 260px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 10px;
    overflow: hidden;
}

@media (max-width: 768px) {
    .quiz-notebook-shell {
        border-width: 6px;
        border-radius: 22px;
        padding: 10px;
    }

    .quiz-notebook-rings {
        display: none;
    }

    .quiz-notebook-page {
        border-radius: 14px;
        box-shadow: inset 0 0 0 1px rgba(14, 165, 233, 0.16);
    }

    .quiz-play-header,
    .quiz-play-body {
        padding-left: 16px;
        padding-right: 16px;
    }

    .quiz-play-header {
        padding-top: 20px;
    }

    .quiz-header-main,
    .quiz-progress-strip,
    .quiz-progress-strip--empty {
        justify-content: center;
    }

    .quiz-question-counter {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .quiz-topic-pill {
        max-width: 100%;
    }

    .quiz-worksheet,
    .quiz-answer-panel {
        padding: 18px;
    }

    .quiz-question-preview {
        grid-template-columns: 1fr;
    }

    .quiz-question-image-wrap {
        justify-self: stretch;
        max-width: 100%;
    }

    .quiz-question-image-wrap img {
        max-height: 260px;
    }

    .quiz-answer-options {
        grid-template-columns: 1fr;
    }

    .quiz-footer-controls {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
    }

    .quiz-footer-save {
        grid-column: 1 / -1;
        justify-content: center;
        margin-left: 0;
    }

    .quiz-nav-btn,
    .quiz-next-btn {
        padding-left: 12px;
        padding-right: 12px;
    }
}

@media (max-width: 420px) {
    .quiz-notebook-shell {
        border-width: 6px;
        padding: 6px;
    }

    .quiz-play-header,
    .quiz-play-body {
        padding-left: 12px;
        padding-right: 12px;
    }

    .quiz-answer-tile {
        grid-template-columns: 36px minmax(0, 1fr);
        padding: 10px;
    }

    .quiz-answer-letter {
        width: 36px;
        height: 36px;
    }

    .quiz-footer-controls {
        grid-template-columns: 1fr;
    }

    .quiz-page-count {
        order: -1;
        justify-self: center;
    }
}

/* Videos, Papers, Notes Tabs - Section Wrappers */
.videos-section.videos-tab-content,
.videos-section.papers-tab-content,
.videos-section.notes-tab-content {
    padding: 24px 0;
}

/* Videos Tab UI Improvements */
.videos-tab-content .videos-header-card,
.papers-header-card,
.notes-header-card {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 22px 26px;
    background: linear-gradient(135deg, #F5F3FF 0%, #EDE9FE 100%);
    border-radius: 18px;
    border-left: 5px solid var(--tutorly-purple);
    margin-bottom: 30px;
    box-shadow: 0 2px 12px rgba(107, 70, 193, 0.06);
}

.videos-header-icon {
    font-size: 2.25rem;
    line-height: 1;
}

.videos-header-card h4,
.papers-header-card h4,
.notes-header-card h4 {
    margin: 0 0 4px 0;
    color: var(--tutorly-purple-dark);
    font-size: 1.25rem;
}

.videos-header-subtitle {
    margin: 0;
    color: var(--tutorly-text-light);
    font-size: 0.95rem;
}

.papers-header-card {
    border-left-color: #667eea;
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    box-shadow: 0 2px 12px rgba(102, 126, 234, 0.08);
}

.notes-header-card {
    border-left-color: #F472B6;
    background: linear-gradient(135deg, #FDF2F8 0%, #FCE7F3 100%);
    box-shadow: 0 2px 12px rgba(244, 114, 182, 0.08);
}

.featured-videos-section {
    padding: 28px;
    background: linear-gradient(135deg, #FFF9E6 0%, #FFF3CD 100%);
    border-radius: 18px;
    border: 1px solid rgba(245, 158, 11, 0.25);
}

.featured-section-title {
    font-size: 1.2rem;
    color: var(--tutorly-purple-dark);
    margin-bottom: 20px;
    font-weight: 700;
}

/* Video cards enhancement */
.video-card {
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(229, 231, 235, 0.8);
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.video-card:hover {
    box-shadow: 0 12px 32px rgba(107, 70, 193, 0.18);
    border-color: rgba(167, 139, 250, 0.3);
}

.video-info {
    padding: 18px 20px;
}

.video-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--tutorly-text);
    line-height: 1.4;
}

.video-meta, .video-subject, .video-description {
    font-size: 0.9rem;
    color: var(--tutorly-text-light);
}

/* Paper & Note cards */
.paper-note-card {
    transition: transform 0.25s, box-shadow 0.25s;
    border: 1px solid rgba(229, 231, 235, 0.8);
}

.paper-note-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 32px rgba(107, 70, 193, 0.15);
}

.paper-note-card .btn-primary {
    background: linear-gradient(135deg, var(--tutorly-purple) 0%, var(--tutorly-purple-dark) 100%);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    padding: 10px 18px;
}

.paper-note-card .btn-primary:hover {
    background: linear-gradient(135deg, var(--tutorly-purple-dark) 0%, #4C1D95 100%);
    border: none;
}

/* Coming Soon badge - glowing effect on Past Papers & Study Notes */
.paper-note-card {
    position: relative;
}

.badge-coming-soon {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
    padding: 6px 14px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #fff;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius: 20px;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.6), 0 0 40px rgba(245, 158, 11, 0.3);
    animation: coming-soon-glow 2s ease-in-out infinite alternate;
}

.coming-soon-card .badge-coming-soon {
    box-shadow: 0 0 24px rgba(245, 158, 11, 0.7), 0 0 48px rgba(245, 158, 11, 0.35);
}

@keyframes coming-soon-glow {
    from {
        box-shadow: 0 0 16px rgba(245, 158, 11, 0.5), 0 0 32px rgba(245, 158, 11, 0.25);
    }
    to {
        box-shadow: 0 0 24px rgba(245, 158, 11, 0.75), 0 0 48px rgba(245, 158, 11, 0.4);
    }
}

/* Premium badge for Past Papers & Study Notes (subscribers only - Chatbot & Full Premium) */
.badge-premium-paper-note {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
    padding: 6px 14px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #fff;
    background: linear-gradient(135deg, var(--tutorly-purple) 0%, var(--tutorly-purple-dark) 100%);
    border-radius: 20px;
    box-shadow: 0 2px 8px rgba(107, 70, 193, 0.4);
}

/* Main tab buttons - consistent styling */
.tabs-container .tab-button:not(.tab-saved) {
    border-radius: 10px;
    padding: 10px 18px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tabs-container .tab-button:not(.tab-saved):hover:not(:disabled) {
    background: #E5E7EB;
}

.tabs-container .tab-button:not(.tab-saved).active {
    background: var(--tutorly-purple);
    color: white;
    border-color: var(--tutorly-purple);
}

/* Saved Chat & Quiz tabs - eye-catching styling */
.tab-saved {
    background: linear-gradient(135deg, #E0E7FF 0%, #F3E8FF 100%);
    border: 1px solid var(--tutorly-purple-light);
    font-weight: 600;
}

.tab-saved:hover,
.tab-saved.active {
    background: linear-gradient(135deg, var(--tutorly-purple-light) 0%, var(--tutorly-purple) 100%);
    color: white;
    border-color: var(--tutorly-purple);
}

/* Saved Responses Section */
.saved-responses-section {
    padding: 1rem 0;
}

/* Modern saved filter bar (Saved Chat / Saved Quiz) */
.saved-filter-bar-form {
    background: #f3f4f6;
    border-radius: 12px;
    border: 1px solid var(--tutorly-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    padding: 20px 24px;
    transition: box-shadow 0.2s ease;
}

.saved-filter-bar-form:hover {
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.saved-filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 20px 24px;
}

.saved-filter-bar__group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.saved-filter-bar__label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--tutorly-text-light);
}

.saved-filter-bar__label--hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.saved-filter-bar__search {
    flex: 1 1 200px;
    min-width: 180px;
}

.saved-filter-bar__input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.saved-filter-bar__icon {
    position: absolute;
    left: 12px;
    color: var(--tutorly-text-light);
    pointer-events: none;
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.saved-filter-bar__input-wrap--search .saved-filter-bar__input {
    padding-left: 40px;
}

.saved-filter-bar__input-wrap--date .saved-filter-bar__input {
    padding-left: 38px;
}

.saved-filter-bar__input {
    width: 100%;
    height: 40px;
    padding: 8px 14px;
    font-size: 0.9375rem;
    color: var(--tutorly-text);
    background: var(--tutorly-white);
    border: 1px solid var(--tutorly-border);
    border-radius: 8px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.saved-filter-bar__input::placeholder {
    color: var(--tutorly-text-light);
}

.saved-filter-bar__input:hover {
    border-color: #D1D5DB;
    background: #fafafa;
}

.saved-filter-bar__input:focus {
    outline: none;
    border-color: var(--tutorly-purple);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.12);
}

.saved-filter-bar__input-wrap:focus-within .saved-filter-bar__icon {
    color: var(--tutorly-purple);
}

.saved-filter-bar__input--date {
    min-width: 140px;
}

.saved-filter-bar__date-range {
    flex: 0 0 auto;
}

.saved-filter-bar__date-fields {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.saved-filter-bar__date-sep {
    font-size: 0.875rem;
    color: var(--tutorly-text-light);
    font-weight: 500;
}

.saved-filter-bar__actions {
    flex: 0 0 auto;
}

.saved-filter-bar__buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.saved-filter-bar__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 18px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.saved-filter-bar__btn--primary {
    background: var(--tutorly-purple);
    color: white;
    border: 1px solid var(--tutorly-purple);
    box-shadow: 0 1px 2px rgba(107, 70, 193, 0.2);
}

.saved-filter-bar__btn--primary:hover {
    background: var(--tutorly-purple-dark);
    border-color: var(--tutorly-purple-dark);
    box-shadow: 0 2px 4px rgba(107, 70, 193, 0.3);
    transform: translateY(-1px);
}

.saved-filter-bar__btn--primary:active {
    transform: translateY(0);
}

.saved-filter-bar__btn--secondary {
    background: var(--tutorly-white);
    color: var(--tutorly-text);
    border: 1px solid var(--tutorly-border);
}

.saved-filter-bar__btn--secondary:hover {
    background: #f9fafb;
    border-color: #D1D5DB;
    color: var(--tutorly-purple);
}

.saved-filter-bar__btn--secondary:active {
    background: #f3f4f6;
}

.saved-filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.saved-filter-chip {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 0.8125rem;
    color: var(--tutorly-purple-dark);
    background: rgba(107, 70, 193, 0.1);
    border: 1px solid rgba(107, 70, 193, 0.25);
    border-radius: 20px;
    font-weight: 500;
}

@media (max-width: 767.98px) {
    .saved-filter-bar-form {
        padding: 16px;
    }
    .saved-filter-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }
    .saved-filter-bar__search {
        min-width: 100%;
    }
    .saved-filter-bar__date-fields {
        flex-wrap: wrap;
    }
    .saved-filter-bar__input--date {
        min-width: 0;
        flex: 1 1 120px;
    }
    .saved-filter-bar__buttons {
        width: 100%;
        justify-content: stretch;
    }
    .saved-filter-bar__btn {
        flex: 1;
    }

    .saved-chat-list {
        gap: 12px;
    }

    .saved-chat-list .saved-card-body {
        grid-template-columns: 1fr;
        grid-template-areas:
            "header"
            "meta"
            "content"
            "actions";
        gap: 8px;
        padding: 14px;
    }

    .saved-chat-list .saved-card-actions {
        justify-content: stretch;
        width: 100%;
    }

    .saved-chat-list .saved-card-actions form {
        flex: 1 1 0;
    }

    .saved-chat-list .btn-saved-action {
        flex: 1 1 0;
        justify-content: center;
        min-width: 0;
    }

    .saved-chat-list .saved-card-content-full {
        max-height: 360px;
        padding: 12px;
    }
}

/* Recorded Lectures (folder tree page) */
.recorded-lectures-page {
    padding: 24px 0;
    max-width: 900px;
    margin: 0 auto;
}

.recorded-lectures-header {
    margin-bottom: 24px;
}

.recorded-lectures-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--tutorly-text);
    margin: 0 0 8px 0;
}

.recorded-lectures-subtitle {
    font-size: 0.9375rem;
    color: var(--tutorly-text-light);
    margin: 0;
}

/* Subscribe CTA - eye-catching glowing text (when user has no subscription) */
.recorded-lectures-cta-link {
    display: block;
    text-decoration: none;
    margin-bottom: 20px;
    padding: 16px 24px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(139, 92, 246, 0.12) 50%, rgba(236, 72, 153, 0.08) 100%);
    border: 1px solid rgba(99, 102, 241, 0.35);
    border-radius: 12px;
    box-shadow: 0 0 24px rgba(99, 102, 241, 0.2);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.recorded-lectures-cta-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 32px rgba(99, 102, 241, 0.35);
}
.recorded-lectures-cta {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    color: #6366f1;
    text-shadow: 0 0 20px rgba(99, 102, 241, 0.6), 0 0 40px rgba(139, 92, 246, 0.4);
    animation: recorded-lectures-cta-glow 2.2s ease-in-out infinite;
}
@keyframes recorded-lectures-cta-glow {
    0%, 100% { opacity: 1; text-shadow: 0 0 20px rgba(99, 102, 241, 0.6), 0 0 40px rgba(139, 92, 246, 0.4); }
    50% { opacity: 0.92; text-shadow: 0 0 28px rgba(99, 102, 241, 0.8), 0 0 56px rgba(139, 92, 246, 0.5); }
}

.recorded-lectures-tree-card {
    background: var(--tutorly-white);
    border-radius: 12px;
    border: 1px solid var(--tutorly-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.recorded-lectures-tree {
    padding: 16px 0;
}

.recorded-lectures-empty {
    padding: 24px;
    color: var(--tutorly-text-light);
    margin: 0;
}

.lecture-tree-node {
    margin: 0;
}

.lecture-tree-node__summary {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    cursor: pointer;
    list-style: none;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--tutorly-text);
    transition: background 0.2s ease;
}

.lecture-tree-node__summary::-webkit-details-marker {
    display: none;
}

.lecture-tree-node__summary::before {
    content: "";
    display: inline-block;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center;
    transition: transform 0.2s ease;
}

.lecture-tree-node[open] > .lecture-tree-node__summary::before {
    transform: rotate(90deg);
}

.lecture-tree-node__summary:hover {
    background: var(--tutorly-bg);
}

.lecture-tree-node__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.lecture-tree-node__icon--folder {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236B46C1' stroke-width='2'%3E%3Cpath d='M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z'/%3E%3C/svg%3E");
}

.lecture-tree-node__icon--video {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Crect x='2' y='2' width='20' height='20' rx='2.18' ry='2.18'/%3E%3Cline x1='7' y1='2' x2='7' y2='22'/%3E%3Cline x1='17' y1='2' x2='17' y2='22'/%3E%3Cline x1='2' y1='12' x2='22' y2='12'/%3E%3Cline x1='2' y1='7' x2='7' y2='7'/%3E%3Cline x1='2' y1='17' x2='7' y2='17'/%3E%3Cline x1='17' y1='17' x2='22' y2='17'/%3E%3Cline x1='17' y1='7' x2='22' y2='7'/%3E%3C/svg%3E");
}

.lecture-tree-node__label {
    flex: 1;
}

.lecture-tree-node__children {
    padding-left: 0;
    margin: 0;
}

.lecture-tree-node--subject .lecture-tree-node__summary {
    padding-left: 48px;
}

.lecture-tree-node--topic .lecture-tree-node__summary {
    padding-left: 72px;
}

.lecture-tree-videos {
    list-style: none;
    padding: 4px 0 4px 92px;
    margin: 0;
}

.lecture-tree-video {
    margin: 0;
}

.lecture-tree-video__link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px 8px 0;
    font-size: 0.9375rem;
    color: var(--tutorly-text);
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease;
}

.lecture-tree-video__link:hover {
    color: var(--tutorly-purple);
    background: var(--tutorly-bg);
}

.lecture-tree-video__link--locked {
    cursor: default;
    opacity: 0.85;
    pointer-events: none;
}

.lecture-tree-video__title {
    flex: 1;
}

.lecture-tree-video__badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--tutorly-bg);
    color: var(--tutorly-text-light);
}

.lecture-tree-video__badge--premium {
    background: rgba(107, 70, 193, 0.15);
    color: var(--tutorly-purple-dark);
}

.lecture-tree-video__description {
    margin: 0;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--tutorly-text-light);
}

.lecture-tree-video__description--inline {
    padding: 2px 20px 10px 30px;
}

.lecture-tree-video__details {
    margin: 0;
    padding: 2px 20px 10px 30px;
}

.lecture-tree-video__details-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 6px 10px;
    list-style: none;
    cursor: pointer;
    padding: 4px 0;
    font-size: 0.8125rem;
    color: var(--tutorly-text-light);
    transition: color 0.2s ease;
}

.lecture-tree-video__details-summary::-webkit-details-marker {
    display: none;
}

.lecture-tree-video__details-summary::before {
    content: "";
    display: inline-block;
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    margin-top: 3px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center;
    transition: transform 0.2s ease;
}

.lecture-tree-video__details[open] > .lecture-tree-video__details-summary::before {
    transform: rotate(90deg);
}

.lecture-tree-video__details-summary:hover {
    color: var(--tutorly-text);
}

.lecture-tree-video__details-preview {
    flex: 1 1 160px;
    min-width: 0;
    color: var(--tutorly-text);
    opacity: 0.92;
}

.lecture-tree-video__details-action {
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--tutorly-purple);
}

.lecture-tree-video__description--full {
    margin: 8px 0 0 0;
    padding: 10px 12px 10px 14px;
    border-left: 3px solid rgba(107, 70, 193, 0.35);
    border-radius: 0 8px 8px 0;
    background: var(--tutorly-bg);
    font-size: 0.8125rem;
    line-height: 1.55;
    color: var(--tutorly-text);
}

@media (max-width: 575.98px) {
    .recorded-lectures-page {
        padding: 16px 0;
    }
    .lecture-tree-node__summary {
        padding-left: 12px;
    }
    .lecture-tree-node--subject .lecture-tree-node__summary {
        padding-left: 28px;
    }
    .lecture-tree-node--topic .lecture-tree-node__summary {
        padding-left: 44px;
    }
    .lecture-tree-videos {
        padding-left: 56px;
    }

    .lecture-tree-video__description--inline,
    .lecture-tree-video__details {
        padding-left: 24px;
        padding-right: 12px;
    }
}

.saved-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 28px;
    padding: 20px 24px;
    background: linear-gradient(135deg, #F5F3FF 0%, #EDE9FE 100%);
    border-radius: 16px;
    border-left: 4px solid var(--tutorly-purple);
}

.saved-header-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.saved-header h4 {
    margin: 0 0 4px 0;
    color: var(--tutorly-purple-dark);
    font-size: 1.35rem;
}

.saved-subtitle {
    margin: 0;
    color: var(--tutorly-text-light);
    font-size: 0.95rem;
}

.saved-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.saved-chat-list {
    display: grid;
    gap: 10px;
}

.saved-card {
    position: relative;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid #E5E7EB;
}

.saved-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(107, 70, 193, 0.15);
}

.saved-card-chat {
    border-top: 3px solid #10B981;
}

.saved-card-quiz {
    border-top: 3px solid var(--tutorly-purple);
}

.saved-card-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 10px;
    border-radius: 20px;
    z-index: 1;
}

.saved-card-chat .saved-card-badge {
    background: #D1FAE5;
    color: #047857;
}

.saved-card-quiz .saved-card-badge {
    background: #EDE9FE;
    color: var(--tutorly-purple-dark);
}

.saved-quiz-detail {
    display: grid;
    gap: 12px;
    margin-top: 8px;
}

.saved-quiz-topic {
    font-weight: 700;
    color: #334155;
}

.saved-quiz-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.9rem;
}

.saved-quiz-summary span,
.saved-quiz-status {
    border-radius: 999px;
    padding: 4px 10px;
    background: #eef2f7;
    color: #334155;
    font-weight: 700;
}

.saved-quiz-status--correct {
    background: #dcfce7;
    color: #166534;
}

.saved-quiz-status--wrong {
    background: #fee2e2;
    color: #991b1b;
}

.saved-quiz-question {
    border: 1px solid #e2e8f0;
    border-left: 4px solid #cbd5e1;
    border-radius: 8px;
    padding: 12px;
    background: #ffffff;
}

.saved-quiz-question.is-correct {
    border-left-color: #22c55e;
}

.saved-quiz-question.is-wrong {
    border-left-color: #ef4444;
}

.saved-quiz-question-head {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: #0f172a;
}

.saved-quiz-question-head .saved-quiz-status {
    margin-left: auto;
    white-space: nowrap;
}

.saved-quiz-options,
.saved-quiz-descriptive {
    display: grid;
    gap: 8px;
    margin-top: 10px;
}

.saved-quiz-option,
.saved-quiz-answer,
.saved-quiz-feedback {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 9px 10px;
    background: #f8fafc;
}

.saved-quiz-option {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 8px;
    align-items: start;
}

.saved-quiz-option--selected-correct,
.saved-quiz-answer--correct,
.saved-quiz-feedback.saved-quiz-answer--correct {
    border-color: #86efac;
    background: #f0fdf4;
    color: #14532d;
}

.saved-quiz-option--selected-wrong,
.saved-quiz-answer--wrong,
.saved-quiz-feedback.saved-quiz-answer--wrong {
    border-color: #fca5a5;
    background: #fef2f2;
    color: #7f1d1d;
}

.saved-quiz-option--correct-answer {
    box-shadow: inset 3px 0 0 #22c55e;
}

.saved-quiz-answer p,
.saved-quiz-feedback p {
    margin: 6px 0 0;
}

.saved-card-body {
    padding: 20px;
    padding-right: 72px; /* reserve space for CHAT/QUIZ badge so Expand/Copy buttons don't overlap */
}

.saved-card-header-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.saved-card-title {
    margin: 0;
    font-size: 1rem;
    color: var(--tutorly-purple-dark);
    font-weight: 600;
    flex: 1;
    min-width: 0;
}

.saved-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex-shrink: 0;
}

.btn-saved-action {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 8px;
    border: 1px solid #E5E7EB;
    background: #fff;
    color: var(--tutorly-text);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-saved-action:hover {
    background: #F5F3FF;
    border-color: var(--tutorly-purple-light);
    color: var(--tutorly-purple-dark);
}

.btn-saved-copy:hover {
    background: #D1FAE5;
    border-color: #10B981;
    color: #047857;
}

.btn-saved-delete:hover {
    background: #FEE2E2;
    border-color: #EF4444;
    color: #B91C1C;
}

.btn-saved-copy.copied {
    background: #D1FAE5;
    border-color: #10B981;
    color: #047857;
}

.btn-saved-expand .btn-expand-icon {
    font-size: 0.7rem;
    transition: transform 0.2s;
}

.saved-card.expanded .btn-expand-icon {
    transform: rotate(180deg);
}

.saved-card-preview-wrap {
    position: relative;
}

.saved-card-content-full {
    display: none;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--tutorly-text);
    word-wrap: break-word;
    margin: 0 0 12px 0;
    padding: 16px;
    background: #f9fafb;
    border-radius: 8px;
    border: 1px solid #E5E7EB;
    max-height: 400px;
    overflow-y: auto;
}

.saved-card.expanded .saved-card-preview {
    display: none;
}

.saved-card.expanded .saved-card-content-full {
    display: block;
}

.saved-predefined-topic {
    margin-top: 14px;
}

.saved-predefined-topic h6 {
    margin: 0 0 8px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--tutorly-text);
}

.saved-predefined-topic p {
    margin: 0 0 8px;
}

.saved-predefined-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px;
    margin-top: 10px;
}

.saved-predefined-images-preview {
    grid-template-columns: repeat(auto-fit, minmax(84px, 1fr));
    margin: 8px 0 12px;
}

.saved-predefined-image {
    margin: 0;
    overflow: hidden;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    background: #fff;
}

.saved-predefined-image img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    background: #fff;
}

.saved-predefined-image figcaption {
    padding: 6px 8px;
    color: var(--tutorly-text-light);
    font-size: 0.78rem;
}

.saved-card-preview {
    margin: 0 0 12px 0;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--tutorly-text);
}

.saved-card-preview + .saved-card-preview {
    margin-top: -8px;
}

.saved-card-meta {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid #E5E7EB;
}

.saved-card-date {
    font-size: 0.8rem;
    color: var(--tutorly-text-light);
}

#saved-chat-filter-form {
    padding: 14px 16px;
    margin-bottom: 16px !important;
    background: #f8fafc;
}

#saved-chat-filter-form .saved-filter-bar {
    gap: 12px 16px;
}

#saved-chat-filter-form .saved-filter-bar__label {
    font-size: 0.76rem;
}

#saved-chat-filter-form .saved-filter-bar__input,
#saved-chat-filter-form .saved-filter-bar__btn {
    height: 36px;
    font-size: 0.86rem;
}

.saved-chat-list .saved-card-chat {
    display: block;
    border-top: 0;
    border-left: 4px solid #10b981;
    border-radius: 8px;
    box-shadow: none;
    overflow: visible;
}

.saved-chat-list .saved-card-chat:hover {
    transform: none;
    box-shadow: none;
    background: #fbfefc;
    border-color: #d1fae5;
    border-left-color: #059669;
}

.saved-chat-list .saved-card-badge {
    display: none;
}

.saved-chat-list .saved-card-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
        "header actions"
        "meta actions"
        "content content";
    gap: 8px 16px;
    padding: 14px 16px;
}

.saved-chat-list .saved-card-header-row {
    display: contents;
}

.saved-chat-list .saved-card-title {
    grid-area: header;
    margin: 0;
    color: #0f172a;
    font-size: 0.96rem;
    line-height: 1.35;
}

.saved-chat-list .saved-card-actions {
    grid-area: actions;
    justify-content: flex-end;
    align-self: start;
    gap: 6px;
}

.saved-chat-list .saved-card-actions form {
    display: inline-flex;
}

.saved-chat-list .btn-saved-action {
    min-height: 32px;
    padding: 5px 9px;
    font-size: 0.76rem;
    border-radius: 7px;
}

.saved-chat-list .saved-card-preview-wrap {
    grid-area: content;
    min-width: 0;
}

.saved-chat-list .saved-card-preview {
    display: -webkit-box;
    margin: 0;
    color: #475569;
    font-size: 0.88rem;
    line-height: 1.45;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.saved-chat-list .saved-card-content-full {
    margin: 4px 0 0;
    padding: 14px 16px;
    color: #1f2937;
    background: #ffffff;
    border-color: #d1fae5;
    border-left: 3px solid #10b981;
    border-radius: 8px;
    max-height: 460px;
}

.saved-chat-list .saved-card-meta {
    grid-area: meta;
    display: flex;
    align-items: center;
    margin-top: 0;
    padding-top: 2px;
    border-top: 0;
}

.saved-chat-list .saved-card-date {
    color: #64748b;
    font-size: 0.78rem;
}

.saved-chat-list .saved-predefined-topic {
    padding-top: 12px;
    margin-top: 12px;
    border-top: 1px solid #e2e8f0;
}

/* Saved Empty State */
.saved-empty-state {
    text-align: center;
    padding: 48px 24px;
    background: linear-gradient(180deg, #FAFAFA 0%, #F5F3FF 100%);
    border-radius: 16px;
    border: 2px dashed #C4B5FD;
}

.saved-empty-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.8;
}

.saved-empty-state h5 {
    margin-bottom: 12px;
    color: var(--tutorly-text);
    font-size: 1.25rem;
}

.saved-empty-state p {
    margin-bottom: 0;
    color: var(--tutorly-text-light);
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}

.saved-empty-state .btn-primary {
    background: var(--tutorly-purple);
    border-color: var(--tutorly-purple);
}

.saved-empty-state .btn-primary:hover {
    background: var(--tutorly-purple-dark);
    border-color: var(--tutorly-purple-dark);
}

/* Message Bubbles */
.message {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user,
.message.student {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.message.user .message-avatar,
.message.student .message-avatar {
    background: var(--tutorly-purple);
}

.message.tutor .message-avatar {
    background: #10B981;
}

.message-avatar-ai {
    color: #111827;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
}

.message-content {
    background: white;
    padding: 12px 16px;
    border-radius: 12px;
    max-width: 70%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message.user .message-content,
.message.student .message-content {
    background: var(--tutorly-purple);
    color: white;
}

.message.tutor .message-content {
    background: white;
    color: var(--tutorly-text);
    max-width: min(85%, 72ch);
    padding: 14px 18px;
}

.message-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
}

.message-header {
    font-weight: 600;
    font-size: 0.85rem;
    opacity: 0.8;
}

.btn-play-audio {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    padding: 0;
    background: linear-gradient(145deg, #8B5CF6 0%, #6D28D9 50%, #5B21B6 100%);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.45), 0 0 20px rgba(139, 92, 246, 0.15);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.btn-play-audio::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    border-radius: 50%;
    pointer-events: none;
}

.btn-play-audio:hover {
    transform: scale(1.12);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.55), 0 0 30px rgba(139, 92, 246, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-play-audio:active {
    transform: scale(1.02);
}

.btn-play-audio .play-icon {
    color: white;
    font-size: 13px;
    font-weight: bold;
    line-height: 1;
    margin-left: 3px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
    position: relative;
    z-index: 1;
}

.btn-play-audio.playing {
    background: linear-gradient(145deg, #10B981 0%, #059669 50%, #047857 100%);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.5), 0 0 20px rgba(16, 185, 129, 0.2);
    border-color: rgba(255, 255, 255, 0.35);
}

.btn-play-audio.playing:hover {
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6), 0 0 35px rgba(16, 185, 129, 0.25);
}

.message-text {
    white-space: normal;
    word-wrap: break-word;
    line-height: 1.68;
    text-align: left;
    font-size: 1.05rem;
}

.message-text strong {
    font-weight: 700;
}

.message-text em {
    font-style: italic;
}

.message-text code {
    background: rgba(107, 70, 193, 0.1);
    padding: 0.2em 0.45em;
    border-radius: 6px;
    font-size: 0.92em;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    border: 1px solid rgba(107, 70, 193, 0.2);
}

.message-text pre.bot-response-pre {
    margin: 0.6em 0;
    padding: 0.75em 1em;
    overflow-x: auto;
    background: rgba(107, 70, 193, 0.06);
    border: 1px solid rgba(107, 70, 193, 0.2);
    border-radius: 8px;
    line-height: 1.45;
}

.message-text pre.bot-response-pre code {
    display: block;
    padding: 0;
    margin: 0;
    background: transparent;
    border: none;
    border-radius: 0;
    font-size: 0.95em;
    white-space: pre;
}

.message.student .message-text code {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
}

/* Quiz feedback - standardized formatting (Concept, Step-by-step, Tip) */
#quizFeedbackSection.bot-response-formatted,
#quizFeedbackSection .bot-response-formatted {
    text-align: left;
    line-height: 1.6;
}

#quizFeedbackSection strong {
    font-weight: 700;
}

#quizFeedbackSection ul, #quizFeedbackSection ol,
.message-text ul, .message-text ol {
    margin: 0.75em 0 0.75em 1.25em;
    padding-left: 1.1em;
}

#quizFeedbackSection li, .message-text li {
    margin-bottom: 0.4em;
}

.bot-response-list {
    margin: 0.75em 0;
    padding: 0.5em 0 0.5em 0.5em;
    border-left: 3px solid rgba(107, 70, 193, 0.35);
    padding-left: 1em;
}

.message-text .bot-response-list {
    background: rgba(107, 70, 193, 0.04);
    border-radius: 0 8px 8px 0;
}

/* Predefined topic output */
.predefined-topic-message .message-content {
    max-width: min(92%, 980px);
}

.predefined-topic-admin-tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 4px 0 10px;
    padding: 8px;
    border: 1px solid #dbeafe;
    border-radius: 8px;
    background: #eff6ff;
}

.predefined-admin-btn {
    border: 1px solid #93c5fd;
    border-radius: 6px;
    background: #ffffff;
    color: #1d4ed8;
    cursor: pointer;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    padding: 7px 10px;
}

.predefined-admin-btn:hover {
    background: #dbeafe;
}

.predefined-admin-btn:disabled {
    cursor: wait;
    opacity: .65;
}

.predefined-admin-btn-danger {
    border-color: #fecaca;
    color: #b91c1c;
}

.predefined-admin-btn-danger:hover {
    background: #fee2e2;
}

.predefined-admin-file-btn {
    margin: 0;
}

.predefined-admin-status {
    color: #475569;
    font-size: 12px;
    font-weight: 600;
}

.predefined-admin-status.is-success {
    color: #15803d;
}

.predefined-admin-status.is-error {
    color: #b91c1c;
}

.predefined-topic-output {
    display: grid;
    gap: 16px;
}

.predefined-topic-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    color: var(--tutorly-text);
    font-size: 1.25rem;
    line-height: 1.25;
}

.predefined-topic-title-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    min-width: 28px;
    height: 28px;
    font-size: 1.15rem;
}

.predefined-topic-definition,
.predefined-topic-intro,
.predefined-topic-question p {
    margin: 0;
    color: var(--tutorly-text);
    line-height: 1.65;
}

.predefined-topic-images {
    display: block;
    gap: 8px;
}

.predefined-topic-image {
    min-width: 0;
    margin: 0;
    max-width: 560px;
    border: 1px solid var(--tutorly-border);
    border-radius: 8px;
    overflow: hidden;
    background: #FFFFFF;
}

.predefined-topic-image img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    background: #FFFFFF;
}

.predefined-topic-image figcaption {
    padding: 8px 10px;
    color: var(--tutorly-text-light);
    font-size: 0.84rem;
    line-height: 1.35;
}

.predefined-topic-learn,
.predefined-topic-question {
    display: grid;
    gap: 8px;
}

.predefined-topic-learn h4,
.predefined-topic-question h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--tutorly-text);
}

.predefined-topic-points {
    margin: 0;
    padding-left: 1.35rem;
}

.predefined-topic-points li {
    margin-bottom: 0.35rem;
}

.predefined-topic-output .topic-highlight {
    display: inline;
    padding: 0.08em 0.18em;
    border-radius: 4px;
    font-weight: 800;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}

.predefined-topic-output .topic-highlight-1 {
    color: #1D4ED8;
    background: #DBEAFE;
}

.predefined-topic-output .topic-highlight-2 {
    color: #047857;
    background: #D1FAE5;
}

.predefined-topic-output .topic-highlight-3 {
    color: #B45309;
    background: #FEF3C7;
}

.predefined-topic-output .topic-highlight-4 {
    color: #7E22CE;
    background: #F3E8FF;
}

.predefined-topic-output .topic-highlight-5 {
    color: #BE123C;
    background: #FFE4E6;
}

/* Follow-up questions in chat */
.follow-ups-container {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.follow-ups-label {
    display: block;
    color: var(--tutorly-text-light);
    font-size: 0.8rem;
    margin-bottom: 8px;
    font-weight: 500;
}

.follow-ups-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.follow-up-chip {
    display: inline-block;
    padding: 8px 14px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.12) 0%, rgba(124, 58, 237, 0.08) 100%);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--tutorly-purple);
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1.3;
}

.follow-up-chip:hover {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(124, 58, 237, 0.15) 100%);
    border-color: var(--tutorly-purple);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.2);
}

.follow-up-chip:active {
    transform: translateY(0);
}

/* Modern compact pagination (single line, rounded, primary active) */
.pagination-modern {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.pagination-modern__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.75rem 1.25rem;
    padding: 0.5rem 0;
}

.pagination-modern__results {
    font-size: 0.875rem;
    color: var(--tutorly-text-light);
    flex-shrink: 0;
}

.pagination-modern__nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-wrap: wrap;
    justify-content: center;
}

.pagination-modern__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--tutorly-text);
    background: var(--tutorly-white);
    border: 1px solid var(--tutorly-border);
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pagination-modern__btn:hover {
    background: var(--tutorly-bg);
    border-color: #D1D5DB;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.pagination-modern__btn--disabled {
    color: var(--tutorly-text-light);
    cursor: not-allowed;
    opacity: 0.7;
}

.pagination-modern__icon {
    flex-shrink: 0;
    vertical-align: middle;
}

.pagination-modern__pages {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.pagination-modern__page {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    height: 2rem;
    padding: 0 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--tutorly-text);
    background: var(--tutorly-white);
    border: 1px solid var(--tutorly-border);
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pagination-modern__page:hover {
    background: var(--tutorly-bg);
    border-color: #D1D5DB;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.pagination-modern__page--active {
    background: var(--tutorly-purple);
    color: var(--tutorly-white);
    border-color: var(--tutorly-purple);
    cursor: default;
}

.pagination-modern__page--active:hover {
    background: var(--tutorly-purple-dark);
    border-color: var(--tutorly-purple-dark);
}

.pagination-modern__ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    height: 2rem;
    font-size: 0.875rem;
    color: var(--tutorly-text-light);
}

@media (max-width: 575.98px) {
    .pagination-modern__inner {
        gap: 0.5rem 1rem;
    }
    .pagination-modern__results {
        width: 100%;
        text-align: center;
        order: -1;
    }
    .pagination-modern__btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.8125rem;
    }
    .pagination-modern__page {
        min-width: 1.75rem;
        height: 1.75rem;
        font-size: 0.8125rem;
    }
}

.loading-message {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    background: white;
    border-radius: 12px;
    max-width: 80px;
}

.loading-dot {
    width: 8px;
    height: 8px;
    background: var(--tutorly-text-light);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.loading-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.loading-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .tutorly-sidebar {
        width: 85%;
        max-width: 320px;
        position: fixed;
        left: -100%;
        top: 0;
        /* Dynamic viewport: avoids content hidden behind mobile browser chrome */
        height: 100vh;
        max-height: 100vh;
        height: 100dvh;
        max-height: 100dvh;
        z-index: 1002;
        transition: left 0.3s;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
        box-sizing: border-box;
        /* Single scroll region: .sidebar-content (footer stays visible) */
        overflow-y: hidden;
        overflow-x: hidden;
        min-height: 0;
    }

    .tutorly-sidebar.open {
        left: 0;
    }

    .main-tutorly-content {
        padding: 20px;
    }

    .topics-grid:not(.quiz-topic-cards-grid) {
        grid-template-columns: 1fr;
    }

    .topics-grid.quiz-topic-cards-grid {
        grid-template-columns: 1fr;
    }

    .header-container {
        flex-wrap: wrap;
    }

    .header-right {
        flex-wrap: wrap;
        justify-content: flex-end;
        max-width: 100%;
    }

    .header-right > * {
        max-width: 100%;
    }

    .btn-upgrade {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}

/* Videos Section */
.videos-section {
    padding: 20px 0;
}

.videos-header {
    margin-bottom: 24px;
}

.videos-header h4 {
    color: var(--tutorly-purple-dark);
    margin-bottom: 8px;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 26px;
    margin-bottom: 36px;
}

.videos-tab-content .videos-grid:last-child,
.papers-tab-content .videos-grid:last-child,
.notes-tab-content .videos-grid:last-child {
    margin-bottom: 0;
}

.video-card {
    background: var(--tutorly-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    background: #000;
    overflow: hidden;
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-thumbnail-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    background: linear-gradient(135deg, var(--tutorly-purple-light), var(--tutorly-purple));
    color: white;
}

.video-play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
}

.video-card:hover .video-play-overlay {
    opacity: 1;
}

.play-icon {
    font-size: 3rem;
    color: white;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid white;
    padding-left: 8px; /* Adjust play icon position */
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Coming Soon video: deadline overlay on thumbnail */
.video-coming-soon-deadline {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(245, 158, 11, 0.95);
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
}

.video-deadline-text {
    font-size: 0.8rem !important;
}

.featured-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: linear-gradient(135deg, #FCD34D, #F59E0B);
    color: #1F2937;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.video-info {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.video-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--tutorly-text);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.video-type,
.video-genre,
.video-rating {
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    background: var(--tutorly-bg);
    color: var(--tutorly-text-light);
    font-weight: 500;
}

.video-type {
    background: var(--tutorly-purple-light);
    color: var(--tutorly-purple-dark);
}

.video-rating {
    background: #FEF3C7;
    color: #92400E;
}

.video-subject {
    font-size: 0.85rem;
    color: var(--tutorly-text-light);
    margin-bottom: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.video-description {
    font-size: 0.875rem;
    color: var(--tutorly-text-light);
    line-height: 1.5;
    margin-top: auto;
}

.no-videos-message {
    text-align: center;
    padding: 60px 20px;
}

.no-videos-message .placeholder-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.featured-videos-section {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 2px solid var(--tutorly-border);
}

.featured-videos-section h5 {
    color: var(--tutorly-purple-dark);
    font-weight: 600;
}

/* Video Modal */
.video-player-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

.video-player-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-modal-description {
    color: var(--tutorly-text);
    line-height: 1.6;
}

.video-modal-description p {
    margin: 0;
}

/* Responsive adjustments for videos */
@media (max-width: 768px) {
    .videos-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 16px;
    }
    
    .video-card {
        border-radius: 8px;
    }
    
    .video-info {
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .videos-grid {
        grid-template-columns: 1fr;
    }
}

/* Compact header for chat page on mobile */
.header-mobile-view-more {
    display: none;
}

@media (max-width: 768px) {
    .tutorly-chat-page .header-mobile-secondary {
        display: none !important;
    }

    .tutorly-chat-page.tutorly-chat-header-expanded .header-mobile-secondary {
        display: inline-flex !important;
    }

    .tutorly-chat-page .header-right {
        gap: 10px;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .header-mobile-view-more {
        border: 1px solid rgba(107, 70, 193, 0.25);
        background: #fff;
        color: var(--tutorly-purple);
        border-radius: 999px;
        padding: 6px 10px;
        font-size: 0.78rem;
        font-weight: 600;
        line-height: 1;
        cursor: pointer;
    }

    .tutorly-chat-page .header-mobile-view-more {
        display: inline-flex;
        align-items: center;
    }

    .tutorly-chat-page.tutorly-chat-header-expanded .header-mobile-view-more {
        background: rgba(107, 70, 193, 0.08);
    }
}

/* Device-specific fix: keep chat header "View more" reliably tappable on 360x740 and 412x915 class viewports */
@media (max-width: 412px) and (min-width: 360px) and (min-height: 740px) and (max-height: 915px) {
    .tutorly-chat-page .header-right {
        width: 100%;
        justify-content: flex-end;
        align-items: center;
        gap: 8px;
    }

    .tutorly-chat-page .header-mobile-view-more {
        position: relative;
        z-index: 2;
        pointer-events: auto;
        min-height: 32px;
        padding: 7px 12px;
        touch-action: manipulation;
    }

    .tutorly-chat-page.tutorly-chat-header-expanded .header-mobile-secondary {
        flex: 0 1 auto;
    }
}

/* ========== App Chat Landing (when no subject selected) ========== */
.chat-landing {
    padding: 2rem 1.5rem 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.chat-landing-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.chat-landing-hero-avatar-wrap {
    flex-shrink: 0;
    width: 280px;
    height: 308px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(107, 70, 193, 0.25);
}

.tutor-avatar-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

.tutor-avatar-svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 4px 12px rgba(107, 70, 193, 0.2));
}

.avatar-neck {
    animation: avatar-float 3s ease-in-out infinite 0.02s;
}

.avatar-head {
    animation: avatar-float 3s ease-in-out infinite;
}

.avatar-glasses {
    animation: avatar-float 3s ease-in-out infinite 0.1s;
}

.avatar-eye-left,
.avatar-eye-right {
    animation: avatar-blink 4s ease-in-out infinite;
}

.avatar-eye-right {
    animation-delay: 0.05s;
}

.avatar-wave-hand {
    animation: avatar-wave 2s ease-in-out infinite;
    transform-origin: 152px 152px;
}

.avatar-body {
    animation: avatar-float 3s ease-in-out infinite 0.05s;
}


@keyframes avatar-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

@keyframes avatar-blink {
    0%, 45%, 55%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.12); }
}

@keyframes avatar-wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-18deg); }
    75% { transform: rotate(8deg); }
}

.chat-landing-hero-text {
    flex: 1;
    min-width: 260px;
    text-align: center;
}

.chat-landing-voice-btn {
    margin-top: 0.75rem;
    padding: 8px 16px;
    background: var(--tutorly-bg);
    border: 1px solid var(--tutorly-border);
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--tutorly-text-light);
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.chat-landing-voice-btn:hover {
    background: var(--tutorly-purple-light);
    color: var(--tutorly-purple-dark);
    border-color: var(--tutorly-purple);
}

.chat-landing-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--tutorly-purple-dark);
    margin-bottom: 0.5rem;
}

.chat-landing-subtitle {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--tutorly-purple-dark);
    margin-bottom: 0.75rem;
}

.chat-landing-desc {
    font-size: 1rem;
    color: var(--tutorly-text-light);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.5;
}

.chat-landing-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.chat-landing-card {
    background: var(--tutorly-white);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--tutorly-border);
    transition: box-shadow 0.2s, transform 0.2s;
}

.chat-landing-card:hover {
    box-shadow: 0 8px 24px rgba(107, 70, 193, 0.12);
    transform: translateY(-2px);
}

.chat-landing-card-icon {
    font-size: 2.25rem;
    margin-bottom: 0.75rem;
}

.chat-landing-card h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--tutorly-text);
    margin-bottom: 0.5rem;
}

.chat-landing-card p {
    font-size: 0.9rem;
    color: var(--tutorly-text-light);
    line-height: 1.45;
    margin: 0;
}

.chat-landing-quick-access {
    background: var(--tutorly-white);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--tutorly-border);
}

.chat-landing-quick-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.chat-landing-quick-header h4 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--tutorly-text);
    margin: 0 0 0.25rem 0;
}

.chat-landing-quick-sub {
    font-size: 0.95rem;
    color: var(--tutorly-text-light);
    margin: 0;
}

.chat-landing-signin-hint {
    font-size: 0.875rem;
    color: var(--tutorly-text-light);
}

.chat-landing-quick-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.chat-landing-quick-btn {
    display: block;
    padding: 12px 16px;
    background: var(--tutorly-bg);
    border: 1px solid var(--tutorly-border);
    border-radius: 12px;
    color: var(--tutorly-text);
    font-weight: 500;
    font-size: 0.95rem;
    text-align: center;
    text-decoration: none;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.chat-landing-quick-btn:hover {
    background: var(--tutorly-purple);
    color: white;
    border-color: var(--tutorly-purple);
}

.chat-landing-cta-text {
    font-size: 0.95rem;
    color: var(--tutorly-text-light);
    margin-bottom: 0.75rem;
}

.chat-landing-cta-btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--tutorly-purple);
    color: white;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: background 0.2s;
}

.chat-landing-cta-btn:hover {
    background: var(--tutorly-purple-dark);
    color: white;
}

@media (max-width: 768px) {
    .chat-landing-hero {
        flex-direction: column;
    }
    .chat-landing-hero-avatar-wrap {
        width: 180px;
        height: 198px;
    }
    .chat-landing-features {
        grid-template-columns: 1fr;
    }
    .chat-landing-quick-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== Mobile Sidebar Toggle & Overlay ========== */
.tutorly-sidebar-toggle {
    display: none;
    background: var(--tutorly-purple);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    margin-right: 12px;
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
}

.tutorly-sidebar-toggle:hover {
    background: var(--tutorly-purple-dark);
    color: white;
}

@media (max-width: 768px) {
    .tutorly-sidebar-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
}

.tutorly-sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    opacity: 0;
    transition: opacity 0.3s;
}

.tutorly-sidebar-overlay.show {
    display: block;
    opacity: 1;
}

@media (min-width: 768px) {
    .tutorly-sidebar-overlay {
        display: none !important;
    }
}

.tutorly-sidebar-close {
    display: none;
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 8px;
    background: var(--tutorly-bg);
    color: var(--tutorly-text);
    font-size: 1.25rem;
    cursor: pointer;
    z-index: 10;
}

@media (max-width: 768px) {
    /*
     * Scrollport: flex children default to min-height:auto and won't shrink unless basis is 0
     * and height is bounded. Without this, .sidebar-content grows with content and never scrolls
     * (Primary 4 / lower subjects stay off-screen with no scrollbar).
     */
    .tutorly-sidebar .sidebar-content {
        padding-top: 50px;
        padding-bottom: 12px;
        flex: 1 1 0%;
        min-height: 0;
        /* With column flex + fixed aside height, height:0 lets this item take remaining space and scroll */
        height: 0;
        align-self: stretch;
        overflow-y: auto;
        overflow-x: hidden;
        -webkit-overflow-scrolling: touch;
        touch-action: pan-y;
        overscroll-behavior-y: contain;
    }

    .tutorly-sidebar .sidebar-footer {
        padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    }

    .tutorly-sidebar-close {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .tutorly-sidebar .level-header {
        min-height: 44px;
        padding: 10px 14px;
        font-size: 0.9375rem;
    }

    .tutorly-sidebar .subject-item {
        min-height: 44px;
        padding: 10px 12px 10px 16px;
        margin: 0 6px 3px;
        font-size: 0.875rem;
        gap: 8px;
    }

    .tutorly-sidebar .subject-name {
        min-width: 0;
        overflow-wrap: anywhere;
        word-break: break-word;
        line-height: 1.35;
    }

}

@media (min-width: 769px) {
    .tutorly-sidebar-close {
        display: none !important;
    }

    /* Same scrollport fix as mobile: flex column must get a bounded height or menu never scrolls */
    .tutorly-sidebar .sidebar-content {
        flex: 1 1 0%;
        min-height: 0;
        height: 0;
        align-self: stretch;
    }
}

/* ========== App Chat Page - Mobile Responsive ========== */
@media (max-width: 768px) {
    .content-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 16px;
    }

    .level-subject-title {
        font-size: 1.35rem;
        line-height: 1.3;
    }

    .tabs-container {
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        margin-bottom: 20px;
        padding-bottom: 4px;
        scrollbar-width: thin;
    }

    .tabs-container::-webkit-scrollbar {
        height: 4px;
    }

    .tab-button {
        flex-shrink: 0;
        padding: 10px 14px;
        font-size: 0.875rem;
    }

    .chat-intro-section {
        padding: 16px;
        margin-bottom: 16px;
    }

    .chat-header-row {
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 12px;
    }

    .chat-header-row h4 {
        font-size: 1.1rem;
        width: 100%;
    }

    .chat-header-row .btn-help,
    .chat-header-row .btn-outline-secondary {
        font-size: 0.85rem;
        padding: 6px 12px;
    }

    .chat-prompt {
        font-size: 0.9rem;
        margin-bottom: 16px;
    }

    .popular-topics-section,
    .topics-section-card {
        padding: 16px;
    }

    .greeting-section h3 {
        font-size: 1.25rem;
    }

    .greeting-subtitle {
        font-size: 0.9rem;
    }

    .chat-interface-section {
        padding: 16px;
        overflow-x: hidden;
        box-sizing: border-box;
    }

    .chat-messages-container {
        max-height: min(60vh, 520px);
    }

    .message-content {
        max-width: 92%;
    }

    .message.tutor .message-content {
        max-width: 92%;
    }

    .message-text {
        font-size: 1rem;
    }

    .predefined-topic-message .message-content {
        max-width: 100%;
    }

    .predefined-topic-output {
        gap: 14px;
    }

    .predefined-topic-title {
        font-size: 1.15rem;
    }

    .predefined-topic-images {
        display: flex;
        gap: 12px;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        padding: 2px 2px 12px;
        margin: 0 -2px;
        scrollbar-width: thin;
    }

    .predefined-topic-image {
        flex: 0 0 min(86%, 360px);
        scroll-snap-align: start;
    }

    .predefined-topic-image img {
        aspect-ratio: 4 / 3;
        max-height: 260px;
        object-fit: contain;
    }

    .chat-input-section {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .input-group-custom {
        flex-wrap: wrap;
        gap: 8px;
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .chat-input {
        padding: 10px 12px;
        font-size: 0.95rem;
        min-width: 0;
        flex: 1 1 auto;
        order: 1;
    }

    .btn-voice, .btn-upload {
        padding: 10px;
        min-width: 40px;
        order: 2;
    }

    .btn-ask {
        padding: 10px 16px;
        font-size: 0.9rem;
        flex: 1 1 100%;
        width: 100%;
        order: 3;
        justify-content: center;
    }

    .btn-ask span {
        font-size: 0.9rem;
    }

    .welcome-message h4 {
        font-size: 1.1rem;
    }

    .welcome-message p {
        font-size: 0.9rem;
    }

    .topic-card {
        padding: 12px;
    }

    .topic-card h6 {
        font-size: 0.95rem;
    }

    .topic-card p {
        font-size: 0.85rem;
    }

    .tutorly-main {
        min-width: 0;
        overflow-x: hidden;
    }
}

@media (max-width: 480px) {
    .main-tutorly-content {
        padding: 12px 16px;
    }

    .header-right {
        gap: 8px;
    }

    .btn-contact, .btn-upgrade {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .content-header .header-right {
        width: 100%;
    }

    .content-header .header-right .btn {
        width: 100%;
    }

    .chat-header-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .chat-header-row .btn-help {
        width: 100%;
    }

    .chat-interface-section {
        padding: 12px;
    }

    .message-content {
        max-width: 95%;
    }

    .message.tutor .message-content {
        max-width: 95%;
    }

    .message-text {
        font-size: 0.9375rem;
    }

    .input-group-custom {
        gap: 4px;
    }

    .chat-input {
        padding: 10px;
        font-size: 16px; /* prevents zoom on iOS */
    }

    .btn-voice, .btn-upload {
        padding: 8px 10px;
        min-width: 36px;
    }

    .btn-ask {
        padding: 8px 10px;
        font-size: 0.85rem;
    }

    .input-group-custom .btn-voice span {
        font-size: 1rem;
    }

    .input-group-custom .btn-upload .btn-upload-icon {
        width: 18px;
        height: 18px;
        display: block;
    }

    .btn-ask span:not(.btn-ask-text) {
        font-size: 1rem;
    }

    .saved-cards-grid {
        grid-template-columns: 1fr;
    }
}

/* Very narrow screens - compact Ask button */
@media (max-width: 360px) {
    .btn-ask .btn-ask-text {
        display: none;
    }

    .btn-ask {
        padding: 8px 10px;
    }
}