/* Video lesson page — layout adapted from new_lesson.html */
/* Typography: 1.5rem body minimum; 1.3rem secondary labels */

.mg-lesson .form-control,
.mg-lesson .form-select,
.mg-lesson textarea,
.mg-lesson input {
    font-size: 1.5rem !important;
}

.mg-lesson .form-control::placeholder,
.mg-lesson textarea::placeholder,
.mg-lesson input::placeholder {
    font-size: 1.5rem !important;
    opacity: 0.65;
}

.mg-lesson {
    --lesson-ink: #14213d;
    --lesson-muted: #6b7280;
    --lesson-line: #e7ecf3;
    --lesson-brand: #0d6efd;
    --lesson-brand-2: #6c63ff;
    --lesson-brand-soft: rgba(13, 110, 253, 0.1);
    --lesson-shadow: 0 14px 40px rgba(15, 23, 42, 0.08);
    --lesson-radius: 22px;
    font-size: 1.5rem;
    line-height: 1.55;
}

.mg-lesson .lesson-shell {
    max-width: 1400px;
    margin: 0 auto;
}

.mg-lesson .mg-page-hero {
    margin-bottom: 0;
    border-radius: 0;
}

.mg-lesson .lesson-hero-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 0 1.25rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--lesson-line);
}

.mg-lesson .lesson-hero-toolbar-actions,
.mg-lesson .lesson-hero-toolbar-share {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
}

.mg-lesson .lesson-hero {
    background: linear-gradient(135deg, rgba(20, 33, 61, 0.96), rgba(41, 59, 102, 0.95));
    color: #fff;
    border-radius: 28px;
    box-shadow: var(--lesson-shadow);
    padding: 24px 26px;
    position: relative;
    overflow: hidden;
    margin-bottom: 22px;
}

.mg-lesson .lesson-hero::after {
    content: "";
    position: absolute;
    inset: auto -40px -60px auto;
    width: 240px;
    height: 240px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.45), rgba(59, 130, 246, 0));
    pointer-events: none;
}

.mg-lesson .lesson-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border-radius: 999px;
    padding: 0.42rem 0.82rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.mg-lesson .lesson-hero-title {
    font-size: clamp(2rem, 2.8vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0.8rem 0 0.5rem;
    color: #fff;
}

.mg-lesson .lesson-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.5rem;
}

.mg-lesson .lesson-hero-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.mg-lesson .lesson-btn-soft-light {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    border-radius: 14px;
    padding: 0.8rem 1rem;
    font-size: 1.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.mg-lesson .lesson-btn-soft-light:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.mg-lesson .lesson-main-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.75fr) minmax(320px, 0.95fr);
    gap: 22px;
    align-items: start;
}

.mg-lesson .lesson-primary-column {
    display: flex;
    flex-direction: column;
    gap: 22px;
    min-width: 0;
}

.mg-lesson .lesson-panel {
    background: #fff;
    border: 1px solid rgba(226, 232, 240, 0.85);
    border-radius: var(--lesson-radius);
    box-shadow: var(--lesson-shadow);
}

.mg-lesson .lesson-video-panel {
    overflow: hidden;
}

.mg-lesson .lesson-video-frame {
    position: relative;
    aspect-ratio: 16 / 9;
    background: linear-gradient(145deg, #09101c, #111827);
}

.mg-lesson .lesson-video-frame #maths_video,
.mg-lesson .lesson-video-frame iframe {
    width: 100%;
    height: 100%;
}

.mg-lesson .lesson-video-lock {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(9, 16, 28, 0.88);
    color: #fff;
    text-align: center;
    padding: 2rem;
    font-size: 1.5rem;
}

.mg-lesson .lesson-quick-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    padding: 18px;
    border-top: 1px solid var(--lesson-line);
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.035), rgba(255, 255, 255, 0));
}

.mg-lesson .lesson-stat-card {
    border: 1px solid var(--lesson-line);
    border-radius: 18px;
    padding: 14px 16px;
    background: #fff;
}

.mg-lesson .lesson-stat-label {
    font-size: 1.3rem;
    color: var(--lesson-muted);
    margin-bottom: 0.3rem;
}

.mg-lesson .lesson-stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.mg-lesson .lesson-sidebar-panel {
    padding: 18px;
}

.mg-lesson .lesson-sticky-stack {
    position: sticky;
    top: 18px;
    display: grid;
    gap: 18px;
    align-self: start;
}

.mg-lesson .lesson-section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 14px;
}

.mg-lesson .lesson-section-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.02em;
}

.mg-lesson .lesson-section-sub {
    font-size: 1.5rem;
    color: var(--lesson-muted);
}

.mg-lesson .lesson-progress-shell {
    background: #f8fbff;
    border: 1px solid var(--lesson-line);
    border-radius: 18px;
    padding: 14px;
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.mg-lesson .lesson-chapter-list {
    display: grid;
    gap: 10px;
    max-height: 420px;
    overflow: auto;
    padding-right: 4px;
}

.mg-lesson .lesson-chapter-item {
    border: 1px solid var(--lesson-line);
    border-radius: 18px;
    padding: 13px 14px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    cursor: pointer;
    background: #fff;
    transition: all 0.18s ease;
    width: 100%;
    text-align: left;
    font-size: 1.5rem;
}

.mg-lesson .lesson-chapter-item:hover {
    transform: translateY(-1px);
    border-color: #cfe0fb;
    box-shadow: 0 8px 22px rgba(59, 130, 246, 0.08);
}

.mg-lesson .lesson-chapter-item.active {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.08));
    border-color: #bcd3fa;
}

.mg-lesson .lesson-chapter-time {
    flex: 0 0 auto;
    min-width: 72px;
    text-align: center;
    border-radius: 12px;
    background: var(--lesson-brand-soft);
    color: var(--lesson-brand);
    font-size: 1.3rem;
    font-weight: 800;
    padding: 0.4rem 0.5rem;
}

.mg-lesson .lesson-chapter-item.active .lesson-chapter-time {
    background: #fff;
    color: #2563eb;
}

.mg-lesson .lesson-chapter-copy strong {
    display: block;
    color: var(--lesson-ink);
    margin-bottom: 0.18rem;
    font-size: 1.5rem;
}

.mg-lesson .lesson-mini-list {
    display: grid;
    gap: 10px;
}

.mg-lesson .lesson-resource-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border: 1px solid var(--lesson-line);
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    background: #fff;
    transition: all 0.18s ease;
    font-size: 1.5rem;
}

.mg-lesson .lesson-resource-row:hover {
    border-color: #cfe0fb;
    color: inherit;
    transform: translateY(-1px);
}

.mg-lesson .lesson-resource-left {
    display: flex;
    gap: 12px;
    align-items: center;
}

.mg-lesson .lesson-resource-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(139, 92, 246, 0.12));
    color: #2563eb;
    font-size: 1.5rem;
}

.mg-lesson .lesson-resource-meta strong {
    display: block;
    font-size: 1.5rem;
}

.mg-lesson .lesson-resource-meta span {
    display: block;
    color: var(--lesson-muted);
    font-size: 1.5rem;
}

.mg-lesson .lesson-tabs-panel {
    margin-top: 0;
    overflow: hidden;
}

.mg-lesson .lesson-nav-pills {
    padding: 16px 16px 0;
    gap: 10px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--lesson-line);
}

.mg-lesson .lesson-nav-pills .nav-link {
    border-radius: 12px 12px 0 0;
    color: var(--lesson-muted);
    font-weight: 700;
    font-size: 1.5rem;
    padding: 0.85rem 1rem;
}

.mg-lesson .lesson-nav-pills .nav-link.active {
    background: #fff;
    color: var(--lesson-ink);
    border: 1px solid var(--lesson-line);
    border-bottom-color: #fff;
}

.mg-lesson .lesson-tab-pane {
    padding: 22px;
}

.mg-lesson .lesson-two-col {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 18px;
}

.mg-lesson .lesson-content-block {
    border: 1px solid var(--lesson-line);
    border-radius: 20px;
    padding: 18px;
    background: #fff;
    font-size: 1.5rem;
}

.mg-lesson .lesson-content-block h5 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.mg-lesson .lesson-content-block h6 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.mg-lesson .lesson-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.mg-lesson .lesson-chip {
    background: #f8fbff;
    border: 1px solid var(--lesson-line);
    border-radius: 999px;
    padding: 0.5rem 0.8rem;
    font-size: 1.3rem;
    color: #334155;
    font-weight: 600;
}

.mg-lesson .lesson-transcript-wrap {
    max-height: 420px;
    overflow: auto;
    border: 1px solid var(--lesson-line);
    border-radius: 18px;
    padding: 8px;
    background: #fff;
}

.mg-lesson .lesson-transcript-line {
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 14px;
    cursor: pointer;
    transition: background 0.18s ease;
    width: 100%;
    text-align: left;
    border: 0;
    background: transparent;
    font-size: 1.5rem;
}

.mg-lesson .lesson-transcript-line:hover {
    background: #f8fbff;
}

.mg-lesson .lesson-transcript-line.active {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.08));
}

.mg-lesson .lesson-transcript-time {
    font-size: 1.3rem;
    font-weight: 800;
    color: #2563eb;
    padding-top: 2px;
}

.mg-lesson .lesson-transcript-text {
    color: #334155;
    line-height: 1.6;
    font-size: 1.5rem;
}

.mg-lesson .lesson-comments-placeholder {
    border: 1px dashed #bfd4fb;
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.06), rgba(255, 255, 255, 0));
    border-radius: 20px;
    padding: 28px 22px;
    text-align: center;
    font-size: 1.5rem;
}

.mg-lesson .lesson-upgrade-box {
    border: 1px solid var(--lesson-line);
    border-radius: 18px;
    padding: 18px;
    background: #f8fbff;
    font-size: 1.5rem;
}

.mg-lesson .text-muted,
.mg-lesson .text-secondary,
.mg-lesson small,
.mg-lesson .small {
    font-size: 1.5rem;
}

@media (max-width: 1200px) {
    .mg-lesson .lesson-main-grid {
        grid-template-columns: 1fr;
    }

    .mg-lesson .lesson-sticky-stack {
        position: static;
    }
}

@media (max-width: 768px) {
    .mg-lesson .lesson-hero {
        padding: 20px 18px;
    }

    .mg-lesson .lesson-hero-actions {
        justify-content: flex-start;
        margin-top: 14px;
    }

    .mg-lesson .lesson-quick-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .mg-lesson .lesson-two-col {
        grid-template-columns: 1fr;
    }

    .mg-lesson .lesson-tab-pane {
        padding: 18px;
    }
}

@media (max-width: 540px) {
    .mg-lesson .lesson-quick-stats {
        grid-template-columns: 1fr;
    }

    .mg-lesson .lesson-transcript-line {
        grid-template-columns: 1fr;
    }
}

/* Lesson pages use the report widget instead of the global back-to-top control */
.rbt-progress-parent {
    display: none !important;
}

/* Floating report-problem widget */
.lesson-report-fab {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 1040;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.85rem;
    max-width: min(28rem, calc(100vw - 2.5rem));
    font-size: 1.5rem;
}

.lesson-report-trigger {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    padding: 0.9rem 1.25rem 0.9rem 0.9rem;
    border: 0;
    border-radius: 1.25rem;
    background: #14213d;
    color: #fff;
    text-align: left;
    box-shadow: 0 14px 30px rgba(20, 33, 61, 0.28);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.lesson-report-trigger::before {
    content: "";
    position: absolute;
    inset: -4px;
    border-radius: 1.25rem;
    border: 2px solid rgba(245, 158, 11, 0.45);
    opacity: 0;
    animation: lesson-report-pulse 2.4s ease-out infinite;
    pointer-events: none;
}

.lesson-report-trigger:hover,
.lesson-report-trigger:focus-visible {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(20, 33, 61, 0.34);
}

.lesson-report-trigger-icon {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    width: 3.35rem;
    height: 3.35rem;
    border-radius: 1rem;
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
    flex-shrink: 0;
}

.lesson-report-trigger-icon i {
    font-size: 1.55rem;
}

.lesson-report-trigger-copy {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
}

.lesson-report-trigger-line {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
}

.lesson-report-trigger-hint {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.25;
    color: rgba(255, 255, 255, 0.78);
}

@keyframes lesson-report-pulse {
    0% {
        opacity: 0.7;
        transform: scale(1);
    }

    70% {
        opacity: 0;
        transform: scale(1.08);
    }

    100% {
        opacity: 0;
        transform: scale(1.08);
    }
}

.lesson-report-panel {
    width: min(28rem, calc(100vw - 2.5rem));
    padding: 1.5rem;
    border-radius: 1.15rem;
    background: #fff;
    border: 1px solid #e7ecf3;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.16);
}

.lesson-report-panel[hidden] {
    display: none !important;
}

.lesson-report-panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.85rem;
    margin-bottom: 1.15rem;
}

.lesson-report-panel-header .btn-close {
    width: 1.15rem;
    height: 1.15rem;
    margin-top: 0.2rem;
}

.lesson-report-eyebrow {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #6b7280;
}

.lesson-report-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #14213d;
}

.lesson-report-form .form-label {
    font-size: 1.35rem;
    font-weight: 600;
    color: #14213d;
    margin-bottom: 0.65rem;
}

.lesson-report-form textarea,
.lesson-report-form textarea::placeholder {
    font-size: 1.5rem !important;
    line-height: 1.5;
}

.lesson-report-form textarea {
    min-height: 9.5rem;
    margin-bottom: 1rem;
    padding: 0.9rem 1rem;
}

.lesson-report-form .invalid-feedback {
    font-size: 1.15rem;
}

.lesson-report-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    font-size: 1.35rem !important;
    padding: 0.9rem 1.25rem !important;
    min-height: 3.5rem;
}

.lesson-report-submit i {
    font-size: 1.25rem;
}

.lesson-report-success {
    text-align: center;
}

.lesson-report-success .btn {
    font-size: 1.25rem !important;
    padding: 0.85rem 1.15rem !important;
}

.lesson-report-success-icon {
    width: 3.5rem;
    height: 3.5rem;
    margin: 0 auto 1rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(25, 135, 84, 0.12);
    color: #198754;
    font-size: 1.5rem;
}

.lesson-report-success p {
    margin: 0;
    color: #4b5563;
    font-size: 1.35rem;
    line-height: 1.5;
}

@media (max-width: 575.98px) {
    .lesson-report-fab {
        right: 0.85rem;
        bottom: 0.85rem;
    }

    .lesson-report-trigger-copy {
        display: none;
    }

    .lesson-report-trigger {
        width: 4rem;
        height: 4rem;
        padding: 0;
        justify-content: center;
        border-radius: 50%;
    }

    .lesson-report-trigger-icon {
        width: 2.85rem;
        height: 2.85rem;
        border-radius: 50%;
    }

    .lesson-report-trigger-icon i {
        font-size: 1.4rem;
    }
}