/*
 * WalchandPRO — Enterprise Learning Platform
 * Course Detail Page Styles
 *
 * Copyright © 2025 Euclideum Solutions Private Limited.
 */

/* ============================================
   Hero Section with Animated Gradient
   ============================================ */
.course-hero {
    position: relative;
    padding: 48px 16px;
    min-height: auto;
    display: flex;
    align-items: center;
    overflow: hidden;
    background-color: #0a1628;
}

@media (min-width: 480px) {
    .course-hero {
        padding: 56px 24px;
    }
}

@media (min-width: 768px) {
    .course-hero {
        padding: 64px 40px;
    }
}

@media (min-width: 1400px) {
    .course-hero {
        padding: 72px 56px;
    }
}

/* Animated Gradient Background */
.course-hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

/* Gradient Blobs */
.course-hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: blobFloat 20s ease-in-out infinite;
}

.course-hero-blob--1 {
    width: 60%;
    height: 60%;
    top: -20%;
    left: -10%;
    background: radial-gradient(circle, #154f95 0%, transparent 70%);
    animation-delay: 0s;
}

.course-hero-blob--2 {
    width: 50%;
    height: 50%;
    top: 30%;
    right: -15%;
    background: radial-gradient(circle, #1d4ed8 0%, transparent 70%);
    animation-delay: -5s;
    animation-duration: 25s;
}

.course-hero-blob--3 {
    width: 45%;
    height: 45%;
    bottom: -10%;
    left: 30%;
    background: radial-gradient(circle, #60a5fa 0%, transparent 70%);
    animation-delay: -10s;
    animation-duration: 22s;
}

.course-hero-blob--4 {
    width: 35%;
    height: 35%;
    top: 50%;
    left: 10%;
    background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
    animation-delay: -15s;
    animation-duration: 18s;
}

@keyframes blobFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(5%, 10%) scale(1.05);
    }
    50% {
        transform: translate(-5%, 5%) scale(0.95);
    }
    75% {
        transform: translate(10%, -5%) scale(1.02);
    }
}

/* Grain Overlay */
.course-hero-grain {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 600 600'%3E%3Cfilter id='a'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23a)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 180px;
    opacity: 0.08;
    pointer-events: none;
    z-index: 1;
}

/* Dark overlay for text readability */
.course-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to top,
        rgba(10, 22, 40, 0.9) 0%,
        rgba(10, 22, 40, 0.6) 40%,
        rgba(10, 22, 40, 0.3) 100%
    );
    z-index: 2;
}

/* Hero Container */
.course-hero-container {
    position: relative;
    z-index: 3;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: center;
}

@media (min-width: 1024px) {
    .course-hero-container {
        grid-template-columns: 1fr 420px;
        gap: 56px;
    }
}

@media (min-width: 1200px) {
    .course-hero-container {
        grid-template-columns: 1fr 460px;
        gap: 64px;
    }
}

/* Hero Content (Left Side) */
.course-hero-content {
    color: #ffffff;
}

/* Hero Breadcrumb */
.course-hero-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.course-hero-breadcrumb a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    transition: color 0.2s ease;
}

.course-hero-breadcrumb a:hover {
    color: #ffffff;
}

.course-hero-breadcrumb span {
    color: rgba(255, 255, 255, 0.5);
}

/* Category Badge */
.course-hero-category {
    display: inline-block;
    padding: 5px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    margin-bottom: 16px;
    backdrop-filter: blur(4px);
}

/* Hero Title */
.course-hero-title {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
    color: #ffffff;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

@media (min-width: 768px) {
    .course-hero-title {
        font-size: 36px;
    }
}

@media (min-width: 1024px) {
    .course-hero-title {
        font-size: 40px;
    }
}

/* Hero Description */
.course-hero-description {
    font-size: 15px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    max-width: 600px;
}

@media (min-width: 768px) {
    .course-hero-description {
        font-size: 16px;
    }
}

/* Hero Meta */
.course-hero-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    margin-bottom: 16px;
}

.course-hero-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
}

.course-hero-meta-item svg {
    width: 16px;
    height: 16px;
    color: rgba(255, 255, 255, 0.7);
}

/* Hero Rating */
.course-hero-rating {
    display: flex;
    align-items: center;
    gap: 6px;
}

.course-hero-rating-value {
    font-size: 15px;
    font-weight: 600;
    color: #fbbf24;
}

.course-hero-stars {
    display: flex;
    gap: 2px;
}

.course-hero-stars svg {
    width: 14px;
    height: 14px;
}

.course-hero-stars .star-filled {
    color: #fbbf24;
}

.course-hero-stars .star-half,
.course-hero-stars .star-empty {
    color: rgba(251, 191, 36, 0.4);
}

.course-hero-rating-count {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

/* Hero Instructor */
.course-hero-instructor {
    display: flex;
    align-items: center;
    gap: 10px;
}

.course-hero-instructor-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

.course-hero-instructor-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.course-hero-instructor-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.course-hero-instructor-avatar--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
}

.course-hero-instructor-name {
    font-size: 14px;
    font-weight: 500;
    color: #ffffff;
}

/* ============================================
   Hero Card (Simplified - Video + Price + CTA)
   ============================================ */
.course-hero-card {
    background-color: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .course-hero-card {
    background-color: #111a2e;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
    border-color: #334155;
}

/* Hero Card Image */
.course-hero-card-image {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.course-hero-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Video Badge */
.course-hero-card-video-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    color: #ffffff;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.course-hero-card-video-badge svg {
    width: 12px;
    height: 12px;
}

/* Lecture Count Badge */
.course-hero-card-lecture-badge {
    position: absolute;
    bottom: 12px;
    left: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    color: #ffffff;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    border-radius: 4px;
}

/* CC Badge */
.course-hero-card-cc-badge {
    position: absolute;
    bottom: 12px;
    right: 12px;
    padding: 4px 8px;
    font-size: 10px;
    font-weight: 700;
    color: #ffffff;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    border-radius: 4px;
    text-transform: uppercase;
}

.course-hero-card-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    color: #0f172a;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    transition: all 0.25s ease;
}

.course-hero-card-play:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.course-hero-card-play svg {
    width: 24px;
    height: 24px;
    margin-left: 4px;
}

/* Hero Card CTA */
.course-hero-card-cta {
    padding: 24px;
}

.course-hero-card-price {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 20px;
}

.course-hero-card-price-current {
    font-size: 32px;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.02em;
}

[data-theme="dark"] .course-hero-card-price-current {
    color: #f1f5f9;
}

.course-hero-card-price-original {
    font-size: 16px;
    color: #94a3b8;
    text-decoration: line-through;
}

.course-hero-card-price-free {
    font-size: 32px;
    font-weight: 700;
    color: #10b981;
    letter-spacing: -0.02em;
}

.course-hero-card-btn {
    display: block;
    width: 100%;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    color: #ffffff;
    background-color: #154f95;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    text-decoration: none;
}

.course-hero-card-btn:hover {
    color: #ffffff;
}

[data-theme="dark"] .course-hero-card-btn {
    background-color: #3b82f6;
    color: #ffffff;
}

[data-theme="dark"] .course-hero-card-btn:hover {
    color: #ffffff;
}

/* Mobile: Hide card in hero */
@media (max-width: 1023px) {
    .course-hero-card {
        display: none;
    }
}

/* ============================================
   Page Layout with Sidebar
   ============================================ */
.course-detail {
    padding: 48px 16px 24px;
    min-height: 100vh;
    background-color: #ffffff;
}

[data-theme="dark"] .course-detail {
    background-color: #0c1222;
}

@media (min-width: 480px) {
    .course-detail {
        padding: 48px 24px 28px;
    }
}

@media (min-width: 768px) {
    .course-detail {
        padding: 56px 40px 32px;
    }
}

@media (min-width: 1400px) {
    .course-detail {
        padding: 64px 56px 40px;
    }
}

.course-detail-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

@media (min-width: 1024px) {
    .course-detail-container {
        grid-template-columns: 1fr 420px;
        gap: 56px;
    }
}

@media (min-width: 1200px) {
    .course-detail-container {
        grid-template-columns: 1fr 460px;
        gap: 64px;
    }
}

/* ============================================
   Sticky Sidebar
   ============================================ */
.course-sidebar {
    display: none;
}

@media (min-width: 1024px) {
    .course-sidebar {
        display: block;
    }
}

.course-sidebar-sticky {
    position: sticky;
    top: 100px;
}

/* Sidebar Card */
.course-sidebar-card {
    background-color: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .course-sidebar-card {
    background-color: #111a2e;
    border-color: #334155;
}

/* Course Stats Section */
.course-sidebar-stats {
    padding: 20px;
    border-bottom: 1px solid #e5e7eb;
}

[data-theme="dark"] .course-sidebar-stats {
    border-color: #334155;
}

.course-sidebar-stats-title {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    margin-bottom: 16px;
}

[data-theme="dark"] .course-sidebar-stats-title {
    color: #94a3b8;
}

.course-sidebar-stats-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.course-sidebar-stat {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: #374151;
}

[data-theme="dark"] .course-sidebar-stat {
    color: #d1d5db;
}

.course-sidebar-stat svg {
    width: 18px;
    height: 18px;
    color: #154f95;
    flex-shrink: 0;
}

[data-theme="dark"] .course-sidebar-stat svg {
    color: #60a5fa;
}

/* Instructor Section in Sidebar */
.course-sidebar-instructor {
    padding: 20px;
}

.course-sidebar-instructor-title {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    margin-bottom: 16px;
}

[data-theme="dark"] .course-sidebar-instructor-title {
    color: #94a3b8;
}

.course-sidebar-instructor-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.course-sidebar-instructor-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.course-sidebar-instructor-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.course-sidebar-instructor-avatar--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    font-size: 18px;
    font-weight: 600;
    color: #ffffff;
}

.course-sidebar-instructor-info {
    flex: 1;
    min-width: 0;
}

.course-sidebar-instructor-name {
    font-size: 15px;
    font-weight: 600;
    color: #0f172a;
    margin: 0 0 2px;
}

[data-theme="dark"] .course-sidebar-instructor-name {
    color: #f1f5f9;
}

.course-sidebar-instructor-location {
    font-size: 12px;
    color: #64748b;
    margin: 0;
}

[data-theme="dark"] .course-sidebar-instructor-location {
    color: #94a3b8;
}

.course-sidebar-instructor-bio {
    font-size: 13px;
    line-height: 1.5;
    color: #475569;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

[data-theme="dark"] .course-sidebar-instructor-bio {
    color: #94a3b8;
}

/* Social Links in Sidebar */
.course-sidebar-social {
    display: flex;
    gap: 8px;
    margin-top: 4px;
}

.course-sidebar-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: rgba(21, 79, 149, 0.1);
    border-radius: 6px;
    color: #154f95;
    transition: all 0.2s ease;
}

.course-sidebar-social-link:hover {
    background-color: #154f95;
    color: #ffffff;
}

[data-theme="dark"] .course-sidebar-social-link {
    background-color: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
}

[data-theme="dark"] .course-sidebar-social-link:hover {
    background-color: #3b82f6;
    color: #ffffff;
}

.course-sidebar-social-link svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Course Sections
   ============================================ */
.course-section {
    margin-bottom: 40px;
}

.course-section:last-child {
    margin-bottom: 0;
}

.course-section-title {
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #154f95 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e5e7eb;
}

[data-theme="dark"] .course-section-title {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 50%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border-color: #334155;
}

/* Course Description Content */
.course-description-content {
    font-size: 15px;
    line-height: 1.7;
    color: #475569;
}

[data-theme="dark"] .course-description-content {
    color: #94a3b8;
}

.course-description-content h3 {
    font-size: 17px;
    font-weight: 600;
    color: #0f172a;
    margin: 24px 0 12px;
}

.course-description-content h3:first-child {
    margin-top: 0;
}

[data-theme="dark"] .course-description-content h3 {
    color: #f1f5f9;
}

.course-description-content p {
    margin-bottom: 16px;
}

.course-description-content p:last-child {
    margin-bottom: 0;
}

.course-description-content ul {
    margin: 0 0 16px 0;
    padding-left: 0;
    list-style: none;
}

.course-description-content ul:last-child {
    margin-bottom: 0;
}

.course-description-content li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
}

.course-description-content li:last-child {
    margin-bottom: 0;
}

.course-description-content li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background-color: #154f95;
    border-radius: 50%;
}

[data-theme="dark"] .course-description-content li::before {
    background-color: #60a5fa;
}

/* ============================================
   Course Content Header
   ============================================ */
.course-content-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e5e7eb;
}

[data-theme="dark"] .course-content-header {
    border-color: #334155;
}

.course-content-header .course-section-title {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.course-content-stats {
    font-size: 14px;
    color: #64748b;
    display: flex;
    align-items: center;
    gap: 8px;
}

[data-theme="dark"] .course-content-stats {
    color: #94a3b8;
}

.course-content-stats-sep {
    color: #cbd5e1;
}

[data-theme="dark"] .course-content-stats-sep {
    color: #475569;
}

.course-expand-btn {
    margin-left: auto;
    padding: 0;
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    color: #154f95;
    background: none;
    border: none;
    cursor: pointer;
}

.course-expand-btn:hover {
    text-decoration: underline;
}

[data-theme="dark"] .course-expand-btn {
    color: #60a5fa;
}

/* ============================================
   Chapters Accordion
   ============================================ */
.course-chapters {
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    overflow: hidden;
}

[data-theme="dark"] .course-chapters {
    border-color: #334155;
}

.course-chapter {
    border-bottom: 1px solid #e5e7eb;
}

.course-chapter:last-child {
    border-bottom: none;
}

[data-theme="dark"] .course-chapter {
    border-color: #334155;
}

.course-chapter-header {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 14px 16px;
    font-family: inherit;
    background-color: #f8fafc;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background-color 0.2s ease;
}

.course-chapter-header:hover {
    background-color: #f1f5f9;
}

[data-theme="dark"] .course-chapter-header {
    background-color: #111a2e;
}

[data-theme="dark"] .course-chapter-header:hover {
    background-color: #1e293b;
}

.course-chapter-toggle {
    flex-shrink: 0;
}

.course-chapter-arrow {
    width: 18px;
    height: 18px;
    color: #64748b;
    transition: transform 0.2s ease;
}

.course-chapter.is-open .course-chapter-arrow {
    transform: rotate(180deg);
}

[data-theme="dark"] .course-chapter-arrow {
    color: #94a3b8;
}

.course-chapter-info {
    flex: 1;
    min-width: 0;
}

.course-chapter-title {
    font-size: 14px;
    font-weight: 500;
    color: #0f172a;
    display: block;
}

[data-theme="dark"] .course-chapter-title {
    color: #f1f5f9;
}

.course-chapter-meta {
    display: block;
    font-size: 12px;
    font-weight: 400;
    color: #64748b;
    margin-top: 2px;
}

[data-theme="dark"] .course-chapter-meta {
    color: #94a3b8;
}

/* Chapter Content (Lessons) */
.course-chapter-content {
    display: none;
    padding: 0;
    background-color: #ffffff;
}

.course-chapter.is-open .course-chapter-content {
    display: block;
}

[data-theme="dark"] .course-chapter-content {
    background-color: #0c1222;
}

.course-lessons {
    list-style: none;
    padding: 0;
    margin: 0;
}

.course-lesson {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px 12px 46px;
    border-top: 1px solid #f1f5f9;
    transition: background-color 0.2s ease;
}

.course-lesson:hover {
    background-color: #f8fafc;
}

[data-theme="dark"] .course-lesson {
    border-color: #1e293b;
}

[data-theme="dark"] .course-lesson:hover {
    background-color: #111a2e;
}

.course-lesson-icon {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: #94a3b8;
}

[data-theme="dark"] .course-lesson-icon {
    color: #64748b;
}

.course-lesson-icon svg {
    width: 100%;
    height: 100%;
}

.course-lesson-title {
    flex: 1;
    font-size: 13px;
    color: #374151;
}

[data-theme="dark"] .course-lesson-title {
    color: #d1d5db;
}

.course-lesson-preview-badge {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #059669;
    background-color: rgba(5, 150, 105, 0.1);
    padding: 3px 8px;
    border-radius: 4px;
}

[data-theme="dark"] .course-lesson-preview-badge {
    background-color: rgba(5, 150, 105, 0.15);
    color: #34d399;
}

.course-lesson-lock {
    flex-shrink: 0;
    width: 14px;
    height: 14px;
    color: #94a3b8;
}

[data-theme="dark"] .course-lesson-lock {
    color: #64748b;
}

.course-lesson-lock svg {
    width: 100%;
    height: 100%;
}

/* Clickable Preview Lessons */
.course-lesson--preview {
    cursor: pointer;
}

.course-lesson--preview:hover .course-lesson-title {
    color: #154f95;
}

[data-theme="dark"] .course-lesson--preview:hover .course-lesson-title {
    color: #60a5fa;
}

.course-lesson--preview:hover .course-lesson-preview-badge {
    background-color: rgba(5, 150, 105, 0.2);
}

/* ============================================
   Related Courses Section
   ============================================ */
.related-courses {
    padding: 24px 16px 48px;
    background-color: #ffffff;
}

[data-theme="dark"] .related-courses {
    background-color: #0c1222;
}

@media (min-width: 480px) {
    .related-courses {
        padding: 28px 24px 56px;
    }
}

@media (min-width: 768px) {
    .related-courses {
        padding: 32px 40px 64px;
    }
}

@media (min-width: 1400px) {
    .related-courses {
        padding: 40px 56px 72px;
    }
}

.related-courses-container {
    max-width: 1400px;
    margin: 0 auto;
}

.related-courses-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.related-courses-title {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #154f95 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

[data-theme="dark"] .related-courses-title {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 50%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.related-courses-link {
    font-size: 14px;
    font-weight: 500;
    color: #154f95;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s ease;
}

.related-courses-link:hover {
    color: #0d3d7a;
}

[data-theme="dark"] .related-courses-link {
    color: #60a5fa;
}

[data-theme="dark"] .related-courses-link:hover {
    color: #93c5fd;
}

.related-courses-link svg {
    width: 16px;
    height: 16px;
}

.related-courses-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 640px) {
    .related-courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .related-courses-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1200px) {
    .related-courses-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Override courses-grid within related courses to use local grid settings */
.related-courses .courses-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 640px) {
    .related-courses .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .related-courses .courses-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1200px) {
    .related-courses .courses-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Course Card - Matching Landing Page Design */
.related-course-card {
    display: flex;
    flex-direction: column;
    background-color: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    text-decoration: none;
    transition: border-radius 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.related-course-card:hover {
    border-radius: 20px;
    border-color: #cbd5e1;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .related-course-card {
    background-color: #111a2e;
    border-color: #1e293b;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .related-course-card:hover {
    border-color: #334155;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.related-course-image {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: 11px 11px 0 0;
    overflow: hidden;
    background-color: #e5e7eb;
    transition: border-radius 0.25s ease;
}

.related-course-card:hover .related-course-image {
    border-radius: 19px 19px 0 0;
}

[data-theme="dark"] .related-course-image {
    background-color: #1e293b;
}

.related-course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Category Badge - Positioned top right */
.related-course-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    color: #ffffff;
    background-color: #1e3a4c;
    border-radius: 6px;
    text-transform: capitalize;
}

[data-theme="dark"] .related-course-badge {
    background-color: #334155;
}

.related-course-content {
    display: flex;
    flex-direction: column;
    padding: 16px;
    background: #ffffff;
    border-radius: 0 0 11px 11px;
    transition: border-radius 0.25s ease;
}

.related-course-card:hover .related-course-content {
    border-radius: 0 0 19px 19px;
}

[data-theme="dark"] .related-course-content {
    background: #111a2e;
}

.related-course-category {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #154f95;
    margin-bottom: 8px;
}

[data-theme="dark"] .related-course-category {
    color: #60a5fa;
}

.related-course-title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    color: #0f172a;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

[data-theme="dark"] .related-course-title {
    color: #f1f5f9;
}

.related-course-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Rating */
.related-course-rating {
    display: flex;
    align-items: center;
    gap: 6px;
}

.related-course-rating-score {
    font-size: 14px;
    font-weight: 500;
    color: #374151;
}

[data-theme="dark"] .related-course-rating-score {
    color: #d1d5db;
}

.related-course-rating-stars {
    display: flex;
    align-items: center;
    gap: 2px;
    color: #fbbf24;
}

.related-course-rating-stars svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

/* Price */
.related-course-price {
    font-size: 16px;
    font-weight: 600;
    color: #0f172a;
}

[data-theme="dark"] .related-course-price {
    color: #f1f5f9;
}

.related-course-price--free {
    font-size: 16px;
    font-weight: 600;
    color: #10b981;
}

[data-theme="dark"] .related-course-price--free {
    color: #34d399;
}

/* ============================================
   Mobile CTA Bar
   ============================================ */
.course-mobile-cta {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 16px;
    background-color: #ffffff;
    border-top: 1px solid #e5e7eb;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
    z-index: 100;
}

[data-theme="dark"] .course-mobile-cta {
    background-color: #111a2e;
    border-color: #334155;
}

.course-mobile-cta-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    max-width: 1400px;
    margin: 0 auto;
}

.course-mobile-cta-price {
    font-size: 22px;
    font-weight: 700;
    color: #0f172a;
}

[data-theme="dark"] .course-mobile-cta-price {
    color: #f1f5f9;
}

.course-mobile-cta-price--free {
    color: #22c55e;
}

.course-mobile-cta-btn {
    flex: 1;
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    color: #ffffff;
    background-color: #154f95;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.course-mobile-cta-btn:hover {
    background-color: #0d3d7a;
    color: #ffffff;
}

[data-theme="dark"] .course-mobile-cta-btn {
    background-color: #3b82f6;
}

[data-theme="dark"] .course-mobile-cta-btn:hover {
    background-color: #2563eb;
}

@media (min-width: 1024px) {
    .course-mobile-cta {
        display: none;
    }
}

/* Padding for mobile CTA */
@media (max-width: 1023px) {
    .course-detail {
        padding-bottom: 100px;
    }
}

/* ============================================
   Video Modal
   ============================================ */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.video-modal.is-active {
    opacity: 1;
    visibility: visible;
}

.video-modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
}

.video-modal-container {
    position: relative;
    width: 100%;
    max-width: 1000px;
    background-color: #000000;
    border-radius: 12px;
    overflow: visible;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.video-modal.is-active .video-modal-container {
    transform: scale(1) translateY(0);
}

.video-modal-header {
    display: none;
}

.video-modal-title {
    display: none;
}

.video-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background-color: rgba(0, 0, 0, 0.6);
    border: none;
    border-radius: 50%;
    color: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.video-modal-close:hover {
    background-color: rgba(0, 0, 0, 0.8);
    color: #ffffff;
}

.video-modal-close svg {
    width: 20px;
    height: 20px;
}

.video-modal-body {
    position: relative;
    aspect-ratio: 16 / 9;
    background-color: #000000;
    border-radius: 12px;
    overflow: hidden;
}

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

.video-modal-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: video-modal-spin 0.8s linear infinite;
}

@keyframes video-modal-spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}