/* ========================================
   Course Detail Page Styles
   ======================================== */

.course-detail-hero {
    padding: calc(80px + var(--space-4xl)) 0 var(--space-4xl);
    background: #0f172a;
    /* Base dark color */
    background-image:
        radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.4) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(220, 38, 38, 0.3) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(37, 99, 235, 0.4) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(220, 38, 38, 0.3) 0px, transparent 50%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
    animation: mesh-bg 15s ease infinite alternate;
}

@keyframes mesh-bg {
    0% {
        background-position: 0% 0%;
    }

    100% {
        background-position: 100% 100%;
    }
}

.course-detail-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    transform: rotate(15deg);
    z-index: 0;
    pointer-events: none;
}

.course-detail-hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-3xl);
    align-items: center;
}

@media (max-width: 992px) {
    .course-detail-hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .course-hero-image {
        order: -1;
    }
}

.course-hero-content h1 {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.course-hero-content .course-tagline {
    font-size: var(--text-xl);
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

.course-meta-tags {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

@media (max-width: 992px) {
    .course-meta-tags {
        justify-content: center;
    }
}

.meta-tag {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--space-xs) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.course-hero-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    aspect-ratio: 16/10;
    border: 4px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition-base);
}

.course-hero-image:hover {
    transform: scale(1.02) translateY(-10px);
}

/* Tabs or Sections Nav */
.detail-nav {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 70px;
    z-index: 100;
}

.detail-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-2xl);
    justify-content: center;
}

.detail-nav a {
    display: block;
    padding: var(--space-lg) 0;
    color: var(--color-gray-600);
    font-weight: var(--font-medium);
    transition: all var(--transition-fast);
    border-bottom: 3px solid transparent;
}

.detail-nav a:hover,
.detail-nav a.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* Section Content Styles */
.detail-section {
    padding: var(--space-4xl) 0;
}

.syllabus-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.syllabus-item {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    gap: var(--space-xl);
    transition: all var(--transition-base);
}

.syllabus-item:hover {
    border-color: var(--color-primary-light);
    transform: translateX(10px);
}

.syllabus-number {
    width: 50px;
    height: 50px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
    font-size: var(--text-xl);
    flex-shrink: 0;
}

/* Timetable */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.schedule-table th {
    background: var(--color-gray-100);
    padding: var(--space-lg);
    text-align: left;
    color: var(--color-gray-700);
}

.schedule-table td {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-gray-100);
}

.time-slot {
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

/* Benefits */
.benefit-card {
    text-align: center;
    padding: var(--space-xl);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

/* Highlights Grid */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.highlight-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 3/4;
    max-width: 400px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.highlight-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}



.highlight-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.highlight-item:hover img {
    transform: scale(1.1);
}

/* Sidebar CTA for larger screens or Bottom fix for mobile */
@media (min-width: 993px) {
    .detail-grid {
        display: grid;
        grid-template-columns: 1fr 350px;
        gap: var(--space-3xl);
    }

    .detail-sidebar {
        position: sticky;
        top: 150px;
        align-self: start;
    }
}

.cta-box {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-200);
}

.price-display {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.price-display .old-price {
    text-decoration: line-through;
    color: var(--color-gray-400);
    font-size: var(--text-lg);
}

.price-display .current-price {
    display: block;
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-secondary);
}

/* ========================================
   Mobile Responsive - Course Detail
   ======================================== */

@media (max-width: 768px) {
    .course-detail-hero {
        padding: calc(70px + var(--space-2xl)) 0 var(--space-2xl);
    }

    .course-hero-content h1 {
        font-size: var(--text-2xl);
    }

    .course-hero-content .course-tagline {
        font-size: var(--text-base);
    }

    /* Scrollable detail nav tabs */
    .detail-nav ul {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: var(--space-lg);
        justify-content: flex-start;
        padding: 0 var(--space-md);
        white-space: nowrap;
        scrollbar-width: none;
    }

    .detail-nav ul::-webkit-scrollbar {
        display: none;
    }

    .detail-nav a {
        padding: var(--space-md) 0;
        font-size: var(--text-sm);
    }

    /* Detail sections */
    .detail-section {
        padding: var(--space-2xl) 0;
    }

    /* Syllabus items stack */
    .syllabus-item {
        flex-direction: column;
        gap: var(--space-md);
        padding: var(--space-lg);
    }

    .syllabus-item:hover {
        transform: none;
    }

    .syllabus-number {
        width: 40px;
        height: 40px;
        font-size: var(--text-lg);
    }

    /* Schedule table responsive */
    .schedule-table th,
    .schedule-table td {
        padding: var(--space-md) var(--space-sm);
        font-size: var(--text-sm);
    }

    /* CTA box */
    .cta-box {
        padding: var(--space-lg);
    }

    .price-display .current-price {
        font-size: var(--text-3xl);
    }

    /* Highlights grid */
    .highlights-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    /* Course hero image */
    .course-hero-image:hover {
        transform: none;
    }

    /* Meta tags */
    .meta-tag {
        font-size: var(--text-xs);
        padding: var(--space-xs) var(--space-md);
    }
}

@media (max-width: 480px) {
    .course-hero-content h1 {
        font-size: var(--text-xl);
    }

    .highlights-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-md);
    }
}