/* ========================================
   Course Landing Page Styles - FIXED LAYOUT
   ======================================== */

/* Course Hero */
.course-hero {
    padding: calc(var(--nav-height) + 40px) 0 60px;
    background: linear-gradient(180deg, rgba(0, 212, 255, 0.05) 0%, transparent 100%);
}

.course-hero-inner {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 60px;
    align-items: start;
    max-width: 1100px;
    margin: 0 auto;
}

.course-hero-content {
    min-width: 0;
}

.course-hero-image {
    position: sticky;
    top: calc(var(--nav-height) + 20px);
    width: 100%;
    max-width: 380px;
}

.course-hero-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.course-hero-thumb {
    height: 200px;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

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

.course-hero-thumb svg {
    width: 100px;
    height: 100px;
    color: var(--primary);
}

.course-hero-card-content {
    padding: 24px;
}

.course-hero-pricing {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 8px;
}

.course-hero-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-white);
    font-family: var(--font-mono);
}

.course-hero-original-price {
    font-size: 1.25rem;
    color: var(--text-dim);
    text-decoration: line-through;
}

.course-hero-sale-badge {
    background: var(--sale);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.course-hero-sale-ends {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.course-hero-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.course-hero-includes {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.course-hero-includes h4 {
    font-size: 0.9rem;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.course-hero-includes ul {
    list-style: none;
}

.course-hero-includes li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.course-hero-includes li svg {
    width: 16px;
    height: 16px;
    color: var(--success);
    flex-shrink: 0;
    margin-top: 2px;
}

/* Course Title Section */
.course-discipline {
    font-size: 0.85rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.course-title {
    font-size: 2.5rem;
    margin-bottom: 12px;
    line-height: 1.2;
}

.course-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.course-meta-row {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.course-meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.course-meta-item svg {
    width: 18px;
    height: 18px;
    color: var(--primary);
}

.course-instructor-note {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 24px;
}

.course-instructor-note p {
    font-style: italic;
    color: var(--text-muted);
    margin: 0;
    font-size: 0.95rem;
}

/* What You'll Learn */
.course-outcomes {
    padding: 60px 0;
    border-bottom: 1px solid var(--border-color);
}

.course-outcomes h2 {
    margin-bottom: 32px;
}

.outcomes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 1100px;
}

.outcome-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: 8px;
}

.outcome-item svg {
    width: 20px;
    height: 20px;
    color: var(--success);
    flex-shrink: 0;
    margin-top: 2px;
}

.outcome-item span {
    color: var(--text-light);
}

/* Course Content */
.course-content-section {
    padding: 60px 0;
    border-bottom: 1px solid var(--border-color);
}

.course-content-section h2 {
    margin-bottom: 32px;
}

.course-content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    max-width: 1100px;
}

.course-content-stats {
    display: flex;
    gap: 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Module Accordion (Course Page) */
.course-modules {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    max-width: 1100px;
}

.course-module {
    border-bottom: 1px solid var(--border-color);
}

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

.course-module-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.course-module-header:hover {
    background: var(--bg-card-hover);
}

.course-module-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-glow);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.course-module-icon svg {
    width: 20px;
    height: 20px;
}

.course-module-info {
    flex: 1;
}

.course-module-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.course-module-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.course-module-toggle {
    color: var(--text-dim);
    transition: transform var(--transition-fast);
}

.course-module-toggle svg {
    width: 20px;
    height: 20px;
}

.course-module.active .course-module-toggle {
    transform: rotate(180deg);
}

.course-module-lessons {
    display: none;
    background: var(--bg-dark);
}

.course-module.active .course-module-lessons {
    display: block;
}

.course-lesson-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px 14px 80px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-muted);
}

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

.course-lesson-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.course-lesson-icon svg {
    width: 18px;
    height: 18px;
}

.course-lesson-icon.free {
    color: var(--success);
}

.course-lesson-icon.locked {
    color: var(--text-dim);
}

.course-lesson-title {
    flex: 1;
}

.course-lesson-badges {
    display: flex;
    gap: 8px;
}

.course-lesson-duration {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Requirements & Audience */
.course-requirements {
    padding: 60px 0;
    border-bottom: 1px solid var(--border-color);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
    max-width: 1100px;
}

.requirements-section h3 {
    font-size: 1.25rem;
    margin-bottom: 20px;
}

.requirements-section ul {
    list-style: none;
}

.requirements-section li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-light);
}

.requirements-section li svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 2px;
}

.requirements-section li svg.check {
    color: var(--success);
}

.requirements-section li svg.arrow {
    color: var(--primary);
}

/* Related Products */
.course-related {
    padding: 60px 0;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.related-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.related-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.related-card-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-glow);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--primary);
}

.related-card-icon svg {
    width: 28px;
    height: 28px;
}

.related-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.related-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* Guarantee */
.course-guarantee {
    background: var(--bg-card);
    border: 2px solid var(--success);
    border-radius: 12px;
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    margin: 60px auto;
    max-width: 1100px;
}

.course-guarantee-icon {
    width: 80px;
    height: 80px;
    background: var(--success-glow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.course-guarantee-icon svg {
    width: 40px;
    height: 40px;
    color: var(--success);
}

.course-guarantee h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.course-guarantee p {
    color: var(--text-muted);
    margin: 0;
}

/* Responsive */
@media (max-width: 1100px) {
    .course-hero-inner {
        grid-template-columns: 1fr;
    }

    .course-hero-content {
        padding-right: 0;
    }

    .course-hero-image {
        position: static;
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .course-title {
        font-size: 1.75rem;
    }

    .outcomes-grid {
        grid-template-columns: 1fr;
    }

    .requirements-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    .course-guarantee {
        flex-direction: column;
        text-align: center;
    }

    .course-lesson-item {
        padding-left: 24px;
    }
}