/* ========================================
   AI Course Pages - Styles
   ======================================== */

/* Course Hero */
.course-hero {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.course-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.course-hero .container {
    position: relative;
    text-align: center;
    max-width: 900px;
}

.course-hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.course-hero h1 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.course-hero p {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.course-hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.course-hero-stat {
    text-align: center;
}

.course-hero-stat .number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
}

.course-hero-stat .label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.course-cta-group {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-2xl);
    background: white;
    color: var(--primary);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}

.btn-primary:hover {
    background: var(--text-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-2xl);
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-lg);
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    color: white;
    transform: translateY(-2px);
}

/* Course Categories Grid */
.course-categories {
    padding: var(--spacing-3xl) 0;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.course-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
    display: block;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--shadow-lg);
    border-color: var(--primary);
}

.course-card-icon {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.course-card-content {
    padding: var(--spacing-lg);
}

.course-card-badge {
    display: inline-block;
    background: var(--primary-light);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.course-card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.course-card:hover .course-card-title {
    color: var(--primary);
}

.course-card-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.course-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.course-card-link {
    color: var(--primary);
    font-weight: 600;
}

/* Trainer Section */
.trainer-section {
    background: var(--background-alt);
    padding: var(--spacing-3xl) 0;
}

.trainer-card {
    display: flex;
    gap: var(--spacing-2xl);
    max-width: 900px;
    margin: 0 auto;
    align-items: center;
}

.trainer-avatar {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-2xl);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    flex-shrink: 0;
    box-shadow: 0 12px 40px var(--shadow-lg);
    overflow: hidden;
}

.trainer-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.trainer-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.trainer-title {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
}

.trainer-info p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.trainer-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.trainer-highlight {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding: var(--spacing-sm) 0;
}

.trainer-highlight .icon {
    font-size: 1.2rem;
}

/* Course Features */
.course-features {
    padding: var(--spacing-3xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px var(--shadow);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

/* Topics List Section */
.topics-section {
    background: var(--background-alt);
    padding: var(--spacing-3xl) 0;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.topic-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.topic-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 15px var(--shadow);
}

.topic-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.topic-content h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.topic-content p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Contact / CTA Section */
.course-cta-section {
    background: var(--gradient-secondary);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    color: white;
}

.course-cta-section h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.course-cta-section p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: white;
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.contact-email:hover {
    background: rgba(255, 255, 255, 0.3);
    color: white;
    transform: translateY(-2px);
}

.course-cta-note {
    font-size: var(--font-size-sm);
    opacity: 0.7;
}

/* Course Detail Pages */
.course-detail-hero {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.course-detail-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.course-detail-hero .container {
    position: relative;
    max-width: 900px;
}

.course-detail-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.course-detail-content .article-body h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    border-left: 4px solid var(--primary);
    padding-left: var(--spacing-md);
}

.course-detail-content .article-body h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.course-detail-content .article-body p {
    margin-bottom: var(--spacing-lg);
    line-height: 1.9;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.course-detail-content .article-body ul,
.course-detail-content .article-body ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.course-detail-content .article-body li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
    color: var(--text-secondary);
    list-style: disc;
}

.course-detail-content .article-body ol li {
    list-style: decimal;
}

/* Curriculum Section */
.curriculum-section {
    margin: var(--spacing-2xl) 0;
}

.curriculum-module {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.curriculum-module:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 15px var(--shadow);
}

.module-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.module-number {
    background: var(--gradient-primary);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.module-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.module-topics {
    padding-left: calc(40px + var(--spacing-md));
}

.module-topics li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    position: relative;
    padding-left: var(--spacing-lg);
    list-style: none !important;
}

.module-topics li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* FAQ Section */
.faq-section {
    margin: var(--spacing-2xl) 0;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-lg);
    font-weight: 600;
    color: var(--text-primary);
    background: var(--surface);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Responsive */
@media (max-width: 1024px) {
    .course-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .course-hero h1 {
        font-size: var(--font-size-3xl);
    }

    .course-hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

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

    .trainer-card {
        flex-direction: column;
        text-align: center;
    }

    .trainer-highlights {
        grid-template-columns: 1fr;
    }

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

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

    .course-cta-group {
        flex-direction: column;
        align-items: center;
    }

    .article-title {
        font-size: var(--font-size-2xl);
    }
}