/* ========================================
   FORMATION PAGE STYLES
   ======================================== */

/* Page Header */
.page-header {
    padding: 8rem var(--spacing-lg) var(--spacing-2xl);
    text-align: center;
    background: var(--bg-secondary);
}

.page-header .section-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.page-header .section-badge svg {
    width: 14px;
    height: 14px;
}

.page-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Tabs */
.tabs-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 65px;
    z-index: var(--z-sticky);
}

.tabs-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--color-primary-light);
    color: var(--color-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.tab-btn svg {
    width: 18px;
    height: 18px;
}

/* Tab Panels */
.formation-main {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* Playlist Section */
.playlist-section {
    margin-bottom: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--border-color);
}

.playlist-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.playlist-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.playlist-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.playlist-icon {
    font-size: 1.5rem;
}

.playlist-description {
    color: var(--text-secondary);
    max-width: 500px;
}

/* Videos Grid */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.video-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.video-thumbnail {
    position: relative;
    padding-top: 56.25%;
    /* 16:9 */
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-placeholder svg {
    width: 48px;
    height: 48px;
    color: white;
    opacity: 0.7;
    transition: all var(--transition-fast);
}

.video-card:hover .video-placeholder svg {
    opacity: 1;
    transform: scale(1.1);
}

.video-duration {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    background: rgba(0, 0, 0, 0.7);
    border-radius: var(--radius-sm);
}

.video-content {
    padding: var(--spacing-md);
}

.video-title {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.video-meta {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* Channels List */
.channels-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.channel-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    color: var(--text-primary);
    min-width: 280px;
}

.channel-card:hover {
    background: var(--bg-secondary);
    border-color: var(--color-primary-light);
    color: var(--color-primary);
}

.channel-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
    border-radius: var(--radius-full);
}

.channel-info {
    flex-grow: 1;
}

.channel-name {
    font-size: 1rem;
    font-weight: 600;
}

.channel-description {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.channel-card svg {
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
}

/* Courses Section */
.courses-section {
    margin-bottom: var(--spacing-3xl);
}

.section-subtitle {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.course-card {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.course-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.course-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.course-platform {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
}

.course-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.course-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    flex-grow: 1;
    margin-bottom: var(--spacing-lg);
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.course-meta span {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

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

.course-btn {
    width: 100%;
    justify-content: center;
}

/* Articles Section */
.articles-section {
    margin-bottom: var(--spacing-3xl);
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.article-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.article-card:hover {
    background: var(--bg-secondary);
    border-color: var(--color-primary-light);
}

.article-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.article-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.article-content {
    flex-grow: 1;
}

.article-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.article-source {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-xs);
}

.article-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.article-btn {
    flex-shrink: 0;
}

/* Tags */
.tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

.tag-green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.tag-orange {
    background: rgba(249, 115, 22, 0.1);
    color: var(--color-accent);
}

/* Responsive */
@media (max-width: 768px) {
    .playlist-header {
        flex-direction: column;
    }

    .tabs-bar {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--spacing-sm);
    }

    .tab-btn {
        flex-shrink: 0;
    }

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

    .article-btn {
        width: 100%;
    }
}