/* ====================================
   COURS PAGE - ADDITIONAL STYLES
   ==================================== */

/* Course Header */
.course-header {
    padding: calc(100px + var(--spacing-xl)) 0 var(--spacing-xl);
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid rgba(0, 240, 255, 0.1);
}

.course-header-content {
    max-width: 800px;
}

.course-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--neon-cyan);
    border-radius: var(--radius-xl);
    color: var(--neon-cyan);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.course-header h1 {
    margin-bottom: var(--spacing-sm);
}

.course-header>.container>div>p {
    color: var(--text-secondary);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
}

/* Global Progress */
.global-progress {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.global-progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.global-progress-text {
    color: var(--neon-cyan);
}

/* Course Content */
.course-content {
    padding: var(--spacing-xl) 0;
}

/* Part Section */
.part-section {
    margin-bottom: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
    transition: var(--transition-normal);
}

.part-section:hover {
    border-color: rgba(0, 240, 255, 0.2);
}

/* Part Header */
.part-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition-normal);
}

.part-header:hover {
    background: rgba(255, 255, 255, 0.02);
}

.part-info {
    flex: 1;
}

.part-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.part-badge.part-1 {
    background: var(--neon-cyan);
    color: var(--bg-primary);
}

.part-badge.part-2 {
    background: var(--neon-purple);
    color: var(--bg-primary);
}

.part-badge.part-3 {
    background: var(--neon-green);
    color: var(--bg-primary);
}

.part-badge.part-4 {
    background: var(--neon-orange);
    color: var(--bg-primary);
}

.part-badge.part-5 {
    background: var(--neon-pink);
    color: var(--bg-primary);
}

.part-header h2 {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.part-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.part-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-muted);
}

.expand-icon {
    font-size: 0.75rem;
    transition: var(--transition-normal);
}

/* Part Content */
.part-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    max-height: 10000px;
    /* Increased for large modules */
    overflow: hidden;
    transition: max-height 1s ease, padding 0.5s ease;
}

.part-content.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
}

/* Module Card */
.module-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.module-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.module-lessons {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

/* Lessons List */
.lessons-list {
    list-style: none;
    padding: 0;
}

.lesson {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    transition: var(--transition-fast);
}

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

.lesson:hover {
    background: rgba(0, 240, 255, 0.05);
}

/* Custom Checkbox */
.lesson-checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border: 2px solid var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    position: relative;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.lesson-checkbox:hover {
    border-color: var(--neon-cyan);
}

.lesson-checkbox:checked {
    background: var(--neon-green);
    border-color: var(--neon-green);
}

.lesson-checkbox:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--bg-primary);
    font-size: 14px;
    font-weight: bold;
}

.lesson a {
    color: var(--text-secondary);
    flex: 1;
}

.lesson:hover a {
    color: var(--text-primary);
}

.lesson-checkbox:checked+a {
    color: var(--neon-green);
    text-decoration: line-through;
    opacity: 0.7;
}

/* Notification Toast */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--neon-green);
    border-radius: var(--radius-md);
    color: var(--neon-green);
    font-weight: 500;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition-normal);
    z-index: 9999;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .part-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .part-stats {
        width: 100%;
        justify-content: space-between;
    }

    .module-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .lesson {
        padding: var(--spacing-sm);
    }
}