/**
 * Simple LMS - Frontend Styles
 * File: assets/css/frontend.css
 */

/* Variables */
:root {
    --slms-primary: #4a90e2;
    --slms-secondary: #6c757d;
    --slms-success: #28a745;
    --slms-danger: #dc3545;
    --slms-warning: #ffc107;
    --slms-info: #17a2b8;
    --slms-light: #f8f9fa;
    --slms-dark: #343a40;
    --slms-border: #dee2e6;
    --slms-shadow: 0 0.125rem 0.25rem rgba(0,0,0,0.075);
}

/* General Styles */
.slms-button {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.slms-button.primary {
    background-color: var(--slms-primary);
    color: white;
}

.slms-button.primary:hover {
    background-color: #3a7bc8;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.3);
}

.slms-button.secondary {
    background-color: var(--slms-secondary);
    color: white;
}

.slms-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Course Grid */
.slms-course-grid {
    display: grid;
    gap: 30px;
    margin: 30px 0;
}

.slms-course-grid.columns-2 {
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
}

.slms-course-grid.columns-3 {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.slms-course-grid.columns-4 {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.slms-course-item {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--slms-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.slms-course-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.slms-course-item .course-thumbnail {
    position: relative;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    overflow: hidden;
    background: var(--slms-light);
}

.slms-course-item .course-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slms-course-item .course-content {
    padding: 20px;
}

.slms-course-item .course-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 10px 0;
}

.slms-course-item .course-title a {
    color: var(--slms-dark);
    text-decoration: none;
    transition: color 0.3s ease;
}

.slms-course-item .course-title a:hover {
    color: var(--slms-primary);
}

.slms-course-item .course-excerpt {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 15px;
}

.slms-course-item .course-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--slms-primary);
    margin-bottom: 15px;
}

/* Single Course */
.slms-single-course {
    background: var(--slms-light);
    min-height: 100vh;
}

.slms-single-course .course-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 0;
}

.slms-single-course .breadcrumb {
    background: none;
    padding: 0;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.8);
}

.slms-single-course .breadcrumb a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
}

.slms-single-course .breadcrumb a:hover {
    color: white;
}

.slms-single-course .course-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
}

.slms-single-course .course-meta {
    display: flex;
    gap: 25px;
    margin-bottom: 20px;
}

.slms-single-course .meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.slms-single-course .meta-item .dashicons {
    font-size: 20px;
    width: 20px;
    height: 20px;
}

.slms-single-course .tutor-info {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 30px;
}

.slms-single-course .tutor-info img {
    border-radius: 50%;
    border: 3px solid rgba(255,255,255,0.3);
}

.slms-single-course .tutor-details {
    display: flex;
    flex-direction: column;
}

.slms-single-course .tutor-label {
    font-size: 14px;
    opacity: 0.8;
}

.slms-single-course .tutor-name {
    font-size: 18px;
    font-weight: 600;
}

/* Course Sidebar */
.course-sidebar {
    margin-top: -200px;
    position: sticky;
    top: 20px;
}

.course-action-box {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.enrollment-box .price-display {
    text-align: center;
    margin-bottom: 20px;
}

.enrollment-box .regular-price {
    font-size: 36px;
    font-weight: 700;
    color: var(--slms-primary);
}

.enrollment-box .original-price {
    font-size: 24px;
    color: #999;
    text-decoration: line-through;
    margin-right: 10px;
}

.enrollment-box .sale-price {
    font-size: 36px;
    font-weight: 700;
    color: var(--slms-danger);
}

.enrollment-box .free-label {
    font-size: 32px;
    font-weight: 700;
    color: var(--slms-success);
}

.course-features {
    margin-top: 30px;
}

.course-features h4 {
    font-size: 18px;
    margin-bottom: 15px;
}

.course-features ul {
    list-style: none;
    padding: 0;
}

.course-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--slms-border);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.course-features .dashicons {
    color: var(--slms-primary);
}

/* Progress Bar */
.progress-container {
    margin: 20px 0;
}

.progress-label {
    font-size: 14px;
    margin-bottom: 8px;
    color: #666;
}

.progress-bar {
    background: var(--slms-light);
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 5px;
    transition: width 0.3s ease;
}

/* Course Tabs */
.course-tabs {
    background: white;
    border-radius: 10px;
    padding: 30px;
    margin-top: 30px;
}

.nav-tabs {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0 0 30px 0;
    border-bottom: 2px solid var(--slms-border);
}

.nav-tabs li {
    margin-right: 30px;
}

.nav-tabs a {
    display: block;
    padding: 10px 0;
    color: #666;
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.nav-tabs li.active a {
    color: var(--slms-primary);
}

.nav-tabs li.active a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--slms-primary);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Lessons List */
.lessons-list {
    margin-top: 20px;
}

.lesson-item {
    display: flex;
    align-items: center;
    padding: 20px;
    background: var(--slms-light);
    border-radius: 8px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.lesson-item:hover {
    background: white;
    box-shadow: var(--slms-shadow);
}

.lesson-item.completed {
    background: #e8f5e9;
}

.lesson-item.locked {
    opacity: 0.6;
}

.lesson-number {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--slms-primary);
    margin-right: 20px;
    flex-shrink: 0;
}

.lesson-item.completed .lesson-number {
    background: var(--slms-success);
    color: white;
}

.lesson-content {
    flex: 1;
}

.lesson-title {
    font-size: 18px;
    margin: 0 0 5px 0;
}

.lesson-title a {
    color: var(--slms-dark);
    text-decoration: none;
}

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

.lesson-excerpt {
    color: #666;
    font-size: 14px;
    margin: 5px 0;
}

.lesson-duration {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #999;
    font-size: 14px;
}

/* Student Dashboard */
.slms-dashboard {
    padding: 30px 0;
}

.dashboard-header {
    background: white;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: var(--slms-shadow);
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-card {
    background: var(--slms-light);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.stat-card .stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--slms-primary);
}

.stat-card .stat-label {
    color: #666;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* My Courses */
.my-courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.my-course-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--slms-shadow);
    transition: transform 0.3s ease;
}

.my-course-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.my-course-card .course-progress {
    margin: 15px 0;
}

/* Responsive */
@media (max-width: 991px) {
    .slms-single-course .course-sidebar {
        margin-top: 30px;
        position: static;
    }
    
    .slms-course-grid.columns-3,
    .slms-course-grid.columns-4 {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 767px) {
    .slms-single-course .course-title {
        font-size: 28px;
    }
    
    .slms-single-course .course-meta {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .nav-tabs {
        flex-wrap: wrap;
    }
    
    .slms-course-grid {
        grid-template-columns: 1fr;
    }
}