:root {
    --primary-color: #2196F3;
    --secondary-color: #4CAF50;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-color: #333333;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary-color: #1976D2;
    --secondary-color: #388E3C;
    --background-color: #1a1a1a;
    --card-background: #2d2d2d;
    --text-color: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', Arial, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    transition: var(--transition);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background-color: var(--card-background);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary-color);
}

.logo img {
    height: 40px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 24px;
    padding: 5px;
}

/* Filters */
.filters {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
}

.search-input {
    width: 100%;
    padding: 12px 12px 12px 35px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 14px;
    background-color: var(--card-background);
    color: var(--text-color);
}

.category-select {
    min-width: 200px;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 14px;
    background-color: var(--card-background);
    color: var(--text-color);
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

/* Card */
.card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: var(--transition);
    position: relative;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.favorite-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.5);
    border: none;
    color: white;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.favorite-btn:hover {
    background: rgba(0,0,0,0.8);
}

.favorite-btn.active {
    color: #ff4081;
}

.card-content {
    padding: 15px;
}

.card-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--text-color);
}

.card-category {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #666;
    font-size: 14px;
    margin-bottom: 15px;
}

.card-actions {
    display: flex;
    gap: 10px;
}

.btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: #1565C0;
}

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

.btn-secondary:hover {
    background-color: #2E7D32;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 1000;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
    margin: 40px auto;
    background: var(--card-background);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.modal-header {
    padding: 15px 20px;
    background: var(--primary-color);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 5px;
}

.modal-body {
    padding: 20px;
}

#videoPlayer {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.page-btn {
    padding: 8px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    background: var(--card-background);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover:not(.active) {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

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

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-color);
}

.loading i {
    animation: spin 1s linear infinite;
    font-size: 24px;
    margin-bottom: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .header-top {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .filters {
        flex-direction: column;
    }

    .search-box, .category-select {
        width: 100%;
    }

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

    .modal-content {
        width: 95%;
        margin: 20px auto;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease-in;
}