* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.header p {
    color: #666;
}

.nav-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.nav-tab {
    padding: 12px 24px;
    background: white;
    border: 2px solid #ddd;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.3s;
}

.nav-tab:hover {
    border-color: #007bff;
    color: #007bff;
}

.nav-tab.active {
    background: #007bff;
    border-color: #007bff;
    color: white;
}

.search-bar {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.search-bar form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.search-bar input[type="text"],
.search-bar select {
    flex: 1;
    min-width: 200px;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.search-bar input[type="text"]:focus,
.search-bar select:focus {
    outline: none;
    border-color: #007bff;
}

.btn {
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    display: inline-block;
    transition: background 0.3s;
}

.btn:hover {
    background: #0056b3;
}

.btn-secondary {
    background: #6c757d;
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.content {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

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

.card-body {
    padding: 15px;
}

.card-body h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

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

.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
}

.table tr:hover {
    background: #f8f9fa;
}

.thumb-img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
}

.pagination a:hover {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

.pagination span.active {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

.footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #666;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .nav-tabs {
        flex-direction: column;
    }
    
    .search-bar form {
        flex-direction: column;
    }
    
    .search-bar input[type="text"],
    .search-bar select {
        width: 100%;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th,
    .table td {
        padding: 8px;
    }
}