body {
    font-family: Arial, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
}
.header {
    text-align: center;
    margin-bottom: 40px;
}
.header h1 {
    color: #2196f3;
    margin-bottom: 10px;
}
.header p {
    color: #666;
    font-size: 1.1em;
}
.category {
    margin-bottom: 40px;
}
.category h2 {
    color: #333;
    border-bottom: 2px solid #2196f3;
    padding-bottom: 10px;
    margin-bottom: 20px;
}
.exam-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}
.exam-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}
.exam-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}
.exam-card h3 {
    margin: 0 0 10px 0;
    color: #2196f3;
}
.exam-card p {
    margin: 5px 0;
    color: #666;
}
.btn {
    display: inline-block;
    background-color: #2196f3;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 4px;
    margin-top: 15px;
    transition: background-color 0.2s;
}
.btn:hover {
    background-color: #1976d2;
}
.stats {
    font-size: 0.9em;
    color: #888;
}
.footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #666;
    border-top: 1px solid #ddd;
}