body {
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    text-align: center;
    padding: 40px;
}

h1 {
    margin-bottom: 10px;
}

.lab-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.lab-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    text-decoration: none;
    color: #333;
    box-shadow: 0 5px 15px rgba(0,0,0,0.15);
    transition: transform .3s ease, box-shadow .3s ease;
}

.lab-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.lab-card h2 {
    color: #1e90ff;
}