body {
    font-family: Arial, sans-serif;
    background: #f3f4f6;
    text-align: center;
    padding: 20px;
}

h1 {
    margin-bottom: 4px;
}

.author {
    color: #6b7280;
    margin-bottom: 28px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
    max-width: 640px;
    margin: 0 auto;
}

.lab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 12px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    color: #1f2937;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s;
}

.lab:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
}

.num {
    width: 48px;
    height: 48px;
    line-height: 48px;
    border-radius: 50%;
    background: #2563eb;
    color: #fff;
    font-size: 22px;
    font-weight: bold;
}