body {
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    margin: 0;
    padding: 20px;
}

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

h1 {
    text-align: center;
}

.grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    flex: 1;
    min-width: 220px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    text-align: center;
}

.card h3 {
    margin-top: 0;
}

.card div {
    font-size: 2rem;
    font-weight: bold;
    color: #0077cc;
}

.footer {
    text-align: center;
    margin-top: 30px;
    color: #666;
}