:root {
    color-scheme: dark;
    font-family: system-ui, sans-serif;
    background: #111827;
    color: #f9fafb;
}

main {
    width: min(64rem, calc(100% - 2rem));
    margin: 3rem auto;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
    gap: 1rem;
}

.card {
    padding: 1rem;
    border: 1px solid #374151;
    border-radius: .75rem;
    background: #1f2937;
}

button {
    margin-top: 1rem;
    padding: .7rem 1rem;
    border: 0;
    border-radius: .4rem;
    background: #22d3ee;
    color: #083344;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}