/* ---- foundation ---- */
* {
    box-sizing: border-box;
}

body {
    font-family: monospace;
    background: #ffffff;
    color: #000000;
    max-width: 720px;
    margin: 0 auto;
    padding: 1rem;
    line-height: 1.5;
}

/* ---- headings ---- */
h1 {
    border-bottom: 4px solid #000;
    padding-bottom: 0.5rem;
    text-transform: uppercase;
}

h2 {
    text-transform: uppercase;
    margin-top: 2.5rem;
}

/* ---- cards ---- */
.card {
    border: 2px solid #000;
    padding: 1rem;
    margin-bottom: 1rem;
}

.card h3 {
    margin: 0 0 0.5rem 0;
}

.card p {
    margin: 0.25rem 0;
}

/* ---- links ---- */
a {
    color: #000;
    background: #ffff00;
    font-weight: bold;
    padding: 0.1rem 0.3rem;
}

a:hover {
    background: #000;
    color: #ffff00;
}

/* ---- responsive grid ---- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}