style.css

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
    box-sizing: border-box;
}

h1 {
    font-size: 16px;
    margin: 0;
    padding: 1rem;
}

p {
    color: rgb(107, 114, 128);
    font-size: 15px;
    margin: 0.5rem 1rem;
}

.card {
    max-width: 620px;
    margin: 1rem auto;
    padding: 16px;
    border: 1px solid lightgray;
    border-radius: 16px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card p:last-child {
    margin-bottom: 0;
}