:root {
    --font: Arial, Helvetica, sans-serif;
    --gap: 1rem;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font);
    max-width: 800px;
    margin: 0 auto;
    padding: var(--gap);
    background: #f9f9f9;
}

h1 {
    margin-bottom: 0;
}

h2 {
    margin-top: 0.3rem;
    color: #555;
}

.card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1.2rem;
    margin-top: 1.5rem;
}

.button {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.6rem 1rem;
    background: #2c7be5;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}

.button:hover {
    background: #1a5fb4;
}

footer {
    margin-top: 3rem;
    font-size: 0.9rem;
    color: #666;
}