body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f5f5f5;
}

header {
    background: #2c2c2c;
    color: #fff;
    padding: 25px;
    text-align: center;
}

.intro {
    max-width: 720px;
    margin: 10px auto;
}

input, select {
    padding: 10px;
    margin: 10px;
    width: 230px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    padding: 20px;
}

.card {
    background: #fff;
    padding: 18px;
    border-radius: 8px;
    text-align: center;
}

.card a {
    text-decoration: none;
    color: #222;
    font-weight: bold;
}

footer {
    background: #111;
    color: #ccc;
    padding: 25px;
    text-align: center;
    margin-top: 40px;
}

footer a {
    color: #fff;
    text-decoration: none;
    margin: 0 6px;
}

.back {
    display: block;
    margin: 20px;
}