body {
    font-family: Arial, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    text-align: center;
    padding: 5vh 5vw;
    margin: 0;
}

.container {
    box-sizing: border-box; /* include padding in width */
    width: 100%;
    max-width: 600px;
    margin: auto;
    background-color: white;
    padding: 5vw 5vw;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #c0392b;
}

.nav {
    padding: 0 10px;
}

.nav a {
    display: inline-block;
    margin: 1rem 1rem;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    background-color: #c0392b;
    color: white;
    border-radius: 6px;
    transition: background-color 0.3s ease;
    font-size: 1rem;
}

.nav a:hover {
    background-color: #e74c3c;
}

@media (max-width: 480px) {
    .nav a {
        display: block;
        width: 100%;          /* full width inside container */
        box-sizing: border-box;
        margin: 0.5rem 0;
        padding: 0.75rem 0;    /* reduce horizontal padding */
        font-size: 1.1rem;
    }
}