/* Reset minimal default margins */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: system-ui, sans-serif;
}

/* Center the container */
.button-container {
    display: flex;
    flex-wrap: wrap;          /* allows more buttons on small screens */
    justify-content: center;  /* horizontal centering */
    align-items: center;      /* vertical centering */
    min-height: 100vh;        /* full‑height page */
    gap: 1rem;                /* space between buttons */
    background: #f9f9f9;      /* optional light background */
}

/* Button appearance */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #007BFF;
    color: #fff;
    text-decoration: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: background 0.2s ease, transform 0.1s;
}

.btn:hover,
.btn:focus {
    background: #0056b3;
    outline: none;
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

/* Small‑screen tweaks (optional) */
@media (max-width: 480px) {
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
}