body {
    margin: 0;
    padding: 0;
    background: #000000;
    font-family: "Courier New", monospace;
    text-align: center;
    color: #00ffcc;

    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Título estilo pixel 8-bit */
h2 {
    margin-top: 60px;
    font-size: 40px;
    color: #00ffff;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Caja estilo panel retro */
.container {
    margin-top: 60px;
    padding: 40px 60px;
    background: #111111;
    border: 3px solid #00ff00;
}

/* Botón estilo pixel duro */
button {
    margin-top: 20px;
    padding: 12px 28px;
    font-size: 16px;
    font-family: inherit;
    color: #000000;
    background: #ffff00;
    border: 3px solid #ff0000;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background: #ff9900;
}

/* Botón secundario */
.back-btn {
    margin: 40px 0 60px 0;
    padding: 12px 28px;
    font-size: 16px;
    font-family: inherit;
    color: #000000;
    background: #00ff00;
    border: 3px solid #00ffff;
    cursor: pointer;
    font-weight: bold;
}

.back-btn:hover {
    background: #00cc88;
}