body {
    margin: 0;
    padding: 0;
    background: radial-gradient(circle at center, #1a0033, #000000 80%);
    font-family: "Trebuchet MS", Arial, sans-serif;
    text-align: center;
    color: #00ffff;
    overflow-x: hidden;

    /* Orden vertical */
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Título estilo neón */
h2 {
    margin-top: 60px;
    font-size: 52px;
    color: #00ffff;
    letter-spacing: 3px;
    text-transform: uppercase;
    text-shadow:
        0 0 5px #00ffff,
        0 0 10px #00ffff,
        0 0 20px #00ffff,
        0 0 40px #0088ff;
}

/* Caja estilo bloque GD */
.container {
    display: inline-block;
    margin-top: 60px;
    padding: 40px 60px;
    background: #111111;
    border: 3px solid #ff00ff;
    border-radius: 0;
    box-shadow:
        0 0 15px #ff00ff,
        0 0 30px #ff00ff inset;
}

/* Botón principal */
button {
    margin-top: 25px;
    padding: 15px 35px;
    font-size: 18px;
    font-family: inherit;
    color: #000;
    background: #00ffcc;
    border: 2px solid #00ffff;
    border-radius: 0;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    box-shadow:
        0 0 10px #00ffff,
        0 0 20px #00ffff;
    transition: 0.1s ease;
}

button:hover {
    background: #ffffff;
    box-shadow:
        0 0 15px #00ffff,
        0 0 30px #00ffff,
        0 0 60px #00ffff;
    transform: scale(1.05);
}

/* Botón Go Back (debajo de la caja) */
.back-btn {
    margin-top: 35px;
    padding: 15px 40px;
    font-size: 18px;
    font-family: inherit;
    color: #000;
    background: #ff00ff;
    border: 2px solid #ff66ff;
    border-radius: 0;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    box-shadow:
        0 0 10px #ff00ff,
        0 0 25px #ff00ff;
    transition: 0.1s ease;
}

.back-btn:hover {
    background: #ffffff;
    box-shadow:
        0 0 15px #ff00ff,
        0 0 40px #ff00ff,
        0 0 80px #ff00ff;
    transform: scale(1.05);
}