html, body {
    margin: 0;
    padding: 0;
    overflow: hidden; /* BLOQUEA EL SCROLL */
    height: 100%;
}

.box {
    position: relative;
    width: 100%;
    height: 720px; /* ajusta según tu ASCII */
    overflow: hidden; /* evita scroll interno */
}

.retro-form input,
.retro-form select {
    position: absolute;
    background: black;
    color: #00ff00;
    border: none;
    font-family: monospace;
    font-size: 16px;
}

/* Ajustado para tu layout real */
.f-fecha        { top: 85px; left: 90px; width: 150px; }
.f-tipo         { top: 115px; left: 160px; width: 260px; }
.f-empresa      { top: 140px; left: 110px; width: 300px; }
.f-direccion    { top: 170px; left: 110px; width: 480px; }
.f-telefono     { top: 200px; left: 110px; width: 200px; }

.f-marca        { top: 225px; left: 110px; width: 300px; }
.f-modelo       { top: 250px; left: 110px; width: 300px; }

.f-precio       { top: 283px; left: 110px; width: 150px; }
.f-garantia     { top: 310px; left: 160px; width: 150px; }

.f-fin-garantia { top: 337px; left: 130px; width: 150px; }
.f-num-serie    { top: 365px; left: 170px; width: 300px; }

.btn-guardar {
    position: absolute;
    top: 310px;
    left: 180px;
    background: #003300;
    color: #00ff00;
    border: 1px solid #00ff00;
    padding: 5px 15px;
    font-family: monospace;
}