body {
    background: linear-gradient(135deg, #cc0000 0%, #000000 70%);
    background-attachment: fixed;
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    overflow: hidden;
}

body {
    background: linear-gradient(135deg, #cc0000 0%, #000000 70%);
    background-attachment: fixed;
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    overflow: hidden;
}

.patron-estrellas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: url('tudiseño.png');
    background-size: 32px 32px;
    background-repeat: repeat;
    z-index: -1;
    animation: moverDiagonal 10s linear infinite;
}

@keyframes moverDiagonal {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 64px 64px;
    }
}

.rectangulo-blanco {
    width: 700px;
    height: 82vh;
    background-color: #ffffff;
    color: #000000;
    font-family: 'VT323', monospace;
    font-size: 22px;
    border: 3px solid #333366;
    padding: 20px;
    box-sizing: border-box;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.8);
    overflow-y: auto;
}
}

.rectangulo-blanco {
    width: 700px;
    height: 82vh;
    background-color: #ffffff;
    color: #000000;
    font-family: 'VT323', monospace;
    font-size: 22px;
    border: 3px solid #333366;
    padding: 20px;
    box-sizing: border-box;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.8);
    overflow-y: auto;
}