body {
    margin: 0;
    overflow: hidden;
    background-color: #000;
    font-family: Arial, sans-serif;
    /* Immersive Gradient */
    background: radial-gradient(circle at center, #1a1a1a 0%, #000000 100%);
}

/* Grain texture overlay */
body::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.05;
    z-index: 1;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

#textInput {
    font-size: 18px;
    width: 300px;
    transition: all 0.3s;
}

#textInput:focus {
    width: 350px;
}