static/style.css

body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    overflow: hidden;
    color: white;
    background: black;

    /* CENTER THE CARD */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* 3D SPACE BACKGROUND */

#bg {
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
}

/* MAIN CARD */

.container {
    background: rgba(10, 10, 30, 0.75);
    backdrop-filter: blur(12px);
    padding: 40px;
    border-radius: 15px;
    width: 380px;

    box-shadow: 0 0 50px rgba(0, 255, 255, 0.3);

    /* FLOATING EFFECT */
    animation: float 6s ease-in-out infinite;
}

/* FLOATING ANIMATION */

@keyframes float {

    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-12px);
    }

    100% {
        transform: translateY(0px);
    }

}

/* TITLE */

.container h2 {
    text-align: center;
    margin-bottom: 20px;
    color: cyan;
}

/* INPUTS */

input,
select {
    width: 100%;
    margin: 10px 0;
    padding: 10px;

    border-radius: 6px;
    border: 1px solid #222;

    background: #0f0f20;
    color: white;
}

/* INPUT FOCUS */

input:focus,
select:focus {

    outline: none;
    border: 1px solid cyan;

}

/* BUTTON */

button {

    width: 100%;
    padding: 12px;

    border-radius: 8px;
    border: none;

    background: linear-gradient(45deg, #00ffff, #4e73df);

    color: white;
    cursor: pointer;

    font-weight: bold;

    transition: 0.3s;

}

/* BUTTON HOVER */

button:hover {

    transform: scale(1.05);

    box-shadow: 0 0 20px cyan;

}

/* QR IMAGE PREVIEW */

img {

    margin-top: 15px;

    border-radius: 10px;

    padding: 5px;

    background: white;

    display: block;

    margin-left: auto;
    margin-right: auto;

}