body {
    font-family: Arial, sans - serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #000;
    overflow: hidden;
}

#loading - screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    z - index: 1000;
}

#loading - spinner {
    border: 16px solid rgba(255, 255, 255, 0.1);
    width: 120px;
    height: 120px;
    border - radius: 50%;
    border - top - color: #00ff00;
    animation: spin 1s ease - in - out infinite;
    -webkit - animation: spin 1s ease - in - out infinite;
}

@keyframes spin {
    to {
        -webkit - transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

#content {
    text - align: center;
    color: white;
}

.hidden {
    display: none;
}

#message {
    font - size: 80px;
    color: #00ff00;
    text - shadow: 0 0 10px #00ff00, 0 0 20px #00ff00, 0 0 30px #00ff00, 0 0 40px #00ff00, 0 0 50px #00ff00, 0 0 60px #00ff00,
        0 0 70px #00ff00;
    animation: glow 1.5s ease - in - out infinite alternate;
}

@keyframes glow {
    from {
        text - shadow: 0 0 10px #00ff00, 0 0 20px #00ff00, 0 0 30px #00ff00, 0 0 40px #00ff00, 0 0 50px #00ff00, 0 0 60px #00ff00,
            0 0 70px #00ff00;
    }
    to {
        text - shadow: 0 0 20px #00ff00, 0 0 30px #00ff00, 0 0 40px #00ff00, 0 0 50px #00ff00, 0 0 60px #00ff00, 0 0 70px #00ff00,
            0 0 80px #00ff00;
    }
}