body {
    overflow: hidden;
    margin: 0;
}

#overlay {
    background: #7f7f7fff;
    transition: 2s ease;
    pointer-events: none;
    position: fixed;
    width: 100vw;
    height: 100vw;
    top: 0;
    left: 0;
}

#sky {
    background: linear-gradient(to top, #007fff 50%, #00007f);
    width: 100vw;
    height: 100vh;
}
#water {
    background: linear-gradient(to top, #00ffff, #007fcf);
    width: 100vw;
    height: 60vh;
    position: fixed;
    bottom: 0;
}
#land {
    --width: 101vw;
    --height: 100px;
    width: var(--width);
    height: var(--height);
    position: fixed;
    bottom: 0;
    left: calc((var(--width) - 100vw) * -0.5);
    border-radius: 33% 33% 0 0 / 50px 50px 0 0;
    background: linear-gradient(to top, #006600, #009900);
    display: flex;
    justify-content: center;
}

.message {
    position: fixed;
    animation: scrolling var(--duration) forwards linear;
    color: white;
    font-family: Arial, sans-serif;
    cursor: default;
    user-select: none;
}

#leave {
    position: fixed;
    bottom: 10px;
    display: block;
    cursor: pointer;
    color: white;
}

@keyframes scrolling {
    from {
        transform: translateX(var(--start)); 
    }
    to {
        transform: translateX(100vw);
    }
}