body {
    padding: 0;
    margin: 0;
    display: flex;
    gap: 20px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100dvh; /* vh is 100% of the viewport height, dvh is good for phones */
    font-family: Arial, sans-serif;
    background: #222;
}

body.centered {
    justify-content: center;
}

body.fullscreen {
    justify-content: normal;
}

h1 {
    cursor: alias;
    color: #f3f3f3;
    font-size: 2em;
    margin: 0;
}

p {
    cursor: not-allowed;
    color: #f3f3f3;
    font-size: 1em;
    margin: 0.5em;
}

#canvas-holder {
    display: flex; 
    justify-content: center; 
    align-items: center; 
    box-shadow: 0 0 20px 5px rgba(255, 255, 255, 0.16);
    border-radius: 10px;
}

#button-holder {
    display: flex;
    justify-content: center; 
    gap: 10px;
}

button {
    padding: 10px 20px; 
    border: none; 
    background: #333; 
    color: #f3f3f3; 
    border-radius: 5px; 
    cursor: pointer;
    box-shadow: 0 3px 6px rgba(0,0,0,0.16);
}

button:hover {
    background: #444;
}

#slider-holder {
    display: flex;
    justify-content: center; 
    width: 80%;
}

input[type=range] {
    width: 100%;
    background: #333;
    border-radius: 10px;
}

input[type=range]::-webkit-slider-runnable-track {
    background: #333;
    border-radius: 10px;
}

#exit-fullscreen-button {
    position: absolute;
    bottom: 20px;
    z-index: 1;
}

@media only screen and (max-width: 600px) {
    h1 {
        font-size: 1.5em;
    }

    p {
        font-size: 0.8em;
    }
}