html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #111;
    display: flex;
    justify-content: center;
    align-items: center;
}

#emulator {
    position: relative;
    display: block;
    background-color: black;
    padding: 8px;
    box-sizing: content-box;
}

#screen {
    position: relative;
    font-family: monospace;
    font-size: 16px;
    line-height: 1.2em;
    width: calc(80ch);
    height: calc(25 * 1.2em);
    white-space: pre;
    overflow: hidden;
    user-select: none;
    color: #0f0;
    background-color: black;
    box-sizing: content-box;
}

#vga {
    position: absolute;
    top: 8px;
    left: 8px;
    width: calc(80ch);
    height: calc(25 * 1.2em);
    pointer-events: none;
    background-color: transparent;
}

#debug-output {
    color: #fff;
    background: #222;
    padding: 8px;
    font-family: monospace;
    min-height: 1em;
}