html,
body {
    height: 100%;
    margin: 0;
}

body {
    background: #0b0f12;
    display: grid;
    place-items: center;
}

canvas#gl {
    width: 100vw;
    height: 100vh;
    display: block;
    overflow: hidden;
}

.hud {
    position: fixed;
    top: .75rem;
    left: .75rem;
    color: #bcd;
    font: 12px/1.1 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
    opacity: .85;
    user-select: none
}

.hud b {
    color: #eef
}

.err {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    max-height: 45vh;
    overflow: auto;
    background: #1b1f23;
    color: #f6b;
    font: 12px/1.35 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    padding: 8px 12px;
    border-top: 1px solid #334;
    white-space: pre-wrap
}


.hint {
    position: fixed;
    left: 12px;
    bottom: 10px;
    color: #fff;
    font: 12px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
    opacity: .6;
    user-select: none;
    pointer-events: none;
    text-shadow: 0 1px 2px rgba(0, 0, 0, .6);
}