* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    background: black;
    overflow: hidden;
    -webkit-text-size-adjust: 100%;
    touch-action: none;
}

.wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
    width: 100dvw;
    height: 100dvh;
    background: black;
    overflow: hidden;
    position: relative;
}

.container {
    width: 100%;
    height: 100%;
}

canvas {
    outline: none;
    width: 100%;
    height: 100%;
    display: block;
}

#fullscreen-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: rgba(255,255,255,0.15);
    border: 2px solid rgba(255,255,255,0.35);
    border-radius: 8px;
    color: white;
    font-family: monospace;
    font-size: 1rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.15s;
    z-index: 10;
}

#fullscreen-btn:hover {
    opacity: 1;
    background: rgba(255,255,255,0.25);
}

.info-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    color: white;
    opacity: 0.4;
    font-size: 0.85rem;
    padding: 0.4rem 0.6rem;
    font-family: monospace;
}