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

html, body {
    width: 100%;
    height: 100%;
}

body {
    background: #f1f1eb;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
    touch-action: none;
    overscroll-behavior: none;
}

canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    height: 100dvh; /* iOS Safari: dynamic viewport height (passt sich toolbar an) */
    display: block;
    z-index: 0;
    will-change: transform;
}

#gyro-overlay {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
}