html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background: #0a0e14;
    overflow: hidden;
    font-family: -apple-system, "Inter", system-ui, sans-serif;
    color: #e8ecf3;
}

canvas {
    display: block;
}

#overlay {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
    pointer-events: none;
    z-index: 5;
}

#overlay h1 {
    font-size: 2.4rem;
    margin: 0 0 8px;
    pointer-events: none;
}

#overlay h1 span {
    color: #60a5fa;
}

#overlay p {
    max-width: 480px;
    color: #a3adc2;
    line-height: 1.5;
    margin: 4px 0;
}

#overlay .hint {
    font-size: 0.9rem;
}

#overlay .controls-legend {
    margin-top: 18px;
    font-size: 0.8rem;
    color: #6b7690;
}

#vr-button-slot {
    margin-top: 20px;
    pointer-events: auto;
}

#vr-button-slot button {
    position: relative !important;
    display: inline-block;
}

#loading {
    position: fixed;
    top: 16px;
    left: 16px;
    font-size: 0.8rem;
    color: #6b7690;
    z-index: 5;
}

body.xr-active #overlay {
    display: none;
}