html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: #1f3d24;
    color: #ffffff;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    overscroll-behavior: none;
}

/* one-thumb play: no zoom, no text selection, no long-press callout */
body, canvas {
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

#app {
    width: 100%;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#tap-to-start {
    position: fixed;
    inset: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 12px;
    background: rgba(15, 35, 18, 0.82);
    text-align: center;
    cursor: pointer;
}

#tap-to-start .title {
    font-size: 44px;
    font-weight: 800;
}

#tap-to-start .subtitle {
    font-size: 20px;
    opacity: 0.9;
}

#tap-to-start .cta {
    margin-top: 40px;
    font-size: 18px;
    padding: 14px 24px;
    border-radius: 999px;
    background: #ffd54a;
    color: #1f3d24;
    font-weight: 700;
}