/* ---------- Theme tokens ---------- */
:root {
    --bg1: #f0eeea;
    --bg2: #cdcac4;
    --fg: #1a1a1c;
    --mut: #5d5b58;
    --panel: rgba(255,255,255,.72);
    --line: rgba(0,0,0,.14);
    --ac: #c8101e;
    box-sizing: border-box;
    padding-top: env(safe-area-inset-top,0px);
    padding-bottom: env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg1: #2c2e33;
        --bg2: #0e0f12;
        --fg: #f2f0ed;
        --mut: #a9a6a1;
        --panel: rgba(28,29,33,.72);
        --line: rgba(255,255,255,.16);
    }
}
:root[data-theme="dark"] {
    --bg1: #2c2e33;
    --bg2: #0e0f12;
    --fg: #f2f0ed;
    --mut: #a9a6a1;
    --panel: rgba(28,29,33,.72);
    --line: rgba(255,255,255,.16);
}

/* ---------- Page and 3D stage ---------- */
html { scroll-padding-top: env(safe-area-inset-top,0px); }
html, body { height: 100%; margin: 0; }
body {
    position: relative;
    overflow: hidden;
    font-family: Manrope,"Helvetica Neue",Arial,sans-serif;
    color: var(--fg);
    background: radial-gradient(ellipse at 50% 38%,var(--bg1),var(--bg2));
}
#stage { position: absolute; inset: 0; touch-action: none; cursor: grab; }
#stage:active { cursor: grabbing; }
#stage canvas { display: block; width: 100%; height: 100%; }

/* ---------- Buttons ---------- */
button {
    font: inherit;
    font-size: .72rem;
    font-weight: 600;
    color: var(--fg);
    background: none;
    border: 0;
    border-radius: 999px;
    padding: 6px 10px;
    cursor: pointer;
    white-space: nowrap;
}
button:hover { background: var(--line); }
button:focus-visible { outline: 2px solid var(--ac); outline-offset: 2px; }
button.on { background: var(--ac); color: #fff; }
button:disabled { opacity: .4; cursor: not-allowed; }

/* ---------- View / door navigation ---------- */
nav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 2px;
    display: flex;
    gap: 3px;
    padding: 4px;
    border-radius: 999px;
    background: var(--panel);
    border: 1px solid var(--line);
    backdrop-filter: blur(10px);
    max-width: calc(100% - 20px);
    overflow-x: auto;
}
.sep { width: 1px; background: var(--line); margin: 4px 2px; }

/* ---------- Start Cleaning button and progress panel ---------- */
#cta {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 38px;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: max-content;
    max-width: calc(100% - 24px);
    text-align: center;
}
.go {
    background: linear-gradient(180deg,#e0212f,#a60b18);
    color: #fff;
    padding: 10px 22px;
    font-size: .78rem;
    letter-spacing: .02em;
    box-shadow: 0 8px 24px rgba(200,16,30,.4), inset 0 1px 0 rgba(255,255,255,.25);
}
.go:hover { background: linear-gradient(180deg,#ea2d3b,#b50e1b); }
#st {
    background: var(--panel);
    border: 1px solid var(--line);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 12px 20px;
    display: flex;
    flex-direction: column;
    gap: 7px;
    align-items: center;
}
#st[hidden], #start[hidden] { display: none; }
#stt { font-size: .95rem; }
#bar {
    display: block;
    height: 3px;
    width: 200px;
    background: var(--line);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}
#bar:before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--ac);
    transform-origin: left;
    transform: scaleX(var(--p,0));
}
#st small { font-size: .72rem; color: var(--mut); max-width: 260px; line-height: 1.35; }