/* Layout: a full-height workshop stage for the 3D bike, with a parts-index rail on the left; controls float over the stage */
:root {
  --bg: #e7ebed;
  --panel: #f5f7f8;
  --ink: #172026;
  --muted: #59666f;
  --line: #cfd7dc;
  --chip: #e2e8eb;
  --accent: #16709f;
  --signal: #d9730a;
  --stage: #dfe5e8;
  --floor: #d6dde1;
  --grid: #b4c0c7;
  --overlay: rgba(245, 247, 248, 0.92);
  --shadow: 0 6px 24px rgba(23, 32, 38, 0.12);
  --ok: #1d7a46; --ok-bg: #dcefe3; --warn: #8a5a00; --warn-bg: #f6e8c8; --bad: #a3271c; --bad-bg: #f6dcd8; --on: #b8321f; --on-bg: #fbe1d6;
  --font-display: "Saira Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1316; --panel: #141b1f; --ink: #e1e8eb; --muted: #8e9ca4; --line: #26323a; --chip: #1c262b;
    --accent: #58b2e0; --signal: #ffa53d; --stage: #11181c; --floor: #151e23; --grid: #27343c;
    --overlay: rgba(20, 27, 31, 0.92); --shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
    --ok: #6fd39b; --ok-bg: #173526; --warn: #f2c16b; --warn-bg: #3a2c12; --bad: #ff8b7e; --bad-bg: #3d1a17; --on: #ff9a7a; --on-bg: #3f1f16;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1316; --panel: #141b1f; --ink: #e1e8eb; --muted: #8e9ca4; --line: #26323a; --chip: #1c262b;
  --accent: #58b2e0; --signal: #ffa53d; --stage: #11181c; --floor: #151e23; --grid: #27343c;
  --overlay: rgba(20, 27, 31, 0.92); --shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
    --ok: #6fd39b; --ok-bg: #173526; --warn: #f2c16b; --warn-bg: #3a2c12; --bad: #ff8b7e; --bad-bg: #3d1a17; --on: #ff9a7a; --on-bg: #3f1f16;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 14px/1.45 var(--font-body); overflow: hidden; -webkit-font-smoothing: antialiased; }
button { font: inherit; color: inherit; cursor: pointer; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

#app { height: 100%; display: grid; grid-template-columns: minmax(280px, 330px) 1fr; }

/* ---------- Parts index rail ---------- */
#panel { background: var(--panel); border-right: 1px solid var(--line); overflow-y: auto; display: flex; flex-direction: column; gap: 22px; padding: 22px 18px 28px; min-width: 0; z-index: 5; }
.eyebrow { margin: 0; font: 500 11px/1.2 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
h1 { margin: 6px 0 8px; font: 700 38px/0.92 var(--font-display); letter-spacing: .01em; text-transform: uppercase; text-wrap: balance; }
.lede { margin: 0; color: var(--muted); font-size: 13px; max-width: 36ch; }
.block-title { margin: 0 0 8px; font: 600 13px/1 var(--font-display); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.specs dl { margin: 0; display: grid; grid-template-columns: 1fr auto; }
.specs dt, .specs dd { margin: 0; padding: 6px 0; border-bottom: 1px solid var(--line); }
.specs dt { color: var(--muted); font-size: 13px; }
.specs dd { font: 500 12.5px/1.45 var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; }
.specs .src { margin: 8px 0 0; font-size: 11.5px; color: var(--muted); }

.sys + .sys { border-top: 1px solid var(--line); }
.sys-head { display: flex; align-items: center; gap: 8px; padding: 8px 0; }
.sys-toggle { flex: 1; min-width: 0; display: flex; align-items: center; gap: 8px; background: none; border: 0; padding: 4px 0; text-align: left; }
.sys-toggle .caret { width: 8px; height: 8px; border-right: 1.5px solid var(--muted); border-bottom: 1.5px solid var(--muted); transform: rotate(45deg) translate(-2px, -2px); transition: transform .15s; flex: none; }
.sys-toggle[aria-expanded="false"] .caret { transform: rotate(-45deg); }
.sys-name { font: 600 16px/1.1 var(--font-display); letter-spacing: .04em; text-transform: uppercase; }
.count { font: 500 11px var(--font-mono); color: var(--muted); background: var(--chip); border-radius: 999px; padding: 1px 7px; }
.switch { position: relative; display: inline-flex; flex: none; cursor: pointer; }
.switch input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.switch .track { width: 32px; height: 18px; border-radius: 999px; background: var(--line); position: relative; transition: background .15s; }
.switch .track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: var(--panel); box-shadow: 0 1px 2px rgba(0,0,0,.25); transition: transform .15s; }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(14px); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }
.parts { list-style: none; margin: 0 0 8px; padding: 0 0 0 16px; display: grid; gap: 1px; }
.parts li { display: flex; align-items: center; gap: 4px; }
.part { flex: 1; min-width: 0; text-align: left; background: none; border: 0; border-radius: 6px; padding: 5px 8px; font-size: 13.5px; display: flex; align-items: center; gap: 8px; }
.part::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: transparent; flex: none; }
.part:hover { background: var(--chip); }
.part[aria-current="true"] { background: var(--chip); font-weight: 600; }
.part[aria-current="true"]::before { background: var(--signal); }
.part.off { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--line); }
.eye { flex: none; width: 28px; height: 26px; display: grid; place-items: center; background: none; border: 0; border-radius: 6px; color: var(--muted); }
.eye:hover { background: var(--chip); color: var(--ink); }
.eye svg { width: 16px; height: 16px; }
.eye .shut { display: none; }
.eye[aria-pressed="false"] .open { display: none; }
.eye[aria-pressed="false"] .shut { display: block; }

.stages { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; counter-reset: stage; }
.stages li { display: grid; grid-template-columns: 22px 1fr auto; align-items: baseline; gap: 6px; font-size: 13px; color: var(--muted); }
.stages li::before { counter-increment: stage; content: counter(stage); font: 500 11px var(--font-mono); color: var(--muted); }
.stages li.now { color: var(--ink); font-weight: 600; }
.stages li.now::before { color: var(--accent); }
.stages .tag { font: 500 10.5px var(--font-mono); text-transform: uppercase; letter-spacing: .06em; color: var(--accent); }
.basis-key { margin: 0; font-size: 12px; color: var(--muted); display: grid; gap: 4px; }

/* ---------- Stage ---------- */
#stage { position: relative; min-width: 0; overflow: hidden; background: var(--stage); }
#viewport { position: absolute; inset: 0; }
#viewport canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.labels { position: absolute; inset: 0; pointer-events: none; }
.topbar { position: absolute; top: 16px; left: 16px; right: 16px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; pointer-events: none; }
.topbar > * { pointer-events: auto; }
.seg { display: inline-flex; gap: 2px; background: var(--overlay); border: 1px solid var(--line); border-radius: 9px; padding: 3px; box-shadow: var(--shadow); backdrop-filter: blur(6px); max-width: 100%; overflow-x: auto; }
.seg button { flex: none; border: 0; background: none; border-radius: 6px; padding: 6px 11px; font: 600 13px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.seg button:hover { color: var(--ink); background: var(--chip); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--panel); }
.tools { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.tool { border: 1px solid var(--line); background: var(--overlay); border-radius: 9px; padding: 7px 12px; font: 600 13px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--ink); box-shadow: var(--shadow); backdrop-filter: blur(6px); display: inline-flex; align-items: center; gap: 7px; }
.tool:hover { border-color: var(--muted); }
.tool[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.tool .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: .5; }
.tool[aria-pressed="true"] .dot { opacity: 1; }
#panelToggle { display: none; }

.bottombar { position: absolute; left: 16px; bottom: 16px; display: grid; gap: 6px; max-width: min(360px, calc(100% - 32px)); }
.explode { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; background: var(--overlay); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; box-shadow: var(--shadow); backdrop-filter: blur(6px); }
.explode label { font: 600 13px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; }
.explode output { font: 500 12px var(--font-mono); font-variant-numeric: tabular-nums; color: var(--muted); min-width: 4ch; text-align: right; }
input[type="range"] { width: 100%; min-width: 0; accent-color: var(--accent); }
.navpad { position: absolute; right: 16px; top: 50%; transform: translateY(-50%); z-index: 2; display: grid; gap: 2px; padding: 4px; background: var(--overlay); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
.navpad button { width: 40px; height: 40px; display: grid; place-items: center; border: 0; border-radius: 8px; background: none; color: var(--ink); font: 700 16px/1 var(--font-display); cursor: pointer; touch-action: manipulation; }
.navpad button:hover, .navpad button[aria-expanded="true"] { background: var(--chip); }
.navpad svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.navhelp { position: absolute; right: 70px; top: 50%; transform: translateY(-50%); z-index: 4; width: min(270px, calc(100% - 100px)); background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 12px 14px; display: grid; gap: 6px; }
.navhelp[hidden] { display: none; }
.navhelp p { margin: 0; font-size: 12.5px; line-height: 1.35; color: var(--muted); }
.navhelp b { display: block; color: var(--ink); font: 600 12px/1.3 var(--font-display); letter-spacing: .08em; text-transform: uppercase; }
.legend { margin: 0; font: 400 11.5px var(--font-mono); color: var(--muted); padding-left: 2px; }

#info { position: absolute; right: 16px; bottom: 16px; width: min(350px, calc(100% - 32px)); background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px 16px; box-shadow: var(--shadow); display: grid; gap: 8px; max-height: calc(100% - 100px); overflow-y: auto; }
#info .info-sys { margin: 0; font: 500 11px/1.2 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); padding-right: 28px; }
#info h2 { margin: 0; font: 700 26px/1 var(--font-display); text-transform: uppercase; letter-spacing: .02em; text-wrap: balance; padding-right: 28px; }
#info .info-desc { margin: 0; font-size: 13.5px; max-width: 60ch; }
.basis { justify-self: start; font: 500 11px var(--font-mono); padding: 3px 8px; border-radius: 999px; background: var(--chip); color: var(--muted); display: inline-flex; gap: 6px; align-items: center; }
.basis::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.basis[data-basis="spec"]::before { background: var(--accent); }
.basis[data-basis="photo"]::before { background: var(--signal); }
.basis[data-basis="manual"]::before { background: var(--ok); }
.info-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.info-actions button { border: 1px solid var(--line); background: var(--bg); border-radius: 8px; padding: 6px 10px; font: 600 12.5px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; }
.info-actions button:hover { border-color: var(--muted); }
#infoClose { position: absolute; top: 10px; right: 10px; width: 28px; height: 28px; border: 0; background: none; border-radius: 6px; font-size: 20px; line-height: 1; color: var(--muted); }
#infoClose:hover { background: var(--chip); color: var(--ink); }

#tip { position: absolute; pointer-events: none; background: var(--ink); color: var(--panel); font: 600 12.5px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; padding: 6px 9px; border-radius: 6px; white-space: nowrap; transform: translate(12px, 12px); z-index: 4; }
.dim { font: 500 11px/1.25 var(--font-mono); font-variant-numeric: tabular-nums; background: var(--panel); color: var(--ink); border: 1px solid var(--accent); border-radius: 5px; padding: 3px 6px; white-space: nowrap; text-align: center; }
.dim b { font-weight: 500; display: block; }
.dim span { display: block; color: var(--muted); font-size: 10px; }
#loading { position: absolute; inset: 0; display: grid; place-items: center; font: 600 15px var(--font-display); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); background: var(--stage); z-index: 6; }
#loading p { margin: 0; max-width: 40ch; text-align: center; padding: 0 16px; }

/* ---------- intro (stage 6) ---------- */
#intro { position: absolute; inset: 0; z-index: 8; display: grid; place-items: center; padding: 16px; background: color-mix(in srgb, var(--stage) 55%, transparent); backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); }
#intro[hidden] { display: none; }
.intro-card { width: min(560px, 100%); max-height: 100%; overflow-y: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); padding: 22px 24px 20px; display: grid; gap: 12px; }
.intro-card h2 { margin: 0; font: 700 40px/0.92 var(--font-display); letter-spacing: .01em; text-transform: uppercase; text-wrap: balance; }
.intro-lede { margin: 0; font-size: 15px; line-height: 1.45; max-width: 52ch; }
.intro-stages { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; counter-reset: is; }
.intro-stages button { width: 100%; display: grid; grid-template-columns: 26px minmax(0, 1fr); column-gap: 10px; text-align: left; border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 10px; padding: 9px 12px; font: inherit; cursor: pointer; }
.intro-stages button::before { counter-increment: is; content: counter(is); grid-row: span 2; align-self: center; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: var(--chip); font: 600 12px var(--font-mono); color: var(--muted); }
.intro-stages button:hover, .intro-stages button:focus-visible { border-color: var(--accent); }
.intro-stages button:hover::before { background: var(--accent); color: #fff; }
.intro-stages b { font: 600 15px/1.2 var(--font-display); letter-spacing: .06em; text-transform: uppercase; }
.intro-stages span { font-size: 13px; color: var(--muted); line-height: 1.35; }
.intro-key { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 12.5px; color: var(--muted); }
.intro-small { margin: 0; font-size: 11.5px; color: var(--muted); }

/* ---------- stage 2: brakes ---------- */
.tb-left { display: flex; flex-wrap: wrap; gap: 8px; min-width: 0; }
.stage-seg button[aria-pressed="true"] { background: var(--accent); color: #fff; }
.bpanel { position: absolute; left: 16px; bottom: 16px; width: min(380px, calc(100% - 32px)); max-height: calc(100% - 96px); overflow-y: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 12px 14px 14px; display: grid; gap: 12px; z-index: 3; }
.bp-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.bp-tabs { display: inline-flex; gap: 2px; background: var(--chip); border-radius: 9px; padding: 3px; }
.bp-tabs button { border: 0; background: none; border-radius: 6px; padding: 7px 14px; font: 600 13px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.bp-tabs button[aria-selected="true"] { background: var(--ink); color: var(--panel); }
.bp-collapse { border: 1px solid var(--line); background: none; border-radius: 8px; padding: 6px 10px; font: 600 12px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
#bpBody { display: grid; gap: 12px; }
.hold { width: 100%; border: 0; border-radius: 10px; padding: 13px 14px; background: var(--accent); color: #fff; font: 700 16px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; touch-action: none; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.hold.down { background: var(--signal); }
.bp-slider { display: grid; grid-template-columns: 96px minmax(0, 1fr) 76px; align-items: center; gap: 10px; }
.bp-slider label { font: 600 12.5px/1.1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.bp-slider output { font: 500 12px var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; }
.bp-firm { margin: -6px 0 0; font: 500 11.5px var(--font-mono); color: var(--signal); }
.bp-read { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.bp-read > div { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; min-width: 0; display: grid; gap: 5px; align-content: start; }
.bp-read dt { font: 500 10.5px/1.2 var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.bp-read dd { margin: 0; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font: 600 14px/1.2 var(--font-body); font-variant-numeric: tabular-nums; }
.bp-read dd small { font: 400 11.5px/1.2 var(--font-body); color: var(--muted); }
.chip { font: 600 10.5px/1 var(--font-mono); letter-spacing: .02em; padding: 4px 7px; border-radius: 999px; background: var(--chip); color: var(--muted); white-space: nowrap; }
.chip[data-state="ok"] { background: var(--ok-bg); color: var(--ok); }
.chip[data-state="warn"] { background: var(--warn-bg); color: var(--warn); }
.chip[data-state="bad"] { background: var(--bad-bg); color: var(--bad); }
.chip[data-state="on"] { background: var(--on-bg); color: var(--on); }
.bp-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; counter-reset: st; }
.bp-steps li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 8px; font-size: 13px; line-height: 1.35; color: var(--muted); padding: 5px 6px; border-radius: 6px; }
.bp-steps li::before { counter-increment: st; content: counter(st); font: 600 11px/20px var(--font-mono); text-align: center; border-radius: 50%; width: 20px; height: 20px; background: var(--chip); color: var(--muted); }
.bp-steps li.done { color: var(--ink); }
.bp-steps li.done::before { background: var(--line); color: var(--ink); }
.bp-steps li.active { color: var(--ink); background: var(--chip); }
.bp-steps li.active::before { background: var(--signal); color: #fff; }
.bp-checks { border-top: 1px solid var(--line); padding-top: 10px; }
.bp-checks summary { cursor: pointer; font: 600 13px/1 var(--font-display); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); padding: 2px 0; }
.bp-checks .inner { display: grid; gap: 10px; margin-top: 12px; }
.bp-hint, .bp-wear { margin: 0; font-size: 12.5px; color: var(--muted); max-width: 60ch; }
.bp-wear-row { display: flex; align-items: flex-start; gap: 8px; }
.bp-wear { color: var(--ink); }
.bp-row { display: flex; flex-wrap: wrap; gap: 6px; }
.bp-row button { border: 1px solid var(--line); background: var(--bg); border-radius: 8px; padding: 7px 10px; font: 600 12.5px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; }
.bp-row button:hover { border-color: var(--muted); }
.bp-row button[aria-pressed="true"] { background: var(--ink); color: var(--panel); border-color: var(--ink); }
.bp-note { margin: 0; font-size: 11.5px; color: var(--muted); }
.faults { display: grid; gap: 12px; }
.fault h3 { margin: 0 0 4px; font: 600 15px/1.15 var(--font-display); letter-spacing: .04em; text-transform: uppercase; }
.fault ul { margin: 0; padding-left: 16px; display: grid; gap: 3px; font-size: 13px; }
.fault li::marker { color: var(--muted); }
.fault b { font-weight: 600; }

/* ---------- stage 3: engine ---------- */
.ep-play { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 6px; }
.ep-step, .ep-tdc { border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 10px; padding: 0 12px; font: 600 12.5px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; }
.ep-step:hover, .ep-tdc:hover { border-color: var(--muted); }
.ep-tdc { padding: 10px 12px; justify-self: start; }
.hold[aria-pressed="false"] { background: var(--ink); color: var(--panel); }
.ep-other { margin: -4px 0 0; font-size: 12.5px; color: var(--muted); }
.ep-figs { margin: 0; display: grid; grid-template-columns: minmax(0, 1fr) auto; }
.ep-figs dt, .ep-figs dd { margin: 0; padding: 5px 0; border-bottom: 1px solid var(--line); }
.ep-figs dt { color: var(--muted); font-size: 12.5px; }
.ep-figs dd { font: 500 11.5px/1.45 var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; padding-left: 10px; }

/* ---------- stage 4: clutch and gearbox ---------- */
.gp-gear { display: flex; align-items: center; gap: 10px; min-width: 0; }
.gp-label { font: 600 12.5px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.gp-gear output { min-width: 34px; text-align: center; font: 700 30px/1 var(--font-display); color: var(--ink); background: var(--chip); border-radius: 8px; padding: 4px 8px; font-variant-numeric: tabular-nums; }
.gp-shift { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.gp-shift .ep-step { padding: 10px 6px; }
.gp-pattern { margin: -4px 0 0; font-size: 12px; color: var(--muted); }

/* ---------- stage 5: electrical ---------- */
.xp-seg button[aria-pressed="true"] { background: var(--ink); color: var(--panel); }
.xp-sw { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 6px 10px; }
.xp-l { font: 600 12.5px/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.xp-sw .xp-seg { justify-self: start; }
.xp-hold { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.xp-hold .ep-step { padding: 10px 4px; touch-action: none; user-select: none; -webkit-user-select: none; }
.xp-hold .ep-step.down { background: var(--signal); border-color: var(--signal); color: #fff; }
.xp-start { border-color: var(--accent); }
.xp-live { display: flex; flex-wrap: wrap; gap: 6px; min-height: 20px; }
.xp-chip { border: 0; cursor: pointer; }
.xp-none { font-size: 12.5px; color: var(--muted); }
.xp-circ { margin: 0 0 -6px; font: 600 13px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.stages button { border: 0; background: none; padding: 0; font: inherit; color: inherit; text-align: left; text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: 3px; }
.stages button:hover { text-decoration-color: var(--accent); }
.stages .tag.soon { color: var(--muted); }

@media (max-width: 760px) {
  #app { grid-template-columns: 1fr; }
  #panel { position: fixed; left: 0; right: 0; bottom: 0; max-height: 72%; transform: translateY(105%); transition: transform .25s ease; border-right: 0; border-top: 1px solid var(--line); border-radius: 16px 16px 0 0; box-shadow: var(--shadow); padding-bottom: calc(28px + env(safe-area-inset-bottom, 0px)); z-index: 10; }
  #panel.open { transform: none; }
  #panelToggle { display: inline-flex; }
  h1 { font-size: 32px; }
  .topbar { top: 12px; left: 12px; right: 12px; }
  .tool { padding: 6px 9px; font-size: 12px; gap: 5px; }
  .seg button { padding: 6px 9px; font-size: 12px; }
  .bottombar { left: 12px; right: 12px; bottom: 12px; max-width: none; }
  #info { left: 12px; right: 12px; width: auto; bottom: 92px; max-height: 46%; }
  .bpanel { left: 12px; right: 12px; bottom: 12px; width: auto; max-height: 56%; padding: 10px 12px 12px; }
  .panel-mode #info { top: 104px; bottom: auto; max-height: 34%; }
  .ep-step { padding: 0 9px; }
  .xp-hold { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .navpad { right: 12px; top: 136px; transform: none; }
  .navpad button { width: 44px; height: 44px; }
  .navhelp { right: 70px; top: 136px; transform: none; }
  .panel-mode .navpad { top: 136px; }
  .intro-card { padding: 16px 16px 14px; gap: 10px; }
  .intro-card h2 { font-size: 30px; }
  .intro-lede { font-size: 14px; }
  .intro-stages span { display: none; }
  .intro-stages button { padding: 8px 10px; }
  .bp-slider { grid-template-columns: 84px minmax(0, 1fr) 76px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}