:root {
  --bg: #060b0f;
  --panel: rgba(255, 255, 255, 0.075);
  --panel-strong: rgba(255, 255, 255, 0.12);
  --line: rgba(255, 255, 255, 0.08);
  --mint: #4ffaab;
  --mint-dim: rgba(79, 250, 171, 0.12);
  --text: #f4f7f8;
  --muted: rgba(255, 255, 255, 0.62);
  --red: rgba(255, 59, 48, 0.92);
  --radius: 22px;
  --font: ui-rounded, -apple-system, "SF Pro Rounded", system-ui, sans-serif;
  --sat: env(safe-area-inset-top, 0px);
  --sab: env(safe-area-inset-bottom, 0px);
  --sal: env(safe-area-inset-left, 0px);
  --sar: env(safe-area-inset-right, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.35;
  overscroll-behavior: none;
  touch-action: manipulation;
  -webkit-font-smoothing: antialiased;
  -webkit-user-select: none;
  user-select: none;
}
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
svg { width: 1em; height: 1em; display: block; }
[hidden] { display: none !important; }

/* ───────── Setup ───────── */
.setup {
  min-height: 100dvh;
  padding: calc(28px + var(--sat)) 22px calc(36px + var(--sab));
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 520px;
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 11px; font-size: 28px; font-weight: 700; }
.brand-mark { width: 30px; height: 30px; color: var(--mint); }
.brand h1 { margin: 0; font-size: inherit; font-weight: inherit; letter-spacing: -0.5px; }
.brand h1 span { color: var(--mint); }

.hero h2 { margin: 0 0 10px; font-size: 38px; line-height: 1.05; letter-spacing: -1.1px; font-weight: 700; }
.hero p { margin: 0; color: var(--muted); font-weight: 500; line-height: 1.5; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.panel-head { display: flex; align-items: center; justify-content: space-between; }
.panel-title { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.panel-title svg { width: 20px; height: 20px; }
.badge {
  font-size: 12px; font-weight: 700; color: var(--mint);
  background: var(--mint-dim); padding: 6px 10px; border-radius: 999px; letter-spacing: 0.4px;
}

.choices { display: flex; flex-direction: column; gap: 8px; }
.choice {
  display: flex; align-items: center; gap: 14px;
  padding: 13px 14px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.24);
  border: 1px solid transparent;
  cursor: pointer;
}
.choice input[type="radio"] {
  appearance: none; -webkit-appearance: none;
  width: 22px; height: 22px; margin: 0; flex: none;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  display: grid; place-items: center;
}
.choice input[type="radio"]::after {
  content: ""; width: 11px; height: 11px; border-radius: 50%;
  background: var(--mint); transform: scale(0); transition: transform 0.15s;
}
.choice input[type="radio"]:checked { border-color: var(--mint); }
.choice input[type="radio"]:checked::after { transform: scale(1); }
.choice:has(input:checked) { border-color: rgba(79, 250, 171, 0.45); }
.choice.disabled { opacity: 0.42; cursor: default; }
.choice-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.choice-title { font-weight: 600; font-size: 15px; }
.choice-sub { font-size: 13px; color: var(--muted); }

.tuning summary {
  cursor: pointer; font-size: 13px; font-weight: 700; letter-spacing: 1.2px;
  text-transform: uppercase; color: var(--muted); list-style: none;
}
.tuning summary::-webkit-details-marker { display: none; }
.tuning summary::after { content: " +"; }
.tuning[open] summary::after { content: " –"; }
.tuning[open] summary { margin-bottom: 10px; }
.slider, .check { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); margin-bottom: 12px; }
.slider b, .check b { color: var(--text); }
.slider input { width: 100%; accent-color: var(--mint); }
.check { flex-direction: row; align-items: center; gap: 10px; }
.check input { width: 20px; height: 20px; accent-color: var(--mint); margin: 0; }

.primary {
  display: flex; align-items: center; gap: 12px;
  height: 60px; padding: 0 20px;
  background: var(--mint); color: #000;
  border-radius: 19px; font-weight: 600; font-size: 17px;
}
.primary svg { width: 22px; height: 22px; }
.primary .arrow { margin-left: auto; }
.primary:active { transform: scale(0.985); }

.footnote { margin: 0; font-size: 13px; color: var(--muted); display: flex; gap: 8px; align-items: flex-start; }
.footnote.error { color: #ff8a80; }

/* ───────── Live ───────── */
.live {
  position: fixed; inset: 0;
  background: #000;
  overflow: hidden;
}
.stage {
  position: absolute; inset: 0;
  overflow: hidden;
  touch-action: none;
}
.source {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  width: auto;
  max-width: none;
  will-change: transform;
  transform: translate3d(0, 0, 0);
  pointer-events: none;
}
.vignette {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to bottom, rgba(0,0,0,0.62), transparent 30%, transparent 62%, rgba(0,0,0,0.72));
}

.hud { position: absolute; left: calc(18px + var(--sal)); right: calc(18px + var(--sar)); display: flex; align-items: center; gap: 10px; }
.hud.top { top: calc(10px + var(--sat)); }
.hud.mid { left: 0; right: 0; bottom: calc(96px + var(--sab)); flex-direction: column; gap: 10px; pointer-events: none; }
.hud.bottom { bottom: calc(12px + var(--sab)); gap: 14px; }

.round, .pill, .tile, .hint, .diag {
  background: rgba(20, 24, 28, 0.55);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid var(--line);
}
.round { width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; font-size: 20px; }
.pill { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: 9px 13px; border-radius: 999px; text-align: left; }
.eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 1px; color: var(--mint); display: flex; align-items: center; gap: 6px; }
.eyebrow .dot { width: 7px; height: 7px; }
.stat { font-size: 12px; font-weight: 600; color: rgba(255,255,255,0.86); font-variant-numeric: tabular-nums; }
.spacer { flex: 1; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 10px rgba(79,250,171,0.6); }
.dot.off { background: rgba(255,255,255,0.3); box-shadow: none; }

.diag {
  position: absolute; top: calc(64px + var(--sat)); left: calc(18px + var(--sal));
  border-radius: 16px; padding: 10px 12px;
  display: grid; grid-template-columns: auto auto; gap: 4px 14px;
  font-size: 12px; font-variant-numeric: tabular-nums;
}
.diag div { display: contents; }
.diag span { color: var(--muted); }
.diag b { font-weight: 600; }

.hint { display: flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: 1.3px; }
.hint svg { width: 14px; height: 14px; }
.track { position: relative; width: 116px; height: 16px; }
.track::before { content: ""; position: absolute; left: 0; right: 0; top: 6.5px; height: 3px; border-radius: 2px; background: rgba(255,255,255,0.2); }
.knob { position: absolute; top: 0; left: 0; width: 16px; height: 16px; border-radius: 50%; background: var(--mint); will-change: transform; }

.round.stop { background: var(--red); border-color: transparent; backdrop-filter: none; -webkit-backdrop-filter: none; }
.hud.top .round svg { width: 20px; height: 20px; }

/* Player bar */
.player {
  flex: 1; min-width: 0; height: 56px; padding: 0 8px 0 4px;
  display: flex; align-items: center; gap: 6px;
  border-radius: 18px;
  background: rgba(20, 24, 28, 0.55);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid var(--line);
  touch-action: none;
}
.player[hidden] { display: none !important; }
.pbtn { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; flex: none; }
.pbtn svg { width: 22px; height: 22px; }
.pbtn:active { background: rgba(255,255,255,0.1); }
.time { font-size: 12px; font-weight: 600; color: rgba(255,255,255,0.86); font-variant-numeric: tabular-nums; flex: none; min-width: 34px; text-align: center; }
.scrub { position: relative; flex: 1; height: 44px; cursor: grab; }
.scrub:active { cursor: grabbing; }
.scrub-track { position: absolute; left: 0; right: 0; top: 20px; height: 4px; border-radius: 2px; background: rgba(255,255,255,0.2); overflow: hidden; }
.scrub-fill { height: 100%; width: 0; background: var(--mint); }
.scrub-knob {
  position: absolute; top: 13px; left: 0; width: 18px; height: 18px; margin-left: -9px;
  border-radius: 50%; background: #fff; box-shadow: 0 1px 6px rgba(0,0,0,0.5);
  will-change: transform; transition: transform 0.12s;
}
.scrub.grabbing .scrub-knob { transform: scale(1.35); }

.rotate {
  position: absolute; inset: 0; z-index: 10;
  background: rgba(6, 11, 15, 0.92);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  color: var(--mint); font-size: 48px;
}
.rotate p { margin: 0; font-size: 17px; font-weight: 600; color: var(--text); }
@media (orientation: landscape) and (max-height: 500px) { .rotate { display: flex !important; } }