:root {
  --bg: #0f1417;
  --surface: #172026;
  --surface-2: #1f2a31;
  --line: #34434d;
  --text: #e8eef1;
  --muted: #9aabb5;
  --accent: #4fc3b0;
  --accent-ink: #062520;
  --ok: #5ad17a;
  --warn: #f2b44b;
  --danger: #ef6a5b;
  --nose: #ff7a59;
  --vertex: #6aa8ff;
  --ear: #7ddc8f;
  --light: 35%;
  --radius: 14px;
  --gutter: 16px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f4f7f8;
    --surface: #ffffff;
    --surface-2: #e9eff2;
    --line: #c9d5dc;
    --text: #13202a;
    --muted: #55656f;
    --accent: #0f8a78;
    --accent-ink: #ffffff;
    --ok: #1d9a44;
    --warn: #b7791f;
    --danger: #c9372c;
    --nose: #e0522e;
    --vertex: #2f6fd6;
    --ear: #2a9d4a;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}

button, input, select { font: inherit; color: inherit; }

.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 8px;
  padding: calc(env(safe-area-inset-top) + 10px) var(--gutter) 10px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar h1 { font-size: 17px; margin: 0; flex: 1; font-weight: 650; letter-spacing: .01em; }
.icon-btn { background: none; border: 0; padding: 6px; margin-left: -6px; border-radius: 8px; cursor: pointer; }
.icon-btn svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.sensor-pill { font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 99px; padding: 2px 10px; white-space: nowrap; }
.sensor-pill.live { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 50%, transparent); }

main { max-width: 720px; margin: 0 auto; padding: 0 var(--gutter) calc(env(safe-area-inset-bottom) + 32px); }
.screen { display: none; padding-top: 16px; }
.screen.active { display: block; }

.hero { padding: 12px 0 8px; }
.eyebrow { color: var(--accent); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; margin: 0 0 6px; }
.lede { font-size: 18px; margin: 0; color: var(--text); }

.actions { display: grid; gap: 12px; margin: 20px 0; }
.card-btn {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px; text-align: left;
  padding: 18px; border-radius: var(--radius); cursor: pointer;
  background: var(--surface); border: 1px solid var(--line);
}
.card-btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.card-btn.primary .card-sub { color: inherit; opacity: .8; }
.card-title { font-size: 18px; font-weight: 650; }
.card-sub { font-size: 14px; color: var(--muted); }

.links { display: flex; flex-wrap: wrap; gap: 8px; }
.link-btn { background: none; border: 1px solid var(--line); border-radius: 99px; padding: 8px 14px; cursor: pointer; color: var(--text); }
.fineprint { color: var(--muted); font-size: 13px; margin-top: 24px; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 14px; }
.panel h3 { margin: 0 0 8px; font-size: 15px; }
.panel p { margin: 0 0 10px; }
details.panel summary { font-weight: 600; cursor: pointer; margin-bottom: 8px; }
.hint { color: var(--muted); font-size: 14px; }
.center { text-align: center; }
.status { font-size: 14px; color: var(--muted); }
.status.ok { color: var(--ok); }
.status.bad { color: var(--danger); }

.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field > span { font-size: 13px; color: var(--muted); font-weight: 600; }
.field input { background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; min-width: 0; }
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg button {
  flex: 1 1 0; min-width: 90px; padding: 10px; border-radius: 10px; cursor: pointer;
  background: var(--surface-2); border: 1px solid var(--line); display: grid; gap: 2px; text-align: center;
}
.seg button small { font-size: 11px; color: var(--muted); }
.seg button.on { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.check { display: flex; gap: 10px; align-items: center; padding: 6px 0; }
.check input { width: 20px; height: 20px; accent-color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 16px; border-radius: 10px; cursor: pointer; text-decoration: none;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--text); min-height: 44px;
}
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight: 650; }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 50%, transparent); }
.btn.big { width: 100%; padding: 16px; font-size: 18px; margin-top: 6px; }
.btn.small { padding: 6px 10px; min-height: 36px; font-size: 14px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.row { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }

.preview { position: relative; border-radius: 12px; overflow: hidden; background: #000; aspect-ratio: 16 / 9; margin-bottom: 10px; }
.preview video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.eye-guide { position: absolute; inset: 0; display: flex; justify-content: center; align-items: center; gap: 18%; pointer-events: none; }
.eye-guide i { width: 22%; aspect-ratio: 2 / 1; border: 2px dashed rgba(255, 255, 255, .7); border-radius: 50%; }
.cam-sink { position: fixed; width: 2px; height: 2px; opacity: .01; pointer-events: none; bottom: 0; right: 0; }

/* RUN */
.screen.run.active { position: fixed; inset: 0; z-index: 10; background: var(--bg); padding: 0; overflow-y: auto; }
.lightfield {
  position: absolute; inset: 0; display: none; align-items: flex-end; justify-content: center;
  background: hsl(0 0% var(--light)); color: rgba(0, 0, 0, .35); font-size: 12px; padding-bottom: 20px;
}
.run.light .lightfield { display: flex; }
.run.light .guide { display: none; }
.guide { max-width: 760px; margin: 0 auto; padding: calc(env(safe-area-inset-top) + 12px) var(--gutter) calc(env(safe-area-inset-bottom) + 16px); }
.run-top { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--muted); }
.rec { color: var(--danger); font-weight: 600; }
.guide h2 { font-size: 22px; margin: 8px 0 4px; }
.run-instr { margin: 0 0 8px; color: var(--muted); min-height: 3em; }
.run-main { display: grid; grid-template-columns: 1fr 140px; gap: 12px; align-items: center; }
#headviz { width: 100%; height: 220px; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--line); }
.dial { position: relative; width: 140px; height: 140px; }
.dial svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.dial .track { fill: none; stroke: var(--surface-2); stroke-width: 10; }
.dial .fill { fill: none; stroke: var(--accent); stroke-width: 10; stroke-linecap: round; stroke-dasharray: 326.7; stroke-dashoffset: 326.7; transition: stroke-dashoffset .2s linear; }
.dial.in .fill { stroke: var(--ok); }
.dial-text { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.dial-text b { font-size: 34px; line-height: 1; font-variant-numeric: tabular-nums; }
.dial-text span { font-size: 12px; color: var(--muted); margin-top: 4px; }
.cue { margin: 12px 0; padding: 12px 14px; border-radius: 12px; font-size: 20px; font-weight: 650; background: var(--surface); border: 1px solid var(--line); min-height: 56px; }
.cue.ok { border-color: var(--ok); color: var(--ok); }
.cue.warn { border-color: var(--warn); color: var(--warn); }
.bars { display: grid; gap: 8px; margin-bottom: 12px; }
.bar { display: grid; grid-template-columns: 56px 1fr 112px; gap: 10px; align-items: center; font-size: 13px; color: var(--muted); }
.bar em { font-style: normal; color: var(--text); font-variant-numeric: tabular-nums; }
.bar-track { position: relative; height: 12px; border-radius: 6px; background: var(--surface-2); }
.bar-track .zone { position: absolute; top: 0; bottom: 0; background: color-mix(in srgb, var(--ok) 30%, transparent); border-radius: 6px; }
.bar-track .needle { position: absolute; top: -4px; width: 4px; height: 20px; margin-left: -2px; border-radius: 2px; background: var(--text); transition: left .1s linear; }
.steps { list-style: none; padding: 0; margin: 0 0 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.steps li { font-size: 12px; padding: 4px 9px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }
.steps li.done { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.steps li.now { color: var(--accent-ink); background: var(--accent); border-color: transparent; }
.controls { display: flex; flex-wrap: wrap; gap: 8px; }
.controls .btn { flex: 1 1 110px; }
.nys { margin-bottom: 12px; }
.nys-time { display: grid; grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); gap: 8px; }
.nys-time .btn { min-height: 56px; font-size: 18px; font-weight: 650; }
.nys-time .btn.on { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.chips button.on { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
#nys-log { margin: 4px 0 0; }
.demo { display: grid; gap: 6px; padding: 12px; margin-bottom: 12px; border: 1px dashed var(--line); border-radius: 12px; font-size: 14px; }
.demo label { display: grid; grid-template-columns: 60px 1fr; align-items: center; }

@media (orientation: landscape) and (max-height: 520px) {
  .guide { display: grid; grid-template-columns: 1fr 1fr; column-gap: 16px; }
  .run-top, .guide h2, .run-instr { grid-column: 1 / -1; }
  #headviz { height: 160px; }
}

/* FINDINGS / SUMMARY */
.meta { color: var(--muted); font-size: 14px; margin-bottom: 12px; }
.side-card h3 { font-size: 17px; }
.player { margin-bottom: 12px; }
.player-frame { position: relative; background: #000; border-radius: 12px; overflow: hidden; aspect-ratio: 16 / 9; display: grid; place-items: center; }
.player-frame video { width: 100%; height: 100%; object-fit: contain; transition: transform .2s; }
.side-tag { position: absolute; top: 8px; font-size: 11px; font-weight: 700; color: #fff; background: rgba(0, 0, 0, .55); padding: 2px 6px; border-radius: 6px; }
.side-tag.left { left: 8px; } .side-tag.right { right: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.chips button { font-size: 12px; padding: 4px 10px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--line); cursor: pointer; }
.player-tools { display: flex; flex-wrap: wrap; gap: 6px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px 14px; margin: 12px 0; }
.form-grid label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.form-grid select, .form-grid input[type=number] { background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; padding: 8px; color: var(--text); }
.form-grid label.check { display: flex; color: var(--text); font-size: 14px; }
.interp { padding: 12px; border-radius: 10px; border-left: 4px solid var(--line); background: var(--surface-2); margin: 8px 0; }
.interp.pos { border-color: var(--accent); }
.interp.neg { border-color: var(--ok); }
.interp.warn { border-color: var(--warn); }
.interp.alert { border-color: var(--danger); }
.log { width: 100%; border-collapse: collapse; font-size: 14px; }
.log th, .log td { text-align: left; padding: 6px 4px; border-bottom: 1px solid var(--line); }
.log th { color: var(--muted); font-weight: 600; font-size: 12px; }
.log td.num, .log th.num { text-align: right; font-variant-numeric: tabular-nums; }
.advice ul { margin: 0; padding-left: 20px; }

.sessions { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.sessions li { display: flex; gap: 10px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.sessions li button.open { flex: 1; text-align: left; background: none; border: 0; cursor: pointer; padding: 0; }
.sessions li small { display: block; color: var(--muted); }

.settings .num { display: grid; grid-template-columns: 1fr 88px 24px; align-items: center; gap: 8px; padding: 6px 0; }
.settings input[type=number] { background: var(--surface-2); border: 1px solid var(--line); border-radius: 8px; padding: 8px; text-align: right; }
.settings h3 { margin-top: 14px; }

.prose h3 { margin: 18px 0 6px; }
.prose p, .prose li { color: var(--text); }

.toast { position: fixed; left: 50%; bottom: calc(env(safe-area-inset-bottom) + 24px); transform: translateX(-50%); z-index: 20; background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 14px; max-width: calc(100% - 32px); }

@media print {
  .topbar, .row, .player, .links { display: none !important; }
  body { background: #fff; color: #000; }
}