/* Light is the default; dark follows the system unless the user picks a theme in settings */
:root {
  --panel: #F2F1EF;
  --sheet: #F2F1EF;
  --ink: #232323;
  --ink-2: #4A4947;
  --on-ink: #FFFFFF;
  --raised: #FFFFFF;
  --g1: #8A8987;
  --g2: #BDBCB9;
  --chip: #E5E3E0;
  --line: rgba(35,35,35,.08);
  --accent: #E2604F;
  --accent-soft: #F6D5CD;
  --green: #2FB865;
  --ok-soft: #D3EFDC;
  --live: #3ACB5F;
  --scrim: rgba(30,26,24,.35);
  --shadow: rgba(35,30,28,.12);
  --sans: "Avenir Next", "Avenir", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --panel: #141211;
    --sheet: #1F1C1B;
    --ink: #F1EEEA;
    --ink-2: #C9C4BF;
    --on-ink: #141211;
    --raised: #3A3532;
    --g1: #9A948F;
    --g2: #5C5753;
    --chip: #2A2624;
    --line: rgba(255,255,255,.08);
    --accent: #F27762;
    --accent-soft: #4A2620;
    --green: #4CCB7E;
    --ok-soft: #1E3A29;
    --live: #4CD964;
    --scrim: rgba(0,0,0,.55);
    --shadow: rgba(0,0,0,.4);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --panel: #141211;
  --sheet: #1F1C1B;
  --ink: #F1EEEA;
  --ink-2: #C9C4BF;
  --on-ink: #141211;
  --raised: #3A3532;
  --g1: #9A948F;
  --g2: #5C5753;
  --chip: #2A2624;
  --line: rgba(255,255,255,.08);
  --accent: #F27762;
  --accent-soft: #4A2620;
  --green: #4CCB7E;
  --ok-soft: #1E3A29;
  --live: #4CD964;
  --scrim: rgba(0,0,0,.55);
  --shadow: rgba(0,0,0,.4);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  background: var(--panel);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
  overscroll-behavior: none;
  overflow: hidden;
}
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; touch-action: manipulation; text-align: left; text-transform: inherit; }
button:focus-visible { outline: 1.5px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------- Main ---------- */

.app {
  height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  display: flex; flex-direction: column;
  padding: calc(env(safe-area-inset-top) + 16px) 16px calc(env(safe-area-inset-bottom) + 8px);
}

/* Header */
.top { display: flex; justify-content: space-between; align-items: flex-start; padding: 0 8px 16px; }
.brand { display: flex; flex-direction: column; align-items: flex-start; min-height: 78px; }
.wordmark { font-size: 22px; font-weight: 700; line-height: 1; letter-spacing: -.02em; }
/* Native pickers: a transparent <select> sits over the label, so a tap opens the
   phone's own picker while the header keeps its typography. */
.pick { position: relative; display: inline-flex; align-items: center; gap: 8px; color: var(--g1); font-size: 14px; padding: 2px 0; }
.pick.big { font-size: 22px; line-height: 1.05; letter-spacing: -.02em; color: var(--ink-2); }
.pick svg { width: 10px; height: 6px; color: var(--g1); flex: none; }
.pick:not(.big) { margin-top: 7px; }
.pick.big svg { width: 11px; height: 7px; margin-top: 3px; }
.pick select {
  position: absolute; inset: -6px -10px; width: calc(100% + 20px); height: calc(100% + 12px);
  opacity: 0; font-size: 16px; /* 16px stops iOS zooming in on focus */
  appearance: none; -webkit-appearance: none; border: 0; cursor: pointer;
}
.pick:has(select:focus-visible) { outline: 1.5px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.mic {
  display: flex; align-items: center; gap: 9px;
  height: 40px; padding: 0 14px 0 12px; border-radius: 20px;
  background: var(--chip); font-size: 14px; font-weight: 500;
}
.mic svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.mic svg rect { fill: currentColor; }
.mic .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--g2); transition: background .3s; }
.mic[aria-pressed="true"] .dot { background: var(--live); }
.mic.busy .dot { background: var(--accent); animation: pulse 1s ease-in-out infinite; }
.mic.busy { color: var(--g1); }
@keyframes pulse { 50% { opacity: .25; transform: scale(.7); } }

/* The gradient field. Blob positions are driven from JS by the same sprung
   pitch value as the scale needle; CSS only styles them. */
.field {
  position: relative; flex: 1; min-height: 190px;
  border-radius: 28px; overflow: hidden;
  /* Safari leaks blurred layers past rounded corners; clip explicitly */
  clip-path: inset(0 round 28px);
  -webkit-mask-image: -webkit-radial-gradient(white, black);
  background: #574845;
  isolation: isolate;
  transition: opacity .8s;
}
.blob {
  position: absolute; left: 0; top: 0;
  border-radius: 50%;
  filter: blur(26px);
  will-change: transform;
  transition: filter 1s;
}
/* Muted, dusty fields. Colours are "r, g, b" so JS can recolour the glow. */
.blob { --c: 0, 0, 0; background: radial-gradient(closest-side, rgb(var(--c)), rgba(var(--c), .75) 45%, rgba(var(--c), 0)); }
.blob.halo    { --c: 240, 200, 174; }
.blob.ember-l, .blob.ember-r { --c: 236, 104, 80; }
.blob.dark-l, .blob.dark-r, .blob.dark-b { --c: 52, 48, 48; }
.blob.glow    { --c: 150, 200, 166; }
.field::after {
  /* soft paper-coloured edges, as in the reference */
  content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 0 36px 6px rgba(40,36,36,.35);
}
.grain {
  position: absolute; inset: 0; z-index: 3; pointer-events: none;
  opacity: .5; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .5 0 0 0 0 .5 0 0 0 0 .5 0 0 0 1.4 -.2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.focal { position: absolute; top: 0; bottom: 0; z-index: 4; pointer-events: none; }
.focal { left: 0; width: 1.5px; margin-left: -.75px; background: rgba(255,255,255,.85); transition: opacity .6s; }
.focal b {
  position: absolute; left: 50%; top: 53%;
  width: 18px; height: 18px; margin: -9px 0 0 -9px; border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 14px rgba(255,255,255,.18), 0 0 0 30px rgba(255,255,255,.08);
  transition: box-shadow .5s;
}
.field.tuned .focal b { box-shadow: 0 0 0 18px rgba(255,255,255,.28), 0 0 0 40px rgba(255,255,255,.12); }
.field.idle .focal { opacity: 0; }
.field.idle .blob { filter: blur(30px); }

/* Reading */
.reading { text-align: center; padding-top: 14px; }
.note { font-size: 84px; font-weight: 700; line-height: .95; letter-spacing: -.02em; transition: color .4s; }
.note sup { font-size: 18px; font-weight: 500; color: var(--g1); vertical-align: top; margin-left: 2px; position: relative; top: 8px; }
.note.idle { color: var(--g2); }
.note.idle sup { visibility: hidden; }
.note.held { color: var(--g1); }
.hz { font-size: 17px; color: var(--g1); font-variant-numeric: tabular-nums; margin-top: 2px; }
.cents { font-size: 44px; font-weight: 400; letter-spacing: -.01em; line-height: 1.1; margin-top: 8px; font-variant-numeric: tabular-nums; min-height: 48px; }
.cents.dim { color: var(--g2); }
.status { font-size: 17px; color: var(--g1); min-height: 24px; transition: color .3s; }
.status.ok, .cents.ok { color: var(--green); }

/* Cents scale, -50 to +50 */
.scale { position: relative; margin: 16px 18px 0; }
.ticks { position: relative; height: 34px; display: flex; justify-content: space-between; align-items: center; }
.ticks span { width: 1px; height: 14px; background: var(--g2); }
.ticks span.major { height: 22px; background: var(--g1); }
.ticks span.zero { width: 2px; height: 34px; background: var(--ink); transition: background .3s; }
.scale.ok .ticks span.zero { background: var(--green); }
.needle {
  position: absolute; left: 0; top: -4px; bottom: -4px; width: 2px; margin-left: -1px;
  background: var(--accent);
  opacity: 0; transition: opacity .4s, background .3s;
}
.needle::before {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 19px; height: 19px; margin: -9.5px 0 0 -9.5px; border-radius: 50%;   /* centred on the line, border included */
  background: var(--accent); border: 2.5px solid var(--panel);
  box-shadow: 0 0 0 10px rgba(226,96,79,.12), 0 0 24px 12px rgba(226,96,79,.14);
  transition: background .3s, box-shadow .3s;
}
.scale.live .needle { opacity: 1; }
.scale.ok .needle, .scale.ok .needle::before { background: var(--green); }
.scale.ok .needle::before { box-shadow: 0 0 0 10px rgba(47,184,101,.14), 0 0 24px 12px rgba(47,184,101,.14); }
.nums { position: relative; height: 40px; margin-top: 6px; font-size: 13px; color: var(--g1); font-variant-numeric: tabular-nums; }
.nums span { position: absolute; left: calc(var(--p) * 100%); transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 2px; }
.nums small { font-size: 13px; }

/* Strings */
.strings { display: flex; justify-content: center; gap: 12px; padding: 12px 0 4px; }
.strings button {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--chip); font-size: 16px; font-weight: 500; text-align: center;
  transition: background .25s, color .25s, transform .15s;
}
.strings button:active { transform: scale(.94); }
.strings button.on { background: var(--accent-soft); }
.strings button.ok { background: var(--ok-soft); }
.strings button.playing { box-shadow: inset 0 0 0 1.5px var(--accent); }

.gear { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--chip); color: var(--ink); }
.gear:active, .view-btn:active { transform: scale(.94); }
.gear svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- Dock ---------- */

.dock {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 2px 2px;
}
.dock:has(#installBtn[hidden]) { justify-content: center; }
.add-home {
  display: flex; align-items: center; gap: 8px;
  height: 40px; padding: 0 16px 0 10px; border-radius: 20px;
  background: var(--ink); color: var(--on-ink); font-size: 14px; font-weight: 600;
}
.add-home img { width: 20px; height: 20px; border-radius: 6px; }
.add-home:active, .mic:active { transform: scale(.97); }

/* ---------- Modes ---------- */

:root:not([data-view="metronome"]) .metro-only,
:root[data-view="metronome"] .tuner-only { display: none !important; }
/* Header actions: the mode icon sits bare next to the gear, which gets a filled circle */
.actions { display: flex; align-items: center; gap: 4px; margin-top: -2px; }
.view-btn { width: 44px; height: 44px; display: grid; place-items: center; color: var(--ink); }
.view-btn svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.view-btn .i-metro circle { fill: currentColor; stroke: none; }
.view-btn .i-fork, :root[data-view="metronome"] .view-btn .i-metro { display: none; }
:root[data-view="metronome"] .view-btn .i-fork { display: block; }

/* ---------- Metronome ---------- */

.metro {
  flex: 1; min-height: 0;
  display: flex; flex-direction: column; justify-content: center; gap: 26px;
  padding: 0 6px;
}
.beats { display: flex; justify-content: center; align-items: center; gap: 16px; height: 28px; }
.beats i {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--chip);
  transition: background .25s, transform .25s;
}
.beats i.accent { width: 20px; height: 20px; }
.beats i.hit { background: var(--ink); transform: scale(1.3); transition: none; }
.beats i.accent.hit { background: var(--accent); }

.tempo { text-align: center; }
.bpm { font-size: 112px; font-weight: 700; line-height: .95; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.bpm small { font-size: 17px; font-weight: 500; letter-spacing: 0; color: var(--g1); margin-left: 6px; }
.tempo-name { font-size: 17px; color: var(--g1); margin-top: 6px; }

.tempo-ctrl { display: flex; align-items: center; gap: 14px; }
.tempo-ctrl input {
  flex: 1; height: 28px; margin: 0; background: none;
  -webkit-appearance: none; appearance: none;
}
.tempo-ctrl input::-webkit-slider-runnable-track { height: 6px; border-radius: 3px; background: var(--chip); }
.tempo-ctrl input::-moz-range-track { height: 6px; border-radius: 3px; background: var(--chip); }
.tempo-ctrl input::-webkit-slider-thumb {
  -webkit-appearance: none; width: 26px; height: 26px; margin-top: -10px; border-radius: 50%;
  background: var(--ink); border: 3px solid var(--panel); box-shadow: 0 1px 4px var(--shadow);
}
.tempo-ctrl input::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: var(--ink); border: 3px solid var(--panel); }
.metro .group { padding: 0; }

.dock.metro-only { justify-content: center; align-items: center; padding: 8px 18px 6px; }
.play {
  width: 78px; height: 78px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--ink); color: var(--on-ink);
  transition: transform .15s;
}
.play:active { transform: scale(.95); }
.play svg { width: 30px; height: 30px; fill: currentColor; }
/* Optical centring: the triangle's centroid, not its box, sits on the button's centre */
.play .i-play { margin-left: 1.25px; }
.play .i-stop, .play[aria-pressed="true"] .i-play { display: none; }
.play[aria-pressed="true"] .i-stop { display: block; }

/* ---------- Bottom drawers (settings, install steps) ---------- */

.overlay {
  position: fixed; inset: 0; z-index: 10;
  display: flex; align-items: flex-end; justify-content: center;
  background: rgba(30,26,24,0);
  transition: background .3s;
}
.overlay.open { background: var(--scrim); }
.sheet {
  width: 100%; max-width: 480px; max-height: 88dvh; overflow-y: auto;
  padding: 10px 22px calc(env(safe-area-inset-bottom) + 20px);
  border-radius: 28px 28px 0 0;
  background: var(--sheet);
  box-shadow: 0 -10px 40px var(--shadow);
  transform: translateY(100%);
  transition: transform .35s cubic-bezier(.2,.8,.2,1);
}
.overlay.open .sheet { transform: none; }
.grabber { display: block; width: 38px; height: 5px; margin: 0 auto 16px; border-radius: 3px; background: var(--g2); }
.sheet-title { font-size: 22px; font-weight: 700; letter-spacing: -.02em; }
.sheet-sub { font-size: 15px; color: var(--g1); margin-top: 4px; }
.sheet-done {
  width: 100%; height: 50px; border-radius: 25px; margin-top: 8px;
  background: var(--ink); color: var(--on-ink); font-size: 16px; font-weight: 600; text-align: center;
}

/* Bottom-of-drawer buttons share the row; one alone fills it */
.sheet-actions { display: flex; gap: 10px; margin-top: 8px; }
.sheet-actions .sheet-done { flex: 1; margin-top: 0; font-size: 15px; display: grid; place-items: center; text-decoration: none; }
.sheet-done.secondary { background: var(--chip); color: var(--ink); }

.steps { list-style: none; padding: 0; margin: 22px 0 24px; display: grid; gap: 16px; }
.steps li { display: flex; align-items: center; gap: 12px; font-size: 16px; line-height: 1.35; }
.steps li p { flex: 1; }
.steps li b { font-weight: 600; }
.steps li small { display: block; font-size: 13px; color: var(--g1); margin-top: 2px; }
.steps li > span {
  width: 26px; height: 26px; border-radius: 50%; flex: none;
  display: grid; place-items: center;
  background: var(--chip); font-size: 13px; font-weight: 600;
}
.share { width: 20px; height: 20px; color: #0A84FF; vertical-align: -4px; }
.glyph { display: inline-block; padding: 0 6px; border-radius: 6px; background: var(--chip); font-weight: 700; letter-spacing: .05em; }

/* Settings content */
.s-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.done { padding: 10px 0 10px 16px; font-weight: 600; color: var(--accent); }
.group { padding: 14px 0; }
.group + .group { border-top: 1px solid var(--line); }
.label { font-size: 13px; font-weight: 500; color: var(--g1); margin-bottom: 10px; }

/* Segmented control */
.seg { display: flex; padding: 3px; border-radius: 14px; background: var(--chip); }
.seg button {
  flex: 1; height: 38px; border-radius: 11px; text-align: center;
  font-size: 15px; font-weight: 500; color: var(--g1);
  transition: background .2s, color .2s, box-shadow .2s;
}
.seg button.on { background: var(--raised); color: var(--ink); box-shadow: 0 1px 4px var(--shadow); }

/* Reference pitch stepper */
.ref { display: flex; align-items: center; gap: 10px; }
.step {
  width: 40px; height: 40px; border-radius: 50%; flex: none;
  display: grid; place-items: center; text-align: center;
  background: var(--chip); font-size: 22px; line-height: 1; color: var(--ink);
}
.ref-val { flex: 1; text-align: center; font-size: 15px; color: var(--g1); }
.ref-val b { font-size: 30px; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; letter-spacing: -.02em; margin: 0 2px; }
.reset { padding: 10px 0 10px 6px; font-size: 14px; font-weight: 500; color: var(--g1); }

@media (max-height: 740px) {
  .top { padding-bottom: 10px; }
  .note { font-size: 64px; }
  .cents { font-size: 34px; min-height: 38px; margin-top: 2px; }
  .scale { margin-top: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  .overlay, .sheet, .blob, .focal, .needle { transition: none; }
  .mic.busy .dot { animation: none; }
  .beats i { transition: none; }
}