/* Openstring styles. Light and dark, no webfonts, nothing fetched. */

:root {
  --bg: #f7f6f3;
  --panel: #ffffff;
  --ink: #1d1c1a;
  --ink-soft: #5d5a54;
  --line: #e2ded6;
  --accent: #2f6f4f;
  --accent-soft: #e6f0ea;
  --good: #2f7d54;
  --warn: #b1791f;
  --bad: #b03b34;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 6px 20px rgba(0,0,0,.05);
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16181a;
    --panel: #1e2124;
    --ink: #eceae6;
    --ink-soft: #a3a29e;
    --line: #32363a;
    --accent: #62b98c;
    --accent-soft: #23342b;
    --good: #62b98c;
    --warn: #d9a441;
    --bad: #e07a72;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 6px 20px rgba(0,0,0,.3);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

h2 { font-size: 1.05rem; margin: 0 0 .5rem; letter-spacing: -.01em; }
p { margin: .4rem 0; }
.muted { color: var(--ink-soft); }
.small { font-size: .82rem; }

/* ------------------------------------------------------------------ chrome */

.topbar {
  display: flex; align-items: center; gap: 1rem;
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky; top: 0; z-index: 5;
  flex-wrap: wrap;
}
.brand { font-weight: 650; letter-spacing: -.02em; }
.tabs { display: flex; gap: .25rem; margin-inline: auto; }
.tab {
  border: 0; background: transparent; color: var(--ink-soft);
  padding: .4rem .8rem; border-radius: 999px; cursor: pointer; font: inherit;
}
.tab:hover { background: var(--bg); color: var(--ink); }
.tab.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.mic-state { display: flex; align-items: center; gap: .4rem; font-size: .82rem; color: var(--ink-soft); }
.mic-state .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.mic-state.live .dot { background: var(--good); box-shadow: 0 0 0 3px color-mix(in srgb, var(--good) 22%, transparent); }
.mic-state.error .dot { background: var(--bad); }

main { max-width: 720px; margin: 0 auto; padding: 1rem; }
.view { display: none; }
.view.is-active { display: block; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.btn {
  font: inherit; padding: .5rem .9rem; border-radius: 8px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn.primary:hover { filter: brightness(1.07); color: #fff; }
.btn.small { padding: .35rem .7rem; font-size: .85rem; }
.btn.danger:hover { border-color: var(--bad); color: var(--bad); }
.btn.file { display: inline-block; }
.controls { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; margin-top: .9rem; }
.check { display: flex; align-items: center; gap: .35rem; font-size: .88rem; color: var(--ink-soft); }

/* -------------------------------------------------------------- reading */

.stage-bar { display: flex; justify-content: space-between; gap: 1rem; align-items: center; margin-bottom: .8rem; }
.stage-title { font-weight: 650; }
.stage-blurb { font-size: .86rem; color: var(--ink-soft); max-width: 46ch; }
.stage-mastery { text-align: center; flex: 0 0 auto; }
.ring {
  width: 52px; height: 52px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: .8rem; font-weight: 650;
  background: conic-gradient(var(--accent) calc(var(--pct,0) * 1%), var(--line) 0);
}
.ring span {
  width: 40px; height: 40px; border-radius: 50%; background: var(--panel);
  display: grid; place-items: center;
}

.drill { text-align: center; }
.staff-host { min-height: 152px; display: grid; place-items: center; }

svg.staff { width: min(100%, 320px); height: auto; }
.staff-line { stroke: var(--ink); stroke-width: 1.1; opacity: .75; }
.clef { fill: none; stroke: var(--ink); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.clef-eight { fill: var(--ink); font-size: 11px; font-family: inherit; }
.accidental { fill: var(--ink); font-size: 19px; }
.notehead { fill: var(--ink); }
.notehead.correct { fill: var(--good); }
.notehead.wrong { fill: var(--bad); }
.stem { stroke: var(--ink); stroke-width: 1.6; }
.staff-label { fill: var(--ink-soft); font-size: 11px; }

.verdict { min-height: 3.1rem; margin: .6rem 0 .2rem; }
.verdict-main { font-size: 1.05rem; font-weight: 600; }
.verdict-main.good { color: var(--good); }
.verdict-main.bad { color: var(--bad); }
.verdict-sub { font-size: .86rem; color: var(--ink-soft); }

.heard { display: grid; gap: .4rem; justify-items: center; margin: .5rem 0; }
.heard-note { font-size: 1.6rem; font-weight: 300; font-variant-numeric: tabular-nums; min-height: 2rem; letter-spacing: -.02em; }
.tuner { position: relative; width: min(100%, 260px); height: 6px; background: var(--line); border-radius: 3px; }
.tuner-needle {
  position: absolute; top: -3px; left: 50%; width: 3px; height: 12px;
  background: var(--accent); border-radius: 2px; transform: translateX(-50%);
  transition: left .08s linear;
}
.tuner-centre { position: absolute; top: -2px; left: 50%; width: 1px; height: 10px; background: var(--ink); opacity: .3; }
.level { width: min(100%, 260px); height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; }
.level-fill { height: 100%; width: 0; background: var(--accent); transition: width .08s linear; }

.hint-host { margin-top: .7rem; display: grid; place-items: center; }
svg.fretboard { width: min(100%, 300px); height: auto; }
.fb-string { stroke: var(--ink); opacity: .35; stroke-width: 1; }
.fb-fret { stroke: var(--ink); opacity: .25; stroke-width: 1; }
.fb-nut { stroke: var(--ink); opacity: .8; stroke-width: 3; }
.fb-label, .fb-num { fill: var(--ink-soft); font-size: 9px; }
.fb-dot { fill: var(--accent); }
.fb-dot.wrong { fill: var(--bad); opacity: .65; }

.session .row { display: flex; justify-content: space-between; padding: .2rem 0; font-size: .9rem; }
.advice { font-size: .88rem; color: var(--ink-soft); border-left: 3px solid var(--accent-soft); padding-left: .7rem; }

/* --------------------------------------------------------------- rhythm */

.rhythm-picker { display: grid; gap: .7rem; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin: .8rem 0; }
.rhythm-picker label { display: grid; gap: .25rem; font-size: .85rem; color: var(--ink-soft); }
.rhythm-picker select, .rhythm-picker input { font: inherit; }
.rhythm-picker select { padding: .35rem; border-radius: 6px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); }

.rhythm-strip {
  position: relative; height: 74px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); margin: .6rem 0; overflow: hidden;
}
.rs-beat { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--line); }
.rs-beat.bar { background: var(--ink); opacity: .35; }
.rs-note {
  position: absolute; top: 22px; width: 13px; height: 13px; border-radius: 50%;
  background: var(--ink); opacity: .8; transform: translateX(-50%);
}
.rs-note.hit { background: var(--good); opacity: 1; }
.rs-note.miss { background: var(--bad); opacity: 1; }
.rs-played { position: absolute; top: 46px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); transform: translateX(-50%); }
.rs-cursor { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--accent); opacity: .8; }

.timing-plot { display: flex; gap: 3px; align-items: flex-end; height: 60px; margin: .6rem 0; }
.tp-bar { flex: 1; background: var(--accent-soft); position: relative; border-radius: 2px 2px 0 0; }
.tp-bar span { position: absolute; left: 0; right: 0; background: var(--accent); border-radius: 2px; }

.note-box { margin-top: 1rem; font-size: .86rem; color: var(--ink-soft); }
.note-box summary { cursor: pointer; color: var(--accent); }
.calib { display: grid; gap: .25rem; margin-top: .6rem; }

/* ------------------------------------------------------------- progress */

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: .8rem; }
.stat { background: var(--bg); border-radius: 8px; padding: .6rem; text-align: center; }
.stat b { display: block; font-size: 1.4rem; font-weight: 600; letter-spacing: -.02em; }
.stat span { font-size: .76rem; color: var(--ink-soft); }

.heatmap-host { overflow-x: auto; }
table.heatmap { border-collapse: collapse; font-size: .74rem; }
table.heatmap th { color: var(--ink-soft); font-weight: 500; padding: 2px 4px; }
table.heatmap td { padding: 1px; }
.hm-cell { width: 26px; height: 22px; border-radius: 4px; background: var(--line); display: grid; place-items: center; font-size: .66rem; color: var(--ink-soft); }
.hm-cell.good { background: color-mix(in srgb, var(--good) 65%, transparent); color: #fff; }
.hm-cell.slow { background: color-mix(in srgb, var(--warn) 60%, transparent); color: #fff; }
.hm-cell.bad  { background: color-mix(in srgb, var(--bad) 60%, transparent); color: #fff; }
/* Positions outside this stage: shown for orientation, but plainly not pending. */
.hm-cell.off { background: transparent; border: 1px dashed var(--line); }

.weak-list { margin: 0; padding-left: 1.2rem; }
.weak-list li { margin: .2rem 0; font-size: .9rem; }

.stage-list { display: grid; gap: .4rem; margin-top: .7rem; }
.stage-row { display: flex; gap: .6rem; align-items: baseline; font-size: .88rem; padding: .4rem .6rem; border-radius: 8px; background: var(--bg); }
.stage-row.current { background: var(--accent-soft); }
.stage-row .n { color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.stage-row .done { color: var(--good); }

.foot { text-align: center; font-size: .8rem; color: var(--ink-soft); padding: 1.5rem 1rem 2.5rem; }

@media (max-width: 520px) {
  .tabs { order: 3; width: 100%; justify-content: center; }
  .mic-state { margin-left: auto; }
}

/* ------------------------------------------------------------ first run */

.welcome {
  position: fixed; inset: 0; z-index: 50;
  background: var(--bg);
  overflow-y: auto;
  display: grid; place-items: start center;
  padding: 2rem 1rem 3rem;
}
.welcome[hidden] { display: none; }
.welcome-inner { max-width: 560px; }
.welcome h1 { font-size: clamp(1.5rem, 4.5vw, 2.1rem); line-height: 1.15; letter-spacing: -.025em; margin: .3rem 0 .6rem; }
.lede { font-size: 1.05rem; color: var(--ink-soft); margin-bottom: 1.4rem; }

.need { list-style: none; padding: 0; margin: 0 0 1.3rem; display: grid; gap: .75rem; }
.need li { display: flex; gap: .7rem; align-items: flex-start; font-size: .92rem; }
.need li span { font-size: 1.3rem; line-height: 1.2; flex: 0 0 auto; }
.need li div { color: var(--ink-soft); }
.need li strong { color: var(--ink); font-weight: 600; }

.privacy {
  background: var(--accent-soft); border-radius: var(--radius);
  padding: .8rem .9rem; font-size: .88rem; color: var(--ink-soft);
}
.privacy strong { color: var(--ink); }

.welcome-actions { display: flex; gap: .6rem; flex-wrap: wrap; margin: 1.3rem 0 1rem; }
.btn.big { padding: .7rem 1.2rem; font-size: 1rem; }

.newbie { font-size: .88rem; color: var(--ink-soft); border-left: 3px solid var(--accent-soft); padding-left: .7rem; }
.unsupported { font-size: .88rem; color: var(--bad); }

.help-btn {
  width: 24px; height: 24px; border-radius: 50%; flex: 0 0 auto;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink-soft);
  cursor: pointer; font: inherit; font-size: .8rem; line-height: 1; padding: 0;
}
.help-btn:hover { border-color: var(--accent); color: var(--accent); }

.storage-warn { font-size: .86rem; color: var(--bad); }

.backup-nudge {
  font-size: .86rem; color: var(--ink);
  background: color-mix(in srgb, var(--warn) 14%, transparent);
  border-radius: 8px; padding: .55rem .7rem;
}

/* ---------------------------------------------------------------- pieces */

.import-error { color: var(--bad); font-size: .88rem; }
.octave-note { font-size: .82rem; color: var(--ink-soft); border-left: 3px solid var(--line); padding-left: .6rem; }
.octave-note.warn { border-left-color: var(--warn); color: var(--ink); }

.chunk-label { font-size: .85rem; color: var(--ink-soft); margin-bottom: .3rem; }
.chunk-staff { display: flex; flex-wrap: wrap; gap: 2px; justify-content: center; min-height: 120px; }
.chunk-staff svg.staff.phrase { width: min(100%, 520px); }
.rest-mark { fill: var(--ink); opacity: .7; }

.layer-row { display: flex; gap: .35rem; flex-wrap: wrap; justify-content: center; margin: .5rem 0; }
.layer-chip {
  font-size: .74rem; padding: .18rem .5rem; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-soft);
}
.layer-chip.active { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.layer-chip.ok { background: color-mix(in srgb, var(--good) 18%, transparent); border-color: transparent; color: var(--good); }
.layer-chip.fail { background: color-mix(in srgb, var(--bad) 16%, transparent); border-color: transparent; color: var(--bad); }
.layer-chip.future { opacity: .45; }

.chunk-list { display: grid; gap: .3rem; }
.chunk-row {
  display: grid; grid-template-columns: 1fr auto auto; gap: .6rem; align-items: center;
  font-size: .85rem; padding: .4rem .6rem; border-radius: 8px; background: var(--bg);
}
.chunk-row.seam { border-left: 3px solid var(--warn); }
.chunk-row.current { background: var(--accent-soft); }
.chunk-row .bpm { font-variant-numeric: tabular-nums; color: var(--ink-soft); }
.chunk-bar { width: 70px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.chunk-bar span { display: block; height: 100%; background: var(--accent); }

.text-input {
  font: inherit; padding: .45rem .6rem; border-radius: 8px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  min-width: 200px; flex: 1 1 200px;
}
.sync-msg { font-size: .86rem; margin-top: .5rem; }
.sync-msg.ok { color: var(--good); }
.sync-msg.bad { color: var(--bad); }