:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #efeee9;
  --ink: #1d1d22;
  --ink-2: #55555e;
  --ink-3: #8a8a93;
  --line: #dddcd6;
  --accent: #6d5ce8;
  --accent-ink: #ffffff;
  --accent-soft: #e9e5fd;
  --bass: #3f2fb8;
  --played: #f0b44c;
  --good: #1f8a4c;
  --good-soft: #e1f3e8;
  --bad: #c43d3d;
  --bad-soft: #f9e3e3;
  --warn-soft: #fbf0d9;
  --key-white: #ffffff;
  --key-black: #2a2a30;
  --radius: 12px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171c;
    --surface: #212128;
    --surface-2: #2b2b33;
    --ink: #ececf1;
    --ink-2: #b4b4bf;
    --ink-3: #85858f;
    --line: #36363f;
    --accent: #8b7cf6;
    --accent-ink: #14141a;
    --accent-soft: #2f2a52;
    --bass: #b9afff;
    --played: #e0a640;
    --good: #4cc27f;
    --good-soft: #1d3527;
    --bad: #f06a6a;
    --bad-soft: #3d2222;
    --warn-soft: #3a3020;
    --key-white: #e9e9ee;
    --key-black: #101014;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.app {
  max-width: 760px;
  margin: 0 auto;
  padding: env(safe-area-inset-top) 16px calc(32px + env(safe-area-inset-bottom));
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 8px;
}

h1 { font-size: 1.15rem; margin: 0; letter-spacing: .01em; }
h2 { margin: 0 0 6px; }
h3 { margin: 0 0 12px; font-size: 1rem; }
h3 small { color: var(--ink-3); font-weight: 400; margin-left: 6px; }

nav {
  position: sticky;
  top: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  padding: 4px;
  margin-bottom: 14px;
  background: var(--surface-2);
  border-radius: var(--radius);
}

nav button {
  border: 0;
  background: transparent;
  padding: 10px 0;
  font-weight: 600;
  color: var(--ink-2);
}

nav button.on { background: var(--surface); color: var(--ink); box-shadow: 0 1px 2px rgb(0 0 0 / .12); }

button, .button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 14px;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  touch-action: manipulation;
}

button:disabled { opacity: .55; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
button.big { font-size: 1.2rem; padding: 14px 44px; }
button.ghost { background: transparent; }
button.ghost.on { border-color: var(--accent); color: var(--accent); }
button.good.on, button.good:not(:disabled):hover { background: var(--good-soft); border-color: var(--good); }
button.bad.on, button.bad:not(:disabled):hover { background: var(--bad-soft); border-color: var(--bad); }
button.link { border: 0; background: none; min-height: 0; padding: 0 6px; color: var(--accent); font-size: .85rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}

.start { text-align: center; padding: 36px 8px; }
.start p { color: var(--ink-2); }

.hint { color: var(--ink-3); font-size: .85rem; }

.banner {
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 12px;
  background: var(--surface-2);
}
.banner.good { background: var(--good-soft); color: var(--good); font-weight: 600; }
.banner.bad { background: var(--bad-soft); color: var(--bad); font-weight: 600; }
.banner.warn { background: var(--warn-soft); }
.banner b { color: var(--ink); }
.banner .meta { float: right; font-weight: 400; color: var(--ink-3); }

.badge {
  font-size: .78rem;
  color: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 99px;
  padding: 2px 10px;
}
.badge.live { color: var(--good); border-color: var(--good); }

.topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}
.root-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.pill { background: var(--accent-soft); border-radius: 99px; padding: 6px 12px; }
.score { color: var(--ink-2); font-variant-numeric: tabular-nums; }

.inv-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(64px, 1fr)); gap: 6px; margin-bottom: 14px; }
button.inv.on, button.q.on { background: var(--accent-soft); border-color: var(--accent); }

.group { margin-bottom: 12px; }
.group-label { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); margin-bottom: 6px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 6px; }
button.q { flex-direction: column; gap: 0; padding: 8px 4px; min-height: 58px; }
button.q b { font-size: 1.05rem; }
button.q small { color: var(--ink-3); font-size: .7rem; line-height: 1.2; text-align: center; }

.chord-name { font-size: 2.6rem; font-weight: 700; text-align: center; letter-spacing: .01em; }
.chord-sub { text-align: center; color: var(--ink-2); }
.formula { text-align: center; color: var(--ink-3); font-family: ui-monospace, monospace; font-size: .9rem; margin: 4px 0 12px; }
.mystery .chord-name { color: var(--ink-3); }
.reveal { animation: pop .25s ease-out; }
@keyframes pop { from { transform: scale(.97); opacity: .4; } }

.countdown { height: 6px; background: var(--surface-2); border-radius: 3px; overflow: hidden; margin: 18px 0 6px; }
.countdown div { height: 100%; background: var(--accent); border-radius: 3px; animation: drain linear forwards; }
@keyframes drain { from { width: 100%; } to { width: 0; } }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.actions .primary { margin-left: auto; }
.actions.center { justify-content: center; align-items: center; }

.piano { width: 100%; height: auto; max-height: 140px; display: block; }
.piano rect.white { fill: var(--key-white); stroke: var(--line); stroke-width: 1; }
.piano rect.black { fill: var(--key-black); }
.piano .on rect { fill: var(--accent); }
.piano .bass rect { fill: var(--bass); }
.piano .played rect { fill: var(--played); }
.piano text { font-size: 9px; font-weight: 600; fill: var(--accent-ink); }
@media (prefers-color-scheme: dark) { .piano .bass text { fill: #14141a; } }

.seg { display: flex; flex-wrap: wrap; gap: 4px; padding: 3px; background: var(--surface-2); border-radius: 10px; }
.seg button { flex: 1 1 auto; border: 0; background: transparent; min-height: 38px; color: var(--ink-2); }
.seg button.on { background: var(--surface); color: var(--ink); font-weight: 600; box-shadow: 0 1px 2px rgb(0 0 0 / .12); }

.field { margin-bottom: 12px; }
.field > span { display: block; font-size: .85rem; color: var(--ink-2); margin-bottom: 4px; }

.chips, .presets { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.presets { margin: 0 0 14px; }
button.chip { min-height: 36px; padding: 5px 12px; border-radius: 99px; color: var(--ink-2); }
button.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.toggle { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; cursor: pointer; }
.toggle input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--accent); flex: none; }
.toggle small { display: block; color: var(--ink-3); font-size: .8rem; }

.slider { display: block; padding: 6px 0; }
.slider span { display: flex; justify-content: space-between; font-size: .92rem; }
.slider b { font-variant-numeric: tabular-nums; }
.slider input { width: 100%; accent-color: var(--accent); }

.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.tile small { display: block; color: var(--ink-3); font-size: .78rem; }
.tile b { font-size: 1.5rem; font-variant-numeric: tabular-nums; }

table.stats { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.stats th { text-align: left; font-weight: 500; color: var(--ink-3); font-size: .75rem; padding: 0 4px 6px; }
table.stats td { padding: 6px 4px; border-top: 1px solid var(--line); white-space: nowrap; }
table.stats td:first-child { font-weight: 600; white-space: normal; }
.num { font-variant-numeric: tabular-nums; color: var(--ink-2); }
th.num, td.num { text-align: right; }
.meter { display: inline-block; vertical-align: middle; width: 64px; height: 6px; background: var(--surface-2); border-radius: 3px; margin-right: 6px; overflow: hidden; }
.meter span { display: block; height: 100%; background: var(--accent); border-radius: 3px; }

.daily { display: grid; grid-template-columns: repeat(14, 1fr); gap: 2px; align-items: end; }
.day { text-align: center; }
.bar-wrap { height: 90px; display: flex; align-items: flex-end; justify-content: center; border-bottom: 1px solid var(--line); }
.bar { width: 70%; max-width: 18px; background: var(--accent); border-radius: 4px 4px 0 0; min-height: 2px; }
.day small { font-size: .62rem; color: var(--ink-3); }

ul.conf { list-style: none; padding: 0; margin: 0; }
ul.conf li { display: flex; gap: 6px; align-items: baseline; padding: 6px 0; border-top: 1px solid var(--line); flex-wrap: wrap; }
ul.conf li .num { margin-left: auto; }

@media (max-width: 420px) {
  .chord-name { font-size: 2.1rem; }
  .meter { width: 36px; }
  table.stats th:nth-child(4), table.stats td:nth-child(4) { display: none; }
}

nav { grid-template-columns: repeat(6, 1fr); }
nav button { font-size: .9rem; padding: 10px 0; }
@media (max-width: 480px) { nav button { font-size: .78rem; } }

.imagine-prompt { color: var(--ink-2); text-align: center; font-size: .92rem; margin: 10px 0 0; }

.stats-filter { margin-bottom: 12px; }

.file-row { display: flex; gap: 6px; flex-wrap: wrap; }
input.name {
  flex: 1 1 140px;
  font: inherit;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px;
  min-width: 0;
}

textarea.prog {
  width: 100%;
  font: 1.05rem/1.5 ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  resize: vertical;
}
.err-text { color: var(--bad); }

.bars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin-top: 8px; }
@media (max-width: 480px) { .bars { grid-template-columns: repeat(2, 1fr); } }
.bar-cell {
  display: flex;
  gap: 3px;
  padding: 4px;
  border-left: 2px solid var(--line);
  min-height: 52px;
}
button.slot {
  flex: 1 1 0;
  min-width: 0;
  padding: 4px;
  font-weight: 600;
  font-size: .92rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  background: var(--surface-2);
  border-color: transparent;
}
button.slot.now { background: var(--accent); color: var(--accent-ink); }
button.slot.sel { border-color: var(--accent); }
button.slot.err { color: var(--bad); border-color: var(--bad); border-style: dashed; }
.banner.insight { background: var(--accent-soft); }