:root {
  --bg: #f6f1e7;
  --card: #fffdf8;
  --ink: #2b2420;
  --muted: #7a6f66;
  --line: #d9cfc0;
  --accent: #a4502c;
  --good: #2f7d4f;
  --bad: #c0392b;
  --warn: #c98a12;
  --radius: 14px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1916;
    --card: #2a2420;
    --ink: #f1e9df;
    --muted: #a99c90;
    --line: #4a4038;
    --accent: #e08a5f;
    --good: #5cc28a;
    --bad: #ef6b5b;
    --warn: #e6b04a;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100dvh;
  padding-bottom: calc(64px + env(safe-area-inset-bottom));
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(10px + env(safe-area-inset-top)) 16px 6px;
  max-width: 560px;
  margin: 0 auto;
}

h1 { font-size: 20px; margin: 0; }
h2 { font-size: 17px; margin: 0 0 6px; }

.stage { display: flex; flex-direction: column; font-size: 12px; color: var(--muted); }
.stage select {
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 6px;
}

main { max-width: 560px; margin: 0 auto; padding: 0 12px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  margin: 10px 0;
}

.cardtop { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 14px; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 5px 10px; font-size: 13px; background: transparent; }
.seg button.on { background: var(--accent); color: #fff; }

button {
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 14px;
  cursor: pointer;
  touch-action: manipulation;
}
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.link { border: 0; background: none; color: var(--muted); text-decoration: underline; padding: 6px 0; font-size: 14px; }
button:disabled { opacity: 0.5; }

.row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 10px; }

/* Staff */
.staffbox { display: flex; justify-content: center; margin: 4px 0; }
.staffbox svg { width: 100%; max-width: 280px; height: auto; }
.staffbox.wide svg { max-width: 100%; }
.small-staff svg { max-width: 200px; }
@media (max-height: 700px) {
  .staffbox svg { max-width: 230px; }
}
.staff .lines line, .staff .ledger { stroke: var(--ink); stroke-width: 1; }
.staff .clef { fill: var(--ink); }
.staff .acc line { stroke: var(--ink); stroke-width: 1.1; }
.staff .acc line.thick { stroke-width: 2.4; }
.staff .note ellipse { fill: var(--ink); }
.staff .note .stem { stroke: var(--ink); stroke-width: 1.3; }
.staff .label { fill: var(--muted); font-size: 12px; font-family: inherit; }
.staff .note.current ellipse { fill: var(--accent); }
.staff .note.current .stem { stroke: var(--accent); }
.staff .note.done ellipse { fill: var(--good); }
.staff .note.done .stem { stroke: var(--good); }
.staff .note.missed ellipse { fill: var(--warn); }
.staff .note.missed .stem { stroke: var(--warn); }
.staff .note.landmark ellipse { fill: var(--muted); opacity: 0.55; }
.staff .note.landmark .stem { stroke: var(--muted); opacity: 0.55; }
.staff .note.ghost ellipse { fill: var(--bad); opacity: 0.6; }
.staff .note.ghost .stem { stroke: var(--bad); opacity: 0.6; }
.staff .note.ghost .ledger { stroke: var(--bad); opacity: 0.6; }

.prompt { text-align: center; margin: 6px 0 10px; min-height: 1.4em; }
.small { font-size: 14px; color: var(--muted); }
.pad { padding: 0 6px; }

/* Fingerboard answer pad */
.board {
  display: grid;
  grid-template-columns: 54px repeat(4, 1fr);
  gap: 6px;
  align-items: center;
}
.board .head { text-align: center; font-weight: 600; font-size: 14px; }
.board .rowlabel { font-size: 13px; color: var(--muted); text-align: right; padding-right: 2px; }
.board button { padding: 0; height: 42px; font-size: 14px; position: relative; }
.board button::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -4px;
  bottom: -4px;
  width: 2px;
  background: var(--line);
  transform: translateX(-50%);
  z-index: 0;
}
.board button span { position: relative; z-index: 1; }
.board button.right { background: var(--good); border-color: var(--good); color: #fff; }
.board button.wrong { background: var(--bad); border-color: var(--bad); color: #fff; }
.board .gap { grid-column: 2 / 6; text-align: center; font-size: 12px; color: var(--muted); }

.names { display: grid; grid-template-columns: repeat(auto-fit, minmax(56px, 1fr)); gap: 8px; }
.names button { height: 48px; font-size: 18px; }
.names button.right { background: var(--good); border-color: var(--good); color: #fff; }
.names button.wrong { background: var(--bad); border-color: var(--bad); color: #fff; }

.reveal { text-align: center; margin: 0 0 10px; }
.reveal .verdict { font-weight: 600; font-size: 18px; }
.reveal .verdict.good { color: var(--good); }
.reveal .verdict.bad { color: var(--bad); }
.reveal .why { color: var(--muted); font-size: 14px; margin: 4px 0 0; }

/* Progress grid */
.progress summary { cursor: pointer; font-weight: 600; }
#grid {
  display: grid;
  grid-template-columns: 54px repeat(4, 1fr);
  gap: 6px;
  margin: 12px 0 6px;
  font-size: 13px;
  align-items: center;
}
#grid .cell {
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  font-size: 13px;
}
#grid .cell.locked { opacity: 0.3; }
#grid .head { text-align: center; font-weight: 600; }
#grid .rowlabel { color: var(--muted); text-align: right; }
.check { display: flex; gap: 8px; align-items: center; margin: 8px 0; font-size: 15px; }

.stats { display: flex; justify-content: space-around; text-align: center; margin: 10px 0; }
.stats b { display: block; font-size: 24px; }
.stats span { font-size: 13px; color: var(--muted); }

/* Play */
.meter { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin: 0 auto; max-width: 240px; }
#level { height: 100%; width: 0; background: var(--accent); transition: width 60ms linear; }
#playmsg.bad { color: var(--bad); }
#playmsg.good { color: var(--good); }
.tend { margin: 6px 0; }

/* Tuner */
.tuner { text-align: center; }
.tnote { font-size: 56px; font-weight: 700; line-height: 1.1; }
.twhere { color: var(--muted); min-height: 1.4em; }
.needle { position: relative; height: 34px; margin: 14px 8px 2px; }
.needle .scale {
  position: absolute; inset: 15px 0 auto 0; height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, var(--bad), var(--warn) 30%, var(--good) 45%, var(--good) 55%, var(--warn) 70%, var(--bad));
}
.needle .pointer {
  position: absolute; top: 0; left: 50%; width: 4px; height: 34px; margin-left: -2px;
  border-radius: 2px; background: var(--ink); transition: left 90ms linear; opacity: 0.25;
}
.needle .pointer.live { opacity: 1; }
.ticks { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin: 0 8px; }
#drones button { flex: 1; }
#drones button.on { background: var(--accent); border-color: var(--accent); color: #fff; }

nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background: var(--card);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
nav button {
  flex: 1;
  border: 0;
  border-radius: 0;
  background: none;
  padding: 16px 0;
  font-weight: 600;
  color: var(--muted);
}
nav button.active { color: var(--accent); }