:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #1f2630;
  --border: #30363d;
  --fg: #e6edf3;
  --fg-dim: #8b949e;
  --accent: #2dd4bf;
  --accent-dim: #14b8a6;
  --good: #3fb950;
  --bad: #f85149;
  --warn: #d29922;
  --blue: #58a6ff;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 15px;
}
#app { display: flex; min-height: 100vh; }

/* ---------- nav ---------- */
#nav {
  width: 210px; flex: 0 0 210px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 14px 10px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.nav-title { font-weight: 700; font-size: 16px; margin: 4px 6px 14px; }
.nav-sec {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--fg-dim); margin: 14px 6px 4px;
}
#nav a {
  display: block; padding: 7px 10px; border-radius: 8px;
  color: var(--fg); text-decoration: none; font-size: 14px; margin: 1px 0;
}
#nav a:hover { background: var(--bg3); }
#nav a.active { background: var(--accent-dim); color: #04231f; font-weight: 600; }

/* ---------- main ---------- */
#view { flex: 1; padding: 22px 28px 80px; max-width: 900px; }
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 22px 0 8px; }
.subtitle { color: var(--fg-dim); margin-bottom: 18px; }

/* ---------- generic panels ---------- */
.panel {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 18px; margin-bottom: 14px;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.spread { justify-content: space-between; }
.muted { color: var(--fg-dim); font-size: 13px; }
code { background: var(--bg3); padding: 1px 5px; border-radius: 4px; font-size: 13px; }

/* ---------- buttons ---------- */
button {
  background: var(--bg3); color: var(--fg);
  border: 1px solid var(--border); border-radius: 9px;
  padding: 9px 16px; font-size: 15px; cursor: pointer;
  font-family: inherit;
}
button:hover:not(:disabled) { border-color: var(--fg-dim); }
button:disabled { opacity: 0.4; cursor: default; }
button.primary { background: var(--accent-dim); border-color: var(--accent-dim); color: #04231f; font-weight: 700; }
button.primary:hover:not(:disabled) { background: var(--accent); }
button.danger { border-color: var(--bad); color: var(--bad); }
button.big { font-size: 19px; padding: 14px 30px; border-radius: 12px; }
button.answer { min-width: 120px; font-size: 18px; padding: 14px 20px; }
button.sel { outline: 2px solid var(--accent); }

/* ---------- stage (trial area) ---------- */
.stage {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 14px;
  min-height: 300px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 18px;
  padding: 26px; text-align: center; margin-bottom: 14px;
}
.big-status { font-size: 34px; font-weight: 700; letter-spacing: 0.02em; }
.big-status.sing { color: var(--accent); animation: pulse 1s ease-in-out infinite; }
.big-status.listen { color: var(--blue); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.55; } }
.stage .question { font-size: 20px; color: var(--fg); }

/* VU meter */
.vu-wrap { width: 260px; height: 14px; background: var(--bg3); border-radius: 7px; overflow: hidden; }
.vu-bar { height: 100%; width: 0%; background: var(--accent); transition: width 0.05s linear; }

/* feedback */
.feedback { font-size: 17px; line-height: 1.55; }
.feedback .ok { color: var(--good); font-weight: 700; }
.feedback .no { color: var(--bad); font-weight: 700; }
.feedback .warn { color: var(--warn); font-weight: 600; }
.cents-big { font-size: 42px; font-weight: 800; }
.cents-big.good { color: var(--good); }
.cents-big.near { color: var(--warn); }
.cents-big.far { color: var(--bad); }

/* ---------- stats strip ---------- */
.stats-strip { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.stat-chip {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 14px; text-align: center; min-width: 92px;
}
.stat-chip .v { font-size: 19px; font-weight: 700; }
.stat-chip .l { font-size: 11px; color: var(--fg-dim); }

/* history dots */
.dots { display: flex; gap: 5px; flex-wrap: wrap; align-items: center; }
.dot { width: 13px; height: 13px; border-radius: 50%; background: var(--bg3); }
.dot.ok { background: var(--good); }
.dot.no { background: var(--bad); }
.dot.warn { background: var(--warn); }

/* ---------- config ---------- */
.config { display: flex; gap: 16px; flex-wrap: wrap; align-items: flex-end; }
.config label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--fg-dim); }
.config select, .config input {
  background: var(--bg3); color: var(--fg); border: 1px solid var(--border);
  border-radius: 7px; padding: 7px 9px; font-size: 14px; font-family: inherit;
}
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; }
.seg button { border: none; border-radius: 0; padding: 7px 13px; font-size: 14px; }
.seg button.on { background: var(--accent-dim); color: #04231f; font-weight: 600; }

/* ---------- tables ---------- */
table.grid { border-collapse: collapse; width: 100%; font-size: 14px; }
table.grid th, table.grid td { border: 1px solid var(--border); padding: 6px 10px; text-align: center; }
table.grid th { background: var(--bg3); font-weight: 600; }
td.good { color: var(--good); } td.bad { color: var(--bad); } td.warn { color: var(--warn); }

/* ---------- dashboard ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; margin-bottom: 16px; }
.card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 14px;
}
.card .v { font-size: 26px; font-weight: 800; }
.card .l { font-size: 12px; color: var(--fg-dim); margin-top: 2px; }
.card .hint { font-size: 11px; color: var(--fg-dim); margin-top: 6px; }
.bottleneck {
  border-left: 4px solid var(--accent); background: var(--bg2);
  border-radius: 10px; padding: 14px 18px; margin: 8px 0;
}
.bottleneck .name { font-size: 17px; font-weight: 700; color: var(--accent); }
canvas.chart { width: 100%; background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; }

/* baseline */
.test-card { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.test-card .done { color: var(--good); font-weight: 700; }
.progress-mini { font-variant-numeric: tabular-nums; color: var(--fg-dim); }

/* misc */
kbd {
  background: var(--bg3); border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 5px; padding: 0 6px; font-size: 12px; font-family: inherit;
}
#file-warning {
  position: fixed; inset: auto 20px 20px 20px; background: #3a2d10;
  border: 1px solid var(--warn); color: var(--fg); border-radius: 10px;
  padding: 14px 18px; font-size: 14px; line-height: 1.6; z-index: 99;
}
.pitch-live { font-size: 40px; font-weight: 800; font-variant-numeric: tabular-nums; }
.note-live { font-size: 22px; color: var(--accent); }
@media (max-width: 760px) {
  #app { flex-direction: column; }
  #nav { width: 100%; flex: none; height: auto; position: static; display: flex; flex-wrap: wrap; gap: 4px; }
  .nav-sec { display: none; }
  #view { padding: 14px; }
}