:root {
  --bg: #0f0d14;
  --bg-elev: #17151f;
  --bg-sunken: #0b0910;
  --border: #2a2634;
  --border-soft: #201d29;
  --text: #ece8f2;
  --text-dim: #a49cb5;
  --text-faint: #736b85;
  --accent: #b58cff;
  --accent-dim: #2c2140;
  --good: #5ddb9a;
  --warn: #ffc861;
  --bad: #ff7a85;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 12px;
  --radius-sm: 7px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f5fa;
    --bg-elev: #ffffff;
    --bg-sunken: #efecf4;
    --border: #ddd8e6;
    --border-soft: #e9e5f0;
    --text: #1d1a24;
    --text-dim: #5c5470;
    --text-faint: #8a82a0;
    --accent: #7d4fd8;
    --accent-dim: #ece2ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 600; }
code { font-family: var(--mono); font-size: 0.88em; }
.mono { font-family: var(--mono); }
em { color: var(--text); font-style: italic; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand h1 { font-size: 18px; letter-spacing: -0.015em; }
.tagline { margin: 1px 0 0; font-size: 12.5px; color: var(--text-faint); }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px; flex: none;
  background: linear-gradient(140deg, var(--accent), #ff8fb1);
}
.topbar-right { display: flex; align-items: center; gap: 8px; }

.pill {
  font-size: 12px; font-weight: 500;
  padding: 4px 11px; border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-sunken); color: var(--text-dim);
  white-space: nowrap;
}
.pill-good { color: var(--good); border-color: color-mix(in srgb, var(--good) 40%, transparent); background: color-mix(in srgb, var(--good) 12%, transparent); }
.pill-warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: color-mix(in srgb, var(--warn) 12%, transparent); }
.pill-bad  { color: var(--bad);  border-color: color-mix(in srgb, var(--bad) 40%, transparent);  background: color-mix(in srgb, var(--bad) 12%, transparent); }

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 380px);
  gap: 18px;
  padding: 18px 22px 8px;
  align-items: start;
  max-width: 1600px;
  margin: 0 auto;
}
@media (max-width: 1040px) { .layout { grid-template-columns: 1fr; } }

.stage { display: grid; gap: 16px; }
.side { display: grid; gap: 16px; }

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 15px 17px 17px;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.panel-head h2 { font-size: 13.5px; }
.panel-note { margin: 5px 0 12px; font-size: 12.5px; color: var(--text-faint); }
.count-badge {
  font: 500 12px/1 var(--mono);
  padding: 4px 8px; border-radius: 999px;
  background: var(--accent-dim); color: var(--accent);
}

/* ---------- coach card ---------- */
.coach {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.coach-head { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 8px; }
.coach-badge {
  font: 600 10.5px/1 inherit; letter-spacing: .07em; text-transform: uppercase;
  padding: 6px 9px; border-radius: 5px; flex: none; margin-top: 3px;
  background: var(--accent-dim); color: var(--accent);
}
.coach-badge.listening { background: color-mix(in srgb, var(--good) 16%, transparent); color: var(--good); animation: pulse 1.6s ease-in-out infinite; }
.coach-badge.playing   { background: color-mix(in srgb, var(--warn) 16%, transparent); color: var(--warn); }
.coach-badge.done      { background: color-mix(in srgb, var(--good) 16%, transparent); color: var(--good); }
@keyframes pulse { 50% { opacity: .45; } }

#coach-title { font-size: 20px; line-height: 1.3; letter-spacing: -0.015em; }
.coach-detail { margin: 0; font-size: 14px; color: var(--text-dim); max-width: 76ch; }
.coach-progress {
  height: 5px; margin-top: 14px; border-radius: 3px;
  background: var(--bg-sunken); overflow: hidden;
}
.coach-progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), #ff8fb1);
  transition: width .12s linear;
}

/* ---------- the keyboard ---------- */
.keyboard {
  position: relative;
  height: 200px;
  user-select: none;
  touch-action: none;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 10px 12px;
  overflow: hidden;
}
.kb-whites { display: flex; height: 100%; gap: 2px; }
.kb-blacks { position: absolute; inset: 10px 10px 12px; pointer-events: none; }

.kb-key {
  position: relative;
  display: flex; flex-direction: column; justify-content: flex-end; align-items: center;
  padding-bottom: 9px; gap: 4px;
  cursor: pointer;
  transition: background .05s, box-shadow .08s, transform .05s;
}
.kb-white {
  flex: 1;
  background: linear-gradient(180deg, #fbf9fd, #e8e3ef);
  border-radius: 0 0 6px 6px;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.14);
  color: #4a4358;
}
.kb-black {
  position: absolute; top: 0;
  height: 62%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #33303d, #16141c);
  border-radius: 0 0 5px 5px;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.5), 0 2px 4px rgba(0,0,0,.45);
  pointer-events: auto;
  color: #d8d2e4;
  z-index: 2;
}

.kb-label  { font: 600 10.5px/1 var(--mono); opacity: .55; pointer-events: none; }
.kb-finger {
  font: 700 11px/18px inherit;
  min-width: 18px; height: 18px; border-radius: 50%;
  pointer-events: none;
}
.kb-key .kb-finger:not(:empty) { background: var(--accent); color: #fff; }

/* middle C, permanently findable */
.kb-anchor {
  font: 700 8.5px/1 inherit; letter-spacing: .05em; text-transform: uppercase;
  color: var(--accent); pointer-events: none; white-space: nowrap;
}
.kb-white.is-middle-c { background: linear-gradient(180deg, #fbf9fd, #ded4ee); }

/* --- states, weakest first: whatever comes later wins --- */

/* what you are being asked to play */
.kb-key.is-target {
  box-shadow: inset 0 0 0 3px var(--accent), 0 0 14px color-mix(in srgb, var(--accent) 55%, transparent);
  z-index: 3;
}
.kb-white.is-target { background: linear-gradient(180deg, #f3e9ff, #ddc9ff); }
.kb-black.is-target { background: linear-gradient(180deg, #6a4b9c, #402c63); }
.kb-key.is-target .kb-label { opacity: 1; font-weight: 700; }

/* what you are pressing */
.kb-white.is-pressed, .kb-white.is-target.is-pressed {
  background: linear-gradient(180deg, #cfe0ff, #a9c4f5); transform: translateY(1px);
}
.kb-black.is-pressed, .kb-black.is-target.is-pressed {
  background: linear-gradient(180deg, #4a6ea8, #2c4570); transform: translateY(1px);
}

/* what the app is playing RIGHT NOW — must beat the target highlight, or a
   demonstration over highlighted keys shows nothing moving. */
.keyboard .kb-key.is-playing {
  box-shadow: inset 0 0 0 3px var(--warn), 0 0 22px color-mix(in srgb, var(--warn) 85%, transparent);
  transform: translateY(2px) scale(1.02);
  z-index: 4;
}
.keyboard .kb-white.is-playing { background: linear-gradient(180deg, #fff0cf, #ffc350); }
.keyboard .kb-black.is-playing { background: linear-gradient(180deg, #c8973c, #8a6420); }
.keyboard .kb-key.is-playing .kb-label { opacity: 1; font-weight: 700; }

/* graded feedback wins over everything */
.keyboard .kb-key.is-correct { box-shadow: inset 0 0 0 3px var(--good), 0 0 18px color-mix(in srgb, var(--good) 70%, transparent); z-index: 5; }
.keyboard .kb-key.is-wrong   { box-shadow: inset 0 0 0 3px var(--bad),  0 0 18px color-mix(in srgb, var(--bad) 70%, transparent);  z-index: 5; }

/* ---------- finger legend ---------- */
.finger-legend {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 11px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.legend-title { font-size: 12.5px; color: var(--text-faint); }
.legend-fingers { display: flex; gap: 6px; flex-wrap: wrap; }
.legend-finger {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 10px 4px 4px;
  background: var(--bg-sunken);
  border: 1px solid var(--border-soft); border-radius: 999px;
  font-size: 12px; color: var(--text-dim);
}
.legend-finger b {
  display: grid; place-items: center;
  width: 19px; height: 19px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: 11px;
}
.legend-hint { font-size: 12px; color: var(--text-faint); margin-left: auto; }

/* ---------- transport ---------- */
.transport {
  display: flex; flex-wrap: wrap; align-items: center; gap: 20px;
  padding: 13px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.transport-group { display: flex; align-items: center; gap: 9px; }
.transport-label { font-size: 12.5px; color: var(--text-faint); }
.transport-value { font-size: 13px; min-width: 3ch; }
.transport-note { font-size: 12.5px; color: var(--text-faint); }
.transport input[type="range"] { width: 130px; accent-color: var(--accent); }
.switch-row { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--text-dim); cursor: pointer; }
.switch-row input { accent-color: var(--accent); }

/* ---------- buttons ---------- */
.btn {
  font: 500 13px/1 inherit;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-sunken);
  color: var(--text);
  cursor: pointer;
  transition: border-color .12s, opacity .12s;
}
.btn:hover:not(:disabled) { border-color: var(--text-faint); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-sm { padding: 5px 9px; font-size: 12px; }
.btn-ghost { background: transparent; color: var(--text-dim); }

/* ---------- tool list ---------- */
.tool-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.tool-item {
  display: grid; grid-template-columns: 1fr auto; gap: 2px 10px;
  padding: 9px 12px;
  background: var(--bg-sunken);
  border: 1px solid var(--border-soft); border-radius: var(--radius-sm);
  animation: slide-in .22s ease-out;
}
@keyframes slide-in { from { opacity: 0; transform: translateY(-5px); } }
.tool-name { font: 600 12.5px/1.4 var(--mono); }
.tool-desc { font-size: 12px; color: var(--text-faint); grid-column: 1; }
.tool-tag {
  font: 500 10px/1 inherit; letter-spacing: .04em; text-transform: uppercase;
  padding: 4px 7px; border-radius: 4px; height: fit-content;
}
.tool-tag.listen { background: color-mix(in srgb, var(--good) 16%, transparent); color: var(--good); }
.tool-tag.play   { background: color-mix(in srgb, var(--warn) 16%, transparent); color: var(--warn); }
.tool-tag.show   { background: var(--accent-dim); color: var(--accent); }
.tool-tag.memory { background: color-mix(in srgb, var(--text-faint) 18%, transparent); color: var(--text-dim); }

/* ---------- activity ---------- */
.activity {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 5px;
  max-height: 34vh; overflow: auto;
}
.act-item {
  padding: 8px 11px;
  background: var(--bg-sunken);
  border: 1px solid var(--border-soft);
  border-left: 2px solid var(--text-faint);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  animation: slide-in .2s ease-out;
}
.act-item.ok    { border-left-color: var(--good); }
.act-item.miss  { border-left-color: var(--warn); }
.act-item.error { border-left-color: var(--bad); }
.act-tool { font: 600 12px/1.5 var(--mono); }
.act-detail { color: var(--text-dim); }
.act-empty, .history-empty { padding: 14px; text-align: center; color: var(--text-faint); font-size: 12.5px; }

/* ---------- history ---------- */
.history { display: grid; gap: 7px; }
.hist-row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 8px 11px; font-size: 12.5px;
  background: var(--bg-sunken);
  border: 1px solid var(--border-soft); border-radius: var(--radius-sm);
}
.hist-label { color: var(--text-dim); }
.hist-value { font-weight: 600; }

/* ---------- footer ---------- */
.footer { padding: 16px 22px 30px; max-width: 1600px; margin: 0 auto; }
.footer p { margin: 0; font-size: 12.5px; color: var(--text-faint); max-width: 78ch; }

/* =====================================================================
   Product shell — navigation, views, and everything the library needed.
   ===================================================================== */

/* ---------- navigation ---------- */
.nav { display: flex; gap: 2px; flex-wrap: wrap; }
.nav-item {
  font: 500 13px/1 inherit;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; gap: 7px;
  transition: color .12s, background .12s;
}
.nav-item:hover { color: var(--text); background: var(--bg-sunken); }
.nav-item.is-active {
  color: var(--text);
  background: var(--accent-dim);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}
.nav-count {
  font: 600 10.5px/1 var(--mono);
  padding: 2.5px 5px; border-radius: 999px;
  background: color-mix(in srgb, var(--text-faint) 22%, transparent);
  color: var(--text-dim);
}
.nav-item.is-active .nav-count { background: color-mix(in srgb, var(--accent) 28%, transparent); color: var(--accent); }

/* ---------- views ---------- */
.view[hidden] { display: none; }
.view-wide, .view-narrow {
  padding: 22px 22px 8px;
  margin: 0 auto;
  display: grid;
  gap: 18px;
  align-content: start;
}
.view-wide { max-width: 1600px; }
.view-narrow { max-width: 780px; }

.view-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 18px; flex-wrap: wrap;
}
.view-head h2 { font-size: 20px; letter-spacing: -0.015em; }
.view-lead { margin: 6px 0 0; font-size: 13.5px; color: var(--text-dim); max-width: 68ch; }
.view-hint {
  margin: 0; font-size: 12.5px; color: var(--text-faint);
  padding: 9px 13px; border-radius: var(--radius-sm);
  border: 1px dashed var(--border); background: var(--bg-sunken);
}

/* An inline button that reads as a link — used in prose to jump between views. */
.linkish {
  font: inherit; color: var(--accent);
  background: none; border: none; padding: 0;
  cursor: pointer; text-decoration: underline; text-underline-offset: 2px;
}

.btn-primary {
  background: var(--accent); color: #fff;
  border-color: color-mix(in srgb, var(--accent) 60%, #000);
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.1); border-color: var(--accent); }

.empty-note {
  margin: 0; padding: 26px; text-align: center;
  font-size: 13px; color: var(--text-faint);
  border: 1px dashed var(--border); border-radius: var(--radius);
  background: var(--bg-sunken);
}

/* ---------- onboarding ---------- */
.onboard {
  position: fixed; inset: 0; z-index: 50;
  display: grid; place-items: center;
  padding: 20px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(6px);
}
.onboard[hidden] { display: none; }
.onboard-card {
  width: min(620px, 100%);
  max-height: 90vh; overflow-y: auto;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 24px 60px rgba(0,0,0,.4);
}
.onboard-step[hidden] { display: none; }
.onboard-eyebrow {
  margin: 0 0 6px; font: 600 11px/1 inherit;
  letter-spacing: .09em; text-transform: uppercase; color: var(--accent);
}
.onboard-card h2 { font-size: 22px; letter-spacing: -0.02em; }
.onboard-lead { margin: 9px 0 20px; font-size: 14px; color: var(--text-dim); }
.onboard-status { margin: 0 0 16px; font-size: 13px; color: var(--text-dim); min-height: 1.2em; }
.onboard-actions { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 20px; }

.choice-grid { display: grid; gap: 10px; }
.choice {
  display: grid; grid-template-columns: 46px 1fr; column-gap: 14px; row-gap: 3px;
  align-items: center; text-align: left;
  padding: 15px; cursor: pointer;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  transition: border-color .12s, background .12s;
}
.choice:hover { border-color: var(--accent); background: var(--accent-dim); }
.choice-icon {
  grid-row: 1 / 3; justify-self: center;
  font-size: 19px; line-height: 1.2;
  color: var(--accent); text-align: center;
}
.choice[data-input="computer"] .choice-icon { font: 600 10px/1.2 var(--mono); letter-spacing: .06em; }
.choice-title { font-size: 14.5px; font-weight: 600; }
.choice-note { font-size: 12.5px; color: var(--text-faint); }

.calibrate {
  display: grid; gap: 9px;
  padding: 16px; border-radius: var(--radius-sm);
  background: var(--bg-sunken); border: 1px solid var(--border);
}
.calibrate-row { display: flex; align-items: center; justify-content: space-between; }
.calibrate-label { font-size: 13px; color: var(--text-dim); }
.calibrate-value {
  font-size: 17px; font-weight: 700; color: var(--accent);
  min-width: 4ch; text-align: right;
}
.calibrate-hint { margin: 4px 0 0; font-size: 12.5px; color: var(--text-faint); }

/* ---------- lesson runner strip ---------- */
.lesson-strip {
  padding: 14px 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--accent-dim), var(--bg-elev));
}
.lesson-strip[hidden] { display: none; }
.strip-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.strip-eyebrow {
  margin: 0 0 3px; font: 600 10.5px/1 inherit;
  letter-spacing: .09em; text-transform: uppercase; color: var(--accent);
}
.strip-head h2 { font-size: 16px; }
.strip-steps { list-style: none; display: flex; gap: 5px; margin: 13px 0 0; padding: 0; flex-wrap: wrap; }
.strip-step {
  height: 6px; flex: 1 1 24px; min-width: 18px; border-radius: 3px;
  background: color-mix(in srgb, var(--text-faint) 30%, transparent);
  transition: background .2s;
}
.strip-step.is-done { background: var(--good); }
.strip-step.is-current { background: var(--accent); animation: pulse 1.6s ease-in-out infinite; }

/* ---------- coach card additions ---------- */
.coach-result {
  margin: 11px 0 0; padding: 10px 13px;
  font-size: 13.5px; border-radius: var(--radius-sm);
  border-left: 3px solid var(--border);
  background: var(--bg-sunken);
}
.coach-result[hidden] { display: none; }
.result-good { border-left-color: var(--good); color: var(--good); background: color-mix(in srgb, var(--good) 10%, transparent); }
.result-ok   { border-left-color: var(--warn); color: var(--warn); background: color-mix(in srgb, var(--warn) 10%, transparent); }
.result-poor { border-left-color: var(--bad);  color: var(--bad);  background: color-mix(in srgb, var(--bad) 10%, transparent); }
.result-note { border-left-color: var(--accent); color: var(--text-dim); }
.coach-actions { display: flex; gap: 8px; margin-top: 13px; flex-wrap: wrap; }
.coach-actions[hidden] { display: none; }

/* ---------- lesson library ---------- */
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 14px;
}
.lesson-card {
  display: flex; flex-direction: column; gap: 9px;
  padding: 17px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .12s;
}
.lesson-card:hover { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.lesson-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.lesson-level {
  font: 600 10.5px/1 inherit; letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 8px; border-radius: 999px;
  background: var(--accent-dim); color: var(--accent);
}
.level-first-steps { background: color-mix(in srgb, var(--good) 16%, transparent); color: var(--good); }
.level-improver    { background: color-mix(in srgb, var(--warn) 16%, transparent); color: var(--warn); }
.level-challenge   { background: color-mix(in srgb, var(--bad) 16%, transparent);  color: var(--bad); }
.lesson-origin { font-size: 11.5px; color: var(--text-faint); }
.lesson-title { font-size: 16px; letter-spacing: -0.01em; }
.lesson-summary { margin: 0; font-size: 13px; color: var(--text-dim); }
.lesson-steps {
  list-style: none; margin: 3px 0; padding: 0;
  display: grid; gap: 4px; font-size: 12px; color: var(--text-faint);
}
.lesson-step { padding-left: 15px; position: relative; }
.lesson-step::before {
  content: ""; position: absolute; left: 0; top: 6px;
  width: 7px; height: 7px; border-radius: 2px;
  background: var(--text-faint);
}
.step-say::before  { background: var(--text-faint); }
.step-show::before { background: var(--accent); }
.step-demo::before { background: var(--warn); }
.step-play::before { background: var(--good); }
.step-more::before { display: none; }
.step-more { font-style: italic; padding-left: 15px; }
.lesson-stats { margin: 0; font-size: 12px; color: var(--text-faint); }
.lesson-actions { display: flex; gap: 8px; margin-top: auto; padding-top: 4px; }

/* ---------- progress ---------- */
.progress-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}
.stat-tile {
  display: grid; gap: 3px;
  padding: 15px 17px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stat-value { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; }
.stat-label { font-size: 12px; color: var(--text-faint); }

.progress-topics { display: grid; gap: 11px; }
.topic-row {
  padding: 15px 17px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.topic-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.topic-name { font-size: 14.5px; font-weight: 600; }
.topic-status {
  font: 600 10.5px/1 inherit; letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 8px; border-radius: 999px;
  background: color-mix(in srgb, var(--text-faint) 18%, transparent); color: var(--text-dim);
}
.status-solid     { background: color-mix(in srgb, var(--good) 16%, transparent); color: var(--good); }
.status-improving { background: var(--accent-dim); color: var(--accent); }
.status-shaky     { background: color-mix(in srgb, var(--warn) 16%, transparent); color: var(--warn); }
.topic-bar {
  height: 6px; margin: 11px 0 8px;
  background: var(--bg-sunken); border-radius: 3px; overflow: hidden;
}
.topic-fill { height: 100%; border-radius: 3px; background: var(--accent); transition: width .3s; }
.topic-fill.result-good { background: var(--good); }
.topic-fill.result-ok   { background: var(--warn); }
.topic-fill.result-poor { background: var(--bad); }
.topic-meta { margin: 0; font-size: 12px; color: var(--text-faint); }
.topic-note { margin: 8px 0 0; font-size: 13px; color: var(--text-dim); font-style: italic; }

/* ---------- about ---------- */
.prose {
  padding: 24px 26px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.prose h2 { font-size: 20px; letter-spacing: -0.015em; }
.prose h3 { font-size: 15.5px; margin-top: 26px; color: var(--accent); }
.prose p { font-size: 14px; color: var(--text-dim); max-width: 68ch; }
.prose-note {
  margin-top: 26px; padding-top: 18px;
  border-top: 1px solid var(--border-soft);
  font-size: 13px; color: var(--text-faint);
}

/* ---------- the library tool tag ---------- */
.tool-tag.library { background: color-mix(in srgb, #7fd4ff 16%, transparent); color: #7fd4ff; }

/* ---------- wide keyboards ---------- */
/* 61, 76 and 88 keys are a lot of white keys. Shrink the furniture rather
   than the keys, so an 88-key layout is still playable at laptop width. */
.keyboard[data-key-count="61"], .keyboard[data-key-count="73"],
.keyboard[data-key-count="76"], .keyboard[data-key-count="88"] { height: 170px; }
.keyboard[data-key-count="76"] .kb-label,
.keyboard[data-key-count="88"] .kb-label { font-size: 8.5px; }
.keyboard[data-key-count="76"] .kb-anchor,
.keyboard[data-key-count="88"] .kb-anchor { display: none; }
.keyboard[data-key-count="76"] .kb-finger,
.keyboard[data-key-count="88"] .kb-finger { font-size: 9.5px; min-width: 15px; height: 15px; line-height: 15px; }
/* Below ~25 keys the labels have room to grow. */
.keyboard[data-key-count="25"] .kb-label { font-size: 12px; }

@media (max-width: 620px) {
  .topbar { padding: 12px 14px; }
  .nav { order: 3; width: 100%; }
  .nav-item { flex: 1; justify-content: center; padding: 8px 6px; }
  .layout, .view-wide, .view-narrow { padding-left: 14px; padding-right: 14px; }
  .keyboard { height: 150px; }
  .onboard-card { padding: 20px; }
}