/* ============================================================
   Arpeggio Trainer — companion page to the Chord Trainer.
   Tokens, header and buttons mirror /scoretrainer/scoretrainer.css.
   ============================================================ */

:root {
  --ink: #0a0908;
  --ivory: #f2e9dc;
  --ivory-dim: #c9bfae;
  --gold: #c8a464;
  --gold-bright: #e4c584;
  --crimson: #a03b3b;
  --sage: #6b8e6b;
  --paper: #1a1614;
  --line: #2a2420;
  --gold-rgb: 200, 164, 100;
  --gold-bright-rgb: 228, 197, 132;

  --font-display: 'Playfair Display', 'Cormorant Garamond', serif;
  --font-body: 'Cormorant Garamond', serif;
  --font-mono: 'JetBrains Mono', monospace;

  --ease-fast: 0.15s ease;
  --ease: 0.2s ease;
  --ease-medium: 0.3s ease;
  --ease-slow: 0.4s ease;

  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  --radius-xl: 6px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

@media (min-width: 900px) {
  html { font-size: 110.5%; zoom: 0.9; }
}

html, body {
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
}

body {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(var(--gold-rgb), 0.08), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(160, 59, 59, 0.05), transparent 50%),
    var(--ink);
  background-attachment: fixed;
}

.app {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem 6rem;
}

@media (max-width: 600px) {
  .app { padding: 1.5rem 0.75rem 4rem; }
}

/* ---------- generic buttons ---------- */

button {
  font-family: var(--font-body);
  font-size: 1rem;
  letter-spacing: 0.04em;
  background: transparent;
  color: var(--ivory);
  border: 1px solid var(--gold);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--ease);
  padding: 0.7rem 1.2rem;
}
button:hover { background: var(--gold); color: var(--ink); }
button:disabled { opacity: 0.3; cursor: not-allowed; }
button:disabled:hover { background: transparent; color: var(--ivory); }

.primary-btn {
  background: var(--gold);
  color: var(--ink);
  font-weight: 500;
}
.primary-btn:hover { background: var(--gold-bright); }
.primary-btn.big {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 0.95rem 2.4rem;
}

.ghost-btn {
  border: 1px solid var(--line);
  color: var(--ivory-dim);
  font-size: 0.92rem;
  padding: 0.55rem 1rem;
}
.ghost-btn:hover { border-color: var(--gold); background: transparent; color: var(--gold); }
.ghost-btn.small { font-size: 0.78rem; padding: 0.35rem 0.7rem; }
.ghost-btn.danger { border-color: rgba(160, 59, 59, 0.45); color: rgba(242, 233, 220, 0.7); }
.ghost-btn.danger:hover { border-color: var(--crimson); color: var(--crimson); background: transparent; }

.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--gold);
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(var(--gold-rgb), 0.4);
  transition: color var(--ease-fast);
}
.link-btn:hover { color: var(--gold-bright); background: transparent; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ivory-dim);
  background: transparent;
}
.icon-btn:hover { border-color: var(--gold); color: var(--gold); background: transparent; }

/* ---------- page footer ---------- */

.page-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ivory-dim);
}
.page-footer a { color: var(--gold); text-decoration: none; }

[hidden] { display: none !important; }

/* ---------- map view ---------- */

.hero { max-width: 760px; margin-bottom: 2.2rem; }
.hero-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}
.hero-title em { color: var(--gold); font-style: italic; }
.hero-sub { font-size: 1.2rem; line-height: 1.5; color: var(--ivory-dim); }


.section-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ivory-dim);
  margin-bottom: 0.9rem;
}

.level-path {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 0.7rem;
  margin-bottom: 1.6rem;
  counter-reset: none;
}
@media (max-width: 600px) { .level-path { grid-template-columns: 1fr; } }

.level-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
  text-align: left;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: rgba(var(--gold-rgb), 0.02);
  color: var(--ivory);
  position: relative;
  overflow: hidden;
}
.level-btn:hover:not(:disabled) { background: rgba(var(--gold-rgb), 0.08); color: var(--ivory); border-color: var(--gold); transform: translateY(-1px); }
.level-btn:disabled { opacity: 0.4; }
.level-btn:disabled:hover { background: rgba(var(--gold-rgb), 0.02); }
.level.is-cleared .level-btn { border-color: rgba(var(--gold-rgb), 0.35); }
.level.is-current .level-btn {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px rgba(var(--gold-rgb), 0.3), 0 0 24px rgba(var(--gold-rgb), 0.15);
}
.level.is-current .level-btn::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 35%, rgba(var(--gold-bright-rgb), 0.12) 50%, transparent 65%);
  background-size: 250% 100%;
  animation: tileShimmer 3.5s ease-in-out infinite;
  pointer-events: none;
}
@keyframes tileShimmer {
  0%        { background-position: 120% 0; }
  60%, 100% { background-position: -40% 0; }
}

.level-num {
  flex-shrink: 0;
  width: 2.4rem; height: 2.4rem;
  display: grid; place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--gold);
}
.level.is-cleared .level-num { background: var(--gold); color: var(--ink); }
.level.is-locked .level-num { border-color: var(--line); font-size: 0.9rem; }
.level-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 0.15rem; }
.level-name { font-size: 1.2rem; font-weight: 500; }
.level-blurb { font-size: 0.95rem; color: var(--ivory-dim); line-height: 1.3; }
.level-pool { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.04em; color: var(--gold); opacity: 0.75; margin-top: 0.2rem; }
.level-tag {
  font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.08em; text-transform: uppercase;
  border: 1px solid rgba(160, 59, 59, 0.6); color: #d88; padding: 0.05rem 0.35rem; border-radius: var(--radius-sm);
  vertical-align: middle;
}
.level-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 0.2rem; flex-shrink: 0; }
.level-dirs { font-size: 1.1rem; color: var(--gold); letter-spacing: 0.1em; }
.level-stars { font-size: 0.95rem; letter-spacing: 0.08em; color: var(--line); }
.level-stars .on { color: var(--gold-bright); text-shadow: 0 0 6px rgba(var(--gold-bright-rgb), 0.5); }
.level-best { font-family: var(--font-mono); font-size: 0.62rem; color: var(--ivory-dim); }

.side-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
  margin-bottom: 2rem;
}
@media (max-width: 600px) { .side-modes { grid-template-columns: 1fr; } }
.mode-card {
  display: flex; align-items: center; gap: 1rem; text-align: left;
  padding: 1rem 1.1rem;
  border: 1px dashed rgba(var(--gold-rgb), 0.5);
  border-radius: var(--radius-xl);
  color: var(--ivory);
}
.mode-card:hover:not(:disabled) { background: rgba(var(--gold-rgb), 0.08); color: var(--ivory); border-style: solid; }
.mode-card-icon { font-size: 1.6rem; color: var(--gold); width: 2.4rem; text-align: center; flex-shrink: 0; }
.mode-card-body { display: flex; flex-direction: column; gap: 0.15rem; }
.mode-card-title { font-size: 1.2rem; font-weight: 500; }
.mode-card-desc { font-size: 0.95rem; color: var(--ivory-dim); }
.weak-count { font-family: var(--font-mono); font-size: 0.75rem; color: #d88; }

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  margin-bottom: 1rem;
  background: color-mix(in srgb, var(--paper) 40%, transparent);
}
.panel-summary {
  cursor: pointer;
  padding: 0.9rem 1.1rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ivory);
  list-style: none;
  display: flex; align-items: baseline; gap: 0.8rem;
}
.panel-summary::-webkit-details-marker { display: none; }
.panel-summary::before { content: '\25B8'; color: var(--gold); transition: transform var(--ease); display: inline-block; }
.panel[open] > .panel-summary::before { transform: rotate(90deg); }
.panel-summary-hint { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.04em; text-transform: none; color: var(--ivory-dim); }
.panel-body { padding: 0 1.1rem 1.1rem; display: flex; flex-direction: column; gap: 1.1rem; }
.panel-foot { display: flex; gap: 0.5rem; justify-content: flex-end; flex-wrap: wrap; }

.setting-row { display: flex; flex-direction: column; gap: 0.5rem; }
.setting-label { font-family: var(--font-display); font-size: 0.64rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ivory-dim); }
.chip-row, .quick-row { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip > span {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.98rem;
  color: var(--ivory-dim);
  cursor: pointer;
  transition: all var(--ease-fast);
  user-select: none;
}
.chip > span:hover { border-color: var(--gold); color: var(--ivory); }
.chip input:checked + span { background: rgba(var(--gold-rgb), 0.16); border-color: var(--gold); color: var(--ivory); }
.chip input:focus-visible + span { outline: 1px solid var(--gold-bright); outline-offset: 2px; }
.chip-sym { font-family: var(--font-display); color: var(--gold); }
.quick-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.28rem 0.6rem;
  border: 1px solid var(--line);
  color: var(--ivory-dim);
}
.quick-btn:hover { background: transparent; border-color: var(--gold); color: var(--gold); }
.quick-label { font-family: var(--font-mono); font-size: 0.66rem; color: var(--ivory-dim); margin-left: 0.4rem; }
.toggles { flex-direction: row; flex-wrap: wrap; gap: 1.2rem; }
.toggle-item { display: inline-flex; align-items: center; }
.toggle { display: inline-flex; align-items: center; gap: 0.45rem; cursor: pointer; font-size: 1.02rem; }
.toggle input { accent-color: var(--gold); width: 1rem; height: 1rem; }

.weak-list { list-style: none; display: flex; flex-direction: column; gap: 0.35rem; }
.weak-list li {
  display: grid;
  grid-template-columns: 4.5rem 1fr auto 5rem;
  gap: 0.8rem;
  align-items: center;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--line);
}
.weak-list li.weak-empty { display: block; color: var(--ivory-dim); font-style: italic; border: none; }
.weak-chord { font-family: var(--font-display); font-size: 1.1rem; color: var(--gold); }
.weak-pattern { color: var(--ivory); }
.weak-stat { font-family: var(--font-mono); font-size: 0.68rem; color: var(--ivory-dim); }
.weak-bar { height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; }
.weak-bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--gold), var(--crimson)); }
@media (max-width: 600px) {
  .weak-list li { grid-template-columns: 3.8rem 1fr; }
  .weak-stat, .weak-bar { grid-column: 2; }
}

/* ---------- play view ---------- */

.play-top {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 1.2rem;
}
.play-title { font-family: var(--font-display); font-size: 0.8rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ivory-dim); }
.play-dots { display: flex; gap: 0.3rem; margin-left: auto; flex-wrap: wrap; }
.play-dots .dot {
  width: 0.7rem; height: 0.7rem; border-radius: 50%;
  border: 1px solid var(--line);
  transition: background var(--ease), transform var(--ease);
}
.play-dots .dot.is-clean { background: var(--gold); border-color: var(--gold); transform: scale(1.15); box-shadow: 0 0 8px rgba(var(--gold-rgb), 0.5); }
.play-dots .dot.is-rough { background: rgba(var(--gold-rgb), 0.3); border-color: rgba(var(--gold-rgb), 0.5); }
.play-dots .dot.is-miss { background: var(--crimson); border-color: var(--crimson); }

.hud { display: flex; justify-content: center; gap: clamp(1rem, 6vw, 4rem); margin-bottom: 1rem; }
.hud-cell { text-align: center; min-width: 5rem; }
.hud-val { font-family: var(--font-display); font-size: 1.7rem; color: var(--ivory); line-height: 1.1; font-variant-numeric: tabular-nums; }
.hud-lbl { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ivory-dim); }
#hudMult { color: var(--gold-bright); letter-spacing: 0.05em; }
.hud-combo.is-hot .hud-val { color: var(--gold-bright); text-shadow: 0 0 14px rgba(var(--gold-bright-rgb), 0.55); }
.hud-combo.is-blazing .hud-val { animation: blaze 0.9s ease-in-out infinite alternate; }
@keyframes blaze {
  from { text-shadow: 0 0 10px rgba(255, 170, 60, 0.6); transform: scale(1); }
  to   { text-shadow: 0 0 22px rgba(255, 120, 40, 0.9); transform: scale(1.08); }
}

.stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.6rem 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(var(--gold-rgb), 0.08), transparent 60%),
    color-mix(in srgb, var(--paper) 50%, transparent);
  margin-bottom: 1rem;
  min-height: 22rem;
}

.instruction {
  display: inline-flex; align-items: center; gap: 0.9rem;
  padding: 0.5rem 1.2rem 0.5rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(var(--gold-rgb), 0.5);
  background: rgba(var(--gold-rgb), 0.06);
}
.instruction.pop { animation: pop 0.35s ease; }
.instr-arrow {
  width: 2.4rem; height: 2.4rem; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 1.5rem; line-height: 1;
  background: var(--gold); color: var(--ink);
}
.instruction[data-dir="down"] .instr-arrow { background: #8fb3c9; }
.instruction[data-dir="down"] { border-color: rgba(143, 179, 201, 0.55); background: rgba(143, 179, 201, 0.07); }
.instruction[data-dir="updown"] .instr-arrow { background: linear-gradient(180deg, var(--gold) 50%, #8fb3c9 50%); }
.instr-text { display: flex; flex-direction: column; line-height: 1.1; }
.instr-dir { font-family: var(--font-display); font-size: 0.72rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--ivory-dim); }
.instr-from { font-size: 1.35rem; }
.instr-from strong { color: var(--gold-bright); font-weight: 600; }
.instruction[data-dir="down"] .instr-from strong { color: #b5d3e4; }

/* Chord stage — same vanishing-point carousel as the chord trainer
   (.chord-stage in /styles.css): previous chord small on the left, current
   one large in the middle, upcoming ones receding to the right. JS sets the
   per-slot custom props, CSS animates between them. */
.chord-stage {
  position: relative;
  width: 100%;
  overflow: hidden;
  --base-size: clamp(4.5rem, 13vw, 10.5rem);
  --step: clamp(6rem, 22vw, 14rem);
}
.stage-track {
  position: relative;
  width: 100%;
  font-size: var(--base-size);
  line-height: 0.9;
  height: 1.3em;
}
.chord-card {
  --xmult: 0;
  --scale: 1;
  --opacity: 1;
  --blur: 0px;
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  white-space: nowrap;
  transform-origin: center center;
  transform:
    translate(-50%, -50%)
    translateX(calc(var(--step) * var(--xmult)))
    scale(var(--scale));
  opacity: var(--opacity);
  filter: blur(var(--blur));
  transition:
    transform 0.55s cubic-bezier(0.22, 1.05, 0.36, 1),
    opacity 0.45s ease,
    filter 0.45s ease;
  pointer-events: none;
  will-change: transform, opacity, filter;
}
.card-chord {
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--ivory);
  transition: color var(--ease-medium), text-shadow var(--ease-slow);
}
.card-chord .accent { color: var(--gold); font-style: italic; font-weight: 400; }
.chord-card:not(.is-current) .card-chord .accent { opacity: 0.85; }
.accidental { margin-right: -0.05em; font-family: 'Helvetica Neue', Arial, sans-serif; }
.accidental-flat { margin-left: -0.22em; }
.accidental-sharp { margin-left: -0.04em; }
.accent .accidental-flat { margin-left: -0.22em; }
.accent .accidental-sharp { margin-left: -0.08em; }
@-moz-document url-prefix() {
  .accidental, .accidental-flat, .accidental-sharp,
  .accent .accidental-flat, .accent .accidental-sharp { margin-left: 0; margin-right: 0; }
}
/* Pattern of the upcoming arpeggios (↑ 3rd); hidden on the current card,
   which has the instruction pill above it. */
.card-degree {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.24em;
  letter-spacing: 0.04em;
  color: var(--gold);
  opacity: 0.8;
  margin-top: 0.35em;
  transition: opacity var(--ease-medium);
}
.chord-card.is-current .card-degree,
.chord-card[data-slot^="-"] .card-degree { opacity: 0; }
.chord-card.is-clean .card-chord { color: var(--gold-bright); text-shadow: 0 0 30px rgba(var(--gold-bright-rgb), 0.55); }

.steps { display: flex; align-items: flex-end; gap: 0.4rem; flex-wrap: wrap; justify-content: center; }
.step { display: inline-flex; align-items: center; gap: 0.4rem; }
.step-dir { color: var(--ivory-dim); font-size: 1rem; opacity: 0.6; }
.step-box {
  display: flex; flex-direction: column; align-items: center; gap: 0.1rem;
  min-width: 3.1rem; padding: 0.45rem 0.6rem 0.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--paper) 75%, transparent);
  transition: all 0.18s ease;
}
.step-note { font-family: var(--font-display); font-size: 1.5rem; line-height: 1.1; }
.step-deg { font-family: var(--font-mono); font-size: 0.58rem; color: var(--ivory-dim); letter-spacing: 0.06em; }
.step.is-done .step-box {
  background: var(--gold); border-color: var(--gold); color: var(--ink);
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(var(--gold-rgb), 0.35);
}
.step.is-done .step-deg { color: rgba(10, 9, 8, 0.7); }
.step.is-done .step-dir { color: var(--gold); opacity: 1; }
.step.shake .step-box { animation: shake 0.35s ease; border-color: var(--crimson); }
.steps.hide-names .step-note { color: var(--ivory-dim); }
.steps.hide-names .step.is-done .step-note { color: var(--ink); }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(3px); }
}
@keyframes pop { 0% { transform: scale(0.9); opacity: 0.4; } 60% { transform: scale(1.04); } 100% { transform: scale(1); opacity: 1; } }

.feedback-line {
  min-height: 1.6rem;
  font-size: 1.15rem;
  font-style: italic;
  color: var(--ivory-dim);
  transition: color var(--ease-fast);
}
.feedback-line.is-good { color: var(--gold-bright); }
.feedback-line.is-bad { color: #e08a8a; }
.feedback-line.is-meh { color: var(--ivory-dim); }

.timer { width: min(420px, 90%); height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; }
.timer-fill { height: 100%; background: var(--gold); transform-origin: left; transition: background var(--ease); }
.timer-fill.is-low { background: var(--crimson); }

.float-layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.float {
  position: absolute; left: 68%; top: 26%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--ivory-dim);
  animation: floatUp 1.1s ease-out forwards;
}
.float.gold { color: var(--gold-bright); text-shadow: 0 0 12px rgba(var(--gold-bright-rgb), 0.6); }
.float.combo { left: 50%; top: 58%; font-size: 2rem; color: #ffb35c; text-shadow: 0 0 18px rgba(255, 140, 50, 0.7); }
@keyframes floatUp {
  0% { opacity: 0; transform: translate(-50%, 10px) scale(0.8); }
  20% { opacity: 1; transform: translate(-50%, 0) scale(1.1); }
  100% { opacity: 0; transform: translate(-50%, -60px) scale(1); }
}

/* ---------- keyboard ---------- */

.kb-frame {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: #050404;
  padding: 0.5rem 0.5rem 0;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.kb { position: relative; height: 150px; min-width: 760px; user-select: none; }
.kb-white, .kb-black { position: absolute; top: 0; border-radius: 0 0 4px 4px; transition: background 0.12s ease, box-shadow 0.12s ease; }
.kb-white {
  height: 100%;
  background: linear-gradient(180deg, #f2e9dc 0%, #e6dcc9 100%);
  border: 1px solid #1a1614;
  box-shadow: inset 0 -5px 0 rgba(0,0,0,0.15);
}
.kb-black {
  height: 62%;
  z-index: 2;
  background: linear-gradient(180deg, #0a0908 0%, #221d1a 100%);
  box-shadow: inset 0 -4px 0 rgba(255,255,255,0.07), 0 2px 4px rgba(0,0,0,0.5);
}
.kb-label {
  position: absolute; bottom: 0.4rem; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: 0.5rem; color: #1a1614; opacity: 0.45;
}
.kb-white.is-tone::after, .kb-black.is-tone::after {
  content: ''; position: absolute; left: 50%; bottom: 1.4rem; transform: translateX(-50%);
  width: 5px; height: 5px; border-radius: 50%; background: rgba(var(--gold-rgb), 0.55);
}
.kb-black.is-tone::after { bottom: 0.6rem; }
.kb-white.is-hint { background: linear-gradient(180deg, #f2e9dc 0%, #e4c584 100%); box-shadow: inset 0 -5px 0 rgba(0,0,0,0.15), 0 0 14px rgba(var(--gold-rgb), 0.55); animation: hintPulse 1.2s ease-in-out infinite; }
.kb-black.is-hint { background: linear-gradient(180deg, #3a2e1a 0%, #c8a464 100%); animation: hintPulse 1.2s ease-in-out infinite; }
@keyframes hintPulse { 50% { filter: brightness(1.12); } }
.kb-white.is-down { background: linear-gradient(180deg, #d9cfbf 0%, #c8bca8 100%); }
.kb-black.is-down { background: #3a332e; }
.kb-white.is-ok, .kb-black.is-ok { animation: keyOk 0.5s ease; }
.kb-white.is-bad, .kb-black.is-bad { animation: keyBad 0.5s ease; }
@keyframes keyOk { 0% { background: #9fd49f; box-shadow: 0 0 18px rgba(139, 196, 139, 0.8); } 100% {} }
@keyframes keyBad { 0% { background: #d26a6a; box-shadow: 0 0 18px rgba(210, 106, 106, 0.8); } 100% {} }

.play-hint { text-align: center; color: var(--ivory-dim); font-size: 0.95rem; font-style: italic; margin-top: 0.8rem; }

/* ---------- modals ---------- */

.modal {
  position: fixed; inset: 0;
  background: rgba(10, 9, 8, 0.86);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 1rem;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from { opacity: 0; } }
.modal-box {
  background: var(--paper);
  border: 1px solid var(--gold);
  border-radius: var(--radius-lg);
  width: 100%;
  max-height: 88vh;
  display: flex; flex-direction: column;
  overflow: hidden;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.2rem 0.8rem; border-bottom: 1px solid var(--line); }
.modal-title { font-weight: 500; font-size: 1.3rem; }
.modal-close { border: none; font-size: 1.6rem; line-height: 1; padding: 0 0.2rem; color: var(--ivory-dim); }
.modal-close:hover { background: transparent; color: var(--gold-bright); }
.modal-body { overflow-y: auto; flex: 1; }

.result-box { max-width: 520px; padding: 2rem 1.6rem 1.4rem; text-align: center; align-items: center; gap: 0.6rem; }
.result-eyebrow { font-family: var(--font-display); font-size: 0.68rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--ivory-dim); }
.result-title { font-family: var(--font-display); font-size: 2.2rem; }
.result-stars { display: flex; gap: 0.6rem; font-size: 3rem; margin: 0.2rem 0 0.4rem; }
.result-stars .star { color: var(--line); transform: scale(0.6); opacity: 0.5; animation: starIn 0.5s cubic-bezier(.2,.8,.3,1.5) var(--d) forwards; }
.result-stars .star.on { color: var(--gold-bright); }
@keyframes starIn { to { transform: scale(1); opacity: 1; text-shadow: 0 0 20px rgba(var(--gold-bright-rgb), 0.4); } }
.result-stars .star:not(.on) { animation-name: starInOff; }
@keyframes starInOff { to { transform: scale(0.85); opacity: 0.6; } }
.result-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.2rem; margin: 0.4rem 0; }
.result-stats div { display: flex; flex-direction: column; min-width: 4.5rem; }
.result-stats b { font-family: var(--font-display); font-weight: 500; font-size: 1.4rem; }
.result-stats span { font-family: var(--font-display); font-size: 0.56rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ivory-dim); }
.result-note { color: var(--ivory-dim); font-style: italic; font-size: 1.05rem; min-height: 1.4rem; }
.result-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; justify-content: center; margin-top: 0.8rem; }

/* ---------- achievements (mirrors /styles.css) ---------- */

.ach-modal-box { max-width: 720px; }
.ach-count { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ivory-dim); margin-left: 0.5rem; font-weight: 400; }
.ach-section + .ach-section { border-top: 1px solid var(--line); margin-top: 0.4rem; }
.ach-section-header { display: flex; justify-content: space-between; align-items: baseline; padding: 0.9rem 1.2rem 0.15rem; }
.ach-section-label { font-family: var(--font-display); font-size: 0.8rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ivory-dim); }
.ach-section-secret .ach-section-label { color: var(--gold); }
.ach-section-ultra .ach-section-label {
  background: linear-gradient(90deg, var(--gold-bright), #fff, var(--gold-bright));
  background-size: 200% auto;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  animation: shimmer 4s linear infinite;
}
@keyframes shimmer { 0% { background-position: 0% center; } 100% { background-position: 200% center; } }
.ach-section-count { font-family: var(--font-mono); font-size: 0.7rem; color: var(--ivory-dim); }
.ach-section-blurb { padding: 0 1.2rem 0.4rem; font-style: italic; font-size: 0.9rem; color: var(--ivory-dim); opacity: 0.75; }
.ach-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.6rem; padding: 0.5rem 1.2rem 1rem; }
.ach-tile {
  position: relative; overflow: hidden;
  display: flex; gap: 0.7rem; align-items: center;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(var(--gold-rgb), 0.02);
}
.ach-tile-locked { opacity: 0.45; }
.ach-tile-locked .ach-tile-icon { filter: grayscale(1); }
.ach-tile-secret { opacity: 0.78; border-color: rgba(var(--gold-rgb), 0.25); }
.ach-tile-secret .ach-tile-icon { font-family: var(--font-mono); color: var(--gold); font-weight: 600; filter: none; animation: secretPulse 3.2s ease-in-out infinite; }
@keyframes secretPulse { 50% { opacity: 0.6; } }
.ach-tile-secret .ach-tile-name { font-style: italic; color: var(--ivory-dim); letter-spacing: 0.15em; }
.ach-tile-secret .ach-tile-desc, .ach-tile-ultra .ach-tile-desc { font-style: italic; color: var(--gold); opacity: 0.85; }
.ach-tile-ultra {
  opacity: 0.92;
  border-color: rgba(var(--gold-bright-rgb), 0.45);
  background: linear-gradient(135deg, rgba(var(--gold-bright-rgb), 0.10), rgba(160, 59, 59, 0.06) 50%, rgba(107, 142, 107, 0.08)), rgba(10, 9, 8, 0.7);
}
.ach-tile-ultra .ach-tile-icon { filter: none; }
.ach-tile-tag {
  font-family: var(--font-display); font-size: 0.55rem; letter-spacing: 0.22em; text-transform: uppercase;
  background: linear-gradient(90deg, var(--gold-bright), #fff, var(--gold-bright)); background-size: 200% auto;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  animation: shimmer 3.5s linear infinite;
}
.ach-tile-shimmer {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, transparent 30%, rgba(var(--gold-bright-rgb), 0.10) 48%, rgba(255,255,255,0.18) 50%, rgba(var(--gold-bright-rgb), 0.10) 52%, transparent 70%);
  background-size: 250% 100%;
  animation: tileShimmer 3.2s ease-in-out infinite;
  mix-blend-mode: screen;
}
.ach-tile-unlocked { border-color: rgba(var(--gold-rgb), 0.45); background: rgba(var(--gold-rgb), 0.07); }
.ach-tile-icon { font-size: 1.8rem; line-height: 1; flex-shrink: 0; width: 2rem; text-align: center; }
.ach-tile-body { flex: 1; min-width: 0; }
.ach-tile-name { font-size: 1.12rem; font-weight: 500; line-height: 1.2; }
.ach-tile-desc { font-size: 0.85rem; color: var(--ivory-dim); margin-top: 0.15rem; line-height: 1.3; }
.ach-tile-progress { margin-top: 0.4rem; display: flex; align-items: center; gap: 0.5rem; }
.ach-tile-bar { flex: 1; height: 3px; background: var(--line); border-radius: 2px; overflow: hidden; }
.ach-tile-fill { height: 100%; background: var(--gold); }
.ach-tile-progress-text { font-family: var(--font-mono); font-size: 0.66rem; color: var(--ivory-dim); }
.ach-modal-footer { padding: 0.7rem 1.2rem; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; }
.ach-reset-btn { font-family: var(--font-mono); font-size: 0.68rem; padding: 0.32rem 0.8rem; border: 1px solid var(--line); color: var(--ivory-dim); }
.ach-reset-btn:hover { background: transparent; color: var(--crimson); border-color: var(--crimson); }
.ach-reset-btn.armed { background: var(--crimson); color: var(--ink); border-color: var(--crimson); }

.ach-toast {
  position: fixed; top: 1.2rem; right: 1.2rem; z-index: 1100;
  display: flex; align-items: center; gap: 0.8rem;
  padding: 0.8rem 1.1rem;
  max-width: 340px;
  background: var(--ink);
  border: 1px solid rgba(var(--gold-rgb), 0.5);
  border-radius: var(--radius-xl);
  box-shadow: 0 6px 28px rgba(0,0,0,0.6), 0 0 18px rgba(var(--gold-rgb), 0.15);
  opacity: 0; transform: translateY(-12px);
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
}
.ach-toast.visible { opacity: 1; transform: translateY(0); }
.ach-toast.is-rare { border-color: var(--gold-bright); box-shadow: 0 6px 28px rgba(0,0,0,0.6), 0 0 28px rgba(var(--gold-bright-rgb), 0.35); }
.ach-toast-icon { font-size: 2rem; line-height: 1; }
.ach-toast-tier { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold); }
.ach-toast-name { font-size: 1.15rem; font-style: italic; line-height: 1.2; }
.ach-toast-desc { font-size: 0.85rem; color: var(--ivory-dim); line-height: 1.25; }

@media (max-width: 600px) {
  .stage { min-height: 0; padding: 1.2rem 0.6rem 1rem; }
  .chord-stage {
    --base-size: clamp(3.4rem, 18vw, 6rem);
    --step: clamp(3.5rem, 26vw, 7rem);
  }
  .step-box { min-width: 2.5rem; padding: 0.35rem 0.4rem 0.25rem; }
  .step-note { font-size: 1.25rem; }
  .hud-val { font-size: 1.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

/* Chord qualities: same checkbox grid as the Chords trainer's options. */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.05rem 0.8rem;
  margin-bottom: 0.4rem;
}
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  padding: 0.3rem 0;
  font-size: 1.05rem;
}
.checkbox-item input {
  appearance: none;
  width: 16px;
  height: 16px;
  margin: 0;
  border: 1px solid var(--gold);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
}
.checkbox-item input:checked { background: var(--gold); }
.checkbox-item input:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid var(--ink);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}