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

:root {
  --bg: #0a0a0f;
  --panel: #12121a;
  --border: #1e1e2e;
  --text: #e0e0e0;
  --text-dim: #666680;
  --accent: #7c5cfc;
  --accent-glow: rgba(124, 92, 252, 0.4);
  --hit: #5cfc7c;
  --miss: #fc5c5c;
  --gold: #fcd05c;
  --perfect: #5cfc7c;
  --good: #5cc8fc;
  --ok: #fcd05c;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  height: 100vh;
  user-select: none;
  overflow: hidden;
}

/* ===== Desktop two-column layout ===== */
#app {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 16px;
  padding: 16px;
  height: 100vh;
  overflow: hidden;
  transition: background 0.15s;
}

#app.pulse {
  background: none;
}

#play-column {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0; /* allow shrinking in grid */
}

#side-column {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

/* Tab bar */
#side-tabs {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
  margin-bottom: 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.side-tab {
  flex: 1;
  padding: 8px 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  background: transparent;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.side-tab:hover {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

.side-tab.active {
  color: var(--accent);
  background: var(--panel);
  border-color: var(--border);
}

/* Tab content area */
#tab-content {
  flex: 1;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 8px 8px;
  padding: 16px;
}

#tab-content::-webkit-scrollbar { width: 6px; }
#tab-content::-webkit-scrollbar-track { background: transparent; }
#tab-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
#tab-content::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* Tab panes */
.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Header */
#header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  flex-shrink: 0;
}

#header h1 {
  font-size: 18px;
  letter-spacing: 6px;
  color: var(--accent);
  font-weight: 300;
}

#currency-display {
  font-size: 22px;
  font-weight: 600;
}

#currency {
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

/* Panels (used for audio-status and any standalone panels) */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  width: 100%;
}

.panel h2 {
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
}

/* Audio Status */
#audio-status {
  flex-shrink: 0;
}

#status-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

#vu-meter {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

#vu-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--hit));
  border-radius: 4px;
  transition: width 0.05s;
}

.hint {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
}

/* Buttons */
.btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.1s, box-shadow 0.15s, opacity 0.15s;
  white-space: nowrap;
}

.btn:hover {
  opacity: 0.9;
  box-shadow: 0 0 16px var(--accent-glow);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px) scale(0.97);
  box-shadow: none;
}

.btn:disabled { opacity: 0.3; cursor: default; transform: none; box-shadow: none; }

.btn-small {
  padding: 6px 14px;
  font-size: 13px;
}

.btn-secondary {
  background: var(--border);
  color: var(--text-dim);
}

.btn-secondary.sync-hint-pulse {
  animation: sync-hint-glow 1.2s ease-in-out;
}

@keyframes sync-hint-glow {
  0%   { box-shadow: none; color: var(--text-dim); }
  40%  { box-shadow: 0 0 14px 4px rgba(124, 92, 252, 0.7), 0 0 28px 8px rgba(124, 92, 252, 0.35); color: #fff; }
  100% { box-shadow: none; color: var(--text-dim); }
}

.btn-secondary:hover {
  background: #2a2a3a;
  color: var(--text);
  box-shadow: none;
}

/* Note Track - fills remaining play-column height */
#note-track {
  position: relative;
  width: 100%;
  flex: 1;
  min-height: 300px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

#lanes-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 56px; /* leave room for hit zone + labels */
  display: flex;
  margin: 0 auto;
  max-width: 100%;
  transition: max-width 0.3s ease;
}

#lane-labels {
  display: flex;
  position: absolute;
  top: 6px;
  left: 0;
  right: 0;
  height: 46px;
  margin: 0 auto;
  max-width: 100%;
  transition: max-width 0.3s ease;
}

/* Phase-based width: keep lanes closer together until all 8 are unlocked */
#lanes-container[data-count="1"], #lane-labels[data-count="1"] { max-width: 14%; left: 0; right: 0; }
#lanes-container[data-count="2"], #lane-labels[data-count="2"] { max-width: 22%; left: 0; right: 0; }
#lanes-container[data-count="3"], #lane-labels[data-count="3"] { max-width: 29%; left: 0; right: 0; }
#lanes-container[data-count="4"], #lane-labels[data-count="4"] { max-width: 35%; left: 0; right: 0; }
#lanes-container[data-count="5"], #lane-labels[data-count="5"] { max-width: 43%; left: 0; right: 0; }
#lanes-container[data-count="6"], #lane-labels[data-count="6"] { max-width: 51%; left: 0; right: 0; }
#lanes-container[data-count="7"], #lane-labels[data-count="7"] { max-width: 62%; left: 0; right: 0; }
#lanes-container[data-count="8"], #lane-labels[data-count="8"] { max-width: 100%; left: 0; right: 0; }
/* 9 lanes = all 8 arrows plus the tier-5 center key */
#lanes-container[data-count="9"], #lane-labels[data-count="9"] { max-width: 100%; left: 0; right: 0; }

.lane {
  flex: 1;
  position: relative;
  border-right: 1px solid rgba(30, 30, 46, 0.6);
}

.lane:last-child {
  border-right: none;
}

/* Auto-hit lanes (diagonals): the game plays these, so they read as background/ambient.
   Dimmed and faintly tinted to signal "not yours to hit." */
.lane.auto-lane {
  background: rgba(124, 92, 252, 0.04);
}

.lane-label.auto-lane {
  opacity: 0.4;
}

.lane-flash {
  background: none !important;
}

.lane-flash::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  background: rgba(124, 92, 252, 0.25);
  pointer-events: none;
  transition: none;
}

.lane:not(.lane-flash) {
  transition: background 0.15s;
}

/* Hit zone */
#hit-zone {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
}

#hit-zone-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow), 0 0 24px var(--accent-glow);
}

.lane-label {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  transition: all 0.12s;
}

.lane-label.label-hit {
  color: white;
  background: var(--key-color, var(--accent));
  border-radius: 6px;
  text-shadow: 0 0 16px var(--key-glow, var(--accent-glow));
  transform: scale(1.2);
  box-shadow: 0 0 20px var(--key-glow, var(--accent-glow));
}

/* Notes — the SVG element is the note itself */
.note {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 56px;
  display: block;
  overflow: visible;
  /* Fully opaque from spawn. The transition is retained only for the hit/miss states
     below, which fade the note out deliberately. */
  opacity: 1;
  transition: opacity 0.1s;
  pointer-events: none;
  z-index: 2;
}

/* Chord notes: paired with another simultaneous note. Bigger glow, slightly larger. */
/* Chord notes are emphasised with glow ONLY. Do not scale them: a scaled arrow's tip and
   tail extend past its unscaled partner, so the pair reads as misaligned even though both
   share an identical top. Geometry must match normal notes exactly. */
.note.chord-note {
  filter: brightness(1.25);
}

/* Per-key color variables (used for label-hit flash) */
.note-key-a, .lane-label-key-a { --key-color: #ff4455; --key-glow: rgba(255,68,85,0.6); }
.note-key-w, .lane-label-key-w { --key-color: #44dd77; --key-glow: rgba(68,221,119,0.6); }
.note-key-s, .lane-label-key-s { --key-color: #4499ff; --key-glow: rgba(68,153,255,0.6); }
.note-key-d, .lane-label-key-d { --key-color: #ffdd33; --key-glow: rgba(255,221,51,0.6); }
.note-key-q, .lane-label-key-q { --key-color: #cc44ff; --key-glow: rgba(204,68,255,0.6); }
.note-key-e, .lane-label-key-e { --key-color: #ff8833; --key-glow: rgba(255,136,51,0.6); }
.note-key-z, .lane-label-key-z { --key-color: #ff44cc; --key-glow: rgba(255,68,204,0.6); }
.note-key-x, .lane-label-key-x { --key-color: #aaddff; --key-glow: rgba(170,221,255,0.6); }
.note-key-c, .lane-label-key-c { --key-color: #44ffcc; --key-glow: rgba(68,255,204,0.6); }

/* Lane label arrows (DDR target receptors) */
.label-arrow {
  display: block;
  width: 44px;
  height: 44px;
  overflow: visible;
}

/* Note hit/miss states */
.note-hit {
  filter: drop-shadow(0 0 14px rgba(92,252,124,1)) !important;
  transform: translateX(-50%) scale(1.3);
  opacity: 0 !important;
  transition: transform 0.15s, opacity 0.15s;
}

.note-miss {
  opacity: 0.25 !important;
  transition: opacity 0.2s;
}

/* Feedback */
#feedback {
  text-align: center;
  width: 100%;
  flex-shrink: 0;
}

#combo-display {
  font-size: 14px;
  color: var(--text-dim);
}

#combo-count {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

#combo-mult {
  color: var(--gold);
  font-weight: 600;
}

#tap-feedback {
  height: 24px;
  font-size: 16px;
  font-weight: 700;
  margin: 4px 0;
}

.feedback-perfect { color: var(--perfect); }
.feedback-good { color: var(--good); }
.feedback-ok { color: var(--ok); }
.feedback-miss { color: var(--miss); }

#accuracy-display {
  display: flex;
  gap: 16px;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}

.acc-perfect { color: var(--perfect); }
.acc-good { color: var(--good); }
.acc-ok { color: var(--ok); }
.acc-miss { color: var(--miss); }

/* Upgrades */
#key-upgrades {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.buy-mode-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 6px;
}

.buy-mode-btn {
  flex: 1;
  padding: 6px 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text-dim);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.buy-mode-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.buy-mode-btn.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.key-upgrade {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.key-upgrade:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: translateX(2px);
}

.key-upgrade:active {
  transform: scale(0.97);
}

.key-upgrade-label {
  font-weight: 700;
  font-size: 18px;
  color: var(--accent);
  width: 28px;
  text-align: center;
  text-transform: uppercase;
}

.key-upgrade-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.key-upgrade-level {
  font-size: 13px;
  color: var(--text);
  font-weight: 600;
}

.key-upgrade-cost {
  font-size: 11px;
  color: var(--text-dim);
}

.key-upgrade-action {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--border);
}

.key-upgrade.affordable .key-upgrade-action {
  color: var(--bg);
  background: var(--accent);
}

.key-upgrade.affordable {
  cursor: pointer;
}

.key-upgrade:not(.affordable) {
  opacity: 0.6;
  cursor: default;
}

.key-upgrade:not(.affordable):hover {
  border-color: var(--border);
  box-shadow: none;
  transform: none;
}

#tier-unlock {
  margin-top: 12px;
}

/* Stats */
#stats-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 13px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
}

.stat-label {
  color: var(--text-dim);
}

.stat-value {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Dancers panel */
#dancer-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

#dancer-accuracy-label {
  font-size: 12px;
  min-height: 18px;
  margin-bottom: 4px;
}

#dancer-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: flex-end;
  min-height: 36px;
  margin-bottom: 8px;
}

.dancer-figure {
  display: inline-flex;
  color: var(--accent);
  filter: drop-shadow(0 0 4px var(--accent-glow));
  animation: dance 0.55s ease-in-out infinite alternate;
  transform-origin: center bottom;
}

.dancer-more {
  font-size: 12px;
  color: var(--text-dim);
  align-self: center;
  padding-left: 2px;
}

@keyframes dance {
  0%   { transform: rotate(-14deg) translateY(0); }
  100% { transform: rotate(14deg) translateY(-4px); }
}

/* --- Prestige Pane --- */
.prestige-pane {
  border-radius: 4px;
  padding: 4px;
  background: linear-gradient(135deg, rgba(212,160,23,0.05) 0%, transparent 100%);
}

.prestige-btn {
  width: 100%;
  margin-top: 10px;
  padding: 10px 16px;
  background: linear-gradient(135deg, #d4a017, #b8860b);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: filter 0.15s, box-shadow 0.15s;
}

.prestige-btn:hover:not(:disabled) {
  filter: brightness(1.2);
  box-shadow: 0 0 12px rgba(212,160,23,0.5);
}

.prestige-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: #555;
}

/* --- Star Shop --- */
.star-shop-heading {
  margin: 14px 0 6px;
  font-size: 0.85rem;
  color: #f0c040;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.star-shop-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  margin-bottom: 4px;
  border-radius: 6px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  font-size: 0.82rem;
  transition: background 0.15s, border-color 0.15s;
}

.star-shop-item.affordable {
  border-color: rgba(240,192,64,0.3);
  cursor: pointer;
}

.star-shop-item.affordable:hover {
  background: rgba(240,192,64,0.08);
}

.star-shop-item.purchased {
  opacity: 0.55;
  border-color: rgba(68,221,119,0.3);
}

.star-shop-cost {
  min-width: 36px;
  text-align: right;
  color: #f0c040;
  font-weight: 700;
  font-size: 0.8rem;
  white-space: nowrap;
}

.star-shop-info {
  flex: 1;
  min-width: 0;
}

.star-shop-name {
  font-weight: 600;
  color: #eee;
}

.star-shop-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.star-shop-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.star-shop-badge.owned {
  background: rgba(68,221,119,0.2);
  color: #44dd77;
}

.star-shop-badge.buy {
  background: rgba(240,192,64,0.2);
  color: #f0c040;
}

.star-shop-badge.locked {
  background: rgba(255,255,255,0.06);
  color: #666;
}

/* --- BPM Selector --- */
#bpm-selector {
  display: flex;
  gap: 4px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.bpm-btn {
  padding: 3px 8px;
  font-size: 0.7rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}

.bpm-btn:hover {
  background: rgba(124,92,252,0.15);
  border-color: var(--accent);
}

.bpm-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.bpm-detected {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 14px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid rgba(124,92,252,0.5);
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(124,92,252,0.18), rgba(124,92,252,0.06));
  color: #fff;
  box-shadow: 0 0 12px rgba(124,92,252,0.25);
}

.bpm-detected-label {
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  position: relative;
  padding-left: 14px;
}

.bpm-detected-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(-50%);
  animation: bpm-dot-pulse 1s ease-in-out infinite;
  box-shadow: 0 0 8px var(--accent);
}

#detected-bpm-value {
  font-variant-numeric: tabular-nums;
}

@keyframes bpm-dot-pulse {
  0%, 100% { opacity: 1; transform: translateY(-50%) scale(1); }
  50% { opacity: 0.5; transform: translateY(-50%) scale(0.7); }
}

.bpm-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.bpm-mult {
  font-size: 0.6rem;
  color: #f0c040;
  margin-left: 2px;
}

/* --- Hyperspeed (note scroll speed) --- */
#hyperspeed-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  flex-wrap: wrap;
}

#hyperspeed-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

#hyperspeed-selector {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

/* Same chip treatment as the BPM buttons so the two rows read as one control group. */
.hyperspeed-btn {
  padding: 3px 8px;
  font-size: 0.7rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}

.hyperspeed-btn:hover {
  background: rgba(124,92,252,0.15);
  border-color: var(--accent);
}

.hyperspeed-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* --- Save Controls --- */
#save-controls {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

/* --- Achievements Pane --- */
#achievement-header .hint {
  font-size: 0.75rem;
  font-weight: 400;
}

#achievement-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 300px;
  overflow-y: auto;
}

.achievement-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  font-size: 0.82rem;
  transition: background 0.2s;
}

.achievement-item.unlocked {
  background: rgba(68,221,119,0.08);
  border-color: rgba(68,221,119,0.2);
}

.achievement-item.locked {
  opacity: 0.45;
}

.achievement-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.achievement-info {
  flex: 1;
  min-width: 0;
}

.achievement-name {
  font-weight: 600;
  color: var(--text);
}

.achievement-desc {
  color: var(--text-dim);
  font-size: 0.75rem;
}

/* Achievement toast */
/* One-time note about the optional auto lanes. Sits high on the track so it is clear of
   the hit line and the incoming notes, and fades on its own. */
.auto-lane-hint {
  position: absolute;
  top: 12%;
  left: 50%;
  transform: translateX(-50%);
  max-width: 80%;
  text-align: center;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(18, 18, 26, 0.88);
  border: 1px solid rgba(124, 92, 252, 0.35);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  pointer-events: none;
  z-index: 10;
  animation: auto-lane-hint-fade 9s ease-out forwards;
}

@keyframes auto-lane-hint-fade {
  0%   { opacity: 0; }
  4%   { opacity: 1; }
  85%  { opacity: 1; }
  100% { opacity: 0; }
}

/* Keyboard-purchase confirmation. Deliberately unlike .achievement-toast: bottom-left,
   small, no colour fill, quick fade. Purchases happen constantly during play, so this
   must not read as an achievement unlock or pull the eye off the note track. */
.purchase-toast {
  position: fixed;
  bottom: 16px;
  left: 16px;
  background: rgba(18, 18, 26, 0.92);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 5px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  z-index: 900;
  pointer-events: none;
  opacity: 0;
  animation: purchase-toast-fade 1.1s ease-out forwards;
}

@keyframes purchase-toast-fade {
  0%   { opacity: 0; }
  12%  { opacity: 1; }
  70%  { opacity: 1; }
  100% { opacity: 0; }
}

.achievement-toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, rgba(68,221,119,0.95), rgba(40,160,80,0.95));
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  z-index: 1000;
  pointer-events: none;
  animation: toast-in 0.3s ease-out, toast-out 0.4s ease-in 2.2s forwards;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toast-out {
  from { opacity: 1; }
  to { opacity: 0; transform: translateX(-50%) translateY(-20px); }
}

/* ===== Tutorial ===== */
#tutorial-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 3000;
}

.tutorial-tooltip {
  position: fixed;
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 20px 24px;
  max-width: 320px;
  z-index: 3001;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--accent-glow);
  animation: tooltip-in 0.25s ease-out;
}

@keyframes tooltip-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tutorial-counter {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.tutorial-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
}

.tutorial-text {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 16px;
}

.tutorial-buttons {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.tutorial-skip {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 6px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: color 0.15s, border-color 0.15s;
}

.tutorial-skip:hover {
  color: var(--text);
  border-color: var(--text-dim);
}

.tutorial-next {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 6px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: filter 0.15s;
}

.tutorial-next:hover {
  filter: brightness(1.15);
}

/* Audio Setup Guide */
.btn-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-dim);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}

.btn-icon:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#audio-guide {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

#audio-guide-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.guide-step {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
  opacity: 0.45;
  transition: opacity 0.25s, border-color 0.25s, background 0.25s;
}

.guide-step.active {
  opacity: 1;
  border-color: var(--accent);
  background: rgba(124, 92, 252, 0.08);
}

.guide-step.done {
  opacity: 0.7;
  border-color: var(--hit);
}

.guide-step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-dim);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.guide-step.active .guide-step-num {
  background: var(--accent);
  color: #fff;
}

.guide-step.done .guide-step-num {
  background: var(--hit);
  color: #111;
}

.guide-step.done .guide-step-num::after {
  content: '\2713';
}

.guide-step.done .guide-step-num {
  font-size: 0;
}

.guide-step.done .guide-step-num::after {
  font-size: 0.75rem;
}

.guide-step-content strong {
  font-size: 0.85rem;
  color: var(--text);
}

.guide-step-content p {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 2px;
  line-height: 1.35;
}

#audio-guide-status {
  font-size: 0.82rem;
  padding: 6px 10px;
  border-radius: 6px;
  margin-bottom: 8px;
  display: none;
}

#audio-guide-status.status-ok {
  display: block;
  background: rgba(92, 252, 124, 0.1);
  color: var(--hit);
  border: 1px solid rgba(92, 252, 124, 0.25);
}

#audio-guide-status.status-warn {
  display: block;
  background: rgba(252, 208, 92, 0.1);
  color: var(--ok);
  border: 1px solid rgba(252, 208, 92, 0.25);
}

#audio-guide-status.status-error {
  display: block;
  background: rgba(252, 92, 92, 0.1);
  color: var(--miss);
  border: 1px solid rgba(252, 92, 92, 0.25);
}

#audio-guide-close {
  margin-top: 4px;
}

/* Combo breakdown */
#combo-total {
  line-height: 1;
}

.combo-sublabel {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--hit);
  opacity: 0.7;
  margin-top: 3px;
  text-align: center;
}

#combo-split {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 6px;
}

.combo-track {
  display: flex;
  align-items: center;
  gap: 5px;
}

.combo-track-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  opacity: 0.5;
}

#combo-auto .combo-track-label {
  color: var(--ok);
}

#combo-auto .combo-track-count {
  color: var(--ok);
  font-weight: 700;
  font-size: 0.95rem;
}

#combo-auto.combo-leading .combo-track-count {
  text-shadow: 0 0 8px rgba(252, 208, 92, 0.5);
}

/* Lane label text (arrow/numpad mode) */
.lane-label-text {
  font-size: 1.4rem;
  font-weight: 700;
  opacity: 0.5;
}