#piano-panel-body .mirror-screen { z-index: 2000; }
#piano-panel-body .celebrate { z-index: 2001; }
#piano-panel-body .phone-rotate-exit { z-index: 1999; }

:root {
  --bg: #0a0a0a;
  --bg-dot: #1a1a1a;
  --surface: #111111;
  --surface2: #1c1c1c;
  --line: #2e2e2e;
  --line-soft: #222222;
  --text: #f4f4f4;
  --muted: #8a8a8a;
  --dim: #5c5c5c;
  --invert: #ffffff;
  --invert-text: #0a0a0a;
  --radius: 4px;
  --font: 'DM Sans', system-ui, sans-serif;
  --mono: 'DM Mono', ui-monospace, monospace;
}

#piano-panel-body .mirror-screen { z-index: 2000; }
#piano-panel-body .celebrate { z-index: 2001; }
#piano-panel-body .phone-rotate-exit { z-index: 1999; }

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg);
  background-image: radial-gradient(circle, var(--bg-dot) 1px, transparent 1px);
  background-size: 14px 14px;
}

button, input, select {
  font: inherit;
  color: inherit;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  padding: 16px 18px 8px;
  text-align: center;
}

.header-compact {
  padding: 12px 16px 6px;
}

.header h1 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--text);
}

.header p {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 4px;
}

/* ── Score dock ── */
.score-dock {
  position: sticky;
  top: 0;
  z-index: 40;
  margin: 0 12px 10px;
  padding: 12px 14px 10px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.score-dock-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.dock-song {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.dock-emoji {
  font-size: 1rem;
  flex-shrink: 0;
  opacity: 0.7;
}

.dock-title {
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.01em;
}

.dock-meta {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-top: 2px;
}

.dock-view-btns {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.dock-icon-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface2);
  color: var(--muted);
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.dock-icon-btn:active { transform: scale(0.96); }

.dock-icon-btn.active {
  background: var(--invert);
  color: var(--invert-text);
  border-color: var(--invert);
}

.score-dock-flip {
  transition: transform 0.3s ease;
  transform-origin: center center;
}

.score-dock-flip.is-flip-h { transform: scaleX(-1); }
.score-dock-flip.is-rotate { transform: rotate(90deg); }
.score-dock-flip.is-flip-h.is-rotate { transform: scaleX(-1) rotate(90deg); }

.dock-transport-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 10px 0 8px;
}

.dock-tbtn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
}

.dock-tbtn:active { background: var(--surface2); }

.dock-speed {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.dock-speed-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  min-width: 40px;
}

.speed-presets { display: flex; gap: 3px; }

.speed-chip {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 8px;
  font-family: var(--mono);
  font-size: 0.58rem;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.speed-chip.active {
  background: var(--invert);
  color: var(--invert-text);
  border-color: var(--invert);
}

.dock-tempo-slider {
  flex: 1;
  min-width: 80px;
  accent-color: var(--invert);
}

.dock-btn {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--text);
}

.dock-btn-play {
  background: var(--invert);
  color: var(--invert-text);
  border-color: var(--invert);
}

.dock-btn-mirror {
  background: var(--surface2);
  color: var(--text);
}

.notation-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  margin-bottom: 8px;
  scroll-behavior: auto;
  scrollbar-width: thin;
  position: relative;
  background: #fafafa;
}

.notation-scroll.has-narrow-score {
  display: flex;
  justify-content: center;
}

.notation-viewport {
  position: relative;
  display: inline-block;
  min-width: 100%;
}

.notation-letters {
  position: relative;
  height: 26px;
  margin-bottom: 2px;
  pointer-events: none;
}

.note-letter {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: 2px;
  background: #111;
  color: #fff;
  white-space: nowrap;
  transition: transform 0.12s, opacity 0.12s;
  border: 1px solid #333;
}

.note-letter.active {
  transform: translateX(-50%) scale(1.15);
  background: #000;
  border-color: #000;
  z-index: 3;
}

.note-letter.upcoming { opacity: 0.55; }

.notation-playhead {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  margin-left: -1px;
  background: #000;
  pointer-events: none;
  z-index: 5;
  opacity: 0;
}

.notation-playhead.visible { opacity: 1; }

.notation-scroll::-webkit-scrollbar { height: 3px; }
.notation-scroll::-webkit-scrollbar-thumb {
  background: #ccc;
}

#notation-container {
  overflow: visible;
  background: #fafafa;
  padding: 4px 2px 6px;
  min-height: 96px;
  min-width: min(100%, 320px);
}

#notation-container svg { display: block; margin: 0 auto; }

.notation-placeholder {
  color: #666;
  padding: 24px 16px;
  text-align: center;
  font-size: 0.82rem;
  line-height: 1.5;
}

.piano-roll-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  margin-bottom: 8px;
  background: #0a0a0a;
  scrollbar-width: thin;
}

.piano-roll-scroll.has-narrow-score {
  display: flex;
  justify-content: center;
}

#piano-roll-canvas {
  display: block;
  height: 88px;
  touch-action: none;
}

.keymap-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  background: #050505;
  border: 1px solid var(--line);
  margin-bottom: 8px;
}

#keymap-canvas {
  display: block;
  width: 100%;
  height: 64px;
  touch-action: none;
}

.legend-row {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.legend-chip {
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 500;
  padding: 2px 7px;
  border-radius: 2px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.legend-chip.lit {
  background: var(--invert);
  color: var(--invert-text);
  border-color: var(--invert);
}

.dock-progress { margin-top: 0; }

.dock-now {
  padding: 6px 4px;
  font-family: var(--mono);
  font-size: 0.78rem;
  min-height: 32px;
  color: var(--muted);
}

.dock-msg {
  text-align: center;
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 2px;
  font-style: italic;
}

.dock-msg:empty { display: none; }

/* Nav tabs */
.tabs {
  display: flex;
  gap: 0;
  padding: 0 12px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--line);
}

.tabs::-webkit-scrollbar { display: none; }

.tab {
  flex: 1;
  min-width: 56px;
  padding: 10px 6px;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  margin-bottom: -1px;
}

.tab.active {
  color: var(--text);
  border-bottom-color: var(--invert);
}

/* Panels */
.panel { display: none; flex: 1; flex-direction: column; padding: 12px 12px 24px; }
.panel.active { display: flex; }

.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 10px;
  border: 1px solid var(--line);
}

.card h2 {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.album-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.album-ctrl {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 120px;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.album-ctrl select {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.82rem;
}

.album-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 2px 4px;
  border-top: 1px solid var(--line-soft);
  margin-top: 4px;
}

.album-header:first-child {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.album-title {
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.album-artist {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--muted);
}

.song-list { display: flex; flex-direction: column; gap: 6px; }

.song-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}

.song-btn:active { background: var(--surface2); }

.song-btn.selected {
  border-color: var(--invert);
  background: var(--surface2);
}

.song-btn.is-placeholder {
  opacity: 0.55;
  cursor: default;
}

.song-btn.is-placeholder .title::after {
  content: ' · soon';
  font-weight: 400;
  color: var(--muted);
  font-size: 0.75rem;
}

.dock-btn-play:disabled,
.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.song-btn .emoji { font-size: 1rem; opacity: 0.65; }
.song-btn .info { flex: 1; }
.song-btn .title { font-weight: 600; font-size: 0.88rem; }
.song-btn .meta {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--muted);
  margin-top: 3px;
}

.controls {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  background: transparent;
  color: var(--text);
}

.btn:active { background: var(--surface2); }

.btn-primary {
  background: var(--invert);
  color: var(--invert-text);
  border-color: var(--invert);
  flex: 1;
}

.btn-secondary {
  background: transparent;
  color: var(--muted);
}

.btn-accent,
.btn-gold {
  background: var(--surface2);
  color: var(--text);
  border-color: var(--line);
}

.status-line {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
}

.progress-bar {
  height: 2px;
  background: var(--line);
  border-radius: 0;
  margin-top: 8px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--invert);
  width: 0%;
  transition: width 0.1s linear;
}

.now-playing {
  text-align: center;
  padding: 8px;
  font-family: var(--mono);
  font-size: 0.8rem;
  min-height: 36px;
}

.note-pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 2px;
  font-size: 0.75rem;
  border: 1px solid rgba(0,0,0,0.15);
}

.cal-val {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  min-width: 36px;
  text-align: right;
  color: var(--muted);
}

/* Mirror */
.mirror-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: #000;
  display: none;
  flex-direction: column;
}

.mirror-screen.active { display: flex; }

.mirror-hint {
  position: absolute;
  top: 8px;
  left: 0; right: 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.6rem;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.06em;
  z-index: 2;
  pointer-events: none;
}

#mirror-canvas {
  flex: 1;
  width: 100%;
}

.mirror-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 3;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

.calibration { display: grid; gap: 10px; }

.cal-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cal-row label {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 80px;
}

.cal-row input[type="range"] {
  flex: 1;
  accent-color: var(--invert);
}

.camera-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: #000;
  border: 1px solid var(--line);
}

#camera-video, #camera-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#camera-overlay { pointer-events: none; }

.camera-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
  padding: 20px;
}

.message-box {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  resize: vertical;
  min-height: 70px;
  font-size: 0.85rem;
}

.share-link {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.share-link input {
  flex: 1;
  padding: 9px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted);
}

.stars-display {
  text-align: center;
  font-family: var(--mono);
  font-size: 1rem;
  padding: 12px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.sticker-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.sticker {
  aspect-ratio: 1;
  border-radius: var(--radius);
  background: transparent;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  opacity: 0.2;
  transition: opacity 0.2s, border-color 0.2s;
}

.sticker.unlocked {
  opacity: 1;
  border-color: var(--invert);
}

.role-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  color: var(--muted);
}

.role-badge.grandma,
.role-badge.kid { background: transparent; }

.mini-kb {
  display: flex;
  position: relative;
  height: 90px;
  margin: 10px 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.mini-key {
  flex: 1;
  border: 1px solid #333;
  cursor: pointer;
}

.mini-key.white { background: #e8e8e8; }
.mini-key.black {
  position: absolute;
  width: 6%;
  height: 60%;
  background: #111;
  z-index: 2;
}

.celebrate {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.85);
  flex-direction: column;
  gap: 14px;
}

.celebrate.active { display: flex; }

.celebrate .big {
  font-size: 2.5rem;
  font-weight: 300;
  width: 64px;
  height: 64px;
  border: 1px solid var(--invert);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--invert);
}

.celebrate h2 {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.cmd-block {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 0.62rem;
  line-height: 1.5;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 140px;
  overflow-y: auto;
}

.active-stream {
  border-color: var(--invert) !important;
}

a { color: var(--text); text-decoration: underline; text-underline-offset: 2px; }

/* ── Phone rotate mode ── */
body.phone-rotate-mode {
  overflow: hidden;
}

body.phone-rotate-mode .header,
body.phone-rotate-mode .tabs,
body.phone-rotate-mode .panel {
  display: none !important;
}

body.phone-rotate-mode .app {
  max-width: none;
}

body.phone-rotate-mode .score-dock {
  position: fixed;
  inset: 0;
  margin: 0;
  border-radius: 0;
  border: none;
  z-index: 80;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

body.phone-rotate-mode .score-dock-flip {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
}

body.phone-rotate-mode .score-dock-flip.is-rotate {
  transform: rotate(90deg) translateZ(0);
  width: 100dvh;
  height: 100dvw;
  max-height: 100dvw;
  max-width: 100dvh;
  margin: auto;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

body.phone-rotate-mode.phone-landscape .score-dock-flip {
  transform: none;
  width: 100%;
  height: auto;
  max-height: none;
  max-width: none;
}

body.phone-rotate-mode.phone-landscape .score-dock-flip.is-flip-h {
  transform: scaleX(-1) translateZ(0);
}

body.phone-rotate-mode .score-dock-flip.is-flip-h.is-rotate {
  transform: scaleX(-1) rotate(90deg) translateZ(0);
}

body.phone-rotate-mode .score-dock-flip.is-flip-h:not(.is-rotate) {
  transform: scaleX(-1);
}

body.phone-rotate-mode #keymap-canvas {
  height: 80px;
}

body.phone-rotate-mode .dock-transport-bar,
body.phone-rotate-mode .dock-speed {
  flex-shrink: 0;
}

.phone-rotate-exit {
  display: none;
  position: fixed;
  top: env(safe-area-inset-top, 8px);
  right: env(safe-area-inset-right, 8px);
  z-index: 90;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius);
  cursor: pointer;
}

body.phone-rotate-mode .phone-rotate-exit { display: block; }

@media (orientation: landscape) and (max-height: 500px) {
  .header { padding: 6px; }
  .score-dock { margin: 0 8px 6px; padding: 10px; }
  #keymap-canvas { height: 52px; }
  #notation-container { min-height: 80px; }
  .app { max-width: 100%; }
}