:root {
  --bg-0: #05060a;
  --bg-1: #0e1018;
  --bg-2: #161a26;
  --bg-3: #1f2435;
  --line: #262c40;
  --text: #f5f7fb;
  --text-2: #a4adc4;
  --text-3: #5b6483;
  --accent: #00d4ff;
  --accent-2: #6ee7ff;
  --accent-glow: rgba(0, 212, 255, 0.55);
  --warm: #ff9f43;
  --warm-glow: rgba(255, 159, 67, 0.7);
  --danger: #ff4f6e;
}

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

html, body {
  width: 600px;
  height: 600px;
  overflow: hidden;
  background: #000;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

#app {
  width: 100%;
  height: 100%;
  position: relative;
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 28px;
  gap: 18px;
}
.screen.hidden { display: none; }

/* ============================================================
   FOCUS RING — critical for d-pad clarity
   ============================================================ */
.focusable {
  cursor: pointer;
  outline: none;
  border: 3px solid transparent;
  transition: transform 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.focusable:focus {
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-1px);
}

/* ============================================================
   HOME
   ============================================================ */
.brand-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding-bottom: 4px;
}
.brand-mark {
  font-size: 38px;
  color: var(--accent);
  text-shadow: 0 0 14px var(--accent-glow);
  line-height: 1;
}
.brand-text {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 6px;
  color: var(--text-2);
}

.summary-card {
  flex: 1;
  background: #000;
  border-radius: 22px;
  padding: 28px 24px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 22px;
}
.summary-bpm {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
}
.summary-num {
  font-size: 150px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -6px;
  line-height: 0.9;
  font-variant-numeric: tabular-nums;
  font-family: 'Courier New', 'SF Mono', monospace;
  text-shadow: 0 0 30px rgba(0, 212, 255, 0.25);
}
.summary-unit {
  margin-top: 6px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 6px;
  color: var(--text-3);
}
.summary-meta {
  display: flex;
  justify-content: center;
  gap: 14px;
}
.summary-chip {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #000;
  border: 1px solid #1a1f2e;
  border-radius: 14px;
  padding: 14px 22px;
}
.chip-label {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--text-2);
}
.chip-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
}

.home-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ============================================================
   SHARED BUTTONS
   ============================================================ */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  border-radius: 18px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 3px;
  padding: 20px;
  min-height: 70px;
  background: var(--bg-2);
  color: var(--text);
}
.btn-icon { font-size: 22px; line-height: 1; }
.btn-label { line-height: 1; }

.btn-primary {
  background: linear-gradient(180deg, var(--accent), #0093b8);
  color: #00141a;
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.25);
}
.btn-primary:focus {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
}
.btn-ghost {
  background: transparent;
  border: 2px solid var(--line);
  color: var(--text-2);
  font-size: 14px;
  letter-spacing: 4px;
  min-height: 50px;
  padding: 14px;
}
.btn-ghost:focus {
  background: var(--bg-2);
  color: var(--text);
}

/* ============================================================
   STEP HEADER (back, title, pips)
   ============================================================ */
.step-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 6px 0;
  flex-shrink: 0;
}
.step-back {
  font-size: 32px;
  color: var(--text-2);
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-2);
}
.step-back:focus {
  background: var(--bg-3);
  color: var(--accent);
}
.step-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--text);
}
.step-pips {
  display: flex;
  gap: 8px;
  align-items: center;
  width: 50px;
  justify-content: flex-end;
}
.pip {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 1px solid var(--line);
}
.pip.on {
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  border-color: var(--accent);
}

.step-foot {
  flex-shrink: 0;
}

.picker-hint {
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 5px;
  color: var(--text-3);
  flex-shrink: 0;
}

/* ============================================================
   STEP 1 — TEMPO PICKER
   ============================================================ */
.picker-tempo {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 22px;
}
.bpm-stage {
  background: #000;
  border-radius: 22px;
  padding: 24px 16px 18px;
  text-align: center;
}
.bpm-big {
  font-size: 152px;
  font-weight: 800;
  letter-spacing: -8px;
  line-height: 0.9;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-family: 'Courier New', 'SF Mono', monospace;
  text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}
.bpm-sub {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--text-3);
}
.bpm-controls {
  display: flex;
  gap: 8px;
}
.step-btn {
  flex: 1;
  background: var(--bg-2);
  border-radius: 16px;
  color: var(--text);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-btn:focus {
  background: var(--bg-3);
}
.step-btn-tap {
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  letter-spacing: 3px;
}
.step-btn-tap.tapping {
  background: var(--accent);
  color: #00141a;
}

.step-btn-nod {
  background: rgba(94, 234, 212, 0.1);
  color: #5eead4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 6px 4px;
  font-size: 12px;
  letter-spacing: 2px;
}
.step-btn-nod .nod-glyph {
  display: inline-flex;
  line-height: 0;
}
.step-btn-nod .nod-label {
  font-weight: 800;
  letter-spacing: 2px;
}
.step-btn-nod.listening {
  background: #5eead4;
  color: #00241e;
  animation: nod-pulse 0.9s ease-in-out infinite;
}
.step-btn-nod.nodded {
  background: #b6f5e6;
  color: #00241e;
}
@keyframes nod-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.6); }
  50%      { box-shadow: 0 0 0 14px rgba(94, 234, 212, 0); }
}

/* ============================================================
   STEP 2 — TIME SIGNATURE
   ============================================================ */
.picker-time {
  flex: 1;
  display: flex;
  align-items: center;
}
.time-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 12px;
  height: 100%;
}
.big-tile {
  background: var(--bg-2);
  border-radius: 18px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  padding: 14px;
  color: var(--text);
}
.big-tile:focus {
  background: var(--bg-3);
}
.tile-num {
  font-size: 78px;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  font-family: 'Courier New', 'SF Mono', monospace;
}
.tile-sub {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-3);
}

/* ============================================================
   STEP 3 — NOTE VALUE
   ============================================================ */
.picker-note {
  flex: 1;
  display: flex;
  align-items: center;
}
.note-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 14px;
  height: 100%;
}
.note-tile {
  background: var(--bg-2);
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text);
}
.note-tile:focus { background: var(--bg-3); }
.note-glyph {
  font-size: 64px;
  line-height: 1;
}
.note-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--text-2);
}

.btn-go {
  background: linear-gradient(180deg, #2dd4bf, #0d9488);
  color: #002420;
  box-shadow: 0 8px 24px rgba(45, 212, 191, 0.3);
}
.btn-go:focus {
  background: linear-gradient(180deg, #5eead4, #2dd4bf);
}

/* ============================================================
   PLAYING SCREEN
   ============================================================ */
#playing { padding: 24px; background: #000; }

.play-full {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 0;
}

.play-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  position: relative;
  flex-shrink: 0;
}

.play-shrink {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: #000;
  border: 2px solid #1a1f2e;
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.play-shrink:focus {
  color: var(--accent);
}
.play-tag {
  background: #000;
  border: 1px solid #1a1f2e;
  color: var(--text);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 3px;
  padding: 12px 22px;
  border-radius: 14px;
  min-width: 96px;
  text-align: center;
}

.play-stage {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
}

.beat-dots {
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 540px;
  z-index: 2;
}
.beat-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 3px solid var(--bg-3);
  transition: background 0.04s, border-color 0.04s, box-shadow 0.04s, transform 0.06s;
}
.beat-dot.active {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 28px var(--accent-glow);
  transform: scale(1.18);
}
.beat-dot.accent {
  background: var(--warm);
  border-color: var(--warm);
  box-shadow: 0 0 32px var(--warm-glow);
  transform: scale(1.25);
}

.play-bpm {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  z-index: 2;
}
.play-bpm-num {
  font-size: 140px;
  font-weight: 800;
  letter-spacing: -6px;
  line-height: 0.9;
  font-variant-numeric: tabular-nums;
  font-family: 'Courier New', 'SF Mono', monospace;
  color: var(--text);
  text-shadow: 0 0 24px rgba(0, 212, 255, 0.25);
  transition: color 0.06s, text-shadow 0.06s;
}
.play-bpm-num.flash-beat {
  color: var(--accent);
  text-shadow: 0 0 36px var(--accent-glow);
}
.play-bpm-num.flash-accent {
  color: var(--warm);
  text-shadow: 0 0 36px var(--warm-glow);
}
.play-bpm-unit {
  margin-top: 6px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 6px;
  color: var(--text-3);
}

.pulse-ring {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 2px solid rgba(0, 212, 255, 0.0);
  pointer-events: none;
  z-index: 1;
  transition: border-color 0.05s, transform 0.18s ease-out, opacity 0.4s ease-out;
  opacity: 0;
}
.pulse-ring.pulse {
  opacity: 1;
  border-color: rgba(0, 212, 255, 0.6);
  transform: scale(1.06);
}
.pulse-ring.pulse-accent {
  opacity: 1;
  border-color: rgba(255, 159, 67, 0.7);
  transform: scale(1.1);
}

.play-foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}
.btn-stop {
  background: linear-gradient(180deg, var(--danger), #c8243f);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 79, 110, 0.3);
}
.btn-stop:focus {
  background: linear-gradient(180deg, #ff7a92, var(--danger));
}
.btn-edit {
  font-size: 12px;
  letter-spacing: 5px;
  min-height: 42px;
  padding: 10px;
}

/* ============================================================
   COMPACT / HUD MODE — single-line readout pinned to the top
   ============================================================ */
.play-mini {
  display: none;
  align-items: center;
  gap: 14px;
  height: 64px;
  padding: 0 16px;
  background: #000;
  border-radius: 16px;
  flex-shrink: 0;
}

#playing.small-mode { padding: 8px; justify-content: flex-start; gap: 0; }
#playing.small-mode .play-mini { display: flex; }
#playing.small-mode .play-full { display: none; }

.mini-dots {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}
.mini-dots .beat-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #1a1f2e;
  border: 2px solid #1a1f2e;
  transition: background 0.04s, border-color 0.04s, box-shadow 0.04s, transform 0.06s;
}
.mini-dots .beat-dot.active {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.2);
}
.mini-dots .beat-dot.accent {
  background: var(--warm);
  border-color: var(--warm);
  box-shadow: 0 0 14px var(--warm-glow);
  transform: scale(1.25);
}

.mini-readout {
  flex: 1;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  font-family: 'Courier New', 'SF Mono', monospace;
}
.mini-note { font-size: 26px; color: var(--accent); line-height: 1; }
.mini-equals { font-size: 20px; color: var(--text-3); font-weight: 300; }
.mini-bpm {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
  transition: color 0.06s, text-shadow 0.06s;
}
.mini-bpm.flash-beat   { color: var(--accent); text-shadow: 0 0 12px var(--accent-glow); }
.mini-bpm.flash-accent { color: var(--warm);   text-shadow: 0 0 14px var(--warm-glow); }
.mini-divider { font-size: 22px; color: var(--text-3); }
.mini-time {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-2);
  letter-spacing: 1px;
}

.mini-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #000;
  border: 2px solid #1a1f2e;
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.mini-btn:focus { color: var(--accent); }

/* ============================================================
   UTILITY
   ============================================================ */
.hidden { display: none !important; }