@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Noto+Sans+JP:wght@300;400;700&display=swap');

:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --border: #1e1e2e;
  --root-color: #ff4466;
  --chord-color: #33ddff;
  --scale-color: #44ff99;
  --text: #e0e0f0;
  --text-muted: #555577;
  --accent: #ff4466;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px;
  gap: 24px;
}

/* Scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.08) 2px, rgba(0,0,0,0.08) 4px);
  pointer-events: none;
  z-index: 100;
}

header { text-align: center; letter-spacing: 0.15em; }
header h1 {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
}
header p {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: 'Noto Sans JP', sans-serif;
}

/* MIDI status */
#midi-status {
  font-size: 0.65rem;
  padding: 6px 14px;
  border-radius: 2px;
  border: 1px solid;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all 0.3s;
}
#midi-status.connected { border-color: var(--scale-color); color: var(--scale-color); }
#midi-status.disconnected { border-color: #ff6644; color: #ff6644; }
#midi-status.searching { border-color: var(--text-muted); color: var(--text-muted); }

/* Controls */
.controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.control-group label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}
.control-group .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.btn:hover { border-color: var(--accent); color: var(--text); }
.btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  font-weight: 700;
}
#root-buttons .btn.active {
  background: var(--root-color);
  border-color: var(--root-color);
}
#chord-buttons .btn.active {
  background: var(--chord-color);
  border-color: var(--chord-color);
}
#scale-buttons .btn.active {
  background: var(--scale-color);
  border-color: var(--scale-color);
}
#inversion-row .btn.active {
  background: #ffaa33;
  border-color: #ffaa33;
}

/* Toggle buttons */
.toggle-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-start;
}
.toggle-btn {
  font-size: 0.65rem;
  padding: 5px 12px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-family: 'Space Mono', monospace;
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 6px;
}
.toggle-btn .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--border); transition: background 0.15s; }
.toggle-btn.active .dot { background: currentColor; }
.toggle-btn.active { color: var(--text); border-color: currentColor; }
.toggle-btn.t-chord.active { color: var(--chord-color); }
.toggle-btn.t-scale.active { color: var(--scale-color); }
.toggle-btn.t-inversion.active { color: #ffaa33; }

/* Inversion selector */
#inversion-row { display: flex; gap: 4px; flex-wrap: wrap; }

/* Capo display */
#capo-display {
  display: inline-block;
  font-size: 0.7rem;
  padding: 6px 10px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  min-width: 44px;
  text-align: center;
  background: var(--surface);
  border-radius: 2px;
  font-family: 'Space Mono', monospace;
  transition: color 0.15s, border-color 0.15s;
}
#capo-display[data-nonzero="true"] {
  color: #ffaa33;
  border-color: #ffaa33;
}

/* Grid wrapper */
.grid-wrapper {
  position: relative;
  width: 100%;
}

#scale-key-label {
  text-align: center;
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  min-height: 1em;
}

/* Launchpad grid — 9x9 with surrounding buttons */
.grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  gap: 4px;
  width: 100%;
  aspect-ratio: 1;
  background: #0c0c14;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  box-shadow: 0 0 40px rgba(255,68,102,0.05);
}

.pad {
  border-radius: 3px;
  aspect-ratio: 1;
  position: relative;
  cursor: pointer;
  transition: background 0.12s, box-shadow 0.12s;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.pad::after {
  content: attr(data-note);
  font-size: clamp(0.55rem, 1.6vw, 0.85rem);
  color: rgba(255,255,255,0.4);
  font-family: 'Space Mono', monospace;
  pointer-events: none;
  line-height: 1;
}
.pad.root {
  background: var(--root-color);
  box-shadow: 0 0 12px var(--root-color), 0 0 4px var(--root-color);
}
.pad.root::after { color: rgba(0,0,0,0.6); }
.pad.chord {
  background: var(--chord-color);
  box-shadow: 0 0 10px var(--chord-color);
}
.pad.chord::after { color: rgba(0,0,0,0.5); }
.pad.bass {
  background: #ffaa33;
  box-shadow: 0 0 10px #ffaa33;
}
.pad.bass::after { color: rgba(0,0,0,0.5); }
.pad.scale-only {
  background: var(--scale-color);
  box-shadow: 0 0 8px var(--scale-color);
}
.pad.scale-only::after { color: rgba(0,0,0,0.4); }
.pad.off {
  background: #000;
}
.pad.fn-btn {
  background: #1a1a28;
  border-radius: 50%;
  border: 1px solid #2a2a3a;
}
.pad.fn-btn::after {
  font-size: clamp(0.35rem, 1vw, 0.5rem);
  color: rgba(255,255,255,0.4);
}
.pad.fn-btn:hover { border-color: var(--accent); }
.pad.fn-btn.fn-active {
  background: #ff9933;
  box-shadow: 0 0 8px #ff9933;
}
.pad.fn-btn.fn-active::after { color: rgba(0,0,0,0.6); }
.pad.fn-corner { visibility: hidden; }

/* Current chord display */
#chord-display {
  text-align: center;
  min-height: 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
#chord-name {
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  transition: all 0.2s;
}
#chord-notes {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
}
#chord-interval {
  font-size: 0.58rem;
  color: #444466;
  letter-spacing: 0.1em;
}

/* Detected chord display */
#detected-chord {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  min-height: 20px;
  letter-spacing: 0.08em;
}
.detected-label {
  color: var(--text-muted);
  letter-spacing: 0.15em;
  font-size: 0.5rem;
  text-transform: uppercase;
  flex-shrink: 0;
}

/* Legend */
.legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: flex-start;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  box-shadow: 0 0 6px currentColor;
}

/* MIDI device row */
#device-select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  padding: 6px 10px;
  border-radius: 2px;
  cursor: pointer;
  max-width: 260px;
}

.send-btn {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: 'Space Mono', monospace;
  font-size: 0.65rem;
  padding: 8px 20px;
  cursor: pointer;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all 0.15s;
}
.send-btn:hover { background: var(--accent); color: #000; }
.send-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.send-btn:disabled:hover { background: transparent; color: var(--accent); }

.midi-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.pad.pressed {
  filter: brightness(1.8);
  transform: scale(0.92);
  transition: none;
}
.pad.off.pressed {
  background: #2a2a3a;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.15);
}

.volume-row {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.volume-row input[type="range"] {
  width: 100px;
  accent-color: var(--accent);
}

.metro-row {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.metro-row input[type="range"] {
  width: 100px;
  accent-color: var(--accent);
}
#metro-bpm-num {
  width: 5.5em;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 0.6rem;
  text-align: center;
  padding: 4px 4px;
  border-radius: 2px;
}
#metro-bpm-num:focus {
  outline: none;
  border-color: var(--accent);
}
#metro-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  font-weight: 700;
}

#log {
  width: 100%;
  height: 120px;
  background: #06060c;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 10px;
  overflow-y: auto;
  font-family: 'Space Mono', monospace;
  font-size: 0.55rem;
  color: var(--text-muted);
  line-height: 1.6;
}
#log .log-in  { color: var(--chord-color); }
#log .log-out { color: var(--scale-color); }
#log .log-err { color: #ff6644; }

/* ================================================================
   Three-column layout
   ================================================================ */

body {
  align-items: center;
}

.app-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(380px, 1fr) minmax(220px, 280px);
  gap: 20px 28px;
  width: 100%;
  max-width: 1160px;
  align-items: start;
}

/* Left panel */
.panel-left {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Center panel */
.panel-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

/* Right panel */
.panel-right {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Section block in right panel */
.panel-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.panel-label {
  font-size: 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.panel-section--log #log {
  height: 160px;
}

/* Responsive: collapse to single column below 860px */
@media (max-width: 860px) {
  .app-layout {
    grid-template-columns: 1fr;
  }
  .panel-left  { order: 2; }
  .panel-center { order: 1; }
  .panel-right { order: 3; }
  .toggle-row { justify-content: center; }
  .midi-row   { justify-content: center; }
}

/* ================================================================
   Utility
   ================================================================ */
.hidden { display: none; }

/* MIDI hint */
#midi-hint {
  font-size: 0.55rem;
  color: var(--text-muted);
  font-family: 'Noto Sans JP', sans-serif;
}

/* Clear button disabled override */
#clear-btn:disabled {
  border-color: var(--text-muted);
  color: var(--text-muted);
}

/* Root label */
.control-group label.root-label {
  color: var(--root-color);
}

/* Detected chord spans */
.detected-chord-empty { color: var(--text-muted); }
.detected-chord-name  { color: var(--text-muted); }
.detected-chord-name.exact { color: var(--chord-color); }
.detected-chord-sep   { color: var(--border); }