/* ═══════════════════════════════════════════════════
   DAEAC#E — FRETBOARD TRAINER
   ═══════════════════════════════════════════════════ */

:root {
  --bg:       #08080a;
  --surface:  #0c0c0f;
  --card:     #121216;
  --border:   #1f1f26;
  --border-soft: #18181d;
  --text:     #c8c8d0;
  --dim:      #4a4a56;
  --accent:   #e8c547;
  --scale-in: #4a9eff;
  --radius:   10px;
  --gap:      16px;
}

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

html { scrollbar-color: #2a2a34 var(--bg); }

body::before {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(232, 197, 71, 0.06), transparent 60%),
    radial-gradient(1000px 600px at 100% 110%, rgba(74, 158, 255, 0.05), transparent 55%),
    var(--bg);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 24px 60px;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #26262e; border-radius: 6px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: #3a3a46; }

/* ── CARD (shared surface) ─────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ── HEADER ────────────────────────────────── */
.app-header {
  width: 100%;
  max-width: 1520px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 6px 6px 16px;
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand-mark {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Syne', sans-serif;
  font-weight: 800; font-size: 1.4rem;
  color: #000; background: var(--accent);
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(232, 197, 71, 0.25);
}

.brand-text h1 {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.06em;
  color: #fff;
  line-height: 1.05;
}

.brand-text .tagline {
  font-size: 0.62rem;
  color: var(--dim);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.header-chips { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.chip {
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 7px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--dim);
  background: var(--surface);
  white-space: nowrap;
}
.chip-tuning { color: #a9a9b4; }
.chip-mode { color: var(--accent); border-color: rgba(232,197,71,0.4); }

button.chip-btn {
  font-family: 'Share Tech Mono', monospace;
  cursor: pointer;
  transition: all 0.12s;
}
button.chip-btn:hover { border-color: var(--dim); color: #fff; }
button.chip-btn.alt { border-color: #4ecdc4; color: #4ecdc4; }

/* ── LAYOUT GRID ───────────────────────────── */
.layout {
  width: 100%;
  max-width: 1520px;
  margin-top: 18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 372px;
  gap: var(--gap);
  align-items: start;
}

.main-col {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  min-width: 0;
}

.side-col {
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

/* ── CONTROLS ──────────────────────────────── */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  align-items: flex-end;
  padding: 14px 18px;
}

.ctrl-group { display: flex; flex-direction: column; gap: 6px; }

.ctrl-label {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}

.root-btns { display: flex; gap: 4px; }

.root-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.76rem;
  width: 36px; height: 30px;
  cursor: pointer;
  border-radius: 5px;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.root-btn:hover { border-color: var(--dim); color: #fff; }
.root-btn.active { background: var(--accent); border-color: var(--accent); color: #000; font-weight: bold; }

select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.76rem;
  padding: 5px 10px;
  height: 30px;
  cursor: pointer;
  outline: none;
  appearance: none;
  min-width: 160px;
  border-radius: 5px;
}
select:focus { border-color: var(--accent); }

.sel-wrap { position: relative; }
.sel-wrap::after {
  content: '▾';
  position: absolute; right: 9px; top: 50%;
  transform: translateY(-50%);
  color: var(--dim); pointer-events: none; font-size: 0.7rem;
}

.label-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  padding: 5px 12px; height: 30px;
  cursor: pointer; letter-spacing: 0.08em;
  border-radius: 5px;
  transition: all 0.12s;
}
.label-toggle.active { border-color: var(--accent); color: var(--accent); }

/* ── CHAOS DIAL ────────────────────────────── */
.chaos-wrap { display: flex; flex-direction: column; gap: 6px; }
.chaos-row { display: flex; align-items: center; gap: 10px; }
.chaos-tags { display: flex; gap: 6px; font-size: 0.56rem; letter-spacing: 0.1em; text-transform: uppercase; }
.chaos-tag-lo { color: #4a9eff; }
.chaos-tag-hi { color: #ff4444; }

#chaosSlider {
  -webkit-appearance: none;
  appearance: none;
  width: 150px; height: 4px;
  outline: none; cursor: pointer;
  border-radius: 2px;
  background: linear-gradient(to right, #4a9eff 0%, #e8c547 50%, #ff4444 100%);
}
#chaosSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #333;
  cursor: pointer;
}
#chaosSlider::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #333;
  cursor: pointer;
}

#chaosVal { font-size: 0.7rem; color: var(--dim); min-width: 28px; text-align: right; }

/* ── BOARD ZONE ────────────────────────────── */
.board-zone {
  display: flex;
  gap: 12px;
  align-items: stretch;
}

.board-wrap {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  padding: 16px 10px;
}

#fretboard { display: block; margin: 0 auto; }

/* ── PLAY BAR (keyboard) ───────────────────── */
.kb-bar {
  width: 72px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  padding: 10px 6px 8px;
}

.kb-title {
  font-size: 0.56rem;
  letter-spacing: 0.18em;
  color: var(--dim);
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  width: 100%;
  text-align: center;
}

.kb-zone { position: relative; width: 100%; flex: 1; min-height: 0; }
.kb-lanes { height: 100%; display: flex; flex-direction: column; }
.kb-lane {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.66rem;
  color: #33333c;
  border-right: 1px dashed #1c1c22;
  opacity: 0.85;
}
.kb-lane.used { color: #5a5a66; }

.kb-chips { position: absolute; inset: 0; z-index: 1; }

.kb-chip {
  position: absolute;
  left: 4px; right: 4px;
  height: calc(100% / 6 - 8px);
  transform: translateY(-50%);
  background: #17171c;
  border: 1px solid #33333d;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  cursor: grab;
  pointer-events: auto;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.5);
  user-select: none;
  -webkit-user-select: none;
}
.kb-chip:hover { border-color: var(--accent); }

.kb-chip-keys {
  font-size: 0.46rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
}

.kb-chip-string {
  font-size: 0.56rem;
  color: #fff;
}

.kb-snap {
  margin-top: auto;
  width: 100%;
  font-size: 0.5rem;
  letter-spacing: 0.06em;
  text-align: center;
  padding: 6px 1px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--dim);
  background: var(--surface);
  cursor: pointer;
  text-transform: uppercase;
  line-height: 1.35;
  transition: all 0.12s;
}
.kb-snap:hover { color: var(--text); border-color: var(--dim); }
.kb-snap.on { color: #4ecdc4; border-color: #4ecdc4; }

/* ── FRETBOARD SVG ─────────────────────────── */
.fret-line    { stroke: #1e1e22; stroke-width: 1.5; }
.nut-line     { stroke: #3a3a42; stroke-width: 5; }
.string-line  { stroke: #2a2a30; }
.fret-num     { fill: #6a6a76; font-family: 'Share Tech Mono', monospace; font-size: 13px; font-weight: bold; text-anchor: middle; }
.string-label { fill: var(--text); font-family: 'Syne', sans-serif; font-weight: 700; font-size: 14px; text-anchor: middle; dominant-baseline: middle; }
.marker-dot   { fill: #2a2a34; }

.note-dot {
  cursor: pointer;
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.1s;
}
.note-dot:hover { transform: scale(1.16); }

.note-dot circle { transition: stroke 0.1s, stroke-width 0.1s; }
.note-dot:hover circle { stroke: #fff; stroke-width: 2.5; }
.note-dot text { font-weight: bold; }

.chord-line {
  stroke: #e8c547;
  stroke-width: 2;
  stroke-dasharray: 4 3;
  opacity: 0.6;
  pointer-events: none;
}

/* ── INFO PANEL ────────────────────────────── */
.info-panel {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
}

.ip-cell {
  padding: 15px 20px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}
.ip-cell + .ip-cell { border-left: 1px solid var(--border); }
.ip-cell .lbl { font-size: 0.58rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--dim); }
.ip-cell .val {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  color: #fff;
  min-height: 1.7rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ip-cell .val.accent { color: var(--accent); }

.note-swatch {
  display: inline-block;
  width: 11px; height: 11px;
  border-radius: 3px;
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.18);
}

/* ── MODE TABS (vertical, sidebar) ─────────── */
.mode-tabs {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 100%;
}

.mode-tab {
  position: relative;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  padding: 10px 15px;
  cursor: pointer;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 7px;
  transition: all 0.12s;
}
.mode-tab:hover { color: var(--text); border-color: var(--dim); }
.mode-tab.active {
  color: var(--accent);
  border-color: rgba(232, 197, 71, 0.55);
  background: #17150c;
}
.mode-tab.active::before {
  content: '';
  position: absolute;
  left: -1px; top: 22%; bottom: 22%;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

/* ── SIDE PANELS ───────────────────────────── */
.side-panels {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 2px;
}

.side-panel { padding: 14px 16px; }

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.panel-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
}
.panel-hint { font-size: 0.56rem; color: var(--dim); letter-spacing: 0.04em; }

/* ── TRACE + LEGEND (explorer panel) ───────── */
.trace-panel {
  background: #0a0a0f;
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 0.7rem;
  line-height: 1.8;
  color: var(--dim);
  font-family: 'Share Tech Mono', monospace;
  min-height: 28px;
}
.trace-step { color: #4a9eff; }
.trace-op   { color: #555; }
.trace-val  { color: #c8c8d0; font-weight: bold; }
.trace-val.yes  { color: #4ecdc4; }
.trace-val.no   { color: #ff6b6b; }

.legend {
  margin-top: 12px;
  display: flex;
  gap: 10px 16px;
  flex-wrap: wrap;
  align-items: center;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ── CHORD PANEL ───────────────────────────── */
.chord-section {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-soft);
}
.chord-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.chord-section .root-btns { display: flex; gap: 3px; flex-wrap: wrap; margin-top: 4px; }
.chord-section .root-btn { width: 31px; height: 26px; font-size: 0.68rem; }

.chord-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  padding: 4px 12px;
  height: 28px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 5px;
  transition: all 0.12s;
  vertical-align: middle;
}
.chord-btn:hover { border-color: var(--accent); color: var(--accent); }

.strum-btn { border-color: #4ecdc4; color: #4ecdc4; }
.strum-btn:hover { background: #4ecdc4; color: #000; font-weight: bold; }
.clear-btn { border-color: #ff6b6b; color: #ff6b6b; }
.clear-btn:hover { background: #ff6b6b; color: #000; font-weight: bold; }
.save-btn { border-color: var(--accent); color: var(--accent); }
.save-btn:hover { background: var(--accent); color: #000; font-weight: bold; }

.voicing-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.voicing-item {
  background: #111114;
  border: 1px solid #1e1e24;
  border-radius: 5px;
  padding: 6px 10px;
  cursor: pointer;
  transition: all 0.1s;
  font-size: 0.68rem;
  line-height: 1.5;
}
.voicing-item:hover { border-color: var(--dim); }
.voicing-item.sel { border-color: var(--accent); background: #1a1a0e; }

.voicing-frets   { color: #fff; font-weight: bold; }
.voicing-detail  { color: var(--accent); margin-left: 6px; }
.voicing-meta    { color: var(--dim); margin-left: 6px; font-size: 0.62rem; }

.chord-notes-section { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ── KEYBOARD CHEATSHEET ───────────────────── */
.kb-cheat { text-align: left; }
.kb-cheat summary {
  cursor: pointer;
  list-style: none;
  padding: 9px 14px;
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  user-select: none;
}
.kb-cheat summary::-webkit-details-marker { display: none; }
.kb-cheat[open] summary { border-bottom: 1px solid var(--border-soft); }
.kb-cheat ul { padding: 9px 14px 12px; font-size: 0.62rem; color: var(--dim); line-height: 1.85; }
.kb-cheat li { list-style: none; position: relative; padding-left: 12px; }
.kb-cheat li::before { content: '›'; position: absolute; left: 0; color: #555; }
.kb-cheat b { color: var(--text); font-weight: normal; }

/* ── CHORD LIBRARY ─────────────────────────── */
.lib-section { padding: 12px 14px 12px; display: flex; flex-direction: column; gap: 10px; }

.lib-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.lib-count-badge {
  font-size: 0.62rem;
  color: #000;
  background: var(--accent);
  border-radius: 999px;
  min-width: 20px; height: 20px;
  padding: 0 6px;
  display: flex; align-items: center; justify-content: center;
  font-weight: bold;
}

.lib-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
  min-height: 42px;
}

.lib-empty { font-size: 0.68rem; color: var(--dim); line-height: 1.6; }
.lib-empty b { color: var(--text); font-weight: normal; }

.lib-tile {
  position: relative;
  background: #101014;
  border: 1px solid #23232c;
  border-radius: 6px;
  padding: 7px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  transition: border-color 0.1s, background 0.1s;
}
.lib-tile:hover { border-color: #3a3a46; background: #13131a; }

.lib-label { font-family: 'Syne', sans-serif; font-weight: 700; font-size: 0.72rem; color: #fff; }
.lib-frets { font-size: 0.6rem; color: var(--dim); letter-spacing: 0.08em; }

.lib-count {
  position: absolute;
  top: 5px; right: 26px;
  font-size: 0.58rem;
  color: #4ecdc4;
}

.lib-del {
  position: absolute;
  top: 2px; right: 5px;
  background: none; border: none; color: #555; cursor: pointer;
  font-size: 13px; line-height: 1; padding: 2px 4px;
}
.lib-del:hover { color: #ff6b6b; }

.lib-drag-ghost {
  position: fixed;
  z-index: 300;
  pointer-events: none;
  opacity: 0.92;
  transform: rotate(2deg);
  width: 190px;
  background: #17171c;
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 8px 12px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.66rem;
  color: var(--text);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.65);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.lib-drag-ghost .ghost-label { color: #fff; font-family: 'Syne', sans-serif; font-weight: 700; font-size: 0.8rem; }
.lib-drag-ghost .ghost-frets { color: var(--dim); font-size: 0.6rem; }

.lib-hint {
  font-size: 0.52rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #3a3a46;
}

/* ── PROGRESSION PLAYER ────────────────────── */
.prog-transport {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 12px;
  margin-bottom: 12px;
}
.prog-btn {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-family: 'Share Tech Mono', monospace;
  font-size: 0.66rem; padding: 6px 12px; height: 30px; cursor: pointer;
  text-transform: uppercase; letter-spacing: 0.06em; transition: all 0.12s;
  border-radius: 5px;
}
.prog-btn:hover { border-color: var(--accent); color: var(--accent); }
.prog-btn.on { border-color: #4ecdc4; color: #4ecdc4; }

.prog-setting { display: flex; flex-direction: column; gap: 4px; }
.prog-setting label {
  font-size: 0.58rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim);
}
.prog-setting select { min-width: 92px; }
.prog-setting input[type="number"] {
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  font-family: 'Share Tech Mono', monospace; font-size: 0.76rem;
  height: 30px; width: 64px; padding: 5px 8px; outline: none; border-radius: 5px;
}
.prog-setting input[type="number"]:focus { border-color: var(--accent); }
.prog-setting.hidden { display: none; }

.prog-count { font-size: 0.64rem; color: var(--dim); letter-spacing: 0.08em; padding-bottom: 8px; }

.prog-empty { padding: 16px 4px; color: var(--dim); font-size: 0.74rem; line-height: 1.7; }
.prog-empty b { color: var(--text); }

.prog-scroll { overflow-x: auto; background: #0d0d11; border: 1px solid var(--border-soft); border-radius: 6px; }
.prog-inner { position: relative; }

.prog-ruler { position: relative; height: 26px; border-bottom: 1px solid var(--border-soft); }
.prog-tick { position: absolute; bottom: 0; width: 1px; height: 8px; background: #2c2c34; pointer-events: none; }
.prog-tick.strong { height: 15px; background: #5a5a66; }
.prog-measure-label { position: absolute; top: 5px; font-size: 0.58rem; color: var(--dim); pointer-events: none; }

.prog-track { position: relative; height: 76px; }
.prog-block {
  position: absolute; top: 7px; height: 62px;
  background: #15151a; border: 1px solid #26262e;
  border-radius: 4px; overflow: hidden; cursor: grab;
  user-select: none; -webkit-user-select: none;
  transition: border-color 0.1s, background 0.1s;
  display: flex; flex-direction: column; box-sizing: border-box;
}
.prog-block:hover { border-color: #3a3a44; }
.prog-block.playing { border-color: var(--accent); background: #1b180e; box-shadow: 0 0 0 1px var(--accent); }
.prog-block.dragging { opacity: 0.65; cursor: grabbing; z-index: 5; }

.prog-block-label { padding: 6px 8px 0; color: #fff; font-family: 'Syne', sans-serif; font-weight: 700; font-size: 0.76rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; pointer-events: none; }
.prog-block-frets { padding: 2px 8px 0; color: var(--dim); font-size: 0.6rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; letter-spacing: 0.08em; pointer-events: none; }

.prog-del {
  position: absolute; top: 3px; right: 4px;
  background: none; border: none; color: #555; cursor: pointer;
  font-size: 14px; line-height: 1; padding: 2px 4px; z-index: 2;
}
.prog-del:hover { color: #ff6b6b; }

.prog-resize { position: absolute; top: 0; right: 0; bottom: 0; width: 10px; cursor: ew-resize; display: flex; align-items: center; justify-content: center; }
.prog-resize div { width: 3px; height: 30px; background: #2e2e36; border-radius: 2px; pointer-events: none; transition: background 0.1s; }
.prog-resize:hover div { background: var(--accent); }

.prog-playhead {
  position: absolute; top: 0; bottom: 0; width: 2px;
  background: var(--accent); pointer-events: none; z-index: 3;
  box-shadow: 0 0 8px rgba(232, 197, 71, 0.7);
}

.prog-hint { margin-top: 8px; font-size: 0.58rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--dim); line-height: 1.6; }

body.prog-dragging { cursor: grabbing !important; user-select: none; -webkit-user-select: none; }

/* ── TOOLTIP ───────────────────────────────── */
#tooltip {
  position: fixed;
  background: #18181c; border: 1px solid var(--border);
  padding: 8px 12px; font-size: 0.7rem; line-height: 1.6;
  pointer-events: none; opacity: 0; transition: opacity 0.1s;
  z-index: 100; white-space: nowrap; color: var(--text);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}
#tooltip.visible { opacity: 1; }
#tooltip strong { color: #fff; font-family: 'Syne', sans-serif; font-size: 0.88rem; }
#tooltip .t-interval { color: var(--accent); }
#tooltip .t-scale    { color: var(--scale-in); }

/* ── RIPPLE ────────────────────────────────── */
@keyframes ripple {
  0%   { r: 15; opacity: 0.9; }
  100% { r: 32; opacity: 0; }
}
.ripple-circle { animation: ripple 0.4s ease-out forwards; pointer-events: none; }

/* ── RESPONSIVE ────────────────────────────── */
@media (max-width: 1080px) {
  body { padding: 18px 14px 48px; }
  .layout { grid-template-columns: 1fr; }
  .side-col { position: static; max-height: none; }
  .mode-tabs { flex-direction: row; }
  .mode-tab { flex: 1; text-align: center; padding: 9px 10px; }
  .mode-tab.active::before { left: 8%; right: 8%; top: auto; bottom: -1px; width: auto; height: 3px; border-radius: 2px 2px 0 0; }
  .side-panels { overflow: visible; }
  .kb-bar { width: 84px; }
  .board-zone { flex-direction: column; }
  .kb-zone { height: 260px; }
}

/* ── TUNING (preset select + custom editor) ── */
.tuning-wrap { min-width: 170px; }
.custom-tuning-wrap { flex-basis: 100%; align-items: flex-start; gap: 8px; }

.tuning-slot-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.tuning-slot {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  padding: 8px 7px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
}

.tuning-slot .tuning-str {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  line-height: 1;
}

.tuning-slot select {
  min-width: 0;
  width: 56px;
  height: 26px;
  padding: 2px 6px;
  font-size: 0.72rem;
  text-align: center;
}
.tuning-slot select.tuning-oct { width: 42px; }

.tuning-note-btn {
  width: 26px;
  height: 24px;
  cursor: pointer;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--dim);
  border-radius: 5px;
  font-size: 0.62rem;
  line-height: 1;
  transition: all 0.12s;
}
.tuning-note-btn:hover { border-color: var(--accent); color: var(--accent); }

.tuning-field { display: flex; align-items: center; gap: 5px; }

.tuning-lbl {
  font-size: 0.5rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  min-width: 22px;
  text-align: right;
}

.custom-head { display: flex; align-items: center; gap: 12px; }
.custom-head .ctrl-label { line-height: 1; }

.tuning-collapse-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.12s;
}
.tuning-collapse-btn:hover { border-color: var(--accent); color: var(--accent); }

.tuning-head-notes {
  color: var(--accent);
  margin-left: 8px;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.tuning-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.tuning-action-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.12s;
}
.tuning-action-btn:hover { border-color: var(--accent); color: var(--accent); }

.tuning-hint {
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #e8c547;
  display: none;
}

/* ── SITE BACK-LINK BAR ─────────────────────── */
.ft-top {
  width: 100%;
  max-width: 1520px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 2px 6px 10px;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}

.ft-back {
  color: var(--dim);
  text-decoration: none;
  transition: color 0.12s;
}
.ft-back:hover { color: var(--accent); }

.ft-attrib { opacity: 0.8; }