:root{
  --ink:#1a2238;
  --ink-2:#232c47;
  --paper:#f7f4ec;
  --paper-2:#efeadd;
  --brass:#c8a04e;
  --brass-dk:#a9863a;
  --stave:#6b7280;
  --red:#b8433a;
  --line:#d8d2c2;
  --text:#20263a;
  --muted:#6c7185;
  --radius:10px;
  --shadow:0 1px 2px rgba(26,34,56,.06),0 8px 24px rgba(26,34,56,.08);
  --mono:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--paper);
  color:var(--text);
  display:flex;flex-direction:column;height:100vh;overflow:hidden;
}
h1,h2,h3{font-family:'Playfair Display',serif;margin:0}
.eyebrow{
  font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);font-weight:600;font-family:'Inter',sans-serif;margin:0 0 .55rem;
}

/* ---------- top bar ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:.7rem 1.1rem;background:var(--ink);color:var(--paper);
  border-bottom:2px solid var(--brass);flex-shrink:0;
}
.brand{display:flex;align-items:center;gap:.7rem}
.brand-mark{
  width:38px;height:38px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(145deg,var(--brass),var(--brass-dk));
  color:var(--ink);font-size:1.5rem;font-family:'Playfair Display',serif;font-weight:700;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35);
}
.brand-text h1{font-size:1.02rem;letter-spacing:.01em;line-height:1.1}
.brand-text span{font-size:.7rem;color:#b9bed0;letter-spacing:.03em}
.topbar-actions{display:flex;gap:.5rem}

/* ---------- buttons ---------- */
.btn{
  font:inherit;font-size:.82rem;font-weight:500;cursor:pointer;
  padding:.5rem .85rem;border-radius:8px;border:1px solid transparent;
  transition:.14s ease;white-space:nowrap;
}
.btn.primary{background:var(--brass);color:var(--ink);font-weight:600}
.btn.primary:hover{background:#d6b25f}
.btn.ghost{background:transparent;color:var(--paper);border-color:rgba(247,244,236,.28)}
.btn.ghost:hover{border-color:var(--brass);color:var(--brass)}
.btn.full{width:100%;justify-content:center}
.btn.round{
  width:40px;height:40px;padding:0;border-radius:50%;background:var(--ink);color:var(--paper);
  font-size:.9rem;display:grid;place-items:center;
}
.btn.round:hover{background:var(--brass);color:var(--ink)}

.chip{
  font:inherit;font-size:.76rem;font-weight:500;cursor:pointer;
  padding:.4rem .7rem;border-radius:20px;border:1px solid var(--line);
  background:var(--paper);color:var(--text);transition:.13s ease;
}
.chip:hover{border-color:var(--brass);color:var(--brass-dk)}
.chip.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.chip.danger:hover{border-color:var(--red);color:var(--red)}

/* ---------- workspace ---------- */
.workspace{
  flex:1;display:grid;grid-template-columns:220px 1fr 260px;
  gap:1px;background:var(--line);min-height:0;
}
.panel{background:var(--paper);overflow-y:auto;padding:1rem}
.tools{border-right:1px solid var(--line)}
.tool-group{margin-bottom:1.4rem}

.seg{display:flex;gap:2px;background:var(--paper-2);padding:3px;border-radius:9px}
.seg button{
  flex:1;font-size:1.15rem;padding:.35rem 0;border:none;background:transparent;
  border-radius:6px;cursor:pointer;color:var(--text);line-height:1;
}
.seg button.active{background:var(--ink);color:var(--paper)}

.toggle-row{display:flex;gap:.4rem;margin-top:.6rem}
.toggle-row.wrap{flex-wrap:wrap}
.hint{font-size:.72rem;color:var(--muted);line-height:1.5;margin:.8rem 0 0}

/* ---------- score ---------- */
.score-wrap{padding:0;display:flex;flex-direction:column;position:relative}
.transport{
  display:flex;align-items:center;gap:1rem;padding:.7rem 1rem;
  border-bottom:1px solid var(--line);background:var(--paper-2);flex-wrap:wrap;flex-shrink:0;
}
.metro{font-size:.78rem;display:flex;align-items:center;gap:.35rem;color:var(--muted)}
.timesig-bar{font-size:.78rem;display:flex;align-items:center;gap:.4rem;color:var(--muted)}
.timesig-bar select{
  font:inherit;font-size:.82rem;font-weight:600;font-family:var(--mono);
  padding:.25rem .45rem;border-radius:6px;border:1px solid var(--line);
  background:var(--paper);color:var(--ink);cursor:pointer;
}
.tempo{display:flex;align-items:center;gap:.5rem;font-size:.78rem;color:var(--muted)}
.tempo input[type=range]{accent-color:var(--brass)}
.tempo output{font-family:var(--mono);color:var(--ink);font-weight:500;min-width:2ch}
.loop{display:flex;align-items:center;gap:.6rem;margin-left:auto}
.speed{font-size:.75rem;color:var(--muted);display:flex;align-items:center;gap:.35rem}
.speed select{font:inherit;font-size:.75rem;padding:.2rem .4rem;border-radius:6px;border:1px solid var(--line);background:var(--paper)}

.alphatab{flex:1;overflow:auto;padding:1.2rem;background:
  repeating-linear-gradient(var(--paper),var(--paper) 39px,transparent 39px,transparent 40px);
}
.loading{
  position:absolute;inset:auto 0 0 0;top:56px;display:grid;place-items:center;
  background:var(--paper);color:var(--muted);font-size:.85rem;z-index:5;
}
.loading.hidden{display:none}

/* selection highlight / caret drawn over the score */
.sel-overlay{position:absolute;pointer-events:none;z-index:4}
.sel-overlay.box{
  background:rgba(200,160,78,.20);
  border:2px solid var(--brass);
  border-radius:5px;
  box-shadow:0 0 0 2px rgba(200,160,78,.15);
  transition:left .1s ease,top .1s ease,width .1s ease,height .1s ease;
}
.sel-overlay.caret{
  background:var(--brass);
  border-radius:2px;
  animation:caretBlink 1s step-end infinite;
}
@keyframes caretBlink{50%{opacity:.25}}

/* ---------- library ---------- */
.library{border-left:1px solid var(--line);padding:0}
.lib-tabs{display:flex;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--paper);z-index:2}
.lib-tab{
  flex:1;font:inherit;font-size:.76rem;font-weight:500;padding:.7rem 0;cursor:pointer;
  background:transparent;border:none;border-bottom:2px solid transparent;color:var(--muted);
}
.lib-tab.active{color:var(--ink);border-bottom-color:var(--brass)}
.lib-body{padding:1rem}
.chord-controls{display:flex;gap:.5rem;margin-bottom:1rem}
.chord-controls select{
  flex:1;font:inherit;font-size:.8rem;padding:.45rem;border-radius:7px;
  border:1px solid var(--line);background:var(--paper);
}
.chord-diagram,.scale-diagram{display:grid;place-items:center;margin-bottom:1rem}
.chord-suggest{margin-top:1rem;font-size:.75rem;color:var(--muted);line-height:1.6}
.chord-suggest b{color:var(--ink);font-weight:600}

.chip.strum.active{background:var(--red);color:var(--paper);border-color:var(--red)}

/* My Chords palette */
.my-chords{margin-top:1.4rem;border-top:1px solid var(--line);padding-top:1rem}
.my-chords-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}
.my-chords-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem;margin-top:.6rem}
.mychord{
  border:1px solid var(--line);border-radius:9px;padding:.4rem;cursor:pointer;
  background:var(--paper);transition:.13s;position:relative;text-align:center;
}
.mychord:hover{border-color:var(--brass);box-shadow:var(--shadow)}
.mychord svg{width:100%;height:auto;pointer-events:none}
.mychord .name{font-size:.72rem;font-weight:600;color:var(--ink);margin-top:.2rem}
.mychord .shape{font-size:.62rem;color:var(--muted)}
.mychord .del{
  position:absolute;top:2px;right:4px;font-size:.8rem;color:var(--muted);
  border:none;background:none;cursor:pointer;line-height:1;opacity:0;transition:.1s;
}
.mychord:hover .del{opacity:1}
.mychord .del:hover{color:var(--red)}

/* custom chord builder */
.builder-board{display:flex;flex-direction:column;gap:2px;margin:.6rem 0}
.builder-row{display:flex;align-items:center;gap:2px}
.builder-slabel{width:20px;font-family:var(--mono);font-size:.66rem;color:var(--muted);text-align:center;flex-shrink:0}
.builder-cell{
  flex:1;min-width:18px;height:20px;border-radius:4px;cursor:pointer;
  display:grid;place-items:center;font-family:var(--mono);font-size:.6rem;
  background:var(--paper-2);color:var(--muted);transition:.1s;
}
.builder-cell:hover{background:var(--brass);color:var(--ink)}
.builder-cell.on{background:var(--ink);color:var(--paper);font-weight:600}
.builder-cell.mute{background:var(--paper-2);color:var(--red)}
.builder-cell.mute.on{background:var(--red);color:var(--paper)}
.builder-name{
  width:100%;font:inherit;font-size:.82rem;padding:.5rem;margin:.5rem 0;
  border-radius:7px;border:1px solid var(--line);background:var(--paper);
}

.field{display:block;font-size:.74rem;color:var(--muted);margin-bottom:.8rem}
.field input,.field select{
  width:100%;font:inherit;font-size:.82rem;padding:.5rem;margin-top:.3rem;
  border-radius:7px;border:1px solid var(--line);background:var(--paper);color:var(--text);
}

/* ---------- fretboard ---------- */
/* mode switcher bar */
.modebar{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  background:var(--ink-2);border-bottom:1px solid rgba(200,160,78,.25);
  padding:.35rem .8rem;flex-shrink:0;flex-wrap:wrap;
}
.mode-tabs{display:flex;gap:.3rem}
.mode-tab{
  font:inherit;font-size:.8rem;font-weight:500;cursor:pointer;color:#c3c8db;
  background:transparent;border:1px solid transparent;border-radius:8px;padding:.4rem .8rem;transition:.13s;
}
.mode-tab:hover{color:var(--paper);background:rgba(247,244,236,.06)}
.mode-tab.active{background:var(--brass);color:var(--ink);font-weight:600}
.midi-controls{display:flex;align-items:center;gap:.55rem;flex-wrap:wrap}
.midi-status{font-family:var(--mono);font-size:.72rem;color:#9aa0b8}
.midi-status.on{color:#7bd88f}
.btn.small{font-size:.74rem;padding:.35rem .65rem}
.btn.rec.armed{background:var(--red);color:var(--paper);border-color:var(--red);animation:recPulse 1s infinite}
@keyframes recPulse{50%{opacity:.6}}
.quant{font-size:.74rem;color:#9aa0b8;display:flex;align-items:center;gap:.35rem}
.quant select{font:inherit;font-size:.74rem;padding:.2rem .35rem;border-radius:6px;border:1px solid var(--line);background:var(--paper)}
.clef-ctl{display:flex;align-items:center;gap:.55rem}
.clef-ctl[hidden],.clef-ctl label[hidden]{display:none !important}
.clef-ctl label{font-size:.72rem;color:#9aa0b8;display:flex;align-items:center;gap:.3rem}
.clef-ctl select{font:inherit;font-size:.74rem;padding:.2rem .35rem;border-radius:6px;border:1px solid var(--line);background:var(--paper)}
.chip.dyn{font-style:italic;font-weight:700;font-family:'Playfair Display',serif;min-width:34px}
.input-wrap.collapsed .input-panel{display:none !important}
.input-wrap.collapsed{max-height:none;padding-bottom:.5rem}
.hidden-panel{display:none !important}

/* input area (fretboard / piano / drums swap in here) */
.input-wrap{
  flex-shrink:0;background:var(--ink);color:var(--paper);padding:.6rem 1rem .9rem;
  border-top:2px solid var(--brass);max-height:220px;overflow:auto;
}
.input-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}
.input-head .eyebrow{color:#9aa0b8;margin:0}
.caret-info{font-family:var(--mono);font-size:.74rem;color:var(--brass)}
/* hidden attribute must win over the display rules below */
.input-panel[hidden]{display:none !important}

.fretboard{display:flex;flex-direction:column;gap:3px}
.fret-string{display:flex;align-items:center;gap:2px}
.string-label{
  width:26px;font-family:var(--mono);font-size:.72rem;color:#9aa0b8;text-align:center;flex-shrink:0;
}
.fret-cell{
  flex:1;min-width:24px;height:26px;border-radius:5px;cursor:pointer;
  display:grid;place-items:center;font-family:var(--mono);font-size:.7rem;
  background:rgba(247,244,236,.06);color:#c3c8db;transition:.1s;position:relative;
}
.fret-cell:hover{background:var(--brass);color:var(--ink);font-weight:600}
.fret-cell.marker::after{
  content:'';position:absolute;width:5px;height:5px;border-radius:50%;
  background:rgba(200,160,78,.4);bottom:2px;
}
.fret-nut{width:26px;flex:none;background:transparent;border-right:3px solid var(--brass);border-radius:0}
.fret-num{font-size:.62rem;color:#7a8099}

/* piano keyboard */
.piano{position:relative;height:130px;user-select:none;display:block}
.piano .keys{position:relative;height:100%;display:flex}
.piano .wkey{
  flex:1;background:linear-gradient(#fff,#f0ece0);border:1px solid #7a8099;border-radius:0 0 5px 5px;
  cursor:pointer;position:relative;transition:.05s;
}
.piano .wkey:active,.piano .wkey.lit{background:linear-gradient(var(--brass),#d6b25f)}
.piano .wkey .lbl{position:absolute;bottom:4px;width:100%;text-align:center;font-size:.56rem;color:#7a8099;font-family:var(--mono)}
.piano .bkeys{position:absolute;top:0;left:0;width:100%;height:62%;pointer-events:none}
.piano .bkey{
  position:absolute;width:3.2%;height:100%;background:linear-gradient(#333,#111);
  border-radius:0 0 4px 4px;cursor:pointer;pointer-events:auto;transform:translateX(-50%);
}
.piano .bkey:active,.piano .bkey.lit{background:linear-gradient(var(--brass-dk),var(--brass))}

/* drum pad */
.drumpad{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}
.drum-cell{
  background:rgba(247,244,236,.06);border:1px solid rgba(247,244,236,.15);border-radius:9px;
  padding:.7rem .5rem;cursor:pointer;text-align:center;color:#c3c8db;transition:.1s;
}
.drum-cell:hover,.drum-cell.lit{background:var(--brass);color:var(--ink);border-color:var(--brass)}
.drum-cell .dn{font-size:.82rem;font-weight:600;display:block}
.drum-cell .dk{font-size:.62rem;color:#9aa0b8;font-family:var(--mono)}
.drum-cell:hover .dk,.drum-cell.lit .dk{color:var(--ink)}

/* SVG chord/scale diagrams */
.diagram svg{background:var(--paper);border-radius:8px;border:1px solid var(--line)}

/* toast */
.toast{
  position:fixed;bottom:110px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:var(--paper);padding:.7rem 1.2rem;border-radius:10px;
  font-size:.82rem;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s;z-index:50;
  border-left:3px solid var(--brass);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* scrollbars */
.panel::-webkit-scrollbar,.alphatab::-webkit-scrollbar{width:9px;height:9px}
.panel::-webkit-scrollbar-thumb,.alphatab::-webkit-scrollbar-thumb{background:var(--line);border-radius:9px}

@media(max-width:1000px){
  .workspace{grid-template-columns:1fr}
  .tools,.library{display:none}
  .input-wrap{max-height:200px;overflow:auto}
}