:root {
  --bg: #1a1a1e;
  --fg: #d8d8dc;
  --muted: #888;
  --accent: #f0dc50;
  --panel: #222228;
  --border: #33333a;
  --ok: #60c070;
  --warn: #e0a040;
  --err: #d05050;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg);
  font: 13px/1.4 ui-monospace, SF Mono, Menlo, Consolas, monospace; }

header#header {
  display: flex; gap: 12px; align-items: center;
  padding: 8px 12px; border-bottom: 1px solid var(--border);
}
header#header button { cursor: pointer; }
header#header .kit-status { margin-left: auto; color: var(--muted); font-size: 12px; }
header#header input { background: var(--panel); color: var(--fg); border: 1px solid var(--border); padding: 4px 6px; font: inherit; }

#budget { padding: 6px 12px; border-bottom: 1px solid var(--border); }
.budget-meter { display: flex; gap: 12px; align-items: center; }
.budget-bar { flex: 1; height: 10px; background: var(--panel); border: 1px solid var(--border); border-radius: 2px; overflow: hidden; }
.budget-fill { height: 100%; background: var(--ok); width: 0%; transition: width 120ms ease; }
.budget-fill.warn { background: var(--warn); }
.budget-fill.over { background: var(--err); }
.budget-text { min-width: 110px; text-align: right; color: var(--muted); font-size: 12px; }

main { display: grid; grid-template-columns: 260px 1fr; gap: 12px; padding: 12px; height: calc(100vh - 80px); }

.slot-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px;
  align-content: start;
}
.slot-cell {
  background: var(--panel); border: 1px solid var(--border); border-radius: 2px;
  aspect-ratio: 1; display: flex; flex-direction: column; justify-content: center; align-items: center;
  cursor: pointer; user-select: none; transition: background 80ms, border 80ms;
}
.slot-cell .slot-index { font-size: 10px; color: var(--muted); }
.slot-cell .slot-name  { font-size: 14px; letter-spacing: 1px; }
.slot-cell.empty .slot-name { color: var(--muted); }
.slot-cell.selected { border-color: var(--accent); }
.slot-cell.drop-target { background: #2a2a40; border-color: var(--accent); }
.slot-cell.dragging { opacity: 0.4; }

.slot-panel { display: flex; flex-direction: column; min-height: 0; background: var(--panel); border: 1px solid var(--border); border-radius: 2px; padding: 10px; gap: 10px; }
.panel-header { display: flex; justify-content: space-between; align-items: baseline; }
.slot-label { font-weight: 600; letter-spacing: 1px; }
.status { color: var(--muted); font-size: 12px; }

.waveform { flex: 1; min-height: 200px; width: 100%; background: #111; border: 1px solid var(--border); border-radius: 2px; cursor: crosshair; }
.controls { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; }
.controls label { display: flex; gap: 6px; align-items: center; }
.controls input[type="text"], .controls select { background: #111; color: var(--fg); border: 1px solid var(--border); padding: 3px 6px; font: inherit; }
.controls input[type="range"] { width: 160px; }
.slider-row { display: flex; gap: 10px 16px; align-items: center; flex-wrap: wrap; flex-basis: 100%; }
#ctl-gain-val, #ctl-hp-val, #ctl-lp-val, #ctl-fade-val { min-width: 60px; color: var(--muted); display: inline-block; text-align: right; }

.eq-section { display: flex; flex-direction: column; gap: 8px; }
.eq-header { display: flex; justify-content: space-between; align-items: center; }
.eq-header label { display: flex; gap: 6px; align-items: center; cursor: pointer; }
.eq-hint { color: var(--muted); font-size: 11px; }
.eq-canvas { width: 100%; height: 100px; background: #111; border: 1px solid var(--border); border-radius: 2px; }
.eq-controls { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; }
.eq-controls label { display: flex; gap: 6px; align-items: center; }
.eq-controls input[type="range"] { width: 160px; }
#ctl-eq-freq-val, #ctl-eq-q-val, #ctl-eq-gain-val { min-width: 60px; color: var(--muted); display: inline-block; text-align: right; }

.transport { display: flex; gap: 8px; }
.transport button { background: var(--panel); color: var(--fg); border: 1px solid var(--border); padding: 4px 10px; cursor: pointer; font: inherit; }
.transport button:hover:not(:disabled) { border-color: var(--accent); }
.transport button:disabled { color: var(--muted); cursor: not-allowed; }
.transport button:last-child { margin-left: auto; }