:root {
  --bg: #111217;
  --bg2: #171920;
  --panel: #1c1f27;
  --line: #2c303b;
  --text: #ece6d9;
  --muted: #9b968b;
  --accent: #e2b25a;
  --accent-soft: rgba(226, 178, 90, 0.16);
  --warn: #e46f5f;

  --natural: #efe8da;
  --natural-on: #ffd27a;
  --natural-ink: #2a2620;
  --sharp: #2b5f66;
  --sharp-on: #4fb0b3;
  --flat: #57395a;
  --flat-on: #b072b0;
  --diesis: #6d5a35;
  --diesis-on: #caa154;
  --dark-ink: #eee6d6;

  --serif: "EB Garamond", Georgia, serif;
  --sans: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #1d2029 0%, var(--bg) 60%) no-repeat, var(--bg);
  color: var(--text);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

kbd {
  display: inline-block;
  font: 500 10.5px/1 var(--sans);
  padding: 3px 5px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  color: var(--muted);
  background: var(--bg2);
  vertical-align: 1px;
}
code { font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--accent); }

.masthead { text-align: center; padding: 34px 16px 10px; }
.masthead h1 {
  font: 600 clamp(32px, 5vw, 50px)/1.05 var(--serif);
  margin: 0;
  letter-spacing: 0.01em;
}

/* ---------------------------------------------------------------- controls */

.controls {
  max-width: 1180px;
  margin: 18px auto 0;
  padding: 12px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  justify-content: center;
  align-items: flex-end;
}
.group { display: flex; flex-direction: column; gap: 5px; }
.glabel { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); display: flex; gap: 4px; align-items: center; }
.glabel kbd { font-size: 9.5px; padding: 2px 4px; text-transform: none; letter-spacing: 0; }
.row { display: flex; gap: 6px; align-items: center; min-height: 34px; }

button, select, input[type="text"] {
  font: 500 13.5px var(--sans);
  color: var(--text);
  background: var(--panel);
  border: none;
  border-radius: 8px;
  height: 34px;
  padding: 0 12px;
}
button { cursor: pointer; display: inline-flex; align-items: center; gap: 7px; transition: border-color 0.15s, background 0.15s; }
button:hover:not(:disabled) { border-color: #464b59; }
button:focus-visible, select:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button:disabled { opacity: 0.35; cursor: default; }
button.icon { width: 34px; padding: 0; justify-content: center; font-size: 18px; }
button.toggle[aria-pressed="true"], button.active { background: var(--accent-soft); border-color: var(--accent); }
button.active { animation: pulse 1.2s ease-in-out infinite; }
select { padding-right: 6px; cursor: pointer; }
#keySelect { min-width: 76px; font-family: var(--serif); font-size: 17px; font-weight: 600; }
.readout { min-width: 34px; text-align: center; font: 600 17px var(--serif); }
#rootLabel { font-weight: 600; color: var(--accent); }

input[type="range"] { width: 120px; accent-color: var(--accent); }

button.denied { animation: deny 0.4s ease; border-color: var(--warn); }
@keyframes deny { 20%, 60% { transform: translateX(-3px); } 40%, 80% { transform: translateX(3px); } }
@keyframes pulse { 50% { box-shadow: 0 0 0 4px var(--accent-soft); } }

/* ------------------------------------------------------------------- grid */

.stage { max-width: 1180px; margin: 0 auto; padding: 8px 16px 0; position: relative; }
.banner {
  text-align: center;
  color: var(--accent);
  margin: 0 0 6px;
  font-size: 14px;
}
#grid {
  display: block;
  width: 100%;
  height: auto;
  max-height: 62vh;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
  font-family: var(--sans);
}

.cell { cursor: pointer; }
.cell .hex {
  fill: var(--fill);
  stroke: rgba(0, 0, 0, 0.35);
  stroke-width: 0.03;
  transition: fill 0.12s ease;
}
.cell[data-family="natural"] { --fill: var(--natural); --on: var(--natural-on); --ink: var(--natural-ink); }
.cell[data-family="sharp"] { --fill: var(--sharp); --on: var(--sharp-on); --ink: var(--dark-ink); }
.cell[data-family="flat"] { --fill: var(--flat); --on: var(--flat-on); --ink: var(--dark-ink); }
.cell[data-family="diesis"] { --fill: var(--diesis); --on: var(--diesis-on); --ink: var(--dark-ink); }
.cell:hover .hex { filter: brightness(1.08); }

.cell .ring { fill: none; stroke: none; }
.cell.root .ring { stroke: var(--accent); stroke-width: 0.075; }
.cell.root .hex { stroke: var(--accent); stroke-width: 0.06; }
.cell.tonic .ring { stroke: var(--accent); stroke-width: 0.035; stroke-dasharray: 0.09 0.07; opacity: 0.75; }

.cell text { text-anchor: middle; dominant-baseline: middle; fill: var(--ink); pointer-events: none; }
.cell .klabel { font-size: 0.27px; font-weight: 600; opacity: 0.55; }
.cell .ilabel { font-size: 0.22px; opacity: 0.5; letter-spacing: 0.01px; }
.cell .note { font: 600 0.5px var(--serif); }
#grid.nolabels .klabel, #grid.nolabels .ilabel { display: none; }
.cell.on .klabel, .cell.on .ilabel, .cell.bad .klabel, .cell.bad .ilabel { opacity: 0.3; }
.cell.on .note { transform: translateY(0.02px); }

.cell.on .hex { fill: var(--on); filter: url(#glow); }
.cell.on:not(.held) .hex { fill: color-mix(in srgb, var(--on) 70%, var(--fill)); }
.cell.on[data-family="natural"] .note { fill: #3a2a08; }
.cell.on:not([data-family="natural"]) text { fill: #fffaf0; }
.cell.bad .hex { fill: color-mix(in srgb, var(--warn) 55%, var(--fill)); }
.cell.bad .note { fill: #fff; font-family: var(--sans); font-size: 0.42px; }

#grid.picking .cell .hex { animation: pick 1.1s ease-in-out infinite; }
@keyframes pick { 50% { filter: brightness(1.25); } }

/* ---------------------------------------------------------------- sounding */

.sounding { min-height: 92px; padding: 10px 0 4px; text-align: center; }
.sounding .idle { color: var(--muted); margin: 14px 0; font-size: 14px; }
.chips { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; padding: 0; margin: 6px 0; }
.chips li {
  display: flex; align-items: baseline; gap: 10px;
  background: var(--panel); border-radius: 999px; padding: 5px 14px;
  font-size: 12.5px; color: var(--muted);
}
.chips li.sus { border-width: 2px; border-style: dashed; }
.chips b { font: 600 19px var(--serif); color: var(--text); }
.last { margin: 8px 0 0; color: var(--muted); font-size: 14px; }
.last b { font: 600 18px var(--serif); color: var(--text); }
.warn { color: var(--warn); font-weight: 600; }

/* ------------------------------------------------------------------ panels */

.panel {
  max-width: 1180px;
  margin: 28px auto;
  padding: 22px 24px;
  background: var(--bg2);
  border-radius: 16px;
}
.panel h2 { font: 600 28px/1.1 var(--serif); margin: 0; }
.panel h3 { font: 600 20px var(--serif); margin: 0 0 6px; color: var(--accent); }
.panel .sub { margin: 4px 0 0; color: var(--muted); font-size: 13.5px; }
.panel-head { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: flex-start; }
.panel-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.addform { display: flex; gap: 6px; }
.addform input { width: 180px; }
.message { min-height: 1.4em; margin: 10px 0 4px; color: var(--accent); font-size: 13.5px; word-break: break-all; }

.resolution { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: 4px 0 14px; }
.resolution label { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }

.ivtable { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 6px 22px; }
.ivrow { display: flex; gap: 12px; align-items: flex-start; padding: 7px 0; border-top: 1px solid var(--line); }
.ivk { width: 46px; flex: none; display: flex; flex-direction: column; line-height: 1.2; padding-top: 4px; }
.ivk b { font: 600 15px var(--sans); }
.ivk span { font-size: 11px; color: var(--muted); }
.ivlist { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.ivlist .none { color: var(--muted); font-size: 12.5px; font-style: italic; padding-top: 6px; }
.ivchip {
  display: flex; align-items: center; gap: 2px;
  background: var(--panel); border-radius: 8px; padding: 2px 3px;
}
.ivchip:first-child { border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--line)); }
.ivchip .ratio { font: 600 16px var(--serif); padding: 0 4px; }
.ivchip .meta { font-size: 11px; color: var(--muted); padding-right: 4px; white-space: nowrap; }
.ivchip .meta i { font-style: normal; opacity: 0.7; }
.ivchip button { height: 24px; width: 22px; padding: 0; justify-content: center; border: none; background: transparent; color: var(--muted); font-size: 15px; }
.ivchip button:hover:not(:disabled) { color: var(--text); background: var(--line); }
.ivchip .rm:hover { color: var(--warn) !important; }

.synopsis .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 8px 32px; margin-top: 14px; }
.synopsis p { margin: 0 0 10px; color: #cfc9bc; font-size: 14.5px; }
.synopsis .foot { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13.5px; }

@media (max-width: 640px) {
  .controls { gap: 12px 14px; padding: 8px 16px; }
  input[type="range"] { width: 100px; }
  .panel { margin: 20px 12px; padding: 18px 16px; }
  .ivtable { grid-template-columns: 1fr; }
  .addform input { width: 150px; }
}