/* Scale Workshop - dark chrome, white paper. */
:root {
  --bg: #12141a;
  --panel: #191d25;
  --panel-2: #1f242e;
  --line: #2b313d;
  --text: #e7eaf0;
  --muted: #98a1b3;
  --accent: #8b7cf6;
  --accent-soft: #2a2540;
  --play: #ff7a18;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---- top bar -------------------------------------------------------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 20px; flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #1b1f28, #14171e);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--accent-soft); color: var(--accent);
  font-size: 20px; border: 1px solid #3a3160;
}
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.kofi {
  color: var(--muted); font-size: 12.5px; text-decoration: none;
  padding: 8px 10px; border-radius: 8px; white-space: nowrap;
}
.kofi:hover { color: var(--text); background: var(--panel-2); }
.topbar h1 { margin: 0; font: 600 17px/1.2 var(--serif); letter-spacing: .2px; }
.topbar p { margin: 2px 0 0; color: var(--muted); font-size: 12.5px; }

/* ---- layout --------------------------------------------------------- */
.app { display: grid; grid-template-columns: 310px minmax(0, 1fr); align-items: start; }
.panel {
  padding: 6px 16px 40px;
  border-right: 1px solid var(--line);
  background: var(--panel);
  position: sticky; top: 67px;
  max-height: calc(100vh - 67px);
  overflow-y: auto;
}
.output { padding: 18px 22px 60px; min-width: 0; }

/* ---- control groups -------------------------------------------------- */
.group { padding: 16px 0; border-bottom: 1px solid var(--line); }
.group:last-child { border-bottom: 0; }
.group h2 {
  margin: 0 0 12px; font-size: 11px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
}
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.field { display: block; margin-bottom: 10px; }
.field > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 5px; }
.field b { color: var(--text); font-variant-numeric: tabular-nums; }

select, input[type="range"] {
  width: 100%; font: inherit; color: var(--text);
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 8px;
}
select:focus-visible, input:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
input[type="range"] { padding: 0; height: 26px; accent-color: var(--accent); background: none; border: 0; }

.checks { display: flex; flex-direction: column; gap: 7px; margin-top: 4px; }
.check, .patterns label {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 13px; cursor: pointer;
}
input[type="checkbox"] { accent-color: var(--accent); margin-top: 2px; }

.group-actions { display: flex; gap: 12px; margin: -4px 0 10px; }
.link {
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--accent); font: inherit; font-size: 12px; text-decoration: underline;
}

.patterns { display: flex; flex-direction: column; gap: 2px; }
.patterns h3 {
  margin: 12px 0 4px; font-size: 11px; color: var(--muted);
  letter-spacing: .08em; text-transform: uppercase; font-weight: 600;
}
.patterns h3:first-child { margin-top: 0; }
.patterns label { padding: 4px 6px; border-radius: 6px; }
.patterns label:hover { background: var(--panel-2); }
.patterns small { display: block; color: var(--muted); font-size: 11.5px; }

.note { margin: 2px 0 0; color: var(--muted); font-size: 11.5px; line-height: 1.45; }
.note b { color: var(--text); font-weight: 600; }

.chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 2px; }
.chip {
  font: 12px/1 var(--mono); padding: 5px 7px; border-radius: 6px;
  background: var(--accent-soft); color: #c9c1ff; border: 1px solid #362e58;
}
.chip.tonic { background: #2b3a2c; color: #a9e0ad; border-color: #3b5540; }

/* ---- buttons -------------------------------------------------------- */
.btn {
  font: 500 13px/1 inherit; color: var(--text);
  background: var(--panel-2); border: 1px solid var(--line);
  padding: 9px 13px; border-radius: 8px; cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: #3f4757; background: #262c37; }
.btn:disabled { opacity: .45; cursor: default; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #14101f; font-weight: 650; }
.btn-primary:hover { background: #9d90f8; border-color: #9d90f8; }

.toolbar {
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  margin-bottom: 18px;
}
.summary { color: var(--muted); font-size: 12.5px; margin-left: auto; }

/* ---- sheets --------------------------------------------------------- */
.sheets { display: flex; flex-direction: column; gap: 18px; }
.sheet { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: 0 1px 0 #000, 0 10px 30px rgba(0,0,0,.35); }
.sheet-head {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  padding: 13px 18px 0;
}
.sheet-title { font: 600 16px/1.3 var(--serif); color: #16181d; margin: 0; }
.sheet-sub { color: #6b7280; font-size: 12px; }
.sheet-tools { margin-left: auto; display: flex; gap: 8px; }
.sheet-tools button {
  font: 500 11.5px/1 inherit; color: #4b5563; background: #f3f4f6;
  border: 1px solid #e5e7eb; border-radius: 6px; padding: 5px 8px; cursor: pointer;
}
.sheet-tools button:hover { background: #e9ebef; }
.sheet-body { padding: 4px 8px 10px; overflow-x: auto; }
.sheet svg { display: block; }
.vf-playing path, .vf-playing rect { fill: var(--play) !important; stroke: var(--play) !important; }

.empty { color: var(--muted); padding: 40px 4px; text-align: center; }
.hint { color: var(--muted); font-size: 12px; max-width: 60ch; margin-top: 22px; }
.error {
  background: #3a1d1d; border: 1px solid #5d2b2b; color: #ffd9d9;
  padding: 10px 12px; border-radius: 8px; font-size: 13px;
}

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .panel { position: static; max-height: none; border-right: 0; border-bottom: 1px solid var(--line); }
}

/* ---- print ---------------------------------------------------------- */
@media print {
  .topbar, .panel, .toolbar, .hint { display: none !important; }
  body { background: #fff; color: #000; }
  .app { display: block; }
  .output { padding: 0; }
  .sheets { gap: 0; }
  .sheet { box-shadow: none; border-radius: 0; break-inside: avoid; page-break-inside: avoid; margin-bottom: 18px; }
  .sheet-tools { display: none; }
}