:root {
  --bg: #14171c;
  --panel: #191d24;
  --panel2: #1f242c;
  --line: #2b323c;
  --ink: #e6e9ee;
  --dim: #98a2b3;
  --faint: #6b7482;
  --accent: #e0b070;
  --warn: #e2705f;
  --ok: #6fb98f;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: grid;
  grid-template-columns: 344px 1fr;
  background: var(--bg);
  color: var(--ink);
  font: 13px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
}

/* ---- panel ---- */
#panel {
  display: flex; flex-direction: column; min-height: 0;
  background: var(--panel);
  border-right: 1px solid var(--line);
}
#panel header { padding: 16px 16px 12px; border-bottom: 1px solid var(--line); }
h1 { margin: 0; font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.sub { margin: 2px 0 10px; color: var(--dim); font-size: 12px; }
.row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
button {
  font: inherit; font-size: 12px; color: var(--ink); background: var(--panel2);
  border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; cursor: pointer;
}
button:hover { border-color: #3d4757; background: #262c36; }
button.primary { background: var(--accent); color: #221a0d; border-color: var(--accent); font-weight: 600; }
button.primary:hover { background: #edc084; }
.chk, .sel { display: inline-flex; align-items: center; gap: 5px; color: var(--dim); font-size: 12px; cursor: pointer; }
input[type=checkbox] { accent-color: var(--accent); margin: 0; }

#controls { overflow-y: auto; flex: 1; padding: 4px 0 20px; scrollbar-width: thin; scrollbar-color: #333b47 transparent; }
details { border-bottom: 1px solid var(--line); }
/* an author display: on the content beats the UA rule that hides it */
details:not([open]) > *:not(summary) { display: none !important; }
summary {
  padding: 10px 16px; cursor: pointer; font-weight: 600; font-size: 12px;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--dim);
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--faint); font-size: 14px; }
details[open] summary::after { content: '–'; }
details[open] summary { color: var(--ink); }
.gnote { margin: -4px 16px 8px; color: var(--faint); font-size: 11.5px; }

.p { padding: 5px 16px 9px; }
.p .top { display: flex; align-items: baseline; gap: 8px; }
.p label { flex: 1; color: var(--ink); font-size: 12.5px; }
.p .val { display: flex; align-items: baseline; gap: 3px; }
.p input[type=number] {
  width: 58px; text-align: right; font: inherit; font-size: 12px; font-variant-numeric: tabular-nums;
  color: var(--accent); background: transparent; border: 1px solid transparent; border-radius: 4px; padding: 1px 4px;
}
.p input[type=number]:hover { border-color: var(--line); }
.p input[type=number]:focus { border-color: var(--accent); outline: none; background: #0f1319; }
.p .unit { color: var(--faint); font-size: 11px; width: 18px; }
.p input[type=range] { width: 100%; margin: 3px 0 0; accent-color: var(--accent); height: 14px; }
.p .hint { color: var(--faint); font-size: 11px; line-height: 1.4; margin-top: 2px; }
body.nohints .hint { display: none; }
.p.boolean { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 2px 8px; }
.p.boolean label { flex: none; }
.p.boolean .hint { grid-column: 1 / -1; }

footer { border-top: 1px solid var(--line); padding: 10px 16px 12px; background: #161a20; }
#readoutBox { border-bottom: none; }
#readoutBox summary, #readoutBox[open] summary { padding: 0 0 6px; font-size: 10px; color: var(--faint); letter-spacing: .05em; }
#readoutBox summary:hover { color: var(--dim); }
#readoutBox summary::after { font-size: 12px; }
#readout { display: grid; grid-template-columns: 1fr auto; gap: 1px 10px; font-size: 11.5px; color: var(--dim); }
#readout b { color: var(--ink); font-weight: 500; font-variant-numeric: tabular-nums; }
#messages { margin-top: 10px; display: flex; flex-direction: column; gap: 5px; }
/* so a warning still announces itself with the readout shut */
#msgCount { margin-left: 6px; color: var(--dim); text-transform: none; letter-spacing: 0; }
#msgCount.warn { color: var(--warn); }
.msg { font-size: 11.5px; line-height: 1.4; padding: 6px 8px; border-radius: 5px; border-left: 2px solid; }
.msg.warn { background: #2a1b19; border-color: var(--warn); color: #f0b6ac; }
.msg.note { background: #1b2128; border-color: #3f4b5c; color: var(--dim); }

/* ---- viewport ---- */
main { position: relative; min-width: 0; }
#view { position: absolute; inset: 0; }
#view canvas { display: block; }
#toolbar {
  position: absolute; top: 12px; left: 12px; right: 12px;
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
  padding: 8px 12px; border-radius: 8px;
  background: rgba(20,23,28,.82); border: 1px solid var(--line); backdrop-filter: blur(8px);
}
#toolbar select { font: inherit; font-size: 12px; background: var(--panel2); color: var(--ink); border: 1px solid var(--line); border-radius: 5px; padding: 2px 4px; }
#toolbar .sep { width: 1px; height: 18px; background: var(--line); }
#status { margin-left: auto; color: var(--faint); font-size: 11.5px; font-variant-numeric: tabular-nums; }
#status.busy { color: var(--accent); }
#legend {
  position: absolute; left: 12px; bottom: 12px; display: flex; gap: 14px;
  font-size: 11px; color: var(--dim); background: rgba(20,23,28,.7); padding: 6px 10px;
  border: 1px solid var(--line); border-radius: 8px;
}
#legend i { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; border: 1px solid #4a5461; }

@media (max-width: 860px) {
  body { grid-template-columns: 1fr; grid-template-rows: 45vh 55vh; }
  #panel { border-right: none; border-bottom: 1px solid var(--line); }
}