:root {
  --bg: #f6f6f4; --panel: #ffffff; --line: #e2e1dc; --text: #1d1d1b; --muted: #6d6c66;
  --accent: #c8402c; --accent-text: #fff; --warn: #a15c00; --err: #b3261e; --view: #ecebe7;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615; --panel: #1f1f1d; --line: #33332f; --text: #e8e7e2; --muted: #9a9890;
    --accent: #e0573f; --accent-text: #fff; --warn: #e2a33b; --err: #f28b82; --view: #232321;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  display: flex; background: var(--bg); color: var(--text);
  font: 14px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
#side {
  width: 320px; flex: none; display: flex; flex-direction: column;
  background: var(--panel); border-right: 1px solid var(--line);
}
#side header, #side footer { padding: 12px; }
#side header { border-bottom: 1px solid var(--line); }
#side footer { border-top: 1px solid var(--line); display: grid; gap: 10px; }
#model { width: 100%; font-weight: 600; }
#params { flex: 1; overflow-y: auto; padding: 4px 12px 12px; }
details.group { border-bottom: 1px solid var(--line); padding: 6px 0; }
details.group > summary {
  cursor: pointer; font-weight: 600; font-size: 12px; text-transform: uppercase;
  letter-spacing: .04em; color: var(--muted); padding: 4px 0;
}
.param { padding: 6px 0; }
.param .name { display: flex; justify-content: space-between; gap: 8px; font-family: ui-monospace, Menlo, monospace; font-size: 13px; }
.param .name .changed { color: var(--accent); }
.param .caption { color: var(--muted); font-size: 12px; margin: 2px 0 4px; }
.param .controls { display: flex; gap: 8px; align-items: center; }
.param input[type=range] { flex: 1; }
.param input[type=number], .param input[type=text], .param select { width: 100%; }
.param input[type=number].short { width: 90px; }
input, select, button, .button {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 5px 8px;
}
button, .button { cursor: pointer; text-decoration: none; white-space: nowrap; }
button:hover, .button:hover { border-color: var(--muted); }
.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.primary:hover { filter: brightness(1.08); border-color: var(--accent); }
.disabled { opacity: .45; pointer-events: none; }
.row { display: flex; gap: 8px; }
.row .primary { flex: 1; }
.check { display: flex; gap: 6px; align-items: center; color: var(--muted); }
main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
#view { flex: 1; min-height: 0; position: relative; background: var(--view); }
#view canvas { display: block; }
#bar {
  display: flex; gap: 8px; align-items: center; padding: 8px 12px;
  background: var(--panel); border-top: 1px solid var(--line);
}
#bar .grow { flex: 1; }
#status { font-variant-numeric: tabular-nums; }
#status .warn { color: var(--warn); }
#status .err { color: var(--err); }
#logbox { background: var(--panel); border-top: 1px solid var(--line); }
#logbox summary { cursor: pointer; padding: 6px 12px; color: var(--muted); font-size: 12px; }
#logbadge.warn { color: var(--warn); } #logbadge.err { color: var(--err); }
#log {
  margin: 0; padding: 0 12px 10px; max-height: 30vh; overflow: auto;
  font: 12px/1.45 ui-monospace, Menlo, monospace; white-space: pre-wrap;
}
#log .echo { color: var(--text); } #log .warn { color: var(--warn); } #log .err { color: var(--err); }
#log .dim { color: var(--muted); }
.spinner {
  display: inline-block; width: 10px; height: 10px; margin-right: 6px; vertical-align: -1px;
  border: 2px solid var(--muted); border-top-color: transparent; border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 720px) {
  body { flex-direction: column; }
  #side { width: auto; max-height: 45vh; border-right: 0; border-bottom: 1px solid var(--line); }
  #bar { flex-wrap: wrap; }
}