:root {
  --ink: #1c1916;
  --muted: #5c564e;
  --line: #d9d2c6;
  --paper: #f7f4ee;
  --bench: #e7e1d6;
  --cut: #0f6b4c;
  --arc: #1d4e89;
  --hot: #c2410c;
  --bad: #9b1c1c;
  --warn: #a15c07;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  color: var(--ink);
  background: var(--bench);
  font: 15px/1.45 "Segoe UI", sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

button, textarea { font: inherit; }

.appnav {
  display: flex;
  gap: 4px;
  padding: 8px 22px 0;
  background: #fbfaf6;
  border-bottom: 1px solid var(--line);
}

.appnav a {
  text-decoration: none;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 8px 8px 0 0;
  font-size: 14px;
  font-weight: 600;
}

.appnav a:hover { color: var(--ink); background: #efeae2; }
.appnav a.active { color: var(--ink); background: #efeae2; border: 1px solid var(--line); border-bottom-color: #efeae2; }

.top {
  display: flex;
  gap: 28px;
  align-items: flex-end;
  padding: 16px 22px 12px;
  border-bottom: 1px solid var(--line);
  background: #fbfaf6;
}

.eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--hot);
}

h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0;
  max-width: 640px;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(360px, 440px) minmax(0, 1fr);
  flex: 1;
  min-height: 0;
}

.side, .stage {
  min-height: 0;
  overflow: auto;
}

.side { padding: 14px 14px 28px; }

.tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

button, .file {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  border-radius: 6px;
  padding: 7px 12px;
  cursor: pointer;
}

button.ghost, .file {
  background: transparent;
  color: var(--ink);
}

button:hover, .file:hover { border-color: var(--hot); color: var(--hot); }
button:hover { background: #fff; }
.tools button:first-child:hover { background: var(--hot); color: #fff; border-color: var(--hot); }

.file input { display: none; }

textarea {
  width: 100%;
  min-height: 240px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fffdf8;
  color: var(--ink);
  font: 13px/1.45 Consolas, "Courier New", monospace;
  tab-size: 2;
}

.hint { margin: 8px 0 10px; color: var(--muted); font-size: 13px; }

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
  margin: 0 0 10px;
  padding: 0 10px 10px;
}

.panel summary {
  cursor: pointer;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 10px 0 6px;
  font-weight: 650;
  list-style: none;
}

.panel summary::-webkit-details-marker { display: none; }

.toggles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 10px;
}

.toggles label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink);
  min-height: 26px;
}

.toggles input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--cut);
}

.toggles label.toolr {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

.toggles input[type="number"] {
  width: 96px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
  background: #fff;
}

.stage { background: #efeae2; border-left: 1px solid var(--line); }

.stage-bar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  background: rgba(251, 250, 246, 0.94);
  border-bottom: 1px solid var(--line);
}

#stats { color: var(--muted); font-size: 13px; }

.zoom { display: flex; gap: 6px; }
.zoom button { padding: 5px 10px; }

.sim-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  background: #fbfaf6;
}

.sim-bar button { padding: 5px 10px; min-width: 36px; }

.sim-speed {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.sim-speed select {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 6px;
  background: #fff;
}

#sim-scrub {
  flex: 1;
  min-width: 120px;
  accent-color: var(--hot);
}

#sim-info {
  font-size: 12px;
  color: var(--muted);
  min-width: 180px;
  font-family: Consolas, "Courier New", monospace;
}

#sheet {
  padding: 16px;
  transform-origin: 0 0;
}

#sheet svg { display: block; width: 100%; height: auto; }

.review, .warns, .aside, .moves { margin-top: 8px; }

h2 {
  margin: 16px 0 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.review li, .warns li, .aside li { margin: 0 0 6px; }

.warns li { color: var(--warn); }
.warns li.error { color: var(--bad); }

.move {
  border: 1px solid var(--line);
  background: #fffdf8;
  border-radius: 8px;
  padding: 8px 10px 10px;
  margin: 0 0 8px;
  cursor: pointer;
}

.move:hover, .move.hot { border-color: var(--hot); }

.move header {
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.badge {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border-radius: 11px;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.move .code {
  font: 13px/1.35 Consolas, "Courier New", monospace;
  word-break: break-all;
}

.move .sum { margin: 6px 0 0; }
.move ul { margin: 6px 0 0; padding-left: 18px; color: var(--muted); }
.move li { margin: 0 0 3px; }

.empty { color: var(--muted); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .top { flex-direction: column; align-items: flex-start; gap: 8px; }
  .stage { border-left: 0; border-top: 1px solid var(--line); min-height: 70vh; }
}