:root {
  --bg: #14171c;
  --bg2: #1b1f26;
  --bg3: #232833;
  --line: #333a47;
  --fg: #dce1e8;
  --fg-dim: #8b95a5;
  --accent: #4ea1ff;
  --accent2: #2c6fbf;
  --ok: #59c98a;
  --warn: #e0b155;
  --err: #e06c6c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font: 13px/1.5 "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}

body { display: flex; flex-direction: column; overflow: hidden; }

.topbar {
  padding: 10px 16px;
  background: var(--bg2);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex: 0 0 auto;
}
.topbar h1 { font-size: 16px; margin: 0; font-weight: 600; }
.topbar .sub { color: var(--fg-dim); font-size: 12px; }

.layout { flex: 1 1 auto; display: flex; min-height: 0; }

.sidebar {
  width: 330px;
  flex: 0 0 330px;
  background: var(--bg2);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  padding: 10px;
}
.sidebar::-webkit-scrollbar, .main ::-webkit-scrollbar { width: 10px; height: 10px; }
.sidebar::-webkit-scrollbar-thumb, .main ::-webkit-scrollbar-thumb { background: #39414f; border-radius: 5px; }

.panel {
  background: var(--bg3);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px;
  margin-bottom: 10px;
}
.panel h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--fg-dim);
  margin: 0 0 8px;
  font-weight: 600;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 7px;
}
.row > span { color: var(--fg); flex: 1 1 auto; }
.row b { color: var(--accent); }
.row input[type="number"], .row select {
  width: 130px;
  flex: 0 0 130px;
  background: #12151a;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--fg);
  padding: 5px 7px;
  font: inherit;
}
.row input:focus, .row select:focus { outline: 1px solid var(--accent); border-color: var(--accent); }
.row.check { justify-content: flex-start; }
.row.check input { flex: 0 0 auto; width: auto; }
.row.check span { flex: 1 1 auto; }

.btnrow { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
button {
  background: var(--bg2);
  border: 1px solid var(--line);
  color: var(--fg);
  border-radius: 5px;
  padding: 6px 10px;
  cursor: pointer;
  font: inherit;
}
button:hover { border-color: var(--accent); color: #fff; }
button.primary { background: var(--accent2); border-color: var(--accent2); color: #fff; }
button.primary:hover { background: var(--accent); }
button.ghost { color: var(--fg-dim); }

.msgs { font-size: 12px; }
.msg { padding: 5px 7px; border-radius: 5px; margin-bottom: 5px; border-left: 3px solid; white-space: pre-wrap; }
.msg.err { background: rgba(224,108,108,.12); border-color: var(--err); color: #f0b6b6; }
.msg.warn { background: rgba(224,177,85,.12); border-color: var(--warn); color: #ecd39b; }
.msg.ok { background: rgba(89,201,138,.10); border-color: var(--ok); color: #a9e3c2; }
.msg.note { background: rgba(78,161,255,.10); border-color: var(--accent); color: #b7d7ff; }

table.kv { width: 100%; border-collapse: collapse; font-size: 12px; }
table.kv td { padding: 2px 0; vertical-align: top; }
table.kv td:first-child { color: var(--fg-dim); }
table.kv td:last-child { text-align: right; font-variant-numeric: tabular-nums; }

.help { font-size: 12px; color: var(--fg-dim); }
.help p { margin: 0 0 6px; }
details summary { cursor: pointer; color: var(--fg-dim); outline: none; }

.main { flex: 1 1 auto; display: flex; flex-direction: column; min-width: 0; min-height: 0; }

.tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  background: var(--bg2);
  flex: 0 0 auto;
}
.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--fg-dim);
  padding: 5px 12px;
  border-radius: 5px;
}
.tab.active { background: var(--bg3); border-color: var(--line); color: #fff; }
.tabs .spacer { flex: 1 1 auto; }
.mini {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--fg-dim);
  padding: 4px 10px;
  border-radius: 5px;
  font-size: 12px;
}
.mini:hover { color: #fff; border-color: var(--accent); }
.hint { color: var(--fg-dim); font-size: 12px; }

.stage { position: relative; flex: 1 1 auto; min-height: 0; background: #0f1216; }
.view { position: absolute; inset: 0; display: none; }
.view.active { display: block; }
.view canvas { display: block; width: 100%; height: 100%; cursor: crosshair; }
#threeHost { position: absolute; inset: 0; }
#threeHost canvas { display: block; cursor: grab; }
#threeHost canvas:active { cursor: grabbing; }
.overlay-note {
  position: absolute; left: 12px; bottom: 12px;
  color: var(--fg-dim); font-size: 12px;
  background: rgba(15,18,22,.7); padding: 4px 8px; border-radius: 5px;
  pointer-events: none;
}

.measurebar {
  display: flex;
  gap: 10px;
  padding: 7px 10px;
  border-top: 1px solid var(--line);
  background: var(--bg2);
  flex: 0 0 auto;
}
.measure {
  flex: 1 1 0;
  font-size: 12px;
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.measure b { color: var(--fg); }

/* ---------------- 海龟代码视图 ---------------- */
#viewTurtle { overflow: hidden; }
.turtleWrap {
  display: flex;
  height: 100%;
  min-height: 0;
}
.turtleCfg {
  flex: 0 0 300px;
  overflow-y: auto;
  padding: 10px;
  border-right: 1px solid var(--line);
  background: var(--bg2);
}
.turtleCfg h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--fg-dim);
  margin: 0 0 10px;
}
.turtleCfg .row { margin-bottom: 8px; }
.turtleCfg .row > span { font-size: 12px; }
.turtleCfg .row input[type="text"],
.turtleCfg .row input[type="number"],
.turtleCfg .row select {
  width: 150px;
  flex: 0 0 150px;
  background: #12151a;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--fg);
  padding: 5px 7px;
  font: inherit;
  font-size: 12px;
}
.turtleCfg .row input:focus, .turtleCfg .row select:focus {
  outline: 1px solid var(--accent); border-color: var(--accent);
}
.range2 { display: flex; align-items: center; gap: 4px; flex: 0 0 150px; width: 150px; }
.range2 input { width: 66px !important; flex: 0 0 66px !important; }
.range2 em { color: var(--fg-dim); font-style: normal; }

.turtleInfo { margin-top: 10px; font-size: 12px; }
.turtleInfo table { width: 100%; border-collapse: collapse; }
.turtleInfo td { padding: 2px 0; }
.turtleInfo td:first-child { color: var(--fg-dim); }
.turtleInfo td:last-child { text-align: right; font-variant-numeric: tabular-nums; }

.luaOut {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  padding: 12px 14px;
  overflow: auto;
  background: #0d1013;
  color: #c8d4e0;
  font: 12px/1.55 "Cascadia Mono", Consolas, "Courier New", monospace;
  white-space: pre;
  tab-size: 2;
}
.luaOut::-webkit-scrollbar { width: 10px; height: 10px; }
.luaOut::-webkit-scrollbar-thumb { background: #39414f; border-radius: 5px; }

.panel.ladder { margin: 10px; flex: 0 0 auto; max-height: 40%; overflow: auto; }
#ladder { font-size: 12px; overflow-x: auto; }
#ladder h3 { font-size: 12px; margin: 8px 0 4px; color: var(--fg-dim); font-weight: 600; }
.cells { display: flex; flex-wrap: wrap; gap: 3px; margin-bottom: 4px; }
.cell {
  width: 26px; height: 34px; border: 1px solid var(--line); border-radius: 4px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-size: 10px; background: #12151a;
}
.cell .n { font-size: 12px; font-weight: 700; }
.cell.zero { color: var(--fg-dim); }
.cell.one { color: #8fd0ff; border-color: #2f5f8f; background: #16283a; }
.cell.two { color: #ffd88f; border-color: #8f6a2f; background: #2e2515; }
.cell.hi { color: #ff9f9f; border-color: #8f3a3a; background: #2e1616; }
.cell.pad { border-style: dashed; color: var(--fg-dim); }

table.ladderTbl { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
table.ladderTbl th, table.ladderTbl td { padding: 3px 8px; border-bottom: 1px solid var(--line); text-align: right; }
table.ladderTbl th { color: var(--fg-dim); font-weight: 600; text-align: right; position: sticky; top: 0; background: var(--bg3); }
table.ladderTbl th:first-child, table.ladderTbl td:first-child { text-align: left; }
table.ladderTbl tr:nth-child(even) td { background: rgba(255,255,255,.02); }