:root {
  --bg: #070a0f;
  --panel: #0d131c;
  --panel-2: #111926;
  --line: #1d2836;
  --text: #dbe6f2;
  --muted: #7d8fa6;
  --accent: #58c4ff;
  --accent-dim: #1c4b66;
  --danger: #e0645a;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  overflow: hidden;
}

button { font-family: inherit; cursor: pointer; }

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---------------- 顶栏 ---------------- */
#topbar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 18px;
  background: linear-gradient(180deg, #0d141d, #0a0f16);
  border-bottom: 1px solid var(--line);
  flex: 0 0 auto;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }

.logo {
  width: 30px; height: 30px; flex: 0 0 auto;
  border-radius: 9px;
  background:
    radial-gradient(circle at 30% 30%, #7ee0ff 0%, #2a7fc4 42%, #123a63 100%);
  box-shadow: 0 0 16px rgba(88, 196, 255, 0.45), inset 0 0 8px rgba(255,255,255,0.25);
}

.brand-text h1 {
  margin: 0;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.3px;
}
.brand-text p {
  margin: 1px 0 0;
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
}

.chips { display: flex; gap: 6px; }
.chips.small { gap: 4px; }

.chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #0f1620;
  color: var(--muted);
  font-size: 12.5px;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.chip b { font-size: 13.5px; color: #9fc6ea; font-weight: 700; }
.chip:hover { border-color: #2b3c50; color: var(--text); }
.chip.active {
  background: linear-gradient(180deg, #163a52, #12283a);
  border-color: #2f7dab;
  color: #e6f6ff;
  box-shadow: 0 0 14px rgba(88, 196, 255, 0.18);
}
.chip.active b { color: #7ee0ff; }
.chips.small .chip { padding: 6px 11px; font-size: 12px; }
.chips.small .chip.active {
  background: #14324a; border-color: #2a6d95; color: #dff2ff; box-shadow: none;
}
.chip:disabled { opacity: 0.28; cursor: not-allowed; }

.topbar-actions { margin-left: auto; display: flex; gap: 8px; }

.ghost {
  padding: 7px 12px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: #0f1620;
  color: var(--muted);
  font-size: 12.5px;
  transition: all 0.15s;
}
.ghost:hover { color: var(--text); border-color: #2b3c50; }
.ghost.active { color: #bfe9ff; border-color: #2f7dab; background: #12283a; }
.ghost.danger:hover { color: #ffb3ad; border-color: #5a2b28; }

/* ---------------- 主区 ---------------- */
#workspace {
  flex: 1 1 auto;
  display: flex;
  min-height: 0;
}

#editorPane {
  width: 36%;
  max-width: 560px;
  min-width: 320px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-height: 0;
  transition: margin-left 0.25s ease;
}
#editorPane.hidden { display: none; }

.pane-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px 8px;
}
.pane-title { font-size: 13px; font-weight: 600; color: #c8d8ea; }
.pane-hint { font-size: 11px; color: #55677c; }

.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 14px 10px;
}
.tool {
  padding: 6px 11px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #0f1620;
  color: var(--muted);
  font-size: 12px;
  transition: all 0.13s;
}
.tool:hover { color: var(--text); border-color: #2b3c50; }
.tool.active {
  color: #0a1017;
  background: linear-gradient(180deg, #9fe4ff, #58c4ff);
  border-color: #58c4ff;
  font-weight: 600;
}

.canvas-wrap {
  flex: 1 1 auto;
  min-height: 0;
  margin: 0 12px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 45%, #0f1722 0%, #0a0f17 70%);
  overflow: hidden;
  position: relative;
}
#editorCanvas { display: block; touch-action: none; }

.inspector {
  padding: 10px 16px;
  min-height: 74px;
  border-top: 1px solid var(--line);
  margin-top: 10px;
}
.inspector .empty { color: #4d5d71; font-size: 12px; }

.insp-row { display: flex; align-items: center; gap: 10px; margin-bottom: 7px; }
.insp-name { font-size: 12.5px; color: #c8d8ea; font-weight: 600; min-width: 74px; }
.insp-val { font-variant-numeric: tabular-nums; color: #7ee0ff; font-size: 12.5px; min-width: 74px; text-align: right; }
.insp-row input[type=range] { flex: 1 1 auto; }

.pane-foot {
  display: flex;
  gap: 8px;
  padding: 0 16px 14px;
}

#viewport { flex: 1 1 auto; position: relative; min-width: 0; }
#three-container { position: absolute; inset: 0; }
#three-container canvas { display: block; }

/* ---------------- 叠加层 ---------------- */
.overlay {
  position: absolute;
  background: rgba(9, 14, 21, 0.82);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  z-index: 5;
}

.legend { left: 16px; bottom: 16px; padding: 10px 12px; width: 190px; }
.legend-title { font-size: 11.5px; color: #9fc6ea; margin-bottom: 7px; letter-spacing: 0.4px; }
.legend-bar { height: 9px; border-radius: 5px; }
.legend-scale { display: flex; justify-content: space-between; font-size: 10.5px; color: #64768b; margin-top: 5px; }

.stats {
  right: 16px; bottom: 16px;
  padding: 8px 12px;
  font-size: 11px;
  color: #7d8fa6;
  font-variant-numeric: tabular-nums;
  line-height: 1.6;
  text-align: right;
}
.stats b { color: #9fc6ea; font-weight: 600; }

.controls {
  right: 16px; top: 16px;
  padding: 12px 14px;
  width: 214px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.ctl { display: flex; flex-direction: column; gap: 5px; }
.ctl-label { font-size: 11.5px; color: #7d8fa6; }
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: #22303f;
  border-radius: 2px;
  outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: #58c4ff;
  border: 2px solid #0b121a;
  box-shadow: 0 0 8px rgba(88,196,255,0.6);
  cursor: pointer;
}

.slice-only { display: none; flex-direction: column; gap: 8px; }
.slice-only.on { display: flex; }

.seg { display: flex; gap: 3px; background: #0c141d; padding: 3px; border-radius: 8px; border: 1px solid var(--line); }
.seg button {
  flex: 1;
  padding: 4px 0;
  border: none;
  background: transparent;
  color: #6a7d92;
  border-radius: 6px;
  font-size: 11.5px;
}
.seg button.active { background: #1b3d56; color: #bfe9ff; }

.switch { display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: #7d8fa6; cursor: pointer; }
.switch input { accent-color: #58c4ff; width: 13px; height: 13px; cursor: pointer; }

.legend-hint {
  left: 50%;
  transform: translateX(-50%);
  bottom: 16px;
  padding: 6px 14px;
  font-size: 11.5px;
  color: #8fa6bd;
  white-space: nowrap;
  border-radius: 999px;
  pointer-events: none;
}

/* ---------------- 弹窗 ---------------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 10, 0.72);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal.hidden { display: none; }
.modal-card {
  position: relative;
  width: min(680px, 90vw);
  max-height: 84vh;
  overflow: auto;
  background: var(--panel-2);
  border: 1px solid #22303f;
  border-radius: 16px;
  padding: 26px 30px 28px;
  line-height: 1.72;
  font-size: 13px;
  color: #c4d4e4;
  box-shadow: 0 24px 60px rgba(0,0,0,0.6);
}
.modal-card h2 { margin: 0 0 14px; font-size: 17px; color: #e8f4ff; font-weight: 650; }
.modal-card h3 { margin: 18px 0 6px; font-size: 13.5px; color: #9fc6ea; font-weight: 600; }
.modal-card p { margin: 8px 0; }
.modal-card ul { margin: 6px 0; padding-left: 20px; }
.modal-card li { margin: 4px 0; }
.modal-card b { color: #d9ecff; }
.modal-card em { color: #ffd479; font-style: normal; }
.modal-close {
  position: absolute;
  top: 14px; right: 16px;
  width: 28px; height: 28px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #0f1620;
  color: #7d8fa6;
  font-size: 16px;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }

@media (max-width: 980px) {
  #workspace { flex-direction: column; }
  #editorPane { width: 100%; max-width: none; height: 42%; border-right: none; border-bottom: 1px solid var(--line); }
  .controls { width: 178px; padding: 10px; }
  .legend { width: 150px; }
}

/* ---------------- 剖面分析卡片 ---------------- */
.analysis {
  right: 16px;
  bottom: 132px;
  width: 234px;
  padding: 10px 12px 12px;
}
.analysis.hidden { display: none; }
.an-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  color: #9fc6ea;
  margin-bottom: 8px;
}
.an-cycle {
  padding: 3px 9px;
  font-size: 10.5px;
  border-radius: 7px;
  border: 1px solid var(--line);
  background: #0f1620;
  color: #7d8fa6;
}
.an-cycle:hover { color: var(--text); border-color: #2b3c50; }
.analysis canvas {
  width: 210px;
  height: 210px;
  border-radius: 8px;
  display: block;
  border: 1px solid #1a2432;
}
.an-legend { font-size: 9.5px; color: #4f6274; text-align: right; margin: 3px 0 6px; }
.an-info { font-size: 10.5px; color: #8ba0b8; line-height: 1.6; }
.an-info b { color: #cfe6ff; }
.an-stats {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid #18222f;
  font-size: 10.5px;
  line-height: 1.65;
  color: #7d8fa6;
  font-variant-numeric: tabular-nums;
}
.an-stats b { color: #7ee0ff; font-weight: 600; }

/* ---------------- 版本号 ---------------- */
.version {
  position: absolute;
  right: 14px;
  bottom: 2px;
  font-size: 10px;
  letter-spacing: 0.4px;
  color: #3f5064;
  z-index: 6;
  pointer-events: none;
  font-variant-numeric: tabular-nums;
}
#viewport .stats { bottom: 20px; }

/* ---------------- 截面窗口 ---------------- */
.slicewin {
  left: 16px;
  top: 16px;
  width: 366px;
  padding: 0 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: calc(100% - 32px);
  overflow: auto;
}
.slicewin.hidden { display: none; }
.sw-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 2px 7px;
  cursor: move;
  border-bottom: 1px solid #16202c;
  user-select: none;
}
.sw-title { font-size: 11.5px; color: #7d8fa6; }
.sw-title b { color: #9fc6ea; font-weight: 600; }
.sw-btns { display: flex; gap: 5px; }
.sw-btns button {
  padding: 3px 9px; font-size: 10.5px; border-radius: 7px;
  border: 1px solid var(--line); background: #0f1620; color: #7d8fa6;
}
.sw-btns button:hover { color: #bfe9ff; border-color: #2f7dab; }
.sw-canvas { position: relative; border-radius: 9px; overflow: hidden; background: #05080c; }
.sw-canvas canvas { display: block; width: 100%; height: auto; aspect-ratio: 1 / 1; }
.sw-res {
  position: absolute; right: 7px; top: 6px;
  font-size: 9.5px; color: rgba(220,235,250,0.55);
  background: rgba(4,8,12,0.55); padding: 1px 6px; border-radius: 6px;
}
.sw-progress-wrap {
  position: absolute; left: 0; right: 0; bottom: 0; height: 3px;
  background: rgba(255,255,255,0.08);
}
.sw-progress-wrap.hidden { display: none; }
.sw-progress { height: 100%; width: 0; background: #58c4ff; transition: width 0.05s linear; }
.sw-legend { display: flex; flex-direction: column; gap: 3px; }
.sw-bar { height: 8px; border-radius: 5px; background: #16202c; }
.sw-scale { display: flex; justify-content: space-between; font-size: 9.5px; color: #64768b; }
.sw-unit { font-size: 9.5px; color: #47586c; text-align: right; }
.sw-ctl { display: flex; flex-direction: column; gap: 7px; }
.sw-ctl label { display: flex; flex-direction: column; gap: 3px; font-size: 10.5px; color: #7d8fa6; }
.sw-ctl label > span { display: flex; justify-content: space-between; }
.sw-ctl i { color: #9fc6ea; font-style: normal; font-variant-numeric: tabular-nums; }
.sw-foot { display: flex; gap: 6px; align-items: center; }
.sw-foot .seg { flex: 0 0 96px; }
.sw-foot select {
  flex: 1 1 auto; padding: 4px 6px; font-size: 10.5px;
  background: #0c141d; color: #9fc6ea; border: 1px solid var(--line); border-radius: 7px;
}
.sw-foot .ghost { padding: 4px 8px; font-size: 10.5px; }
.sw-probe {
  min-height: 15px;
  font-size: 10px;
  color: #6f8298;
  font-variant-numeric: tabular-nums;
}

/* 空间（体积）窗口：默认摆在截面窗口右边，可拖动 */
.volwin { left: 400px; }
.volwin .sw-canvas canvas { background: #04070b; }