:root {
  /* 低亮度暖灰 · 参考 jsq 的红黑米白调 */
  --bg-1: #f8f4ef;
  --bg-2: #ece6e1;
  --surface: rgba(255,252,249,0.92);
  --surface-strong: #fffdfa;
  --surface-soft: #f8f2ee;
  --text: #1c1714;
  --text-2: #2d241f;
  --muted: #75675f;
  --muted-2: #a08f84;
  --border: #e0d5cd;
  --border-strong: #cdbdb2;
  --primary: #d61f1f;
  --primary-strong: #9f1111;
  --accent: #151515;
  --accent-deep: #9f1111;
  --accent-soft: rgba(214,31,31,0.08);
  --panel-span-width: 1040px;
  --bg: #ece6e1;
  --gold: #9a6b3e;
  --gold-deep: #75491e;
  --success: #0f766e;
  --danger: #dc2626;
  --viewer-dock-width: clamp(560px, 42vw, 760px);

  /* SVG 渲染器变量 - 沿用 jsq 原版红/酒红/棕褐 调性 */
  --wall-color: #1c1714;
  --label-color: #1c1714;
  --guide-color: #d61f1f;
  --guide-text-color: #d61f1f;
  --angle-color: #9a6b3e;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Segoe UI Variable Text','Microsoft YaHei UI','PingFang SC',sans-serif;
  font-feature-settings: 'tnum' 1, 'ss01' 1;
  color: var(--text);
  min-height: 100vh;
  padding: 20px 14px 30px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background:
    linear-gradient(rgba(214,31,31,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(214,31,31,0.035) 1px, transparent 1px),
    radial-gradient(circle at top, rgba(214,31,31,0.08), transparent 34%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 100%);
  background-size: 28px 28px, 28px 28px, auto, auto;
  background-attachment: fixed;
  transition: padding-right 0.28s ease, justify-content 0.28s ease;
}

.container {
  width: 100%;
  max-width: 1140px;
  background: rgba(255,252,249,0.95);
  border: 1px solid rgba(255,255,255,0.86);
  border-radius: 22px;
  box-shadow: 0 24px 60px rgba(46,29,20,0.12);
  overflow: hidden;
  padding-bottom: 16px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: max-width 0.28s ease, box-shadow 0.28s ease;
}

header {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 10px 12px 9px;
  background:
    radial-gradient(circle at top right, rgba(214,31,31,0.10), transparent 42%),
    linear-gradient(180deg, rgba(255,252,249,0.98) 0%, rgba(248,242,238,0.98) 100%);
  border-bottom: 1px solid #e4d8d0;
}
header::before {
  content:"";
  position:absolute; top:0; left:0; right:0; height:4px;
  background: linear-gradient(90deg, var(--primary) 0%, #f36b55 58%, #1c1714 100%);
}
.brand-side { display:flex; align-items:center; gap: 14px; }
.brand-mark {
  width: 38px; height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #334155 100%);
  display:flex; align-items:center; justify-content:center;
  color: var(--gold);
  font-weight: 900;
  font-size: 1.08rem;
  letter-spacing: 0.08em;
  box-shadow: 0 6px 14px rgba(15,23,42,0.22), inset 0 1px 0 rgba(255,255,255,0.18);
  font-family: 'Inter','HarmonyOS Sans SC',serif;
}
header h1 {
  margin: 0;
  font-size: 1.26rem;
  letter-spacing: 0.04em;
  font-weight: 800;
  color: var(--text);
  font-family: 'Bahnschrift SemiCondensed','Segoe UI Variable Display','Microsoft YaHei UI',sans-serif;
}
header p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}
.status-pill {
  display:inline-flex; align-items:center; gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(15,23,42,0.04);
  border: 1px solid var(--border);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-weight: 700;
  transition: all .25s ease;
}
.status-pill::before {
  content:""; width:6px; height:6px; border-radius:50%;
  background: var(--muted-2);
  box-shadow: 0 0 0 3px rgba(148,163,184,0.18);
}
.status-pill.ok {
  color: var(--accent-deep);
  background: var(--accent-soft);
  border-color: rgba(214,31,31,0.18);
}
.status-pill.ok::before {
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(214,31,31,0.14);
}

.content { padding: 16px 18px 18px; }

.filter-row,
.control-row,
.diagram-workbench,
#diamond-inputs,
.action-row,
.glass-input-row,
.result-area {
  width: 100%;
  max-width: var(--panel-span-width);
  margin-left: auto;
  margin-right: auto;
}

/* 通用表单 */
label {
  display: block;
  margin-bottom: 0;
  font-weight: 700;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  line-height: 1.25;
}
input, select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 11px;
  font-size: 0.89rem;
  font-family: inherit;
  background: rgba(255,255,255,0.96);
  color: var(--text);
  font-variant-numeric: tabular-nums;
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease, background .18s ease;
}
input:hover, select:hover { border-color: var(--border-strong); }
input:focus, select:focus {
  outline: none;
  border-color: rgba(11,101,127,0.62);
  box-shadow: 0 0 0 3px rgba(11,101,127,0.10);
  transform: translateY(-1px);
  background: #fff;
}

/* 三栏筛选 */
.filter-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}
.filter-row > .form-group {
  padding: 9px 10px 10px;
  background: rgba(255,255,255,0.72);
  border: 1px solid #dde6ee;
  border-radius: 15px;
  box-shadow: 0 8px 16px rgba(15,23,42,0.03);
}
@media (max-width: 720px) { .filter-row { grid-template-columns: 1fr; } }

/* 控制行 - 全部塞进同一个可包裹的 flex */
.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
  align-items: stretch;
}
.control-card {
  flex: 1 1 200px;
  min-width: 0;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 13px;
  padding: 9px 11px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.control-card:hover { border-color: var(--border-strong); }
.control-card--mode { flex: 2 1 360px; }
.control-card--direction { flex: 1.6 1 280px; }
.control-card--field { flex: 1 1 180px; }
.control-card-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin: 0;
}
.control-card--field input {
  margin-top: 0;
}
.control-card--enter {
  animation: cardIn .28s cubic-bezier(.34,1.56,.64,1) both;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateX(-8px) scale(0.96); }
  to   { opacity: 1; transform: translateX(0)    scale(1); }
}

/* 分段按钮（mode-selector / direction-selector） */
.mode-selector {
  display: flex;
  align-items: stretch;
  gap: 3px;
  background: rgba(238,243,247,0.92);
  border: 1px solid #d7e0e8;
  border-radius: 13px;
  padding: 3px;
  width: 100%;
  min-width: 0;
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.85);
}
.mode-btn {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 0;
  border: 1px solid transparent;
  background: transparent;
  padding: 7px 8px;
  color: #425262;
  border-radius: 9px;
  cursor: pointer;
  font-family: inherit;
  text-align: center;
  line-height: 1.2;
  min-height: 36px;
  overflow: hidden;
  box-shadow: none;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease;
}
.mode-btn:hover:not(.active) {
  background: rgba(255,255,255,0.72);
  border-color: #dde5ec;
}
.mode-btn.active {
  background: var(--surface-strong);
  color: var(--primary-strong);
  border-color: #d1dbe4;
  box-shadow: inset 0 -2px 0 var(--primary), 0 3px 8px rgba(15,23,42,0.04);
}
.mode-btn-title {
  display: block;
  font-size: 0.77rem;
  font-weight: 700;
  letter-spacing: 0.015em;
  font-family: 'Bahnschrift SemiBold','Segoe UI Variable Text','Microsoft YaHei UI',sans-serif;
}
.mode-btn-subtitle { display: none; }
.mode-btn--single { align-items: center; text-align: center; }
.mode-btn--single .mode-btn-subtitle:empty { display: none; }

/* 主图舞台 */
.diagram-stage {
  position: relative;
  width: 100%;
  height: 284px;
  background: linear-gradient(180deg, #ffffff 0%, #f5f8fb 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 0;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.92), 0 12px 24px rgba(15,23,42,0.045);
}
.diagram-stage::before,
.diagram-stage::after { display: none; }
#main-svg {
  width: 100%;
  height: 100%;
  display: block;
  background: transparent;
  border-radius: 0;
  position: relative;
  z-index: 1;
  transition: opacity .25s ease;
}
.diagram-stage.computing #main-svg { opacity: 0.45; }

/* 3D 渲染舞台 */
#three-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 16px;
  z-index: 2;
  cursor: grab;
}
#three-canvas:active { cursor: grabbing; }
.diagram-stage[data-view="3d"] #main-svg { display: none; }
.diagram-stage[data-view="2d"] #three-canvas { display: none; }
.diagram-stage[data-view="2d"] #three-labels { display: none; }
.three-labels {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  font-family: 'Bahnschrift SemiCondensed','Microsoft YaHei UI',sans-serif;
}
.three-label {
  position: absolute;
  transform: translate(-50%, -100%);
  color: #1f2937;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
  text-shadow:
     0 1px 0 rgba(255,255,255,0.95),
     0 -1px 0 rgba(255,255,255,0.95),
     1px 0 0 rgba(255,255,255,0.95),
    -1px 0 0 rgba(255,255,255,0.95);
}
.three-label-layer { position: absolute; overflow: hidden; pointer-events: none; }
.three-label-layer text { fill: #393633; font-weight: 650; letter-spacing: 0; }
.view-switcher {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(6px);
  color: #1f2937;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 4px 10px rgba(15,23,42,0.08);
  transition: background .18s, color .18s, transform .12s;
  font-family: 'Bahnschrift SemiCondensed','Segoe UI Variable Text','Microsoft YaHei UI',sans-serif;
}
.view-switcher:hover { background: #ffffff; transform: translateY(-1px); }
.view-switcher[data-view="3d"] {
  background: linear-gradient(180deg, #d61f1f 0%, #a81212 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 10px rgba(168,18,18,0.32);
}
.three-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9ca3af;
  font-size: 0.85rem;
  z-index: 4;
  pointer-events: none;
  font-family: 'Segoe UI Variable Text','Microsoft YaHei UI',sans-serif;
}
.three-hint {
  position: absolute;
  left: 12px;
  bottom: 10px;
  z-index: 3;
  background: rgba(15,23,42,0.55);
  color: #f8fafc;
  font-size: 0.7rem;
  padding: 3px 9px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  pointer-events: none;
  font-family: 'Bahnschrift','Segoe UI Variable Text',sans-serif;
}

/* SVG 右键菜单 */
.force-edit-menu {
  position: fixed; z-index: 1200;
  min-width: 132px; padding: 6px;
  border-radius: 14px; border: 1px solid rgba(209, 219, 228, 0.96);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.14);
  backdrop-filter: blur(10px);
  font-family: 'Segoe UI Variable Text','Microsoft YaHei UI',sans-serif;
}
.force-edit-menu[hidden] { display: none; }
.force-edit-menu__item {
  display: block; width: 100%; padding: 9px 10px;
  border: 0; border-radius: 10px;
  background: transparent; color: #1c1714;
  font-size: 0.82rem; font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.force-edit-menu__item:hover {
  background: rgba(214, 31, 31, 0.08);
  color: #9f1111;
}
.force-edit-menu__item--danger:hover {
  background: rgba(214, 31, 31, 0.14);
  color: #9f1111;
}

/* 自定义插入字段 */
.svg-custom-field {
  fill: #1c1714;
  font-size: 18px;
  font-weight: 800;
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  paint-order: stroke; stroke: #fff; stroke-width: 4px;
  cursor: grab;
  user-select: none;
}
.svg-custom-field.is-selected {
  fill: #d61f1f;
}
.svg-custom-field.is-dragging { cursor: grabbing; }
.svg-direction-label { cursor: grab; }
.svg-direction-label.is-dragging { cursor: grabbing; }

/* SVG 内部样式 - render.js 输出依赖这些 class */
.svg-wall { stroke: var(--wall-color); stroke-width: 4; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.svg-guide { stroke: var(--guide-color); stroke-width: 2.5; fill: none; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 4 2; opacity: .95; }
.svg-angle-arc { fill: none; stroke: var(--angle-color); stroke-width: 2; }
.svg-text, .svg-guide-text, .svg-angle-text {
  font-weight: 800;
  font-family: 'Inter','SF Mono',monospace;
  text-anchor: middle; dominant-baseline: middle;
  paint-order: stroke; stroke: #ffffff; stroke-width: 3.5px;
}
.svg-text { fill: var(--label-color); font-size: 17px; }
.svg-guide-text { fill: var(--guide-text-color); font-size: 17px; }
.svg-angle-text { fill: var(--angle-color); font-size: 18px; }
.svg-direction-label {
  fill: var(--guide-color);
  font-weight: 800; font-size: 22px;
  font-family: 'Inter','PingFang SC',sans-serif;
  paint-order: stroke; stroke: #fff; stroke-width: 4px;
}

/* 输入数据行 */
.input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.input-row > .form-group { flex: 1 1 0; }
@media (max-width: 600px) {
  .input-row { flex-wrap: wrap; }
  .input-row .form-group { flex: 1 1 45%; }
}

/* 操作按钮 */
.action-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
.btn-calc {
  width: 100%;
  padding: 10px 12px;
  background: linear-gradient(135deg, #0e728d 0%, #0a596f 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 0.91rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  margin-top: 4px;
  box-shadow: 0 12px 22px rgba(11,101,127,0.16);
}
.btn-calc:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 15px 28px rgba(11,101,127,0.20);
}
.btn-calc:disabled {
  background: #edf3f7;
  color: #788696;
  border: 1px dashed #c7d2dd;
  box-shadow: none;
  cursor: not-allowed;
}
.action-row .btn-calc { flex: 1; margin-top: 0; }

/* 结果区 */
.result-area {
  margin-top: 14px;
  padding: 16px 18px 14px;
  background:
    linear-gradient(180deg, rgba(214,31,31,0.025) 0%, rgba(214,31,31,0.008) 100%),
    var(--surface-strong);
  border: 1px solid rgba(214,31,31,0.10);
  border-radius: 16px;
  animation: fadeUp .35s ease both;
}
@keyframes fadeUp {
  from { opacity:0; transform: translateY(8px); }
  to   { opacity:1; transform: translateY(0); }
}
.result-title {
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-weight: 800;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.result-title b { color: var(--accent-deep); margin-left: 6px; }
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
}
.result-cell {
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 10px 12px;
  display: flex; flex-direction: column; gap: 3px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  animation: cardIn .32s cubic-bezier(.34,1.56,.64,1) both;
}
.result-cell:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 10px 22px -8px rgba(214,31,31,0.18);
}
.result-cell .k { font-size: 0.66rem; color: var(--muted); letter-spacing: 0.1em; text-transform: uppercase; font-weight: 700; }
.result-cell .v { font-size: 1.04rem; font-weight: 800; font-variant-numeric: tabular-nums; color: var(--text); }
.result-cell.glass { background: linear-gradient(180deg, #fffdfa 0%, rgba(214,31,31,0.025) 100%); }
.result-cell.glass .v { color: var(--accent-deep); }

.mid-post-preview-wrap {
  max-width: 820px;
  margin: 10px auto 12px;
  padding: 10px 12px 12px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255,255,255,0.82) 0%, rgba(248,250,252,0.58) 100%);
}
.mid-post-preview-title {
  text-align: center;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 800;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.mid-post-preview-title b { color: var(--accent-deep); margin-left: 5px; }
.mid-post-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(270px, 360px));
  justify-content: center;
  align-items: start;
  gap: 10px;
}
.mid-post-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 8px 10px;
  box-shadow: 0 6px 14px rgba(15,23,42,0.035);
}
.mid-post-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 5px;
}
.mid-post-card-head strong {
  font-size: 0.82rem;
  color: var(--text);
  letter-spacing: 0.02em;
}
.mid-post-card-head span {
  font-size: 0.7rem;
  color: var(--accent-deep);
  font-weight: 800;
  white-space: nowrap;
}
.mid-post-card svg {
  width: 100%;
  height: clamp(220px, 23vw, 270px);
  display: block;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  background: #ffffff;
}
.mid-post-card-meta {
  margin-top: 6px;
  text-align: center;
  font-size: 0.68rem;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.mid-post-preview-empty {
  text-align: center;
  padding: 8px 10px 2px;
  color: var(--muted);
  font-size: 0.76rem;
}
@media (max-width: 760px) {
  .mid-post-preview-wrap { max-width: 420px; padding: 9px; }
  .mid-post-preview-grid { grid-template-columns: minmax(0, 1fr); }
  .mid-post-card svg { height: 240px; }
}

.glass-input-row {
  display:grid;
  grid-template-columns: 240px 1fr;
  gap:12px;
  align-items:end;
  margin-bottom: 12px;
}
@media (max-width: 600px) { .glass-input-row { grid-template-columns: 1fr; } }
.placeholder-tip {
  text-align:center; padding: 16px 10px;
  color: var(--muted); font-size: 0.84rem;
  background: var(--surface-soft);
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
}

/* === 玻璃图（从 jsq 移植） === */
.glass-diagram-wrap {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.glass-diagram-title {
  text-align: center;
  font-weight: 800;
  font-size: 0.82rem;
  color: var(--accent-deep, #166534);
  letter-spacing: 0.03em;
  margin-bottom: 8px;
}
.glass-diagram-frame {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  overflow: hidden;
}
.glass-diagram-canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.err {
  margin: 6px 0; min-height: 16px;
  color: var(--danger); font-size: 0.8rem; font-weight: 600;
}
.err:empty { display:none; }

footer.foot {
  text-align: center;
  color: var(--muted-2);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  padding: 14px 18px 6px;
  text-transform: uppercase;
}

/* ====== 工作台双栏（主图 + 参考图） ====== */
.diagram-workbench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 312px;
  gap: 12px;
  align-items: stretch;
  margin: 14px auto 16px;
}
.diagram-workbench .diagram-stage { margin-bottom: 0; }
@media (max-width: 880px) {
  .diagram-workbench { grid-template-columns: 1fr; }
}

.reference-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

/* ====== 以下来自 jsq 原版 (reference + capture + snapshot-editor) ====== */
.reference-dropzone {
  flex: 1;
  min-height: 284px;
  height: 284px;
  border: 1px dashed #c9d5df;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(245,248,251,0.96) 100%);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; position: relative; cursor: pointer;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, height 0.3s ease, min-height 0.3s ease;
  outline: none;
}
.reference-dropzone:hover, .reference-dropzone:focus, .reference-dropzone.is-active {
  border-color: rgba(11,101,127,0.35);
  box-shadow: 0 0 0 3px rgba(11,101,127,0.08);
}
.reference-placeholder {
  width: 66px; height: 66px; border-radius: 18px;
  border: 2px dashed #d8e2ea;
  background: linear-gradient(135deg, rgba(214, 31, 31, 0.045) 0%, rgba(28, 23, 20, 0.035) 100%);
  position: relative;
}
.reference-placeholder::before, .reference-placeholder::after {
  content: ""; position: absolute; top: 50%; left: 50%;
  background: #c0ccd7; border-radius: 999px;
  transform: translate(-50%, -50%);
}
.reference-placeholder::before { width: 28px; height: 2px; }
.reference-placeholder::after { width: 2px; height: 28px; }
.reference-preview { width: 100%; height: 100%; object-fit: contain; background: #ffffff; }
.reference-actions { display: flex; gap: 8px; }
.reference-btn {
  flex: 1; padding: 9px 12px; border-radius: 12px; border: none;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff; font-size: 0.82rem; font-weight: 700; cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.22);
  font-family: inherit;
}
.reference-btn:hover { transform: translateY(-1px); box-shadow: 0 13px 24px rgba(15, 23, 42, 0.28); }
.reference-btn--ghost { background: #edf3f7; color: #516272; border: 1px solid #d1dbe4; box-shadow: none; }
.reference-btn--ghost:hover { box-shadow: none; }
.reference-status {
  min-height: 1.2em; font-size: 0.72rem; font-weight: 700; color: var(--muted);
}
.reference-status.success { color: #15803d; }
.reference-status.error { color: #b91c1c; }
.reference-dropzone.has-image, .reference-preview { cursor: zoom-in; }

.reference-viewer {
  position: fixed; top: 14px; right: 14px; bottom: 14px;
  width: var(--viewer-dock-width); z-index: 1000;
  display: flex; align-items: stretch; justify-content: flex-end;
}
.reference-viewer[hidden] { display: none; }
.reference-viewer__panel {
  position: relative; width: 100%; height: 100%;
  padding: 54px 8px 8px; border-radius: 24px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(219, 229, 238, 0.95);
  box-shadow: 0 26px 54px rgba(15, 23, 42, 0.22);
  overflow: hidden;
}
.reference-viewer__viewport {
  width: 100%; height: 100%; overflow: auto; border-radius: 16px;
  background: #ffffff; cursor: grab; touch-action: none; user-select: none;
  position: relative; scrollbar-width: none; -ms-overflow-style: none;
}
.reference-viewer__viewport::-webkit-scrollbar { width: 0; height: 0; }
.reference-viewer__viewport.is-dragging { cursor: grabbing; }
.reference-viewer__stage { position: relative; }
.reference-viewer__image {
  width: auto; height: auto; min-height: 0; max-width: none; max-height: none;
  display: block; background: #ffffff; border-radius: 14px;
  position: absolute; top: 0; left: 0; image-rendering: auto;
  backface-visibility: hidden; pointer-events: none; user-select: none; -webkit-user-drag: none;
}
.reference-viewer__close {
  position: absolute; top: 10px; right: 10px;
  width: 38px; height: 38px; border: none; border-radius: 999px;
  background: rgba(21, 21, 21, 0.82); color: #ffffff;
  font-size: 1.15rem; line-height: 1; cursor: pointer;
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.24);
}
.reference-viewer__close:hover { background: rgba(21, 21, 21, 0.94); }

/* 主图列容器：矢量图 + 截图工具条 垂直堆叠（与右侧参考图框对齐） */
.diagram-column {
  display: flex; flex-direction: column; gap: 8px; min-width: 0; min-height: 0;
}
.diagram-column .diagram-stage { margin-bottom: 0; }
.diagram-stage-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 54px;
}
.capture-host-stage {
  width: min(100%, 336px);
  margin-left: auto;
}
#capture-toolbar-staging { display: none; }

/* 截图按钮 + 工具条（参照 jsq） */
.capture-toolbar {
  display: grid;
  grid-template-columns: max-content max-content minmax(148px, 1fr);
  align-items: center;
  gap: 6px;
  width: 100%;
  margin: 0;
}
.capture-btn {
  width: auto; min-width: 0;
  border: none; border-radius: 12px; padding: 9px 14px;
  font-size: 0.85rem; font-weight: 800; cursor: pointer;
  letter-spacing: 0.04em;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  background: linear-gradient(135deg, #d61f1f 0%, #a81212 100%);
  color: #ffffff; box-shadow: 0 12px 22px rgba(168,18,18,0.18);
  font-family: inherit;
}
.capture-btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 15px 28px rgba(168,18,18,0.24); }
.capture-btn:disabled { opacity: 0.65; cursor: wait; transform: none; box-shadow: none; }
.capture-btn--edit {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  box-shadow: 0 12px 22px rgba(37,99,235,0.18);
}
.capture-btn--edit:hover:not(:disabled) { box-shadow: 0 15px 28px rgba(37,99,235,0.24); }
.capture-signature {
  display: grid; grid-template-columns: auto minmax(118px, 1fr);
  align-items: center; gap: 4px; min-width: 0; width: 100%;
}
.capture-signature label { white-space: nowrap; font-weight: 700; font-size: 0.68rem; color: var(--muted); margin: 0; }
.capture-signature input {
  width: 100%; min-width: 0; padding: 7px 8px;
  border-radius: 9px; border: 1px solid #d6dee6;
  font-size: 0.8rem; font-weight: 700; color: var(--text); background: #ffffff;
}
.capture-signature input:focus {
  outline: none; border-color: rgba(214, 31, 31, 0.32);
  box-shadow: 0 0 0 3px rgba(214, 31, 31, 0.12);
}
.capture-status {
  grid-column: 1 / -1; min-height: 1.15em; margin-top: 2px;
  font-size: 0.7rem; font-weight: 700; color: var(--muted);
  letter-spacing: 0.02em; text-align: left;
}
.capture-status.success { color: #15803d; }
.capture-status.error { color: #b91c1c; }

/* 截图编辑器 */
.snapshot-editor {
  position: fixed; inset: 0; z-index: 1200;
  display: flex; align-items: center; justify-content: center;
  padding: 0 0 12px;
  background: rgba(15, 23, 42, 0.42); backdrop-filter: blur(6px);
}
.snapshot-editor[hidden] { display: none; }
.snapshot-editor__panel {
  width: 100vw; height: clamp(560px, 72vh, 780px);
  display: grid; grid-template-rows: auto minmax(0, 1fr);
  gap: 10px; padding: 10px 12px 12px;
  border-radius: 0 0 20px 20px; background: #f8fafc;
  box-shadow: 0 32px 64px rgba(15, 23, 42, 0.28);
}
.snapshot-editor__toolbar { display: grid; gap: 10px; min-width: 0; }
.snapshot-editor__topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; min-width: 0; }
.snapshot-editor__heading { min-width: 0; display: flex; flex-direction: column; gap: 6px; padding-top: 2px; }
.snapshot-editor__title { color: #0f172a; font-size: 1rem; font-weight: 900; letter-spacing: 0.04em; }
.snapshot-editor__controls { display: flex; flex-wrap: wrap; align-items: stretch; gap: 10px; min-width: 0; }
.snapshot-editor__group {
  display: flex; flex-direction: column; gap: 8px; min-width: 0;
  padding: 10px 12px; border: 1px solid #dbe5ef; border-radius: 16px;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}
.snapshot-editor__group--tools { min-width: 212px; }
.snapshot-editor__group--palette { min-width: 168px; }
.snapshot-editor__group--zoom { min-width: 220px; }
.snapshot-editor__group--arrow { min-width: 220px; }
.snapshot-editor__group-label { color: #64748b; font-size: 0.72rem; font-weight: 900; letter-spacing: 0.08em; text-transform: uppercase; }
.snapshot-editor__range-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 10px; }
.snapshot-editor__range { width: 100%; accent-color: var(--accent); cursor: pointer; }
.snapshot-editor__range-value { min-width: 42px; text-align: right; color: #334155; font-size: 0.8rem; font-weight: 800; letter-spacing: 0.02em; }
.snapshot-editor__tools, .snapshot-editor__palette, .snapshot-editor__zoom, .snapshot-editor__actions {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
}
.snapshot-editor__actions { justify-content: flex-end; align-self: flex-start; }
.snapshot-editor__tool, .snapshot-editor__action {
  border: none; border-radius: 11px; padding: 8px 13px;
  font-size: 0.8rem; font-weight: 800; cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease, background-color 0.18s ease, color 0.18s ease;
  font-family: inherit;
}
.snapshot-editor__tool { background: #e2e8f0; color: #1e293b; }
.snapshot-editor__tool.is-active { background: var(--accent); color: #ffffff; box-shadow: 0 10px 20px rgba(214, 31, 31, 0.18); }
.snapshot-editor__action { background: #ffffff; color: #0f172a; box-shadow: 0 8px 16px rgba(15, 23, 42, 0.07); }
.snapshot-editor__action--primary { background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%); color: #ffffff; box-shadow: 0 10px 20px rgba(214, 31, 31, 0.18); }
.snapshot-editor__tool:hover, .snapshot-editor__action:hover { transform: translateY(-1px); }
.snapshot-editor__status { min-height: 1.1em; color: #64748b; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.02em; line-height: 1.45; }
.snapshot-editor__status.error { color: #b91c1c; }
.snapshot-editor__status.success { color: #15803d; }
.snapshot-editor__zoom-value { min-width: 56px; text-align: center; color: #475569; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.03em; }
.snapshot-editor__color {
  width: 24px; height: 24px; padding: 0;
  border-radius: 999px; border: 2px solid rgba(255,255,255,0.92);
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.45); cursor: pointer;
}
.snapshot-editor__color.is-active {
  transform: scale(1.08); box-shadow: 0 0 0 2px rgba(214, 31, 31, 0.34);
}
.snapshot-editor__viewport {
  min-width: 0; min-height: 0; overflow: auto;
  border-radius: 18px; border: 1px solid #dbe2ea;
  background: linear-gradient(180deg, #edf2f8 0%, #f8fafc 100%);
  padding: 8px;
}
.snapshot-editor__canvas-wrap { width: max-content; min-width: 100%; min-height: 100%; display: flex; align-items: center; justify-content: center; }
.snapshot-editor__canvas {
  display: block; max-width: none; max-height: none;
  border-radius: 16px; background: #ffffff;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.14);
  touch-action: none; cursor: crosshair;
}
.snapshot-editor__viewport.is-panning,
.snapshot-editor__viewport.is-panning .snapshot-editor__canvas { cursor: grabbing; }

body.reference-dock-open { justify-content: flex-start; padding-right: calc(var(--viewer-dock-width) + 14px); }
body.reference-dock-open .container { width: 100%; max-width: min(1140px, calc(100vw - var(--viewer-dock-width) - 24px)); }
body.reference-dock-open .diagram-workbench { grid-template-columns: 1fr; }
body.reference-dock-open .reference-panel { display: none; }
@media (max-width: 1180px) {
  :root { --viewer-dock-width: clamp(360px, 44vw, 520px); }
}