:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #f0f3f7;
  --border: #d9dfe8;
  --text: #1c2733;
  --text-muted: #5b6b7b;
  --primary: #1769aa;
  --primary-dark: #0f4f82;
  --accent: #e8730c;
  --shadow: 0 1px 3px rgba(20, 40, 70, 0.08), 0 6px 18px rgba(20, 40, 70, 0.06);
  --radius: 10px;
}

[data-theme="dark"] {
  --bg: #141a21;
  --surface: #1c2530;
  --surface-2: #232e3a;
  --border: #2e3a47;
  --text: #e6edf3;
  --text-muted: #9aa7b4;
  --primary: #4ea1e0;
  --primary-dark: #2b7fc0;
  --accent: #ff8c2b;
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK", sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

/* ---------- Top bar ---------- */
.topbar {
  background: linear-gradient(135deg, #1769aa 0%, #0f4f82 100%);
  color: #fff;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  font-size: 28px; color: #ffd27a; line-height: 1;
}
.brand-text h1 { margin: 0; font-size: 19px; font-weight: 700; letter-spacing: .2px; }
.subtitle { margin: 2px 0 0; font-size: 12.5px; opacity: .8; }

.topbar-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 14px; border-radius: 8px; font-size: 13.5px; font-weight: 600;
  text-decoration: none; cursor: pointer; border: 1px solid transparent;
  transition: background .15s, border-color .15s, transform .05s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: #fff; color: var(--primary-dark); }
.btn-primary:hover { background: #eaf2fa; }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.22); }
.btn.active { background: var(--primary-dark); color: #fff; border-color: var(--primary-dark); }
.btn.active:hover { background: var(--primary-dark); }

.lang-select { display: flex; flex-direction: column; font-size: 11px; opacity: .9; }
.lang-select span { margin-bottom: 2px; }
#langSelect {
  background: #fff; color: var(--text); border: 1px solid rgba(255,255,255,.4);
  border-radius: 7px; padding: 5px 8px; font-size: 13px; cursor: pointer; min-width: 110px;
}

/* ---------- Tabs ---------- */
.tabs {
  max-width: 1200px; margin: 18px auto 0; padding: 0 20px;
  display: flex; gap: 6px; border-bottom: 2px solid var(--border);
}
.tab {
  background: none; border: none; padding: 10px 18px; font-size: 14.5px; font-weight: 600;
  color: var(--text-muted); cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -2px;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* ---------- Main / views ---------- */
main { max-width: 1200px; margin: 0 auto; padding: 22px 20px 40px; }
.view[hidden] { display: none; }

/* ---------- Controls ---------- */
.controls {
  display: flex; gap: 14px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 20px;
}
.control { display: flex; flex-direction: column; gap: 5px; }
.control label { font-size: 12.5px; color: var(--text-muted); font-weight: 600; }
.search-control { flex: 1 1 280px; }
.controls select, .controls input, .calc-form select, .calc-form input {
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 11px; font-size: 14px; color: var(--text); min-width: 160px;
}
.search-control input { width: 100%; min-width: 0; }
.controls input:focus, .controls select:focus, .calc-form select:focus, .calc-form input:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(23,105,170,.15);
}

/* ---------- Materials grid ---------- */
.materials-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px;
}
.mat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 15px; box-shadow: var(--shadow); cursor: pointer;
  transition: transform .12s, box-shadow .12s, border-color .12s;
  display: flex; flex-direction: column; gap: 6px;
}
.mat-card:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: 0 4px 14px rgba(20,40,70,.14); }
.mat-card .mat-name { font-weight: 700; font-size: 15.5px; color: var(--text); }
.mat-card .mat-cat { font-size: 12px; color: var(--primary); font-weight: 600; text-transform: uppercase; letter-spacing: .4px; }
.mat-card .mat-grades { font-size: 12.5px; color: var(--text-muted); }
.mat-card .mat-mini { display: flex; gap: 14px; margin-top: 4px; font-size: 12px; color: var(--text-muted); }
.mat-card .mat-mini b { color: var(--text); font-weight: 700; }
.mat-card .mat-xref { margin-top: 6px; font-size: 11px; line-height: 1.5; color: var(--text-muted); border-top: 1px dashed var(--border); padding-top: 5px; }
.mat-card .mat-xref b { color: var(--primary); }

.no-results { text-align: center; color: var(--text-muted); padding: 40px; font-size: 15px; }

/* ---------- Range filters + checkbox ---------- */
.range-control .range-row { display: flex; align-items: center; gap: 6px; }
.range-control input { width: 72px; min-width: 0; }
.range-sep { color: var(--text-muted); }
.range-unit { font-size: 12px; color: var(--text-muted); margin-left: 2px; white-space: nowrap; }
.checkbox-control { justify-content: flex-end; }
.presets-control { flex-direction: column; gap: 5px; }
.presets-row { display: flex; flex-wrap: wrap; gap: 6px; }
.preset-btn {
  padding: 6px 11px; border-radius: 8px; font-size: 12.5px; font-weight: 600;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  cursor: pointer; transition: background .15s, border-color .15s, transform .05s; white-space: nowrap;
}
.preset-btn:hover { background: #e6edf5; border-color: var(--primary); }
.preset-btn:active { transform: translateY(1px); }
.preset-clear { background: #fbeae0; border-color: #f0c4a8; color: var(--accent); }
.preset-clear:hover { background: #f7d9c4; border-color: var(--accent); }
.checkbox-label { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text-muted); font-weight: 600; cursor: pointer; height: 38px; }
.checkbox-label input { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }

/* ---------- Material card action buttons ---------- */
.mat-card .star-btn, .mat-card .cmp-btn {
  position: absolute; top: 10px; width: 30px; height: 30px; border: none; border-radius: 50%;
  background: var(--surface-2); color: var(--text-muted); font-size: 16px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: background .15s, color .15s, transform .05s;
}
.mat-card .star-btn { right: 10px; color: var(--accent); }
.mat-card .cmp-btn { right: 46px; font-size: 18px; }
.mat-card .star-btn:hover, .mat-card .cmp-btn:hover { background: var(--border); }
.mat-card .star-btn:active, .mat-card .cmp-btn:active { transform: scale(.92); }
.mat-card { position: relative; padding-right: 56px; }
.mat-card.fav { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.mat-card.fav .star-btn { background: var(--accent); color: #fff; }

/* ---------- XRef equivalence cards ---------- */
.xref-equiv-head { background: var(--primary); color: #fff; border-radius: 8px 8px 0 0; margin-top: 6px; }
.xref-equiv-card { border-left: 4px solid var(--primary); padding-right: 16px; }
.xref-equiv-card .eq-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 4px 14px; margin-top: 8px; }
.eq-row { display: flex; justify-content: space-between; gap: 8px; font-size: 12.5px; padding: 2px 0; border-bottom: 1px dashed var(--border); }
.eq-row .eq-sys { color: var(--text-muted); font-weight: 600; letter-spacing: .3px; }
.eq-row .eq-val { color: var(--text); text-align: right; }

/* ---------- Tools bar ---------- */
.tools-bar {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 0 0 16px;
  padding: 12px 14px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.tools-spacer { flex: 1 1 auto; }
.compare-hint { font-size: 12.5px; color: var(--text-muted); font-style: italic; }

/* ---------- Compare bar (chips) ---------- */
.compare-bar {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 0 0 18px;
  padding: 10px 14px; background: rgba(23,105,170,.07); border: 1px solid rgba(23,105,170,.25);
  border-radius: var(--radius);
}
.compare-bar[hidden] { display: none; }
.compare-bar-label { font-size: 13px; font-weight: 700; color: var(--primary-dark); }
.compare-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.cmp-chip {
  background: var(--primary); color: #fff; border-radius: 20px; padding: 4px 12px;
  font-size: 12.5px; font-weight: 600; cursor: pointer; transition: background .15s;
}
.cmp-chip:hover { background: var(--primary-dark); }

/* ---------- Wide modal + tables + chart ---------- */
.modal.wide, .modal-wide { max-width: 880px; }
.compare-table { width: 100%; border-collapse: collapse; margin-top: 6px; font-size: 13.5px; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-top: 4px; }
.compare-table th, .compare-table td { padding: 9px 10px; border-bottom: 1px solid var(--border); text-align: left; }
.compare-table thead th { color: var(--primary-dark); font-size: 14px; }
.compare-table .cmp-label { color: var(--text-muted); font-weight: 600; white-space: nowrap; }
.compare-table td { font-variant-numeric: tabular-nums; }
.chart-body { overflow-x: auto; }
.scatter-svg { width: 100%; height: auto; display: block; }
.scatter-svg .ax { stroke: var(--text-muted); stroke-width: 1.2; }
.scatter-svg .grid { stroke: var(--border); stroke-width: 1; }
.scatter-svg .axlbl { fill: var(--text-muted); font-size: 12px; }
.scatter-svg .axname { fill: var(--text); font-size: 13px; font-weight: 600; }
.scatter-svg .pt { fill: var(--primary); opacity: .55; }
.scatter-svg .pt:hover { opacity: 1; }
.chart-note { text-align: center; color: var(--text-muted); font-size: 12.5px; margin: 10px 0 0; }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(15, 30, 50, .55);
  display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 100;
}
.modal-overlay[hidden] { display: none; }
.modal {
  background: var(--surface); border-radius: 14px; width: 100%; max-width: 640px;
  max-height: 88vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,.3); position: relative;
}
.modal-close {
  position: absolute; top: 12px; right: 14px; width: 32px; height: 32px; border-radius: 50%;
  border: none; background: var(--surface-2); color: var(--text-muted); font-size: 22px; cursor: pointer; line-height: 1;
}
.modal-close:hover { background: var(--border); }
.modal-body { padding: 24px 26px 28px; }
.modal-body h2 { margin: 0 0 2px; font-size: 21px; }
.modal-toolbar { margin: 4px 0 12px; display: flex; gap: 8px; }
.modal-cat { color: var(--primary); font-weight: 700; font-size: 12.5px; text-transform: uppercase; letter-spacing: .5px; margin-bottom: 14px; }
.modal-section-title { font-size: 13px; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); margin: 18px 0 8px; font-weight: 700; }

.prop-table { width: 100%; border-collapse: collapse; }
.prop-table tr { border-bottom: 1px solid var(--border); }
.prop-table td { padding: 8px 6px; font-size: 14px; }
.prop-table td:first-child { color: var(--text-muted); width: 52%; }
.prop-table td:last-child { text-align: right; font-weight: 600; font-variant-numeric: tabular-nums; }

.grade-list { display: flex; flex-wrap: wrap; gap: 6px; }
.grade-chip {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 3px 8px; font-size: 12.5px; font-weight: 600;
}
.grade-chip span { color: var(--text-muted); font-weight: 500; margin-right: 4px; }

.app-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.app-tag {
  background: rgba(23,105,170,.1); color: var(--primary-dark); border-radius: 20px;
  padding: 4px 11px; font-size: 12.5px; font-weight: 600;
}
.modal-note { font-size: 12.5px; color: var(--text-muted); margin-top: 8px; font-style: italic; }

/* ---------- Calculator ---------- */
.calc-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); max-width: 720px; margin: 0 auto;
}
.calc-card h2 { margin: 0 0 4px; font-size: 20px; }
.calc-desc { color: var(--text-muted); margin: 0 0 18px; font-size: 14px; }
.calc-form { display: flex; flex-direction: column; gap: 16px; }
.dim-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; }
.dim-field { display: flex; flex-direction: column; gap: 5px; }
.dim-field label { font-size: 12.5px; color: var(--text-muted); font-weight: 600; }
.dim-field input { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 9px 11px; font-size: 14px; }
.dim-field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(23,105,170,.15); }
.btn-block { width: 100%; padding: 11px; font-size: 15px; background: var(--primary); color: #fff; border: none; }
.btn-block:hover { background: var(--primary-dark); }
.calc-error { color: #c0392b; font-size: 13.5px; margin: 4px 0 0; }
.calc-result {
  margin-top: 20px; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 18px; display: flex; flex-direction: column; gap: 8px;
}
.calc-result[hidden] { display: none; }
.result-row { display: flex; justify-content: space-between; align-items: baseline; }
.result-row span { color: var(--text-muted); font-size: 14px; }
.result-row strong { font-size: 18px; color: var(--primary-dark); font-variant-numeric: tabular-nums; }

/* ---------- Standard Cross-Reference ---------- */
.xref-wrap { max-width: 1200px; margin: 0 auto; }
.xref-wrap h2 { margin: 0 0 4px; font-size: 20px; }
.xref-bar { display: flex; gap: 10px; margin: 16px 0 22px; }
.xref-bar input {
  flex: 1; background: var(--surface); border: 1px solid var(--border); border-radius: 9px;
  padding: 11px 14px; font-size: 15px;
}
.xref-bar input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(23,105,170,.15); }
.xref-grades { font-size: 12.5px; color: var(--text-muted); margin-top: 6px; line-height: 1.5; word-break: break-word; }
.xref-card { cursor: pointer; }
.xref-card:hover { border-color: var(--primary); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); }
.site-footer p {
  max-width: 1200px; margin: 0 auto; padding: 16px 20px; font-size: 12px; color: var(--text-muted); text-align: center;
}

/* ---------- Multi-application filter ---------- */
.app-filter-control { position: relative; }
.app-filter-btn {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); border-radius: 9px;
  padding: 9px 12px; font-size: 14px; color: var(--text); font-family: inherit;
}
.app-filter-btn:hover { border-color: var(--primary); }
.app-filter-btn.active { border-color: var(--primary); color: var(--primary-dark); font-weight: 600; }
.app-count { color: var(--primary-dark); font-weight: 600; }
.caret { font-size: 10px; opacity: .6; }
.app-panel {
  position: absolute; z-index: 30; top: calc(100% + 6px); left: 0; min-width: 250px; max-height: 330px; overflow: auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); padding: 12px;
}
.app-panel[hidden] { display: none; }
.app-group { margin: 18px 0; }
.app-group-head { font-size: 15px; font-weight: 600; color: var(--text); margin: 4px 0 10px; padding-bottom: 6px; border-bottom: 2px solid var(--primary); display: flex; align-items: center; gap: 8px; }
.app-group-count { font-size: 12px; font-weight: 600; color: #fff; background: var(--primary); border-radius: 999px; padding: 1px 9px; min-width: 22px; text-align: center; }
.app-panel-head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-size: 13px; color: var(--text-muted); }
.app-panel-head select { background: var(--surface); border: 1px solid var(--border); border-radius: 7px; padding: 5px 8px; font-size: 13px; }
.app-clear { margin-left: auto; background: none; border: 1px solid var(--border); border-radius: 7px; padding: 5px 10px; font-size: 12.5px; cursor: pointer; color: var(--text); }
.app-clear:hover { border-color: var(--primary); color: var(--primary-dark); }
.app-checks { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 12px; }
.app-check { display: flex; align-items: center; gap: 7px; font-size: 13px; cursor: pointer; padding: 3px 2px; }
.app-check input { accent-color: var(--primary); }

/* ---------- Bubble legend ---------- */
.bubble-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 10px; font-size: 12.5px; }
.radar-svg { width: 100%; height: auto; display: block; max-width: 560px; margin: 0 auto; }
.radar-grid { fill: none; stroke: var(--border); stroke-width: 1; }
.radar-axis { stroke: var(--border); stroke-width: 1; }
.radar-lbl { fill: var(--text); font-size: 11px; }
.leg-item { display: inline-flex; align-items: center; gap: 6px; color: var(--text-muted); }
.leg-dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }

@media (max-width: 640px) {
  .topbar-inner { flex-direction: column; align-items: flex-start; }
  .topbar-actions { width: 100%; justify-content: space-between; }
  .brand-text h1 { font-size: 17px; }
  .tabs { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
  .tab { white-space: nowrap; }
  .controls { flex-direction: column; align-items: stretch; }
  .control { width: 100%; }
  .control select, .control input { min-width: 0; width: 100%; }
  .range-control .range-row { flex-wrap: wrap; }
  .tools-bar { flex-direction: column; align-items: stretch; gap: 8px; }
  .tools-bar .btn { width: 100%; }
  .tools-spacer { display: none; }
  .compare-hint { text-align: center; }
  .modal-body { padding: 18px 16px 22px; }
  .modal-body h2 { font-size: 19px; }
  .app-panel { position: static; max-height: none; width: 100%; box-shadow: none; margin-top: 8px; }
  .app-checks { grid-template-columns: 1fr; }
  .bubble-legend { font-size: 11.5px; }
}

@media (max-width: 400px) {
  main { padding: 16px 12px 32px; }
  .materials-grid { grid-template-columns: 1fr; }
  .brand-text h1 { font-size: 16px; }
  .topbar-actions .btn { padding: 7px 10px; font-size: 12.5px; }
}

/* ---------- Quick-tools sub-tabs ---------- */
.tool-tabs { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.tool-tab { border: 1px solid var(--border); background: var(--surface); color: var(--text-muted);
  padding: 8px 18px; border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 600; }
.tool-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.unit-cat-tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.unit-cat { border: 1px solid var(--border); background: var(--surface); color: var(--text-muted);
  padding: 6px 14px; border-radius: 7px; cursor: pointer; font-size: 13.5px; font-weight: 600; }
.unit-cat.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.calc-note { margin-top: 12px; font-size: 12.5px; color: var(--text-muted); line-height: 1.5; }

/* ---------- Knowledge base ---------- */
.kb-layout { display: flex; gap: 22px; align-items: flex-start; margin-top: 8px; }
.kb-nav { flex: 0 0 180px; display: flex; flex-direction: column; gap: 6px; position: sticky; top: 12px; }
.kb-link { text-align: left; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: 9px 12px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.kb-link.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.kb-content { flex: 1; min-width: 0; line-height: 1.75; font-size: 14.5px; }
.kb-content p { margin: 0 0 12px; }
.kb-content ul { margin: 0 0 12px; padding-left: 20px; }
.kb-content li { margin: 5px 0; }

/* ---------- XRef bar select ---------- */
#xrefCat { padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text); font-size: 14px; }
.xref-bar .btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

@media (max-width: 640px) {
  .kb-layout { flex-direction: column; }
  .kb-nav { flex-direction: row; flex-wrap: wrap; position: static; flex: 1 1 auto; }
  .kb-link { flex: 1 1 auto; text-align: center; }
  #xrefCat { width: 100%; }
}

/* ---------- Engineering estimates tool ---------- */
.est-sub { margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--border); }
.est-sub:first-of-type { margin-top: 0; padding-top: 0; border-top: none; }
.est-sub h3 { margin: 0 0 6px; font-size: 16px; color: var(--text); }

/* ---------- Data coverage dashboard ---------- */
.cov-table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 13px; }
.cov-table th, .cov-table td { padding: 7px 9px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.cov-table thead th { font-weight: 600; color: var(--text-muted); font-size: 12px; }
.cov-table td.num, .cov-table th.num { text-align: right; white-space: nowrap; }
.cov-table td.cat { font-weight: 600; color: var(--text); }
.cov-bar { position: relative; background: var(--border); border-radius: 4px; height: 17px; min-width: 58px; overflow: hidden; }
.cov-bar span { display: block; height: 100%; background: var(--accent); transition: width .2s; }
.cov-bar.hi span { background: #2e9e5b; }
.cov-bar.mid span { background: #d99100; }
.cov-bar.lo span { background: #c0492b; }
.cov-bar em { position: absolute; right: 7px; top: 0; line-height: 17px; font-style: normal;
  font-size: 11px; font-weight: 700; color: #fff; mix-blend-mode: difference; }
.cov-total td { font-weight: 700; border-top: 2px solid var(--border); }
@media (max-width: 720px) {
  .cov-table { font-size: 11.5px; }
  .cov-table th, .cov-table td { padding: 5px 5px; }
}

/* ---------- Grade decoder output ---------- */
.decode-out { margin-top: 8px; font-size: 13.5px; }
.decode-row { display: flex; gap: 10px; padding: 4px 0; border-bottom: 1px dashed var(--border); }
.decode-row:last-child { border-bottom: none; }
.decode-row b { flex: 0 0 140px; color: var(--text-muted); font-weight: 600; }
.decode-row span { flex: 1; color: var(--text); }

/* ---------- Similar materials (detail modal) ---------- */
.sim-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.sim-chip {
  cursor: pointer; padding: 3px 10px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 12px; color: var(--text); transition: background .12s, color .12s, border-color .12s;
}
.sim-chip:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- Compare best/worst highlight ---------- */
.cmp-best { background: rgba(232, 115, 12, 0.13); color: var(--accent); font-weight: 700; }
.cmp-worst { color: var(--text-muted); }

/* ---------- Bearing Selector table ---------- */
.bearing-table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 6px; }
.bearing-table th, .bearing-table td { border: 1px solid var(--border); padding: 6px 9px; text-align: left; }
.bearing-table th { background: var(--bg); color: var(--text-muted); font-weight: 600; }
.bearing-table tbody tr { cursor: pointer; }
.bearing-table tbody tr:hover { background: rgba(232, 115, 12, 0.08); }
.bearing-table td:nth-child(5) { font-weight: 700; color: var(--accent); }

/* ---------- Search suggestions ---------- */
.search-control { position: relative; }
.search-suggest { position: absolute; top: 100%; left: 0; right: 0; z-index: 30; background: var(--surface); border: 1px solid var(--border); border-radius: 0 0 var(--radius) var(--radius); box-shadow: var(--shadow); max-height: 320px; overflow-y: auto; }
.suggest-item { display: flex; justify-content: space-between; gap: 10px; padding: 8px 12px; cursor: pointer; border-bottom: 1px solid var(--border); }
.suggest-item:last-child { border-bottom: none; }
.suggest-item:hover { background: var(--surface-2); }
.suggest-name { font-weight: 600; }
.suggest-grade { color: var(--text-muted); font-size: 12px; }

/* ---------- Detail head + print spec button ---------- */
.modal-detail-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.modal-detail-head h2 { margin: 0; }
.modal-print-btn { flex: 0 0 auto; background: var(--accent); color: #fff; border: none; border-radius: 6px; padding: 6px 12px; cursor: pointer; font-size: 13px; }
.modal-print-btn:hover { filter: brightness(1.05); }

/* ---------- Category benchmark table ---------- */
.bench-sub { font-size: 12px; color: var(--text-muted); font-weight: 400; margin-left: 6px; }
.bench-table td:nth-child(3) { color: var(--text-muted); }

/* ---------- Knowledge draft badge ---------- */
.kb-draft-badge { display: inline-block; background: rgba(232,115,12,0.14); color: var(--accent); border: 1px solid rgba(232,115,12,0.35); border-radius: 6px; padding: 4px 10px; font-size: 12px; margin-bottom: 10px; font-weight: 600; }

/* ---------- About note ---------- */
.about-note { font-size: 14px; line-height: 1.6; color: var(--text); }