/* =========================================================
   What Is the Rule of Thumb for Metal Stamping? - scoped stylesheet
   Container class: .gc-switch
   100% scope isolation - does NOT touch global header/nav.
   Layout system inherited from the Goldcattle document template
   (doc header + sticky grouped TOC rail + 760px reading column
   + numbered chapters + blue-left-rule callouts + white CTA card).
   ========================================================= */
.gc-switch {
  --blue:#0052cc;
  --blue-700:#0046b0;
  --navy:#0f2747;
  --accent:#00a3c4;
  --ink:#1f2733;
  --muted:#545f6e;
  --line:#e2e9f2;
  --soft:#f5f8fc;
  --soft2:#eef3f9;
  --up:#c0392b;
  --down:#1e7d4f;
  --warn:#b57500;
  --radius:12px;
  --shadow-sm:0 1px 2px rgba(15,39,71,.05),0 8px 24px rgba(15,39,71,.06);

  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  background:#fff;
  counter-reset:gcchap;
  scroll-behavior:smooth;
}
.gc-switch *,.gc-switch *::before,.gc-switch *::after{box-sizing:border-box;}
.gc-switch h2,.gc-switch h3,.gc-switch h4{color:var(--navy);line-height:1.24;font-weight:800;letter-spacing:-.015em;}
.gc-switch h2{font-size:24px;margin:0 0 12px;}
.gc-switch h3{font-size:18.5px;margin:22px 0 8px;font-weight:700;letter-spacing:-.01em;}
.gc-switch h4{font-size:16.5px;margin:0 0 6px;}
.gc-switch p{margin:0 0 16px;color:var(--ink);}
.gc-switch a{color:var(--blue);text-decoration:none;border-bottom:1px solid rgba(0,82,204,.28);transition:border-color .15s ease,color .15s ease;}
.gc-switch a:hover{border-bottom-color:var(--blue);color:var(--blue-700);}
.gc-switch strong{color:var(--navy);font-weight:700;}
.gc-switch img{display:block;max-width:100%;height:auto;border-radius:10px;background:var(--soft2);border:1px solid var(--line);}
.gc-switch ul,.gc-switch ol{margin:0 0 18px;padding-left:22px;}
.gc-switch li{margin:7px 0;color:var(--ink);}
.gc-switch .gc-lede{font-size:18.5px;color:var(--muted);line-height:1.66;}

/* ---------- Doc header (left text + contained media) ---------- */
.gc-switch .gc-dochead{padding:44px 0 18px;border-bottom:1px solid var(--line);}
.gc-switch .gc-head-grid{display:grid;grid-template-columns:minmax(0,1fr) 448px;gap:46px;align-items:center;}
.gc-switch .gc-head-text{min-width:0;}
.gc-switch .gc-eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:14px;}
.gc-switch .gc-eyebrow::before{content:"";width:24px;height:2px;background:var(--blue);border-radius:2px;}
.gc-switch .gc-dochead h2{font-size:38px;margin:0 0 14px;line-height:1.13;}
.gc-switch .gc-dochead .gc-lede{font-size:18px;margin:0;line-height:1.64;color:var(--muted);}
.gc-switch .gc-head-cta{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin:24px 0 0;}
.gc-switch .gc-hero-media{margin:0;}
.gc-switch .gc-hero-media img{display:block;width:100%;height:auto;border-radius:12px;background:var(--soft2);border:1px solid var(--line);box-shadow:var(--shadow-sm);}

/* ---------- Layout: sticky TOC rail + reading column ---------- */
.gc-switch .gc-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:52px;padding:34px 0 72px;align-items:start;}
.gc-switch .gc-doc{max-width:760px;min-width:0;}

/* ---------- Rail / TOC ---------- */
.gc-switch .gc-rail{position:sticky;top:22px;align-self:start;max-height:calc(100vh - 44px);overflow-y:auto;}
.gc-switch .gc-rail-label{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:800;margin:0 0 10px;}
.gc-switch .gc-rail-group{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:800;margin:15px 0 4px;}
.gc-switch .gc-rail-group:first-of-type{margin-top:0;}
.gc-switch .gc-rail ul{list-style:none;margin:0;padding:0;}
.gc-switch .gc-rail li a{display:block;font-size:13.5px;line-height:1.3;color:var(--muted);text-decoration:none;border:0;border-left:2px solid var(--line);padding:5px 0 5px 12px;transition:color .15s ease,border-color .15s ease;}
.gc-switch .gc-rail li a:hover{color:var(--blue);border-left-color:var(--blue);}
.gc-switch .gc-rail li a.active{color:var(--navy);font-weight:700;border-left-color:var(--blue);}

/* ---------- At a Glance ---------- */
.gc-switch .gc-glance{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;margin:4px 0 6px;}
.gc-switch .gc-glance h2{margin:0 0 14px;font-size:14px;letter-spacing:.1em;text-transform:uppercase;color:var(--navy);}
.gc-switch .gc-glance-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 30px;}
.gc-switch .gc-glance-row{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14.5px;}
.gc-switch .gc-glance-row .k{color:var(--muted);}
.gc-switch .gc-glance-row .v{color:var(--navy);font-weight:700;text-align:right;}

/* ---------- Quick Answer (blue left rule) ---------- */
.gc-switch .gc-answer{border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:10px;background:var(--soft);padding:20px 22px;margin:32px 0 6px;}
.gc-switch .gc-answer .gc-tag{display:inline-block;font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:10px;}
.gc-switch .gc-answer p{color:var(--ink);margin:0;font-size:17px;line-height:1.74;}
.gc-switch .gc-answer p + p{margin-top:12px;}
.gc-switch .gc-answer p strong{color:var(--navy);}

/* ---------- Numbered chapter ---------- */
.gc-switch .gc-chapter{position:relative;counter-increment:gcchap;margin:46px 0 14px;padding:0 0 10px;border-bottom:2px solid var(--line);font-size:25px;scroll-margin-top:92px;}
.gc-switch .gc-chapter::before{content:"Section " counter(gcchap,decimal-leading-zero);display:block;font-size:11.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);margin-bottom:7px;}

/* ---------- Soft cards ---------- */
.gc-switch .gc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:18px 0 6px;}
.gc-switch .gc-grid-3{grid-template-columns:repeat(3,1fr);}
.gc-switch .gc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;transition:box-shadow .18s ease,border-color .18s ease;}
.gc-switch .gc-card:hover{box-shadow:var(--shadow-sm);border-color:#d3deec;}
.gc-switch .gc-card h3{margin:0 0 6px;font-size:16.5px;color:var(--navy);}
.gc-switch .gc-card p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.62;}
.gc-switch .gc-card p + p{margin-top:8px;}
.gc-switch .gc-card .gc-card-k{display:block;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:5px;}

/* ---------- Dense operator ranking ---------- */
.gc-switch .gc-rank{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:16px 0 6px;}
.gc-switch .gc-rank-row{display:grid;grid-template-columns:56px minmax(0,1fr);gap:0;border-bottom:1px solid var(--line);}
.gc-switch .gc-rank-row:last-child{border-bottom:0;}
.gc-switch .gc-rank-num{background:var(--soft);color:var(--blue);font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line);letter-spacing:.02em;}
.gc-switch .gc-rank-body{padding:13px 17px;font-size:14.5px;color:var(--muted);line-height:1.62;}
.gc-switch .gc-rank-body strong{display:block;color:var(--navy);font-size:15.5px;margin-bottom:3px;}

/* ---------- Data / comparison table ---------- */
.gc-switch .gc-table{width:100%;border-collapse:collapse;margin:16px 0 6px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:15px;}
.gc-switch .gc-table th,.gc-switch .gc-table td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top;}
.gc-switch .gc-table thead th{background:var(--soft);color:var(--navy);font-weight:800;border-bottom:2px solid var(--line);font-size:13px;letter-spacing:.02em;text-transform:uppercase;}
.gc-switch .gc-table tbody tr:nth-child(even){background:#fafcfe;}
.gc-switch .gc-table tbody tr:last-child td{border-bottom:0;}
.gc-switch .gc-table td:first-child{font-weight:700;color:var(--navy);}
.gc-switch .gc-table td.num{text-align:right;font-variant-numeric:tabular-nums;font-weight:700;color:var(--navy);}
.gc-switch .gc-table caption{caption-side:bottom;text-align:left;font-size:13px;color:var(--muted);padding:10px 2px 0;}

/* ---------- Two-col challenge -> control ---------- */
.gc-switch .gc-cc{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:16px 0 6px;}
.gc-switch .gc-cc > div{padding:13px 17px;font-size:14.5px;}
.gc-switch .gc-cc .gc-cc-l{background:var(--soft);border-right:1px solid var(--line);color:var(--muted);}
.gc-switch .gc-cc .gc-cc-r{color:var(--ink);}
.gc-switch .gc-cc .gc-cc-l strong{color:var(--navy);}
.gc-switch .gc-cc .gc-cc-r strong{color:var(--blue);}

/* ---------- Note / callout ---------- */
.gc-switch .gc-note{background:var(--soft);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:16px 18px;margin:18px 0;font-size:15.5px;color:var(--ink);line-height:1.7;}
.gc-switch .gc-note strong{color:var(--navy);}
.gc-switch .gc-note p{margin:0;}
.gc-switch .gc-note p + p{margin-top:10px;}

/* ---------- Formula block ---------- */
.gc-switch .gc-formula{background:#0f2747;color:#eaf1fb;border-radius:12px;padding:20px 22px;margin:20px 0;font-size:16px;line-height:1.7;}
.gc-switch .gc-formula .gc-formula-k{display:block;font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:#7fb2f0;font-weight:800;margin-bottom:9px;}
.gc-switch .gc-formula code{background:transparent;color:#fff;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;font-size:15.5px;white-space:normal;}
.gc-switch .gc-formula strong{color:#ffffff;}
.gc-switch .gc-formula .gc-formula-note{display:block;margin-top:10px;font-size:13.5px;color:#a9c4e4;}

/* ---------- Compact two-column card pair ---------- */
.gc-switch .gc-cr-2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0 6px;}

/* ---------- Worked arithmetic strip ---------- */
.gc-switch .gc-arith{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0 6px;}
.gc-switch .gc-arith-cell{border:1px solid var(--line);border-radius:10px;background:#fff;padding:14px 15px;}
.gc-switch .gc-arith-cell .q{display:block;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:6px;}
.gc-switch .gc-arith-cell .eq{display:block;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;line-height:1.5;}
.gc-switch .gc-arith-cell .tot{display:block;margin-top:8px;font-size:19px;font-weight:800;color:var(--navy);font-variant-numeric:tabular-nums;}
.gc-switch .gc-arith-cell .per{display:block;font-size:12.5px;color:var(--muted);}

/* ---------- Figure (photo) ---------- */
.gc-switch .gc-figure{margin:22px 0 6px;}
.gc-switch .gc-figure img{width:100%;height:auto;box-shadow:var(--shadow-sm);}
.gc-switch .gc-figure figcaption{font-size:13.5px;color:var(--muted);margin-top:9px;}

/* ---------- Diagram frame (inline SVG) ---------- */
.gc-switch .gc-diagram{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:18px 18px 12px;margin:20px 0 6px;box-shadow:var(--shadow-sm);}
.gc-switch .gc-diagram svg{display:block;width:100%;height:auto;}
.gc-switch .gc-diagram figcaption{font-size:13.5px;color:var(--muted);margin-top:10px;line-height:1.6;}
.gc-switch .gc-diagram .gc-dg-title{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:10px;}

/* ---------- Cost movement arrows ---------- */
.gc-switch .up{color:var(--up);font-weight:800;}
.gc-switch .down{color:var(--down);font-weight:800;}
.gc-switch .warn{color:var(--warn);font-weight:800;}

/* ---------- Checklist ---------- */
.gc-switch .gc-check{list-style:none;padding:0;margin:18px 0 6px;display:grid;grid-template-columns:1fr 1fr;gap:8px 22px;}
.gc-switch .gc-check li{margin:0;padding:9px 0 9px 30px;border-bottom:1px dashed var(--line);font-size:14.5px;position:relative;}
.gc-switch .gc-check li::before{content:"";position:absolute;left:0;top:15px;width:14px;height:14px;border:1.5px solid var(--blue);border-radius:3px;}

/* ---------- Case panel ---------- */
.gc-switch .gc-case{border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:18px 0;background:#fff;box-shadow:var(--shadow-sm);}
.gc-switch .gc-case .gc-case-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start;margin-bottom:16px;}
.gc-switch .gc-case h3{margin:0 0 4px;font-size:18px;}
.gc-switch .gc-case .gc-case-sub{font-size:13.5px;color:var(--muted);margin:0 0 14px;}
.gc-switch .gc-spec{list-style:none;padding:0;margin:0;}
.gc-switch .gc-spec li{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14.5px;margin:0;}
.gc-switch .gc-spec li:last-child{border-bottom:0;}
.gc-switch .gc-spec .k{color:var(--muted);}
.gc-switch .gc-spec .v{color:var(--navy);font-weight:700;text-align:right;}
.gc-switch .gc-case .gc-case-cap{margin:0;font-size:14.5px;color:var(--muted);line-height:1.66;}

/* ---------- Direct answers (GEO blocks) ---------- */
.gc-switch .gc-qa{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:18px 0 6px;background:#fff;}
.gc-switch .gc-qa-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);gap:0;border-bottom:1px solid var(--line);}
.gc-switch .gc-qa-row:last-child{border-bottom:0;}
.gc-switch .gc-qa-q{background:var(--soft);padding:14px 17px;font-size:14.5px;font-weight:700;color:var(--navy);border-right:1px solid var(--line);}
.gc-switch .gc-qa-a{padding:14px 17px;font-size:14.5px;color:var(--ink);line-height:1.64;}

/* ---------- FAQ ---------- */
.gc-switch .gc-faq details{border:1px solid var(--line);border-radius:10px;margin:11px 0;background:#fff;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;}
.gc-switch .gc-faq details:hover{border-color:#d3deec;box-shadow:var(--shadow-sm);}
.gc-switch .gc-faq summary{cursor:pointer;padding:15px 19px;font-weight:700;color:var(--navy);font-size:16px;list-style:none;position:relative;padding-right:44px;line-height:1.45;}
.gc-switch .gc-faq summary::-webkit-details-marker{display:none;}
.gc-switch .gc-faq summary::after{content:"+";position:absolute;right:17px;top:50%;transform:translateY(-50%);font-size:21px;color:var(--blue);font-weight:800;line-height:1;}
.gc-switch .gc-faq details[open] summary::after{content:"\2013";}
.gc-switch .gc-faq .gc-a{padding:0 19px 17px;color:var(--ink);font-size:15.5px;line-height:1.72;}
.gc-switch .gc-faq .gc-a p{margin:0 0 10px;}
.gc-switch .gc-faq .gc-a p:last-child{margin-bottom:0;}

/* ---------- CTA (white card, blue top rule) ---------- */
.gc-switch .gc-cta{border:1px solid var(--line);border-top:4px solid var(--blue);background:#fff;border-radius:14px;padding:32px 30px;margin:48px 0 0;box-shadow:var(--shadow-sm);}
.gc-switch .gc-cta h2{color:var(--navy);margin:0 0 9px;font-size:25px;}
.gc-switch .gc-cta p{color:var(--muted);margin:0 0 22px;max-width:640px;font-size:16.5px;line-height:1.7;}
.gc-switch .gc-cta .gcq-btn{font-size:17px;padding:15px 34px;}
.gc-switch .gc-cta .gc-cta-link{display:inline-block;margin-top:16px;color:var(--blue);border-bottom:1px solid rgba(0,82,204,.3);font-size:15px;}
.gc-switch .gc-cta .gc-cta-link:hover{border-bottom-color:var(--blue);color:var(--blue-700);}
.gc-switch .gc-cta .gc-cta-micro{color:var(--muted);font-size:13.5px;margin:15px 0 0;}

/* ---------- Standard site CTA button ---------- */
.gc-switch .gcq-btn{display:inline-block;cursor:pointer;background:var(--blue);color:#fff;font-size:16px;font-weight:800;padding:14px 30px;border-radius:10px;box-shadow:0 8px 22px rgba(0,82,204,.30);border:0;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease,background .15s ease;}
.gc-switch .gcq-btn:hover{background:var(--blue-700);transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,82,204,.42);border:0;color:#fff;}
.gc-switch .gcq-btn:active{transform:translateY(0);box-shadow:0 6px 16px rgba(0,82,204,.28);}
.gc-switch .gc-hero-link{color:var(--navy);font-weight:700;font-size:15px;border-bottom:1px solid rgba(15,39,71,.25);}
.gc-switch .gc-hero-link:hover{border-bottom-color:var(--navy);color:var(--blue);}

/* ---------- Byline / methodology ---------- */
.gc-switch .gc-byline{font-size:13.5px;color:var(--muted);margin:16px 0 0;line-height:1.7;}
.gc-switch .gc-method{border:1px solid var(--line);border-radius:var(--radius);background:var(--soft);padding:20px 22px;margin:22px 0 6px;}
.gc-switch .gc-method h3{margin:0 0 10px;font-size:16px;letter-spacing:.02em;}
.gc-switch .gc-method ul{margin:0;padding-left:20px;}
.gc-switch .gc-method li{font-size:14.5px;color:var(--muted);margin:6px 0;}


/* ---------- Responsive ---------- */
@media (max-width:980px){
  .gc-switch .gc-layout{grid-template-columns:1fr;gap:0;padding:28px 0 56px;}
  .gc-switch .gc-rail{display:none;}
  .gc-switch .gc-doc{max-width:none;}
  .gc-switch .gc-dochead{padding:34px 0 14px;}
  .gc-switch .gc-head-grid{grid-template-columns:1fr;gap:22px;}
  .gc-switch .gc-dochead h2{font-size:30px;}
  .gc-switch .gc-glance-grid,.gc-switch .gc-grid,.gc-switch .gc-grid-3,.gc-switch .gc-cc,.gc-switch .gc-case .gc-case-grid,.gc-switch .gc-check,.gc-switch .gc-qa-row{grid-template-columns:1fr;}
  .gc-switch .gc-cc .gc-cc-l{border-right:0;border-bottom:1px solid var(--line);}
  .gc-switch .gc-qa-q{border-right:0;border-bottom:1px solid var(--line);}
  .gc-switch .gc-arith{grid-template-columns:1fr 1fr;}
  .gc-switch .gc-chapter{font-size:22px;margin:40px 0 12px;}
  .gc-switch .gc-glance-row .v{font-size:13.5px;}
  .gc-switch .gc-table{font-size:14px;}
  .gc-switch .gc-table th,.gc-switch .gc-table td{padding:10px 12px;}
}
@media (max-width:520px){
  .gc-switch{padding:0 16px;}
  .gc-switch .gc-dochead h2{font-size:26px;}
  .gc-switch .gc-glance-grid{grid-template-columns:1fr;}
  .gc-switch .gc-arith{grid-template-columns:1fr;}
  .gc-switch .gc-rank-row{grid-template-columns:44px minmax(0,1fr);}
}

/* ---------- Weighted qualification scoring instrument ---------- */
.gc-switch .gc-score{width:100%;border-collapse:collapse;margin:18px 0 6px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:14.5px;background:#fff;}
.gc-switch .gc-score th,.gc-switch .gc-score td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top;}
.gc-switch .gc-score thead th{background:var(--soft);color:var(--navy);font-weight:800;font-size:12.5px;letter-spacing:.03em;text-transform:uppercase;border-bottom:2px solid var(--line);}
.gc-switch .gc-score tbody tr:last-child td{border-bottom:0;}
.gc-switch .gc-score td.w{text-align:center;font-weight:800;color:var(--blue);font-variant-numeric:tabular-nums;white-space:nowrap;}
.gc-switch .gc-score td.dim{font-weight:700;color:var(--navy);}
.gc-switch .gc-score tfoot td{background:#0f2747;color:#fff;font-weight:800;}
.gc-switch .gc-score tfoot td.w{color:#7fb2f0;}

/* ---------- Gate cards (decision gates) ---------- */
.gc-switch .gc-gates{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:18px 0 6px;}
.gc-switch .gc-gate{border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:10px;background:#fff;padding:16px 18px;}
.gc-switch .gc-gate .gc-gate-k{display:block;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:6px;}
.gc-switch .gc-gate h3{margin:0 0 6px;font-size:16.5px;}
.gc-switch .gc-gate p{margin:0;font-size:14.5px;color:var(--muted);line-height:1.62;}
.gc-switch .gc-gate p + p{margin-top:8px;}
.gc-switch .gc-gate .gc-gate-freeze{display:block;margin-top:9px;font-size:13.5px;color:var(--navy);font-weight:700;}

/* ---------- Red flags ---------- */
.gc-switch .gc-flag{display:grid;grid-template-columns:34px minmax(0,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:16px 0 6px;}
.gc-switch .gc-flag-row{grid-column:1/-1;display:grid;grid-template-columns:34px minmax(0,1fr);border-bottom:1px solid var(--line);}
.gc-switch .gc-flag-row:last-child{border-bottom:0;}
.gc-switch .gc-flag-mark{background:#fdf4f4;color:#c0392b;font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line);}
.gc-switch .gc-flag-body{padding:13px 17px;font-size:14.5px;color:var(--muted);line-height:1.62;}
.gc-switch .gc-flag-body strong{display:block;color:var(--navy);font-size:15.5px;margin-bottom:3px;}
.gc-switch .gc-flag-body em{display:block;margin-top:6px;font-style:normal;color:var(--navy);font-weight:700;font-size:13.5px;}

/* ---------- Responsibility split ---------- */
.gc-switch .gc-split{width:100%;border-collapse:collapse;margin:16px 0 6px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:14.5px;background:#fff;}
.gc-switch .gc-split th,.gc-switch .gc-split td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top;}
.gc-switch .gc-split thead th{background:var(--soft);color:var(--navy);font-weight:800;font-size:12.5px;letter-spacing:.03em;text-transform:uppercase;border-bottom:2px solid var(--line);}
.gc-switch .gc-split tbody tr:last-child td{border-bottom:0;}
.gc-switch .gc-split tbody tr:nth-child(even){background:#fafcfe;}
.gc-switch .gc-split td:first-child{font-weight:700;color:var(--navy);}

/* ---------- Cost stack strip ---------- */
.gc-switch .gc-stack{display:grid;grid-template-columns:repeat(2,1fr);gap:0 26px;margin:18px 0 6px;}
.gc-switch .gc-stack-item{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14.5px;}
.gc-switch .gc-stack-item .k{color:var(--muted);}
.gc-switch .gc-stack-item .v{color:var(--navy);font-weight:700;text-align:right;}

@media (max-width:980px){
  .gc-switch .gc-gates,.gc-switch .gc-stack{grid-template-columns:1fr;}
  .gc-switch .gc-gate{grid-template-columns:1fr;}
  .gc-switch .gc-score,.gc-switch .gc-split{font-size:13.5px;}
  .gc-switch .gc-flag-row{grid-template-columns:30px minmax(0,1fr);}
}

/* ---------- Author / reviewer byline block ---------- */
.gc-switch .gc-author{display:grid;grid-template-columns:132px minmax(0,1fr);gap:24px;align-items:start;border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:26px 28px;margin:34px 0 10px;}
.gc-switch .gc-author-photo{width:132px;height:132px;border-radius:50%;overflow:hidden;background:var(--soft);border:3px solid #fff;box-shadow:0 6px 22px rgba(15,39,71,.16);}
.gc-switch .gc-author-photo img{width:100%;height:100%;object-fit:cover;display:block;}
.gc-switch .gc-author-kicker{display:block;font-size:11.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:8px;}
.gc-switch .gc-author-name{margin:0 0 2px;font-size:20px;line-height:1.25;}
.gc-switch .gc-author-role{margin:0 0 10px;font-size:14.5px;color:var(--muted);font-weight:600;}
.gc-switch .gc-author p{margin:0 0 10px;font-size:15px;line-height:1.68;color:var(--muted);}
.gc-switch .gc-author p:last-child{margin-bottom:0;}
.gc-switch .gc-author-tags{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 12px;padding:0;list-style:none;}
.gc-switch .gc-author-tags li{font-size:12.5px;font-weight:700;color:var(--navy);background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:5px 12px;}
.gc-switch .gc-author-sign{font-size:13.5px;color:var(--muted);border-top:1px dashed var(--line);padding-top:10px;}

/* ---------- Capability table (Cpk / index explanation) ---------- */
.gc-switch .gc-cap{width:100%;border-collapse:collapse;margin:18px 0 6px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:14.5px;background:#fff;}
.gc-switch .gc-cap th,.gc-switch .gc-cap td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top;}
.gc-switch .gc-cap thead th{background:var(--soft);color:var(--navy);font-weight:800;font-size:12.5px;letter-spacing:.03em;text-transform:uppercase;border-bottom:2px solid var(--line);}
.gc-switch .gc-cap tbody tr:last-child td{border-bottom:0;}
.gc-switch .gc-cap td.idx{font-weight:800;color:var(--blue);white-space:nowrap;}
.gc-switch .gc-cap code{background:#f3f7fb;border:1px solid var(--line);border-radius:4px;padding:1px 5px;font-size:13px;}

/* ---------- Warning / boundary callout ---------- */
.gc-switch .gc-bound{border:1px solid #f0d9a8;border-left:4px solid #b57500;background:#fffaf0;border-radius:10px;padding:16px 20px;margin:18px 0 6px;}
.gc-switch .gc-bound strong{display:block;color:#7a4f00;font-size:15.5px;margin-bottom:6px;}
.gc-switch .gc-bound p{margin:0;font-size:14.5px;color:#6b5a3a;line-height:1.65;}
.gc-switch .gc-bound p + p{margin-top:8px;}

@media (max-width:980px){
  .gc-switch .gc-author{grid-template-columns:1fr;gap:16px;padding:22px 20px;}
  .gc-switch .gc-author-photo{width:104px;height:104px;}
  .gc-switch .gc-cap{font-size:13.5px;}
}

/* ---------- Alloy chooser cards ---------- */
.gc-switch .gc-alloys{display:grid;grid-template-columns:repeat(auto-fit,minmax(216px,1fr));gap:14px;margin:20px 0 8px;}
.gc-switch .gc-alloy{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:18px 20px;}
.gc-switch .gc-alloy-code{display:block;font-size:19px;font-weight:800;color:var(--navy);letter-spacing:-.01em;margin-bottom:2px;}
.gc-switch .gc-alloy-tag{display:block;font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;font-weight:800;color:var(--blue);margin-bottom:8px;}
.gc-switch .gc-alloy p{margin:0;font-size:14.5px;line-height:1.62;color:var(--muted);}
.gc-switch .gc-alloy-link{display:inline-block;margin-top:10px;font-size:14px;font-weight:700;color:var(--blue);text-decoration:none;border-bottom:1px solid transparent;}
.gc-switch .gc-alloy-link:hover{border-bottom-color:var(--blue);}

/* ---------- Volume / route ladder ---------- */
.gc-switch .gc-ladder{display:grid;gap:10px;margin:20px 0 8px;}
.gc-switch .gc-rung{display:grid;grid-template-columns:150px minmax(0,1fr);gap:16px;align-items:start;border-left:3px solid var(--line);padding:12px 0 12px 18px;}
.gc-switch .gc-rung.is-key{border-left-color:var(--blue);}
.gc-switch .gc-rung-vol{font-size:14.5px;font-weight:800;color:var(--navy);}
.gc-switch .gc-rung-vol small{display:block;font-weight:600;font-size:12.5px;color:var(--muted);letter-spacing:.02em;text-transform:none;}
.gc-switch .gc-rung-route{font-size:15px;line-height:1.62;color:var(--muted);}
.gc-switch .gc-rung-route strong{color:var(--navy);}

@media (max-width:980px){
  .gc-switch .gc-rung{grid-template-columns:1fr;gap:6px;}
}

/* ---------- Airflow / water diagram ---------- */
.gc-switch .gc-airflow{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px 14px;margin:22px 0 10px;}
.gc-switch .gc-airflow svg{display:block;width:100%;height:auto;}
.gc-switch .gc-airflow-legend{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:8px 18px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);}
.gc-switch .gc-airflow-legend span{font-size:13.5px;line-height:1.5;color:var(--muted);}
.gc-switch .gc-airflow-legend b{color:var(--navy);font-weight:700;}

/* ---------- Product scope cards ---------- */
.gc-switch .gc-prod{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:20px 0 8px;}
.gc-switch .gc-prod-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:16px 18px;}
.gc-switch .gc-prod-card h3{margin:0 0 6px;font-size:16.5px;font-weight:800;color:var(--navy);}
.gc-switch .gc-prod-card p{margin:0;font-size:14.5px;line-height:1.6;color:var(--muted);}
.gc-switch .gc-prod-card .gc-prod-route{display:block;margin-top:9px;font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;font-weight:800;color:var(--blue);}

/* ---------- Supplied CTA snippet: neutralise the wrapper paragraph margin ---------- */
.gc-switch .gc-head-cta p{ margin:0; }

/* ---------- page-specific components ---------- */
.gc-switch .gc-bound-list{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:10px;}
.gc-switch .gc-bound-list li{position:relative;padding:12px 16px 12px 42px;border:1px solid var(--line);border-radius:10px;background:#fff;}
.gc-switch .gc-bound-list li:before{content:"";position:absolute;left:16px;top:18px;width:10px;height:10px;border-radius:3px;background:var(--blue);}
.gc-switch .gc-bound-list li.no:before{background:#c0392b;}
.gc-switch .gc-formula{margin:18px 0;padding:18px 20px;border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:8px;background:var(--soft);overflow-x:auto;}
.gc-switch .gc-formula code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:15.5px;color:var(--navy);line-height:2;white-space:nowrap;}
.gc-switch .gc-calc{margin:22px 0 6px;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--shadow-sm);overflow:hidden;}
.gc-switch .gc-calc-head{padding:16px 20px;border-bottom:1px solid var(--line);background:var(--soft);}
.gc-switch .gc-calc-head h3{margin:0 0 4px;font-size:17px;}
.gc-switch .gc-calc-head p{margin:0;font-size:14px;color:var(--muted);}
.gc-switch .gc-calc-body{padding:18px 20px;display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));}
.gc-switch .gc-fields{display:grid;gap:12px;}
.gc-switch .gc-field{display:grid;gap:5px;}
.gc-switch .gc-field label{font-size:14px;font-weight:600;color:var(--navy);}
.gc-switch .gc-field input{width:100%;padding:10px 12px;font-size:16px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-family:inherit;}
.gc-switch .gc-field input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,82,204,.12);}
.gc-switch .gc-field .u{font-size:12.5px;color:var(--muted);font-weight:400;}
.gc-switch .gc-btn{appearance:none;border:none;background:#0052cc;color:#fff;font-weight:bold;font-size:16px;padding:1rem 2.5rem;border-radius:6px;cursor:pointer;font-family:inherit;}
.gc-switch .gc-btn:hover{background:#0043a8;}
.gc-switch .gc-out{display:grid;gap:12px;align-content:start;}
.gc-switch .gc-out-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--soft);}
.gc-switch .gc-out-row .k{font-size:14px;color:var(--muted);}
.gc-switch .gc-out-row .v{font-size:19px;font-weight:700;color:var(--navy);font-variant-numeric:tabular-nums;}
.gc-switch .gc-verdict{padding:14px 16px;border-radius:10px;border:1px solid var(--line);background:#fff;}
.gc-switch .gc-verdict strong{display:block;font-size:15px;margin-bottom:4px;color:var(--navy);}
.gc-switch .gc-verdict p{margin:0;font-size:14px;color:var(--muted);}
.gc-switch .gc-verdict.mold{border-color:#1f7a4d;background:#f2fbf6;}
.gc-switch .gc-verdict.cnc{border-color:#b8860b;background:#fdf9ef;}
.gc-switch .gc-verdict.none{border-color:#c0392b;background:#fdf3f2;}
.gc-switch .gc-err{margin:0;font-size:14px;color:#c0392b;}

.gc-switch .gc-cta p:has(> a[href^="javascript"]){ margin:0; }
/* cta-wrap-reset */

/* ---------- Concept table emphasis ---------- */
.gc-switch .gc-table td code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px;background:#f0f4f9;padding:1px 5px;border-radius:4px;color:var(--navy);}
/* ---------- Unused fastener card block retained for scope compatibility ---------- */
.gc-switch .gc-screws{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;margin:20px 0 8px;}
.gc-switch .gc-screw{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;}
.gc-switch .gc-screw h3{margin:0 0 6px;font-size:15.5px;color:var(--navy);}
.gc-switch .gc-screw p{margin:0;font-size:14.5px;line-height:1.6;color:var(--muted);}
.gc-switch .gc-screw .gc-screw-tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.02em;color:var(--blue);text-transform:uppercase;margin-bottom:6px;}
/* ---------- Thread callout strip ---------- */
.gc-switch .gc-thread-strip{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0 6px;}
.gc-switch .gc-thread-strip > div{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:var(--soft);}
.gc-switch .gc-thread-strip h4{margin:0 0 8px;font-size:14.5px;color:var(--navy);}
.gc-switch .gc-thread-strip ul{margin:0;padding-left:18px;}
.gc-switch .gc-thread-strip li{font-size:14.5px;line-height:1.6;color:var(--muted);margin:4px 0;}
/* cta-wrap-reset marker */

/* ---------- shared fallback classes (used by the page markup) ---------- */
.gc-switch .gc-section-label{display:block;margin:0 0 12px;font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);}
.gc-switch .gc-head-media img{border-radius:12px;box-shadow:var(--shadow-sm);}
.gc-switch .gc-note-inline{margin:16px 0 6px;padding:12px 16px;font-size:15px;line-height:1.65;color:var(--muted);background:var(--soft);border-left:3px solid var(--blue);border-radius:0 10px 10px 0;}
/* shared-fallback-classes */


/* ---------- Component family cards ---------- */
.gc-switch .gc-parts{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:14px;margin:20px 0 8px;}
.gc-switch .gc-part{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;}
.gc-switch .gc-part h3{margin:0 0 6px;font-size:15.5px;color:var(--navy);}
.gc-switch .gc-part p{margin:0;font-size:14.5px;line-height:1.6;color:var(--muted);}
.gc-switch .gc-part .gc-part-role{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.02em;color:var(--blue);text-transform:uppercase;margin-bottom:6px;}
/* ---------- Boundary callout ---------- */
.gc-switch .gc-bound-list{margin:14px 0 0;padding:0;list-style:none;}
.gc-switch .gc-bound-list li{position:relative;margin:0 0 10px;padding-left:20px;font-size:15px;line-height:1.62;}
.gc-switch .gc-bound-list li:before{content:"\2022";position:absolute;left:4px;color:var(--blue);font-weight:700;}
/* ---------- shared fallback classes (used by the page markup) ---------- */
.gc-switch .gc-section-label{display:block;margin:0 0 12px;font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);}
.gc-switch .gc-head-media img{border-radius:12px;box-shadow:var(--shadow-sm);}
.gc-switch .gc-note-inline{margin:16px 0 6px;padding:12px 16px;font-size:15px;line-height:1.65;color:var(--muted);background:var(--soft);border-left:3px solid var(--blue);border-radius:0 10px 10px 0;}
/* bumper-sheet */

/* ---------- Three-tier "how to read a figure" cards ---------- */
.gc-switch .gc-tiers{display:grid;grid-template-columns:repeat(auto-fit,minmax(198px,1fr));gap:14px;margin:20px 0 8px;}
.gc-switch .gc-tier{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;}
.gc-switch .gc-tier .gc-tier-n{display:block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);margin-bottom:6px;}
.gc-switch .gc-tier h3{margin:0 0 6px;font-size:15.5px;color:var(--navy);}
.gc-switch .gc-tier p{margin:0;font-size:14.5px;line-height:1.6;color:var(--muted);}
/* ---------- Source attribution line under a cited figure ---------- */
.gc-switch .gc-src{display:block;margin:12px 0 0;padding-left:14px;border-left:2px solid var(--line);font-size:13.5px;line-height:1.6;color:var(--muted);}
.gc-switch .gc-src a{color:var(--blue);text-decoration:none;}
.gc-switch .gc-src a:hover{text-decoration:underline;}
/* ---------- Verdict strip: principle / range / must-confirm ---------- */
.gc-switch .gc-verdict{margin:14px 0 0;padding:0;list-style:none;font-size:15px;}
.gc-switch .gc-verdict li{position:relative;margin:0 0 9px;padding-left:22px;line-height:1.62;}
.gc-switch .gc-verdict li:before{content:"\2192";position:absolute;left:2px;color:var(--blue);font-weight:700;}
/* ---------- shared fallback classes ---------- */
.gc-switch .gc-section-label{display:block;margin:0 0 12px;font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);}
.gc-switch .gc-head-media img{border-radius:12px;box-shadow:var(--shadow-sm);}
.gc-switch .gc-note-inline{margin:16px 0 6px;padding:12px 16px;font-size:15px;line-height:1.65;color:var(--muted);background:var(--soft);border-left:3px solid var(--blue);border-radius:0 10px 10px 0;}
/* stamp-sheet */