/* GridCircuits — "precision light" design system */
:root {
  --gc-ink: #0b1220;
  --gc-text: #1e293b;
  --gc-muted: #475569;
  --gc-faint: #64748b;
  --gc-line: #e2e8f0;
  --gc-line-2: #cbd5e1;
  --gc-page: #f8fafc;
  --gc-card: #ffffff;
  --gc-accent: #2563eb;
  --gc-accent-ink: #1d4ed8;
  --gc-accent-soft: #eff6ff;
  --gc-pass: #059669;
  --gc-pass-soft: #ecfdf5;
  --gc-warn: #b45309;
  --gc-warn-soft: #fffbeb;
  --gc-fail: #dc2626;
  --gc-fail-soft: #fef2f2;
  --gc-power: #2563eb;
  --gc-design: #7c3aed;
  --gc-electronics: #0891b2;
  --gc-renewables: #16a34a;
  --gc-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --gc-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --gc-radius: 10px;
}

/* ---------- Site chrome (Kadence) ---------- */
body { background: var(--gc-page); }
.site-header-wrap, #masthead .site-header-row-container-inner { background: #fff; }
#masthead { border-bottom: 1px solid var(--gc-line); }
.site-branding .site-title { font-family: var(--gc-sans); font-weight: 800; letter-spacing: -0.02em; color: var(--gc-ink); }
.site-branding .site-title::before { content: ""; display: inline-block; width: 10px; height: 10px; margin-right: 8px; border-radius: 2px; background: var(--gc-accent); box-shadow: 4px 4px 0 var(--gc-ink); vertical-align: 2px; }
.header-navigation .menu > li > a { font-weight: 600; color: var(--gc-text); }
.header-navigation .menu > li > a:hover, .header-navigation .menu > li.current-menu-item > a { color: var(--gc-accent); }
.gc-has-page .entry-hero, .gc-has-page .page-hero-section, .gc-has-page .entry-content-wrap > .entry-header { display: none !important; }
.gc-has-page .content-area { margin-top: 0; }
.gc-has-page .entry.single-entry { box-shadow: none; background: transparent; }

/* ---------- Base ---------- */
.gc-page { max-width: 1180px; margin: 0 auto; padding: 8px 20px 72px; color: var(--gc-text); font-family: var(--gc-sans); font-size: 16px; line-height: 1.6; }
.gc-page *, .gc-page *::before, .gc-page *::after { box-sizing: border-box; }
.gc-page h1, .gc-page h2, .gc-page h3 { color: var(--gc-ink); letter-spacing: -0.015em; line-height: 1.2; margin: 0; font-family: var(--gc-sans); }
.gc-page p { margin: 0 0 0.8em; }
.gc-page a { color: var(--gc-accent); }
.gc-page code { font-family: var(--gc-mono); font-size: 0.92em; background: #f1f5f9; border: 1px solid var(--gc-line); border-radius: 4px; padding: 1px 5px; color: var(--gc-ink); }
.gc-ico { width: 1.1em; height: 1.1em; flex: none; }
.gc-muted { color: var(--gc-muted); }
.screen-reader-text { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.gc-crumbs { display: flex; flex-wrap: wrap; gap: 6px; font-size: 13px; color: var(--gc-faint); margin: 18px 0 14px; }
.gc-crumbs a { color: var(--gc-faint); text-decoration: none; }
.gc-crumbs a:hover { color: var(--gc-accent); }
.gc-page .gc-eyebrow { font-family: var(--gc-mono); font-size: 12px !important; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gc-accent); margin: 0 0 10px !important; }
.gc-head { padding: 4px 0 18px; border-bottom: 1px solid var(--gc-line); margin-bottom: 22px; }
.gc-head h1 { font-size: clamp(1.75rem, 3.4vw, 2.4rem); font-weight: 800; }
.gc-lede { max-width: 760px; color: var(--gc-muted); font-size: 1.06rem; margin: 12px 0 0 !important; }
.gc-std-line { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 13px; color: var(--gc-muted); margin: 0 0 18px !important; font-family: var(--gc-mono); }

.gc-tag { display: inline-flex; align-items: center; gap: 6px; font-family: var(--gc-mono); font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 8px; border-radius: 4px; background: #f1f5f9; color: var(--gc-muted); border: 1px solid var(--gc-line); }
.gc-tag::before { content: ""; width: 6px; height: 6px; border-radius: 1px; background: currentColor; }
.gc-tag-power { color: var(--gc-power); background: #eff6ff; border-color: #dbeafe; }
.gc-tag-design { color: var(--gc-design); background: #f5f3ff; border-color: #ede9fe; }
.gc-tag-electronics { color: var(--gc-electronics); background: #ecfeff; border-color: #cffafe; }
.gc-tag-renewables { color: var(--gc-renewables); background: #f0fdf4; border-color: #dcfce7; }

.gc-btn { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 8px; border: 1px solid var(--gc-accent); background: var(--gc-accent); color: #fff !important; font: 600 14px/1.2 var(--gc-sans); text-decoration: none !important; cursor: pointer; }
.gc-btn:hover { background: var(--gc-accent-ink); }
.gc-btn-ghost { background: #fff; color: var(--gc-text) !important; border-color: var(--gc-line-2); }
.gc-btn-ghost:hover { background: #f8fafc; border-color: var(--gc-accent); color: var(--gc-accent) !important; }
.gc-btn:focus-visible, .gc-page a:focus-visible, .gc-page input:focus-visible, .gc-page select:focus-visible { outline: 3px solid rgba(37, 99, 235, .35); outline-offset: 1px; }

/* ---------- Home ---------- */
.gc-hero { position: relative; isolation: isolate; padding: 48px 0 28px; border-bottom: 1px solid var(--gc-line); }
.gc-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; background-image: linear-gradient(var(--gc-line) 1px, transparent 1px), linear-gradient(90deg, var(--gc-line) 1px, transparent 1px); background-size: 28px 28px; background-position: -1px -1px; -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.9), transparent 85%); mask-image: linear-gradient(180deg, rgba(0,0,0,.9), transparent 85%); }
.gc-hero h1 { font-size: clamp(2rem, 5vw, 3.3rem); font-weight: 800; max-width: 860px; letter-spacing: -0.03em; }
.gc-search { position: relative; display: flex; align-items: center; max-width: 680px; margin-top: 24px; background: #fff; border: 1px solid var(--gc-line-2); border-radius: 10px; box-shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 8px 24px rgba(15, 23, 42, .06); }
.gc-search .gc-ico { position: absolute; left: 14px; color: var(--gc-faint); width: 20px; height: 20px; }
.gc-search input { width: 100%; height: 52px; border: 0; background: transparent; padding: 0 48px 0 44px; font: 16px var(--gc-sans); color: var(--gc-ink); outline: none; }
.gc-search kbd { position: absolute; right: 12px; font-family: var(--gc-mono); font-size: 12px; color: var(--gc-faint); border: 1px solid var(--gc-line-2); border-radius: 4px; padding: 1px 6px; }
.gc-search-sm { margin: 0 0 8px; }
.gc-search-sm input { height: 44px; }
.gc-trust { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; margin: 18px 0 0; padding: 0; font-size: 14px; color: var(--gc-muted); }
.gc-trust li { display: inline-flex; align-items: center; gap: 6px; margin: 0; }
.gc-trust .gc-ico { color: var(--gc-pass); }

.gc-disciplines { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; margin-top: 28px; }
.gc-disc { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 18px; background: #fff; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); color: var(--gc-text) !important; text-decoration: none !important; transition: border-color .15s, box-shadow .15s; }
.gc-disc:hover { border-color: var(--gc-line-2); box-shadow: 0 6px 20px rgba(15, 23, 42, .07); }
.gc-disc strong { color: var(--gc-ink); font-size: 16px; }
.gc-disc > span:not(.gc-disc-icon) { font-size: 14px; color: var(--gc-muted); line-height: 1.5; }
.gc-disc em { font-style: normal; font-family: var(--gc-mono); font-size: 12px; color: var(--gc-faint); margin-top: auto; }
.gc-disc-icon { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: #f1f5f9; color: var(--gc-ink); margin-right: 8px; vertical-align: middle; }
.gc-disc-power .gc-disc-icon, .gc-disc-icon.gc-disc-power { background: #eff6ff; color: var(--gc-power); }
.gc-disc-design .gc-disc-icon, .gc-disc-icon.gc-disc-design { background: #f5f3ff; color: var(--gc-design); }
.gc-disc-electronics .gc-disc-icon, .gc-disc-icon.gc-disc-electronics { background: #ecfeff; color: var(--gc-electronics); }
.gc-disc-renewables .gc-disc-icon, .gc-disc-icon.gc-disc-renewables { background: #f0fdf4; color: var(--gc-renewables); }

.gc-section { margin-top: 44px; }
.gc-section > h2, .gc-section-head h2 { font-size: 1.35rem; font-weight: 800; display: flex; align-items: center; }
.gc-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--gc-line); }
.gc-section-head a { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: 14px; text-decoration: none; }

.gc-page .gc-cards { display: grid; gap: 12px; }
.gc-page .gc-cards-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gc-page .gc-card { display: flex; flex-direction: column; gap: 8px; padding: 16px 18px; background: #fff; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); color: var(--gc-text) !important; text-decoration: none !important; transition: border-color .15s, box-shadow .15s, transform .15s; }
a.gc-card:hover { border-color: var(--gc-accent); box-shadow: 0 6px 20px rgba(37, 99, 235, .10); transform: translateY(-1px); }
.gc-page .gc-card[hidden] { display: none; }
.gc-page .gc-card strong { color: var(--gc-ink); font-size: 16px; line-height: 1.3; }
.gc-page .gc-card-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.gc-page .gc-card-std { font-family: var(--gc-mono); font-size: 11px; color: var(--gc-faint); text-align: right; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.gc-page .gc-card-desc { font-size: 14px; color: var(--gc-muted); }
.gc-page .gc-card-go { display: inline-flex; align-items: center; gap: 6px; margin-top: auto; padding-top: 4px; font-size: 13px; font-weight: 600; color: var(--gc-accent); }
.gc-page .gc-card-planned { background: transparent; border-style: dashed; }
.gc-page .gc-card-planned strong { color: var(--gc-muted); font-weight: 600; }
.gc-soon { font-family: var(--gc-mono); font-size: 11px; color: var(--gc-faint); }
.gc-empty { margin-top: 12px; color: var(--gc-muted); }

.gc-lib { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.gc-lib-item { display: flex; flex-direction: column; gap: 6px; padding: 18px; background: #fff; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); color: var(--gc-text) !important; text-decoration: none !important; }
.gc-lib-item:hover { border-color: var(--gc-accent); }
.gc-lib-item .gc-ico { width: 22px; height: 22px; color: var(--gc-accent); }
.gc-lib-item strong { color: var(--gc-ink); }
.gc-lib-item span { font-size: 14px; color: var(--gc-muted); }

/* ---------- Calculator ---------- */
.gc-calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.gc-panel { background: #fff; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); padding: 18px; box-shadow: 0 1px 2px rgba(15, 23, 42, .04); }
.gc-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.gc-panel-head h2 { font-size: 13px; font-family: var(--gc-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--gc-muted); font-weight: 700; }
.gc-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.gc-field { display: flex; flex-direction: column; gap: 5px; margin: 0; }
.gc-field[hidden] { display: none; }
.gc-field label { font-size: 13px; font-weight: 600; color: var(--gc-muted); margin: 0; }
.gc-field select, .gc-field input { width: 100%; height: 40px; border: 1px solid var(--gc-line-2); border-radius: 7px; background: #fff; color: var(--gc-ink); padding: 0 10px; font: 15px var(--gc-sans); margin: 0; box-shadow: none; }
.gc-field input { font-family: var(--gc-mono); }
.gc-field select:focus, .gc-field input:focus { border-color: var(--gc-accent); outline: 3px solid rgba(37, 99, 235, .15); }
.gc-input-unit { position: relative; display: flex; }
.gc-input-unit input { padding-right: 64px; }
.gc-unit { position: absolute; right: 1px; top: 1px; bottom: 1px; display: grid; place-items: center; min-width: 52px; padding: 0 8px; background: #f8fafc; border-left: 1px solid var(--gc-line); border-radius: 0 6px 6px 0; font-family: var(--gc-mono); font-size: 12px; color: var(--gc-muted); }
.gc-seg { display: inline-flex; padding: 3px; background: #f1f5f9; border: 1px solid var(--gc-line); border-radius: 8px; }
.gc-seg label { margin: 0; }
.gc-seg input { position: absolute; opacity: 0; pointer-events: none; }
.gc-seg span { display: block; padding: 5px 10px; border-radius: 6px; font: 600 12px var(--gc-mono); color: var(--gc-muted); cursor: pointer; }
.gc-seg input:checked + span { background: #fff; color: var(--gc-accent); box-shadow: 0 1px 3px rgba(15, 23, 42, .12); }
.gc-seg input:focus-visible + span { outline: 2px solid var(--gc-accent); }

.gc-page .gc-results { position: sticky; top: 16px; border-top: 3px solid var(--gc-accent); }
.gc-page .gc-status { font: 700 12px var(--gc-mono); padding: 3px 9px; border-radius: 999px; text-transform: uppercase; letter-spacing: .05em; }
.gc-page .gc-status.is-pass { background: var(--gc-pass-soft); color: var(--gc-pass); }
.gc-page .gc-status.is-warn { background: var(--gc-warn-soft); color: var(--gc-warn); }
.gc-page .gc-status.is-fail { background: var(--gc-fail-soft); color: var(--gc-fail); }
.gc-page .gc-out { margin: 0; }
.gc-page .gc-out-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px dashed var(--gc-line); }
.gc-page .gc-out-row:last-child { border-bottom: 0; }
.gc-page .gc-out-row dt { font-size: 14px; color: var(--gc-muted); margin: 0; }
.gc-page .gc-out-row dd { margin: 0; text-align: right; font-family: var(--gc-mono); color: var(--gc-ink); white-space: nowrap; }
.gc-page .gc-out-row dd b { font-weight: 600; font-size: 15px; }
.gc-page .gc-out-row dd span { font-size: 12px; color: var(--gc-faint); }
.gc-page .gc-out-row.is-primary dd b { font-size: 22px; font-weight: 700; color: var(--gc-ink); }
.gc-page .gc-out-row.is-primary dt { color: var(--gc-text); font-weight: 600; }
.gc-page .gc-out-error { padding: 12px; border-radius: 8px; background: var(--gc-warn-soft); color: var(--gc-warn); font-size: 14px; }
.gc-page .gc-notes p { font-size: 13px; color: var(--gc-muted); margin: 10px 0 0 !important; padding-left: 10px; border-left: 2px solid var(--gc-line-2); }
.gc-page .gc-out-actions { display: flex; gap: 8px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--gc-line); }
.gc-page .gc-out-actions .gc-btn { padding: 7px 12px; font-size: 13px; }

.gc-disclaimer { display: flex; gap: 10px; margin: 16px 0 0; padding: 12px 14px; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); background: #fff; font-size: 13px; color: var(--gc-muted); }
.gc-disclaimer p { margin: 0 !important; }
.gc-disclaimer .gc-ico { color: var(--gc-faint); margin-top: 2px; }

.gc-page .gc-explain { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; margin-top: 28px; }
.gc-block { background: #fff; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); padding: 20px 22px; }
.gc-block > h2 { font-size: 1.12rem; font-weight: 800; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--gc-line); }
.gc-block ul { margin: 0 0 0 1.2em; padding: 0; }
.gc-block li { margin: 0 0 6px; }
.gc-formula p { font-size: 16px; }
.gc-formula code { font-size: 15px; padding: 3px 8px; }
.gc-verified { font-family: var(--gc-mono); font-size: 12px; color: var(--gc-faint); margin-top: 12px !important; }
.gc-faq details { border-bottom: 1px solid var(--gc-line); padding: 2px 0; }
.gc-faq details:last-child { border-bottom: 0; }
.gc-faq summary { cursor: pointer; padding: 10px 0; font-weight: 600; color: var(--gc-ink); list-style: none; position: relative; padding-right: 24px; }
.gc-faq summary::-webkit-details-marker { display: none; }
.gc-faq summary::after { content: "+"; position: absolute; right: 2px; font-family: var(--gc-mono); color: var(--gc-accent); }
.gc-faq details[open] summary::after { content: "−"; }
.gc-faq p { color: var(--gc-muted); }

/* ---------- Tables, downloads, lists ---------- */
.gc-table-wrap { overflow-x: auto; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); background: #fff; }
.gc-table { width: 100%; border-collapse: collapse; margin: 0; font-size: 14px; }
.gc-table th { text-align: left; font: 700 12px var(--gc-mono); text-transform: uppercase; letter-spacing: .05em; color: var(--gc-muted); background: #f8fafc; padding: 10px 14px; border-bottom: 1px solid var(--gc-line); }
.gc-table td { padding: 8px 14px; border-bottom: 1px solid var(--gc-line); font-family: var(--gc-mono); color: var(--gc-ink); }
.gc-table tr:last-child td { border-bottom: 0; }
.gc-table tbody tr:hover td { background: #f8fafc; }
.gc-table-formulas td:first-child { font-family: var(--gc-sans); color: var(--gc-text); }
.gc-table-formulas code { background: none; border: 0; padding: 0; }

.gc-dl-list { display: grid; gap: 10px; }
.gc-dl { display: flex; align-items: center; gap: 14px; padding: 16px 18px; background: #fff; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); color: var(--gc-text) !important; text-decoration: none !important; }
.gc-dl:hover { border-color: var(--gc-accent); }
.gc-dl > .gc-ico { width: 22px; height: 22px; color: var(--gc-accent); }
.gc-dl > span { display: flex; flex-direction: column; flex: 1; }
.gc-dl strong { color: var(--gc-ink); }
.gc-dl > span > span { font-size: 14px; color: var(--gc-muted); }
.gc-dl em { font-style: normal; font: 600 11px var(--gc-mono); color: var(--gc-faint); text-transform: uppercase; }
.gc-planned { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.gc-planned li { padding: 12px 14px; border: 1px dashed var(--gc-line-2); border-radius: 8px; color: var(--gc-muted); margin: 0; }
.gc-planned li b { color: var(--gc-ink); }
.gc-prose { max-width: 820px; }
.gc-prose ul { margin: 0 0 1em 1.2em; }

/* ---------- Articles (Kadence posts) ---------- */
.single-post .entry-content { font-size: 17px; line-height: 1.7; color: var(--gc-text); }
.single-post .entry-content h2 { font-size: 1.45rem; margin-top: 1.8em; letter-spacing: -0.01em; }
.single-post .entry-content code { font-family: var(--gc-mono); background: #f1f5f9; padding: 1px 5px; border-radius: 4px; }
.single-post .entry-content table { font-size: 15px; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .gc-disciplines, .gc-lib { grid-template-columns: repeat(2, 1fr); }
  .gc-page .gc-cards-3 { grid-template-columns: repeat(2, 1fr); }
  .gc-calc { grid-template-columns: 1fr; }
  .gc-page .gc-results { position: static; }
}
@media (max-width: 600px) {
  .gc-page { padding: 4px 16px 56px; }
  .gc-hero { padding-top: 28px; }
  .gc-disciplines, .gc-lib, .gc-page .gc-cards-3, .gc-fields { grid-template-columns: 1fr; }
  .gc-search kbd { display: none; }
  .gc-page .gc-card-std { display: none; }
  .gc-block { padding: 16px; }
}

/* ---------- Print: results sheet ---------- */
@media print {
  #masthead, .site-footer, .gc-crumbs, .gc-page .gc-out-actions, .gc-seg, .gc-page .gc-explain .gc-block:last-child, .gc-faq, #wpadminbar { display: none !important; }
  body, .gc-page { background: #fff !important; }
  .gc-calc { grid-template-columns: 1fr 1fr; }
  .gc-panel, .gc-block { box-shadow: none; border-color: #999; break-inside: avoid; }
  .gc-page .gc-results { position: static; }
  .gc-page a { color: #000; text-decoration: none; }
}

/* Overflow guards */
.gc-page .gc-card, .gc-block, .gc-panel, .gc-disc, .gc-lib-item { min-width: 0; }
.gc-block code { white-space: normal; overflow-wrap: anywhere; }
.gc-page .gc-card-top .gc-tag { flex: none; }
.gc-page .gc-card-std { min-width: 0; }

/* Kadence form-field overrides */
.gc-page .gc-search input[type="search"] { padding: 0 48px 0 44px !important; border: 0 !important; box-shadow: none !important; background: transparent !important; border-radius: 10px; }
.gc-page .gc-search-sm input[type="search"] { height: 44px; }
.gc-page .gc-field input[type="number"], .gc-page .gc-field select { box-shadow: none; }

/* ---------- Disciplines (substation focus) ---------- */
:root { --gc-automation: #2563eb; --gc-protection: #c2410c; --gc-scada: #7c3aed; --gc-grid: #0e7490; --gc-fundamentals: #475569; }
.gc-tag-automation { color: var(--gc-automation); background: #eff6ff; border-color: #dbeafe; }
.gc-tag-protection { color: var(--gc-protection); background: #fff7ed; border-color: #ffedd5; }
.gc-tag-scada { color: var(--gc-scada); background: #f5f3ff; border-color: #ede9fe; }
.gc-tag-grid { color: var(--gc-grid); background: #ecfeff; border-color: #cffafe; }
.gc-tag-fundamentals { color: var(--gc-fundamentals); background: #f1f5f9; border-color: #e2e8f0; }
.gc-disc-automation .gc-disc-icon, .gc-disc-icon.gc-disc-automation { background: #eff6ff; color: var(--gc-automation); }
.gc-disc-protection .gc-disc-icon, .gc-disc-icon.gc-disc-protection { background: #fff7ed; color: var(--gc-protection); }
.gc-disc-scada .gc-disc-icon, .gc-disc-icon.gc-disc-scada { background: #f5f3ff; color: var(--gc-scada); }
.gc-disc-grid .gc-disc-icon, .gc-disc-icon.gc-disc-grid { background: #ecfeff; color: var(--gc-grid); }
.gc-disc-fundamentals .gc-disc-icon, .gc-disc-icon.gc-disc-fundamentals { background: #f1f5f9; color: var(--gc-fundamentals); }

/* Flagship band */
.gc-flagship { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 28px; align-items: center; margin-top: 36px; padding: 28px; border-radius: 14px; background: #0b1220; color: #cbd5e1; background-image: linear-gradient(rgba(148,163,184,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(148,163,184,.08) 1px, transparent 1px); background-size: 24px 24px; }
.gc-page .gc-flagship h2 { color: #fff; font-size: 1.6rem; font-weight: 800; margin: 0 0 10px; }
.gc-page .gc-flagship .gc-eyebrow { color: #60a5fa; }
.gc-flagship p { color: #cbd5e1; }
.gc-flagship ul { margin: 0 0 18px 1.1em; padding: 0; color: #e2e8f0; font-size: 14px; }
.gc-flagship li { margin: 0 0 4px; }
.gc-flow { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; counter-reset: none; }
.gc-flow li { position: relative; display: flex; align-items: center; gap: 12px; margin: 0; padding: 12px 14px; border: 1px solid rgba(148,163,184,.3); border-radius: 10px; background: rgba(15,23,42,.6); color: #f8fafc; font: 600 14px var(--gc-mono); }
.gc-flow li span { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 6px; background: #2563eb; color: #fff; font-size: 12px; flex: none; }
.gc-flow li + li::before { content: ""; position: absolute; left: 25px; top: -11px; width: 2px; height: 10px; background: #2563eb; }

/* Time-current plot */
.gc-plot { margin-top: 14px; border: 1px solid var(--gc-line); border-radius: 8px; padding: 8px; background: #fff; }
.gc-plot[hidden] { display: none; }
.gc-plot svg { display: block; width: 100%; height: auto; font: 10.5px var(--gc-mono); fill: var(--gc-faint); }
.gc-plot-grid line { stroke: #eef2f7; stroke-width: 1; }
.gc-plot-grid line.major { stroke: #cbd5e1; }
.gc-plot-axis { fill: var(--gc-muted); font-weight: 600; }
.gc-plot-curve { fill: none; stroke: var(--gc-accent); stroke-width: 2.2; }
.gc-plot-guide { stroke: var(--gc-protection); stroke-width: 1; stroke-dasharray: 3 3; }
.gc-plot-dot { fill: var(--gc-protection); stroke: #fff; stroke-width: 2; }
.gc-plot-label { fill: var(--gc-ink); font-weight: 700; }
@media (max-width: 980px) { .gc-disciplines { grid-template-columns: repeat(2, minmax(0, 1fr)); } .gc-flagship { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .gc-disciplines { grid-template-columns: 1fr; } .gc-flagship { padding: 20px; } }

/* ---------- Brand line-art heroes (v1.3) ---------- */
.gc-hero-art { margin: 0; min-width: 0; pointer-events: none; }
.gc-hero-art img { display: block; width: 100%; height: auto; }
.gc-page .gc-hero-split { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: 32px; align-items: center; }
.gc-page .gc-hero-split .gc-hero-text { min-width: 0; }
.gc-page .gc-hero-split h1 { font-size: clamp(2rem, 4.2vw, 3rem); }
.gc-hero-art-home { margin: -12px -8px -8px 0; }
.gc-page .gc-head-art { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr); gap: 32px; align-items: center; }
.gc-page .gc-head-art .gc-head-text { min-width: 0; }
.gc-head-art .gc-hero-art { max-width: 440px; justify-self: end; width: 100%; }
@media (max-width: 980px) {
  .gc-page .gc-hero-split, .gc-page .gc-head-art { grid-template-columns: 1fr; gap: 20px; }
  .gc-hero-art-home { margin: 4px auto 0; max-width: 520px; width: 100%; }
  .gc-head-art .gc-hero-art { justify-self: start; max-width: 360px; }
}
@media (max-width: 600px) {
  .gc-head-art .gc-hero-art { display: none; }
  .gc-hero-art-home { max-width: 420px; }
}

/* ---------- Home: reference one-line (v1.4) ---------- */
.gc-page .gc-sld { margin-top: 28px; }
.gc-sld-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: 20px; align-items: start; }
.gc-sld-fig { margin: 0; background: #fff; border: 1px solid var(--gc-line); border-radius: 12px; padding: 14px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.gc-sld-fig svg { display: block; width: 100%; min-width: 760px; height: auto; }
.gc-sld-key { background: #fff; border: 1px solid var(--gc-line); border-radius: 12px; padding: 16px 18px; font-size: 13px; }
.gc-page .gc-sld-key h3 { font-size: 12px; font-family: var(--gc-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--gc-faint); margin: 0 0 10px; }
.gc-page .gc-sld-key h3:not(:first-child) { margin-top: 16px; }
.gc-sld-sym { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.gc-sld-sym li { display: flex; align-items: center; gap: 10px; color: var(--gc-text); }
.gc-sld-sym i { flex: none; width: 22px; height: 14px; display: inline-block; position: relative; }
.gc-sld-sym .k-52 { width: 14px; height: 14px; margin: 0 4px; background: #2563eb; border-radius: 2px; }
.gc-sld-sym .k-52o { width: 14px; height: 14px; margin: 0 4px; border: 2px solid #2563eb; border-radius: 2px; box-sizing: border-box; }
.gc-sld-sym .k-ct { width: 14px; height: 14px; margin: 0 4px; border: 2px solid #0b1220; border-radius: 50%; box-sizing: border-box; }
.gc-sld-sym .k-vt { background: linear-gradient(135deg, transparent 40%, #0b1220 40% 55%, transparent 55%) 0 0/6px 6px repeat-x, linear-gradient(#0b1220, #0b1220) 0 8px/100% 2px no-repeat, linear-gradient(#0b1220, #0b1220) 0 11px/100% 2px no-repeat; }
.gc-sld-sym .k-pri { height: 3px; background: #0b1220; }
.gc-sld-sym .k-sec { height: 0; border-top: 2px dashed #c2410c; }
.gc-sld-key dl { margin: 0; display: grid; gap: 5px; }
.gc-sld-key dl div { display: grid; grid-template-columns: 68px 1fr; gap: 8px; }
.gc-sld-key dt { font-family: var(--gc-mono); font-weight: 700; color: #c2410c; font-size: 12px; }
.gc-sld-key dd { margin: 0; color: var(--gc-muted); line-height: 1.4; }
.gc-page .gc-sld-note { font-size: 12.5px; color: var(--gc-faint); margin: 10px 0 0; }
@media (max-width: 980px) { .gc-sld-wrap { grid-template-columns: 1fr; } .gc-sld-key dl { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .gc-sld-key dl { grid-template-columns: 1fr; } }
.gc-sld .gc-section-head { flex-wrap: wrap; gap: 8px 16px; }
.gc-sld .gc-section-head > a { white-space: nowrap; }
@media (min-width: 981px) { .gc-sld-wrap { grid-template-columns: minmax(0, 1fr) 250px; } }

/* ---------- Home hero: ring-bus one-line with fade (v1.4.1) ---------- */
.gc-hero-sld { margin: -24px -12px -18px 0; }
.gc-hero-sld svg { display: block; width: 100%; height: auto; }
.gc-hero-sld {
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.35) 14%, #000 40%), linear-gradient(180deg, #000 82%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.35) 14%, #000 40%), linear-gradient(180deg, #000 82%, transparent 100%);
  mask-composite: intersect;
}
@media (max-width: 980px) {
  .gc-hero-sld { margin: 0 auto; max-width: 560px; width: 100%;
    -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 18%, #000 82%, transparent 100%); mask-image: linear-gradient(180deg, transparent 0%, #000 18%, #000 82%, transparent 100%); }
}

/* ---------- Contributor program (v1.5) ---------- */
.gc-page .gc-notice { margin: 0 0 18px; padding: 12px 16px; border: 1px solid var(--gc-line-2); border-radius: 10px; background: #fff; font-size: 15px; }
.gc-page .gc-notice.is-pass { border-color: #a7f3d0; background: var(--gc-pass-soft); }
.gc-page .gc-notice.is-fail { border-color: #fecaca; background: var(--gc-fail-soft); }
.gc-page .gc-small { font-size: 12.5px; }
.gc-page .gc-benefit .gc-ico { width: 22px; height: 22px; color: var(--gc-accent); }
.gc-page .gc-rules { margin: 0; padding-left: 20px; display: grid; gap: 8px; max-width: 860px; }
.gc-page .gc-rules b { color: var(--gc-ink); }
.gc-topics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.gc-topic { display: flex; flex-direction: column; gap: 8px; padding: 14px 16px; background: #fff; border: 1px solid var(--gc-line); border-radius: var(--gc-radius); min-width: 0; }
.gc-topic.is-taken { opacity: .6; border-style: dashed; }
.gc-topic strong { color: var(--gc-ink); line-height: 1.35; font-size: 15px; }
.gc-topic-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.gc-topic-st { font: 500 11px var(--gc-mono); color: var(--gc-faint); text-transform: uppercase; letter-spacing: .06em; }
.gc-topic .gc-card-desc { font-size: 13.5px; color: var(--gc-muted); flex: 1; }
.gc-topic-go { font-weight: 600; font-size: 14px; display: inline-flex; gap: 6px; align-items: center; }
.gc-topic form { margin: 0; }
.gc-btn-sm { padding: 6px 11px; font-size: 13px; }
.gc-form { max-width: 860px; display: grid; gap: 14px; background: #fff; border: 1px solid var(--gc-line); border-radius: 12px; padding: 22px; }
.gc-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.gc-ff { display: grid; gap: 6px; font-size: 14px; color: var(--gc-text); font-weight: 600; }
.gc-ff em { color: var(--gc-fail); font-style: normal; }
.gc-page .gc-ff input, .gc-page .gc-ff select, .gc-page .gc-ff textarea { width: 100%; border: 1px solid var(--gc-line-2) !important; border-radius: 8px !important; padding: 9px 11px !important; font: 400 15px var(--gc-sans) !important; color: var(--gc-ink); background: #fff !important; box-shadow: none !important; margin: 0; }
.gc-page .gc-ff input:focus, .gc-page .gc-ff select:focus, .gc-page .gc-ff textarea:focus { border-color: var(--gc-accent) !important; outline: 2px solid var(--gc-accent-soft); }
.gc-checks { border: 1px solid var(--gc-line); border-radius: 10px; padding: 12px 14px; margin: 0; display: grid; gap: 8px; font-size: 14px; }
.gc-checks legend { font-weight: 700; padding: 0 6px; font-size: 13px; color: var(--gc-ink); }
.gc-checks label { display: flex; gap: 10px; align-items: flex-start; }
.gc-checks input { margin-top: 4px; }
.gc-form .gc-btn { justify-self: start; }
.gc-hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.gc-cta { background: var(--gc-accent-soft); border: 1px solid #bfdbfe; border-radius: 12px; padding: 22px 24px; }
.gc-page .gc-cta p { margin: 6px 0 14px; color: var(--gc-muted); max-width: 720px; }
/* Authors */
.gc-author { display: flex; gap: 18px; align-items: flex-start; background: #fff; border: 1px solid var(--gc-line); border-radius: 12px; padding: 18px 20px; }
.gc-author .gc-avatar { border-radius: 50%; flex: none; object-fit: cover; }
.gc-author-body { min-width: 0; }
.gc-author h1, .gc-author h3 { margin: 0; color: var(--gc-ink); font-family: var(--gc-sans); }
.gc-author h1 { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 800; letter-spacing: -.02em; }
.gc-author h3 { font-size: 18px; }
.gc-author h3 a { color: var(--gc-ink); }
.gc-author .gc-eyebrow { margin: 0 0 4px; }
.gc-author-meta { margin: 4px 0 0; color: var(--gc-muted); font-size: 14.5px; }
.gc-author-bio { margin: 10px 0 0; color: var(--gc-text); font-size: 15px; line-height: 1.6; }
.gc-author-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 0; }
.gc-author-tags span { font: 500 12px var(--gc-mono); background: #f1f5f9; color: var(--gc-text); padding: 3px 8px; border-radius: 6px; }
.gc-author-links { display: flex; gap: 16px; margin: 10px 0 0; font-weight: 600; font-size: 14px; }
.gc-author-links a { display: inline-flex; gap: 5px; align-items: center; }
.gc-author-box { margin-top: 40px; }
.gc-author-page { padding-top: 24px; padding-bottom: 0; }
.gc-author-page .gc-author-h { font-size: 20px; margin: 28px 0 0; }
.gc-authors { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-bottom: 28px; }
.gc-byline { display: flex; gap: 12px; align-items: center; padding: 0 0 16px; margin: 0 0 22px; border-bottom: 1px solid var(--gc-line); font-size: 14.5px; }
.gc-byline .gc-avatar { border-radius: 50%; }
.gc-byline span { display: block; font-weight: 600; color: var(--gc-ink); }
.gc-byline small { display: block; color: var(--gc-faint); font-size: 13px; }
@media (max-width: 980px) { .gc-topics { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .gc-topics, .gc-form-grid, .gc-authors { grid-template-columns: 1fr; } .gc-author { flex-direction: column; } }

/* ---------- My account (v1.6) ---------- */
.gc-account-head { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; padding: 6px 0 20px; border-bottom: 1px solid var(--gc-line); margin-bottom: 22px; }
.gc-account-head .gc-avatar { border-radius: 50%; object-fit: cover; }
.gc-account-head h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -.02em; }
.gc-account-head .gc-eyebrow { margin: 0 0 2px; }
.gc-account-head .gc-muted { margin: 4px 0 0; font-size: 14px; }
.gc-account-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.gc-account-start { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.gc-account-start .gc-ico { width: 22px; height: 22px; color: var(--gc-accent); }
.gc-account-work td { vertical-align: top; }
.gc-account-links { white-space: nowrap; font-weight: 600; }
.gc-st { display: inline-block; font: 600 11.5px var(--gc-mono); padding: 2px 8px; border-radius: 6px; background: #f1f5f9; color: var(--gc-text); }
.gc-st-pending { background: var(--gc-warn-soft); color: var(--gc-warn); }
.gc-st-publish { background: var(--gc-pass-soft); color: var(--gc-pass); }
.gc-st-future { background: var(--gc-accent-soft); color: var(--gc-accent-ink); }
.gc-account-photo { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.gc-account-photo .gc-avatar { border-radius: 50%; object-fit: cover; }
.gc-check-inline { display: flex; gap: 8px; align-items: center; font-size: 14px; }
.gc-account-login { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; max-width: 960px; }
.gc-account-login form p { margin: 0 0 12px; }
.gc-account-login label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.gc-page .gc-account-login input[type="text"], .gc-page .gc-account-login input[type="password"] { width: 100%; border: 1px solid var(--gc-line-2) !important; border-radius: 8px !important; padding: 9px 11px !important; font: 400 15px var(--gc-sans) !important; background: #fff !important; }
.gc-account-login .login-remember label { display: flex; gap: 8px; align-items: center; font-weight: 500; }
.gc-account-login input[type="submit"] { background: var(--gc-accent) !important; color: #fff !important; border: 0 !important; border-radius: 8px !important; padding: 10px 18px !important; font: 600 14px var(--gc-sans) !important; cursor: pointer; }
.gc-menu-account > a { font-weight: 600; }
@media (max-width: 860px) { .gc-account-start, .gc-account-login { grid-template-columns: 1fr; } .gc-account-actions { margin-left: 0; } }

/* ---------- Publications (v1.6) ---------- */
.gc-pub-head { padding: 0 0 18px; margin: 0 0 24px; border-bottom: 1px solid var(--gc-line); }
.gc-pub-head .gc-eyebrow { margin: 0 0 6px; }
.gc-pub-authors { margin: 0; font-weight: 600; color: var(--gc-ink); font-size: 16px; }
.gc-pub-meta { margin: 4px 0 12px; color: var(--gc-faint); font-size: 14px; }
.gc-pub-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.gc-pub-actions .gc-ico { width: 16px; height: 16px; }
.gc-pub-box { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--gc-line); }
.gc-pub-box h2 { font-size: 20px; margin: 0 0 12px; }
.gc-pub-log { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.gc-pub-log th, .gc-pub-log td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--gc-line); }
.gc-pub-log th { font: 700 12px var(--gc-mono); text-transform: uppercase; color: var(--gc-muted); }
.gc-cite-label { margin: 12px 0 6px; font: 700 12px var(--gc-mono); letter-spacing: .06em; color: var(--gc-faint); }
.gc-cite { display: flex; gap: 10px; align-items: flex-start; background: #f8fafc; border: 1px solid var(--gc-line); border-radius: 8px; padding: 10px 12px; }
.gc-cite code, .gc-cite pre { flex: 1; margin: 0; background: none; font: 13px/1.55 var(--gc-mono); color: var(--gc-text); white-space: pre-wrap; word-break: break-word; padding: 0; border: 0; }
.gc-pub-by { font-size: 13px; color: var(--gc-faint); }
@media print {
  #wpadminbar, .site-header, #masthead, .site-footer, #colophon, .gc-pub-actions, .gc-cite button, .comments-area, .entry-related, .post-navigation { display: none !important; }
  body, .site, .content-bg { background: #fff !important; }
  .gc-pub-box { break-inside: avoid; }
  a { color: inherit; text-decoration: none; }
}
.gc-pub-head .gc-eyebrow, .gc-author .gc-eyebrow, .gc-pub-box .gc-eyebrow { font-family: var(--gc-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--gc-accent); }
.gc-pub-head a, .gc-byline a, .gc-author a, .gc-pub-box a { color: var(--gc-accent-ink); text-decoration: none; }
.gc-pub-head a:hover, .gc-byline a:hover, .gc-author a:hover { text-decoration: underline; }
.gc-pub-actions .gc-btn, .gc-pub-box .gc-btn { text-decoration: none; }
.gc-pub-actions .gc-btn-ghost, .gc-pub-box .gc-btn-ghost { color: var(--gc-text) !important; }