/* ============================================================
   ΣΗΜΑΤΟΛΟΓΙΟ · SIMATOLOGIO
   Editorial register of mobile signal & network technology in Greece.
   Cold graphite instrument look: ink · steel · vermilion.
   Layer 1 = shared system (chrome, documents, articles)
   Layer 2 = .sg-* homepage layer (field report + sticky region index)
   ============================================================ */

:root {
  --ink:            #12171c;
  --ink-2:          #0b0f13;
  --ink-3:          #1c242b;
  --vermilion:      #e2452b;
  --vermilion-ink:  #a92d18;
  --vermilion-wash: #fdece8;
  --steel:          #55636e;
  --steel-2:        #8996a2;
  --paper:          #f4f5f6;
  --paper-2:        #ffffff;
  --line:           #dde1e5;
  --line-2:         #c9cfd5;
  --grid:           rgba(226, 69, 43, 0.10);
  --pad-x:          clamp(1rem, 4vw, 2.75rem);
  --shell-max:      1200px;
  --ff-display:     "Roboto Slab", "Georgia", serif;
  --ff-body:        "Inter", system-ui, -apple-system, sans-serif;
  --ff-mono:        "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;
  --shadow:         0 1px 2px rgba(18, 23, 28, 0.05), 0 14px 30px -22px rgba(18, 23, 28, 0.38);
  --shadow-sm:      0 1px 2px rgba(18, 23, 28, 0.06);
  --radius:         3px;
}

/* Bilingual: Greek default, English on toggle.
   NOTE: never write `.foo span { display: … }` — specificity 11 would
   defeat `.lang-en { display:none }` and show both languages at once.
   Always scope to direct children: `.foo > span`. */
.lang-en { display: none; }
html[lang="en"] .lang-en { display: inline; }
html[lang="en"] .lang-el { display: none; }
.lang-en.block { display: none; }
html[lang="en"] .lang-en.block { display: block; }
.lang-el.block { display: block; }
html[lang="en"] .lang-el.block { display: none; }

.lang-toggle {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.4rem 0.6rem; border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius); color: #fff;
  font-family: var(--ff-mono); font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.02em; min-height: 2rem;
}
.lang-toggle svg { width: 13px; height: 13px; }
.lang-toggle:hover { background: rgba(255, 255, 255, 0.1); border-color: var(--vermilion); }

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--ff-body);
  font-size: 16.5px;
  line-height: 1.68;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { color: var(--vermilion-ink); }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
ul { list-style: none; padding: 0; }
.shell { width: min(100% - var(--pad-x) * 2, var(--shell-max)); margin-inline: auto; }

:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 2px;
}

.skip-link {
  position: absolute; inset-inline-start: 1rem; top: -4rem; z-index: 100;
  background: var(--vermilion); color: var(--ink-2); padding: 0.6rem 1rem;
  border-radius: var(--radius); font-weight: 700;
}
.skip-link:focus { top: 1rem; color: var(--ink-2); }

/* ---------- Utility bar + masthead ---------- */
.util-bar {
  background: var(--ink-2);
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.8rem;
}
.util-inner {
  display: flex; align-items: center; gap: 0.75rem;
  min-height: 2.6rem; flex-wrap: wrap; padding-block: 0.25rem;
}
.util-brand {
  display: inline-flex; align-items: center; gap: 0.45rem;
  text-decoration: none; font-weight: 600; letter-spacing: 0.01em;
}
.util-brand:hover { color: #fff; }
.util-node {
  width: 0.5rem; height: 0.5rem; border-radius: 1px;
  background: var(--vermilion); box-shadow: 0 0 0 3px rgba(226, 69, 43, 0.22);
}
.util-spacer { flex: 1; }
.util-status {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--ff-mono); font-size: 0.7rem; letter-spacing: 0.02em;
  color: var(--steel-2);
}
.util-dot {
  width: 0.35rem; height: 0.35rem; border-radius: 50%;
  background: var(--vermilion); animation: pulse 2.8s ease-in-out infinite;
}
/* On narrow screens the status line pushes the bar onto a third row; the same
   statement is repeated in the disclaimer strip and the footer. */
@media (max-width: 620px) {
  .util-status { display: none; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.mast {
  position: sticky; top: 0; z-index: 40;
  background: rgba(244, 245, 246, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.25s;
}
.mast.is-stuck { box-shadow: 0 10px 26px -22px rgba(18, 23, 28, 0.5); }
.mast-inner {
  display: flex; align-items: center; gap: 0.75rem;
  min-height: 4.1rem;
}
.mast-logo {
  display: inline-flex; align-items: center; gap: 0.65rem;
  text-decoration: none; min-width: 0;
}
.mast-logo:hover { color: inherit; }
.mast-mark {
  width: 2.4rem; height: 2.4rem; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--ink); border-radius: var(--radius);
}
.mast-mark svg { width: 1.4rem; height: 1.4rem; }
.mast-word { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.mast-name {
  font-family: var(--ff-display);
  font-size: 1.22rem; font-weight: 700; color: var(--ink);
  letter-spacing: -0.005em;
}
.mast-tagline {
  font-size: 0.72rem; color: var(--steel);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.mast-toggle {
  margin-inline-start: auto; width: 2.75rem; height: 2.75rem;
  display: none; place-items: center;
  border: 1px solid var(--line-2); border-radius: var(--radius);
  background: var(--paper-2);
}
.mast-toggle svg { width: 1.3rem; height: 1.3rem; }
.mast-toggle .icon-close { display: none; }
.mast.is-open .mast-toggle .icon-open { display: none; }
.mast.is-open .mast-toggle .icon-close { display: block; }

.mast-nav { margin-inline-start: auto; }
.mast-links { display: flex; align-items: center; gap: 0.15rem 1rem; flex-wrap: wrap; }
.mast-link {
  display: inline-block; padding: 0.3rem 0;
  text-decoration: none; font-size: 0.88rem; font-weight: 500; color: var(--steel);
  border-bottom: 2px solid transparent;
}
.mast-link:hover { color: var(--ink); border-bottom-color: var(--vermilion); }
.mast-cta {
  display: inline-flex; align-items: center; min-height: 2.4rem;
  padding: 0.4rem 1rem; background: var(--vermilion); color: var(--ink-2) !important;
  text-decoration: none; font-size: 0.85rem; font-weight: 700; border-radius: var(--radius);
}
.mast-cta:hover { background: var(--ink); color: var(--paper-2) !important; }

@media (max-width: 960px) {
  .mast-toggle { display: grid; }
  .mast-nav {
    display: none; position: absolute; inset-inline: 0; top: 100%;
    background: var(--paper-2); border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--pad-x) 1.1rem;
    box-shadow: 0 18px 30px -24px rgba(18, 23, 28, 0.6);
    max-height: calc(100vh - 6.7rem); overflow-y: auto;
  }
  .mast.is-open .mast-nav { display: block; }
  .mast-links { flex-direction: column; align-items: stretch; gap: 0.1rem; }
  .mast-link {
    padding: 0.8rem 0.25rem; border-bottom: 1px solid var(--line);
    font-size: 0.98rem;
  }
  .mast-link:hover { border-bottom-color: var(--line); }
  .mast-cta { justify-content: center; margin-top: 0.75rem; min-height: 2.9rem; }
  .mast-tagline { display: none; }
}

/* ---------- Generic sections / notice / CTAs ---------- */
.section { padding-block: clamp(2.75rem, 7vw, 4.75rem); }
.section-ink { background: var(--ink); color: var(--paper); }
.section-head { max-width: 44rem; margin-bottom: clamp(1.5rem, 4vw, 2.5rem); }
.eyebrow {
  display: inline-block;
  font-family: var(--ff-mono); font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--vermilion-ink); margin-bottom: 0.6rem;
}
.section-ink .eyebrow { color: var(--paper); }
.section-head h2 {
  font-family: var(--ff-display);
  font-size: clamp(1.6rem, 3.6vw, 2.35rem);
  font-weight: 700; line-height: 1.18; color: var(--ink);
  letter-spacing: -0.015em; margin-bottom: 0.6rem;
}
.section-ink .section-head h2 { color: var(--paper-2); }
.section-head p { color: var(--steel); font-size: 1rem; }
.section-ink .section-head p { color: var(--steel-2); }

.notice {
  background: var(--vermilion-wash);
  border-block: 1px solid rgba(226, 69, 43, 0.24);
  padding: 0.95rem 0;
}
.notice-inner {
  display: flex; gap: 0.8rem; align-items: flex-start;
  font-size: 0.92rem; color: var(--ink);
}
.notice-mark {
  flex-shrink: 0; width: 1.5rem; height: 1.5rem; margin-top: 0.1rem;
  display: grid; place-items: center; border-radius: var(--radius);
  background: var(--vermilion); color: var(--ink-2); font-weight: 700; font-size: 0.8rem;
}
.notice strong { color: var(--vermilion-ink); }

.cta {
  display: inline-flex; align-items: center; gap: 0.4rem;
  min-height: 2.9rem; padding: 0.75rem 1.25rem;
  background: var(--vermilion); color: var(--ink-2) !important;
  font-weight: 700; text-decoration: none; border-radius: var(--radius);
}
.cta:hover { background: var(--ink); color: var(--paper-2) !important; }
.cta-ghost {
  display: inline-flex; align-items: center;
  min-height: 2.9rem; padding: 0.75rem 1.2rem;
  border: 1px solid var(--line-2); color: var(--ink) !important;
  text-decoration: none; border-radius: var(--radius); font-weight: 600;
  background: var(--paper-2);
}
.cta-ghost:hover { border-color: var(--vermilion); color: var(--vermilion-ink) !important; }

/* ---------- Legacy shared layers (kept, re-themed) ---------- */
.geo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 900px) { .geo-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .geo-grid { grid-template-columns: 1fr; } }
.geo-item {
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.2rem 1.25rem 1.3rem;
  position: relative; overflow: hidden;
}
.geo-item::before {
  content: ""; position: absolute; inset-inline-start: 0; top: 0; bottom: 0; width: 3px;
  background: var(--vermilion);
}
.geo-place { font-family: var(--ff-display); font-size: 1.2rem; font-weight: 600; color: var(--ink); margin-bottom: 0.3rem; }
.geo-meta { font-family: var(--ff-mono); font-size: 0.7rem; color: var(--steel); margin-bottom: 0.6rem; letter-spacing: 0.06em; }
.geo-item p { font-size: 0.94rem; color: var(--steel); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1.15rem; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } }
.panel {
  background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius); padding: 1.4rem 1.35rem 1.5rem;
}
.panel h3 { font-family: var(--ff-display); font-size: 1.3rem; font-weight: 600; margin-bottom: 0.5rem; }
.panel p { color: var(--steel-2); margin-bottom: 0.9rem; font-size: 0.96rem; }
.panel ul { display: grid; gap: 0.5rem; }
.panel li { display: flex; gap: 0.5rem; align-items: flex-start; font-size: 0.94rem; color: rgba(255, 255, 255, 0.9); }
.panel li::before {
  content: ""; flex-shrink: 0; width: 0.4rem; height: 0.4rem; margin-top: 0.55rem;
  background: var(--vermilion);
}
.feature-row { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(1.4rem, 4vw, 2.75rem); align-items: center; }
@media (max-width: 860px) { .feature-row { grid-template-columns: 1fr; } }
.stat-stack { display: grid; gap: 0.8rem; }
.stat { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; display: grid; gap: 0.15rem; }
.stat-num { font-family: var(--ff-mono); font-size: 1.5rem; font-weight: 500; color: var(--ink); letter-spacing: -0.02em; }
.stat-label { font-size: 0.9rem; color: var(--steel); }
.wifi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 800px) { .wifi-grid { grid-template-columns: 1fr; } }
.wifi-tile { padding: 1.3rem 1.25rem; background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); }
.wifi-tile h3 { font-family: var(--ff-display); font-size: 1.2rem; color: var(--ink); margin: 0.5rem 0 0.4rem; }
.wifi-ico { width: 2.3rem; height: 2.3rem; display: grid; place-items: center; background: var(--vermilion-wash); color: var(--vermilion-ink); border-radius: var(--radius); }
.wifi-ico svg { width: 1.2rem; height: 1.2rem; }
.wifi-tile p { color: var(--steel); font-size: 0.94rem; }
.signal { display: inline-flex; align-items: center; gap: 0.35rem; margin-top: 0.8rem; font-size: 0.78rem; font-weight: 600; color: var(--vermilion-ink); }
.signal-bars { display: inline-flex; align-items: flex-end; gap: 2px; height: 12px; }
.signal-bars i { display: block; width: 3px; background: var(--vermilion); }
.signal-bars i:nth-child(1) { height: 4px; }
.signal-bars i:nth-child(2) { height: 7px; }
.signal-bars i:nth-child(3) { height: 10px; }
.signal-bars i:nth-child(4) { height: 12px; opacity: 0.4; }

/* ---------- Article feed cards ---------- */
.mag-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 900px) { .mag-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .mag-grid { grid-template-columns: 1fr; } }
.mag-card {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 1.25rem 1.2rem 1.3rem; background: var(--paper-2);
  border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.mag-card:hover {
  border-color: var(--line-2); box-shadow: var(--shadow);
  transform: translateY(-2px); color: inherit;
}
.mag-kicker {
  font-family: var(--ff-mono); font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--vermilion-ink);
}
.mag-card h3 {
  font-family: var(--ff-display); font-size: 1.12rem; font-weight: 600;
  color: var(--ink); line-height: 1.3;
}
.mag-card p { font-size: 0.92rem; color: var(--steel); flex: 1; }
.mag-more { font-family: var(--ff-mono); font-size: 0.75rem; font-weight: 500; color: var(--vermilion-ink); }

/* ---------- Contact band ---------- */
.contact-band {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 1.5rem;
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: clamp(1.25rem, 4vw, 2.25rem);
}
@media (max-width: 760px) { .contact-band { grid-template-columns: 1fr; } }
.contact-band h2 {
  font-family: var(--ff-display); font-size: clamp(1.5rem, 3.2vw, 2rem);
  color: var(--ink); margin-bottom: 0.5rem; letter-spacing: -0.015em;
}
.contact-band > div > p { color: var(--steel); margin-bottom: 1rem; }
.contact-list { display: grid; gap: 0.7rem; }
.contact-list dt {
  font-family: var(--ff-mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--steel);
}
.contact-list dd { font-weight: 500; color: var(--ink); margin-bottom: 0.3rem; }
.contact-list a { text-decoration: none; color: var(--vermilion-ink); }
.contact-list a:hover { text-decoration: underline; }

/* ---------- Independence disclaimer strip ---------- */
.declaim {
  background: var(--ink-3); color: var(--steel-2);
  border-top: 3px solid var(--vermilion);
  padding-block: 1.35rem;
}
.declaim-inner { display: grid; grid-template-columns: auto 1fr; gap: 0.9rem; align-items: start; }
.declaim-tag {
  font-family: var(--ff-mono); font-size: 0.66rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.25); border-radius: var(--radius);
  padding: 0.3rem 0.5rem; white-space: nowrap;
}
.declaim p { font-size: 0.88rem; max-width: 88ch; }
.declaim a { color: var(--paper); }
@media (max-width: 560px) {
  .declaim-inner { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink-2); color: var(--steel-2);
  padding-block: 2.75rem 1.6rem;
}
.foot-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 1.75rem;
  margin-bottom: 2rem;
}
@media (max-width: 900px) { .foot-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; } }
@media (max-width: 520px) { .foot-grid { grid-template-columns: 1fr; gap: 1.4rem; } }
.foot-brand {
  font-family: var(--ff-display); font-size: 1.35rem; font-weight: 700;
  color: var(--paper-2); margin-bottom: 0.45rem; letter-spacing: -0.01em;
}
.foot-grid p:not([class]) { font-size: 0.88rem; max-width: 38ch; }
.foot-grid h4 {
  font-size: 0.68rem; font-family: var(--ff-mono); letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--paper); margin-bottom: 0.7rem;
}
.foot-grid ul { display: grid; gap: 0.3rem; }
.foot-grid a {
  color: var(--steel-2); text-decoration: none; font-size: 0.9rem;
  display: inline-block; padding: 0.2rem 0;
}
.foot-grid a:hover { color: var(--paper-2); }
.foot-bottom {
  display: flex; flex-wrap: wrap; gap: 0.6rem 1.5rem;
  justify-content: space-between; align-items: center;
  padding-top: 1.15rem; border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--ff-mono); font-size: 0.72rem; color: var(--steel-2);
}

/* ---------- Cookie banner ---------- */
.consent {
  position: fixed; inset-inline: 0.75rem; bottom: 0.75rem; z-index: 60;
  max-width: 26rem; margin-inline-start: auto;
  background: var(--paper-2); border: 1px solid var(--line-2);
  border-top: 3px solid var(--vermilion);
  border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.05rem 1.1rem 1.15rem;
  transform: translateY(130%); opacity: 0;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.35s;
}
.consent.shown { transform: translateY(0); opacity: 1; }
.consent h3 {
  font-family: var(--ff-display); font-size: 1.1rem; color: var(--ink);
  margin-bottom: 0.35rem;
}
.consent p { font-size: 0.86rem; color: var(--steel); margin-bottom: 0.9rem; }
.consent p a { color: var(--vermilion-ink); }
.consent-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.consent-ok {
  min-height: 2.6rem; padding: 0.5rem 1rem; background: var(--vermilion); color: var(--ink-2);
  font-weight: 700; border-radius: var(--radius); font-size: 0.85rem;
}
.consent-ok:hover { background: var(--ink); color: var(--paper-2); }
.consent-no {
  min-height: 2.6rem; padding: 0.5rem 1rem; border: 1px solid var(--line-2);
  font-weight: 600; border-radius: var(--radius); font-size: 0.85rem; color: var(--steel);
}
.consent-no:hover { border-color: var(--steel); color: var(--ink); }

/* ---------- Motion (readable without JS) ---------- */
.js .rise {
  opacity: 0; transform: translateY(14px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--i, 0) * 60ms);
}
.js .rise.lit { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .rise { opacity: 1; transform: none; }
}

/* ---------- Document & article pages ---------- */
.doc-top, .article-top {
  padding-block: clamp(2rem, 5vw, 3.25rem) 1.4rem;
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
}
.doc-top .mono-eyebrow, .article-top .mono-eyebrow {
  font-family: var(--ff-mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--vermilion-ink); display: block; margin-bottom: 0.55rem;
}
.doc-top h1, .article-top h1 {
  font-family: var(--ff-display); font-size: clamp(1.75rem, 4.2vw, 2.6rem);
  font-weight: 700; color: var(--ink); line-height: 1.15;
  letter-spacing: -0.02em; margin-bottom: 0.6rem; max-width: 26ch;
}
.doc-top p:not([class]), .article-top p:not([class]) { color: var(--steel); max-width: 62ch; font-size: 1.02rem; }
/* keep the article header on the same measure as the reading column below it */
.article-top .shell { width: min(100% - var(--pad-x) * 2, 46rem); }
.stamp {
  display: inline-block; margin-top: 0.9rem;
  font-family: var(--ff-mono); font-size: 0.72rem; color: var(--steel);
  padding: 0.28rem 0.6rem; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper);
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 0.4rem 0.75rem; margin-top: 0.9rem;
  font-family: var(--ff-mono); font-size: 0.72rem; color: var(--steel);
}
.article-meta > span {
  padding: 0.28rem 0.6rem; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--paper);
}

.doc-layout {
  display: grid; grid-template-columns: 15rem 1fr; gap: 2.25rem;
  padding-block: 2.25rem 3.5rem; align-items: start;
}
@media (max-width: 880px) { .doc-layout { grid-template-columns: 1fr; gap: 1.5rem; } }
.doc-toc {
  position: sticky; top: 5.25rem;
  padding: 1rem 1.1rem; background: var(--paper-2);
  border: 1px solid var(--line); border-radius: var(--radius);
}
@media (max-width: 880px) { .doc-toc { position: static; } }
.doc-toc h4 {
  font-family: var(--ff-mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--steel); margin-bottom: 0.6rem;
}
.doc-toc a {
  display: block; font-size: 0.86rem; text-decoration: none; color: var(--steel);
  padding: 0.45rem 0; border-bottom: 1px solid var(--line);
}
.doc-toc a:last-child { border-bottom: 0; }
.doc-toc a:hover { color: var(--vermilion-ink); }
.doc-content { min-width: 0; }
.doc-content h2 {
  font-family: var(--ff-display); font-size: 1.32rem; font-weight: 600; color: var(--ink);
  margin: 1.85rem 0 0.6rem; letter-spacing: -0.01em; scroll-margin-top: 5.5rem;
}
.doc-content h2:first-child { margin-top: 0; }
.doc-content h3 { font-size: 1.02rem; font-weight: 600; color: var(--vermilion-ink); margin: 1.3rem 0 0.4rem; }
.doc-content p, .doc-content li { color: var(--steel); margin-bottom: 0.8rem; }
.doc-content ul { padding-inline-start: 1.15rem; list-style: disc; margin-bottom: 1rem; }
.doc-content ol { padding-inline-start: 1.3rem; margin-bottom: 1rem; }
.doc-content a { color: var(--vermilion-ink); }
.doc-content strong { color: var(--ink); }
.infobox {
  padding: 0.95rem 1.1rem; border: 1px solid rgba(226, 69, 43, 0.3);
  border-inline-start: 3px solid var(--vermilion);
  border-radius: var(--radius);
  background: var(--vermilion-wash); margin: 1.15rem 0; font-size: 0.94rem;
  color: var(--ink);
}
.infobox.is-signal { border-color: var(--line-2); border-inline-start-color: var(--ink); background: var(--paper-2); }
.infobox strong { color: var(--vermilion-ink); }
.table-wrap {
  overflow-x: auto; margin: 1.15rem 0;
  border: 1px solid var(--line); border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
}
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; min-width: 34rem; }
th, td { padding: 0.7rem 0.85rem; text-align: start; border-bottom: 1px solid var(--line); }
th {
  background: var(--ink); color: var(--paper-2); font-weight: 500;
  font-family: var(--ff-mono); font-size: 0.72rem;
  letter-spacing: 0.06em; text-transform: uppercase;
}
td { background: var(--paper-2); color: var(--steel); }
tr:last-child td { border-bottom: 0; }
td strong { color: var(--ink); }

.article-body { max-width: 46rem; margin-inline: auto; padding-block: 2.25rem 3.5rem; }
.article-body h2 {
  font-family: var(--ff-display); font-size: clamp(1.3rem, 2.6vw, 1.55rem);
  font-weight: 600; color: var(--ink); margin: 2rem 0 0.65rem;
  letter-spacing: -0.01em; scroll-margin-top: 5.5rem;
}
.article-body h3 { font-size: 1.05rem; font-weight: 600; color: var(--vermilion-ink); margin: 1.35rem 0 0.4rem; }
.article-body p:not([class]) { color: var(--steel); margin-bottom: 1rem; font-size: 1.03rem; }
.article-body ul { padding-inline-start: 1.15rem; list-style: disc; margin-bottom: 1rem; }
.article-body ol { padding-inline-start: 1.3rem; margin-bottom: 1rem; }
.article-body li { color: var(--steel); margin-bottom: 0.4rem; }
.article-body strong { color: var(--ink); }
.article-body a { color: var(--vermilion-ink); }
.pullquote {
  margin: 1.6rem 0; padding: 1.1rem 1.25rem;
  border-inline-start: 3px solid var(--vermilion);
  background: var(--paper-2); border-radius: var(--radius);
  font-family: var(--ff-display); font-size: 1.12rem; font-weight: 500;
  line-height: 1.45; color: var(--ink);
}
.remember {
  margin: 1.6rem 0; padding: 1.15rem 1.3rem;
  background: var(--ink); color: var(--steel-2); border-radius: var(--radius);
}
.remember h2 {
  font-family: var(--ff-display); font-size: 1.1rem; font-weight: 600;
  color: var(--paper-2); margin: 0 0 0.6rem;
}
.remember ul { padding-inline-start: 1.15rem; list-style: disc; margin: 0; }
.remember li { color: var(--steel-2); margin-bottom: 0.35rem; font-size: 0.95rem; }
.source-note {
  margin: 1.5rem 0 0; padding: 0.95rem 1.1rem;
  border: 1px dashed var(--line-2); border-radius: var(--radius);
  font-size: 0.9rem; color: var(--steel); background: var(--paper-2);
}
.source-note strong { color: var(--ink); }
.article-nav {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1rem; justify-content: space-between;
  margin-top: 2.25rem; padding-top: 1.35rem; border-top: 1px solid var(--line);
}
.article-nav a {
  font-family: var(--ff-mono); font-size: 0.8rem; font-weight: 500;
  color: var(--vermilion-ink); text-decoration: none; padding: 0.4rem 0;
}
.article-nav a:hover { text-decoration: underline; }
.related { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.related h2 {
  font-family: var(--ff-mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--steel); margin: 0 0 0.85rem;
}
.related ul { display: grid; gap: 0.5rem; }
.related a {
  display: block; padding: 0.7rem 0.85rem; background: var(--paper-2);
  border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: var(--ink); font-weight: 500; font-size: 0.95rem;
}
.related a:hover { border-color: var(--vermilion); color: var(--vermilion-ink); }

.page-hero-mini {
  padding-block: clamp(2rem, 5vw, 3rem);
  background: var(--ink); color: var(--paper);
}
.page-hero-mini h1 {
  font-family: var(--ff-display); font-size: clamp(1.75rem, 4.2vw, 2.5rem);
  font-weight: 700; color: var(--paper-2);
  letter-spacing: -0.02em; margin-bottom: 0.5rem;
}
.page-hero-mini p:not([class]) { color: var(--steel-2); max-width: 52ch; }

/* ---------- Plain form (contact) ---------- */
.form-card {
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: clamp(1.15rem, 3vw, 1.75rem);
}
.form-row { display: grid; gap: 0.35rem; margin-bottom: 1rem; }
.form-row label {
  font-family: var(--ff-mono); font-size: 0.7rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--steel);
}
.form-row input, .form-row textarea, .form-row select {
  font: inherit; font-size: 0.95rem; color: var(--ink);
  padding: 0.7rem 0.8rem; background: var(--paper);
  border: 1px solid var(--line-2); border-radius: var(--radius);
  width: 100%; min-height: 2.9rem;
}
.form-row textarea { min-height: 8rem; resize: vertical; }
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
  border-color: var(--vermilion); background: var(--paper-2);
}
.form-hint { font-size: 0.82rem; color: var(--steel); }
.form-check { display: flex; gap: 0.6rem; align-items: flex-start; margin-bottom: 1rem; }
.form-check input { width: 1.1rem; height: 1.1rem; margin-top: 0.25rem; flex-shrink: 0; }
.form-check label { font-size: 0.86rem; color: var(--steel); }
.form-submit {
  min-height: 2.9rem; padding: 0.75rem 1.4rem; background: var(--vermilion);
  color: var(--ink-2); font-weight: 700; border-radius: var(--radius);
}
.form-submit:hover { background: var(--ink); color: var(--paper-2); }

/* ---------- 404 ---------- */
.nf {
  padding-block: clamp(3rem, 9vw, 6rem);
  text-align: center;
}
.nf-code {
  font-family: var(--ff-mono); font-size: clamp(3.5rem, 14vw, 7rem);
  font-weight: 500; color: var(--vermilion); line-height: 1; letter-spacing: -0.04em;
}
.nf h1 {
  font-family: var(--ff-display); font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700; color: var(--ink); margin: 0.75rem 0 0.6rem; letter-spacing: -0.02em;
}
.nf p:not([class]) { color: var(--steel); max-width: 46ch; margin-inline: auto; margin-bottom: 1.5rem; }
.nf-links { display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; }

/* ============================================================
   LAYER 2 — .sg-* homepage layer
   "field report with a sticky region index"
   ============================================================ */

/* --- 1. Hero --- */
.sg-hero {
  background: var(--ink);
  color: var(--paper);
  border-bottom: 3px solid var(--vermilion);
  overflow: hidden;
}
.sg-hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3.25rem); align-items: center;
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
}
@media (max-width: 900px) { .sg-hero-grid { grid-template-columns: 1fr; gap: 1.75rem; } }
.sg-eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--ff-mono); font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--paper);
  margin-bottom: 1rem;
}
.sg-eyebrow::before {
  content: ""; width: 1.75rem; height: 2px; background: var(--vermilion);
}
.sg-hero h1 {
  font-family: var(--ff-display);
  font-size: clamp(1.75rem, 4.9vw, 2.95rem);
  font-weight: 700; line-height: 1.12; letter-spacing: -0.015em;
  color: var(--paper-2); margin-bottom: 0.9rem;
  max-width: 22ch; text-wrap: balance;
}
.sg-hero h1 em { font-style: normal; color: var(--vermilion); }
.sg-hero-lead { font-size: clamp(0.98rem, 2.2vw, 1.1rem); color: var(--steel-2); max-width: 48ch; margin-bottom: 1.4rem; }
.sg-hero-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.sg-hero-actions .cta-ghost {
  background: transparent; color: var(--paper-2) !important;
  border-color: rgba(255, 255, 255, 0.3);
}
.sg-hero-actions .cta-ghost:hover { border-color: var(--vermilion); color: var(--paper-2) !important; background: rgba(255, 255, 255, 0.06); }
.sg-hero-figure {
  max-width: 34rem; margin-inline: auto; width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: var(--ink-2);
  padding: 0.9rem 0.9rem 0.75rem;
}
.sg-hero-figure svg { width: 100%; height: auto; }
.sg-figcap {
  font-family: var(--ff-mono); font-size: 0.66rem; line-height: 1.5;
  color: var(--steel-2); letter-spacing: 0.02em; margin-top: 0.6rem;
  padding-top: 0.55rem; border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Grid children default to min-width:auto, so a horizontally scrollable child
   (the mobile region-chip row, a wide table) can force its track wider than the
   viewport and blow the page out sideways. Pin every such track to min-width:0. */
.sg-hero-grid > *, .sg-regions-grid > *, .sg-tradeoff > *,
.sg-contact-grid > *, .contact-band > *, .doc-layout > *,
.sg-indoor-grid > *, .sg-feed > *, .foot-grid > * { min-width: 0; }
.sg-index ol { min-width: 0; }

/* --- 2. Indicator strip --- */
.sg-strip { background: var(--paper-2); border-bottom: 1px solid var(--line); }
.sg-strip-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-inline-start: 1px solid var(--line);
}
@media (max-width: 760px) { .sg-strip-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 380px) { .sg-strip-grid { grid-template-columns: 1fr; } }
.sg-tile {
  padding: 1.15rem 1.1rem 1.2rem;
  border-inline-end: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.sg-tile-num {
  display: block; font-family: var(--ff-mono);
  font-size: clamp(1.6rem, 4.5vw, 2.1rem); font-weight: 500;
  color: var(--ink); line-height: 1; letter-spacing: -0.03em;
  margin-bottom: 0.45rem;
}
.sg-tile-num i { font-style: normal; color: var(--vermilion); }
.sg-tile-label { display: block; font-size: 0.85rem; color: var(--steel); line-height: 1.45; }

/* --- 3. Region reports + sticky index --- */
.sg-regions { padding-block: clamp(2.5rem, 6.5vw, 4.5rem); }
.sg-regions-grid {
  display: grid; grid-template-columns: 15rem 1fr;
  gap: clamp(1.5rem, 3.5vw, 2.75rem); align-items: start;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}
@media (max-width: 900px) { .sg-regions-grid { grid-template-columns: 1fr; gap: 1.25rem; } }
.sg-index { position: sticky; top: 5.25rem; }
.sg-index-title {
  font-family: var(--ff-mono); font-size: 0.66rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--steel); margin-bottom: 0.7rem;
}
.sg-index ol { list-style: none; padding: 0; counter-reset: sgidx; border-top: 1px solid var(--line); }
.sg-index li { counter-increment: sgidx; }
.sg-index a {
  display: flex; gap: 0.65rem; align-items: baseline;
  padding: 0.65rem 0.35rem; border-bottom: 1px solid var(--line);
  text-decoration: none; color: var(--steel); font-size: 0.9rem; font-weight: 500;
}
.sg-index a::before {
  content: counter(sgidx, decimal-leading-zero);
  font-family: var(--ff-mono); font-size: 0.7rem; color: var(--vermilion-ink);
  flex-shrink: 0;
}
.sg-index a:hover { color: var(--ink); background: var(--paper-2); }
@media (max-width: 900px) {
  .sg-index {
    position: sticky; top: 4.1rem; z-index: 20;
    background: var(--paper); padding-block: 0.65rem;
    margin-inline: calc(var(--pad-x) * -1); padding-inline: var(--pad-x);
    border-bottom: 1px solid var(--line);
  }
  .sg-index-title { display: none; }
  .sg-index ol {
    display: flex; gap: 0.4rem; overflow-x: auto; border-top: 0;
    padding-bottom: 0.2rem; -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .sg-index li { flex: 0 0 auto; }
  .sg-index a {
    border: 1px solid var(--line-2); border-radius: var(--radius);
    background: var(--paper-2); padding: 0.5rem 0.7rem;
    white-space: nowrap; font-size: 0.82rem; min-height: 2.4rem; align-items: center;
  }
}
.sg-report {
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: clamp(1.1rem, 3vw, 1.6rem);
  margin-bottom: 1rem; scroll-margin-top: 8rem;
}
.sg-report:last-child { margin-bottom: 0; }
.sg-report-head {
  display: flex; flex-wrap: wrap; gap: 0.5rem 0.9rem;
  align-items: baseline; justify-content: space-between;
  margin-bottom: 0.7rem; padding-bottom: 0.7rem; border-bottom: 1px solid var(--line);
}
.sg-report h3 {
  font-family: var(--ff-display); font-size: clamp(1.15rem, 2.8vw, 1.4rem);
  font-weight: 600; color: var(--ink); letter-spacing: -0.015em; line-height: 1.25;
}
.sg-report-tag {
  font-family: var(--ff-mono); font-size: 0.66rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--vermilion-ink);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0.25rem 0.5rem; background: var(--paper); white-space: nowrap;
}
.sg-report p:not([class]) { font-size: 0.96rem; color: var(--steel); margin-bottom: 0.8rem; }
.sg-terrain {
  font-family: var(--ff-mono); font-size: 0.74rem; color: var(--steel);
  background: var(--paper); border-inline-start: 2px solid var(--vermilion);
  padding: 0.5rem 0.7rem; margin-bottom: 0.9rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.sg-exp { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.5rem; }
@media (max-width: 640px) { .sg-exp { grid-template-columns: 1fr 1fr; } }
.sg-exp-cell {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0.55rem 0.6rem 0.6rem; background: var(--paper);
}
.sg-exp-key {
  display: block; font-family: var(--ff-mono); font-size: 0.62rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel);
  margin-bottom: 0.35rem;
}
.sg-exp-val { display: block; font-size: 0.84rem; font-weight: 500; color: var(--ink); line-height: 1.35; }
.sg-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px;
  margin-top: 0.9rem; height: 8px;
}
.sg-bar span { background: var(--line-2); border-radius: 1px; }
.sg-bar span.on { background: var(--vermilion); }
.sg-bar-note {
  font-family: var(--ff-mono); font-size: 0.66rem; color: var(--steel);
  margin-top: 0.4rem;
}

/* --- 4. Technology ladder --- */
.sg-tech { background: var(--paper-2); border-block: 1px solid var(--line); padding-block: clamp(2.5rem, 6.5vw, 4.5rem); }
.sg-ladder {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem;
  margin-top: clamp(1.25rem, 3.5vw, 2rem);
}
@media (max-width: 860px) { .sg-ladder { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .sg-ladder { grid-template-columns: 1fr; } }
.sg-step {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper); padding: 1rem 1.05rem 1.1rem;
  display: flex; flex-direction: column; gap: 0.4rem;
  position: relative;
}
.sg-step:nth-child(1) { margin-top: 2.25rem; }
.sg-step:nth-child(2) { margin-top: 1.5rem; }
.sg-step:nth-child(3) { margin-top: 0.75rem; }
@media (max-width: 860px) { .sg-step { margin-top: 0 !important; } }
.sg-step-gen {
  font-family: var(--ff-mono); font-size: 1.15rem; font-weight: 500;
  color: var(--vermilion-ink); letter-spacing: -0.02em;
}
.sg-step h3 {
  font-family: var(--ff-display); font-size: 1rem; font-weight: 600; color: var(--ink);
  line-height: 1.3;
}
.sg-step p:not([class]) { font-size: 0.88rem; color: var(--steel); }
.sg-step-role {
  margin-top: auto; padding-top: 0.55rem; border-top: 1px solid var(--line);
  font-family: var(--ff-mono); font-size: 0.66rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--steel);
}
.sg-tradeoff {
  display: grid; grid-template-columns: 1fr 0.9fr; gap: clamp(1.25rem, 3.5vw, 2.5rem);
  align-items: center; margin-top: clamp(1.75rem, 4vw, 2.75rem);
  padding-top: clamp(1.5rem, 4vw, 2.25rem); border-top: 1px solid var(--line);
}
@media (max-width: 860px) { .sg-tradeoff { grid-template-columns: 1fr; } }
.sg-tradeoff h3 {
  font-family: var(--ff-display); font-size: clamp(1.2rem, 2.8vw, 1.5rem);
  font-weight: 600; color: var(--ink); letter-spacing: -0.015em; margin-bottom: 0.6rem;
}
.sg-tradeoff p:not([class]) { color: var(--steel); font-size: 0.96rem; margin-bottom: 0.8rem; }
.sg-figure {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper); padding: 0.9rem 0.9rem 0.7rem;
}
.sg-figure svg { width: 100%; height: auto; }
.sg-figure .sg-figcap {
  color: var(--steel); border-top-color: var(--line);
}

/* --- 5. Matrix --- */
.sg-matrix { padding-block: clamp(2.5rem, 6.5vw, 4.5rem); }
.sg-scrollhint {
  display: none; font-family: var(--ff-mono); font-size: 0.68rem;
  color: var(--steel); margin-bottom: 0.5rem;
}
@media (max-width: 780px) { .sg-scrollhint { display: block; } }
.sg-table-wrap {
  overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
  background:
    linear-gradient(to right, var(--paper-2) 30%, rgba(244, 245, 246, 0)) left / 2.5rem 100% no-repeat,
    linear-gradient(to left, var(--paper-2) 30%, rgba(244, 245, 246, 0)) right / 2.5rem 100% no-repeat,
    var(--paper-2);
}
.sg-table-wrap table { min-width: 46rem; }
.sg-table-wrap tbody th {
  background: var(--paper); color: var(--ink);
  font-family: var(--ff-body); font-size: 0.9rem; font-weight: 600;
  text-transform: none; letter-spacing: normal;
  border-inline-end: 1px solid var(--line);
}
.sg-table-wrap tbody tr:nth-child(even) th { background: var(--paper-2); }
.sg-table-wrap tbody tr:nth-child(even) td { background: var(--paper); }
.sg-note {
  font-size: 0.85rem; color: var(--steel); margin-top: 0.75rem;
  font-style: normal;
}

/* --- 6. Indoor (dark inverted) --- */
.sg-indoor {
  background: var(--ink); color: var(--paper);
  padding-block: clamp(2.5rem, 6.5vw, 4.5rem);
}
.sg-indoor .sg-eyebrow { margin-bottom: 0.75rem; }
.sg-indoor h2 {
  font-family: var(--ff-display); font-size: clamp(1.6rem, 3.6vw, 2.35rem);
  font-weight: 700; color: var(--paper-2); letter-spacing: -0.02em;
  line-height: 1.15; margin-bottom: 0.65rem; max-width: 30ch;
}
.sg-indoor-lead { color: var(--steel-2); max-width: 60ch; font-size: 1rem; }
.sg-indoor-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.85rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}
@media (max-width: 900px) { .sg-indoor-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .sg-indoor-grid { grid-template-columns: 1fr; } }
.sg-indoor-col {
  border: 1px solid rgba(255, 255, 255, 0.14); border-radius: var(--radius);
  background: var(--ink-3); padding: 1rem 1.05rem 1.1rem;
}
.sg-indoor-col h3 {
  font-family: var(--ff-display); font-size: 1rem; font-weight: 600;
  color: var(--paper-2); margin-bottom: 0.4rem; line-height: 1.3;
}
.sg-indoor-col p { font-size: 0.88rem; color: var(--steel-2); }
.sg-indoor-figure {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  border: 1px solid rgba(255, 255, 255, 0.14); border-radius: var(--radius);
  background: var(--ink-2); padding: 1rem 1rem 0.8rem;
}
.sg-indoor-figure svg { width: 100%; height: auto; }

/* --- 7. Factors stepper --- */
.sg-factors { background: var(--paper-2); border-block: 1px solid var(--line); padding-block: clamp(2.5rem, 6.5vw, 4.5rem); }
.sg-steps { counter-reset: sgstep; display: grid; gap: 0; margin-top: clamp(1.25rem, 3.5vw, 2rem); border-top: 1px solid var(--line); }
.sg-stepitem {
  counter-increment: sgstep;
  display: grid; grid-template-columns: 3.5rem 1fr;
  gap: 0 1rem; padding-block: 1.15rem;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 520px) { .sg-stepitem { grid-template-columns: 2.5rem 1fr; gap: 0 0.75rem; } }
.sg-stepitem::before {
  content: counter(sgstep, decimal-leading-zero);
  font-family: var(--ff-mono); font-size: 1.05rem; font-weight: 500;
  color: var(--vermilion-ink); grid-row: span 2; padding-top: 0.15rem;
}
.sg-stepitem h3 {
  font-family: var(--ff-display); font-size: 1.05rem; font-weight: 600;
  color: var(--ink); margin-bottom: 0.3rem;
}
.sg-stepitem p { font-size: 0.95rem; color: var(--steel); }

/* --- 8. FAQ --- */
.sg-faq { padding-block: clamp(2.5rem, 6.5vw, 4.5rem); }
.sg-faq-list { margin-top: clamp(1.25rem, 3.5vw, 2rem); border-top: 1px solid var(--line); }
.sg-faq details { border-bottom: 1px solid var(--line); }
.sg-faq summary {
  display: flex; gap: 0.75rem; align-items: flex-start;
  padding: 1rem 0.25rem; cursor: pointer; list-style: none;
  font-family: var(--ff-display); font-size: 1rem; font-weight: 500;
  color: var(--ink); min-height: 3rem;
}
.sg-faq summary::-webkit-details-marker { display: none; }
.sg-faq summary::after {
  content: "+"; margin-inline-start: auto; flex-shrink: 0;
  font-family: var(--ff-mono); font-size: 1.15rem; color: var(--vermilion-ink);
  line-height: 1.2;
}
.sg-faq details[open] summary::after { content: "\2013"; }
.sg-faq details[open] summary { color: var(--vermilion-ink); }
.sg-faq-a { padding: 0 0.25rem 1.15rem; }
.sg-faq-a p { font-size: 0.95rem; color: var(--steel); }
.sg-faq-a p + p { margin-top: 0.7rem; }

/* --- 9. Glossary --- */
.sg-glossary { background: var(--ink); color: var(--paper); padding-block: clamp(2.5rem, 6.5vw, 4.5rem); }
.sg-glossary h2 {
  font-family: var(--ff-display); font-size: clamp(1.6rem, 3.6vw, 2.35rem);
  font-weight: 700; color: var(--paper-2); letter-spacing: -0.02em; margin-bottom: 0.6rem;
}
.sg-glossary-lead { color: var(--steel-2); max-width: 56ch; }
.sg-dl {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0 clamp(1.25rem, 3vw, 2.5rem);
  margin-top: clamp(1.25rem, 3.5vw, 2rem);
}
@media (max-width: 760px) { .sg-dl { grid-template-columns: 1fr; } }
.sg-dl-item {
  padding-block: 0.85rem; border-bottom: 1px solid rgba(226, 69, 43, 0.28);
}
.sg-dl dt {
  font-family: var(--ff-mono); font-size: 0.82rem; font-weight: 500;
  color: var(--paper-2); letter-spacing: 0.02em; margin-bottom: 0.25rem;
}
.sg-dl dd { font-size: 0.9rem; color: var(--steel-2); margin: 0; }

/* --- 10. Article feed --- */
.sg-guides { padding-block: clamp(2.5rem, 6.5vw, 4.5rem); }
.sg-feed {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem;
  margin-top: clamp(1.25rem, 3.5vw, 2rem);
}
@media (max-width: 900px) { .sg-feed { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .sg-feed { grid-template-columns: 1fr; } }
.sg-card {
  display: flex; flex-direction: column; gap: 0.5rem;
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.15rem 1.2rem 1.25rem;
  text-decoration: none; color: inherit;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.sg-card:hover {
  border-color: var(--line-2); transform: translateY(-2px);
  box-shadow: var(--shadow); color: inherit;
}
.sg-card-top {
  display: flex; justify-content: space-between; gap: 0.6rem;
  font-family: var(--ff-mono); font-size: 0.66rem; letter-spacing: 0.1em;
  text-transform: uppercase;
}
.sg-card-kicker { color: var(--vermilion-ink); }
.sg-card-time { color: var(--steel); white-space: nowrap; }
.sg-card h3 {
  font-family: var(--ff-display); font-size: 1.08rem; font-weight: 600;
  color: var(--ink); line-height: 1.3;
}
.sg-card p { font-size: 0.9rem; color: var(--steel); flex: 1; }
.sg-card-more { font-family: var(--ff-mono); font-size: 0.72rem; color: var(--vermilion-ink); }

/* --- 11. Contact band --- */
.sg-contact { background: var(--vermilion-wash); border-top: 1px solid rgba(226, 69, 43, 0.24); padding-block: clamp(2.5rem, 6.5vw, 4rem); }
.sg-contact-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.25rem, 3.5vw, 2.5rem); align-items: start;
}
@media (max-width: 760px) { .sg-contact-grid { grid-template-columns: 1fr; } }
.sg-contact h2 {
  font-family: var(--ff-display); font-size: clamp(1.5rem, 3.2vw, 2.05rem);
  font-weight: 700; color: var(--ink); letter-spacing: -0.02em; margin-bottom: 0.6rem;
}
.sg-contact p:not([class]) { color: var(--steel); margin-bottom: 1rem; max-width: 52ch; }
.sg-contact-card {
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.15rem 1.25rem 1.25rem;
}
.sg-contact-dl { display: grid; gap: 0.7rem; }
.sg-contact-dl dt {
  font-family: var(--ff-mono); font-size: 0.66rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--steel); margin-bottom: 0.15rem;
}
.sg-contact-dl dd { margin: 0; font-size: 0.95rem; font-weight: 500; color: var(--ink); }
.sg-contact-dl a { color: var(--vermilion-ink); text-decoration: none; }
.sg-contact-dl a:hover { text-decoration: underline; }

/* --- shared section heading for sg sections --- */
.sg-head { max-width: 46rem; }
.sg-head h2 {
  font-family: var(--ff-display); font-size: clamp(1.6rem, 3.6vw, 2.35rem);
  font-weight: 700; color: var(--ink); letter-spacing: -0.02em;
  line-height: 1.15; margin-bottom: 0.6rem; text-wrap: balance;
}
.sg-head p:not([class]) { color: var(--steel); font-size: 1rem; }
/* .sg-eyebrow defaults to the on-dark colour; these two sections are light. */
.sg-head .sg-eyebrow,
.sg-contact .sg-eyebrow { color: var(--vermilion-ink); }
.sg-head .sg-eyebrow::before,
.sg-contact .sg-eyebrow::before { background: var(--vermilion); }