/*
 * Guide Library template adaptation.
 * Source: SGMS template library / Guide Library.
 * Content and semantic markup remain site-owned; this layer carries the
 * template's paper palette, editorial scale, knowledge cards and sticky TOC.
 */
:root {
  color-scheme: light;
  --ink: #24211f;
  --muted: #756f69;
  --line: #e3ddd5;
  --paper: #fbf8f2;
  --card: #ffffff;
  --orange: #d65f36;
  --blue: #385f93;
  --bg: var(--paper);
  --bg-deep: var(--ink);
  --surface: var(--card);
  --surface-strong: #f0e7d8;
  --surface-soft: var(--card);
  --text: var(--ink);
  --accent: var(--orange);
  --accent-strong: #b94725;
  --accent-soft: #f3ddd4;
  --warning: var(--blue);
  --warning-soft: #e2ebf3;
  --border: var(--line);
  --border-strong: #c8bdb0;
  --shadow: none;
  --radius: 1.125rem;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, "Noto Sans TC", "Noto Sans", "Segoe UI", sans-serif;
  line-height: 1.65;
}

body::before { display: none; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
.skip-link { transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.shell { width: min(1160px, calc(100% - 36px)); }
.reading-shell { width: min(1040px, calc(100% - 36px)); }

.site-header {
  border-bottom: 1px solid rgba(227, 221, 213, 0.78);
  background: rgba(251, 248, 242, 0.94);
  backdrop-filter: blur(16px);
}

.nav { min-height: 5rem; }
.brand { color: var(--ink); font-size: 1.05rem; font-weight: 900; letter-spacing: -0.02em; }
.brand-mark {
  width: 2.15rem;
  height: 2.15rem;
  border: 0;
  border-radius: 0.25rem;
  background:
    linear-gradient(var(--orange) 0 0) 0 0 / 46% 46% no-repeat,
    linear-gradient(var(--blue) 0 0) 100% 0 / 46% 46% no-repeat,
    linear-gradient(#e4c7b8 0 0) 0 100% / 46% 46% no-repeat,
    linear-gradient(#aab69b 0 0) 100% 100% / 46% 46% no-repeat;
  color: transparent;
  font-size: 0;
  transform: rotate(-4deg);
}
.brand > span:last-child { display: grid; line-height: 1.05; }
.brand > span:last-child::after { margin-top: 0.28rem; color: var(--muted); content: "FIELD LIBRARY"; font-size: 0.52rem; font-weight: 800; letter-spacing: 0.17em; }
.nav-links { gap: 0.5rem; }
.nav-links a { border-radius: 0.55rem; color: var(--muted); font-size: 0.82rem; }
.nav-links a:hover { background: #fff; color: var(--ink); }

.eyebrow,
.article-tag,
.path-number,
.article-card .number {
  color: var(--orange);
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

h1, h2, h3 { color: var(--ink); letter-spacing: -0.05em; }
h1 { font-size: clamp(2.7rem, 6vw, 4.8rem); line-height: 1.05; }
h1 span { color: var(--orange); }
h2 { line-height: 1.12; }
.lead,
.card p,
.step p,
.checklist p,
.article-body p,
.article-body li,
dd { color: var(--muted); }

.hero { padding: 3.5rem 0 4.5rem; }
.hero-grid { grid-template-columns: minmax(0, 1fr) 340px; gap: 3rem; }
.hero h1 { max-width: 12ch; }
.actions .button,
.button {
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: var(--card);
  color: var(--ink);
}
.actions .button:hover,
.button:hover { border-color: #c8bdb0; background: #fff; }
.actions .button-primary { border-color: var(--orange); background: var(--orange); color: #fff; }
.actions .button-primary:hover { background: #b94725; color: #fff; }

.signal-panel {
  padding: 1.125rem;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: var(--card);
  box-shadow: none;
  transform: rotate(1.5deg);
}
.signal-panel::after { display: none; }
.panel-kicker { border-color: var(--line); color: var(--muted); }
.status-dot { background: var(--orange); box-shadow: none; }
.signal-list { gap: 0.625rem; margin-top: 0.625rem; }
.signal-list li {
  min-height: 5.5rem;
  padding: 0.85rem;
  border: 0;
  border-radius: 0.875rem;
  background: #f0e7d8;
}
.signal-list li:nth-child(2) { background: #e2ebf3; }
.signal-list li:nth-child(3) { background: #e7ebdd; }
.signal-number { color: var(--blue); }
.signal-list span:last-child { color: var(--muted); }

.principle-strip,
.reading-order {
  gap: 0.625rem;
  padding: 1.125rem;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: var(--card);
}
.principle,
.reading-order div {
  min-height: 5.75rem;
  padding: 0.9rem;
  border: 0;
  border-radius: 0.875rem;
  background: #f0e7d8;
}
.principle:nth-child(2),
.reading-order div:nth-child(2) { background: #e2ebf3; }
.principle:nth-child(3),
.reading-order div:nth-child(3) { background: #f3ddd4; }
.reading-order div:nth-child(4) { background: #e7ebdd; }
.reading-order b { color: var(--blue); }

section { padding-block: clamp(3.75rem, 8vw, 6.5rem); }
.section-label,
.meta-chip { border-color: var(--line); background: rgba(255, 255, 255, 0.58); color: var(--muted); }
.card,
.step,
.article-card,
.faq-list details,
.article-nav a,
.table-wrap {
  border-color: var(--line);
  background: var(--card);
  box-shadow: none;
}
.card:hover,
.article-card:hover,
.article-nav a:hover { border-color: #c8bdb0; background: #fff; }
.path-card { min-height: 21rem; }
.path-card:nth-child(2n),
.article-card:nth-child(4n + 2) { border-top: 4px solid #e2ebf3; }
.path-card:first-child,
.article-card:nth-child(4n + 1) { border-top: 4px solid #f0e7d8; }
.article-card:nth-child(4n + 3) { border-top: 4px solid #f3ddd4; }
.article-card:nth-child(4n) { border-top: 4px solid #e7ebdd; }
.path-preview li::before { color: var(--orange); content: "—"; }
.path-link,
.article-action,
.article-card .read { color: var(--orange); }
.step-index { border: 0; background: #f3ddd4; color: var(--orange); }

.safety-section {
  border-color: var(--line);
  border-radius: 1.5rem;
  background: #fff;
}
.checklist { border-color: var(--line); }
.checklist li { border-color: var(--line); }
.check-mark { background: var(--blue); color: #fff; }
.term-kind { color: var(--blue); }
dt { color: var(--orange); }
.warning { border-color: var(--line); background: #e2ebf3; }
.warning-title { color: var(--ink); }
.warning p { color: #4e6176; }

.hub-hero {
  padding: clamp(3.5rem, 8vw, 6rem) 0 4.5rem;
  border-bottom: 1px solid var(--line);
}
.hub-hero h1 { max-width: 14ch; }
.hub-hero .reading-order { margin-top: 2.5rem; }
.article-list { padding-top: 4rem; }
.article-grid { gap: 0.875rem; }
.article-card { min-height: 17rem; padding: 1.5rem; }
.article-card h2 { margin-top: 2rem; font-size: clamp(1.4rem, 3vw, 1.85rem); }
.category-grid .category-card { min-height: 17rem; }
.category-grid .category-card h2,
.category-grid .category-card h3 { margin-top: 2rem; }

.library-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.62fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.library-heading h2 { margin: 0; }
.library-heading > p { max-width: 34rem; margin: 0; color: var(--muted); }
.library-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); align-items: start; gap: 2.375rem; }
.library-nav {
  position: sticky;
  top: 6.5rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--card);
}
.library-nav > strong { display: block; padding: 1rem; color: var(--ink); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; }
.library-nav a {
  display: grid;
  grid-template-columns: 1.5rem 1fr auto;
  align-items: center;
  gap: 0.5rem;
  min-height: 3.75rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid #eee8e0;
  color: var(--muted);
  text-decoration: none;
}
.library-nav a:hover { background: #fffaf3; color: var(--ink); }
.library-nav a span { color: var(--orange); font: 900 0.68rem/1 ui-monospace, "Cascadia Code", monospace; }
.library-nav a strong { color: inherit; font-size: 0.78rem; }
.library-nav a small { color: #9b938b; font-size: 0.66rem; white-space: nowrap; }
.library-catalog { min-width: 0; }
.library-group { padding: 0 0 4.5rem; }
.library-group + .library-group { padding-top: 4.5rem; border-top: 1px solid var(--line); }
.library-group-head {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(17rem, 1fr);
  align-items: end;
  gap: 2rem;
  margin-bottom: 1.5rem;
}
.library-group-head h2 { margin: 0.45rem 0 0; font-size: clamp(1.8rem, 4vw, 2.7rem); }
.library-group-head p { margin: 0; color: var(--muted); }
.category-code { color: var(--orange); font: 900 0.68rem/1 ui-monospace, "Cascadia Code", monospace; letter-spacing: 0.12em; }

.article-hero {
  padding: clamp(3.5rem, 8vw, 6rem) 0 3.25rem;
  border-color: var(--line);
}
.article-hero h1 { max-width: 22ch; }
.article-layout { grid-template-columns: minmax(0, 1fr) 15rem; gap: clamp(2rem, 6vw, 4.25rem); }
.article-body { max-width: 46rem; }
.article-cover img { border-color: var(--line); border-radius: 1.125rem; box-shadow: none; }
.toc {
  top: 6.5rem;
  padding: 1.125rem;
  border-color: var(--line);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.94);
}
.toc strong { color: var(--ink); }
.toc a { border-top: 1px solid #eee8e0; color: var(--muted); }
.toc li:first-child a { border-top: 0; }
.toc a:hover,
.sources a,
.footer-grid a,
.back-to-top { color: var(--orange); }
.answer-first { color: var(--ink) !important; }
.callout { border-color: #d8b7aa; background: #f3ddd4; }
.callout.warning { border-color: #b8cadc; background: #e2ebf3; }
.callout strong { color: var(--orange); }
.callout.warning strong { color: var(--blue); }
.fact-list p { border-color: var(--orange); background: #fff; }
.byline { border-color: var(--line); background: #f0e7d8; }
.sources { border-color: var(--ink); }
footer { border-color: var(--line); }

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .signal-panel { max-width: 38rem; transform: none; }
  .library-heading,
  .library-group-head { grid-template-columns: 1fr; gap: 1rem; }
  .library-layout { grid-template-columns: 1fr; }
  .library-nav { position: static; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .library-nav > strong { grid-column: 1 / -1; }
}

@media (max-width: 800px) {
  .article-layout { grid-template-columns: 1fr; }
  .toc { position: static; order: -1; }
}

@media (max-width: 680px) {
  .shell,
  .reading-shell { width: min(100% - 24px, 1160px); }
  .site-header { position: static; }
  .hero { padding-top: 2.5rem; }
  .hero h1 { font-size: clamp(2.8rem, 16vw, 4.5rem); }
  .signal-panel { display: none; }
  .principle-strip,
  .reading-order { grid-template-columns: 1fr; }
  .principle,
  .reading-order div { min-height: auto; }
  .article-card { min-height: 14rem; }
  .library-nav { grid-template-columns: 1fr; }
  .library-group + .library-group { padding-top: 3.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .signal-panel { transform: none; }
}