/* ==========================================================================
   Characteristics.in — design tokens
   Concept: a trustworthy library index / field-guide catalog.
   Ink on paper, rule lines instead of boxed cards, serif headwords.
   ========================================================================== */

:root {
  --paper: #F8F7F3;
  --paper-dim: #F1EFE8;
  --ink: #20241E;
  --ink-soft: #4B4F45;
  --ochre: #B87A1E;
  --ochre-dark: #8F5E14;
  --teal: #2F5D50;
  --rule: #DAD5C3;
  --rule-strong: #C7C0A6;
  --white: #FFFFFF;
  --max-width: 1140px;
  --font-serif: "Source Serif 4", "Iowan Old Style", "Georgia", serif;
  --font-sans: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 2px;
}

img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
}
h1 { font-size: clamp(2.1rem, 4.5vw, 3.1rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; max-width: 68ch; }
.no-max { max-width: none; }

/* -------------------------------------------------- Header -------------- */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 40;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 16px;
  padding-bottom: 16px;
}
.wordmark {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}
.wordmark span { color: var(--ochre); }
.main-nav {
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
}
.main-nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.main-nav a:hover { color: var(--ochre-dark); text-decoration: none; }
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .main-nav { display: none; }
  .nav-toggle {
    display: inline-flex;
    background: none;
    border: 1px solid var(--rule-strong);
    border-radius: 3px;
    padding: 6px 10px;
    font-family: var(--font-sans);
    color: var(--ink);
    cursor: pointer;
  }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    padding: 12px 24px 20px;
    gap: 12px;
  }
}

/* -------------------------------------------------- Hero ----------------- */
.hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--rule);
}
.hero .eyebrow-line {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin-bottom: 18px;
}
.hero .eyebrow-line::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--ochre);
  display: inline-block;
}
.hero h1 { max-width: 16ch; }
.hero .lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 52ch; }

.search-drawer {
  margin-top: 30px;
  max-width: 560px;
  border: 1px solid var(--rule-strong);
  background: var(--white);
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 4px 4px 4px 16px;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.search-drawer:focus-within {
  border-color: var(--ochre);
  box-shadow: 0 0 0 3px rgba(184, 122, 30, 0.12);
}
.search-drawer input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 1rem;
  padding: 12px 8px;
  font-family: var(--font-sans);
  background: transparent;
  color: var(--ink);
}
.search-drawer button {
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 3px;
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  cursor: pointer;
}
.search-drawer button:hover { background: var(--ochre-dark); }
.search-results {
  max-width: 560px;
  margin-top: 6px;
  border: 1px solid var(--rule);
  border-top: none;
  background: var(--white);
  display: none;
}
.search-results.active { display: block; }
.search-results a {
  display: block;
  padding: 10px 16px;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  font-size: 0.95rem;
}
.search-results a:last-child { border-bottom: none; }
.search-results a:hover { background: var(--paper-dim); text-decoration: none; }
.search-empty { padding: 10px 16px; color: var(--ink-soft); font-size: 0.9rem; }

/* -------------------------------------------------- Stat strip ----------- */
.stat-strip {
  margin-top: 40px;
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  border-top: 1px solid var(--rule);
  padding-top: 24px;
}
.stat { display: flex; flex-direction: column; }
.stat-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--ochre-dark);
  line-height: 1;
}
.stat-label { font-size: 0.85rem; color: var(--ink-soft); margin-top: 4px; }

/* -------------------------------------------------- CTA section ---------- */
.cta-section { padding-top: 0; }
.cta-box {
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  padding: 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
  background: var(--white);
}
.cta-box h2 { margin-bottom: 6px; }
.cta-links { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.cta-btn {
  background: var(--ink);
  color: var(--paper);
  padding: 11px 20px;
  border-radius: 3px;
  font-size: 0.95rem;
  white-space: nowrap;
}
.cta-btn:hover { background: var(--ochre-dark); text-decoration: none; }
.cta-link { font-size: 0.88rem; }
@media (max-width: 640px) { .cta-box { flex-direction: column; align-items: flex-start; } }

/* -------------------------------------------------- Section rule --------- */
.section { padding: 56px 0; border-bottom: 1px solid var(--rule); }
.section:last-of-type { border-bottom: none; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}
.section-head h2 { margin-bottom: 4px; }
.section-head .see-all { font-size: 0.9rem; white-space: nowrap; }
.section-sub { color: var(--ink-soft); margin: 0; }

/* -------------------------------------------------- Category grid -------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
}
.cat-tile {
  padding: 22px 20px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  transition: background 0.15s ease;
}
.cat-tile:hover { background: var(--paper-dim); text-decoration: none; }
.cat-tile:nth-child(3n) { border-right: none; }
.cat-tile .cat-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink);
  display: block;
  margin-bottom: 6px;
}
.cat-tile .cat-desc { color: var(--ink-soft); font-size: 0.9rem; margin: 0; }
.cat-tile .cat-count { color: var(--ochre-dark); font-size: 0.82rem; margin-top: 8px; display: block; }

@media (max-width: 720px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-tile:nth-child(3n) { border-right: 1px solid var(--rule); }
  .cat-tile:nth-child(2n) { border-right: none; }
}
@media (max-width: 480px) {
  .cat-grid { grid-template-columns: 1fr; }
  .cat-tile { border-right: none !important; }
}

/* -------------------------------------------------- Entry list ----------- */
.entry-list { border-top: 1px solid var(--rule); }
.entry-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}
.entry-row .entry-title { font-family: var(--font-serif); font-size: 1.08rem; color: var(--ink); }
.entry-row .entry-title:hover { color: var(--ochre-dark); }
.entry-row .entry-cat { color: var(--ink-soft); font-size: 0.85rem; white-space: nowrap; }

/* -------------------------------------------------- Trust grid ----------- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  border-top: 1px solid var(--rule);
  padding-top: 30px;
}
.trust-item { padding-right: 10px; }
.trust-num {
  font-family: var(--font-serif);
  color: var(--ochre-dark);
  font-size: 1.1rem;
  display: block;
  margin-bottom: 8px;
}
.trust-item h3 { font-size: 1.05rem; margin-bottom: 6px; }
.trust-item p { color: var(--ink-soft); font-size: 0.92rem; margin: 0; }
@media (max-width: 900px) { .trust-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .trust-grid { grid-template-columns: 1fr; } }

/* -------------------------------------------------- Mini disclaimer ------ */
.mini-disclaimer-section { padding-top: 0; padding-bottom: 40px; border-bottom: none; }
.mini-disclaimer {
  border: 1px solid var(--rule-strong);
  border-left: 3px solid var(--ochre);
  background: var(--paper-dim);
  padding: 16px 20px;
  border-radius: 3px;
}
.mini-disclaimer p { margin: 0; font-size: 0.88rem; color: var(--ink-soft); max-width: none; }
.mini-disclaimer a { color: var(--teal); }

/* -------------------------------------------------- Journal / blog cards - */
.journal-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.journal-card {
  border-top: 3px solid var(--ochre);
  padding-top: 14px;
}
.journal-date {
  font-size: 0.82rem;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.journal-card h3 { margin: 6px 0 8px; }
.journal-card h3 a { color: var(--ink); }
.journal-card h3 a:hover { color: var(--ochre-dark); text-decoration: none; }
.journal-card p { color: var(--ink-soft); font-size: 0.95rem; }
.journal-card .read-link { font-size: 0.9rem; }
@media (max-width: 720px) { .journal-list { grid-template-columns: 1fr; } }

/* -------------------------------------------------- Entry page ----------- */
.entry-header { padding: 48px 0 32px; border-bottom: 1px solid var(--rule); }
.breadcrumb { font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 18px; }
.breadcrumb a { color: var(--ink-soft); }
.entry-header .updated { font-size: 0.85rem; color: var(--ink-soft); margin-top: 14px; }
.entry-header .lede { font-size: 1.1rem; color: var(--ink-soft); }

.trait-list { counter-reset: trait; margin-top: 8px; }
.trait-item {
  counter-increment: trait;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}
.trait-item:first-child { border-top: 1px solid var(--rule); }
.trait-item::before {
  content: counter(trait, decimal-leading-zero);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--ochre-dark);
}
.trait-item h3 { margin-bottom: 6px; }
.trait-item p { margin: 0; color: var(--ink-soft); max-width: 62ch; }

.faq-block { margin-top: 8px; }
.faq-item { border-bottom: 1px solid var(--rule); padding: 18px 0; }
.faq-item:first-child { border-top: 1px solid var(--rule); }
.faq-item h3 { font-family: var(--font-sans); font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.faq-item p { color: var(--ink-soft); margin: 0; }

.related-box {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.related-box a {
  border: 1px solid var(--rule-strong);
  padding: 8px 14px;
  border-radius: 3px;
  font-size: 0.9rem;
  color: var(--ink);
}
.related-box a:hover { border-color: var(--ochre); color: var(--ochre-dark); text-decoration: none; }

/* -------------------------------------------------- Blog post page ------- */
.post-body { padding: 8px 0 0; }
.post-body h2 { margin-top: 1.4em; }
.post-body p { max-width: 68ch; }

/* -------------------------------------------------- Legal / simple pages - */
.simple-page { padding: 48px 0 64px; }
.simple-page h2 { margin-top: 1.6em; }
.simple-page ul { padding-left: 1.2em; }
.simple-page li { margin-bottom: 0.5em; }
.last-updated { color: var(--ink-soft); font-size: 0.9rem; }

/* -------------------------------------------------- Contact --------------- */
.contact-card { border: 1px solid var(--rule); padding: 28px; border-radius: 4px; max-width: 480px; background: var(--white); }
.contact-card a { display: block; margin-top: 10px; font-family: var(--font-serif); font-size: 1.1rem; }

/* -------------------------------------------------- Sitemap page --------- */
.sitemap-cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.sitemap-cols h3 { border-bottom: 1px solid var(--rule); padding-bottom: 8px; }
.sitemap-cols ul { list-style: none; padding: 0; margin: 0; }
.sitemap-cols li { padding: 6px 0; border-bottom: 1px solid var(--rule); }
@media (max-width: 640px) { .sitemap-cols { grid-template-columns: 1fr; } }

/* -------------------------------------------------- Footer ---------------- */
.site-footer { background: var(--ink); color: #E8E5D8; padding: 48px 0 28px; margin-top: 0; position: relative; }
.site-footer a { color: #E8E5D8; }
.site-footer a:hover { color: var(--ochre); text-decoration: none; }

.footer-top { padding-bottom: 26px; }
.footer-top .wordmark { color: #E8E5D8; font-size: 1.3rem; }
.footer-top .wordmark span { color: var(--ochre); }
.footer-top p { color: #B9B6A6; font-size: 0.92rem; margin-top: 10px; max-width: 62ch; }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  padding: 26px 0;
  border-top: 1px solid #3A3E33;
  border-bottom: 1px solid #3A3E33;
}
.footer-grid h4 {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  text-transform: none;
  color: #B9B6A6;
  margin: 0 0 12px;
  font-weight: 600;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 8px; font-size: 0.92rem; }

/* -------------------------------------------------- Sub-footer ----------- */
.sub-footer {
  padding: 26px 0;
  border-bottom: 1px solid #3A3E33;
  text-align: center;
}
.sub-footer > h4 {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: #82806E;
  margin: 0 0 18px;
  font-weight: 600;
}
.sub-footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  max-width: 900px;
  margin: 0 auto;
}
.sub-footer-links a { font-size: 0.82rem; color: #C9C6B6; line-height: 1.8; }
.sub-footer-links a:hover { color: var(--ochre); }

.footer-disclaimer-line {
  padding-top: 20px;
  font-size: 0.85rem;
  color: #9B9884;
  max-width: 80ch;
}
.footer-disclaimer-line strong { color: #C9C6B6; }
.footer-disclaimer-line a { color: #C9C6B6; text-decoration: underline; }

.footer-bottom {
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.85rem;
  color: #9B9884;
}
@media (max-width: 820px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--ochre-dark);
  color: var(--paper) !important;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  z-index: 50;
}
.back-to-top:hover { background: var(--ochre); text-decoration: none !important; }

/* -------------------------------------------------- 404 ------------------ */
.error-page { padding: 100px 0; text-align: left; }
.error-page .code { font-family: var(--font-serif); font-size: 1rem; color: var(--ochre-dark); }

/* -------------------------------------------------- Utility --------------- */
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper); padding: 8px 14px; z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }