/* ──────────────────────────────────────────────────────────
   FlatLabs · Glossary stylesheet
   Editorial system shared across /learn/ pages.
   Matches landing/app: warm off-white, coral accent,
   Playfair Display + DM Sans + JetBrains Mono.
   ────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Neutrals */
  --ink:          #111111;
  --ink-soft:     #6B7280;
  --ink-faint:    #9CA3AF;
  --rule:         #E8E8E3;
  --rule-soft:    rgba(17,17,17,.06);
  --surface:      #FFFFFF;
  --surface-paper:#F7F7F5;
  --surface-card: #F7F7F5;
  --surface-dark: #111111;

  /* Coral accent system */
  --accent:       #FF6B57;
  --accent-hover: #E85946;
  --accent-deep:  #C24433;
  --accent-text:  #FFFFFF;
  --accent-soft:  rgba(255,107,87,.10);
  --accent-soft-2: rgba(255,107,87,.16);

  /* Functional accents (used sparingly) */
  --cyan:         #00AEEF;
  --cyan-soft:    #EAF7FD;
  --lime:         #C6FF3D;
  --lime-soft:    #F4FFE3;

  --serif: 'Playfair Display', Georgia, serif;
  --sans:  'DM Sans', -apple-system, sans-serif;
  --mono:  'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --ease:  cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--sans);
  background: var(--surface);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
::selection { background: var(--lime); color: var(--ink); }

/* ── NAV ── */
nav.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0 40px;
  height: 64px;
  background: rgba(252,252,250,.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--rule);
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  font-family: var(--sans);
  font-size: 18px; font-weight: 700;
  letter-spacing: -.5px; color: var(--ink);
  text-decoration: none;
}
.logo em { font-style: normal; color: var(--accent); }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a {
  font-size: 13px; color: var(--ink-soft);
  text-decoration: none; font-weight: 500;
  letter-spacing: .1px;
  transition: color .2s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); font-weight: 600; }
.nav-cta {
  background: var(--ink); color: white !important;
  padding: 10px 22px; border-radius: 100px;
  font-size: 12px !important; font-weight: 600 !important;
  letter-spacing: .2px;
  transition: background .25s var(--ease) !important;
}
.nav-cta:hover { background: var(--accent) !important; color: white !important; }

/* ── LAYOUT ── */
.container { max-width: 1000px; margin: 0 auto; padding: 0 40px; }
.container--narrow { max-width: 760px; }

/* ── BREADCRUMB ── */
.breadcrumb { padding: 96px 0 0; }
.breadcrumb-trail {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .5px;
  text-transform: uppercase;
  font-weight: 500;
}
.breadcrumb-trail a,
.breadcrumb-trail span.crumb-static {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color .2s;
}
.breadcrumb-trail a:hover { color: var(--accent); }
.breadcrumb-trail span.crumb-static {
  /* non-functional crumb — folder without index */
  cursor: default;
}
.breadcrumb-trail a[aria-current="page"],
.breadcrumb-trail span[aria-current="page"] {
  color: var(--ink);
  pointer-events: none;
}
.breadcrumb-trail .sep { color: var(--ink-faint); font-size: 9px; }

/* ── HERO (index) ── */
.learn-hero {
  padding: 140px 0 60px;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 80px;
  align-items: end;
}
.kicker {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 1px; text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 28px;
}
.kicker::before {
  content: ''; display: block;
  width: 28px; height: 1px;
  background: var(--accent);
}
.learn-hero h1 {
  font-family: var(--serif);
  font-size: clamp(48px, 6.4vw, 88px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2.4px;
  color: var(--ink);
  margin-bottom: 28px;
  text-wrap: balance;
}
.learn-hero h1 em {
  font-style: italic; font-weight: 400;
  color: var(--ink-soft);
}
.learn-hero .lede {
  font-size: 17px;
  color: var(--ink-soft);
  line-height: 1.65;
  max-width: 480px;
}

.stats-row {
  display: grid;
  grid-template-rows: repeat(3, auto);
  gap: 24px;
  padding-bottom: 16px;
}
.stat { display: grid; grid-template-columns: 56px 1fr; gap: 16px; align-items: baseline; }
.stat-num {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -1.8px;
  line-height: 1;
  text-align: right;
}
.stat-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  font-weight: 500;
  letter-spacing: .5px;
  text-transform: uppercase;
  border-left: 1px solid var(--rule);
  padding-left: 16px;
  line-height: 1.4;
}

/* ── TABS ── */
.tabs-wrap {
  position: sticky; top: 64px; z-index: 50;
  background: rgba(252,252,250,.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--rule);
  border-top: 1px solid var(--rule);
}
.tabs-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 40px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.tabs-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
  flex-shrink: 0;
}
.gl-tabs { display: flex; flex-wrap: wrap; gap: 6px; flex: 1; }
.gl-tab {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--rule);
  border-radius: 100px;
  background: #fff;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .2s var(--ease);
  white-space: nowrap;
}
.gl-tab:hover { border-color: var(--ink); color: var(--ink); }
.gl-tab.active {
  background: var(--ink);
  border-color: var(--ink);
  color: white;
}
.gl-tab-count {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  opacity: .55;
}
.gl-tab.active .gl-tab-count { opacity: 1; color: var(--accent); }

/* ── GLOSSARY GRID ── */
.grid-section { padding: 56px 0 96px; }
.section-heading {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  margin-bottom: 32px; padding-bottom: 16px;
  border-bottom: 1px solid var(--rule-soft);
}
.section-heading h2 {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--ink);
}
.section-heading h2 em { font-style: italic; font-weight: 400; color: var(--ink-soft); }
.section-count {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .5px;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.gl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  min-height: 280px;
}
.gl-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 22px 22px 18px;
  text-decoration: none;
  display: flex; flex-direction: column; gap: 10px;
  transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
  position: relative;
  overflow: hidden;
}
.gl-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(17,17,17,.06);
}
.gl-card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.gl-card-id {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--ink-soft);
  font-feature-settings: 'tnum' 1;
}
.gl-card-production {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: .3px;
}
.gl-card-name {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -.6px;
  margin-top: 4px;
}
.gl-card-tooltip { font-size: 13.5px; color: var(--ink-soft); line-height: 1.55; flex: 1; }
.gl-card-footer {
  display: flex; align-items: center; justify-content: flex-end;
  margin-top: 4px; padding-top: 12px;
  border-top: 1px solid var(--rule);
}
.gl-card-link {
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  color: var(--ink);
  text-transform: uppercase; letter-spacing: .5px;
  display: inline-flex; align-items: center; gap: 4px;
  transition: gap .2s, color .2s;
}
.gl-card:hover .gl-card-link { gap: 8px; color: var(--accent); }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── ARTICLE HEADER ── */
.article-header { padding: 32px 0 48px; border-bottom: 1px solid var(--rule); margin-bottom: 56px; }
.article-tag {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 1px; text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 28px;
  font-feature-settings: 'tnum' 1;
}
.article-tag::before { content: ''; display: block; width: 24px; height: 1px; background: var(--accent); }
.article-tag .sep { color: var(--ink-faint); font-weight: 400; }
.article-tag .id { color: var(--accent); }
.article-header h1 {
  font-family: var(--serif);
  font-size: clamp(40px, 5.6vw, 76px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2px;
  margin-bottom: 24px;
  color: var(--ink);
  text-wrap: balance;
}
.article-header h1 em { font-style: italic; font-weight: 400; color: var(--ink-soft); }
.article-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 24px 28px;
  background: var(--surface-paper);
  border: 1px solid var(--rule);
  border-radius: 14px;
  margin-top: 32px;
}
.meta-item { display: flex; flex-direction: column; gap: 6px; }
.meta-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--ink-soft);
}
.meta-value {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.2px;
  line-height: 1.3;
}

/* ── ARTICLE BODY ── */
.article-body { padding-bottom: 80px; }
.article-body section { margin-bottom: 56px; scroll-margin-top: 80px; }
.article-body h2 {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -.9px;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--ink);
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 16px;
  align-items: baseline;
}
.article-body h2::before {
  content: attr(data-num);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--accent);
  padding-top: 8px;
  border-top: 1px solid var(--accent);
  align-self: start;
  text-transform: uppercase;
}
.article-body section > p,
.article-body section > .spec-table,
.article-body section > .compare-grid,
.article-body section > .highlight,
.article-body section > .pro-note,
.article-body section > ul,
.article-body section > ol {
  padding-left: 76px;
}
.article-body section > p {
  font-size: 16.5px;
  color: var(--ink);
  line-height: 1.8;
  margin-bottom: 18px;
  max-width: 64ch;
}
.article-body section > p:last-child { margin-bottom: 0; }
.article-body strong { font-weight: 600; color: var(--ink); }

.article-body section > ul,
.article-body section > ol { margin-bottom: 18px; max-width: 64ch; }
.article-body section > ul { list-style: none; }
.article-body section > ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  font-size: 15.5px;
  line-height: 1.7;
}
.article-body section > ul li::before {
  content: '';
  position: absolute; left: 4px; top: 12px;
  width: 8px; height: 1.5px;
  background: var(--accent);
}
.article-body section > ol { padding-left: 100px; }
.article-body section > ol li { margin-bottom: 8px; font-size: 15.5px; line-height: 1.7; }

.article-body a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: color .2s;
}
.article-body a:hover { color: var(--accent); }

/* Lede block — editorial intro */
.lede-block { padding-bottom: 8px; margin-bottom: 40px; }
.lede-block p {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--ink);
  letter-spacing: -.5px;
  margin-bottom: 20px;
  max-width: 60ch;
  text-wrap: balance;
}
.lede-block p:last-child { margin-bottom: 0; }
.lede-block p em { color: var(--ink-soft); font-style: italic; }
.lede-block .lede-secondary {
  font-family: var(--sans);
  font-size: 16.5px;
  color: var(--ink-soft);
  line-height: 1.7;
  font-weight: 400;
  letter-spacing: 0;
}

/* Highlight box */
.highlight {
  padding: 24px 28px !important;
  background: var(--surface-paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  margin: 24px 0 24px 76px !important;
  max-width: calc(64ch + 76px);
}
.highlight .highlight-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 10px;
  display: block;
}
.highlight p {
  margin: 0 !important;
  color: var(--ink) !important;
  font-size: 15px !important;
  font-weight: 500;
  line-height: 1.6 !important;
  padding: 0 !important;
}
.highlight p + p { margin-top: 10px !important; }
.highlight p em { color: var(--accent); font-style: italic; font-weight: 500; }

/* Spec table */
.spec-table {
  width: calc(100% - 76px);
  border-collapse: collapse;
  margin: 24px 0 24px 76px !important;
  font-size: 14px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}
.spec-table th {
  text-align: left;
  padding: 12px 18px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--ink-soft);
  background: var(--surface-paper);
  border-bottom: 1px solid var(--rule);
}
.spec-table td {
  padding: 14px 18px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule-soft);
  line-height: 1.5;
  vertical-align: top;
}
.spec-table tr:last-child td { border-bottom: none; }
.spec-table td:first-child { font-weight: 600; color: var(--ink); }
.spec-table td:nth-child(2) {
  font-family: var(--mono);
  color: var(--ink);
  font-weight: 500;
  font-size: 13px;
}

/* Pro note (dark) */
.pro-note {
  padding: 28px 32px !important;
  background: var(--surface-dark);
  border-radius: 16px;
  margin: 40px 0 40px 76px !important;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 18px;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
}
.pro-note::before {
  content: 'PRO';
  position: absolute; top: -6px; right: -2px;
  font-family: var(--serif);
  font-size: 88px;
  font-weight: 900;
  color: rgba(255,255,255,.04);
  letter-spacing: -3px;
  line-height: 1;
  pointer-events: none;
}
.pro-note-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: white;
}
.pro-note-text { position: relative; }
.pro-note-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 10px;
  display: block;
}
.pro-note-text p {
  color: rgba(255,255,255,.8) !important;
  font-size: 14.5px !important;
  line-height: 1.65 !important;
  margin: 0 !important;
  padding: 0 !important;
  max-width: none !important;
}
.pro-note-text p + p { margin-top: 10px !important; }
.pro-note-text strong { color: white; font-weight: 600; }

/* Compare grid */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 24px 0 !important;
}
.compare-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 22px;
  transition: all .25s var(--ease);
}
.compare-card.active {
  border-color: var(--ink);
  background: #fff;
  box-shadow: 0 0 0 1px var(--ink) inset, 0 10px 26px rgba(17,17,17,.06);
  position: relative;
}
.compare-card.active::after {
  content: '';
  position: absolute; top: 0; left: 50%;
  transform: translate(-50%, -50%);
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--surface);
}
.compare-card-label {
  font-family: var(--mono);
  font-size: 10px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}
.compare-card.active .compare-card-label { color: var(--accent); }
.compare-card-name {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.4px;
  margin-bottom: 6px;
}
.compare-card-weight {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  font-weight: 500;
  font-feature-settings: 'tnum' 1;
  margin-bottom: 10px;
}
.compare-card-desc { font-size: 13px; color: var(--ink-soft); line-height: 1.55; }

/* ── CTA SECTION (dark) ── */
.cta-section {
  background: var(--surface-dark);
  color: white;
  border-radius: 24px;
  padding: 64px 56px;
  text-align: center;
  margin: 0 0 64px;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 100%, var(--accent-soft), transparent 60%);
  pointer-events: none;
}
.cta-section .kicker { color: rgba(255,255,255,.6); justify-content: center; position: relative; }
.cta-section .kicker::before { background: var(--accent); }
.cta-section h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  letter-spacing: -1.2px;
  line-height: 1.05;
  color: white;
  margin-bottom: 18px;
  position: relative;
  text-wrap: balance;
}
.cta-section h2 em { font-style: italic; font-weight: 400; color: var(--accent); }

/* CTA meta — beta badge + launch date */
.cta-meta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  margin-bottom: 8px;
  padding: 8px 16px 8px 14px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 100px;
  position: relative;
}
.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255,255,255,.85);
}
.cta-badge::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--accent-soft); }
  50%      { box-shadow: 0 0 0 7px rgba(255,107,87,.04); }
}
.cta-launch {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .5px;
  color: rgba(255,255,255,.6);
  padding-left: 14px;
  border-left: 1px solid rgba(255,255,255,.15);
}
.cta-section p {
  font-size: 16px;
  color: rgba(255,255,255,.7);
  margin-bottom: 32px;
  line-height: 1.65;
  max-width: 460px;
  margin-left: auto; margin-right: auto;
  position: relative;
}

/* Buttons */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: white;
  padding: 15px 28px; border-radius: 100px;
  font-size: 14px; font-weight: 600; text-decoration: none;
  transition: all .25s var(--ease);
  position: relative;
  border: none;
  cursor: pointer;
  font-family: var(--sans);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ── RELATED ── */
.related { margin-bottom: 96px; }
.related-header {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  margin-bottom: 24px; padding-bottom: 16px;
  border-bottom: 1px solid var(--rule-soft);
}
.related-header h3 {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -.7px;
  color: var(--ink);
}
.related-header h3 em { font-style: italic; font-weight: 400; color: var(--ink-soft); }
.related-header .label {
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: .5px; text-transform: uppercase;
  color: var(--ink-soft);
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.related-card {
  display: block;
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 22px;
  transition: all .25s var(--ease);
  position: relative;
}
.related-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(17,17,17,.06);
}
.related-card-cat {
  font-family: var(--mono);
  font-size: 10px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.related-card-name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.4px;
  margin-bottom: 6px;
}
.related-card-desc { font-size: 13px; color: var(--ink-soft); line-height: 1.55; }

/* ── FOOTER ── */
footer.site-footer {
  background: var(--surface-dark);
  color: rgba(255,255,255,.55);
  padding: 40px 40px;
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .3px;
  flex-wrap: wrap;
  gap: 16px;
}
footer.site-footer .footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
footer.site-footer a { color: rgba(255,255,255,.6); text-decoration: none; transition: color .2s; }
footer.site-footer a:hover { color: var(--accent); }

/* ── REVEAL (light — visuals only) ── */
.reveal {
  opacity: 0;
  transition: opacity .55s var(--ease);
}
.reveal.visible { opacity: 1; }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .container { padding: 0 28px; }
  nav.site-nav { padding: 0 24px; }
  .learn-hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 110px 0 48px;
    align-items: start;
  }
  .stats-row { grid-template-rows: auto; grid-template-columns: repeat(3, 1fr); padding-bottom: 0; }
  .stat { grid-template-columns: 1fr; gap: 4px; }
  .stat-num { text-align: left; font-size: 26px; }
  .stat-label { border-left: none; padding-left: 0; }

  .tabs-inner { padding: 14px 28px; flex-direction: column; align-items: flex-start; gap: 10px; }
  .gl-tabs { width: 100%; }
  .grid-section { padding: 40px 0 80px; }

  .article-meta { grid-template-columns: 1fr 1fr; gap: 18px; padding: 20px 22px; }
  .compare-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .article-body h2 { font-size: 24px; grid-template-columns: 44px 1fr; gap: 12px; }
  .article-body section > p,
  .article-body section > .spec-table,
  .article-body section > .compare-grid,
  .article-body section > .highlight,
  .article-body section > .pro-note,
  .article-body section > ul,
  .article-body section > ol { padding-left: 0; }
  .highlight, .pro-note, .spec-table { margin-left: 0 !important; width: 100%; }
  .spec-table { font-size: 13px; }
  .spec-table th, .spec-table td { padding: 10px 14px; }
  .pro-note { padding: 22px 22px !important; }
  .cta-section { padding: 40px 28px; }
}
@media (max-width: 600px) {
  nav.site-nav { padding: 0 16px; height: 56px; }
  .logo { font-size: 16px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-cta { padding: 8px 16px !important; font-size: 11px !important; }
  .container { padding: 0 20px; }
  .breadcrumb { padding: 80px 0 0; }
  .learn-hero { padding: 88px 0 40px; }
  .stats-row { grid-template-columns: 1fr 1fr; gap: 20px; }
  .tabs-wrap { top: 56px; }
  .tabs-inner { padding: 12px 20px; }
  .tabs-label { display: none; }
  .gl-grid { grid-template-columns: 1fr; }
  .gl-card { padding: 20px; }
  .section-heading { flex-direction: column; align-items: flex-start; gap: 4px; }
  .section-heading h2 { font-size: 28px; }

  .article-header { padding: 24px 0 36px; margin-bottom: 40px; }
  .article-body h2 { font-size: 26px; }
  .article-meta { grid-template-columns: 1fr; gap: 14px; }
  .lede-block p { font-size: 20px; }
  .pro-note { grid-template-columns: 1fr; gap: 12px; padding: 22px 20px !important; }
  .pro-note::before { font-size: 64px; }
  .cta-section { padding: 36px 22px; border-radius: 18px; }
  footer.site-footer { padding: 28px 20px; flex-direction: column; align-items: flex-start; gap: 12px; }
}