*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f8f7f2;
  --fg: #0d0d0c;
  --dim: #6b6a64;
  --muted: #928f84;
  --surface: #f1efe7;
  --surface-strong: #ebe7da;
  --border: #151513;
  --line: rgba(21, 21, 19, 0.18);
  --green: #0a7b3e;
  --red: #c8102e;
}

html { scroll-behavior: smooth; }

body {
  min-height: 100dvh;
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image:
    radial-gradient(circle at 20% 20%, #000 0 1px, transparent 1px),
    radial-gradient(circle at 80% 70%, #000 0 1px, transparent 1px);
  background-size: 18px 18px, 23px 23px;
}

body::after {
  content: "NVDA +2.8%   SPY -0.2%   AAPL +0.9%   MSFT +0.6%   QQQ +1.1%";
  position: fixed;
  left: -8vw;
  right: -8vw;
  bottom: 0;
  z-index: 0;
  pointer-events: none;
  color: rgba(13, 13, 12, 0.055);
  font-size: clamp(2.1rem, 6vw, 6.4rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  white-space: nowrap;
}

a { color: inherit; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 200;
  padding: 0.75rem 1rem;
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
  font-size: 0.75rem;
}

.skip-link:focus { top: 1rem; }

.page-shell {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
}

.site-nav,
.seo-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 56px;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(248, 247, 242, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-logo,
.seo-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  text-decoration: none;
}

.sigma-mark {
  width: 28px;
  height: 28px;
  display: inline-flex;
  flex: 0 0 28px;
  align-items: center;
  justify-content: center;
  background: var(--fg);
  color: var(--bg);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1;
}

.nav-logo img,
.seo-brand img {
  width: 28px;
  height: 28px;
}

.nav-logo > span:not(.sigma-mark),
.seo-brand > span:not(.sigma-mark) {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-links,
.seo-nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 2rem);
}

.nav-links a,
.seo-nav-links a,
.nav-cta,
.seo-nav-cta {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
}

.nav-links a,
.seo-nav-links a {
  color: var(--dim);
  transition: color 180ms ease;
}

.nav-links a:hover,
.seo-nav-links a:hover,
.nav-links a[aria-current="page"],
.seo-nav-links a[aria-current="page"] {
  color: var(--fg);
}

.nav-cta,
.seo-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  border: 1px solid var(--fg);
  background: var(--fg);
  color: var(--bg);
  font-weight: 700;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.nav-cta:hover,
.seo-nav-cta:hover {
  background: transparent;
  color: var(--fg);
}

.nav-cta:active,
.btn:active,
.resource-card:active,
.tool-chip:active {
  transform: scale(0.98);
}

.container,
.seo-container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.seo-hero {
  padding: clamp(4.5rem, 8vw, 8rem) 0 clamp(2.8rem, 6vw, 5.2rem);
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(280px, 0.58fr);
  gap: clamp(2rem, 6vw, 5.5rem);
  align-items: end;
}

.seo-hero > .seo-hero-grid,
.seo-hero > .seo-container.seo-hero-grid {
  grid-column: 1 / -1;
  width: 100%;
}

.eyebrow,
.seo-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.35rem;
  padding: 0.42rem 0.75rem;
  border: 1px solid var(--border);
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--green);
}

h1,
.display-title {
  max-width: 10.5ch;
  font-size: clamp(3rem, 6vw, 5.35rem);
  line-height: 0.92;
  letter-spacing: -0.065em;
  font-weight: 800;
  text-wrap: balance;
}

.calculator-hero h1 {
  max-width: 12ch;
}

.seo-hero h1 span,
.accent { color: var(--green); }

.hero-copy,
.seo-hero-copy,
.seo-lede {
  max-width: 62ch;
  color: var(--dim);
  font-size: clamp(0.95rem, 1.35vw, 1.08rem);
  line-height: 1.75;
  margin-top: 1.35rem;
}

.hero-panel,
.seo-terminal-panel {
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg, rgba(13, 13, 12, 0.06), transparent 42%),
    var(--surface);
  box-shadow: 18px 18px 0 rgba(13, 13, 12, 0.06);
}

.panel-top,
.seo-panel-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.panel-body { padding: 1rem; }

.seo-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(280px, 0.58fr);
  gap: clamp(2rem, 6vw, 5.5rem);
  align-items: end;
}

.seo-live-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--green);
  display: inline-block;
}

.seo-terminal-lines {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
  margin: 1rem;
}

.seo-terminal-lines p {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  gap: 0.85rem;
  background: var(--bg);
  padding: 0.78rem 0.85rem;
  color: var(--dim);
  font-size: 0.82rem;
  line-height: 1.45;
}

.seo-terminal-lines span {
  color: var(--fg);
  font-weight: 800;
}

.market-strip {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}

.market-row {
  display: grid;
  grid-template-columns: 0.8fr 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.78rem 0.85rem;
  background: var(--bg);
  font-size: 0.78rem;
}

.market-row strong { font-size: 1rem; }
.market-row span { color: var(--dim); }
.up { color: var(--green); font-weight: 800; }
.down { color: var(--red); font-weight: 800; }

.section,
.seo-section {
  padding: clamp(2.5rem, 6vw, 5.5rem) 0;
  border-top: 1px solid var(--line);
}

.section-head,
.seo-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(280px, 0.42fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 2rem;
}

.section-kicker {
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

h2 {
  max-width: 14ch;
  font-size: clamp(2rem, 4.5vw, 4rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
  font-weight: 800;
  text-wrap: balance;
}

.section-head p,
.muted {
  color: var(--dim);
  line-height: 1.7;
}

.resource-grid,
.seo-tool-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.85fr 0.85fr;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}

.seo-tool-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.resource-card,
.seo-tool-card {
  min-height: 220px;
  padding: clamp(1rem, 2.4vw, 1.55rem);
  background: var(--bg);
  color: var(--fg);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.35rem;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.resource-card:nth-child(4n + 1),
.seo-tool-card:nth-child(2n + 1) {
  background: var(--surface);
}

.resource-card:hover,
.seo-tool-card:hover {
  background: var(--fg);
  color: var(--bg);
}

.card-meta,
.seo-card-meta,
.term-meta {
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.resource-card:hover .card-meta,
.seo-tool-card:hover .seo-card-meta,
.resource-card:hover p,
.seo-tool-card:hover p {
  color: rgba(248, 247, 242, 0.72);
}

.resource-card h3,
.seo-tool-card h3 {
  font-size: clamp(1.35rem, 2.5vw, 2.1rem);
  letter-spacing: -0.05em;
  line-height: 0.98;
  margin-bottom: 0.8rem;
}

.resource-card p,
.seo-tool-card p {
  color: var(--dim);
  font-size: 0.88rem;
  line-height: 1.65;
}

.arrow {
  font-size: 1.5rem;
  line-height: 1;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.68fr) minmax(260px, 0.32fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: start;
}

.article-body {
  max-width: 760px;
  color: var(--fg);
}

.article-body h2,
.article-body h3 {
  max-width: none;
  margin-top: 2.2rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.04em;
  line-height: 1;
}

.article-body h2 { font-size: clamp(1.7rem, 3vw, 2.65rem); }
.article-body h3 { font-size: clamp(1.25rem, 2vw, 1.75rem); }

.article-body p,
.article-body li {
  color: var(--dim);
  font-size: 0.98rem;
  line-height: 1.78;
}

.article-body p + p { margin-top: 1rem; }
.article-body ul,
.article-body ol {
  margin: 1rem 0 1.2rem 1.2rem;
}

.article-body li + li { margin-top: 0.5rem; }

.formula {
  margin: 1.35rem 0;
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--surface);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.aside-panel {
  position: sticky;
  top: 84px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1rem;
}

.aside-panel h3 {
  font-size: 1rem;
  letter-spacing: -0.03em;
  margin-bottom: 0.8rem;
}

.aside-panel a {
  display: block;
  color: var(--dim);
  text-decoration: none;
  font-size: 0.8rem;
  line-height: 1.55;
  padding: 0.65rem 0;
  border-top: 1px solid var(--line);
}

.aside-panel a:hover { color: var(--fg); }

.tool-shell {
  display: grid;
  grid-template-columns: minmax(0, 0.48fr) minmax(320px, 0.52fr);
  gap: clamp(1rem, 4vw, 3rem);
  align-items: start;
}

.tool-panel,
.calculator-card,
.calculator-results {
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 14px 14px 0 rgba(13, 13, 12, 0.055);
}

.tool-panel header {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.tool-form,
.calculator-fields {
  padding: 1rem;
  display: grid;
  gap: 0.9rem;
}

.field,
.calculator-fields label {
  display: grid;
  gap: 0.45rem;
}

.field label,
.calculator-fields span {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}

.field input,
.calculator-fields input {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  font-size: 1rem;
  padding: 0.85rem;
  outline: none;
}

.field input:focus,
.calculator-fields input:focus {
  box-shadow: 0 0 0 2px rgba(10, 123, 62, 0.18);
}

.btn,
.seo-btn-primary,
.seo-btn-ghost,
.seo-card-link {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 0.8rem 1.2rem;
  border: 1px solid var(--fg);
  background: var(--fg);
  color: var(--bg);
  font: inherit;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.btn:hover,
.seo-btn-primary:hover,
.seo-card-link:hover {
  background: transparent;
  color: var(--fg);
}

.btn.secondary,
.seo-btn-ghost {
  background: transparent;
  color: var(--fg);
}

.btn.secondary:hover,
.seo-btn-ghost:hover {
  background: var(--fg);
  color: var(--bg);
}

.result-grid,
.seo-metric-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border-top: 1px solid var(--border);
  background: var(--border);
}

.result-tile,
.result-item,
.seo-metric-row div {
  background: var(--bg);
  padding: 1rem;
}

.result-label,
.result-item dt,
.seo-metric-row dt {
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
}

.result-value,
.result-item dd,
.seo-metric-row dd {
  font-size: clamp(1.35rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.06em;
}

.tool-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.2rem;
}

.tool-chip {
  display: inline-flex;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  color: var(--dim);
  text-decoration: none;
  font-size: 0.76rem;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.tool-chip:hover {
  background: var(--fg);
  color: var(--bg);
}

.digest-list {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}

.digest-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  background: var(--bg);
}

.digest-date {
  color: var(--dim);
  font-size: 0.78rem;
}

.digest-item h3 {
  font-size: 1.15rem;
  letter-spacing: -0.04em;
  margin-bottom: 0.3rem;
}

.digest-item p {
  color: var(--dim);
  line-height: 1.55;
  font-size: 0.9rem;
}

.legal-note,
.seo-disclaimer-band p:not(.seo-kicker),
.calculator-note,
.calculator-error {
  margin-top: 2rem;
  padding: 1rem;
  border: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.78rem;
  line-height: 1.65;
}

.site-footer,
.seo-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2rem;
  color: var(--dim);
  font-size: 0.76rem;
  line-height: 1.7;
}

.footer-inner,
.seo-footer-grid {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: start;
}

.footer-links,
.seo-footer-links,
.seo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
}

.footer-links a,
.seo-footer-links a {
  color: var(--dim);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-links a:hover,
.seo-footer-links a:hover { color: var(--fg); }

.seo-actions {
  margin-top: 1.4rem;
}

.calculator-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.48fr) minmax(320px, 0.52fr);
  gap: clamp(1rem, 4vw, 3rem);
  align-items: start;
}

.calculator-card .seo-section-heading,
.calculator-results .seo-section-heading {
  display: block;
  margin: 0;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.calculator-error {
  min-height: 1.35rem;
  padding: 0 1rem 1rem;
  color: var(--red);
}

.seo-disclaimer-band {
  background: rgba(13, 13, 12, 0.025);
}

.learn-page .seo-hero,
.glossary-page .seo-hero {
  width: min(1120px, calc(100% - 2rem));
  margin-left: auto;
  margin-right: auto;
  display: block;
}

.seo-page .seo-hero {
  width: min(1120px, calc(100% - 2rem));
  margin-left: auto;
  margin-right: auto;
}

.learn-page .seo-hero h1,
.glossary-page .seo-hero h1 {
  max-width: 11.5ch;
}

.hero-badge,
.section-tag,
.card-kicker,
.post-meta,
.pulse-label,
.topic-board span {
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.35rem;
  padding: 0.42rem 0.75rem;
  border: 1px solid var(--border);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--green);
}

.hero-sub,
.section-sub {
  max-width: 62ch;
  color: var(--dim);
  font-size: clamp(0.95rem, 1.35vw, 1.08rem);
  line-height: 1.75;
  margin-top: 1.35rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.4rem;
}

.btn-primary,
.btn-ghost,
.seo-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 0.8rem 1.2rem;
  border: 1px solid var(--fg);
  background: var(--fg);
  color: var(--bg);
  font: inherit;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.btn-primary:hover,
.seo-button-primary:hover {
  background: transparent;
  color: var(--fg);
}

.btn-ghost,
.seo-button-ghost {
  background: transparent;
  color: var(--fg);
}

.btn-ghost:hover,
.seo-button-ghost:hover {
  background: var(--fg);
  color: var(--bg);
}

.resource-section,
.link-band {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5.5rem) 0;
  border-top: 1px solid var(--line);
}

.section-header,
.section-ruler {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(280px, 0.42fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 2rem;
}

.section-header h2,
.section-ruler h2 {
  max-width: 15ch;
}

.card-kicker {
  margin-bottom: 0.75rem;
}

.dark-card,
.is-dark {
  background: var(--fg) !important;
  color: var(--bg) !important;
}

.dark-card p,
.dark-card a,
.is-dark p,
.is-dark li,
.is-dark span {
  color: rgba(248, 247, 242, 0.74) !important;
}

.dark-card h3,
.is-dark h3 {
  color: var(--bg);
}

.resource-grid-asymmetric {
  grid-template-columns: 1.1fr 0.9fr 1fr;
}

.compact-grid,
.glossary-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.terminal-note,
.terminal-panel {
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg, rgba(13, 13, 12, 0.06), transparent 42%),
    var(--surface);
  box-shadow: 14px 14px 0 rgba(13, 13, 12, 0.055);
}

.terminal-note {
  margin: 1.5rem 0;
  padding: 1rem;
}

.terminal-note span,
.terminal-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.terminal-note p { margin-top: 0.7rem; }

.terminal-topline,
.ticker-strip {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.ticker-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.ticker-strip span {
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--line);
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 800;
}

.terminal-feed,
.terminal-list {
  padding: 1rem;
  display: grid;
  gap: 0.8rem;
}

.terminal-feed p,
.terminal-list li {
  color: var(--dim);
  line-height: 1.6;
  font-size: 0.88rem;
}

.terminal-list { margin-left: 1.2rem; }

.digest-grid,
.post-grid,
.topic-board,
.pulse-board {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}

.digest-grid,
.post-grid {
  grid-template-columns: 1.15fr 0.85fr;
}

.digest-card,
.post-card,
.topic-board article,
.pulse-row {
  background: var(--bg);
  padding: clamp(1rem, 2.4vw, 1.55rem);
}

.digest-card:first-child,
.post-card-large {
  grid-row: span 2;
}

.digest-card h3,
.post-card h3,
.topic-board h3,
.pulse-row h3 {
  font-size: clamp(1.25rem, 2.4vw, 2rem);
  line-height: 1;
  letter-spacing: -0.045em;
  margin-bottom: 0.8rem;
}

.digest-card p,
.post-card p,
.topic-board p,
.pulse-row p {
  color: var(--dim);
  line-height: 1.68;
}

.post-link {
  color: inherit;
  text-decoration: none;
  display: block;
  min-height: 100%;
}

.read-more {
  display: inline-flex;
  margin-top: 1rem;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.signal-list {
  margin: 1rem 0 0 1.1rem;
  color: var(--dim);
}

.signal-list li + li { margin-top: 0.55rem; }

.signal-list span,
.pulse-status {
  color: var(--green);
  font-weight: 800;
}

.pulse-board { grid-template-columns: 1fr; }

.pulse-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.46fr) 120px minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
}

.term-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.2rem;
}

.term-nav a {
  display: inline-flex;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  color: var(--dim);
  text-decoration: none;
  font-size: 0.76rem;
}

.term-nav a:hover {
  background: var(--fg);
  color: var(--bg);
}

.article-body,
.article-shell {
  width: min(860px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.article-header {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.article-header h1,
.glossary-term h1 {
  max-width: 12ch;
}

.article-dek,
.term-definition {
  margin-top: 1.2rem;
  color: var(--dim);
  font-size: clamp(1rem, 1.45vw, 1.15rem);
  line-height: 1.75;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  margin-top: 1.3rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.article-callout {
  margin: 1.5rem 0;
}

.article-callout p {
  padding: 1rem;
  color: var(--dim);
  line-height: 1.65;
}

.article-content h2 {
  max-width: none;
  margin-top: 2.2rem;
  margin-bottom: 0.85rem;
  font-size: clamp(1.65rem, 3vw, 2.5rem);
}

.article-content p,
.article-footer p {
  color: var(--dim);
  line-height: 1.8;
}

.article-content p + p {
  margin-top: 1rem;
}

.article-grid-note,
.watchlist-grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
  margin: 1.5rem 0;
}

.article-grid-note {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.article-grid-note div,
.watch-item {
  background: var(--bg);
  padding: 1rem;
}

.article-grid-note span,
.watch-code {
  display: inline-flex;
  color: var(--green);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.65rem;
}

.article-footer {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.article-footer .seo-button {
  margin-top: 1rem;
}

.metric-formula {
  margin: 1.35rem 0;
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--surface);
}

.metric-formula span {
  display: block;
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.metric-formula strong {
  display: block;
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  letter-spacing: -0.05em;
}

.watchlist-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.watch-item h3 {
  font-size: clamp(1.2rem, 2vw, 1.65rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 0.75rem;
}

.watch-item p,
.disclaimer-panel p {
  color: var(--dim);
  line-height: 1.7;
}

.disclaimer-panel {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.5fr) minmax(280px, 0.5fr);
  gap: 2rem;
  align-items: start;
}

@media (max-width: 820px) {
  .site-nav,
  .seo-nav {
    padding: 0.8rem 1rem;
    align-items: flex-start;
    min-height: auto;
  }

  .nav-links,
  .seo-nav-links {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 0.7rem 1rem;
  }

  .nav-links a:nth-child(n+4),
  .seo-nav-links a:nth-child(n+4) { display: none; }

  .seo-hero,
  .seo-hero-grid,
  .section-head,
  .section-header,
  .section-ruler,
  .seo-section-heading,
  .split-layout,
  .tool-shell,
  .calculator-grid,
  .footer-inner,
  .digest-grid,
  .post-grid,
  .topic-board,
  .pulse-row {
    grid-template-columns: 1fr;
  }

  .seo-hero {
    padding-top: 3rem;
  }

  h1,
  .display-title {
    max-width: 11ch;
  }

  .resource-grid,
  .resource-grid-asymmetric,
  .compact-grid,
  .glossary-grid,
  .seo-tool-grid,
  .article-grid-note,
  .watchlist-grid,
  .disclaimer-panel {
    grid-template-columns: 1fr;
  }

  .resource-card {
    min-height: 180px;
  }

  .aside-panel {
    position: static;
  }

  .digest-item {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}