:root {
  --bg: #f3f7fb;
  --bg-raised: #ffffff;
  --bg-sunken: #e9f1f8;
  --ink: #232a33;
  --ink-soft: #626e7a;
  --ink-faint: #97a2ac;
  --line: #dde6ee;
  --accent: #2f6fb8;
  --accent-strong: #24578f;
  --accent-soft: #e4eefa;
  --accent-ink: #ffffff;
  --gold: #e0964e;
  --gold-soft: #fbeedc;
  --good: #4f9a68; --good-bg: #e7f3ea;
  --shadow: 0 1px 2px rgba(30,45,66,0.06), 0 6px 20px rgba(30,45,66,0.07);
  --shadow-sm: 0 1px 2px rgba(30,45,66,0.05), 0 2px 6px rgba(30,45,66,0.05);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --font-display: "Fraunces", ui-serif, Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161c24; --bg-raised: #202834; --bg-sunken: #1b222c;
    --ink: #e9edf3; --ink-soft: #aab4c0; --ink-faint: #7a8492;
    --line: #303a48;
    --accent: #7fb0e6; --accent-strong: #a5c9ef; --accent-soft: #223349;
    --accent-ink: #0d2136;
    --gold: #e8b678; --gold-soft: #3a2f18;
    --good: #92cca4; --good-bg: #24332a;
    --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 6px 22px rgba(0,0,0,0.35);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.25), 0 2px 6px rgba(0,0,0,0.25);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  margin: 0;
}
a { color: var(--accent-strong); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
img { max-width: 100%; display: block; }

.shell { max-width: 720px; margin: 0 auto; padding: 0 1.25rem; }

/* ---- Header ---- */
.seo-header {
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0;
  background: var(--bg-raised);
}
.seo-header .shell { max-width: 860px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand-mark { display: inline-flex; align-items: center; gap: 0.4rem; text-decoration: none; }
.brand-icon { width: 1.5rem; height: 1.5rem; flex-shrink: 0; }
.wordmark { font-family: var(--font-body); font-size: 1.05rem; letter-spacing: 0.005em; color: var(--ink); white-space: nowrap; }
.wordmark .wm-light { font-weight: 400; }
.wordmark .wm-bold { font-weight: 700; margin-left: 0.2em; }

.btn {
  font-family: var(--font-body); font-weight: 600; font-size: 0.88rem;
  border-radius: var(--radius-md); padding: 0.65rem 1.1rem; border: 1px solid var(--line);
  background: var(--bg-raised); color: var(--ink); cursor: pointer; text-decoration: none;
  display: inline-block; transition: background-color 0.15s ease, border-color 0.15s ease;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
@media (hover: hover) {
  .btn:hover { background: var(--bg-sunken); }
  .btn.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
}

/* ---- Article ---- */
.seo-main { max-width: 860px; margin: 0 auto; padding: 0 1.25rem; }
.seo-article { max-width: 640px; margin: 0 auto; padding: 2.6rem 0 3rem; }
.eyebrow {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent-strong); margin: 0 0 0.7rem;
}
.seo-article h1 {
  font-family: var(--font-display); font-weight: 600; font-size: 2rem; line-height: 1.2;
  margin: 0 0 1rem; color: var(--ink); text-wrap: balance;
}
.seo-article .lede { font-size: 1.08rem; color: var(--ink-soft); margin: 0 0 2rem; max-width: 54ch; }
.seo-article h2 {
  font-family: var(--font-display); font-weight: 600; font-size: 1.35rem; line-height: 1.3;
  color: var(--ink); margin: 2.4rem 0 0.9rem;
}
.seo-article h3 {
  font-family: var(--font-body); font-weight: 700; font-size: 1rem;
  color: var(--ink); margin: 1.6rem 0 0.5rem;
}
.seo-article p { margin: 0 0 1rem; max-width: 66ch; }
.seo-article ul, .seo-article ol { margin: 0 0 1.2rem; padding-left: 1.3rem; max-width: 62ch; }
.seo-article li { margin-bottom: 0.45rem; }
.seo-article strong { color: var(--ink); }

/* ---- Product bridge callout ---- */
.seo-callout {
  background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 1.5rem 1.6rem; margin: 2.2rem 0; box-shadow: var(--shadow-sm);
}
.seo-callout .brand-mark { margin-bottom: 0.7rem; }
.seo-callout p:last-of-type { margin-bottom: 1.1rem; }
.seo-callout ul { margin-bottom: 1.1rem; }

/* ---- Final CTA block ---- */
.seo-cta-block {
  text-align: center; background: var(--accent-soft); border-radius: var(--radius-lg);
  padding: 2.2rem 1.6rem; margin: 2.6rem 0 0.5rem;
}
.seo-cta-block h2 { margin-top: 0; }
.seo-cta-block p { margin: 0 auto 1.3rem; max-width: 46ch; color: var(--ink-soft); }

/* ---- FAQ ---- */
.seo-faq details {
  border-bottom: 1px solid var(--line); padding: 0.9rem 0;
}
.seo-faq summary {
  font-family: var(--font-body); font-weight: 600; color: var(--ink); cursor: pointer;
  list-style: none; display: flex; justify-content: space-between; gap: 0.8rem;
}
.seo-faq summary::-webkit-details-marker { display: none; }
.seo-faq summary::after { content: "+"; color: var(--accent-strong); font-weight: 700; flex-shrink: 0; }
.seo-faq details[open] summary::after { content: "\2212"; }
.seo-faq details p { margin: 0.7rem 0 0; color: var(--ink-soft); }

/* ---- Internal links between SEO pages ---- */
.seo-related { margin: 2.4rem 0; }
.seo-related h2 { margin-top: 0; }
.seo-related a { display: block; margin-bottom: 0.5rem; }

/* ---- Footer ---- */
.seo-footer {
  border-top: 1px solid var(--line); padding: 1.8rem 0 2.6rem; margin-top: 2rem;
}
.seo-footer .shell { max-width: 860px; text-align: center; }
.seo-footer p { font-size: 0.82rem; color: var(--ink-faint); margin: 0.3rem 0; }
.seo-footer a { color: var(--ink-soft); }

@media (max-width: 640px) {
  .seo-article h1 { font-size: 1.6rem; }
  .seo-article .lede { font-size: 1rem; }
}