/* Shared design system for long-form guide pages.
   Tokens match the app (bobblehead-app/src/components/theme.js) and the
   landing page, so guides read as the same site. */
:root {
  --bg: #0B0D11;
  --bg-card: #14181E;
  --bg-subtle: #1A1F26;
  --bg-tab: #0E1116;
  --accent: #6CACE4;
  --accent-light: #93C4EE;
  --accent-deep: #4A8CC9;
  --accent-muted: rgba(108, 172, 228, 0.14);
  --ink: #F5F7FA;
  --ink-2: #9BA3AF;
  --ink-mute: #5E6673;
  --ink-inverse: #081019;
  --border: #20262F;
  --border-strong: #2E3540;
  --warning: #FBBF24;
  --grad-accent: linear-gradient(135deg, #8FC2EE 0%, #5D9FD9 100%);
  --grad-hero: linear-gradient(160deg, #1A2129 0%, #10151B 100%);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  background: var(--bg); color: var(--ink); font-family: var(--font);
  line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: var(--accent); }
a:hover { color: var(--accent-light); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent-light); outline-offset: 3px; border-radius: 6px;
}

/* ── Nav (matches the landing page) ── */
nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(11, 13, 17, 0.86);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 12px 22px; max-width: 900px; margin: 0 auto;
}
.brand {
  display: flex; align-items: center; gap: 10px; color: var(--ink);
  text-decoration: none; font-size: 14px; font-weight: 800;
  letter-spacing: 0.13em; text-transform: uppercase; line-height: 1.15;
}
.brand svg { flex: none; }
.nav-cta {
  background: var(--grad-accent); color: var(--ink-inverse); text-decoration: none;
  font-size: 13px; font-weight: 800; padding: 10px 18px; border-radius: 999px;
  white-space: nowrap; transition: filter .15s ease, transform .15s ease;
}
.nav-cta:hover { filter: brightness(1.08); transform: translateY(-1px); color: var(--ink-inverse); }
@media (max-width: 420px) { .brand { font-size: 12px; } }

/* ── Article ── */
.wrap { max-width: 720px; margin: 0 auto; padding: 0 22px; }
article { padding: 44px 0 20px; }
.crumb {
  font-size: 13px; color: var(--ink-2); text-decoration: none;
  display: inline-block; margin-bottom: 22px;
}
.crumb:hover { color: var(--accent); }
article h1 {
  font-size: clamp(30px, 5vw, 44px); font-weight: 800;
  letter-spacing: -0.032em; line-height: 1.12; margin-bottom: 18px;
}
.byline {
  font-size: 13px; color: var(--ink-mute); letter-spacing: .04em;
  padding-bottom: 26px; margin-bottom: 30px; border-bottom: 1px solid var(--border);
}
.lede {
  font-size: 19px; color: var(--ink); background: var(--grad-hero);
  border: 1px solid var(--border-strong); border-left: 3px solid var(--accent);
  border-radius: 14px; padding: 22px 24px; margin-bottom: 38px;
}
article h2 {
  font-size: clamp(22px, 3.2vw, 28px); font-weight: 800;
  letter-spacing: -0.022em; margin: 44px 0 14px; scroll-margin-top: 76px;
}
article h3 {
  font-size: 18.5px; font-weight: 700; letter-spacing: -0.01em;
  margin: 30px 0 10px; color: var(--ink);
}
article p { margin-bottom: 17px; color: var(--ink-2); }
article p strong, article li strong { color: var(--ink); font-weight: 700; }
article ul, article ol { margin: 0 0 18px 22px; color: var(--ink-2); }
article li { margin-bottom: 9px; }

/* Table of contents */
.toc {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 20px 24px; margin-bottom: 38px;
}
.toc h2 {
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 12px;
}
.toc ol { margin: 0 0 0 18px; }
.toc li { margin-bottom: 6px; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

/* Era table */
.table-scroll { overflow-x: auto; margin-bottom: 22px; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 14.5px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th {
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); font-weight: 700; border-bottom-color: var(--border-strong);
}
td { color: var(--ink-2); }
tbody tr:last-child td { border-bottom: none; }

/* Callout */
.note {
  background: var(--bg-card); border: 1px solid var(--border);
  border-left: 3px solid var(--warning); border-radius: 12px;
  padding: 18px 20px; margin: 26px 0; font-size: 15px; color: var(--ink-2);
}
.note strong { color: var(--ink); }

/* CTA block */
.cta {
  background: var(--grad-hero); border: 1px solid var(--border-strong);
  border-radius: 20px; padding: 30px 26px; text-align: center; margin: 44px 0 12px;
}
.cta h2 { margin: 0 0 10px; font-size: 24px; }
.cta p { color: var(--ink-2); margin-bottom: 22px; }
.btn {
  display: inline-block; background: var(--grad-accent); color: var(--ink-inverse);
  text-decoration: none; font-weight: 800; font-size: 16px;
  padding: 14px 28px; border-radius: 999px;
  box-shadow: 0 6px 24px rgba(108, 172, 228, .26);
  transition: filter .15s ease, transform .15s ease;
}
.btn:hover { filter: brightness(1.07); transform: translateY(-2px); color: var(--ink-inverse); }
.cta small { display: block; margin-top: 14px; color: var(--ink-mute); font-size: 12.5px; }

/* FAQ */
.faq details {
  border: 1px solid var(--border); background: var(--bg-card);
  border-radius: 14px; margin-bottom: 11px;
}
.faq details[open] { border-color: var(--border-strong); }
.faq summary {
  cursor: pointer; padding: 16px 48px 16px 19px; font-weight: 700;
  font-size: 15.5px; list-style: none; position: relative; color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 20px; top: 22px; width: 8px; height: 8px;
  border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: rotate(45deg); transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(-135deg); top: 25px; }
.faq .a { padding: 0 19px 17px; color: var(--ink-2); font-size: 14.5px; }
.faq .a p { margin-bottom: 10px; }
.faq .a p:last-child { margin-bottom: 0; }

/* Footer */
footer {
  border-top: 1px solid var(--border); background: var(--bg-tab);
  padding: 40px 0 50px; text-align: center; margin-top: 50px;
}
.foot-links { display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.foot-links a { color: var(--ink-2); font-size: 13.5px; text-decoration: none; }
.foot-links a:hover { color: var(--accent); text-decoration: underline; }
.copyright { font-size: 12px; color: var(--ink-mute); letter-spacing: .06em; }