/* Static /resources/ pages — mirrors the main site's LIGHT (default) theme + blog typography.
   Theme values copied from client/src/index.css (dark) and BlogPostPage.tsx. */
:root {
  --background: hsl(0 0% 99%);
  --card: hsl(0 0% 100%);
  --card-50: hsl(0 0% 100% / 0.5);
  --fg: hsl(222 47% 11%);
  --fg-80: hsl(222 47% 11% / 0.85);
  --fg-muted: hsl(220 9% 40%);
  --primary: hsl(21 100% 50%);
  --primary-hover: hsl(21 100% 45%);
  --border: hsl(220 13% 88%);
  --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--background);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.wrap-wide { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
img { max-width: 100%; }

/* header — fixed translucent bar like the React Navbar */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: hsl(0 0% 99% / 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-row { display: flex; align-items: center; justify-content: space-between; padding: 14px 8px; gap: 16px; }
.logo { display: inline-flex; align-items: center; text-decoration: none; }
.logo img { height: 28px; width: auto; }
.site-header nav { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.site-header nav a { color: var(--fg-muted); text-decoration: none; font-size: 0.9rem; font-weight: 500; }
.site-header nav a:hover { color: var(--fg); }
.btn {
  display: inline-block; background: var(--primary); color: #fff !important;
  padding: 10px 22px; border-radius: 999px; font-weight: 600; font-size: 0.9rem;
  text-decoration: none; transition: background 0.15s ease;
}
.btn:hover { background: var(--primary-hover); }

/* article — blog typography (BlogPostPage.tsx) */
.article-wrap { max-width: 820px; padding-top: 108px; padding-bottom: 64px; }
.breadcrumbs { font-size: 0.85rem; color: var(--fg-muted); margin-bottom: 24px; }
.breadcrumbs a { color: var(--fg-muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--fg); text-decoration: underline; }
.breadcrumbs .sep { margin: 0 6px; opacity: 0.6; }
.breadcrumbs span[aria-current] { color: var(--fg-80); }
article h1 {
  font-size: 2.5rem; line-height: 1.15; font-weight: 700;
  letter-spacing: -0.02em; margin: 0 0 14px;
}
.byline { color: var(--fg-muted); font-size: 0.9rem; margin: 0 0 36px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
article h2 {
  font-size: 1.75rem; line-height: 1.25; font-weight: 700; margin: 48px 0 16px;
  letter-spacing: -0.01em;
}
article h2::before {
  content: ""; display: block; width: 44px; height: 3px;
  background: var(--primary); border-radius: 2px; margin-bottom: 12px;
}
article h3 { font-size: 1.3rem; line-height: 1.35; font-weight: 600; margin: 32px 0 10px; }
article p, article li { color: var(--fg-80); font-size: 1.075rem; line-height: 1.85; }
article p { margin: 0 0 24px; }
article a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
article a:hover { color: var(--primary-hover); }
article ul, article ol { padding-left: 24px; margin: 0 0 24px; }
article li { margin: 8px 0; }
article strong { color: var(--fg); font-weight: 600; }
article blockquote {
  background: hsl(21 100% 50% / 0.06); border-left: 3px solid var(--primary);
  margin: 24px 0; padding: 14px 20px; border-radius: 0 8px 8px 0; color: var(--fg-80);
}
article blockquote p { margin: 0; }
article hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

.btn-outline {
  display: inline-block; padding: 8px 18px; border-radius: 999px; font-weight: 500;
  border: 1px solid var(--border); color: var(--fg) !important; background: var(--card);
}
.btn-outline:hover { border-color: var(--fg-muted); }

/* in-article table of contents */
.toc {
  margin: 28px 0 12px;
  padding: 22px 24px 18px;
  background: linear-gradient(180deg, hsl(21 100% 50% / 0.045), hsl(0 0% 100%) 55%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.toc-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.78rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.09em; color: var(--fg); margin: 0 0 14px;
}
.toc-title::before {
  content: ""; display: inline-block; width: 18px; height: 3px;
  background: var(--primary); border-radius: 2px;
}
.toc-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr; column-gap: 20px; row-gap: 2px;
}
.toc-list li { margin: 0; }
.toc-list a {
  display: flex; align-items: baseline; gap: 10px;
  padding: 7px 10px; margin: 0 -10px;
  font-size: 0.92rem; line-height: 1.4; font-weight: 500;
  color: var(--fg-80); text-decoration: none; border-radius: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}
.toc-num {
  flex: none; font-size: 0.72rem; font-weight: 600;
  font-variant-numeric: tabular-nums; color: var(--primary);
  opacity: 0.75; transition: opacity 0.15s ease;
}
.toc-label { min-width: 0; }
.toc-list a:hover { background: hsl(21 100% 50% / 0.07); color: var(--fg); }
.toc-list a:hover .toc-num { opacity: 1; }
.toc-list a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
@media (max-width: 640px) {
  .toc { padding: 18px 18px 14px; }
  .toc-list { grid-template-columns: 1fr; }
}
article h2[id] { scroll-margin-top: 96px; }

/* resources hub (/resources/) */
.hub-wrap { padding-top: 108px; padding-bottom: 64px; }
.hub-wrap h1 { font-size: 2.5rem; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 10px; }
.hub-intro { color: var(--fg-muted); font-size: 1.075rem; max-width: 640px; margin: 0 0 28px; }
.hub-controls { margin-bottom: 28px; }
#hub-search {
  width: 100%; max-width: 420px; padding: 11px 16px; font-size: 0.95rem;
  border: 1px solid var(--border); border-radius: 999px; background: var(--card);
  color: var(--fg); outline: none; margin-bottom: 16px;
}
#hub-search:focus { border-color: var(--primary); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 7px 14px; font-size: 0.85rem; font-weight: 500; cursor: pointer;
  border: 1px solid var(--border); border-radius: 999px; background: var(--card);
  color: var(--fg-muted); transition: all 0.15s ease; font-family: inherit;
}
.chip:hover { color: var(--fg); border-color: var(--fg-muted); }
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  display: block; padding: 20px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); text-decoration: none; color: var(--fg);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover { border-color: var(--primary); box-shadow: 0 4px 12px -2px rgba(0,0,0,0.08); }
.card[hidden] { display: none; }
.card-lane {
  display: inline-block; font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--primary); margin-bottom: 8px;
}
.card h2 { font-size: 1.05rem; font-weight: 600; line-height: 1.35; margin: 0 0 8px; }
.card p {
  font-size: 0.875rem; color: var(--fg-muted); line-height: 1.55; margin: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.hub-empty { color: var(--fg-muted); padding: 32px 0; }
@media (max-width: 900px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .card-grid { grid-template-columns: 1fr; } .hub-wrap { padding-top: 28px; } .hub-wrap h1 { font-size: 1.9rem; } }

/* tables */
article table {
  width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.95rem;
  display: block; overflow-x: auto; border-radius: var(--radius);
}
article th, article td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; vertical-align: top; }
article th { background: var(--card); color: var(--fg); font-weight: 600; }
article td { color: var(--fg-80); }
article tbody tr:nth-child(even) td { background: hsl(220 14% 97%); }

/* CTA band — mirrors the blog SidebarCTA card */
.cta-band {
  margin-top: 56px; padding: 32px; background: var(--card);
  border: 1px solid var(--border); border-radius: 16px; text-align: center;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.06);
}
.cta-band h2 { margin: 0 0 10px; font-size: 1.4rem; font-weight: 700; }
.cta-band p { color: var(--fg-muted); margin: 0 0 20px; font-size: 1rem; }

/* footer — mirrors Footer.tsx (bg-card/50, border-t, link columns) */
.site-footer { border-top: 1px solid var(--border); background: hsl(0 0% 98%); margin-top: 48px; padding: 64px 0 32px; }
.foot-cols { display: grid; grid-template-columns: repeat(6, 1fr); gap: 32px; margin-bottom: 40px; }
.foot-brand { grid-column: span 1; }
.foot-cols h4 { margin: 0 0 14px; font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--fg); }
.foot-cols a { display: block; color: var(--fg-muted); text-decoration: none; margin: 8px 0; font-size: 0.9rem; }
.foot-cols a:hover { color: var(--fg); }
.foot-cols p { color: var(--fg-muted); font-size: 0.875rem; line-height: 1.6; margin-top: 14px; }
.fine { color: hsl(220 9% 55%); font-size: 0.82rem; border-top: 1px solid var(--border); padding-top: 22px; margin: 0; }
.fine a { color: hsl(220 9% 55%); }
.fine a:hover { color: var(--fg-muted); }

@media (max-width: 1024px) {
  .foot-cols { grid-template-columns: repeat(3, 1fr); }
  .foot-brand { grid-column: span 3; }
}
@media (max-width: 640px) {
  article h1 { font-size: 1.9rem; }
  article h2 { font-size: 1.45rem; }
  article p, article li { font-size: 1rem; line-height: 1.75; }
  .site-header { position: static; }
  .article-wrap { padding-top: 28px; }
  .nav-row { flex-direction: column; align-items: flex-start; }
  .foot-cols { grid-template-columns: repeat(2, 1fr); }
  .foot-brand { grid-column: span 2; }
}