/* blog.hexis.chat — same design tokens as hexis.chat (website/style.css),
   trimmed to what a reading surface needs. Keep the two in step: if a
   token changes on the main site, change it here too. See ../BRAND.md. */

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

:root {
  --bg:        #0a0c11;
  --bg-2:      #0c0f15;
  --panel:     #11141c;
  --panel-2:   #161a24;
  --panel-3:   #1d222e;
  --navy:      #172a42;

  --border:        #232838;
  --border-strong: #313a4f;
  --hairline:      #1a1e2a;

  --text:      #e9ecf3;
  --text-2:    #c3c9d6;
  --muted:     #828ca1;
  --faint:     #5a6377;

  --gold:      #d6a04e;
  --gold-hi:   #e7bd72;
  --gold-dim:  rgba(214, 160, 78, 0.16);
  --gold-soft: rgba(214, 160, 78, 0.06);
  --gold-line: rgba(214, 160, 78, 0.22);
  --cyan:      #54cabb;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);

  --radius:    4px;
  --radius-sm: 3px;

  --mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI',
          Roboto, Helvetica, Arial, sans-serif;
  --display: 'Space Grotesk', var(--sans);

  --measure: 720px;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body { background: var(--bg); min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }

a { color: var(--gold); text-decoration: none; transition: color 120ms ease; }
a:hover { color: var(--gold-hi); }
img, svg, video { max-width: 100%; display: block; }
::selection { background: var(--gold-dim); color: var(--gold-hi); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  padding: 8px 12px; background: var(--gold); color: #15110a; font-weight: 700;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ── Nav (mirrors the main site) ───────────────────────────────────── */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 12, 17, 0.78);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 62px;
}
.logo {
  font-family: var(--sans);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 2px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.logo:hover { color: var(--text); }
.logo-mark { width: 24px; height: 24px; display: inline-block; }
.logo .accent { color: var(--text); }
.logo-sub {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--muted);
  padding-left: 9px;
  border-left: 1px solid var(--border-strong);
}
.nav-links { display: flex; gap: 1.6rem; align-items: center; font-size: 0.9rem; }
.nav-links a { color: var(--muted); font-weight: 500; }
.nav-links a:hover { color: var(--text); }

.btn-sm {
  padding: 7px 16px;
  background: transparent;
  color: var(--text) !important;
  border: 1px solid var(--border-strong);
  font-weight: 700;
  letter-spacing: 0.2px;
  border-radius: var(--radius-sm);
  transition: border-color 120ms ease, color 120ms ease, transform 80ms ease;
}
.btn-sm:hover { border-color: var(--gold); color: var(--gold) !important; }
.btn-sm:active { transform: translateY(1px); }

.btn-primary, .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  justify-content: center;
  padding: 11px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  transition: filter 120ms ease, border-color 120ms ease, color 120ms ease, transform 80ms ease;
}
.btn-primary { background: var(--gold); color: #15110a; border: 1px solid var(--gold); box-shadow: var(--shadow-sm); }
.btn-primary:hover { filter: brightness(1.07); color: #15110a; }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border-strong); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn-ghost:active { transform: translateY(1px); }
.btn-primary .arr, .btn-ghost .arr { font-family: var(--mono); transition: transform 140ms ease; }
.btn-primary:hover .arr, .btn-ghost:hover .arr { transform: translateX(3px); }

/* ── Index ─────────────────────────────────────────────────────────── */

.blog-head {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 8.5rem 2rem 2.5rem;
}
.blog-head h1 {
  font-family: var(--display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.blog-head p { color: var(--text-2); font-size: 1.1rem; line-height: 1.6; max-width: 58ch; }

.blog-list { max-width: var(--measure); margin: 0 auto; padding: 0 2rem 5rem; }
.post-list { list-style: none; border-top: 1px solid var(--border); }
.post-list li {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 1.5rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--border);
}
.post-list time {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--faint);
  padding-top: 0.45rem;
  white-space: nowrap;
}
.post-list h2 {
  font-family: var(--display);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-bottom: 0.45rem;
}
.post-list h2 a { color: var(--text); }
.post-list h2 a:hover { color: var(--gold); }
.post-list p { color: var(--muted); font-size: 0.95rem; line-height: 1.6; }
.post-list-meta { font-family: var(--mono); font-size: 0.74rem; color: var(--faint); margin-top: 0.55rem; }
.empty { color: var(--muted); padding: 2rem 0; border-top: 1px solid var(--border); }

/* ── Post ──────────────────────────────────────────────────────────── */

.post { max-width: var(--measure); margin: 0 auto; padding: 8.5rem 2rem 5rem; }
.post-meta, .post-by {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--faint);
}
.post-meta { margin-bottom: 1.25rem; }
.post-meta a { color: var(--muted); }
.post-meta a:hover { color: var(--gold); }
.post-head h1 {
  font-family: var(--display);
  font-size: clamp(2rem, 4.6vw, 3rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.post-lede { color: var(--text-2); font-size: 1.15rem; line-height: 1.55; margin-bottom: 1rem; }
.post-by { margin-bottom: 2.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }

.prose { font-size: 1.04rem; line-height: 1.75; color: var(--text-2); }
.prose > * + * { margin-top: 1.15em; }
.prose h2, .prose h3, .prose h4 {
  font-family: var(--display);
  color: var(--text);
  letter-spacing: -0.015em;
  line-height: 1.2;
  position: relative;
}
.prose h2 { font-size: 1.6rem; margin-top: 2.4em; }
.prose h3 { font-size: 1.25rem; margin-top: 1.9em; }
.prose h4 { font-size: 1.05rem; margin-top: 1.6em; }
.prose h2 + *, .prose h3 + *, .prose h4 + * { margin-top: 0.6em; }
.prose .anchor {
  position: absolute;
  left: -1.4em;
  width: 1.4em;
  color: var(--faint);
  font-family: var(--mono);
  font-weight: 400;
  opacity: 0;
  transition: opacity 120ms ease;
}
.prose h2:hover .anchor, .prose h3:hover .anchor, .prose h4:hover .anchor, .prose .anchor:focus { opacity: 1; }
.prose strong { color: var(--text); font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li + li { margin-top: 0.4em; }
.prose li::marker { color: var(--gold); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2.5em 0; }

.prose blockquote {
  border-left: 2px solid var(--gold);
  padding: 0.25em 0 0.25em 1.2em;
  color: var(--muted);
}
.prose blockquote p + p { margin-top: 0.8em; }

.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.38em;
  color: var(--text);
}
.prose pre {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 2px solid var(--gold-line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.6;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; color: var(--text-2); }

.prose figure { margin: 1.75em 0; }
.prose figure img { border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); }
.prose figcaption { font-family: var(--mono); font-size: 0.76rem; color: var(--faint); margin-top: 0.6rem; }
.prose > img { border: 1px solid var(--border); border-radius: var(--radius); }

.prose table { width: 100%; border-collapse: collapse; font-size: 0.92rem; line-height: 1.5; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.prose th { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 1.2px; color: var(--faint); font-weight: 500; }
.prose td { color: var(--muted); }
.prose td strong { color: var(--text-2); }

.post-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2.5rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
}
.post-tags li { padding: 3px 8px; border: 1px solid var(--border); border-radius: 2px; }
.post-tags li::before { content: '#'; color: var(--faint); margin-right: 1px; }

.post-foot { margin-top: 3rem; padding-top: 1.75rem; border-top: 1px solid var(--border); }
.post-foot p { color: var(--muted); font-size: 0.92rem; line-height: 1.7; margin-bottom: 1.25rem; }
.post-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* ── Footer (mirrors the main site) ────────────────────────────────── */

/* Scoped to the page footer only — the post's own <footer class="post-foot">
   must not pick up the panel background + full-bleed padding. */
body > footer { border-top: 1px solid var(--border); padding: 2.75rem 0 2rem; background: var(--panel); }
.footer-inner { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
.footer-cols {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 1.5rem;
}
.footer-brand p { color: var(--muted); font-size: 0.88rem; line-height: 1.6; margin-top: 0.8rem; max-width: 34ch; }
.footer-col h4 {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 0.8rem;
}
.footer-col a { display: block; color: var(--muted); font-size: 0.88rem; padding: 0.22rem 0; }
.footer-col a:hover { color: var(--text); }
.footer-legal {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--faint);
}

/* ── Responsive ────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .footer-cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links a:not(.btn-sm) { display: none; }
  .nav-inner, .footer-inner { padding: 0 20px; }
  .logo-sub { display: none; }
  .blog-head, .blog-list, .post { padding-left: 20px; padding-right: 20px; }
  .blog-head, .post { padding-top: 7rem; }
  .post-list li { grid-template-columns: 1fr; gap: 0.35rem; padding: 1.3rem 0; }
  .post-list time { padding-top: 0; }
  .prose { font-size: 1rem; }
  .prose .anchor { display: none; }
  .post-cta .btn-primary, .post-cta .btn-ghost { flex: 1; }
}
@media (max-width: 480px) {
  .footer-cols { grid-template-columns: 1fr; gap: 1.5rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}