/* ═══════════════════════════════════════════════════════════════════════════
   BrainFrame — theme
   Dark navy canvas, glowing cyan/teal accents. Mirrors the brand imagery
   (circuit-board brain + book radiating a knowledge network).
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  /* Palette */
  --bg:            #060b14;   /* near-black navy */
  --bg-alt:        #0a1220;   /* raised panel */
  --bg-card:       #0e1826;
  --border:        #17293d;
  --text:          #dbe6f0;
  --text-muted:    #8ba0b6;
  --accent:        #22d3ee;   /* cyan */
  --accent-2:      #2dd4bf;   /* teal */
  --accent-soft:   rgba(34, 211, 238, 0.12);
  --glow:          rgba(34, 211, 238, 0.35);

  --max-width: 1080px;
  --radius: 14px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Subtle ambient glow anchored top-center, evoking the brain artwork. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 45% at 50% -5%, rgba(34, 211, 238, 0.10), transparent 70%),
    radial-gradient(40% 35% at 85% 15%, rgba(45, 212, 191, 0.06), transparent 70%);
  pointer-events: none;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; font-weight: 700; }

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ── Buttons ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  cursor: pointer;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121a;
  box-shadow: 0 0 0 0 var(--glow);
}
.btn-primary:hover { box-shadow: 0 8px 30px -6px var(--glow); }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: #fff; }

/* ── Header / nav ──────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(6, 11, 20, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 1.15rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.brand .accent { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 22px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--text-muted); font-size: 0.95rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* GitHub button — prominent, always visible (even on mobile). */
.btn-github {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 600;
  transition: border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease, transform 0.15s ease;
}
.btn-github svg { flex: none; }
.btn-github:hover {
  text-decoration: none;
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 26px -12px var(--glow);
  transform: translateY(-1px);
}

/* ── Hero ──────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.28;
  z-index: 0;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6,11,20,0.55) 0%, rgba(6,11,20,0.85) 60%, var(--bg) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  padding: 120px 24px 110px;
  text-align: center;
}
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  margin: 0 0 20px;
  background: linear-gradient(180deg, #ffffff 30%, #a9c7d6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .subhead {
  font-size: clamp(1.05rem, 2.4vw, 1.28rem);
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 36px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ── Section scaffolding ───────────────────────────────────────────────── */
section { padding: 84px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); margin: 0 0 14px; }
.section-head p { color: var(--text-muted); font-size: 1.08rem; margin: 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ── Feature grid ──────────────────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 14px 40px -20px var(--glow);
}
.feature-card .icon {
  font-size: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  border-radius: 12px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 1.2rem; margin: 0 0 10px; }
.feature-card p { color: var(--text-muted); margin: 0; font-size: 0.98rem; }

/* ── Philosophy ────────────────────────────────────────────────────────── */
.philosophy-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  counter-reset: phil;
}
.philosophy-item {
  padding: 28px 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  position: relative;
}
.philosophy-item::before {
  counter-increment: phil;
  content: "0" counter(phil);
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.philosophy-item h3 { margin: 10px 0 10px; font-size: 1.25rem; }
.philosophy-item p { color: var(--text-muted); margin: 0; }

/* ── Waitlist / CTA ────────────────────────────────────────────────────── */
.cta-panel {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 60px 40px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background:
    radial-gradient(120% 120% at 50% 0%, rgba(34,211,238,0.10), transparent 60%),
    var(--bg-card);
}
.cta-panel h2 { font-size: clamp(1.7rem, 4vw, 2.3rem); margin: 0 0 14px; }
.cta-panel p { color: var(--text-muted); margin: 0 auto 30px; max-width: 460px; }
.cta-panel .contact-note {
  margin: 26px auto 0;
  max-width: 440px;
  font-size: 0.95rem;
}
.cta-panel .contact-note a {
  display: inline-block;
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
}
.cta-panel .contact-note a:hover { text-decoration: none; border-bottom-color: var(--accent); }

/* ── Footer ────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
  background: var(--bg-alt);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: center;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 30px; height: 30px; border-radius: 7px; }
.footer-inner p { color: var(--text-muted); margin: 0; font-size: 0.9rem; max-width: 420px; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { color: var(--text-muted); font-size: 0.9rem; }

/* ── Content pages (blog, posts, about) ────────────────────────────────── */
.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 70px 24px 90px;
}
.page h1 { font-size: clamp(2rem, 5vw, 2.8rem); margin: 0 0 12px; }
.page .meta { color: var(--text-muted); font-family: var(--mono); font-size: 0.85rem; margin-bottom: 40px; }
.page-content { font-size: 1.08rem; }
.page-content h2 { margin-top: 2em; }
.page-content a { text-decoration: underline; }
.page-content code {
  font-family: var(--mono);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.9em;
}
.page-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  overflow-x: auto;
}
.page-content pre code { background: none; border: none; padding: 0; }
.page-content blockquote {
  border-left: 3px solid var(--accent);
  margin: 1.4em 0;
  padding: 2px 20px;
  color: var(--text-muted);
}

/* "Follow on Mastodon" callout on the blog index */
.follow-note {
  margin: 0 0 40px;
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--text-muted);
  font-size: 0.98rem;
}
.follow-note a {
  font-family: var(--mono);
  font-weight: 500;
  white-space: nowrap;
}

/* Post list */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.post-list .post-date { font-family: var(--mono); font-size: 0.82rem; color: var(--text-muted); }
.post-list h3 { margin: 6px 0 8px; font-size: 1.35rem; }
.post-list h3 a { color: var(--text); }
.post-list h3 a:hover { color: var(--accent); text-decoration: none; }
.post-list p { color: var(--text-muted); margin: 0; }

.back-link { font-family: var(--mono); font-size: 0.85rem; }

/* ── Roadmap page (/roadmap/) ──────────────────────────────────────────── */
.roadmap-head-section { padding-bottom: 40px; }
.roadmap-body { padding-top: 56px; }

/* "What works today" — the real, shipped baseline. Deliberately distinct from
   the planned items so the today-vs-roadmap line is never blurry. */
.today-panel {
  max-width: 760px;
  margin: 0 auto 48px;
  padding: 28px 30px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-2);
  border-radius: var(--radius);
  background: var(--bg-card);
}
.today-tag,
.flagship-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.today-tag { color: var(--accent-2); background: rgba(45, 212, 191, 0.12); border: 1px solid var(--border); }
.today-panel h3 { font-size: 1.3rem; margin: 0 0 10px; }
.today-panel p { color: var(--text-muted); margin: 0; }

/* Flagship: the in-progress contributor lure. Bigger, glowing, unmissable. */
.flagship-card {
  max-width: 820px;
  margin: 0 auto 52px;
  padding: 40px 40px 42px;
  border: 1px solid var(--accent);
  border-radius: 20px;
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(34, 211, 238, 0.12), transparent 55%),
    var(--bg-card);
  box-shadow: 0 20px 60px -30px var(--glow);
}
.flagship-tag {
  color: #04121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  position: relative;
  padding-left: 26px;
}
.flagship-tag::before {
  content: "";
  position: absolute;
  left: 12px; top: 50%;
  width: 7px; height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: #04121a;
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
.flagship-card h3 { font-size: clamp(1.5rem, 3.5vw, 2rem); margin: 0 0 14px; }
.flagship-card p { color: var(--text); font-size: 1.08rem; margin: 0; opacity: 0.92; }

/* The rest — unordered on purpose. Bulleted cards, never numbered. */
.roadmap-lead {
  max-width: 820px;
  margin: 0 auto 22px;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}
.roadmap-list {
  max-width: 820px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}
.roadmap-list li {
  position: relative;
  padding: 24px 26px 24px 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.roadmap-list li::before {
  content: "";
  position: absolute;
  left: 24px; top: 32px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.roadmap-list li:hover { border-color: var(--accent); transform: translateX(3px); }
.roadmap-list h3 { font-size: 1.2rem; margin: 0 0 8px; }
.roadmap-list p { color: var(--text-muted); margin: 0; }

/* Contributor CTA at the foot of the page */
.roadmap-cta { max-width: 820px; margin: 56px auto 0; text-align: center; }
.roadmap-cta p { color: var(--text-muted); max-width: 540px; margin: 0 auto 26px; font-size: 1.05rem; }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links { display: none; }
  section { padding: 60px 0; }
  .hero-inner { padding: 90px 24px 80px; }
  .flagship-card { padding: 30px 24px; }
  .today-panel { padding: 24px 22px; }
}