/* ================================================================
   blog.css — shared stylesheet for hareng.dev/blog
   Exact design tokens from index.html. No new framework.
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;1,9..144,400&family=JetBrains+Mono:wght@300;400;500;600&family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-0: #050807;
  --bg-1: #0a0e0d;
  --bg-2: #0f1513;
  --bg-3: #141b18;
  --line: rgba(52,211,153,0.12);
  --line-strong: rgba(52,211,153,0.28);
  --emerald: #10b981;
  --emerald-bright: #34d399;
  --emerald-soft: #6ee7b7;
  --emerald-deep: #047857;
  --emerald-glow: rgba(16,185,129,0.35);
  --text: #e8f0ed;
  --text-dim: #9ba8a3;
  --text-faint: #5a6b66;
  --display: 'Fraunces', serif;
  --sans: 'Outfit', sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
::selection { background: var(--emerald); color: var(--bg-0); }

/* ===== AMBIENT BACKGROUND (CSS-only, no JS orbs) ===== */
.ambient {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse at 15% 10%, rgba(16,185,129,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 90%, rgba(6,95,70,0.14) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(4,120,87,0.04) 0%, transparent 60%),
    var(--bg-0);
}

/* ===== NAVIGATION — exact match to main site ===== */
.blog-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 1.1rem 0;
  background: linear-gradient(180deg, rgba(5,8,7,0.88) 0%, rgba(5,8,7,0.6) 100%);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
.blog-nav .nav-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 2rem;
  display: flex; justify-content: space-between; align-items: center;
}
.blog-nav .logo {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
  text-transform: uppercase;
  display: flex; align-items: center; gap: 0.5rem;
  transition: transform .4s cubic-bezier(.4,0,.2,1);
}
.blog-nav .logo::before {
  content: '';
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--emerald-bright);
  box-shadow: 0 0 12px var(--emerald-glow), 0 0 24px var(--emerald-glow);
  animation: pulse 2.5s ease-in-out infinite;
  flex-shrink: 0;
}
.blog-nav .logo:hover { transform: translateY(-2px); }
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50% { opacity:0.5; transform:scale(0.7); }
}
.blog-nav .nav-links {
  display: flex; gap: 0.25rem; align-items: center; list-style: none;
}
.blog-nav .nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.93rem;
  padding: 0.6rem 1.1rem;
  border-radius: 10px;
  transition: color .3s ease;
  position: relative;
  letter-spacing: 0.01em;
}
.blog-nav .nav-links a::after {
  content: '';
  position: absolute; left: 50%; bottom: 0.3rem;
  width: 0; height: 2px;
  background: var(--emerald-bright);
  transform: translateX(-50%);
  transition: width .3s ease;
  border-radius: 2px;
  box-shadow: 0 0 8px var(--emerald-glow);
}
.blog-nav .nav-links a:hover { color: var(--text); }
.blog-nav .nav-links a:hover::after { width: 18px; }
.blog-nav .nav-links a.active { color: var(--emerald-bright); }
.blog-nav .nav-links a.active::after { width: 18px; }

/* ===== SHARED CONTAINER ===== */
.container {
  max-width: 1240px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 2;
}

/* ===== BLOG INDEX — listing page ===== */
.blog-main {
  position: relative; z-index: 2;
  padding-top: 96px;
}
.blog-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--line);
}
.blog-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--emerald-soft);
  margin-bottom: 1rem;
  display: flex; align-items: center; gap: 0.7rem;
}
.blog-eyebrow::before {
  content: ''; width: 24px; height: 1px; background: var(--emerald);
}
.blog-title {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: 1rem;
}
.blog-title em { font-style: italic; color: var(--emerald-bright); }
.blog-subtitle {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 560px;
  line-height: 1.7;
}

/* Post list */
.post-list {
  padding: 3rem 0 6rem;
  display: flex; flex-direction: column; gap: 1.6rem;
}
.post-card {
  padding: 2rem 2rem 1.8rem;
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border: 1px solid var(--line);
  border-radius: 18px;
  transition: all .35s cubic-bezier(.4,0,.2,1);
  position: relative; overflow: hidden;
  text-decoration: none; color: inherit;
  display: block;
}
.post-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong) 50%, transparent);
}
.post-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px -12px rgba(0,0,0,0.5), 0 0 0 1px rgba(52,211,153,0.15);
}
.post-card-meta {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 0.9rem; flex-wrap: wrap;
}
.post-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  background: rgba(16,185,129,0.1);
  color: var(--emerald-soft);
  border: 1px solid rgba(52,211,153,0.2);
  letter-spacing: 0.06em;
}
.post-card h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.3rem, 2.5vw, 1.65rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 0.7rem;
  transition: color .3s ease;
}
.post-card:hover h2 { color: var(--emerald-soft); }
.post-hook {
  font-size: 1rem;
  color: var(--text-dim);
  line-height: 1.65;
  margin-bottom: 1.2rem;
}
.read-more {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--emerald-bright);
  text-decoration: none;
  letter-spacing: 0.06em;
  display: inline-flex; align-items: center; gap: 0.3rem;
  transition: gap .25s ease;
}
.post-card:hover .read-more { gap: 0.6rem; }

/* ===== POST PAGE — reading layout ===== */
.post-main {
  position: relative; z-index: 2;
  padding-top: 96px;
}
.post-container {
  max-width: 740px; margin: 0 auto; padding: 0 2rem;
}
.post-back {
  padding: 2.5rem 0 0;
}
.back-link {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  text-decoration: none;
  letter-spacing: 0.06em;
  display: inline-flex; align-items: center; gap: 0.4rem;
  transition: color .25s ease;
}
.back-link:hover { color: var(--emerald-bright); }

.post-header {
  padding: 2.5rem 0 2.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 3rem;
}
.post-header .post-card-meta { margin-bottom: 1.2rem; }
.post-header h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: 1.2rem;
}
.post-lede {
  font-size: 1.18rem;
  color: var(--text-dim);
  line-height: 1.75;
  font-style: italic;
  font-family: var(--display);
}

/* Prose — the actual article body */
.prose {
  padding-bottom: 5rem;
}
.prose p {
  font-size: 1.05rem;
  color: var(--text-dim);
  line-height: 1.85;
  margin-bottom: 1.6rem;
}
.prose p strong {
  color: var(--text);
  font-weight: 500;
}
.prose h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.4rem, 2.8vw, 1.8rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  margin: 3rem 0 1.2rem;
}
.prose h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  margin: 2.4rem 0 0.8rem;
  letter-spacing: 0.01em;
}
.prose a {
  color: var(--emerald-bright);
  text-decoration: underline;
  text-decoration-color: rgba(52,211,153,0.35);
  text-underline-offset: 3px;
  transition: text-decoration-color .2s ease, color .2s ease;
}
.prose a:hover {
  color: var(--emerald-soft);
  text-decoration-color: var(--emerald-bright);
}
.prose code {
  font-family: var(--mono);
  font-size: 0.88em;
  color: var(--emerald-soft);
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(52,211,153,0.2);
  padding: 0.12em 0.45em;
  border-radius: 5px;
}
.prose ul, .prose ol {
  color: var(--text-dim);
  font-size: 1.05rem;
  line-height: 1.85;
  padding-left: 1.4rem;
  margin-bottom: 1.6rem;
}
.prose li { margin-bottom: 0.5rem; }
.prose hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 3rem 0;
}
.prose blockquote {
  border-left: 3px solid var(--emerald-deep);
  padding: 0.6rem 0 0.6rem 1.4rem;
  margin: 2rem 0;
  color: var(--text-dim);
  font-style: italic;
}

/* Post footer */
.post-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 5rem;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.repo-link {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.7rem 1.4rem;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  color: var(--emerald-bright);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: all .3s ease;
}
.repo-link:hover {
  border-color: var(--emerald);
  background: linear-gradient(180deg, rgba(16,185,129,0.12), rgba(16,185,129,0.04));
  transform: translateY(-2px);
}

/* Site footer */
.site-footer {
  position: relative; z-index: 2;
  border-top: 1px solid var(--line);
  padding: 1.8rem 0;
  text-align: center;
}
.site-footer p {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  letter-spacing: 0.06em;
}
.site-footer a { color: var(--text-faint); text-decoration: none; }
.site-footer a:hover { color: var(--emerald-bright); }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .container, .post-container { padding: 0 1.3rem; }
  .blog-header { padding: 3rem 0 2rem; }
  .post-list { padding-top: 2rem; }
  .post-card { padding: 1.6rem 1.4rem; }
  .blog-nav .nav-links a { padding: 0.5rem 0.7rem; font-size: 0.85rem; }
  .post-header { padding: 2rem 0; margin-bottom: 2rem; }
}