:root {
  --bg: #070b14;
  --bg-elev: #0d1524;
  --bg-card: #111a2c;
  --line: #1e2c45;
  --text: #e8eef8;
  --muted: #93a0b8;
  --cyan: #3ee0d4;
  --cyan-dim: #1aa89e;
  --amber: #f0b429;
  --max: 1120px;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --font: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 10% -10%, #12304a 0%, transparent 55%),
              radial-gradient(900px 500px at 100% 0%, #1a1638 0%, transparent 50%),
              var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #9ff7f0; }
img { max-width: 100%; height: auto; display: block; }

.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

header.site {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(7, 11, 20, 0.78);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  font-family: var(--sans); font-weight: 700; letter-spacing: -0.03em;
  color: var(--text); text-decoration: none; font-size: 1.15rem;
}
.brand span { color: var(--cyan); }
.brand small {
  font-weight: 500; color: var(--muted); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
}
.nav-links { display: flex; gap: 18px; font-size: 0.92rem; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover { color: var(--text); }

.hero { padding: 56px 0 28px; }
.hero h1 {
  font-family: var(--font);
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 1.12; letter-spacing: -0.03em; margin: 0 0 14px;
}
.hero p.lead { color: var(--muted); max-width: 62ch; font-size: 1.08rem; margin: 0 0 22px; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  border: 1px solid var(--line); background: var(--bg-elev);
  color: var(--muted); padding: 6px 10px; border-radius: 999px; font-size: 0.78rem;
}

.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px; padding: 10px 0 60px;
}
.card {
  background: linear-gradient(180deg, var(--bg-card), #0c1422);
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); text-decoration: none; color: inherit;
  display: flex; flex-direction: column; transition: transform .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-4px); border-color: #2b6f6a; }
.card img { aspect-ratio: 16/10; object-fit: cover; width: 100%; }
.card .body { padding: 16px 18px 20px; }
.card .meta { color: var(--muted); font-size: 0.78rem; margin-bottom: 8px; }
.card h2 { font-size: 1.15rem; line-height: 1.3; margin: 0 0 8px; letter-spacing: -0.02em; }
.card p { color: var(--muted); font-size: 0.92rem; margin: 0; }

article.post { padding: 36px 0 70px; }
.post-hero img {
  width: 100%; border-radius: 16px; aspect-ratio: 16/8; object-fit: cover;
  border: 1px solid var(--line); margin: 18px 0 8px;
}
.post header h1 {
  font-family: var(--font);
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  line-height: 1.15; letter-spacing: -0.03em; margin: 8px 0 12px;
}
.post .meta { color: var(--muted); font-size: 0.9rem; }
.kw {
  display: inline-block; margin: 10px 6px 0 0; padding: 3px 8px;
  border: 1px solid var(--line); border-radius: 999px; color: var(--cyan);
  font-size: 0.75rem;
}
.content { max-width: 74ch; }
.content h2 {
  font-family: var(--font); font-size: 1.55rem; margin: 1.7em 0 0.5em; letter-spacing: -0.02em;
}
.content h3 { font-size: 1.15rem; margin: 1.3em 0 0.4em; color: #d5e4ff; }
.content p { margin: 0 0 1em; }
.content ul, .content ol { margin: 0 0 1.1em; padding-left: 1.2em; color: #d7e0ef; }
.content li { margin: 0.28em 0; }
.content blockquote {
  margin: 1.2em 0; padding: 12px 16px; border-left: 3px solid var(--cyan);
  background: #0e1a2c; color: #c9d6ea; border-radius: 0 10px 10px 0;
}
.content table {
  width: 100%; border-collapse: collapse; font-size: 0.9rem; margin: 0 0 1.3em;
}
.content th, .content td {
  text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line);
}
.content th { color: var(--cyan); font-weight: 600; }
.content code, .content pre {
  font-family: var(--mono); font-size: 0.86rem;
}
.content code {
  background: #152033; padding: 1px 6px; border-radius: 5px; color: #b7f3ee;
}
.content pre {
  background: #0a1220; border: 1px solid var(--line); padding: 14px 16px;
  border-radius: 10px; overflow-x: auto; line-height: 1.5;
}
.related {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line);
}
.related a { display: block; margin: 6px 0; }

footer.site {
  border-top: 1px solid var(--line);
  background: #060910;
  padding: 28px 0 36px;
  color: var(--muted); font-size: 0.9rem;
}
footer.site .row {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center;
}
footer.site .home-link {
  color: var(--cyan); font-weight: 700; letter-spacing: 0.02em; text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}
footer.site .home-link:hover { color: #fff; }

@media (max-width: 720px) {
  .nav-links { display: none; }
  .hero { padding-top: 32px; }
  article.post { padding-top: 22px; }
}