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

:root {
  --bg: #1a1a1a;
  --surface-1: #0a0a0a;
  --surface-2: #111111;
  --surface-3: #1a1a1a;
  --border: #1e1e1e;
  --text: #e5e5e5;
  --text-muted: #737373;
  --accent: #d45500;
  --accent-light: #f0842e;
  --accent-glow: rgba(226, 98, 10, 0.15);
}

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.mono { font-family: 'JetBrains Mono', monospace; }

/* Nav */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 64px;
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--text);
  font-weight: 600;
}
.nav-logo img { width: 40px; height: 40px; border-radius: 6px; }
.nav-logo em { font-style: normal; color: var(--text-muted); font-weight: 500; }
.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }

/* Layout */
main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 6rem 2rem 4rem;
}

.hero {
  padding: 3rem 0 4rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.hero .lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 640px;
}

section { margin-bottom: 4rem; }
section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}
.section-lead {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}
.card {
  display: block;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  color: var(--text);
}
.card-kicker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}
.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}
.card-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Article / lab pages */
.article {
  max-width: 760px;
}
.article h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.article .article-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}
.article h2 {
  font-size: 1.5rem;
  margin: 2.5rem 0 0.75rem;
}
.article p { margin-bottom: 1rem; color: var(--text); }
.article ul { padding-left: 1.5rem; margin-bottom: 1rem; color: var(--text); }
.article li { margin-bottom: 0.4rem; }

.resource-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
  margin: 2rem 0 1rem;
  list-style: none;
  padding: 0;
}
.resource-list li { margin: 0; }
.resource-list a {
  display: block;
  padding: 1rem 1.25rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
}
.resource-list a:hover {
  border-color: var(--accent);
  color: var(--text);
}
.resource-list .label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.back-link:hover { color: var(--text); }

footer {
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  nav { padding: 0 1rem; }
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.85rem; }
  main { padding: 5rem 1rem 3rem; }
}