:root {
  --bg:         #0d1117;
  --bg-card:    #161b22;
  --bg-hover:   #1c2128;
  --border:     #30363d;
  --text:       #e6edf3;
  --text-muted: #7d8590;
  --accent:     #58a6ff;
  --accent-dim: #1f3a5f;
  --green:      #3fb950;
  --yellow:     #d29922;
  --red:        #f85149;
  --radius:     8px;
  --font:       'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}
a:hover { opacity: 0.8; }

/* Nav */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 600;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); opacity: 1; }

/* Layout */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

section { padding: 4rem 0; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

h1 { font-size: 2.5rem; font-weight: 700; line-height: 1.2; }
h2 { font-size: 1.5rem; font-weight: 600; margin-bottom: 1.5rem; }
h3 { font-size: 1.1rem; font-weight: 600; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, background 0.2s;
}
.card:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
}

/* Tags */
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

/* Status dot */
.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.4rem;
}
.dot-green  { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot-yellow { background: var(--yellow); }
.dot-red    { background: var(--red); }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

/* Responsive */
@media (max-width: 600px) {
  h1 { font-size: 1.8rem; }
  .nav-links { gap: 1rem; }
  section { padding: 2.5rem 0; }
}