:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --border: #21262d;
  --text: #c9d1d9;
  --text-dim: #8b949e;
  --accent: #7ee787;
  --accent2: #79c0ff;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(ellipse at top, #1a2230 0%, var(--bg) 60%);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 45ch;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
  padding: 3rem 0 4rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.card.wide { grid-column: 1 / -1; }

.card h2 {
  font-size: 1.1rem;
  color: var(--accent2);
  margin-bottom: 0.75rem;
}

.card p { color: var(--text); font-size: 0.95rem; }

code {
  background: #1f2733;
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85em;
  color: var(--accent);
}

.stack { list-style: none; }

.stack li { display: flex; gap: 0.6rem; margin-bottom: 0.6rem; font-size: 0.95rem; }

.dot {
  flex-shrink: 0;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 0.55rem;
}

details summary {
  cursor: pointer;
  color: var(--accent2);
  font-size: 0.9rem;
  margin: 0.75rem 0 0.5rem;
}

details ul { margin: 0.5rem 0 0 1.25rem; font-size: 0.9rem; color: var(--text-dim); }

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

th { color: var(--text-dim); font-weight: 600; }

.roadmap { list-style: none; }

.roadmap li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border);
  font-size: 0.95rem;
}

.roadmap li:last-child { border-bottom: none; }

.roadmap li.next { color: var(--text-dim); }

.roadmap li.done::before { content: "✔"; color: var(--accent); font-weight: 700; }
.roadmap li.next::before { content: "→"; color: var(--accent2); font-weight: 700; }
.roadmap li:last-child::before { content: "○"; color: var(--text-dim); }

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

footer a { color: var(--accent2); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .hero h1 { font-size: 2.2rem; }
  .grid { grid-template-columns: 1fr; }
}