:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #ffffff;
  --muted: #666;
  --accent: #2563eb;
  --card-bg: #f5f5f7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f0f0f0;
    --bg: #121212;
    --muted: #aaa;
    --accent: #60a5fa;
    --card-bg: #1e1e1e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
}

.hero {
  padding: 4rem 1.5rem 3rem;
  text-align: center;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 2.25rem;
}

.tagline {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.btn {
  display: inline-block;
  margin: 0 0.4rem;
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  text-decoration: none;
}
.btn:hover { background: var(--accent); color: #fff; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
}

.skills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
}
.skills li {
  background: var(--card-bg);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  display: block;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.2rem;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease;
}
.card:hover { transform: translateY(-2px); }
.card h3 { margin: 0 0 0.4rem; color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 0.9rem; }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 2rem 0;
}