/* ---------- Colors: change these to restyle the whole site ---------- */
:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --border: #272e38;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

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

/* ---------- Navigation ---------- */
nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
nav .logo { font-weight: 700; color: var(--text); }
nav ul { display: flex; gap: 20px; list-style: none; margin: 0; padding: 0; }
nav ul a { color: var(--muted); }
nav ul a:hover { color: var(--text); text-decoration: none; }

/* ---------- Layout ---------- */
main { max-width: 900px; margin: 0 auto; padding: 0 24px; }
section { padding: 72px 0 24px; scroll-margin-top: 40px; }
h1 { font-size: clamp(2.2rem, 6vw, 3.5rem); margin: 0 0 12px; line-height: 1.15; }
h2 { font-size: 1.6rem; margin: 0 0 8px; }
h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  margin-top: 8px;
  background: var(--accent);
  border-radius: 2px;
}
p { color: var(--muted); max-width: 65ch; }

/* ---------- Hero ---------- */
.hero { padding-top: 110px; padding-bottom: 40px; }
.hero .hi { color: var(--accent); font-weight: 600; margin: 0 0 8px; }
.hero .tagline { font-size: 1.15rem; }

.buttons { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  font-weight: 600;
}
.btn.primary { background: var(--accent); color: #0d1117; }
.btn:hover { text-decoration: none; opacity: 0.85; }

/* ---------- Cards ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: transform 0.15s, border-color 0.15s;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card h3 { margin: 0 0 6px; }
.card p { margin: 0; font-size: 0.95rem; }
.tag {
  display: inline-block;
  margin-top: 12px;
  padding: 2px 10px;
  font-size: 0.8rem;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.more { display: inline-block; margin-top: 20px; font-weight: 600; }

/* ---------- Footer ---------- */
footer {
  margin-top: 80px;
  padding: 28px 24px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

/* ---------- Small screens ---------- */
@media (max-width: 560px) {
  nav { flex-direction: column; gap: 8px; }
  nav ul { gap: 14px; }
}