:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-card: #11161d;
  --border: #232a33;
  --fg: #c9d1d9;
  --fg-dim: #8b949e;
  --accent: #39d353;
  --accent-2: #58a6ff;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.cursor { color: var(--accent); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav__brand { color: var(--fg); font-weight: 700; }
.nav__brand:hover { text-decoration: none; }
.nav__links { display: flex; gap: 1.4rem; }
.nav__links a { color: var(--fg-dim); font-size: 0.92rem; }
.nav__links a:hover { color: var(--accent); text-decoration: none; }
.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: var(--mono);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  border-radius: 4px;
}

/* Layout */
main { max-width: 880px; margin: 0 auto; padding: 0 1.5rem; }

.hero {
  padding: 5rem 0 3.5rem;
  border-bottom: 1px solid var(--border);
}
.hero__kicker { color: var(--accent); font-size: 0.9rem; margin-bottom: 0.8rem; }
.hero__title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  line-height: 1.2;
  margin-bottom: 1rem;
  font-weight: 700;
}
.hero__sub { color: var(--fg-dim); max-width: 60ch; margin-bottom: 1.8rem; }
.hero__cta { display: flex; gap: 0.8rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  background: var(--accent);
  color: #06120a;
  font-weight: 700;
  border-radius: 5px;
  border: 1px solid var(--accent);
}
.btn:hover { text-decoration: none; filter: brightness(1.1); }
.btn--ghost { background: transparent; color: var(--fg); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.section { padding: 3.5rem 0; border-bottom: 1px solid var(--border); }
.section__title { font-size: 1.4rem; margin-bottom: 1.5rem; }
.section__intro { color: var(--fg-dim); margin-bottom: 1.5rem; max-width: 65ch; }
.prefix { color: var(--accent); margin-right: 0.4rem; }
.section p { color: var(--fg-dim); margin-bottom: 1rem; }
.section strong { color: var(--fg); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card h3 { font-size: 1rem; margin-bottom: 0.5rem; color: var(--fg); }
.card p { font-size: 0.9rem; margin: 0; }

.list { list-style: none; display: flex; flex-direction: column; gap: 0.8rem; }
.list li { color: var(--fg-dim); display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap; }
.list em { color: #6e7681; font-size: 0.82rem; }

.tag {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-width: 64px;
  text-align: center;
}

.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--fg-dim);
  font-size: 0.85rem;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .cursor { animation: none; }
}

/* Mobile */
@media (max-width: 640px) {
  .nav__toggle { display: block; }
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 1.5rem 1rem;
  }
  .nav__links.open { display: flex; }
  .nav__links a { padding: 0.6rem 0; border-bottom: 1px solid var(--border); }
}