:root {
  --bg: #12161a;
  --bg-2: #1a2229;
  --ink: #e8eef2;
  --muted: #8a9aa6;
  --line: #2a353e;
  --accent: #2fbf8a;
  --accent-ink: #062218;
  --card: rgba(255, 255, 255, 0.03);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1f3a33 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #243044 0%, transparent 50%),
    linear-gradient(180deg, #0e1215 0%, var(--bg) 40%, #0c1013 100%);
  line-height: 1.55;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 0;
}

.top,
main,
footer {
  position: relative;
  z-index: 1;
  width: min(960px, calc(100% - 2rem));
  margin-inline: auto;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0 0.5rem;
  animation: rise 0.7s ease both;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}

.mark {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.4rem;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1;
}

.name {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 0.85rem;
}

nav {
  display: flex;
  gap: 1rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

nav a:hover {
  color: var(--ink);
}

.hero {
  padding: 4.5rem 0 3rem;
  animation: rise 0.8s 0.08s ease both;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.02em;
  max-width: 14ch;
}

.lede {
  margin: 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.1rem;
  border-radius: 0.55rem;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn.ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.02);
}

.btn.ghost:hover {
  border-color: var(--accent);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-bottom: 2.5rem;
  animation: rise 0.9s 0.16s ease both;
}

article,
.note {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  padding: 1.2rem 1.25rem 1.3rem;
  box-shadow: var(--shadow);
}

article h2,
.note h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

li + li {
  margin-top: 0.45rem;
}

.note {
  margin-bottom: 3rem;
  animation: rise 0.9s 0.22s ease both;
}

.note p {
  margin: 0;
  color: var(--muted);
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  color: var(--accent);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.25rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

footer a {
  color: var(--muted);
}

footer a:hover {
  color: var(--ink);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 800px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }

  h1 {
    max-width: none;
  }
}