:root {
  --bg0: #0c1210;
  --bg1: #121a17;
  --ink: #e8f2ec;
  --muted: #9bb0a4;
  --line: rgba(232, 242, 236, 0.12);
  --accent: #3dffa8;
  --accent-dim: #1a6b4a;
  --warn: #ffb86b;
  --font-display: "Syne", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(61, 255, 168, 0.14), transparent 55%),
    radial-gradient(900px 500px at -10% 40%, rgba(26, 107, 74, 0.35), transparent 50%),
    linear-gradient(180deg, var(--bg0), #080c0a 60%, #0a100e);
  min-height: 100vh;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.04;
  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='4' 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; }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}
.logo span { color: var(--accent); }

nav {
  display: flex;
  gap: 1.25rem;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
nav a:hover { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  background: var(--accent);
  color: #04140d;
  font-weight: 600;
  text-decoration: none;
  border: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(61, 255, 168, 0.25);
}
.btn-sm { padding: 0.55rem 1rem; font-size: 0.9rem; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { box-shadow: none; border-color: var(--muted); }

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  min-height: calc(100vh - 5rem);
  padding: clamp(2rem, 6vw, 5rem) clamp(1.25rem, 4vw, 3rem);
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  margin: 0 0 0.75rem;
  background: linear-gradient(120deg, var(--ink), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: rise 0.9s ease both;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  margin: 0 0 1rem;
  max-width: 18ch;
  animation: rise 0.9s ease 0.08s both;
}

.lede {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
  max-width: 38ch;
  margin: 0 0 1.5rem;
  animation: rise 0.9s ease 0.16s both;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  animation: rise 0.9s ease 0.24s both;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  animation: rise 0.9s ease 0.3s both;
}
.meta strong { color: var(--accent); }

.hero-visual { animation: float-in 1.1s ease 0.2s both; }
.desk {
  aspect-ratio: 4/3;
  border-radius: 1.25rem;
  padding: 1.25rem;
  background:
    linear-gradient(145deg, rgba(255,255,255,0.06), transparent 40%),
    linear-gradient(180deg, #1a2621, #0d1411);
  border: 1px solid var(--line);
  box-shadow: 0 40px 80px rgba(0,0,0,0.45);
}
.screen {
  height: 100%;
  border-radius: 0.75rem;
  background: #07100c;
  border: 1px solid rgba(61,255,168,0.2);
  display: grid;
  place-items: center;
  padding: 1.25rem;
}
.chooser {
  width: min(100%, 280px);
  display: grid;
  gap: 0.55rem;
}
.chooser-title {
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.step { color: var(--muted); font-size: 0.8rem; margin-top: 0.35rem; }
.chip {
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-radius: 0.65rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font: inherit;
}
.chip.active {
  border-color: var(--accent);
  background: rgba(61,255,168,0.1);
}

.section {
  padding: clamp(3rem, 8vw, 6rem) clamp(1.25rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
  max-width: 1100px;
  margin: 0 auto;
}
.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
}
.section-lede {
  color: var(--muted);
  max-width: 50ch;
  margin: 0 0 2rem;
  line-height: 1.55;
}

.editions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.edition {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255,255,255,0.02);
}
.edition-lite {
  background: linear-gradient(160deg, rgba(61,255,168,0.08), transparent 55%);
}
.edition h3 {
  font-family: var(--font-display);
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
}
.edition p { color: var(--muted); margin-top: 0; }
.edition ul {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
  color: var(--ink);
  line-height: 1.7;
}

.toolbox-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.toolbox-grid div {
  padding: 1.1rem 1.2rem;
  border-top: 2px solid var(--accent-dim);
}
.toolbox-grid strong {
  display: block;
  font-family: var(--font-display);
  margin-bottom: 0.35rem;
}
.toolbox-grid span { color: var(--muted); font-size: 0.95rem; }

.dl-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(61,255,168,0.05);
}
.ver { margin: 0; font-size: 1.2rem; }
.sha { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.9rem; }
.donate-note { color: var(--muted); margin: 1.25rem 0 0.5rem; }
.link { color: var(--accent); }

.log h3 {
  font-family: var(--font-display);
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.log ul { line-height: 1.7; color: var(--muted); }

footer {
  padding: 2rem clamp(1.25rem, 4vw, 3rem) 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
.fine { opacity: 0.75; }

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
@keyframes float-in {
  from { opacity: 0; transform: translateY(24px) scale(0.98); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .editions, .toolbox-grid { grid-template-columns: 1fr; }
}