:root {
  --bg: #0d141f;
  --bg-soft: #131f2e;
  --text: #f2f7ff;
  --muted: #9fb2cb;
  --line: #24374f;
  --brand: #7be495;
  --accent: #4aa3ff;
  --card: rgba(19, 31, 46, 0.75);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 700px at 85% -10%, #1f3d61 0%, var(--bg) 60%);
  color: var(--text);
  font-family: "Space Grotesk", system-ui, -apple-system, sans-serif;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(123, 228, 149, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(123, 228, 149, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black 45%, transparent 85%);
  pointer-events: none;
}

.nav,
main,
.footer {
  width: min(1100px, 92vw);
  margin: 0 auto;
  position: relative;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  gap: 10px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.06em;
}

.version {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 0.78rem;
  color: #d5e0ef;
  background: rgba(9, 16, 24, 0.55);
}

.hero {
  padding: 38px 0 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(220px, 320px);
  gap: 28px;
  align-items: center;
}

.hero-copy {
  min-width: 0;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual img {
  width: min(100%, 280px);
  height: auto;
  display: block;
  filter: drop-shadow(0 16px 28px rgba(0, 0, 0, 0.28));
}

.eyebrow {
  color: var(--brand);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin: 0 0 8px;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1.07;
  margin: 0;
  max-width: 15ch;
}

.sub {
  margin-top: 16px;
  color: var(--muted);
  max-width: 58ch;
  line-height: 1.6;
}

.cta-row {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.btn {
  border: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
  transition: transform .15s ease, border-color .15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.btn.primary {
  background: linear-gradient(135deg, var(--brand), #5fd2f6);
  color: #091016;
  border-color: transparent;
}

.btn.ghost {
  font-size: 0.9rem;
  padding: 8px 12px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chips span {
  font-size: 0.8rem;
  color: #c5d4e8;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(0, 0, 0, 0.15);
}

.section {
  padding: 26px 0;
}

.section h2 {
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  margin: 0 0 14px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 14px;
  padding: 16px;
  backdrop-filter: blur(6px);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 1.04rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.download {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 14px;
  padding: 16px;
}

.download p {
  margin: 0 0 8px;
  color: var(--muted);
}

.download .checksum {
  margin-top: 10px;
}

code {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  color: #d7e7ff;
  background: rgba(8, 13, 20, 0.5);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 2px 6px;
}

.split {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 14px;
}

ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.65;
  color: var(--muted);
}

.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(160deg, rgba(19, 31, 46, 0.85), rgba(13, 20, 31, 0.8));
  padding: 16px;
}

.kicker {
  margin: 0;
  color: var(--brand);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mono {
  margin: 12px 0 0;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #d1def0;
  font-size: 0.86rem;
}

.footer {
  padding: 28px 0 36px;
  color: #8ea1bb;
}

@media (max-width: 860px) {
  .hero-grid,
  .cards,
  .split {
    grid-template-columns: 1fr;
  }

  .nav {
    flex-wrap: wrap;
  }

  .nav-right {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .hero {
    padding-top: 28px;
  }

  .hero-visual {
    justify-content: flex-start;
  }

  .hero-visual img {
    width: min(58vw, 230px);
  }
}