:root {
  color-scheme: dark;
  --black: #030700;
  --panel: #091005;
  --panel-2: #101607;
  --line: rgba(181, 255, 31, 0.24);
  --green: #b6ff1e;
  --green-soft: #6ecb14;
  --mint: #5fffd6;
  --gold: #b89642;
  --text: #f1ffd8;
  --muted: #a8bd8b;
  --shadow: rgba(182, 255, 30, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 80% 8%, rgba(182, 255, 30, 0.14), transparent 30rem),
    radial-gradient(circle at 12% 45%, rgba(95, 255, 214, 0.08), transparent 24rem),
    linear-gradient(180deg, #010300 0%, var(--black) 42%, #070a02 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
}

.site-header {
  position: relative;
  min-height: 42vw;
  background: #000;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero-banner {
  display: block;
  width: 100%;
  height: auto;
}

.topbar {
  position: absolute;
  inset: 0 0 auto;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(1rem, 2.5vw, 2rem) clamp(1rem, 5vw, 4.5rem);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.74), transparent);
}

.brand,
.nav-link,
.button {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.brand {
  color: var(--green);
  font-size: clamp(1.05rem, 1.8vw, 1.4rem);
  text-shadow: 0 0 1rem var(--shadow);
}

.nav-link {
  padding: 0 1rem;
  border: 1px solid var(--line);
  background: rgba(3, 7, 0, 0.58);
  color: var(--text);
  border-radius: 8px;
}

main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.intro {
  padding: clamp(3rem, 7vw, 6rem) 0 clamp(2.5rem, 6vw, 5rem);
  max-width: 860px;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1rem;
  max-width: 12ch;
  color: #f7ffe7;
  font-size: clamp(3rem, 7vw, 6.1rem);
  line-height: 0.92;
  letter-spacing: 0;
  text-wrap: balance;
  text-shadow: 0 0 2rem rgba(182, 255, 30, 0.18);
}

h2 {
  margin-bottom: 0.8rem;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 1;
  letter-spacing: 0;
  text-wrap: balance;
}

h3 {
  margin-bottom: 0.65rem;
  font-size: 1.18rem;
  line-height: 1.2;
}

.lead,
.repo-callout p,
.feature-card p,
.site-footer p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.lead {
  max-width: 740px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  width: fit-content;
  max-width: 100%;
  padding: 0 1.15rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: linear-gradient(135deg, var(--green), #85d80e);
  border-color: rgba(232, 255, 116, 0.72);
  color: #091000;
  box-shadow: 0 0 1.6rem rgba(182, 255, 30, 0.22);
}

.button.secondary {
  background: rgba(14, 22, 5, 0.84);
  color: var(--text);
}

.feature-band {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  max-width: 680px;
  margin-bottom: 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  min-height: 17rem;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(182, 255, 30, 0.08), transparent),
    var(--panel);
}

.feature-mark {
  width: 3.2rem;
  height: 3.2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  border: 1px solid rgba(184, 150, 66, 0.5);
  border-radius: 50%;
  color: var(--green);
  background: rgba(184, 150, 66, 0.09);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-weight: 900;
}

.repo-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  padding: clamp(3rem, 7vw, 5rem) 0;
}

.repo-callout p {
  max-width: 670px;
}

.site-footer {
  width: min(1120px, calc(100% - 2rem));
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin: 0 auto;
  padding: 0 0 2rem;
}

.tag-sign {
  width: min(300px, 58vw);
  height: auto;
  filter: drop-shadow(0 0 1.2rem rgba(182, 255, 30, 0.3));
}

.site-footer p {
  margin: 0 0 0.4rem;
  color: var(--gold);
  font-weight: 800;
}

@media (max-width: 860px) {
  .site-header {
    min-height: 52vw;
  }

  .hero-banner {
    width: 150%;
    max-width: none;
    transform: translateX(-25%);
  }

  .feature-grid,
  .repo-callout {
    grid-template-columns: 1fr;
  }

  .repo-callout {
    align-items: start;
  }
}

@media (max-width: 560px) {
  .topbar {
    position: static;
    padding: 0.85rem 1rem;
    background: #030700;
  }

  .site-header {
    display: flex;
    flex-direction: column-reverse;
    min-height: 0;
  }

  .hero-banner {
    width: 190%;
    transform: translateX(-36%);
  }

  h1 {
    font-size: clamp(2.6rem, 16vw, 4rem);
  }

  .button {
    width: 100%;
  }

  .feature-card {
    min-height: auto;
  }

  .site-footer {
    align-items: start;
    flex-direction: column;
    gap: 1rem;
  }
}