:root {
  --bg: #05080a;
  --panel: #0c1117;
  --panel-2: #121a22;
  --border: #1d2935;
  --text: #d7e2ec;
  --muted: #7c8a99;
  --accent: #39ff14;
  --accent-dim: #2bbf12;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(5, 8, 10, 0.85);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: 4px;
  min-height: 56px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text);
  font-size: 16px;
}

.logo:hover {
  text-decoration: none;
}

.logo .muted {
  color: var(--muted);
  font-weight: 400;
}

.logo .dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 8px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent);
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.3;
  -webkit-mask-image: radial-gradient(
    ellipse 90% 80% at 50% 0%,
    black 25%,
    transparent 72%
  );
  mask-image: radial-gradient(
    ellipse 90% 80% at 50% 0%,
    black 25%,
    transparent 72%
  );
  pointer-events: none;
}

.hero .container {
  position: relative;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: -0.5px;
}

.hero h1 .accent {
  color: var(--accent);
  text-shadow: 0 0 24px rgba(57, 255, 20, 0.35);
}

.hero .tagline {
  max-width: 640px;
  margin: 0 auto 30px;
  color: var(--muted);
  font-size: 18px;
}

.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 34px;
}

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--text);
  transition:
    background 0.12s,
    border-color 0.12s,
    transform 0.12s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: #04140a;
}

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

.btn.ghost:hover {
  background: var(--panel-2);
  border-color: #2a3a4a;
}

.hero .one-liner {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
}

.hero .one-liner .accent {
  color: var(--accent);
}

/* Sections */
section {
  padding: 64px 0 8px;
}

.section-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  font-family: var(--mono);
  margin: 0 0 6px;
}

section h2 {
  font-size: 28px;
  margin: 0 0 10px;
  letter-spacing: -0.3px;
}

.section-intro {
  color: var(--muted);
  max-width: 640px;
  margin: 0 0 28px;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  transition: border-color 0.15s;
}

.card:hover {
  border-color: #2a3a4a;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.card h3 .icon {
  color: var(--accent);
  margin-right: 6px;
  font-family: var(--mono);
}

.card p {
  margin: 0;
  font-size: 13.5px;
  color: var(--muted);
}

/* Code blocks */
.code-block {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  overflow-x: auto;
  margin: 0 0 16px;
}

.code-block code {
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--text);
  white-space: pre;
}

.code-block .cmt {
  color: var(--muted);
}

.code-block .acc {
  color: var(--accent);
}

.run-step h3 {
  font-size: 17px;
  margin: 30px 0 6px;
}

.run-step p {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 12px;
}

/* Pattern gallery */
.patterns-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.pattern-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}

.pattern-card:hover {
  border-color: var(--accent-dim);
  box-shadow: 0 0 18px rgba(57, 255, 20, 0.08);
}

.pattern-card.wide {
  grid-column: 1 / -1;
}

.pattern-figure {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  height: 120px;
  margin-bottom: 12px;
}

.pattern-card.wide .pattern-figure {
  height: 140px;
}

.pattern-svg {
  max-width: 100%;
  max-height: 100%;
  fill: var(--accent);
}

.pattern-card h3 {
  margin: 0 0 4px;
  font-size: 14px;
}

.pattern-card p {
  margin: 0;
  font-size: 12.5px;
  color: var(--muted);
}

/* Demo */
.demo-slot {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 36px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.demo-slot code {
  font-family: var(--mono);
  color: var(--text);
}

.demo-img {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  display: block;
}

.demo-caption {
  margin: 8px 0 16px;
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
}

/* Footer */
.site-footer {
  margin-top: 72px;
  border-top: 1px solid var(--border);
  padding: 26px 0 34px;
  font-size: 13px;
  color: var(--muted);
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

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

.site-footer a:hover {
  color: var(--text);
}

.footer-links {
  display: flex;
  gap: 16px;
}

/* Responsive */
@media (max-width: 860px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .patterns-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .hero {
    padding: 56px 0 48px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero .one-liner {
    font-size: 11.5px;
    max-width: 100%;
    overflow-x: auto;
  }

  .features-grid,
  .patterns-grid {
    grid-template-columns: 1fr;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }

  .nav {
    gap: 12px;
    font-size: 13px;
  }
}