:root {
  --bg: #070b12;
  --panel: rgba(16, 21, 31, 0.82);
  --panel-strong: rgba(18, 24, 37, 0.92);
  --line: rgba(140, 177, 233, 0.18);
  --text: #eef5ff;
  --muted: #a5b2c8;
  --blue: #74c4ff;
  --amber: #ff9b42;
  --ice: #deefff;
  --shadow: 0 26px 90px rgba(0, 0, 0, 0.44);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 0%, rgba(116, 196, 255, 0.12), transparent 24%),
    radial-gradient(circle at 80% 10%, rgba(255, 155, 66, 0.12), transparent 20%),
    linear-gradient(180deg, #05070d 0%, #0a1019 48%, #05070d 100%);
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, black 32%, transparent 85%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
code, pre { font-family: "IBM Plex Mono", monospace; }
.page-shell { width: min(1240px, calc(100vw - 40px)); margin: 0 auto; padding-bottom: 60px; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(7,11,18,0.94), rgba(7,11,18,0.34));
}
.brand { font-size: 1.05rem; font-weight: 700; letter-spacing: 0.22em; }
.site-nav { display: flex; gap: 18px; color: var(--muted); font-size: 0.92rem; }
.hero, .kernel-section, .loop-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}
.hero { padding: 40px 0 22px; }
.kernel-section, .loop-section { padding: 36px 0 26px; }
.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.hero h1, .section-heading h2 {
  margin: 0 0 16px;
  line-height: 1.02;
  letter-spacing: -0.04em;
}
.hero h1 { font-size: clamp(2.8rem, 6vw, 5.5rem); }
.lead, .section-heading p, .feature-card p, .problem-grid p, .link-card span {
  color: var(--muted);
  line-height: 1.75;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin: 28px 0 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-weight: 700;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}
.button.primary { background: linear-gradient(135deg, rgba(116,196,255,0.18), rgba(255,155,66,0.18)); }
.button.secondary { background: rgba(255,255,255,0.03); }
.button:hover, .link-card:hover {
  transform: translateY(-3px);
  border-color: rgba(222,239,255,0.28);
  background: rgba(16, 22, 36, 0.96);
}
.hero-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  color: var(--ice);
}
.hero-points li {
  padding-left: 16px;
  position: relative;
}
.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--amber));
  box-shadow: 0 0 14px rgba(116, 196, 255, 0.7);
}
.hero-visual img, .kernel-visual img, .loop-visual img {
  border-radius: 28px;
  border: 1px solid rgba(222,239,255,0.14);
  box-shadow: var(--shadow);
}
.problem-section, .demo-panel, .start-section { padding: 34px 0 28px; }
.problem-grid, .feature-grid, .demo-columns, .link-grid {
  display: grid;
  gap: 18px;
}
.problem-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
.problem-grid article, .feature-card, .demo-card, .link-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 24px;
}
.problem-grid article:nth-child(3) { grid-column: span 2; }
.problem-grid span, .feature-card h3, .demo-card h3, .link-card strong {
  display: block;
  margin-bottom: 10px;
  color: var(--ice);
}
.section-heading { max-width: 70ch; margin-bottom: 24px; }
.section-heading h2 { font-size: clamp(2rem, 4.8vw, 4rem); }
.demo-columns { grid-template-columns: repeat(2, 1fr); }
.demo-card pre {
  margin: 0;
  overflow: auto;
  white-space: pre-wrap;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ice);
}
.demo-card.output {
  background: linear-gradient(180deg, rgba(116,196,255,0.07), rgba(255,255,255,0.02)), var(--panel-strong);
}
.link-grid { grid-template-columns: repeat(3, 1fr); }
.link-card { transition: transform 180ms ease, border-color 180ms ease, background 180ms ease; }
.site-footer { padding: 40px 0 8px; color: var(--muted); text-align: center; font-size: 0.9rem; }

.docs-page .doc-main {
  padding: 36px 0 20px;
}

.doc-hero {
  max-width: 76ch;
  margin-bottom: 26px;
}

.doc-hero h1 {
  margin: 0 0 14px;
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
}

.doc-prose {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 28px;
  max-width: 900px;
}

.doc-prose a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: rgba(116, 196, 255, 0.5);
  text-underline-offset: 0.18em;
}

.doc-prose a:hover {
  color: var(--ice);
  text-decoration-color: rgba(222, 239, 255, 0.8);
}

.doc-prose p,
.doc-prose li,
.doc-prose blockquote {
  color: var(--muted);
  line-height: 1.75;
}

.doc-prose h1,
.doc-prose h2,
.doc-prose h3,
.doc-prose h4 {
  color: var(--ice);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.doc-prose h1 { font-size: clamp(2rem, 4vw, 3rem); }
.doc-prose h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-top: 2.2rem; }
.doc-prose h3 { font-size: 1.25rem; margin-top: 1.6rem; }

.doc-prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}

.doc-prose ul,
.doc-prose ol {
  padding-left: 1.4rem;
}

.doc-prose li + li {
  margin-top: 0.35rem;
}

.doc-prose code {
  color: var(--ice);
  background: rgba(116, 196, 255, 0.08);
  border: 1px solid rgba(116, 196, 255, 0.12);
  padding: 0.08rem 0.34rem;
  border-radius: 8px;
}

.doc-prose pre {
  margin: 1.2rem 0;
  overflow: auto;
  white-space: pre-wrap;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  color: var(--ice);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

.doc-prose pre code {
  background: transparent;
  border: 0;
  padding: 0;
  border-radius: 0;
}

.doc-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  font-size: 0.95rem;
}

.doc-prose th,
.doc-prose td {
  border: 1px solid var(--line);
  padding: 0.75rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.doc-prose th {
  color: var(--ice);
  background: rgba(116, 196, 255, 0.08);
}

.doc-prose blockquote {
  margin: 1.2rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid rgba(116, 196, 255, 0.55);
}

.doc-prose strong {
  color: var(--ice);
}

.doc-prose .highlighter-rouge,
.doc-prose div.highlighter-rouge {
  margin: 1.2rem 0;
}

@media (max-width: 980px) {
  .hero, .kernel-section, .loop-section, .problem-grid, .feature-grid, .demo-columns, .link-grid { grid-template-columns: 1fr; }
  .problem-grid article:nth-child(3) { grid-column: auto; }
  .site-header { flex-direction: column; gap: 12px; align-items: flex-start; }
  .site-nav { flex-wrap: wrap; gap: 12px; }
  .doc-prose { padding: 22px; }
}
@media (max-width: 640px) {
  .page-shell { width: min(100vw - 24px, 1240px); }
  .button { width: 100%; text-align: center; }
}