:root {
  --bg: #f3f5f7;
  --ink: #101820;
  --muted: #5a6570;
  --line: #e2e6ea;
  --accent: #1c2b3a;
  --accent-ink: #f3f5f7;
  --halt: #c2410c;
  --danger: #b42318;
  --ok: #0f6b4c;
  --font-d: "DM Sans", system-ui, sans-serif;
  --font-b: "DM Sans", system-ui, sans-serif;
  --font-m: "JetBrains Mono", ui-monospace, monospace;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --max: 760px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-b);
  font-size: 16px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  color: var(--ink);
  background: var(--bg);
}
a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--ink); font-weight: 500; }
strong { font-weight: 500; }
code {
  font-family: var(--font-m);
  font-size: 0.9em;
  background: #fff;
  border: 1px solid var(--line);
  padding: 0.05em 0.28em;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 0.75rem;
  z-index: 100;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--gutter);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck { border-bottom-color: var(--line); }
.logo {
  font-family: var(--font-d);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.82rem;
}
.site-nav a { color: var(--muted); }
.site-nav a:hover { color: var(--ink); }
.nav-pill {
  color: var(--accent-ink) !important;
  background: var(--accent);
  padding: 0.4rem 0.75rem;
  font-weight: 500;
}
.menu-btn {
  display: none;
  font-family: var(--font-b);
  font-size: 0.8rem;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 0.4rem 0.65rem;
  cursor: pointer;
}
@media (max-width: 640px) {
  .menu-btn { display: inline-flex; }
  .site-nav {
    display: none;
    position: absolute;
    left: var(--gutter);
    right: var(--gutter);
    top: calc(100% + 0.35rem);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.4rem;
    background: #fff;
    border: 1px solid var(--line);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 0.65rem 0.5rem; border-bottom: 1px solid var(--line); }
  .site-nav a:last-child { border-bottom: 0; }
  .nav-pill { text-align: center; }
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 12vh, 7rem) var(--gutter) clamp(3rem, 8vh, 5rem);
}
.logo-hero {
  margin: 0 0 1rem;
  font-family: var(--font-d);
  font-weight: 700;
  font-size: clamp(2.6rem, 9vw, 4rem);
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}
.hero h1 {
  margin: 0 0 0.85rem;
  font-family: var(--font-d);
  font-weight: 600;
  font-size: clamp(1.55rem, 3.5vw, 2.1rem);
  letter-spacing: -0.025em;
  line-height: 1.2;
  max-width: 18ch;
}
.lede {
  margin: 0 0 1.75rem;
  color: var(--muted);
  max-width: 34ch;
}
.hero-rule {
  margin-top: 3rem;
  height: 1px;
  background: var(--ink);
  position: relative;
}
.hero-rule::after {
  content: "";
  position: absolute;
  left: 42%;
  top: -4px;
  width: 48px;
  height: 9px;
  border: 1.5px solid var(--ink);
  background: var(--bg);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-b);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.7rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 2px;
}
.btn.solid {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn.solid:hover { filter: brightness(1.08); }
.btn.line {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn.line:hover { border-color: var(--ink); }

.band {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vh, 4rem) var(--gutter);
  border-top: 1px solid var(--line);
  scroll-margin-top: 4.5rem;
}
.eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}
.band h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-d);
  font-weight: 700;
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 22ch;
}
.band-copy {
  margin: 0;
  color: var(--muted);
  max-width: 52ch;
}
.band-copy-follow {
  margin-top: 1.1rem;
}

.flow-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.75rem;
  margin: 1.75rem 0 0;
  padding: 1rem 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-family: var(--font-d);
  font-weight: 700;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  letter-spacing: -0.03em;
}
.flow-arrow {
  color: var(--muted);
  font-weight: 500;
  font-family: var(--font-m);
  font-size: 0.95rem;
}
.flow-accent {
  color: var(--halt);
  font-weight: 500;
}

.kill-demo {
  margin-top: 1.75rem;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.kill-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  font-size: 0.78rem;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}
.kill-status {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.7rem;
  color: var(--ok);
}
.kill-status.is-killed { color: var(--danger); }
.kill-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.kill-steps li {
  display: grid;
  grid-template-columns: 2.4rem 3rem 1fr;
  gap: 0.65rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.84rem;
  opacity: 0.25;
  transition: opacity 0.25s ease;
}
.kill-steps li:last-child { border-bottom: 0; }
.kill-steps li.is-on { opacity: 1; }
.kill-steps li span:first-child { color: var(--muted); }
.kill-steps li[kill].is-on { color: var(--danger); }

.steps-rail {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.steps-rail li {
  display: grid;
  grid-template-columns: 2.8rem 1fr;
  gap: 0.85rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}
.steps-rail .num {
  font-family: var(--font-d);
  font-weight: 700;
  color: var(--muted);
}
.steps-rail h3 {
  margin: 0 0 0.25rem;
  font-family: var(--font-d);
  font-weight: 700;
  font-size: 1rem;
}
.steps-rail p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.terminal {
  margin: 1.25rem 0 0;
  padding: 1rem 1.1rem;
  background: var(--ink);
  color: #e8e8e4;
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.55;
}
.terminal code {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.docs-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2.5rem, 8vh, 4rem) var(--gutter) 1.5rem;
}
.docs-hero h1 {
  margin: 0 0 0.6rem;
  font-family: var(--font-d);
  font-weight: 600;
  font-size: clamp(1.85rem, 3.5vw, 2.4rem);
  letter-spacing: -0.025em;
}
.docs-layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter) 3.5rem;
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 2rem;
}
.docs-toc {
  position: sticky;
  top: 4.5rem;
  align-self: start;
  font-size: 0.78rem;
}
.docs-toc a {
  display: block;
  padding: 0.3rem 0;
  color: var(--muted);
}
.docs-toc a:hover { color: var(--ink); }
.docs-body h2 {
  margin: 2rem 0 0.65rem;
  font-family: var(--font-d);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  scroll-margin-top: 5rem;
}
.docs-body p, .docs-body li { color: var(--muted); max-width: 48ch; }
@media (max-width: 700px) {
  .docs-layout { grid-template-columns: 1fr; }
  .docs-toc { position: static; display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; }
}

.faq-list {
  margin-top: 1.75rem;
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 0;
  font-family: var(--font-d);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--font-m);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--muted);
  transition: transform 0.2s ease;
}
.faq-item[open] summary::after {
  content: "−";
  color: var(--ink);
}
.faq-item p {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.9rem;
  max-width: 52ch;
  line-height: 1.55;
}
.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.75rem var(--gutter) 2.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}
.footer-links {
  display: flex;
  gap: 1.1rem;
  color: var(--muted);
}
.footer-links a:hover { color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  .kill-steps li { opacity: 1; transition: none; }
  .faq-item summary::after { transition: none; }
}