:root {
  color-scheme: light;
  --paper: #f5f6f8;
  --ink: #1c1c20;
  --muted: #717782;
  --line: #d9dee6;
  --accent: #176c59;
  --soft: #eceff2;
  --card: #ffffff;
  --card-top: #f5f6f8;
  --nav: #ffffff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, sans-serif;
}
#demo, #faq { scroll-margin-top: 104px; }
a { color: var(--accent); text-underline-offset: 4px; }
nav {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: var(--nav);
  font: 13px system-ui, sans-serif;
}
.nav-inner {
  max-width: 1200px;
  margin: auto;
  padding: 20px 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: Inter, system-ui, sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  height: 40px;
  width: auto;
  display: block;
}
.brand-dot { color: var(--accent); }
nav .links { display: flex; gap: 24px; align-items: center; }
nav .links a { text-decoration: none; }
nav .links a.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-weight: 600;
}
nav .links a.nav-cta:hover { background: #12594a; }
main { max-width: 1200px; padding: 40px 52px 56px; margin: auto; }
.eyebrow {
  font: 11px system-ui, sans-serif;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
}
.dot { width: 7px; height: 7px; background: var(--accent); border-radius: 50%; flex-shrink: 0; }
h1 {
  font-weight: 400;
  font-size: clamp(42px, 6vw, 65px);
  letter-spacing: -2.3px;
  line-height: 1.06;
  margin: 22px 0 26px;
}
h1 em { font-style: normal; color: var(--accent); }
.dek { font-size: 22px; line-height: 1.5; color: #3c3c42; }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin: 28px 0 4px;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font: 600 16px system-ui, sans-serif;
  text-decoration: none;
}
.hero-cta:hover { background: #12594a; }
.hero-cta-note { font: 14px/1.5 system-ui, sans-serif; color: var(--muted); }
.byline {
  display: flex;
  gap: 16px;
  font: 12px system-ui, sans-serif;
  color: var(--muted);
  padding: 24px 0 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 36px;
}
p { font-size: 18px; line-height: 1.8; margin: 22px 0; }
code { font-family: inherit; font-style: italic; }
h2 {
  font-size: 30px;
  font-weight: 400;
  letter-spacing: -0.7px;
  line-height: 1.2;
  margin: 48px 0 18px;
}
.definitions {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 26px 0;
  padding: 6px 0;
}
.definition {
  display: grid;
  grid-template-columns: 11.5rem 1fr;
  gap: 16px;
  padding: 16px 0;
  font-size: 16px;
  line-height: 1.55;
}
.definition + .definition { border-top: 1px solid var(--line); }
.definition strong { font: 600 16px/1.7 system-ui, sans-serif; }
.blank { display: inline-block; border-bottom: 1px dashed #8e9b90; width: 115px; }
.demo {
  margin: 14px -14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.demo-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 17px 22px;
  background: var(--card-top);
  font: 12px system-ui, sans-serif;
}
.badge {
  font: 10px system-ui, sans-serif;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}
.tabs { display: flex; gap: 8px; padding: 20px 22px 0; }
button { font: 13px system-ui, sans-serif; cursor: pointer; }
.tabs button {
  flex: 1;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
  padding: 10px;
  border-radius: 6px;
}
.tabs button[aria-selected="true"] {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.demo-body { padding: 25px 25px 30px; }
.demo-body h3 { font: 600 17px system-ui, sans-serif; margin: 0 0 10px; }
.demo-body p { font: 15px/1.65 system-ui, sans-serif; margin: 0; color: var(--muted); }
.embed { max-width: 860px; margin: 18px auto 0; border-radius: 8px; overflow: hidden; background: #000; }
.embed iframe,
.embed video { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; object-fit: cover; }
.embed img { display: block; width: 100%; height: auto; border: 0; }
.diagram {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 23px;
  font: 12px system-ui, sans-serif;
}
.diagram span {
  padding: 17px 12px;
  text-align: center;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  flex: 1;
}
.diagram b { color: #9aa1ad; font-weight: 400; }
figcaption {
  font: 12px/1.6 system-ui, sans-serif;
  color: var(--muted);
  padding: 15px 22px;
  border-top: 1px solid var(--line);
}
.note {
  background: var(--soft);
  border-left: 3px solid var(--accent);
  padding: 22px 25px;
  margin: 30px 0;
}
.note h3 { font: 600 14px system-ui, sans-serif; margin: 0 0 10px; }
.note p { font-size: 17px; line-height: 1.65; margin: 0; }
.placeholder {
  border: 1px dashed #c5cad1;
  border-radius: 8px;
  padding: 28px;
  text-align: center;
  margin: 25px 0;
  color: var(--muted);
  font: 14px/1.6 system-ui, sans-serif;
}
.placeholder small { display: block; margin-top: 7px; font-size: 12px; }
.cta {
  display: inline-flex;
  align-items: center;
  gap: 30px;
  padding: 15px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: 5px;
  font: 14px system-ui, sans-serif;
  text-decoration: none;
  margin: 12px 0;
}
.ai { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 24px; }
.ai h2 { font: 600 13px system-ui, sans-serif; margin: 0; }
.faq h3 {
  font: 600 18px/1.8 system-ui, sans-serif;
  margin: 28px 0 0;
}
.faq p { margin: 0 0 12px; }
.placeholder em { font-style: italic; }
.ai p { font-size: 15px; line-height: 1.7; color: var(--muted); }
.bibtex {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--soft);
}
.bibtex-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  font: 600 12px system-ui, sans-serif;
  color: var(--muted);
}
.bibtex-copy {
  font: 600 12px system-ui, sans-serif;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 12px;
  cursor: pointer;
}
.bibtex-copy:hover { background: var(--card); }
.bibtex pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--ink);
}
footer {
  max-width: 1200px;
  margin: auto;
  padding: 25px 52px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font: 11px system-ui, sans-serif;
}
@media (max-width: 600px) {
  main { padding: 40px 32px; }
  .demo { margin: 30px 0; }
  .definition { grid-template-columns: 1fr; gap: 4px; }
  .nav-inner { padding: 20px 32px; }
  footer { padding: 25px 32px; }
  nav .links { gap: 15px; }
  h1 { letter-spacing: -1.5px; }
  .dek { font-size: 20px; }
  .tabs { gap: 5px; padding: 15px 12px 0; }
  .tabs button { font-size: 11px; padding: 10px 5px; }
  .diagram { gap: 6px; }
  .diagram span { padding: 14px 7px; }
  .byline { flex-wrap: wrap; }
  footer { gap: 20px; }
}