/* OpenApiFeatureFlags website. Solarized dark palette, matching the project mark.
   Hand-rolled, no frameworks, no external requests. */

:root {
  --bg: #002b36;
  --bg-elev: #073642;
  --bg-code: #00212b;
  --border: rgba(147, 161, 161, 0.18);
  --border-strong: rgba(147, 161, 161, 0.34);
  --text: #93a1a1;
  --text-dim: #657b83;
  --text-faint: #586e75;
  --text-strong: #eee8d5;
  --accent: #2aa198;
  --accent-bright: #35b5ac;
  --yellow: #b58900;
  --blue: #268bd2;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 10px;
  --container: 1040px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

::selection { background: rgba(42, 161, 152, 0.35); color: var(--text-strong); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-strong);
  font-weight: 650;
  font-size: 1.02rem;
}
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; border-radius: 6px; display: block; }
.nav { display: flex; align-items: center; gap: 22px; font-size: 0.95rem; }
.nav a { color: var(--text); }
.nav a:hover { color: var(--text-strong); text-decoration: none; }
.nav a.nav-github { color: var(--text-strong); font-weight: 550; }
@media (max-width: 760px) {
  .nav a:not(.nav-docs):not(.nav-github) { display: none; }
  .nav { gap: 16px; }
}

/* Hero */
.hero { padding: 80px 0 60px; text-align: center; }
.hero .mark {
  width: 88px;
  height: 88px;
  border-radius: 18px;
  box-shadow: 0 0 0 1px var(--border-strong), 0 14px 36px rgba(0, 0, 0, 0.35);
}
.hero h1 {
  margin: 26px 0 4px;
  font-size: clamp(2.1rem, 5vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text-strong);
}
.hero .tagline {
  margin: 0 auto 16px;
  font-size: clamp(1.08rem, 2.4vw, 1.3rem);
  color: var(--text-strong);
  font-weight: 450;
}
.hero .lede { max-width: 660px; margin: 0 auto 30px; }
.hero .lede code, .section code.inline { color: var(--text-strong); white-space: nowrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 8px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.97rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #002129; }
.btn-primary:hover { background: var(--accent-bright); }
.btn-secondary { border-color: var(--border-strong); color: var(--text-strong); }
.btn-secondary:hover { border-color: var(--accent); }
.hero .actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }

.install {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-code);
  margin-bottom: 30px;
  max-width: 100%;
}
.install code {
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text-strong);
  white-space: nowrap;
  overflow-x: auto;
}
.install code .prompt { color: var(--text-dim); user-select: none; }
.install button {
  border: none;
  border-left: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text);
  padding: 10px 14px;
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
  white-space: nowrap;
}
.install button:hover { color: var(--text-strong); }
@media (max-width: 560px) {
  .install code { white-space: normal; word-break: break-all; }
}

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.82rem;
}
.stats a { color: var(--text-dim); }
.stats a:hover { color: var(--accent); }

/* Sections */
.section { padding: 66px 0; border-top: 1px solid var(--border); }
.section-head { margin-bottom: 34px; }
.section-head.center { text-align: center; }
.section-head h2 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  letter-spacing: -0.015em;
  color: var(--text-strong);
}
.section-head p { margin: 0; max-width: 680px; }
.section-head.center p { margin: 0 auto; }

/* Demo */
.demo-frame {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elev);
}
.demo-frame img { display: block; width: 100%; height: auto; }
.demo-caption {
  margin: 14px 0 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.92rem;
}

/* Quickstart */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.tabs [role="tab"] {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: 10px 14px;
  font: inherit;
  font-size: 0.93rem;
  color: var(--text);
  cursor: pointer;
}
.tabs [role="tab"]:hover { color: var(--text-strong); }
.tabs [role="tab"][aria-selected="true"] {
  color: var(--text-strong);
  border-bottom-color: var(--accent);
  font-weight: 600;
}
.tabpanel[hidden] { display: none; }
.engine-note { color: var(--text-dim); font-size: 0.9rem; margin: 10px 0 0; }

pre {
  margin: 0 0 16px;
  padding: 15px 17px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--text);
}
pre .c { color: var(--text-faint); }
pre .s { color: var(--yellow); }
pre .hl { color: var(--accent); }
pre .n { color: var(--blue); }

.qs-sub { margin: 30px 0 12px; font-size: 1.08rem; color: var(--text-strong); }
.qs-note { color: var(--text-dim); font-size: 0.92rem; margin: 0 0 14px; }

/* Feature cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 920px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--text-strong);
}
.card p { margin: 0; font-size: 0.93rem; }
.card a { color: var(--accent); }

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; }
.faq-item { border-top: 1px solid var(--border); padding: 20px 0; }
.faq-item:first-child { border-top: none; padding-top: 0; }
.faq-item h3 {
  margin: 0 0 6px;
  font-size: 1.03rem;
  color: var(--text-strong);
}
.faq-item p { margin: 0; font-size: 0.95rem; }
.faq-item code { color: var(--text-strong); font-size: 0.88rem; white-space: nowrap; }

/* Docs */
.docs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 28px;
}
@media (max-width: 760px) { .docs-grid { grid-template-columns: 1fr; } }
.docs-grid a.doc-link {
  color: var(--text-strong);
  font-weight: 600;
  font-size: 0.97rem;
}
.docs-grid .desc { color: var(--text-dim); font-size: 0.9rem; display: block; margin-top: 2px; }
.docs-item { padding: 10px 0; border-top: 1px solid var(--border); }
.docs-grid .docs-item:nth-child(-n+2) { border-top: none; padding-top: 0; }
@media (max-width: 760px) { .docs-grid .docs-item:nth-child(2) { border-top: 1px solid var(--border); padding-top: 10px; } }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 34px 0 46px;
  font-size: 0.9rem;
  color: var(--text-dim);
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  align-items: center;
  justify-content: space-between;
}
.site-footer .foot-brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.site-footer .foot-brand img { width: 22px; height: 22px; border-radius: 5px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer nav a { color: var(--text-dim); }
.site-footer nav a:hover { color: var(--accent); }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #002129;
  padding: 8px 14px;
  border-radius: 0 0 8px 0;
  z-index: 40;
  font-weight: 600;
}
.skip:focus { left: 0; }

.colophon {
  flex-basis: 100%;
  margin: 6px 0 0;
  color: var(--text-faint);
  font-size: 0.84rem;
}