/* =========================================================
   Keystone IAM Docs — design tokens
   ========================================================= */
:root {
  --brand: #2454C7;
  --brand-deep: #16305F;
  --brand-soft: #EAF1FE;
  --brand-light: #4F8CF0;
  --brand-on-soft: var(--brand-deep); /* text color for content sitting on --brand-soft backgrounds */

  --ink: #14161A;
  --ink-2: #565D68;
  --surface-dark: #0F1420; /* fixed dark surface for nav/hero/page-header — does not flip in dark mode, since these always carry white text */
  --clay: #82868F;
  --cream: #FFFFFF;
  --cream-2: #F6F7FB;
  --paper: #FFFFFF;
  --line: #E4E6EE;
  --line-strong: rgba(20, 22, 26, 0.16);

  --font-display: "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;

  --shadow-1: 0 1px 2px rgba(20,22,26,.06), 0 8px 24px rgba(20,22,26,.05);
  --shadow-2: 0 2px 4px rgba(20,22,26,.08), 0 24px 60px rgba(20,22,26,.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
code {
  font-family: var(--font-mono);
  background: var(--cream-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 2px 6px;
  font-size: 0.9em;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 28px;
}

.section-pad { padding: 56px 0 96px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--brand-light);
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-light);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-deep); }

/* =========================================================
   Nav
   ========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--surface-dark);
  color: #fff;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark-img {
  height: 20px;
  width: auto;
  display: inline-block;
}
.logo-divider { width: 1px; height: 18px; background: rgba(255,255,255,.2); }
.logo-label { font-weight: 500; font-size: 13px; color: rgba(255,255,255,.6); letter-spacing: .01em; }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 14.5px; color: rgba(255,255,255,.72); }
.nav-links a:hover, .nav-links a.current { color: #fff; }

.nav-cta { display: flex; align-items: center; gap: 18px; }
.nav-cta .sign-in { font-size: 14px; color: rgba(255,255,255,.72); }
.nav-cta .sign-in:hover { color: #fff; }
.menu-btn {
  display: none;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 6px;
}
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 8px 28px 20px;
  background: var(--surface-dark);
}
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 10px 0; color: rgba(255,255,255,.8); font-size: 15px; }

/* =========================================================
   Footer
   ========================================================= */
.footer { background: var(--cream-2); border-top: 1px solid var(--line); padding: 56px 0 28px; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
}
.footer .tagline { color: var(--clay); font-size: 14px; max-width: 280px; margin-top: 14px; }
.footer h5 { font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color: var(--clay); margin: 0 0 14px; }
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer ul a { font-size: 14px; color: var(--ink-2); }
.footer ul a:hover { color: var(--brand); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--clay);
}
.footer-bottom a:hover { color: var(--brand); }

/* =========================================================
   Hero (homepage)
   ========================================================= */
.hero { background: var(--surface-dark); padding: 120px 0 100px; }
.hero .inner { max-width: 680px; }
.hero h1 { color: #fff; font-size: clamp(36px, 5vw, 58px); line-height: 1.05; margin: 18px 0 20px; }
.hero h1 em { color: var(--brand-light); font-style: normal; }
.hero .lead { color: rgba(255,255,255,.7); font-size: 18px; margin-bottom: 32px; }

/* =========================================================
   Page header (docs chapter / index)
   ========================================================= */
.page-header { background: var(--surface-dark); padding: 64px 0 76px; position: relative; overflow: hidden; }
.page-header::before {
  content: "";
  position: absolute;
  right: -120px; top: -120px;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,140,240,.25), transparent 70%);
}
.page-header .inner { position: relative; max-width: 720px; }
.page-header h1 { color: #fff; font-size: clamp(32px, 4vw, 46px); line-height: 1.08; margin: 14px 0 16px; }
.page-header h1 em { color: var(--brand-light); font-style: normal; }
.page-header p.lead { color: rgba(255,255,255,.68); font-size: 17px; max-width: 600px; }

.crumb { font-size: 13px; color: rgba(255,255,255,.55); margin-bottom: 22px; position: relative; }
.crumb a { color: rgba(255,255,255,.6); }
.crumb a:hover { color: #fff; }
.crumb .sep { margin: 0 8px; color: rgba(255,255,255,.25); }

/* =========================================================
   Docs layout — sidebar + main + pager
   ========================================================= */
.docs-body { background: var(--cream); }
.docs-layout {
  display: grid;
  grid-template-columns: 220px 1fr 220px;
  gap: 48px;
  align-items: start;
}

.docs-side { position: sticky; top: 88px; }
.docs-side h5 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--clay);
  margin: 0 0 14px;
}
.chapter-list { list-style: none; counter-reset: chapter; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 2px; }
.chapter-list li { counter-increment: chapter; }
.chapter-list a {
  display: block;
  font-size: 14px;
  color: var(--ink-2);
  padding: 8px 10px;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
}
.chapter-list a::before {
  content: counter(chapter) ". ";
  color: var(--clay);
}
.chapter-list a:hover { color: var(--ink); background: var(--cream-2); }
.chapter-list a.active {
  color: var(--brand);
  background: var(--brand-soft);
  border-left-color: var(--brand);
  font-weight: 600;
}

.docs-main { min-width: 0; }

.on-this-page { position: sticky; top: 88px; }
.on-this-page h5 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--clay);
  margin: 0 0 14px;
}
.on-this-page ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 2px; }
.on-this-page a {
  display: block;
  font-size: 13.5px;
  color: var(--ink-2);
  padding: 6px 0 6px 12px;
  border-left: 2px solid var(--line);
}
.on-this-page a:hover { color: var(--ink); }
.on-this-page a.active {
  color: var(--brand);
  border-left-color: var(--brand);
  font-weight: 600;
}

.docs-fragment { margin-bottom: 52px; scroll-margin-top: 90px; }
.docs-fragment:last-of-type { margin-bottom: 40px; }
.docs-fragment h2 { font-size: 26px; margin: 0 0 14px; }
.docs-fragment h3 { font-size: 18px; margin: 28px 0 8px; }
.docs-fragment p { color: var(--ink-2); margin: 0 0 14px; }
.docs-fragment ul, .docs-fragment ol { color: var(--ink-2); padding-left: 22px; margin: 0 0 14px; }
.docs-fragment li { margin-bottom: 6px; }
.docs-fragment li strong { color: var(--ink); }
.docs-fragment a { color: var(--brand); font-weight: 500; }
.docs-fragment a:hover { text-decoration: underline; }
.docs-fragment blockquote {
  margin: 20px 0;
  padding: 14px 20px;
  background: var(--brand-soft);
  border-left: 3px solid var(--brand);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--brand-on-soft);
  font-size: 14.5px;
}
.docs-fragment blockquote p:last-child { margin-bottom: 0; }
.docs-fragment dl { margin: 0 0 14px; }
.docs-fragment dt { font-weight: 600; margin-top: 12px; }
.docs-fragment dd { color: var(--ink-2); margin: 4px 0 0; }

.docs-pager {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: 28px;
  margin-top: 20px;
}
.pager-spacer { flex: 1; }
.pager-link {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  max-width: 320px;
}
.pager-link:hover { border-color: var(--brand); background: var(--brand-soft); }
.pager-link.next { text-align: right; margin-left: auto; }
.pager-dir { font-size: 12px; color: var(--clay); text-transform: uppercase; letter-spacing: .04em; }
.pager-title { font-size: 15px; font-weight: 600; color: var(--ink); }

/* =========================================================
   Guide grid (docs landing page)
   ========================================================= */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.guide {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  transition: transform .15s ease, border-color .15s ease;
}
.guide:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.guide .tag {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--brand);
  margin: 0;
}
.guide h3 { font-size: 20px; margin: 0; }
.guide p { color: var(--ink-2); font-size: 14.5px; margin: 0; flex: 1; }
.guide .read { font-size: 13.5px; font-weight: 600; color: var(--brand-on-soft); }

/* =========================================================
   Reveal-on-scroll
   ========================================================= */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1180px) {
  .docs-layout { grid-template-columns: 220px 1fr; }
  .on-this-page { display: none; }
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .menu-btn { display: inline-flex; }
  .footer-inner { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-side { position: static; }
  .guide-grid { grid-template-columns: 1fr; }
  .docs-pager { flex-direction: column; }
  .pager-link.next { margin-left: 0; text-align: left; }
}

/* =========================================================
   Dark mode
   ========================================================= */
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #F2F3F7;
    --ink-2: #A7ADBA;
    --clay: #7C828E;
    --cream: #0E0F13;
    --cream-2: #16181E;
    --paper: #16181E;
    --line: #262A33;
    --line-strong: rgba(242,243,247,.18);
    --brand-soft: rgba(79,140,240,.12);
    --brand-on-soft: var(--brand-light);
  }
  .pager-link, .guide { background: var(--cream-2); }
  code { background: var(--cream-2); }
}