/* ============================================================
   Karna docs — shared stylesheet
   Design tokens and chrome inherited from the karna.sicuranext.com
   landing page; docs-specific layout (sticky sidebar + content)
   added below.
   ============================================================ */
:root {
  --ink:        #1D1D1B;
  --ink-soft:   #2A2A29;
  --ink-deep:   #121211;
  --paper:      #F7F2EE;
  --lotion:     #FFFCFA;
  --sunken:     #EFE9E4;
  --olive:      #70942A;
  --olive-hover:#5E7F22;
  --inchworm:   #BAE95C;
  --gold:       #D9A441;
  --gold-soft:  #E6BE6B;
  --gold-deep:  #A8761E;
  --red:        #C4452B;

  --fg-1:       var(--ink);
  --fg-2:       #3D3D3B;
  --fg-3:       rgba(29,29,27,0.62);
  --fg-4:       rgba(29,29,27,0.40);

  --border-1:   rgba(29,29,27,0.10);
  --border-2:   rgba(29,29,27,0.18);

  --font-sans:  "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-mono:  "Geist Mono", "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --ease-out:   cubic-bezier(0.2, 0.6, 0.2, 1);

  --nav-h:      61px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--fg-1);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--inchworm); color: var(--ink); }
a { color: inherit; text-decoration: none; }
code, pre, .mono { font-family: var(--font-mono); }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ============================================================ NAV (reused) */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247,242,238,0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-1);
}
.nav-inner {
  display: flex; align-items: center; gap: 32px;
  padding: 14px 32px;
  max-width: 1200px; margin: 0 auto;
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-word { font-weight: 600; font-size: 22px; letter-spacing: -0.04em; color: var(--ink); }
.brand-by {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em;
  color: var(--fg-3); text-transform: uppercase; margin-left: 10px; padding-left: 10px;
  border-left: 1px solid var(--border-1); line-height: 1;
  display: inline-flex; align-items: center; gap: 7px;
}
.brand-by-logo { height: 28px; width: auto; display: block; }
.nav-links { display: flex; gap: 26px; margin-left: 16px; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--fg-2);
  padding: 6px 2px; border-bottom: 2px solid transparent;
  transition: color 120ms var(--ease-out), border-color 120ms var(--ease-out);
}
.nav-links a:hover { color: var(--ink); border-bottom-color: var(--olive); }
.nav-links a.active { color: var(--ink); border-bottom-color: var(--gold); }
.nav-cta { margin-left: auto; display: flex; gap: 10px; align-items: center; }

/* ============================================================ BUTTONS (reused) */
.btn {
  font-family: var(--font-sans); font-size: 14px; font-weight: 500;
  padding: 10px 18px; border-radius: 8px; border: 1px solid transparent;
  cursor: pointer; display: inline-flex; align-items: center; gap: 8px;
  transition: background 140ms var(--ease-out), color 140ms var(--ease-out), border-color 140ms var(--ease-out);
  text-decoration: none; white-space: nowrap;
}
.btn-lg { font-size: 15px; padding: 14px 22px; border-radius: 10px; }
.btn-primary { background: var(--ink); color: var(--lotion); }
.btn-primary:hover { background: #000; }
.btn-secondary { background: var(--lotion); color: var(--ink); border-color: var(--border-2); }
.btn-secondary:hover { background: var(--paper); border-color: var(--ink); }
.btn-gold { background: var(--gold); color: var(--ink); }
.btn-gold:hover { background: var(--gold-soft); }

/* ============================================================ DOCS PAGE HEADER */
.doc-head {
  background: var(--ink); color: var(--lotion);
  border-bottom: 1px solid #000; position: relative; overflow: hidden;
}
.doc-head::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(circle at 88% 30%, rgba(217,164,65,0.16), transparent 50%);
}
.doc-head-inner { position: relative; max-width: 1200px; margin: 0 auto; padding: 54px 32px 46px; }
.doc-eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  color: var(--gold); text-transform: uppercase; display: inline-flex; gap: 8px; align-items: center;
}
.doc-eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--gold); }
.doc-head h1 {
  font-weight: 600; font-size: clamp(32px, 4vw, 46px); line-height: 1.06;
  letter-spacing: -0.022em; margin: 14px 0 14px; color: var(--lotion); text-wrap: balance;
}
.doc-head p { margin: 0; font-size: 18px; color: rgba(255,252,250,0.74); max-width: 720px; line-height: 1.55; }
.doc-crumbs { font-family: var(--font-mono); font-size: 12px; color: rgba(255,252,250,0.50); margin-bottom: 6px; }
.doc-crumbs a:hover { color: var(--gold); }

/* ============================================================ DOCS LAYOUT */
.doc-layout {
  max-width: 1200px; margin: 0 auto; padding: 0 32px;
  display: grid; grid-template-columns: 248px 1fr; gap: 56px;
  align-items: start;
}
.doc-side { position: sticky; top: var(--nav-h); align-self: start; padding: 40px 0 60px; max-height: calc(100vh - var(--nav-h)); overflow-y: auto; }
.doc-side h5 {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-3); margin: 22px 0 8px; font-weight: 500;
}
.doc-side h5:first-child { margin-top: 0; }
.doc-side a {
  display: block; font-size: 13.5px; color: var(--fg-2); padding: 5px 12px;
  border-left: 2px solid transparent; line-height: 1.4;
  transition: color 120ms var(--ease-out), border-color 120ms var(--ease-out), background 120ms var(--ease-out);
}
.doc-side a:hover { color: var(--ink); background: rgba(29,29,27,0.04); }
.doc-side a.active { color: var(--ink); border-left-color: var(--gold); font-weight: 500; }

.doc-main { padding: 40px 0 96px; min-width: 0; max-width: 820px; }
.doc-main section { padding: 0; margin: 0 0 52px; scroll-margin-top: calc(var(--nav-h) + 18px); }
.doc-main h2 {
  font-size: 27px; font-weight: 600; letter-spacing: -0.018em; color: var(--ink);
  margin: 0 0 14px; padding-bottom: 12px; border-bottom: 1px solid var(--border-1); text-wrap: balance;
}
.doc-main h3 { font-size: 18px; font-weight: 600; color: var(--ink); margin: 32px 0 10px; letter-spacing: -0.01em; }
.doc-main h4 { font-size: 15px; font-weight: 600; color: var(--ink); margin: 24px 0 8px; }
.doc-main p { margin: 0 0 14px; font-size: 15.5px; color: var(--fg-2); }
.doc-main ul, .doc-main ol { margin: 0 0 16px; padding-left: 22px; }
.doc-main li { font-size: 15.5px; color: var(--fg-2); margin: 5px 0; line-height: 1.55; }
.doc-main a.link { color: var(--olive); border-bottom: 1px solid rgba(112,148,42,0.35); }
.doc-main a.link:hover { border-bottom-color: var(--olive); }
.doc-main strong { color: var(--ink); font-weight: 600; }

/* inline code */
.doc-main :not(pre) > code {
  background: var(--sunken); padding: 1.5px 6px; border-radius: 4px;
  font-size: 13px; color: var(--ink-soft);
}

/* anchor link on headings */
.anchor { color: var(--fg-4); margin-left: 8px; font-weight: 400; opacity: 0; transition: opacity 120ms; font-size: 0.8em; }
h2:hover .anchor, h3:hover .anchor { opacity: 1; }

/* ============================================================ CODE BLOCK (reused, dark) */
.code-card {
  background: var(--ink); color: var(--lotion);
  border-radius: 12px; overflow: hidden; border: 1px solid #000;
  box-shadow: 0 12px 32px rgba(29,29,27,0.08); margin: 0 0 18px;
}
.code-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: #161614; border-bottom: 1px solid rgba(255,252,250,0.08);
  padding: 10px 16px; font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.10em; text-transform: uppercase; color: rgba(255,252,250,0.55);
}
.code-head > :first-child { margin-right: auto; }
.code-head .lang { color: var(--gold); }

/* Copy-to-clipboard button, injected into each .code-head by docs.js. */
.copy-btn {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.10em;
  text-transform: uppercase; color: rgba(255,252,250,0.55);
  background: rgba(255,252,250,0.06); border: 1px solid rgba(255,252,250,0.14);
  border-radius: 6px; padding: 4px 9px; cursor: pointer; line-height: 1;
  flex: none; -webkit-appearance: none; appearance: none;
  transition: color 120ms var(--ease-out), background 120ms var(--ease-out), border-color 120ms var(--ease-out);
}
.copy-btn:hover { color: var(--lotion); background: rgba(255,252,250,0.12); border-color: rgba(255,252,250,0.24); }
.copy-btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.copy-btn.copied { color: var(--inchworm); border-color: rgba(154,205,50,0.45); background: rgba(154,205,50,0.10); }
/* Fallback when a card has no .code-head: float the button over the card. */
.copy-btn.copy-btn-float { position: absolute; top: 10px; right: 12px; z-index: 2; }
.code-body { padding: 18px 22px 20px; font-family: var(--font-mono); font-size: 13px; line-height: 1.65; overflow-x: auto; }
.code-body pre { margin: 0; color: rgba(255,252,250,0.92); white-space: pre; }
.code-body .cmt { color: rgba(255,252,250,0.42); }
.code-body .prm { color: var(--gold); }
.code-body .kw  { color: var(--inchworm); }
.code-body .str { color: #E8C385; }
.code-body .num { color: #BAE95C; }

/* ============================================================ REFERENCE TABLE (light) */
.doc-table {
  width: 100%; border-collapse: collapse; margin: 4px 0 22px; font-size: 14px;
  background: var(--lotion); border: 1px solid var(--border-1); border-radius: 12px; overflow: hidden;
}
.doc-table th, .doc-table td {
  padding: 11px 14px; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--border-1);
}
.doc-table thead th {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--fg-3); font-weight: 500; background: var(--sunken);
}
.doc-table tbody tr:last-child td { border-bottom: none; }
.doc-table td.name, .doc-table td.mono, .doc-table th.mono { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-soft); white-space: nowrap; }
.doc-table td.name code { background: none; padding: 0; color: var(--gold-deep); font-weight: 500; }
.doc-table td p { margin: 0 0 6px; font-size: 13.5px; }
.doc-table td p:last-child { margin-bottom: 0; }

/* type / default badges */
.badge {
  display: inline-block; font-family: var(--font-mono); font-size: 11px;
  padding: 1px 7px; border-radius: 5px; letter-spacing: 0.02em; white-space: nowrap;
}
.badge-type { background: rgba(112,148,42,0.12); color: var(--olive-hover); }
.badge-def  { background: var(--sunken); color: var(--fg-2); }
.badge-gate { background: rgba(217,164,65,0.16); color: var(--gold-deep); }

/* ============================================================ CALLOUTS */
.note, .warn, .tip {
  border: 1px solid var(--border-1); border-left-width: 3px; border-radius: 8px;
  padding: 14px 16px; margin: 0 0 18px; font-size: 14.5px; color: var(--fg-2); background: var(--lotion);
}
.note  { border-left-color: var(--olive); }
.tip   { border-left-color: var(--gold); }
.warn  { border-left-color: var(--red); }
.note .lbl, .warn .lbl, .tip .lbl {
  display: block; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.10em;
  text-transform: uppercase; margin-bottom: 6px; font-weight: 500;
}
.note .lbl { color: var(--olive); }
.tip .lbl  { color: var(--gold-deep); }
.warn .lbl { color: var(--red); }
.note code, .warn code, .tip code { background: var(--sunken); padding: 1px 5px; border-radius: 4px; font-size: 12.5px; }

/* ============================================================ DOC CARDS (home) */
.doc-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 28px 0 8px; }
.doc-card {
  background: var(--lotion); border: 1px solid var(--border-1); border-radius: 12px;
  padding: 26px 26px 24px; display: flex; flex-direction: column; gap: 8px;
  transition: border-color 160ms var(--ease-out), transform 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}
.doc-card:hover { border-color: var(--ink); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(29,29,27,0.06); }
.doc-card h3 { margin: 0; font-size: 18px; font-weight: 600; color: var(--ink); }
.doc-card p { margin: 0; font-size: 14px; color: var(--fg-2); }
.doc-card .go { margin-top: 6px; font-family: var(--font-mono); font-size: 12px; color: var(--olive); letter-spacing: 0.04em; }

/* ============================================================ FOOTER (reused) */
footer.foot {
  background: var(--ink); color: rgba(255,252,250,0.62);
  padding: 56px 32px 36px; border-top: 1px solid #000;
}
.foot-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 48px; }
.foot h5 {
  color: rgba(255,252,250,0.42); font-size: 11px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; margin: 0 0 14px; font-family: var(--font-mono);
}
.foot a { display: block; color: rgba(255,252,250,0.78); font-size: 14px; padding: 4px 0; transition: color 120ms var(--ease-out); }
.foot a:hover { color: var(--gold); }
.foot p { margin: 12px 0 0; font-size: 13.5px; color: rgba(255,252,250,0.55); line-height: 1.55; max-width: 320px; }
.foot-brand-row { display: flex; align-items: center; gap: 12px; }
.foot-brand-row .word { font-size: 24px; font-weight: 600; letter-spacing: -0.04em; color: var(--lotion); }
.foot-bottom {
  max-width: 1200px; margin: 40px auto 0; padding-top: 24px;
  border-top: 1px solid rgba(255,252,250,0.08);
  display: flex; justify-content: space-between; align-items: center; gap: 24px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em;
  color: rgba(255,252,250,0.40); text-transform: uppercase;
}
.foot-bottom a:hover { color: var(--gold); }
.foot-logo { height: 22px; width: auto; display: block; opacity: 0.85; transition: opacity 140ms var(--ease-out); }
.foot-logo:hover { opacity: 1; }

/* ============================================================ RESPONSIVE */
@media (max-width: 960px) {
  .nav-links { display: none; }
  .doc-layout { grid-template-columns: 1fr; gap: 0; }
  .doc-side {
    position: static; max-height: none; overflow: visible;
    padding: 20px 0; border-bottom: 1px solid var(--border-1); margin-bottom: 10px;
  }
  .doc-main { padding: 24px 0 64px; }
  .doc-cards { grid-template-columns: 1fr; }
  .foot-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .wrap { padding: 0 24px; }
  .doc-layout { padding: 0 24px; }
}
@media (max-width: 560px) {
  .foot-inner { grid-template-columns: 1fr; }
  .foot-bottom { flex-direction: column; align-items: flex-start; }
  .nav-cta .btn-secondary { display: none; }
  .brand-by { display: none; }
}