/* =============================================================
   SeeKi Docs — shared stylesheet
   Palette in OKLCH, neutrals tinted toward ink-navy hue (~240).
   Light theme default; [data-theme="dark"] on <html> for dark.
   ============================================================= */

/* ---------- Fonts (self-hosted) ---------- */

@font-face {
  font-family: "Hanken Grotesk";
  src: url("../fonts/hanken-grotesk.woff2") format("woff2-variations"),
       url("../fonts/hanken-grotesk.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Commit Mono";
  src: url("../fonts/commit-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Commit Mono";
  src: url("../fonts/commit-mono-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ---------- Tokens: light theme (default) ---------- */

:root {
  /* Surfaces — cream, tinted toward ink-navy (hue 240) */
  --sk-bg:              oklch(97% 0.012 240);
  --sk-surface:         oklch(98.5% 0.010 240);
  --sk-surface-raised:  oklch(100% 0 0);
  --sk-chrome:          oklch(98% 0.012 240 / 0.72);

  /* Ink */
  --sk-ink:         oklch(30% 0.040 240);
  --sk-ink-muted:   oklch(45% 0.030 240);
  --sk-ink-subtle:  oklch(60% 0.020 240);

  /* Borders */
  --sk-border:         oklch(90% 0.014 240);
  --sk-border-strong:  oklch(82% 0.020 240);

  /* Accent — warm orange, used sparingly */
  --sk-accent:       oklch(72% 0.175 55);
  --sk-accent-ink:   oklch(35% 0.120 55);
  --sk-accent-soft:  oklch(94% 0.045 55);

  /* Semantics */
  --sk-yes:      oklch(60% 0.130 150);
  --sk-yes-soft: oklch(94% 0.040 150);
  --sk-no:       oklch(58% 0.170 25);
  --sk-no-soft:  oklch(94% 0.045 25);
  --sk-warn:     oklch(72% 0.150 85);
  --sk-warn-soft:oklch(95% 0.050 85);

  /* Hatched NULL pattern */
  --sk-hatch: repeating-linear-gradient(
    135deg,
    transparent 0 4px,
    oklch(70% 0.020 240 / 0.30) 4px 5px
  );

  /* Typography */
  --sk-font-ui:   "Hanken Grotesk", ui-sans-serif, system-ui, -apple-system,
                  "Segoe UI", Roboto, sans-serif;
  --sk-font-mono: "Commit Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --sk-fs-xs:  0.78rem;
  --sk-fs-sm:  0.875rem;
  --sk-fs-md:  1rem;
  --sk-fs-lg:  1.125rem;
  --sk-fs-xl:  1.375rem;
  --sk-fs-2xl: 1.75rem;
  --sk-fs-3xl: 2.25rem;

  --sk-lh-tight: 1.2;
  --sk-lh-body:  1.6;

  /* Spacing scale (4px base) */
  --sk-space-1: 0.25rem;
  --sk-space-2: 0.5rem;
  --sk-space-3: 0.75rem;
  --sk-space-4: 1rem;
  --sk-space-5: 1.5rem;
  --sk-space-6: 2rem;
  --sk-space-7: 3rem;
  --sk-space-8: 4rem;

  /* Radii & chrome */
  --sk-radius-sm: 4px;
  --sk-radius:    8px;
  --sk-radius-lg: 12px;

  --sk-shadow-chrome: 0 1px 0 oklch(85% 0.015 240 / 0.6),
                      0 8px 24px -12px oklch(30% 0.040 240 / 0.18);

  /* Layout */
  --sk-sidebar-w: 17rem;
  --sk-topbar-h:  3.25rem;
  --sk-prose-w:   72ch;
}

/* ---------- Tokens: dark theme ---------- */

[data-theme="dark"] {
  --sk-bg:              oklch(22% 0.022 240);
  --sk-surface:         oklch(25% 0.022 240);
  --sk-surface-raised:  oklch(28% 0.024 240);
  --sk-chrome:          oklch(24% 0.022 240 / 0.72);

  --sk-ink:         oklch(92% 0.015 240);
  --sk-ink-muted:   oklch(78% 0.020 240);
  --sk-ink-subtle:  oklch(62% 0.020 240);

  --sk-border:         oklch(32% 0.025 240);
  --sk-border-strong:  oklch(40% 0.030 240);

  --sk-accent:       oklch(74% 0.130 55);
  --sk-accent-ink:   oklch(88% 0.110 55);
  --sk-accent-soft:  oklch(34% 0.060 55);

  --sk-yes:      oklch(72% 0.130 150);
  --sk-yes-soft: oklch(32% 0.050 150);
  --sk-no:       oklch(70% 0.150 25);
  --sk-no-soft:  oklch(32% 0.055 25);
  --sk-warn:     oklch(80% 0.130 85);
  --sk-warn-soft:oklch(34% 0.050 85);

  --sk-hatch: repeating-linear-gradient(
    135deg,
    transparent 0 4px,
    oklch(60% 0.020 240 / 0.30) 4px 5px
  );

  --sk-shadow-chrome: 0 1px 0 oklch(35% 0.025 240 / 0.7),
                      0 10px 28px -14px oklch(0% 0 0 / 0.45);
}

/* Respect system preference when user hasn't toggled */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sk-bg:              oklch(22% 0.022 240);
    --sk-surface:         oklch(25% 0.022 240);
    --sk-surface-raised:  oklch(28% 0.024 240);
    --sk-chrome:          oklch(24% 0.022 240 / 0.72);
    --sk-ink:             oklch(92% 0.015 240);
    --sk-ink-muted:       oklch(78% 0.020 240);
    --sk-ink-subtle:      oklch(62% 0.020 240);
    --sk-border:          oklch(32% 0.025 240);
    --sk-border-strong:   oklch(40% 0.030 240);
    --sk-accent:          oklch(74% 0.130 55);
    --sk-accent-ink:      oklch(88% 0.110 55);
    --sk-accent-soft:     oklch(34% 0.060 55);
    --sk-yes:             oklch(72% 0.130 150);
    --sk-yes-soft:        oklch(32% 0.050 150);
    --sk-no:              oklch(70% 0.150 25);
    --sk-no-soft:         oklch(32% 0.055 25);
    --sk-hatch: repeating-linear-gradient(
      135deg, transparent 0 4px,
      oklch(60% 0.020 240 / 0.30) 4px 5px);
    --sk-shadow-chrome: 0 1px 0 oklch(35% 0.025 240 / 0.7),
                        0 10px 28px -14px oklch(0% 0 0 / 0.45);
  }
}

/* ---------- Base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

html {
  background: var(--sk-bg);
  color: var(--sk-ink);
  font-family: var(--sk-font-ui);
  font-size: 16px;
  line-height: var(--sk-lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 0% -10%,
      oklch(from var(--sk-bg) calc(l + 0.015) c h) 0%, transparent 60%),
    var(--sk-bg);
}

::selection {
  background: var(--sk-accent-soft);
  color: var(--sk-accent-ink);
}

a {
  color: var(--sk-accent-ink);
  text-decoration-color: oklch(from var(--sk-accent) l c h / 0.45);
  text-underline-offset: 2px;
}
a:hover { text-decoration-color: var(--sk-accent); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--sk-accent);
  outline-offset: 2px;
  border-radius: var(--sk-radius-sm);
}

/* ---------- Shell ---------- */

.sk-shell {
  display: grid;
  grid-template-columns: var(--sk-sidebar-w) minmax(0, 1fr);
  grid-template-rows: var(--sk-topbar-h) 1fr auto;
  grid-template-areas:
    "topbar  topbar"
    "sidebar content"
    "footer  footer";
  min-height: 100vh;
}

/* Glass utility — used only on top-level chrome (topbar, sidebar) */
.sk-glass {
  background: var(--sk-chrome);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
}

.sk-topbar {
  grid-area: topbar;
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: var(--sk-space-4);
  padding: 0 var(--sk-space-5);
  background: var(--sk-chrome);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--sk-border);
  box-shadow: var(--sk-shadow-chrome);
}

.sk-sidebar {
  grid-area: sidebar;
  position: sticky; top: var(--sk-topbar-h);
  align-self: start;
  height: calc(100vh - var(--sk-topbar-h));
  overflow-y: auto;
  padding: var(--sk-space-5) var(--sk-space-4);
  background: var(--sk-chrome);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-right: 1px solid var(--sk-border);
}

.sk-sidebar__section {
  margin-bottom: var(--sk-space-5);
}
.sk-sidebar__section-title {
  margin: 0 0 var(--sk-space-2);
  padding: 0 var(--sk-space-2);
  font-size: var(--sk-fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sk-ink-subtle);
}
.sk-sidebar__link {
  display: block;
  padding: 0.35rem var(--sk-space-2);
  margin: 0.1rem 0;
  border-radius: var(--sk-radius-sm);
  color: var(--sk-ink-muted);
  font-size: var(--sk-fs-sm);
  text-decoration: none;
  border-left: 2px solid transparent;
}
.sk-sidebar__link:hover {
  color: var(--sk-ink);
  background: oklch(from var(--sk-surface) calc(l - 0.02) c h / 0.6);
}
.sk-sidebar__link--active {
  color: var(--sk-accent-ink);
  background: var(--sk-accent-soft);
  border-left-color: var(--sk-accent);
  font-weight: 600;
}

.sk-content {
  grid-area: content;
  padding: var(--sk-space-7) var(--sk-space-6);
  min-width: 0;
}

/* ---------- Brand ---------- */

.sk-brand {
  display: inline-flex; align-items: center; gap: var(--sk-space-2);
  color: var(--sk-ink);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.sk-brand__mark { height: 1.5rem; width: 1.5rem; }
.sk-brand__word { height: 1.1rem; }

/* ---------- Theme toggle ---------- */

.sk-theme-toggle {
  appearance: none;
  background: transparent;
  border: 1px solid var(--sk-border);
  color: var(--sk-ink-muted);
  border-radius: var(--sk-radius-sm);
  padding: 0.3rem 0.55rem;
  font: inherit;
  font-size: var(--sk-fs-sm);
  cursor: pointer;
}
.sk-theme-toggle:hover {
  color: var(--sk-ink);
  border-color: var(--sk-border-strong);
  background: var(--sk-surface);
}

/* ---------- Prose (markdown content) ---------- */

.sk-prose {
  max-width: var(--sk-prose-w);
  color: var(--sk-ink);
  font-size: var(--sk-fs-md);
  line-height: var(--sk-lh-body);
}

.sk-prose > * + * { margin-top: var(--sk-space-4); }

.sk-prose h1, .sk-prose h2, .sk-prose h3, .sk-prose h4 {
  line-height: var(--sk-lh-tight);
  letter-spacing: -0.015em;
  color: var(--sk-ink);
  font-weight: 600;
}
.sk-prose h1 { font-size: var(--sk-fs-3xl); margin-top: 0; }
.sk-prose h2 {
  font-size: var(--sk-fs-2xl);
  margin-top: var(--sk-space-7);
  padding-bottom: var(--sk-space-2);
  border-bottom: 1px solid var(--sk-border);
}
.sk-prose h3 { font-size: var(--sk-fs-xl); margin-top: var(--sk-space-6); }
.sk-prose h4 { font-size: var(--sk-fs-lg); margin-top: var(--sk-space-5); }

.sk-prose p { margin: 0; }
.sk-prose p + p { margin-top: var(--sk-space-4); }

.sk-prose ul, .sk-prose ol {
  margin: 0;
  padding-left: 1.35rem;
}
.sk-prose li + li { margin-top: 0.35rem; }

.sk-prose blockquote {
  margin: var(--sk-space-5) 0;
  padding: var(--sk-space-3) var(--sk-space-4);
  border-left: 2px solid var(--sk-border-strong);
  color: var(--sk-ink-muted);
  background: var(--sk-surface);
  border-radius: 0 var(--sk-radius-sm) var(--sk-radius-sm) 0;
}
.sk-prose blockquote p { margin: 0; }

.sk-prose hr {
  border: 0;
  border-top: 1px solid var(--sk-border);
  margin: var(--sk-space-6) 0;
}

.sk-prose img { max-width: 100%; height: auto; border-radius: var(--sk-radius); }

/* Anchor link on headings */
.sk-anchor {
  color: var(--sk-ink-subtle);
  margin-left: 0.4em;
  text-decoration: none;
  opacity: 0;
  font-weight: 400;
  font-size: 0.8em;
}
.sk-prose h1:hover .sk-anchor,
.sk-prose h2:hover .sk-anchor,
.sk-prose h3:hover .sk-anchor,
.sk-prose h4:hover .sk-anchor { opacity: 1; }

/* ---------- Breadcrumb + TOC ---------- */

.sk-breadcrumb {
  font-size: var(--sk-fs-sm);
  color: var(--sk-ink-subtle);
  margin-bottom: var(--sk-space-3);
}
.sk-breadcrumb a { color: var(--sk-ink-muted); text-decoration: none; }
.sk-breadcrumb a:hover { color: var(--sk-ink); }
.sk-breadcrumb__sep { margin: 0 0.4em; opacity: 0.5; }

.sk-toc {
  font-size: var(--sk-fs-sm);
  color: var(--sk-ink-muted);
  border-left: 1px solid var(--sk-border);
  padding-left: var(--sk-space-4);
}
.sk-toc__title {
  font-size: var(--sk-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sk-ink-subtle);
  margin: 0 0 var(--sk-space-2);
  font-weight: 600;
}
.sk-toc a {
  display: block;
  padding: 0.2rem 0;
  color: var(--sk-ink-muted);
  text-decoration: none;
}
.sk-toc a:hover { color: var(--sk-ink); }
.sk-toc a.is-active { color: var(--sk-accent-ink); }

/* ---------- Code ---------- */

.sk-prose code {
  font-family: var(--sk-font-mono);
  font-size: 0.92em;
}

code.sk-code--inline,
.sk-prose :not(pre) > code {
  padding: 0.12em 0.38em;
  background: var(--sk-surface);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius-sm);
  color: var(--sk-ink);
  white-space: nowrap;
}

pre.sk-code,
.sk-prose pre {
  margin: 0;
  padding: var(--sk-space-4) var(--sk-space-5);
  background: var(--sk-surface);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius);
  overflow-x: auto;
  font-family: var(--sk-font-mono);
  font-size: var(--sk-fs-sm);
  line-height: 1.55;
  color: var(--sk-ink);
}
.sk-prose pre code { padding: 0; background: transparent; border: 0; white-space: pre; }

.sk-kbd {
  display: inline-block;
  padding: 0.05em 0.45em;
  font-family: var(--sk-font-mono);
  font-size: 0.85em;
  color: var(--sk-ink);
  background: var(--sk-surface-raised);
  border: 1px solid var(--sk-border-strong);
  border-bottom-width: 2px;
  border-radius: var(--sk-radius-sm);
  line-height: 1.4;
}

/* ---------- Callouts ---------- */

.sk-callout {
  margin: var(--sk-space-5) 0;
  padding: var(--sk-space-4) var(--sk-space-5);
  border: 1px solid var(--sk-border);
  border-left-width: 1px;
  border-radius: var(--sk-radius);
  background: var(--sk-surface);
  color: var(--sk-ink);
}
.sk-callout__title {
  font-weight: 600;
  margin: 0 0 var(--sk-space-1);
  display: flex; align-items: center; gap: 0.5em;
  font-size: var(--sk-fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.sk-callout p { margin: 0; }
.sk-callout p + p { margin-top: var(--sk-space-2); }

.sk-callout--note  { border-color: var(--sk-border-strong); }
.sk-callout--note  .sk-callout__title { color: var(--sk-ink-muted); }

.sk-callout--tip   { background: var(--sk-yes-soft); border-color: oklch(from var(--sk-yes) l c h / 0.35); }
.sk-callout--tip   .sk-callout__title { color: var(--sk-yes); }

.sk-callout--warn  { background: var(--sk-warn-soft); border-color: oklch(from var(--sk-warn) l c h / 0.35); }
.sk-callout--warn  .sk-callout__title { color: oklch(from var(--sk-warn) calc(l - 0.15) c h); }
[data-theme="dark"] .sk-callout--warn .sk-callout__title { color: var(--sk-warn); }

.sk-callout--danger{ background: var(--sk-no-soft); border-color: oklch(from var(--sk-no) l c h / 0.35); }
.sk-callout--danger .sk-callout__title { color: var(--sk-no); }

/* ---------- Tables (docs) ---------- */

.sk-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--sk-fs-sm);
  background: var(--sk-surface-raised);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius);
  overflow: hidden;
}
.sk-table th, .sk-table td {
  padding: 0.55rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--sk-border);
  vertical-align: top;
}
.sk-table thead th {
  background: var(--sk-surface);
  font-weight: 600;
  color: var(--sk-ink);
  font-size: var(--sk-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.sk-table tbody tr:last-child td { border-bottom: 0; }
.sk-table tbody tr:nth-child(even) td {
  background: oklch(from var(--sk-surface) calc(l - 0.005) c h);
}

/* ---------- Badges (for doc examples) ---------- */

.sk-badge {
  display: inline-flex; align-items: center; gap: 0.35em;
  padding: 0.1em 0.55em;
  font-size: 0.8em;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  line-height: 1.4;
}
.sk-badge--yes  { background: var(--sk-yes-soft); color: var(--sk-yes);
                  border-color: oklch(from var(--sk-yes) l c h / 0.35); }
.sk-badge--yes::before { content: "✓"; }
.sk-badge--no   { background: var(--sk-no-soft); color: var(--sk-no);
                  border-color: oklch(from var(--sk-no) l c h / 0.35); }
.sk-badge--no::before { content: "✕"; }
.sk-badge--null {
  background: var(--sk-hatch), var(--sk-surface);
  color: var(--sk-ink-subtle);
  border-color: var(--sk-border);
  font-style: italic;
}
.sk-badge--null::before { content: "∅"; }

/* ---------- Diagram container ---------- */

.sk-diagram {
  margin: var(--sk-space-5) 0;
  padding: var(--sk-space-5);
  background: var(--sk-surface-raised);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius);
  text-align: center;
}
.sk-diagram > svg, .sk-diagram > img {
  max-width: 100%; height: auto;
  display: block; margin: 0 auto;
}
.sk-diagram figcaption {
  margin-top: var(--sk-space-3);
  font-size: var(--sk-fs-sm);
  color: var(--sk-ink-subtle);
}

/* ---------- Utilities ---------- */

.sk-muted { color: var(--sk-ink-muted); }
.sk-subtle { color: var(--sk-ink-subtle); }
.sk-mono { font-family: var(--sk-font-mono); }

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Narrow viewports ---------- */

/* ---------- Topbar sub-elements ---------- */

.sk-topbar__brand {
  display: inline-flex; align-items: baseline; gap: var(--sk-space-3);
  color: var(--sk-ink); text-decoration: none;
}
.sk-topbar__tagline {
  font-size: var(--sk-fs-sm);
  color: var(--sk-ink-subtle);
  letter-spacing: 0;
}
@media (max-width: 720px) { .sk-topbar__tagline { display: none; } }

.sk-topbar__actions {
  margin-left: auto;
  display: inline-flex; align-items: center; gap: var(--sk-space-3);
}
.sk-topbar__link {
  color: var(--sk-ink-muted);
  text-decoration: none;
  font-size: var(--sk-fs-sm);
  padding: 0.3rem 0.5rem;
  border-radius: var(--sk-radius-sm);
}
.sk-topbar__link:hover { color: var(--sk-ink); background: var(--sk-surface); }

.sk-theme-toggle__label { font-size: var(--sk-fs-sm); }

/* ---------- Wordmark ---------- */

.sk-wordmark {
  font-family: var(--sk-font-ui);
  font-weight: 700;
  font-size: var(--sk-fs-lg);
  letter-spacing: -0.02em;
  color: var(--sk-ink);
}
.sk-wordmark__accent { color: var(--sk-accent); }

/* ---------- Sidebar extras ---------- */

.sk-sidebar__nav { display: block; }
.sk-sidebar__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sk-sidebar__heading {
  margin: var(--sk-space-4) 0 var(--sk-space-2);
  padding: 0 var(--sk-space-2);
  font-size: var(--sk-fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sk-ink-subtle);
}
.sk-sidebar__heading:first-child { margin-top: 0; }

/* ---------- Footer ---------- */

.sk-footer {
  grid-area: footer;
  border-top: 1px solid var(--sk-border);
  background: var(--sk-surface);
  color: var(--sk-ink-muted);
  font-size: var(--sk-fs-sm);
}
.sk-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--sk-space-4) var(--sk-space-6);
  display: flex; align-items: center; gap: var(--sk-space-5);
  flex-wrap: wrap;
}
.sk-footer__brand { font-weight: 600; color: var(--sk-ink); }
.sk-footer__meta { color: var(--sk-ink-subtle); }
.sk-footer__links {
  margin-left: auto;
  display: inline-flex; gap: var(--sk-space-4);
}
.sk-footer__links a {
  color: var(--sk-ink-muted);
  text-decoration: none;
}
.sk-footer__links a:hover { color: var(--sk-ink); }

/* ---------- Page header (landing / sitemap) ---------- */

.sk-page-header { margin-bottom: var(--sk-space-6); }
.sk-page-header__kicker,
.sk-hero__kicker {
  display: inline-block;
  font-size: var(--sk-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--sk-accent-ink);
  font-weight: 600;
  margin-bottom: var(--sk-space-2);
}
.sk-page-header__title {
  font-size: var(--sk-fs-3xl);
  line-height: var(--sk-lh-tight);
  letter-spacing: -0.02em;
  margin: 0 0 var(--sk-space-3);
  color: var(--sk-ink);
}
.sk-page-header__lede {
  font-size: var(--sk-fs-lg);
  color: var(--sk-ink-muted);
  max-width: var(--sk-prose-w);
  margin: 0;
}

.sk-section__title {
  font-size: var(--sk-fs-xl);
  letter-spacing: -0.01em;
  margin: var(--sk-space-7) 0 var(--sk-space-4);
  color: var(--sk-ink);
}

/* ---------- Hero ---------- */

.sk-hero {
  padding: var(--sk-space-7) 0 var(--sk-space-6);
  max-width: 880px;
}
.sk-hero__title {
  font-size: clamp(2rem, 1.3rem + 2.4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0 0 var(--sk-space-4);
  color: var(--sk-ink);
  font-weight: 700;
}
.sk-hero__lede {
  font-size: var(--sk-fs-lg);
  color: var(--sk-ink-muted);
  max-width: 62ch;
  margin: 0 0 var(--sk-space-5);
}
.sk-hero__cta {
  display: inline-flex; gap: var(--sk-space-3);
  flex-wrap: wrap;
}

/* ---------- CTAs ---------- */

.sk-cta {
  display: inline-flex; align-items: center; gap: 0.5em;
  padding: 0.6rem 1.1rem;
  border-radius: var(--sk-radius);
  font: inherit;
  font-weight: 600;
  font-size: var(--sk-fs-md);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}
.sk-cta--primary {
  background: var(--sk-accent);
  color: oklch(20% 0.040 240);
  border-color: oklch(from var(--sk-accent) calc(l - 0.08) c h);
}
.sk-cta--primary:hover {
  background: oklch(from var(--sk-accent) calc(l - 0.04) c h);
}
.sk-cta--secondary {
  background: var(--sk-surface-raised);
  color: var(--sk-ink);
  border-color: var(--sk-border-strong);
}
.sk-cta--secondary:hover {
  background: var(--sk-surface);
  border-color: var(--sk-ink-muted);
}

/* ---------- Feature grid (landing) ---------- */

.sk-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sk-space-4);
  margin-top: var(--sk-space-4);
}
.sk-feature {
  padding: var(--sk-space-5);
  background: var(--sk-surface-raised);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius);
}
.sk-feature__title {
  margin: 0 0 var(--sk-space-2);
  font-size: var(--sk-fs-md);
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--sk-ink);
}
.sk-feature__body {
  margin: 0;
  color: var(--sk-ink-muted);
  font-size: var(--sk-fs-sm);
  line-height: var(--sk-lh-body);
}

/* ---------- Next steps block ---------- */

.sk-next {
  margin-top: var(--sk-space-7);
  padding: var(--sk-space-5);
  background: var(--sk-surface);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius);
}
.sk-next__list {
  list-style: none;
  margin: var(--sk-space-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--sk-space-2);
}
.sk-next__list li { padding-left: 1.2em; position: relative; }
.sk-next__list li::before {
  content: "→";
  position: absolute; left: 0;
  color: var(--sk-accent);
  font-weight: 700;
}

/* ---------- Sitemap ---------- */

.sk-sitemap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--sk-space-5);
  margin-top: var(--sk-space-5);
}
.sk-sitemap__section {
  padding: var(--sk-space-4) var(--sk-space-5);
  background: var(--sk-surface-raised);
  border: 1px solid var(--sk-border);
  border-radius: var(--sk-radius);
}
.sk-sitemap__section h2,
.sk-sitemap__section h3 {
  margin: 0 0 var(--sk-space-2);
  font-size: var(--sk-fs-md);
  color: var(--sk-ink);
  border: 0;
  padding: 0;
}
.sk-sitemap__section ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}
.sk-sitemap__section a {
  display: inline-block;
  color: var(--sk-ink-muted);
  text-decoration: none;
  font-size: var(--sk-fs-sm);
}
.sk-sitemap__section a:hover { color: var(--sk-accent-ink); text-decoration: underline; }

/* ---------- Narrow viewports ---------- */

@media (max-width: 900px) {
  .sk-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "content"
      "footer";
  }
  .sk-sidebar { display: none; }
  .sk-content { padding: var(--sk-space-5) var(--sk-space-4); }
  .sk-footer__inner { padding: var(--sk-space-4); }
  .sk-footer__links { margin-left: 0; }
}
