/* UOR Foundation — Complete Stylesheet
   No external dependencies. System font stack throughout.
   Responsive breakpoints: mobile ≤768px, tablet ≤1024px, desktop >1024px
*/

/* ── Reset & Base ──────────────────────────────────────────────────────────── */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji";
  font-size: 1rem;
  line-height: 1.6;
  color: #1a1a2e;
  background: #f8f9fa;
  margin: 0;
  padding: 0;
}

/* ── Skip Link ─────────────────────────────────────────────────────────────── */

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: #0066cc;
  color: #fff;
  border-radius: 0 0 0.25rem 0.25rem;
  text-decoration: none;
  font-weight: 600;
  transition: top 0.15s;
  z-index: 9999;
}

.skip-link:focus {
  top: 0;
}

/* ── Header ────────────────────────────────────────────────────────────────── */

.site-header {
  background: #0a0a1a;
  color: #e8e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid #0066cc;
}

.site-logo {
  color: #7eb8ff;
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-logo:hover {
  color: #a8d4ff;
}

/* ── Navigation ────────────────────────────────────────────────────────────── */

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.site-nav li {
  position: relative;
}

.site-nav a {
  color: #c8d0e8;
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.site-nav a:hover,
.site-nav a:focus {
  color: #7eb8ff;
  border-bottom-color: #7eb8ff;
  outline: none;
}

.site-nav li.current > a {
  color: #7eb8ff;
  border-bottom-color: #7eb8ff;
}

/* Dropdown nav */
.site-nav li ul {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: #0d0d1f;
  border: 1px solid #2a2a4a;
  border-radius: 0.25rem;
  padding: 0.5rem 0;
  min-width: 14rem;
  flex-direction: column;
  gap: 0;
  z-index: 200;
}

.site-nav li:hover ul,
.site-nav li:focus-within ul {
  display: flex;
}

.site-nav li ul li {
  width: 100%;
}

.site-nav li ul a {
  display: block;
  padding: 0.4rem 1rem;
  border-bottom: none;
  font-size: 0.875rem;
}

/* ── Breadcrumb ────────────────────────────────────────────────────────────── */

.breadcrumb {
  padding: 0.5rem 2rem;
  background: #eef2f8;
  border-bottom: 1px solid #dde3ef;
  font-size: 0.875rem;
}

.breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.breadcrumb li::before {
  content: "›";
  margin-right: 0.5rem;
  color: #6b7280;
}

.breadcrumb li:first-child::before {
  display: none;
}

.breadcrumb a {
  color: #0066cc;
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* ── Main Content ──────────────────────────────────────────────────────────── */

#main-content {
  min-height: calc(100vh - 10rem);
}

.page-content {
  max-width: 64rem;
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
}

/* ── Typography ────────────────────────────────────────────────────────────── */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: #0a0a1a;
  margin-top: 2em;
  margin-bottom: 0.5em;
}

h1 { font-size: 2rem; margin-top: 0; }
h2 { font-size: 1.5rem; border-bottom: 2px solid #e5e9f0; padding-bottom: 0.25rem; }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1rem; }

a {
  color: #0066cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus {
  outline: 2px solid #0066cc;
  outline-offset: 2px;
  border-radius: 2px;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
  background: #eef2f8;
  padding: 0.1em 0.35em;
  border-radius: 3px;
  color: #1a1a3e;
}

pre {
  background: #0a0a1a;
  color: #e8e8f0;
  padding: 1.25rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.5;
  margin: 1.5rem 0;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* ── Tables ────────────────────────────────────────────────────────────────── */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  overflow-x: auto;
  display: block;
}

thead {
  background: #1a1a3e;
  color: #e8e8f0;
}

thead th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid #e5e9f0;
}

tbody tr:nth-child(even) {
  background: #f4f7fc;
}

tbody tr:hover {
  background: #e8f0fc;
}

tbody td {
  padding: 0.6rem 1rem;
  vertical-align: top;
}

/* ── Definitions ───────────────────────────────────────────────────────────── */

dl {
  margin: 0 0 1.5rem;
}

dt {
  font-weight: 600;
  color: #374151;
  margin-top: 0.75rem;
}

dt:first-child {
  margin-top: 0;
}

dd {
  margin-left: 1rem;
  margin-bottom: 0.25rem;
  color: #4b5563;
}

.ns-meta {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.25rem 1rem;
  background: #eef2f8;
  border-left: 4px solid #0066cc;
  padding: 1rem 1.25rem;
  border-radius: 0 0.5rem 0.5rem 0;
  margin: 1.5rem 0;
}

.ns-meta dt {
  font-weight: 600;
  color: #374151;
  margin-top: 0;
}

.ns-meta dd {
  margin-left: 0;
  margin-bottom: 0;
}

/* ── Hero Section ──────────────────────────────────────────────────────────── */

.hero {
  background: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 100%);
  color: #e8e8f0;
  padding: 4rem 2rem;
  text-align: center;
  margin: -2rem -2rem 3rem;
}

.hero h1 {
  color: #e8e8f0;
  font-size: 2.5rem;
  margin-top: 0;
}

.hero .tagline {
  font-size: 1.125rem;
  color: #c8d0e8;
  max-width: 40rem;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */

.btn-primary,
.btn-secondary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
  text-decoration: none;
  margin: 0.25rem;
  transition: background 0.15s, color 0.15s;
}

.btn-primary {
  background: #0066cc;
  color: #fff;
}

.btn-primary:hover {
  background: #0052a3;
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: #7eb8ff;
  border: 2px solid #7eb8ff;
}

.btn-secondary:hover {
  background: #7eb8ff;
  color: #0a0a1a;
  text-decoration: none;
}

/* ── Inventory Bar ─────────────────────────────────────────────────────────── */

.inventory {
  background: #eef2f8;
  border: 1px solid #dde3ef;
  border-radius: 0.5rem;
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  text-align: center;
}

.inventory h2 {
  margin-top: 0;
  font-size: 1.125rem;
  border-bottom: none;
}

.inventory p {
  margin: 0;
  color: #374151;
  font-size: 0.9rem;
}

/* ── Namespace Grid ────────────────────────────────────────────────────────── */

.namespace-grid h2 {
  margin-top: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.ns-card {
  background: #fff;
  border: 1px solid #dde3ef;
  border-radius: 0.5rem;
  padding: 1.25rem;
  border-left: 4px solid #0066cc;
  transition: box-shadow 0.15s;
}

.ns-card:hover {
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.15);
}

.ns-card.ns-space-kernel { border-left-color: #7c3aed; }
.ns-card.ns-space-user   { border-left-color: #0891b2; }
.ns-card.ns-space-bridge { border-left-color: #059669; }

.ns-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.ns-card h3 a {
  color: #0a0a1a;
}

.ns-iri {
  font-size: 0.8rem;
  color: #6b7280;
  margin: 0 0 0.5rem;
  word-break: break-all;
}

.ns-iri code {
  background: none;
  padding: 0;
  color: #6b7280;
}

.ns-counts {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.25rem;
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
}

.ns-counts dt {
  color: #6b7280;
  font-weight: 500;
  margin-top: 0;
}

.ns-counts dd {
  margin-left: 0;
  font-weight: 700;
  color: #0a0a1a;
}

/* ── Space Classification Badges ───────────────────────────────────────────── */

.space-kernel { color: #7c3aed; font-weight: 600; }
.space-user   { color: #0891b2; font-weight: 600; }
.space-bridge { color: #059669; font-weight: 600; }

/* ── Search ────────────────────────────────────────────────────────────────── */

form[role="search"] {
  margin: 1.5rem 0;
}

form[role="search"] label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #374151;
}

#search-input {
  width: 100%;
  max-width: 32rem;
  padding: 0.75rem 1rem;
  border: 2px solid #dde3ef;
  border-radius: 0.375rem;
  font-size: 1rem;
  font-family: inherit;
  color: #0a0a1a;
  background: #fff;
  transition: border-color 0.15s;
}

#search-input:focus {
  border-color: #0066cc;
  outline: none;
}

#search-results {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

#search-results li {
  padding: 0.75rem 0;
  border-bottom: 1px solid #e5e9f0;
}

#search-results a {
  font-weight: 600;
  font-size: 1rem;
}

.result-kind {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1em 0.5em;
  background: #eef2f8;
  border-radius: 9999px;
  font-size: 0.75rem;
  color: #374151;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-desc {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: #4b5563;
}

/* ── Footer ────────────────────────────────────────────────────────────────── */

.site-footer {
  background: #0a0a1a;
  color: #8090a8;
  text-align: center;
  padding: 1.5rem 2rem;
  font-size: 0.875rem;
  border-top: 2px solid #1a1a3e;
}

.site-footer a {
  color: #7eb8ff;
}

/* ── Responsive ────────────────────────────────────────────────────────────── */

@media (max-width: 1024px) {
  .page-content {
    padding: 1.5rem 1.5rem 3rem;
  }

  .hero {
    padding: 3rem 1.5rem;
    margin: -1.5rem -1.5rem 2rem;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  }
}

@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .site-nav ul {
    gap: 1rem;
    flex-wrap: wrap;
  }

  .page-content {
    padding: 1rem 1rem 2rem;
  }

  .hero {
    padding: 2rem 1rem;
    margin: -1rem -1rem 1.5rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero .tagline {
    font-size: 1rem;
  }

  .breadcrumb {
    padding: 0.5rem 1rem;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  table {
    font-size: 0.8rem;
  }

  .ns-meta {
    grid-template-columns: 1fr;
  }
}

/* ── Docs two-column layout ─────────────────────────────────────────────────── */

.docs-layout {
  display: flex;
  align-items: flex-start;
  min-height: calc(100vh - 3.5rem);
}

.docs-sidebar {
  flex: 0 0 17rem;
  width: 17rem;
  background: #0d0d1f;
  border-right: 1px solid #1e1e3a;
  position: sticky;
  top: 3.5rem;
  max-height: calc(100vh - 3.5rem);
  overflow: hidden;
  z-index: 1;
}

/* Scroll container is the inner nav, NOT the sticky aside.
   Putting overflow-y: auto directly on a position:sticky element causes
   stacking-context bugs in Safari/Firefox where the sidebar paints above
   the site-header dropdown (z-index:100) despite having no explicit z-index. */
.docs-sidebar nav {
  max-height: calc(100vh - 3.5rem);
  overflow-y: auto;
  padding: 1.5rem 0;
}

.docs-layout > main {
  flex: 1;
  min-width: 0;
}

.docs-sidebar nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.docs-sidebar nav > ul > li > a,
.docs-sidebar nav > ul > li > span {
  display: block;
  padding: 0.4rem 1.25rem;
  font-size: 0.9rem;
  color: #b0b8d0;
  text-decoration: none;
  font-weight: 600;
}

.docs-sidebar nav > ul > li > a:hover {
  color: #7eb8ff;
}

.docs-sidebar .nav-group > ul {
  padding-left: 1rem;
}

.docs-sidebar .nav-group > ul a {
  display: block;
  padding: 0.25rem 1.25rem;
  font-size: 0.85rem;
  color: #8090b8;
  text-decoration: none;
}

.docs-sidebar .nav-group > ul a:hover {
  color: #7eb8ff;
}

.docs-sidebar .nav-group > span {
  display: block;
  padding: 0.75rem 1.25rem 0.2rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #505880;
}

@media (max-width: 768px) {
  .docs-layout {
    flex-direction: column;
  }

  .docs-sidebar {
    flex: none;
    width: 100%;
    position: static;
    max-height: none;
    overflow: visible;
    border-right: none;
    border-bottom: 1px solid #1e1e3a;
  }

  .docs-sidebar nav {
    max-height: none;
    overflow-y: visible;
  }
}