@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap");

:root {
  color-scheme: light;
  --bg: hsl(0, 0%, 100%);
  --surface: #ffffff;
  --surface-muted: hsl(210, 25%, 98%);
  --line: hsl(210, 9%, 91%);
  --line-soft: hsl(210, 9%, 95%);
  --text: hsl(210, 11%, 15%);
  --muted: hsl(210, 8%, 40%);
  --brand: hsl(210, 100%, 50%);
  --brand-700: hsl(218, 95%, 40%);
  --brand-800: hsl(218, 95%, 32%);
  --brand-soft: hsl(210, 100%, 97%);
  --brand-soft-2: hsl(210, 100%, 94%);
  --accent: hsl(43, 98%, 51%);
  --radius: 0.75rem;
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--surface-muted);
  color: var(--text);
  font-family: "Space Grotesk", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header — matches platform Header.tsx visual exactly */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  background: var(--brand);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 4rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-link img {
  height: 1.5rem;
  object-fit: contain;
}

.brand-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1;
}

.app-link {
  display: inline-flex;
  align-items: center;
  background: #ffffff;
  color: var(--brand-700);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.55rem 1.1rem;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}

.app-link:hover {
  background: var(--brand-soft);
}

/* Layout */
.layout {
  max-width: 1280px;
  margin: 1.5rem auto 3rem;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.sidebar,
.main-content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sidebar {
  padding: 1rem;
  position: sticky;
  top: 5rem;
  max-height: calc(100vh - 6rem);
  overflow: auto;
}

.search-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

#doc-search {
  width: 100%;
  font-family: inherit;
  font-size: 0.92rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.75rem;
  margin-bottom: 1rem;
  background: var(--surface-muted);
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

#doc-search:focus {
  outline: none;
  border-color: var(--brand);
  background: #ffffff;
  box-shadow: 0 0 0 3px hsla(210, 100%, 50%, 0.15);
}

#doc-search::placeholder {
  color: hsl(210, 8%, 55%);
}

.nav-group {
  margin-bottom: 1rem;
}

.nav-group-title {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 700;
  margin: 0.5rem 0 0.4rem;
}

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

.nav-list li {
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: block;
  text-decoration: none;
  color: var(--text);
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.35;
  border-left: 3px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.nav-list a:hover {
  background: var(--brand-soft);
  color: var(--brand-700);
}

.nav-list a.active {
  background: var(--brand-soft);
  color: var(--brand-700);
  font-weight: 600;
  border-left-color: var(--brand);
}

.main-content {
  padding: 2rem 2.25rem;
  min-width: 0;
}

.doc-meta {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
}

.doc-content h1,
.doc-content h2,
.doc-content h3,
.doc-content h4 {
  font-family: "Space Grotesk", "Inter", system-ui, sans-serif;
  letter-spacing: -0.015em;
  color: var(--text);
  line-height: 1.25;
}

.doc-content h1 {
  margin: 0 0 1rem;
  font-size: 2rem;
  font-weight: 700;
}

.doc-content h2 {
  margin: 2.25rem 0 0.85rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-soft);
  font-size: 1.35rem;
  font-weight: 700;
}

.doc-content h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.doc-content h4 {
  margin: 1.25rem 0 0.4rem;
  font-size: 0.98rem;
  font-weight: 600;
}

.doc-content p {
  margin: 0.75rem 0;
}

.doc-content ul,
.doc-content ol {
  padding-left: 1.35rem;
  margin: 0.75rem 0;
}

.doc-content li {
  margin: 0.3rem 0;
}

.doc-content li > p {
  margin: 0.25rem 0;
}

.doc-content a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 500;
}

.doc-content a:hover {
  text-decoration: underline;
}

.doc-content strong {
  font-weight: 600;
  color: var(--text);
}

.doc-content pre,
.doc-content code {
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.875em;
}

.doc-content pre {
  background: hsl(210, 13%, 13%);
  color: #e5e7eb;
  border-radius: 10px;
  padding: 1rem 1.1rem;
  overflow: auto;
  font-size: 0.84rem;
  line-height: 1.55;
}

.doc-content pre code {
  color: inherit;
  background: transparent;
  border: none;
  padding: 0;
}

.doc-content :not(pre) > code {
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.05rem 0.4rem;
  color: var(--brand-700);
}

.doc-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
  overflow-x: auto;
  display: block;
}

@media (min-width: 720px) {
  .doc-content table {
    display: table;
  }
}

.doc-content th,
.doc-content td {
  border: 1px solid var(--line);
  padding: 0.6rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.doc-content th {
  background: var(--surface-muted);
  font-weight: 600;
  color: var(--text);
}

.doc-content blockquote {
  border-left: 3px solid var(--brand);
  margin: 1rem 0;
  padding: 0.65rem 1rem;
  color: var(--text);
  background: var(--brand-soft);
  border-radius: 0 8px 8px 0;
}

.doc-content blockquote p {
  margin: 0.25rem 0;
}

.doc-content hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}

.doc-content img {
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid var(--line);
}

/* Mobile responsive */
@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
    padding: 0 1rem;
    margin: 1rem auto 2rem;
  }
  .sidebar {
    position: static;
    max-height: none;
  }
  .main-content {
    padding: 1.5rem 1.25rem;
  }
  .header-content {
    padding: 0 1rem;
    height: 3.5rem;
  }
  .brand-link img {
    height: 1.25rem;
  }
  .brand-tag {
    display: none;
  }
  .doc-content h1 {
    font-size: 1.6rem;
  }
  .doc-content h2 {
    font-size: 1.2rem;
  }
}