/* Token values mirror docs/design-system.md — update both in sync. */
:root {
  color-scheme: light dark;
  --color-primary-50: #edf6f7;
  --color-primary-100: #d7e8eb;
  --color-primary-500: #3f7581;
  --color-primary-600: #315d67;
  --color-primary-700: #284a52;
  --color-primary-900: #1a3035;
  --color-neutral-50: #f6f5f2;
  --color-neutral-100: #eceae4;
  --color-neutral-200: #ddd9d0;
  --color-neutral-300: #c8c2b7;
  --color-neutral-400: #9f998e;
  --color-neutral-500: #797268;
  --color-neutral-600: #605a52;
  --color-neutral-700: #4a453f;
  --color-neutral-800: #34312d;
  --color-neutral-900: #23211e;
  --color-neutral-950: #171614;
  --color-success-50: #eef7f1;
  --color-success-100: #d8e9df;
  --color-success-600: #316b49;
  --color-warning-50: #fff6ea;
  --color-warning-100: #f6e1bf;
  --color-warning-600: #9a691b;
  --color-error-50: #fcf1ee;
  --color-error-100: #f4d7d1;
  --color-error-600: #a04738;
  --color-bg-page: var(--color-neutral-50);
  --color-bg-surface: #fcfbf8;
  --color-bg-elevated: #ffffff;
  --color-bg-inset: var(--color-neutral-100);
  --color-text-primary: var(--color-neutral-900);
  --color-text-secondary: var(--color-neutral-600);
  --color-text-tertiary: var(--color-neutral-500);
  --color-text-on-primary: #ffffff;
  --color-border: var(--color-neutral-200);
  --color-border-strong: var(--color-neutral-300);
  --color-shadow-base: rgb(18 20 17 / 0.06);
  --shadow-sm: 0 1px 2px 0 var(--color-shadow-base);
  --shadow-md: 0 2px 6px -2px var(--color-shadow-base);
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;
  --font:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  --font-display:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --mono:
    ui-monospace, "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas,
    "Courier New", monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg-page: var(--color-neutral-950);
    --color-bg-surface: var(--color-neutral-900);
    --color-bg-elevated: var(--color-neutral-800);
    --color-bg-inset: var(--color-neutral-950);
    --color-text-primary: var(--color-neutral-50);
    --color-text-secondary: var(--color-neutral-300);
    --color-text-tertiary: var(--color-neutral-400);
    --color-border: var(--color-neutral-700);
    --color-border-strong: var(--color-neutral-600);
    --color-shadow-base: rgb(0 0 0 / 0.4);
    --color-warning-50: #2c2418;
    --color-warning-100: #7a5f2a;
    --color-warning-600: #f0c87a;
    --color-success-50: #202a24;
    --color-success-100: #476453;
    --color-success-600: #a8d0b7;
    --color-error-50: #2d211d;
    --color-error-100: #7d554d;
    --color-error-600: #f0b4a8;
  }
}
[data-theme="dark"] {
  --color-bg-page: var(--color-neutral-950);
  --color-bg-surface: var(--color-neutral-900);
  --color-bg-elevated: var(--color-neutral-800);
  --color-bg-inset: var(--color-neutral-950);
  --color-text-primary: var(--color-neutral-50);
  --color-text-secondary: var(--color-neutral-300);
  --color-text-tertiary: var(--color-neutral-400);
  --color-border: var(--color-neutral-700);
  --color-border-strong: var(--color-neutral-600);
  --color-shadow-base: rgb(0 0 0 / 0.4);
  --color-warning-50: #2c2418;
  --color-warning-100: #7a5f2a;
  --color-warning-600: #f0c87a;
  --color-success-50: #202a24;
  --color-success-100: #476453;
  --color-success-600: #a8d0b7;
  --color-error-50: #2d211d;
  --color-error-100: #7d554d;
  --color-error-600: #f0b4a8;
}
html {
  background: var(--color-bg-page);
  scrollbar-gutter: stable;
}
@supports (scrollbar-gutter: stable) {
  html {
    overflow-y: auto;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg-page);
  color: var(--color-text-primary);
  font-family: var(--font);
  font-size: 0.9375rem;
  line-height: 1.6;
}
a {
  color: inherit;
}
code {
  font-family: var(--mono);
  font-size: 0.875em;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}
.portal-bar {
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
}
.environment-banner {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--color-warning-100);
  background: var(--color-warning-50);
  color: var(--color-warning-600);
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: center;
}
.portal-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(960px, 100%);
  margin: 0 auto;
  padding: 0.625rem 1rem;
}
.portal-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}
.portal-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.375rem;
  height: 1.375rem;
  border-radius: var(--radius-sm);
  background: var(--color-primary-600);
  color: var(--color-text-on-primary);
  font-size: 0.6875rem;
  font-weight: 800;
  line-height: 1;
}
.portal-tools {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
}
.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.language-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.5rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition:
    border-color 0.2s ease,
    background-color 0.2s ease,
    color 0.2s ease;
}
.language-link:hover {
  border-color: var(--color-primary-500);
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}
.language-link.is-current {
  border-color: var(--color-primary-600);
  background: var(--color-primary-600);
  color: var(--color-text-on-primary);
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}
.theme-toggle:hover {
  background: var(--color-bg-inset);
}
.theme-toggle .icon-auto,
.theme-toggle .icon-dark,
.theme-toggle .icon-light {
  display: none;
}
.theme-toggle[data-theme-mode="auto"] .icon-auto,
.theme-toggle[data-theme-mode="dark"] .icon-dark,
.theme-toggle[data-theme-mode="light"] .icon-light {
  display: block;
}
.shell {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0 0 3rem;
}
.page-intro {
  padding: 1.5rem 0 1rem;
}
.page-intro:empty {
  display: none;
}
.shell > .page-body:first-child {
  padding-top: 1.5rem;
}
.page-intro h1 {
  margin: 0;
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.page-lede {
  margin: 0.375rem 0 0;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  max-width: 42rem;
  line-height: 1.5;
}
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.25rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-nav::-webkit-scrollbar {
  display: none;
}
.tab-link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.12s;
}
.tab-link:hover {
  color: var(--color-text-primary);
}
.tab-link.is-current {
  color: var(--color-primary-700);
  border-bottom-color: var(--color-primary-600);
  font-weight: 600;
}
.page-body {
  display: grid;
  gap: 1.25rem;
}
.content-section {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.125rem;
}
.content-section h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.content-section p {
  line-height: 1.6;
}
.section-kicker,
.muted {
  color: var(--color-text-tertiary);
}
.section-kicker {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
.shell-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem 1rem;
  margin: 0;
}
.shell-meta dt {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-text-secondary);
}
.shell-meta dd {
  margin: 0.125rem 0 0;
  font-weight: 600;
  font-size: 0.875rem;
  word-break: break-word;
}
dt,
dd {
  line-height: 1.4;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.12s;
}
.button-primary {
  background: var(--color-primary-600);
  color: var(--color-text-on-primary);
}
.button-primary:hover {
  background: var(--color-primary-700);
}
.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.button-secondary {
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
  border-width: 1.5px;
}
.button-secondary:hover {
  background: var(--color-neutral-100);
  border-color: var(--color-neutral-400);
}