/*
 * Site chrome — header, brand, search shell host, tabs rail, menus, toggles.
 * Depends on tokens.css + ui-kit.css. SERP-specific density lives in search.css.
 */

/*
 * Inter, split by script. The 70 KB Latin subset (both variable axes, kerning,
 * tabular figures) covers almost every page; the full 337 KB file is only
 * fetched when a page contains Greek, Cyrillic, Vietnamese or extended Latin.
 * Ranges are disjoint, and the Latin face is declared first: Chrome loads the
 * first-declared face for line metrics, so this order avoids fetching both.
 */
@font-face {
  font-family: "InterVar";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/s/inter-latin.woff2") format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "InterVar";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/s/inter.woff2") format("woff2");
  /* Script glyphs only (Latin Ext, Greek, Cyrillic, Vietnamese, currency),
     generated from Inter's cmap and disjoint from the Latin subset: Chrome
     fetches every face whose range intersects the page. Symbols and emoji
     fall back to system fonts rather than pulling 337 KB. */
  unicode-range:
    U+0100-0130, U+0132-0151, U+0154-02BA, U+02BD-02C5, U+02C7-02D9, U+02DB, U+02DD-0303, U+0306-0307, U+0309-03DD, U+03F0-04FF, U+052F, U+0E3F, U+1D43-1D65, U+1D9C-1DA0, U+1DBB-1FFE, U+20A0-20AB, U+20AD-20BF;
}

/* Same-site MPA navigations (home ↔ bangs ↔ about, etc.). Destination must
   opt in too, or Chrome aborts with InvalidStateError / "opt-in disabled". */
@view-transition {
  navigation: auto;
}

@media (prefers-reduced-motion: reduce) {
  @view-transition {
    navigation: none;
  }
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: var(--duration-view, 0.1s);
  animation-timing-function: var(--ease-out, cubic-bezier(0.23, 1, 0.32, 1));
}

* {
  box-sizing: border-box;
  min-width: 0;
  text-underline-offset: 3px;
  -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
}

::selection {
  background: color-mix(in srgb, var(--blue) 28%, transparent);
  color: var(--text);
}

/* Tokens: /s/tokens.css */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    /* 0s, not 0.01ms: a tiny duration turns every property (default
       transition-property: all) into a real transition, and visibility stays
       hidden until its first frame, so opened popovers weren't focusable. */
    transition-duration: 0s !important;
    scroll-behavior: auto !important;
  }
}

html {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--muted) 35%, transparent) var(--bg);
  background-color: var(--bg);
  scrollbar-gutter: stable;
  overflow-x: hidden;
}

body {
  display: flex;
  width: 100%;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  flex-direction: column;
  overflow-x: hidden;
  color: var(--text);
}

h1,
h2,
h3,
h4 {
  overflow-wrap: break-word;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

input,
textarea,
select {
  field-sizing: content;
}

.search-bar input,
input.searchinput,
input[name="q"] {
  field-sizing: fixed;
  min-width: 0;
}

header {
  --serp-chrome-width: 672px;
  max-width: 1136px;
  margin: 0 auto;
  width: 100%;
  padding: 12px 18px 0;
  padding-left: max(18px, env(safe-area-inset-left));
  padding-right: max(18px, env(safe-area-inset-right));
  padding-top: max(12px, env(safe-area-inset-top));
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 40;
  background: var(--bg);

  @media (max-width: 900px) {
    --serp-chrome-width: 100%;
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
    position: sticky;
    top: 0;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
}

/* Lift header above the transparent dismiss scrim while omnibox is open. */
html.omnibox-open header,
body.omnibox-open header {
  z-index: 10060;
  position: sticky;
  top: 0;
  background: var(--bg);
  isolation: isolate;
}

.header-row {
  --brand-slot: 7.5rem;
  --brand-gap: 1.75rem;
  display: flex;
  align-items: center;
  gap: var(--brand-gap);
  width: calc(100% + var(--brand-slot) + var(--brand-gap));
  margin-left: calc(-1 * (var(--brand-slot) + var(--brand-gap)));

  @media (max-width: 1100px) {
    --brand-slot: 6.5rem;
    --brand-gap: 1.25rem;
  }

  @media (max-width: 900px) {
    --brand-slot: auto;
    --brand-gap: 8px;
    width: 100%;
    margin-left: 0;
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    align-items: center;
    column-gap: 8px;
    row-gap: 10px;
  }

  /* Desktop general pages: center the search field only.
     Side padding keeps the absolute logo/actions from covering the bar. */
  @media (min-width: 901px) {
    width: 100%;
    margin-left: 0;
    justify-content: center;
    position: relative;
    padding-inline: calc(var(--brand-slot) + var(--brand-gap));
    box-sizing: border-box;
  }
}

.header-row > form,
.header-row > .search-container {
  flex: 1;
  min-width: 0;
  max-width: var(--serp-chrome-width);
  width: 100%;

  @media (min-width: 901px) {
    flex: 0 1 var(--serp-chrome-width);
  }

  @media (max-width: 900px) {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    max-width: none;
  }
}

.brand-logo {
  --brand-logo-w: 7.25rem;
  display: block;
  width: var(--brand-logo-w);
  height: calc(var(--brand-logo-w) * 38 / 200);
  background-color: currentColor;
  -webkit-mask: url(/s/logo.svg) center / contain no-repeat;
  mask: url(/s/logo.svg) center / contain no-repeat;
}

.brand-link {
  flex: 0 0 var(--brand-slot);
  width: var(--brand-slot);
  max-width: var(--brand-slot);
  color: var(--text);
  text-decoration: none;
  line-height: 1;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 2px;
  transition: opacity var(--duration-base) var(--ease-out);

  @media (hover: hover) {
    &:hover {
      color: var(--text);
      opacity: 0.72;
    }
  }

  &:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 3px;
    border-radius: var(--r-sm);
  }

  @media (min-width: 901px) {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    flex: none;
    width: auto;
    max-width: none;
    justify-content: flex-start;
  }

  @media (max-width: 900px) {
    grid-column: 1;
    grid-row: 1;
    flex: none;
    width: auto;
    max-width: none;
    min-height: 44px;
    justify-content: flex-start;
    align-self: center;
    justify-self: start;
    padding: 0;
  }
}

.search-container {
  display: flex;
  width: 100%;
  min-width: 0;

  .search-bar {
    height: var(--search-bar-height, 48px);
    background-color: var(--search-bar-bg, var(--bg));
    border: 1px solid var(--border);
    width: 100%;
    border-radius: var(--omnibox-radius, var(--r-search));
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 16px 0 18px;
    cursor: text;
    box-shadow: var(--search-bar-shadow);
    transition:
      border-color var(--duration-base) var(--ease-out),
      box-shadow var(--duration-slow) var(--ease-out),
      border-radius var(--duration-open) var(--ease-out);

    @media (hover: hover) {
      &:hover:not(.omnibox-open) {
        border-color: var(--border-strong);
        box-shadow: var(--search-bar-shadow-hover);
      }
    }

    &:focus-within:not(.omnibox-open) {
      border-color: var(--border-strong);
      box-shadow: var(--search-bar-shadow-focus);
      outline: none;
    }

    .search-icon {
      flex-shrink: 0;
      width: 18px;
      height: 18px;
      color: var(--muted);
      pointer-events: none;
      transition: color var(--duration-base) var(--ease-out);
    }

    &:focus-within .search-icon {
      color: var(--blue);
    }

    input {
      background-color: transparent;
      border: none;
      height: 100%;
      flex: 1;
      min-width: 0;
      width: 100%;
      field-sizing: fixed;
      padding: 0 8px;
      font-size: 16px;
      letter-spacing: -0.01em;
      font-family: inherit;
      color: var(--text);
      outline: none;

      &:focus {
        outline: none;
      }

      &::placeholder {
        color: var(--muted);
        user-select: none;
      }
    }
  }
}

:root[data-theme="dark"] .search-container .search-bar {
  box-shadow: var(--search-bar-shadow);

  &:hover:not(.omnibox-open),
  &:focus-within:not(.omnibox-open) {
    border-color: var(--border-strong);
    box-shadow: var(--search-bar-shadow-focus);
  }
}

.body {
  --page-gutter: 18px;
  --page-brand-slot: 7.5rem;
  --page-brand-gap: 1.75rem;
  --page-content-width: 40rem;
  max-width: 1136px;
  margin: 0 auto;
  display: block;
  width: 100%;
  padding: 28px var(--page-gutter) 72px;
  /* align content with the search field column */
  padding-left: calc(
    var(--page-gutter) +
    var(--page-brand-slot) +
    var(--page-brand-gap)
  );
  box-sizing: border-box;

  @media (max-width: 1100px) {
    --page-brand-slot: 6.5rem;
    --page-brand-gap: 1.25rem;
  }

  @media (max-width: 900px) {
    --page-gutter: 12px;
    padding-left: var(--page-gutter);
    padding-right: var(--page-gutter);
    padding-top: 20px;
    padding-bottom: 48px;
  }
}

.body > main {
  max-width: var(--page-content-width);
  width: 100%;
}

/* Static pages (About, Terms, API, …): center the reading column under the
   search bar instead of offsetting it under the brand/search column. */
.body--page {
  padding-left: var(--page-gutter);
  padding-right: var(--page-gutter);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.body--page > main {
  margin-inline: 0;
}

.page-title {
  font-size: clamp(1.85rem, 4.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  margin: 4px 0 28px;
  line-height: 1.15;
  color: var(--text);

  @media (max-width: 900px) {
    font-size: 1.65rem;
    margin: 0 0 18px;
  }
}

/* site-wide share + hamburger — vertically centered with the search bar */
/* Site menu + toggle live in ui-catalog.css (shared with the SERP). */
/* Desktop chrome pages: keep actions in the top-right of the centered row */
@media (min-width: 901px) {
  .header-row > .site-actions {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    margin-left: 0;
  }
}