/*
 * The master layout: site tokens, the fixed header, the theme toggle and the footer.
 *
 * The header is the same bar the documentation draws (packages/web/src/components/Header.astro and
 * its site-header.css twin): glass over the page, a velvet edge along the rounded lower corners, the
 * navigation in a tray, and the same brand, accent and hover tokens. Keep the two in step.
 *
 * Themes: light is the default and needs no attribute. Dark is `html[data-theme="dark"]`, set before
 * first paint by the boot script in entry-server.tsx and switched by the theme toggle. Nothing here
 * reads `prefers-color-scheme`; the reader's explicit choice is the only input.
 */

:root {
  color-scheme: light;

  --site-header-h: 64px;
  --site-radius: 18px;
  --site-edge-w: 1.5px;
  --site-font: var(--font-mono, "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace);

  --site-surface: #ffffff;
  --site-surface-sunk: #f7f7fa;
  --site-brand: #16256b;
  --site-text: hsl(222, 8%, 38%);
  --site-text-strong: hsl(226, 24%, 14%);
  --site-text-weak: hsl(222, 6%, 52%);
  --site-hairline: rgb(22 37 107 / 0.1);

  --site-glass-fill: rgb(255 255 255 / 0.78);
  --site-glass-blur: saturate(140%) blur(14px);
  --site-glass-shadow: 0 1px 1px rgb(13 23 68 / 0.03), 0 10px 30px -18px rgb(13 23 68 / 0.18);
  --site-sheen-soft: linear-gradient(135deg, rgb(59 11 110 / 0.07), rgb(122 31 168 / 0.05) 55%, rgb(43 180 214 / 0.07));
  --site-velvet-edge: linear-gradient(100deg, #150626 0%, #3b0b6e 18%, #9a5fd0 34%, #26104a 50%, #16256b 72%, #7a4ab8 88%, #150626 100%);
  --site-velvet-line: #26104a;
  --site-velvet-glow: 0 8px 24px -16px rgb(21 6 38 / 0.5);

  --site-hover-bg: #1f0c3d;
  --site-hover-fg: #ffffff;
  --site-hover-border: #9a5fd0;

  --site-accent: hsl(234, 90%, 60%);
  --site-accent-hover: hsl(234, 80%, 50%);
  --site-accent-fg: #ffffff;
  --site-focus: hsl(234, 90%, 60%);
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --site-surface: #0f0719;
  --site-surface-sunk: #0a0412;
  --site-brand: #ffffff;
  --site-text: hsl(262, 12%, 70%);
  --site-text-strong: hsl(270, 30%, 96%);
  --site-text-weak: hsl(262, 8%, 56%);
  --site-hairline: rgb(168 120 214 / 0.18);

  --site-glass-fill: rgb(28 14 46 / 0.62);
  --site-glass-shadow: 0 1px 2px rgb(0 0 0 / 0.5), 0 16px 40px -20px rgb(0 0 0 / 0.8);
  --site-sheen-soft: linear-gradient(135deg, rgb(122 31 168 / 0.26), rgb(59 11 110 / 0.18) 55%, rgb(43 180 214 / 0.14));
  --site-velvet-edge: linear-gradient(100deg, #2a1150 0%, #6b2fa8 18%, #d8bcff 34%, #3d1270 50%, #2bb4d6 72%, #a878d6 88%, #2a1150 100%);
  --site-velvet-line: #6b2fa8;
  --site-velvet-glow: 0 12px 34px -18px rgb(122 31 168 / 0.55);

  --site-hover-bg: #f2eaff;
  --site-hover-fg: #150a26;
  --site-hover-border: #7a1fa8;

  --site-accent: hsl(234, 100%, 76%);
  --site-accent-hover: hsl(234, 100%, 84%);
  --site-accent-fg: #0f0719;
  --site-focus: hsl(234, 100%, 76%);
}

html {
  background: var(--site-surface);
}

/* A theme switch cross-fades as one image instead of every surface transitioning on its own. */
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.28s;
}

[data-component="site"] {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

[data-component="site-main"] {
  flex: 1 0 auto;
  padding-top: var(--site-header-h);
  outline: none;
}

[data-component="skip-link"] {
  position: fixed;
  top: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 60;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  background: var(--site-hover-bg);
  color: var(--site-hover-fg);
  font: 500 0.875rem/1.2 var(--site-font);
  text-decoration: none;
  transform: translateY(-200%);
}

[data-component="skip-link"]:focus-visible {
  transform: none;
}

/* --- header --------------------------------------------------------------------------------- */

[data-component="site-header"] {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--site-header-h);
  font-family: var(--site-font);
  font-size: 0.875rem;
  line-height: 1;
  color: var(--site-text);
  background: var(--site-glass-fill);
  backdrop-filter: var(--site-glass-blur);
  -webkit-backdrop-filter: var(--site-glass-blur);
  border-end-start-radius: var(--site-radius);
  border-end-end-radius: var(--site-radius);
  box-shadow: var(--site-glass-shadow), var(--site-velvet-glow);

  a,
  button {
    font: inherit;
    color: inherit;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
  }

  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--site-focus);
    outline-offset: 2px;
  }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  [data-component="site-header"] {
    background: var(--site-surface);
  }
}

/* The velvet edge: a gradient ring masked out of the border box, so the sheen follows the corners. */
@supports ((mask-composite: exclude) or (-webkit-mask-composite: xor)) {
  [data-component="site-header"]::after,
  [data-component="site-header"] [data-slot="rail"]::before,
  [data-component="theme-toggle"]::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    padding: var(--site-edge-w);
    background: var(--site-velvet-edge);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
  }

  [data-component="site-header"]::after {
    z-index: 1;
  }
}

@supports not ((mask-composite: exclude) or (-webkit-mask-composite: xor)) {
  [data-component="site-header"] {
    border-bottom: var(--site-edge-w) solid var(--site-velvet-line);
  }
}

/* The bar's contents share the pages' 1200px column, so on a wide screen the logo and the actions
   line up with the content below instead of drifting to the far edges. */
[data-component="site-header"] [data-slot="bar"] {
  box-sizing: border-box;
  height: 100%;
  max-width: calc(75rem + 3rem);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-inline: 1.5rem;
}

[data-component="site-header"] [data-slot="brand"] {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  height: 40px;
  padding: 4px 6px;
  margin-inline-start: -6px;
  border-radius: 10px;
  color: var(--site-brand);
}

[data-component="brand-mark"] {
  display: block;
  height: 30px;
  width: auto;
  aspect-ratio: 4 / 1;
}

/* The navigation tray: the rail the docs header uses, square where it meets the bar, round below. */
[data-component="site-header"] [data-slot="rail"] {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: 2px;
  height: 2.25rem;
  padding: 3px;
  margin-inline-start: auto;
  border-radius: 6px 6px 12px 12px;
  background: var(--site-sheen-soft);
  box-shadow: inset 0 0 0 var(--site-edge-w) var(--site-velvet-line), var(--site-glass-shadow);
}

[data-component="site-header"] [data-slot="link"] {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0 0.8rem;
  border: 1px solid transparent;
  border-radius: 3px 3px 9px 9px;
  color: var(--site-text);
  font-size: 0.9375rem;
  white-space: nowrap;
  transition:
    background-color 0.18s ease,
    color 0.18s ease,
    border-color 0.18s ease;
}

/* The underline grows from the centre, the same response the docs rail gives. */
[data-component="site-header"] [data-slot="link"]::after {
  content: "";
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--site-hover-border);
  transition:
    left 0.22s ease,
    right 0.22s ease;
}

[data-component="site-header"] [data-slot="link"][aria-current="page"] {
  color: var(--site-text-strong);
  font-weight: 600;
}

[data-component="site-header"] [data-slot="link"][aria-current="page"]::after,
[data-component="site-header"] [data-slot="link"]:hover::after,
[data-component="site-header"] [data-slot="link"]:focus-visible::after {
  left: 0.8rem;
  right: 0.8rem;
}

[data-component="site-header"] [data-slot="link"]:hover,
[data-component="site-header"] [data-slot="link"]:focus-visible {
  background: var(--site-hover-bg);
  color: var(--site-hover-fg);
  border-color: var(--site-hover-border);
}

[data-component="site-header"] [data-slot="actions"] {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* --- theme toggle --------------------------------------------------------------------------- */

[data-component="theme-toggle"] {
  position: relative;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 0;
  border-radius: 6px 6px 12px 12px;
  background: var(--site-sheen-soft);
  color: var(--site-text-strong);
  cursor: pointer;
  box-shadow: inset 0 0 0 var(--site-edge-w) var(--site-velvet-line), var(--site-glass-shadow);
  transition:
    background-color 0.18s ease,
    color 0.18s ease;

  svg {
    overflow: visible;
  }

  [data-slot="body"],
  [data-slot="bite"] {
    transform-box: view-box;
    transform-origin: 12px 12px;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  }

  [data-slot="rays"] {
    transform-box: view-box;
    transform-origin: 12px 12px;
    transition:
      transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
      opacity 0.3s ease;
  }
}

[data-component="theme-toggle"]:hover,
[data-component="theme-toggle"]:focus-visible {
  background: var(--site-hover-bg);
  color: var(--site-hover-fg);
}

[data-component="theme-toggle"]:hover::before,
[data-component="theme-toggle"]:focus-visible::before {
  background: var(--site-hover-border);
}

/* Dark: the disc grows, a bite slides in to carve the crescent, and the rays turn away. */
:root[data-theme="dark"] [data-component="theme-toggle"] {
  [data-slot="body"] {
    transform: scale(1.7);
  }

  [data-slot="bite"] {
    transform: translate(-7.5px, 3.5px);
  }

  [data-slot="rays"] {
    opacity: 0;
    transform: rotate(-90deg) scale(0.4);
  }
}

/* --- account -------------------------------------------------------------------------------- */

[data-component="site-header"] [data-slot="account"] {
  position: relative;
  display: flex;
  align-items: center;
}

[data-component="site-header"] [data-slot="account"][data-status="loading"] [data-slot="sign-in"] {
  visibility: hidden;
}

[data-component="site-header"] [data-slot="sign-in"] {
  padding: 0.5rem 0.6rem;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--site-text-strong);
  white-space: nowrap;
}

[data-component="site-header"] [data-slot="sign-in"]:hover,
[data-component="site-header"] [data-slot="sign-in"]:focus-visible {
  background: var(--site-hover-bg);
  color: var(--site-hover-fg);
  border-color: var(--site-hover-border);
}

[data-component="site-header"] [data-slot="avatar"] {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b0b6e 0%, #7a1fa8 55%, #2bb4d6 140%);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
}

[data-component="site-header"] [data-slot="account-menu"] {
  position: absolute;
  top: calc(100% + 10px);
  inset-inline-end: 0;
  min-width: 15rem;
  max-width: min(20rem, calc(100vw - 2rem));
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-radius: 8px 8px 16px 16px;
  background: var(--site-sheen-soft), var(--site-surface);
  box-shadow: inset 0 0 0 1px var(--site-hairline), var(--site-glass-shadow), var(--site-velvet-glow);
  animation: site-pop 0.18s cubic-bezier(0.22, 1, 0.36, 1);

  [data-slot="identity"] {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px 12px 12px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--site-hairline);
    line-height: 1.3;
    overflow-wrap: anywhere;

    strong {
      color: var(--site-text-strong);
      font-weight: 600;
    }

    span {
      color: var(--site-text-weak);
      font-size: 0.8125rem;
    }
  }

  a,
  button {
    display: block;
    width: 100%;
    padding: 10px 12px;
    border: 0;
    border-radius: 6px 6px 10px 10px;
    background: transparent;
    color: var(--site-text-strong);
    text-align: start;
    cursor: pointer;
  }

  a:hover,
  a:focus-visible,
  button:hover,
  button:focus-visible {
    background: var(--site-hover-bg);
    color: var(--site-hover-fg);
  }
}

/* --- call to action ------------------------------------------------------------------------- */

[data-component="site-header"] [data-slot="cta"],
[data-component="site-header"] [data-slot="menu-cta"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  background: var(--site-accent);
  color: var(--site-accent-fg);
  font-weight: 600;
  white-space: nowrap;
  transition: background-color 0.18s ease;
}

[data-component="site-header"] [data-slot="cta"]:hover,
[data-component="site-header"] [data-slot="menu-cta"]:hover {
  background: var(--site-accent-hover);
}

/* --- mobile --------------------------------------------------------------------------------- */

[data-component="site-header"] [data-slot="menu-toggle"] {
  display: none;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--site-hairline);
  border-radius: 6px 6px 12px 12px;
  background: transparent;
  color: var(--site-text-strong);
  cursor: pointer;

  path {
    transform-origin: 12px 12px;
    transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
  }
}

[data-component="site-header"][data-menu="open"] [data-slot="menu-toggle"] {
  [data-slot="top"] {
    transform: translateY(4px) rotate(45deg);
  }

  [data-slot="bottom"] {
    transform: translateY(-4px) rotate(-45deg);
  }
}

[data-component="site-header"] [data-slot="menu"] {
  position: fixed;
  top: calc(var(--site-header-h) + 8px);
  inset-inline: 0.75rem;
  max-height: calc(100dvh - var(--site-header-h) - 24px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px;
  border-radius: 10px 10px 20px 20px;
  background: var(--site-sheen-soft), var(--site-surface);
  box-shadow: inset 0 0 0 1px var(--site-hairline), var(--site-glass-shadow), var(--site-velvet-glow);
  animation: site-pop 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  font-size: 1rem;

  [data-slot="menu-link"] {
    display: block;
    width: 100%;
    padding: 14px 14px;
    border: 0;
    border-radius: 6px 6px 12px 12px;
    background: transparent;
    color: var(--site-text-strong);
    text-align: start;
    cursor: pointer;
  }

  [data-slot="menu-link"][aria-current="page"] {
    font-weight: 600;
    box-shadow: inset 3px 0 0 var(--site-hover-border);
  }

  [data-slot="menu-link"]:hover,
  [data-slot="menu-link"]:focus-visible {
    background: var(--site-hover-bg);
    color: var(--site-hover-fg);
  }

  [data-slot="menu-actions"] {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 6px;
    padding-top: 10px;
    border-top: 1px solid var(--site-hairline);
  }

  [data-slot="menu-cta"] {
    padding: 14px;
  }
}

:root[data-site-menu="open"] {
  overflow: hidden;
}

@media (max-width: 56rem) {
  [data-component="site-header"] [data-slot="rail"],
  [data-component="site-header"] [data-slot="sign-in"] {
    display: none;
  }

  [data-component="site-header"] [data-slot="menu-toggle"] {
    display: grid;
  }

  [data-component="site-header"] [data-slot="actions"] {
    margin-inline-start: auto;
  }
}

@media (max-width: 30rem) {
  [data-component="site-header"] [data-slot="bar"] {
    padding-inline: 1rem;
    gap: 0.5rem;
  }

  [data-component="site-header"] [data-slot="actions"] {
    gap: 0.5rem;
  }

  [data-component="site-header"] [data-slot="cta"] {
    display: none;
  }

  [data-component="brand-mark"] {
    height: 26px;
  }
}

@keyframes site-pop {
  from {
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
  }
}

/* --- footer --------------------------------------------------------------------------------- */

[data-component="site"] [data-component="site-footer"] {
  margin-top: 4rem;
  border-top: 1px solid var(--site-hairline);
  font-family: var(--site-font);
  font-size: 0.875rem;
  color: var(--site-text);

  [data-slot="links"] {
    box-sizing: border-box;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.25rem 0.5rem;
    max-width: calc(75rem + 3rem);
    margin: 0 auto;
    padding: 2rem 1.5rem 1rem;
  }

  [data-slot="links"] a {
    padding: 0.55rem 0.8rem;
    border: 1px solid transparent;
    border-radius: 6px 6px 12px 12px;
    color: var(--site-text-strong);
    text-decoration: none;
  }

  [data-slot="links"] a:hover,
  [data-slot="links"] a:focus-visible {
    background: var(--site-hover-bg);
    color: var(--site-hover-fg);
    border-color: var(--site-hover-border);
  }

  [data-component="legal"] {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem 2rem;
    padding: 1rem 1.5rem 2.5rem;
    color: var(--site-text-weak);
    text-align: center;
  }

  [data-component="legal"] a {
    color: var(--site-text-weak);
    text-decoration: none;
  }

  [data-component="legal"] a:hover {
    color: var(--site-text-strong);
    text-decoration: underline;
    text-underline-offset: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-component="site-header"] *,
  [data-component="site-header"] *::after,
  [data-component="theme-toggle"] *,
  [data-component="site-footer"] * {
    transition: none !important;
    animation: none !important;
  }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation: none;
  }
}