/* checkout402 docs — three columns, brand palette, no framework.
   Black, white, and Sea green (#2dd4bf). Nothing else carries a hue. */

@font-face { font-family: "Inter"; font-style: normal; font-weight: 100 900;
  font-display: swap; src: url("/static/fonts/inter-latin-var.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 300 700;
  font-display: swap; src: url("/static/fonts/space-grotesk-latin-var.woff2") format("woff2"); }

:root {
  color-scheme: dark;
  --bg: #0a0a0b; --surface: #101012; --surface-2: #16161a;
  --border: #262630; --border-strong: #36363f;
  --text: #ffffff; --text-2: #cbd0d8; --text-3: #8e9ba0;
  --accent: #2dd4bf; --accent-2: #5eead4; --accent-bg: rgba(45,212,191,0.12);
  --code-bg: #0d0d0f;
  --sidebar-w: 250px; --toc-w: 200px;
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff; --surface: #f6f7f9; --surface-2: #f1f3f6;
  --border: #e2e5ea; --border-strong: #cbd0d8;
  --text: #0a0a0b; --text-2: #3a4248; --text-3: #5d6670;
  --accent: #0d9488; --accent-2: #14b8a6; --accent-bg: rgba(45,212,191,0.13);
  --code-bg: #f6f7f9;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #ffffff; --surface: #f6f7f9; --surface-2: #f1f3f6;
    --border: #e2e5ea; --border-strong: #cbd0d8;
    --text: #0a0a0b; --text-2: #3a4248; --text-3: #5d6670;
    --accent: #0d9488; --accent-2: #14b8a6;
    --code-bg: #f6f7f9;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: Inter, system-ui, sans-serif; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: var(--accent); color: #000;
  padding: 8px 14px; z-index: 100; border-radius: 6px; }

/* ------------------------------------------------------------------ topbar */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 22px;
  padding: 0 22px; height: 56px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.wordmark { font-family: "Space Grotesk", sans-serif; font-weight: 700;
  font-size: 17px; color: var(--text); }
.wordmark:hover { text-decoration: none; }
.wordmark .caret { color: var(--accent); }
.topnav { display: flex; gap: 18px; font-size: 14px; margin-right: auto; }
.topnav a { color: var(--text-3); }
.topnav a.on, .topnav a:hover { color: var(--text); text-decoration: none; }
.theme-toggle, .nav-toggle {
  background: transparent; border: 1px solid var(--border-strong);
  color: var(--text-2); border-radius: 7px; padding: 6px 12px;
  font: inherit; font-size: 13px; cursor: pointer;
}
.theme-toggle:hover, .nav-toggle:hover { color: var(--text); }
.nav-toggle { display: none; }

/* ------------------------------------------------------------------- shell */
.shell {
  display: grid; gap: 40px;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  max-width: 1440px; margin: 0 auto; padding: 34px 22px 90px;
}

.sidebar { position: sticky; top: 80px; align-self: start;
  max-height: calc(100vh - 100px); overflow-y: auto; }
.nav-group { margin-bottom: 26px; }
.nav-title {
  font-family: "Space Grotesk", sans-serif; font-size: 11px; font-weight: 600;
  letter-spacing: 0.09em; text-transform: uppercase; color: var(--text-3);
  margin-bottom: 10px;
}
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li a {
  display: block; padding: 6px 12px; margin-left: -12px;
  color: var(--text-2); font-size: 14.5px; border-radius: 7px;
}
.sidebar li a:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.sidebar li a.on {
  color: var(--accent); background: var(--accent-bg); font-weight: 600;
}

/* ------------------------------------------------------------------- prose */
.content { min-width: 0; }
.eyebrow {
  font-family: "Space Grotesk", sans-serif; font-size: 12px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 10px;
}
.prose { max-width: 76ch; }
.prose h1 {
  font-family: "Space Grotesk", sans-serif; font-size: 38px; line-height: 1.15;
  letter-spacing: -0.025em; margin: 0 0 18px;
}
.prose h2 {
  font-family: "Space Grotesk", sans-serif; font-size: 25px; line-height: 1.25;
  letter-spacing: -0.015em; margin: 52px 0 14px;
  padding-top: 20px; border-top: 1px solid var(--border);
}
.prose h3 { font-family: "Space Grotesk", sans-serif; font-size: 18.5px;
  margin: 34px 0 10px; }
.prose p { margin: 0 0 16px; color: var(--text-2); }
.prose strong { color: var(--text); font-weight: 600; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 22px; color: var(--text-2); }
.prose li { margin: 6px 0; }
.prose li::marker { color: var(--text-3); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }
.prose blockquote {
  margin: 20px 0; padding: 2px 0 2px 18px;
  border-left: 3px solid var(--accent); color: var(--text-2);
}
.headerlink { color: var(--text-3); opacity: 0; margin-left: 8px;
  text-decoration: none; font-weight: 400; }
h2:hover .headerlink, h3:hover .headerlink { opacity: 1; }

/* Inline code — distinct from a code BLOCK, which is a slab. */
.prose :not(pre) > code {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 5px; padding: 1.5px 6px; font-size: 0.875em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace; color: var(--text);
}

/* ------------------------------------------------------------------ tables */
.prose table {
  width: 100%; border-collapse: collapse; margin: 0 0 22px; font-size: 14.5px;
  display: block; overflow-x: auto;   /* wide tables scroll, page never does */
}
.prose th {
  text-align: left; font-family: "Space Grotesk", sans-serif; font-size: 12px;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3);
  padding: 9px 14px 9px 0; border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}
.prose td { padding: 11px 14px 11px 0; border-bottom: 1px solid var(--border);
  color: var(--text-2); vertical-align: top; }
.prose td code { white-space: nowrap; }

/* -------------------------------------------------------------- code slabs */
.prose pre {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 9px; padding: 15px 17px; overflow-x: auto;
  margin: 0 0 20px; font-size: 13.2px; line-height: 1.6;
}
.prose pre code { font-family: ui-monospace, "SF Mono", Menlo, monospace;
  background: none; border: 0; padding: 0; color: var(--text-2); }

/* Pygments, mapped onto the brand rather than its default rainbow. Sea green
   carries meaning (strings, names); everything else is a grey step. */
.hl .k, .hl .kd, .hl .kn, .hl .kr, .hl .kt { color: var(--text); font-weight: 600; }
.hl .s, .hl .s1, .hl .s2, .hl .sb, .hl .se, .hl .si { color: var(--accent); }
.hl .c, .hl .c1, .hl .cm, .hl .cp { color: var(--text-3); font-style: italic; }
.hl .nf, .hl .nc, .hl .nn { color: var(--text); }
.hl .mi, .hl .mf, .hl .m { color: var(--accent-2); }
.hl .nt { color: var(--text); }        /* HTML tags */
.hl .na { color: var(--accent); }      /* attributes */
.hl .o, .hl .p { color: var(--text-3); }
.hl .err { color: var(--text); background: none; }  /* never a red box */

/* --------------------------------------------------------- tabs (CodeGroup) */
/* Radio inputs + labels: tab switching with no JavaScript at all, so a code
   group works with scripts blocked and survives a failed asset load. */
.tabbed-set { margin: 0 0 22px; position: relative; }
.tabbed-set > input { position: absolute; opacity: 0; pointer-events: none; }
.tabbed-labels {
  display: flex; gap: 4px; flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}
.tabbed-labels > label {
  padding: 8px 14px; font-size: 13px; font-weight: 600; cursor: pointer;
  color: var(--text-3); border-bottom: 2px solid transparent; margin-bottom: -1px;
  font-family: "Space Grotesk", sans-serif; white-space: nowrap;
}
.tabbed-labels > label:hover { color: var(--text); }
.tabbed-set > input:nth-of-type(1):checked ~ .tabbed-labels > label:nth-child(1),
.tabbed-set > input:nth-of-type(2):checked ~ .tabbed-labels > label:nth-child(2),
.tabbed-set > input:nth-of-type(3):checked ~ .tabbed-labels > label:nth-child(3),
.tabbed-set > input:nth-of-type(4):checked ~ .tabbed-labels > label:nth-child(4),
.tabbed-set > input:nth-of-type(5):checked ~ .tabbed-labels > label:nth-child(5),
.tabbed-set > input:nth-of-type(6):checked ~ .tabbed-labels > label:nth-child(6),
.tabbed-set > input:nth-of-type(7):checked ~ .tabbed-labels > label:nth-child(7),
.tabbed-set > input:nth-of-type(8):checked ~ .tabbed-labels > label:nth-child(8)
{ color: var(--accent); border-bottom-color: var(--accent); }

.tabbed-block { display: none; }
.tabbed-set > input:nth-of-type(1):checked ~ .tabbed-content > .tabbed-block:nth-child(1),
.tabbed-set > input:nth-of-type(2):checked ~ .tabbed-content > .tabbed-block:nth-child(2),
.tabbed-set > input:nth-of-type(3):checked ~ .tabbed-content > .tabbed-block:nth-child(3),
.tabbed-set > input:nth-of-type(4):checked ~ .tabbed-content > .tabbed-block:nth-child(4),
.tabbed-set > input:nth-of-type(5):checked ~ .tabbed-content > .tabbed-block:nth-child(5),
.tabbed-set > input:nth-of-type(6):checked ~ .tabbed-content > .tabbed-block:nth-child(6),
.tabbed-set > input:nth-of-type(7):checked ~ .tabbed-content > .tabbed-block:nth-child(7),
.tabbed-set > input:nth-of-type(8):checked ~ .tabbed-content > .tabbed-block:nth-child(8)
{ display: block; }

/* The slab sits flush under the tab strip. */
.tabbed-content .hl > pre, .tabbed-content > .tabbed-block > pre {
  border-top-left-radius: 0; border-top-right-radius: 0; border-top: 0;
  margin-top: 0;
}

/* -------------------------------------------------------------- admonitions */
.admonition {
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  background: var(--surface); border-radius: 9px;
  padding: 14px 17px; margin: 0 0 22px;
}
.admonition > .admonition-title {
  font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 13.5px;
  color: var(--text); margin: 0 0 6px;
}
.admonition > p:last-child { margin-bottom: 0; }
.admonition.warning, .admonition.danger { border-left-color: #ff5d6c; }
.admonition.warning > .admonition-title,
.admonition.danger > .admonition-title { color: #ff8b95; }
:root[data-theme="light"] .admonition.warning > .admonition-title,
:root[data-theme="light"] .admonition.danger > .admonition-title { color: #b3202c; }

/* ------------------------------------------------------------ on this page */
.onthispage { position: sticky; top: 80px; align-self: start; font-size: 13.5px;
  max-height: calc(100vh - 100px); overflow-y: auto; }
.onthispage ul { list-style: none; margin: 0; padding: 0; }
.onthispage ul ul { padding-left: 12px; }
.onthispage a { display: block; padding: 4px 0; color: var(--text-3); line-height: 1.4; }
.onthispage a:hover { color: var(--text); text-decoration: none; }

/* ------------------------------------------------------------------- pager */
.pager { display: flex; justify-content: space-between; gap: 16px;
  margin: 56px 0 0; padding-top: 22px; border-top: 1px solid var(--border); }
.pager a {
  flex: 0 1 46%; padding: 13px 16px; border: 1px solid var(--border);
  border-radius: 9px; color: var(--text); font-weight: 600;
  font-family: "Space Grotesk", sans-serif; font-size: 14.5px;
}
.pager a:hover { border-color: var(--accent); text-decoration: none; }
.pager .next { text-align: right; margin-left: auto; }
.pager span { display: block; font-family: Inter, sans-serif; font-size: 12px;
  font-weight: 400; color: var(--text-3); margin-bottom: 3px; }
.docfoot { margin-top: 40px; font-size: 13px; color: var(--text-3); }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1100px) {
  .shell { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .onthispage { display: none; }
}
@media (max-width: 820px) {
  .shell { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .nav-toggle { display: inline-block; }
  .topnav { display: none; }
  .sidebar {
    display: none; position: static; max-height: none;
    margin-bottom: 28px; padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
  }
  .sidebar.open { display: block; }
  .prose h1 { font-size: 30px; }
  .pager { flex-direction: column; }
  .pager a { flex: 1 1 auto; }
}