:root {
  color-scheme: dark;
  --accent: #1A5CFF;
  --accent-dim: rgba(26, 92, 255, 0.15);
  --bg-base: #0A0A0A;
  --bg-canvas: #050505;
  --bg-surface: #111111;
  --text-primary: #FFFFFF;
  --text-secondary: #A0A0A0;
  --text-muted: rgba(230, 235, 239, 0.55);
  --border: #2A2A2A;
  --link: #6E9BFF;
  --link-hover: #A8C4FF;
  --point: #171C26;
  --point-mark: #6E9BFF;
  --measure: 68ch;
  --wrap: 1140px;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --accent: #1A5CFF;
    --accent-dim: rgba(26, 92, 255, 0.11);
    --bg-base: #F6F7FB;
    --bg-canvas: #FFFFFF;
    --bg-surface: #FFFFFF;
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-muted: #636A78;
    --border: #D7DEE9;
    --link: #1247CC;
    --link-hover: #0B2F8F;
    --point: #EDF1F8;
    --point-mark: #1247CC;
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --accent: #1A5CFF;
  --accent-dim: rgba(26, 92, 255, 0.11);
  --bg-base: #F6F7FB;
  --bg-canvas: #FFFFFF;
  --bg-surface: #FFFFFF;
  --text-primary: #111827;
  --text-secondary: #4B5563;
  --text-muted: #636A78;
  --border: #D7DEE9;
  --link: #1247CC;
  --link-hover: #0B2F8F;
  --point: #EDF1F8;
  --point-mark: #1247CC;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #FFFFFF;
  padding: 12px 20px;
  z-index: 10;
}
.skip:focus { left: 0; }
:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}
.site-head {
  border-bottom: 1px solid var(--border);
  background: var(--bg-canvas);
}
.head-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 16px;
  padding-bottom: 16px;
}
.brand {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-decoration: none;
}
.nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--text-primary); }
.nav a[aria-current="page"] {
  color: var(--text-primary);
  border-bottom-color: var(--accent);
}
.theme-toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.theme-toggle:hover { color: var(--text-primary); border-color: var(--text-muted); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-icon-moon { display: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .theme-icon-sun { display: none; }
  :root:not([data-theme="dark"]) .theme-icon-moon { display: block; }
}
:root[data-theme="light"] .theme-icon-sun { display: none; }
:root[data-theme="light"] .theme-icon-moon { display: block; }
:root[data-theme="dark"] .theme-icon-sun { display: block; }
:root[data-theme="dark"] .theme-icon-moon { display: none; }
.cta {
  background: var(--accent);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 9px 18px;
  border-radius: 8px;
}
.cta:hover { filter: brightness(1.12); }
.crumbs { padding-top: 18px; }
.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--border);
}
.crumbs a { color: var(--text-muted); }
.crumbs a:hover { color: var(--link-hover); }
main {
  padding-top: 32px;
  padding-bottom: 72px;
}
main > p,
main > ul,
main > ol,
main > blockquote,
main > .note { max-width: var(--measure); }
h1,
h2,
h3,
h4 {
  font-family: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont,
    'Segoe UI', Roboto, sans-serif;
}
h1 {
  font-size: clamp(2rem, 4.5vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  max-width: 22ch;
  color: var(--link);
}
h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 56px 0 16px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  max-width: var(--measure);
}
h3 {
  font-size: 1.15rem;
  margin: 36px 0 12px;
  max-width: var(--measure);
}
p { margin: 0 0 18px; }
a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}
a:hover { color: var(--link-hover); }
strong { font-weight: 650; }
ul, ol { margin: 0 0 20px; padding-left: 24px; }
li { margin-bottom: 8px; }
main > ul,
.points {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 8px;
  grid-template-columns: minmax(0, 1fr);
}
main > ul > li,
.points li {
  position: relative;
  margin-bottom: 0;
  border-radius: 10px;
  padding: 8px 16px 8px 36px;
  background: var(--point);
  overflow-wrap: break-word;
}
main > ul > li::before,
.points li::before {
  content: "✦";
  position: absolute;
  left: 14px;
  top: 8px;
  color: var(--point-mark);
}
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}
blockquote {
  margin: 0 0 20px;
  padding-left: 18px;
  border-left: 3px solid var(--accent);
  color: var(--text-secondary);
}
.note {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 0 0 24px;
}
.note p:last-child { margin-bottom: 0; }
table {
  width: 100%;
  max-width: var(--wrap);
  border-collapse: collapse;
  margin: 0 0 28px;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}
th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}
.byline {
  margin: -16px 0 32px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: var(--measure);
}
.faq h2 { max-width: var(--measure); }
.faq h3 {
  margin: 28px 0 10px;
  max-width: var(--measure);
  color: var(--text-primary);
}
.faq p {
  max-width: var(--measure);
  color: var(--text-secondary);
}
.site-foot {
  border-top: 1px solid var(--border);
  background: var(--bg-canvas);
  padding: 48px 0 28px;
}
.foot-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 32px;
}
.foot-col h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin: 0 0 12px;
  padding: 0;
  border: 0;
  max-width: none;
}
.foot-col ul { list-style: none; margin: 0; padding: 0; }
.foot-col li { margin-bottom: 7px; }
.foot-col a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
}
.foot-col a:hover { color: var(--text-primary); text-decoration: underline; }
.foot-legal {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.foot-legal p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: none;
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .head-inner { gap: 12px 14px; }
  .head-inner > nav { order: 3; width: 100%; }
  .cta { order: 2; margin-left: auto; }
  .nav { gap: 8px 16px; font-size: 0.9rem; }
  h2 { margin-top: 40px; }
}