:root { --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif; --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif; }
body { font-family: var(--font); background: var(--bg-grouped); color: var(--label); }
.top { position: sticky; top: 0; background: var(--bg-grouped); border-bottom: 1px solid var(--separator); }
.top-in { max-width: 920px; margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
.brand { min-width: 44px; display: flex; align-items: center; gap: 10px; font: 700 19px/24px var(--display); color: var(--label); text-decoration: none; min-height: 44px; }
.nav { display: flex; gap: 4px; }
.nav a { min-height: 44px; min-width: 44px; padding: 0 14px; display: grid; place-items: center; border-radius: 22px; font: 600 15px/20px var(--font); color: var(--label-2); text-decoration: none; }
.nav a[aria-current] { background: var(--fill); color: var(--label); }
main { max-width: 920px; margin: 0 auto; padding: 48px 24px 40px; }
.card { background: var(--surface); border-radius: 24px; padding: 48px 56px; box-shadow: 0 0 0 1px var(--separator); }
h1 { font: 700 40px/48px var(--display); letter-spacing: -0.5px; }
h2 { font: 600 22px/28px var(--display); margin: 36px 0 10px; }
h3 { font: 600 18px/24px var(--display); margin: 26px 0 6px; }
p, li { font: 400 17px/27px var(--font); color: var(--label); }
p { margin: 10px 0; } ul { margin: 10px 0 10px 22px; } li { margin: 4px 0; }
strong { font-weight: 600; } em { color: var(--label-2); font-style: normal; font-size: 15px; }
a { color: var(--link); text-underline-offset: 3px; }
code { font: 500 15px/20px ui-monospace, "SF Mono", Menlo, monospace; background: var(--fill); padding: 1px 6px; border-radius: 6px; }
mark { background: var(--prep-level); color: var(--label); border-radius: 4px; padding: 0 3px; }
hr { border: 0; border-top: 1px solid var(--separator); margin: 36px 0 18px; }
.tw { overflow-x: auto; margin: 14px 0; }
table { border-collapse: collapse; width: 100%; font: 400 15px/22px var(--font); }
th { text-align: left; font-weight: 600; color: var(--label-2); padding: 10px 12px; border-bottom: 1px solid var(--separator); }
td { padding: 10px 12px; border-bottom: 1px solid var(--separator); vertical-align: top; color: var(--label); }
.foot { max-width: 920px; margin: 0 auto; padding: 8px 24px 56px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; color: var(--label-2); font: 400 14px/20px var(--font); }
.foot a { color: var(--link); }
.foot nav { display: flex; gap: 6px; } .foot nav a { min-height: 44px; display: grid; place-items: center; padding: 0 6px; }
@media (max-width: 600px) {
  .top-in { padding: 0 16px; } .brand span { display: none; }
  main { padding: 20px 12px 24px; } .card { padding: 28px 20px; border-radius: 20px; }
  h1 { font-size: 32px; line-height: 38px; } h2 { font-size: 20px; line-height: 25px; margin-top: 28px; }
  p, li { font-size: 16px; line-height: 25px; }
  .tw { overflow: visible; } table, tbody, tr, td { display: block; width: 100%; } thead { display: none; }
  tr { border-bottom: 1px solid var(--separator); padding: 10px 0; } td { border: 0; padding: 2px 0; font-size: 15px; }
  td::before { content: attr(data-l) ": "; color: var(--label-2); font-weight: 600; }
  td:first-child::before { content: none; }
  .foot { padding: 4px 16px 40px; }
}