@font-face { font-family: Pretendard; src: url('/font/Pretendard-Regular.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: Pretendard; src: url('/font/Pretendard-Bold.woff2') format('woff2'); font-weight: 700; font-display: swap; }
:root {
  color-scheme: light;
  --bg: #fbfbfb; --text: #242726; --muted: #555e5b; --border: #dfe5e3;
  --surface: #f0f5f3; --link: #315e54; --accent: #436f65; --selected: #d0e6df;
  font-family: Pretendard, system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Microsoft YaHei", sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.8; overflow-wrap: anywhere;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101413; --text: #edf3f0; --muted: #b1c0ba; --border: #34443d;
  --surface: #1a2520; --link: #a0d8c5; --accent: #a0d8c5; --selected: #344f44;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #101413; --text: #edf3f0; --muted: #b1c0ba; --border: #34443d;
    --surface: #1a2520; --link: #a0d8c5; --accent: #a0d8c5; --selected: #344f44;
  }
}
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 960px; margin: auto; padding: 40px 24px 72px; }
.topbar { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; font-weight: 700; }
.brand img { width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0; }
.controls { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.theme-control { display: none; }
html.js .theme-control { display: flex; padding: 3px; border: 1px solid var(--border); background: var(--surface); border-radius: 9px; }
button { font: inherit; }
.theme-control button { display: grid; place-items: center; width: 38px; height: 36px; padding: 0; border: 0; border-radius: 6px; background: transparent; color: var(--muted); cursor: pointer; }
.theme-control button[aria-pressed="true"] { color: var(--text); background: var(--selected); }
.theme-control button:hover { color: var(--text); }
.language-control { position: relative; font-size: 14px; }
.language-control summary { display: flex; align-items: center; gap: 10px; min-width: 158px; height: 44px; padding: 0 11px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--text); cursor: pointer; list-style: none; user-select: none; }
.language-control summary::-webkit-details-marker { display: none; }
.language-symbol { display: grid; place-items: center; width: 28px; height: 28px; flex-shrink: 0; border-radius: 6px; color: var(--link); background: var(--selected); }
.language-caption { display: flex; flex-direction: column; gap: 2px; line-height: 1.2; white-space: nowrap; }
.language-label { font-size: 10px; color: var(--muted); }
.language-name { font-size: 13px; font-weight: 700; }
.language-control summary:hover, .language-control[open] summary { border-color: var(--accent); }
.language-chevron { margin-left: auto; color: var(--muted); transition: transform 150ms ease; }
.language-control[open] .language-chevron { transform: rotate(180deg); }
.language-menu { position: absolute; z-index: 10; top: calc(100% + 8px); right: 0; width: 196px; max-width: calc(100vw - 40px); padding: 6px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); box-shadow: 0 14px 36px rgba(0, 0, 0, .18); }
.language-menu a { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 42px; padding: 8px 12px; border-radius: 7px; color: var(--text); text-decoration: none; white-space: nowrap; }
.language-menu a:hover, .language-menu a:focus-visible { background: var(--selected); }
.language-menu a[aria-current="page"] { color: var(--link); background: var(--selected); font-weight: 700; }
.language-check { flex-shrink: 0; }
.language-menu a:focus-visible { outline-offset: -2px; }
@media (prefers-reduced-motion: reduce) { .language-chevron { transition: none; } }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.language-fallback { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 16px; }
header { padding: 32px 0; border-bottom: 1px solid var(--border); }
.eyebrow { color: var(--accent); font-size: 14px; margin: 0 0 8px; }
h1 { font-size: clamp(28px, 5vw, 38px); line-height: 1.35; margin: 0 0 16px; letter-spacing: -.035em; }
.intro { margin: 0 0 20px; color: var(--muted); }
.meta { display: flex; flex-wrap: wrap; gap: 8px 24px; font-size: 14px; color: var(--muted); margin: 0; }
.toc { margin: 32px 0 40px; padding: 24px; background: var(--surface); border-radius: 12px; }
.toc h2 { font-size: 16px; margin: 0 0 12px; }
.contents { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 20px; font-size: 14px; }
a { color: var(--link); text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
:is(a, button, summary):focus-visible { outline: 2px solid var(--link); outline-offset: 4px; }
article > h2 { font-size: 21px; line-height: 1.5; margin: 36px 0 16px; letter-spacing: -.025em; scroll-margin-top: 24px; }
p { margin: 12px 0; }
ol, ul { padding-left: 24px; margin: 12px 0; }
li { padding-left: 4px; margin: 10px 0; }
footer { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }
.links { display: flex; flex-wrap: wrap; gap: 12px 24px; }
@media (max-width: 600px) {
  main { padding: 24px 20px 48px; }
  .toc { padding: 20px; }
  .contents { grid-template-columns: 1fr; }
  article > h2 { font-size: 19px; }
}
@media print {
  :root, :root[data-theme] { --bg: white; --text: black; --muted: #333; --border: #aaa; --link: black; color-scheme: light; }
  main { max-width: none; padding: 0; }
  .toc, .controls, .language-fallback { display: none; }
  article > h2 { break-after: avoid; }
}