*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
:root {
  --bg: #fff;
  --subtle: #f8f7fb;
  --muted: #f1f0f5;
  --ink: #111114;
  --soft: #4a4754;
  --quiet: #797687;
  --grape: #6d28d9;
  --grape-dark: #5b21b6;
  --border: #e4e3ea;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
body {
  color: var(--ink); background: var(--bg); line-height: 1.65;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body[lang="ko"] { font-family: "Apple SD Gothic Neo", -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif; word-break: keep-all; }
a { color: inherit; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.96); }
.header-inner { max-width: 1120px; height: 56px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.brand, .nav { display: flex; align-items: center; gap: 10px; }
.brand { font-size: .94rem; font-weight: 650; }
.brand img { width: 22px; height: 22px; border-radius: 5px; }
.nav { gap: 18px; font-size: .83rem; font-weight: 550; }
.nav a:hover, .text-link:hover { color: var(--grape); }
.download { padding: 6px 12px; border-radius: 8px; background: var(--grape); color: #fff !important; }
.download:hover { background: var(--grape-dark); }
.page { max-width: 1120px; margin: 0 auto; padding: 56px 24px 84px; display: grid; grid-template-columns: 210px minmax(0, 760px); gap: 56px; }
.toc { position: sticky; top: 88px; height: fit-content; border-left: 1px solid var(--border); padding-left: 16px; }
.toc strong { display: block; margin-bottom: 12px; color: var(--quiet); font: 650 .73rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.toc ul { list-style: none; display: grid; gap: 9px; font-size: .84rem; color: var(--soft); }
.toc a:hover { color: var(--grape); }
.eyebrow { margin-bottom: 10px; color: var(--grape); font: 700 .73rem/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
h1 { max-width: 690px; font-size: clamp(2.05rem, 4.5vw, 3rem); line-height: 1.12; letter-spacing: -.04em; }
.meta { margin-top: 14px; color: var(--quiet); font: .8rem/1.5 var(--mono); }
.lead { margin: 28px 0 32px; color: var(--soft); font-size: 1.08rem; }
.lead span { display: block; }
.hero-image { margin: 0 0 48px; overflow: hidden; border: 1px solid var(--border); border-radius: 12px; background: var(--subtle); }
.hero-image img { display: block; width: 100%; height: auto; }
.hero-image figcaption { border-top: 1px solid var(--border); padding: 9px 14px; color: var(--quiet); font-size: .78rem; background: #fff; }
.section { margin: 0 0 48px; }
.section h2 { margin-bottom: 14px; font-size: 1.48rem; line-height: 1.3; letter-spacing: -.025em; }
.section h3 { margin: 24px 0 7px; font-size: 1.03rem; }
.section p { margin-bottom: 14px; color: var(--soft); font-size: .95rem; }
code { padding: 2px 5px; border-radius: 4px; background: var(--muted); font: .88em/1.4 var(--mono); color: var(--ink); }
.steps { list-style: none; margin-top: 22px; counter-reset: steps; }
.steps li { position: relative; margin: 0 0 26px; padding-left: 42px; color: var(--soft); font-size: .94rem; }
.steps li::before { counter-increment: steps; content: counter(steps); position: absolute; left: 0; top: -1px; width: 28px; height: 28px; display: grid; place-items: center; border: 2px solid var(--grape); border-radius: 50%; color: var(--grape); font: 700 .78rem/1 var(--mono); }
.steps strong { display: block; margin-bottom: 4px; color: var(--ink); font-size: 1rem; }
.mapping { width: 100%; border-collapse: collapse; margin-top: 18px; font-size: .9rem; }
.mapping th, .mapping td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.mapping th { color: var(--quiet); font-size: .76rem; letter-spacing: .04em; text-transform: uppercase; }
.mapping td { color: var(--soft); }
.note { margin: 20px 0; padding: 16px 18px; border: 1px solid var(--border); border-radius: 10px; background: var(--subtle); color: var(--soft); font-size: .91rem; }
.plain-list { padding-left: 20px; color: var(--soft); font-size: .94rem; }
.plain-list li { margin-bottom: 9px; }
.related { margin-top: 54px; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--subtle); }
.related h2 { font-size: 1.1rem; margin-bottom: 7px; }
.related p { color: var(--soft); font-size: .9rem; }
.text-link { color: var(--grape); font-weight: 650; }
.footer { margin-top: 52px; padding-top: 22px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--quiet); font-size: .8rem; }
@media (max-width: 820px) {
  .page { grid-template-columns: 1fr; gap: 28px; padding-top: 28px; }
  .toc { position: static; border-left: 0; border-bottom: 1px solid var(--border); padding: 0 0 18px; }
  .toc ul { display: flex; flex-wrap: wrap; gap: 8px 16px; }
  .nav > a:first-child { display: none; }
  .mapping { font-size: .82rem; }
  .mapping th, .mapping td { padding: 10px 8px; }
}