:root {
  color-scheme: light;
  font-family: Inter, Pretendard, "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #172033;
  background: #f5f7fb;
  font-synthesis: none;
}

* { box-sizing: border-box; }
body { margin: 0; line-height: 1.72; }
a { color: #335eea; text-underline-offset: 3px; }
a:hover { color: #183aa6; }
.skip-link { position: absolute; left: -9999px; top: 0; }
.skip-link:focus { left: 1rem; top: 1rem; z-index: 10; padding: .7rem 1rem; background: #fff; border: 2px solid #335eea; }
.site-header { background: #fff; border-bottom: 1px solid #e3e7ef; }
.header-inner, main, .footer-inner { width: min(1040px, calc(100% - 2rem)); margin: 0 auto; }
.header-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { color: #172033; font-size: 1.25rem; font-weight: 800; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: .35rem 1rem; }
nav a { color: #3f4a5f; font-size: .94rem; text-decoration: none; }
main { padding: 3.5rem 0 4.5rem; }
.eyebrow { margin: 0 0 .4rem; color: #335eea; font-size: .8rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
h1 { max-width: 780px; margin: 0; font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.18; letter-spacing: -.035em; }
.lead { max-width: 760px; margin: 1.2rem 0 0; color: #58647a; font-size: 1.08rem; }
.updated { margin: .75rem 0 0; color: #748097; font-size: .9rem; }
.content-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 2.5rem; }
.card, section { background: #fff; border: 1px solid #e2e7f0; border-radius: 18px; padding: 1.5rem; box-shadow: 0 8px 26px rgba(35, 48, 78, .05); }
.card h2, section h2 { margin: 0 0 .65rem; font-size: 1.25rem; line-height: 1.35; }
.card p, section p { margin: .55rem 0 0; }
.stack { display: grid; gap: 1rem; margin-top: 2.5rem; }
ul, ol { padding-left: 1.3rem; }
li + li { margin-top: .45rem; }
.notice { border-left: 4px solid #335eea; }
.guide-group { margin-top: 2.5rem; }
.guide-group h2 { margin-bottom: 1rem; }
.guide-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; padding: 0; list-style: none; }
.guide-list li { margin: 0; }
.guide-list a { height: 100%; display: block; padding: 1rem 1.1rem; color: #24314c; background: #fff; border: 1px solid #e2e7f0; border-radius: 12px; font-weight: 650; text-decoration: none; }
.guide-list a:hover { border-color: #9aadef; color: #244bc2; transform: translateY(-1px); }
.site-footer { padding: 2rem 0; color: #69758b; background: #fff; border-top: 1px solid #e3e7ef; font-size: .9rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer-links { display: flex; flex-wrap: wrap; gap: .8rem; }
.footer-links a { color: inherit; }
.error-main { min-height: 70vh; display: grid; place-content: center; text-align: center; }
.error-code { margin: 0; color: #335eea; font-size: 5rem; font-weight: 900; line-height: 1; }
.button { display: inline-block; margin-top: 1rem; padding: .75rem 1rem; border-radius: 10px; color: #fff; background: #335eea; font-weight: 700; text-decoration: none; }
.button:hover { color: #fff; background: #244bc2; }
@media (max-width: 700px) {
  .header-inner { align-items: flex-start; flex-direction: column; padding: 1rem 0; }
  .content-grid, .guide-list { grid-template-columns: 1fr; }
  main { padding-top: 2.5rem; }
}