:root {
  --ink: #131A2E;
  --muted: #626873;
  --blue: #3559D6;
  --paper: #F2F2F0;
  --line: #E1E3E8;
  --gold: #C39A4A;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 4px; }
a:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 5px;
}
.wrap { width: min(1240px, calc(100% - 64px)); margin-inline: auto; }
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .97);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}
.brand { display: flex; align-items: center; gap: 12px; flex: none; }
.brand-name { display: block; font-size: 21px; line-height: 1.2; font-weight: 800; letter-spacing: -.04em; }
.brand-caption { display: block; margin-top: 3px; font-size: 10px; color: #765819; letter-spacing: .06em; }
.nav { display: flex; align-items: center; gap: 26px; font-size: 14px; font-weight: 600; }
.nav-secondary { white-space: nowrap; }
.nav-cta { background: var(--ink); color: #fff; padding: 10px 18px; white-space: nowrap; }
.breadcrumbs { padding-block: 28px; font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 9px; }
.footer { margin-top: 56px; border-top: 1px solid var(--line); padding: 36px 0 44px; font-size: 13px; color: var(--muted); }
.footer p { margin: 6px 0; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 22px; }

.guide-skip-link {
  position: fixed;
  z-index: 30;
  left: 18px;
  top: 12px;
  transform: translateY(-180%);
  padding: 12px 18px;
  background: var(--ink);
  color: #fff;
}
.guide-skip-link:focus { transform: translateY(0); }
.guide-article { width: 100%; max-width: 840px; margin-inline: auto; }
.guide-heading { padding: 32px 0 30px; border-top: 3px solid var(--blue); }
.guide-eyebrow { margin: 0 0 18px; color: var(--blue); font-size: 12px; font-weight: 750; letter-spacing: .07em; }
.guide-heading h1 { max-width: 19em; margin: 0; font-size: clamp(32px, 4vw, 46px); line-height: 1.28; font-weight: 800; letter-spacing: -.05em; text-wrap: balance; }
.guide-intro { margin: 22px 0 0; color: var(--muted); font-size: 19px; line-height: 1.8; letter-spacing: -.02em; }
.guide-meta { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-top: 20px; color: var(--muted); font-size: 13px; }
.guide-summary { margin: 4px 0 30px; padding: 27px 30px; background: #EDF1FF; border-left: 4px solid var(--blue); }
.guide-summary h2 { margin: 0 0 9px; color: var(--blue); font-size: 14px; letter-spacing: -.01em; }
.guide-summary p { margin: 0; font-size: 19px; line-height: 1.8; font-weight: 650; letter-spacing: -.025em; }
.guide-toc { margin: 0 0 42px; padding: 22px 26px; border: 1px solid var(--line); }
.guide-toc p { margin: 0 0 12px; font-size: 13px; color: var(--muted); font-weight: 700; }
.guide-toc ol { margin: 0; padding-left: 22px; font-size: 14px; }
.guide-toc li + li { margin-top: 7px; }
.guide-toc a:hover { color: var(--blue); }
.guide-section { margin-top: 46px; }
.guide-section + .guide-section { padding-top: 32px; border-top: 1px solid var(--line); }
.guide-section h2 { margin: 0 0 20px; font-size: clamp(24px, 2.7vw, 29px); line-height: 1.45; letter-spacing: -.04em; }
.guide-section h3 { margin: 26px 0 12px; font-size: 20px; line-height: 1.5; letter-spacing: -.03em; }
.guide-section p { margin: 0 0 18px; font-size: 16px; line-height: 1.95; }
.guide-section li { font-size: 16px; line-height: 1.9; }
.guide-section ul, .guide-section ol { padding-left: 23px; }
.guide-section li + li { margin-top: 8px; }
.guide-note { margin: 22px 0; padding: 18px 21px; background: var(--paper); color: #515864; font-size: 14px; line-height: 1.85; }
.guide-section .guide-note { font-size: 14px; }
.guide-source-inline { font-size: 13px; color: var(--muted); }
.guide-source-inline a { text-decoration: underline; text-underline-offset: 4px; }
.guide-table-wrap { max-width: 100%; margin: 24px 0 12px; overflow-x: auto; border: 1px solid var(--line); overscroll-behavior-x: contain; }
.guide-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 14px; line-height: 1.8; }
.guide-table caption { padding: 15px 18px; text-align: left; font-size: 14px; font-weight: 750; background: #fff; border-bottom: 1px solid var(--line); }
.guide-table th, .guide-table td { padding: 16px 18px; vertical-align: top; border-bottom: 1px solid var(--line); }
.guide-table thead th { background: var(--paper); font-weight: 700; }
.guide-table tbody th { min-width: 122px; font-weight: 650; }
.guide-table tr:last-child th, .guide-table tr:last-child td { border-bottom: 0; }
.guide-table thead tr:last-child th { border-bottom: 1px solid var(--line); }
.guide-table-wide { min-width: 660px; }
.guide-table-hint { margin: 0 0 22px; font-size: 12px; color: var(--muted); }
.guide-section .guide-table-hint { font-size: 12px; }
.guide-steps { padding: 0 !important; list-style: none; counter-reset: guide-step; }
.guide-steps > li { counter-increment: guide-step; position: relative; padding: 0 0 12px 48px; }
.guide-steps > li + li { margin-top: 18px; }
.guide-steps > li::before { content: counter(guide-step, decimal-leading-zero); position: absolute; left: 0; top: 2px; color: var(--blue); font-size: 14px; font-weight: 800; }
.guide-steps h3 { margin: 0 0 10px; }
.guide-steps p:last-child { margin-bottom: 0; }
.guide-checklist { padding: 0 !important; margin: 0; list-style: none; }
.guide-checklist li { position: relative; padding: 14px 0 14px 28px; border-bottom: 1px solid var(--line); }
.guide-checklist li + li { margin-top: 0; }
.guide-checklist li::before { content: ""; position: absolute; left: 0; top: 23px; width: 11px; height: 11px; border: 1.5px solid var(--blue); }
.guide-checklist li:first-child { border-top: 1px solid var(--line); }
.guide-cta { margin-top: 48px; padding: 32px; background: #E6EFEA; }
.guide-cta h2 { margin: 0 0 14px; font-size: 27px; line-height: 1.4; letter-spacing: -.04em; }
.guide-cta p { margin: 0; color: #35473E; font-size: 16px; line-height: 1.9; }
.guide-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.guide-button { display: inline-flex; align-items: center; justify-content: center; padding: 13px 19px; min-height: 48px; font-size: 14px; font-weight: 750; line-height: 1.5; text-align: center; }
.guide-button-primary { background: var(--ink); color: #fff; }
.guide-button-secondary { background: transparent; border: 1px solid #8F9F96; color: var(--ink); }
.guide-sources { margin-top: 42px; padding-top: 24px; border-top: 1px solid var(--line); }
.guide-sources h2 { margin: 0 0 12px; font-size: 17px; letter-spacing: -.02em; }
.guide-sources p, .guide-sources li { font-size: 13px; line-height: 1.9; color: var(--muted); }
.guide-sources p { margin: 0 0 10px; }
.guide-sources ul { padding-left: 20px; margin: 0; }
.guide-sources li + li { margin-top: 6px; }
.guide-sources a { text-decoration: underline; text-underline-offset: 4px; }
.guide-related { margin-top: 48px; padding-top: 26px; border-top: 2px solid var(--ink); }
.guide-related h2 { margin: 0 0 20px; font-size: 23px; letter-spacing: -.04em; }
.guide-related-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.guide-related-card { display: flex; min-width: 0; flex-direction: column; align-items: flex-start; padding: 25px; background: var(--paper); border: 1px solid transparent; }
.guide-related-card:hover { border-color: #CAD2EE; text-decoration: none; }
.guide-related-card h3 { margin: 0 0 12px; font-size: 18px; line-height: 1.55; letter-spacing: -.025em; }
.guide-related-card:hover h3 { text-decoration: underline; text-underline-offset: 4px; }
.guide-related-card p { margin: 0 0 20px; font-size: 14px; line-height: 1.8; color: var(--muted); }
.guide-related-label { display: block; margin: 0 0 14px; color: var(--blue); font-size: 11px; font-weight: 750; letter-spacing: .04em; }
.guide-related-arrow { display: block; margin-top: auto; color: var(--blue); font-size: 13px; font-weight: 750; }
.guide-back-link { display: inline-block; margin-top: 24px; font-size: 14px; text-decoration: underline; text-underline-offset: 5px; }

@media (max-width: 900px) {
  .nav { gap: 15px; }
  .guide-heading { padding-top: 25px; }
}
@media (max-width: 600px) {
  .wrap { width: calc(100% - 36px); }
  .header-inner { min-height: 66px; gap: 12px; }
  .brand { gap: 9px; }
  .brand-caption { font-size: 9px; }
  .nav .nav-secondary { display: none; }
  .nav-cta { padding: 10px 13px; font-size: 12px; }
  .breadcrumbs { padding-block: 21px; font-size: 12px; gap: 7px; }
  .guide-heading { padding: 24px 0; }
  .guide-heading h1 { font-size: 31px; }
  .guide-intro { font-size: 17px; }
  .guide-meta { margin-top: 16px; font-size: 12px; }
  .guide-summary { padding: 21px; }
  .guide-summary p { font-size: 17px; }
  .guide-toc { padding: 19px 21px; margin-bottom: 32px; }
  .guide-section { margin-top: 34px; }
  .guide-section + .guide-section { padding-top: 25px; }
  .guide-section p, .guide-section li { font-size: 15px; }
  .guide-section h3 { font-size: 18px; }
  .guide-table { font-size: 13px; }
  .guide-table th, .guide-table td { padding: 13px 14px; }
  .guide-table tbody th { min-width: 100px; }
  .guide-steps > li { padding-left: 35px; }
  .guide-note { padding: 16px 18px; }
  .guide-cta { margin-top: 36px; padding: 25px 22px; }
  .guide-cta h2 { font-size: 24px; }
  .guide-cta p { font-size: 15px; }
  .guide-actions { gap: 8px; }
  .guide-button { padding-inline: 15px; }
  .guide-related-grid { grid-template-columns: 1fr; }
  .guide-related-card { padding: 22px; }
  .footer { margin-top: 44px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
@media print {
  .site-header, .guide-skip-link, .guide-toc, .guide-cta, .guide-related, .footer { display: none; }
  .wrap, .guide-article { width: 100%; max-width: none; }
  .guide-heading h1 { font-size: 30px; }
  .guide-table-wrap { overflow: visible; }
  .guide-table-wide { min-width: 0; }
  .guide-section { break-inside: auto; }
  .guide-section h2, .guide-section h3 { break-after: avoid; }
}