:root {
  color-scheme: light dark;
  --canvas: #f3efe7;
  --card: #fcf9f4;
  --raised: #fffdf9;
  --nested: #ede6dc;
  --ink: #211d1a;
  --secondary: #655e57;
  --tertiary: #736b63;
  --separator: #d8cfc2;
  --brand: #d19b64;
  --brand-ink: #8f5b28;
  --brand-soft: #fbf6f0;
  --on-brand: #17120d;
  --green: #6b7d55;
  --green-soft: #e9eee3;
  --blue-soft: #e5eff5;
  --rose: #b87579;
  --contrast: #211d1a;
  --on-contrast: #f8f3ec;
  --shadow: rgba(58, 45, 31, 0.11);
  --max: 1160px;
  --radius-xl: 44px;
  --radius-lg: 30px;
  --radius-md: 20px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #141210;
    --card: #1d1a17;
    --raised: #26211d;
    --nested: #302a24;
    --ink: #f5f0e9;
    --secondary: #c0b7ad;
    --tertiary: #91887f;
    --separator: #3b342d;
    --brand: #e0a66c;
    --brand-ink: #e0a66c;
    --brand-soft: #30241a;
    --on-brand: #17120d;
    --green: #9caf7d;
    --green-soft: #263024;
    --blue-soft: #18303e;
    --rose: #df8588;
    --contrast: #e5c39f;
    --on-contrast: #211d1a;
    --shadow: rgba(0, 0, 0, 0.34);
  }
}

* { box-sizing: border-box; }
html { scrollbar-gutter: stable; }
.site-page {
  color-scheme: light;
  --canvas: #fcf9f2;
  --card: #fff;
  --raised: #fff;
  --nested: #f4f0e8;
  --ink: #3c352d;
  --secondary: #756a5f;
  --tertiary: #736b63;
  --separator: #e8e2d8;
  --brand: #f4ba50;
  --brand-ink: #5d704b;
  --brand-soft: #fbf6f0;
  --shadow: #44312014;
  --max: 1240px;
}
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 17px;
  line-height: 1.58;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--brand-ink); outline-offset: 4px; }
.skip-link { position: absolute; left: -999px; top: 12px; z-index: 20; padding: 10px 16px; background: var(--ink); color: var(--canvas); border-radius: 10px; }
.skip-link:focus { left: 12px; }

.site-header {
  font-family: var(--rounded);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.58;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(24px) saturate(145%);
  background: color-mix(in srgb, var(--canvas) 84%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--separator) 58%, transparent);
}
.nav { max-width: 1240px; min-height: 68px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); font-weight: 770; letter-spacing: -.025em; text-decoration: none; white-space: nowrap; }
.brand-icon { width: 38px; height: 38px; border-radius: 22%; box-shadow: 0 5px 16px var(--shadow); }
.site-header .brand { font-size: 17px; font-weight: 700; }
.site-header .brand-icon { width: 34px; height: 34px; box-shadow: none; }
.nav-links { display: flex; gap: 24px; margin-left: auto; align-items: center; }
.nav-links a, .lang summary { color: var(--secondary); text-decoration: none; font-size: 15px; font-weight: 610; cursor: pointer; white-space: nowrap; }
.nav-links a:hover, .lang summary:hover { color: var(--ink); }
.site-nav { display: grid; grid-template-columns: auto 1fr auto; }
.site-tabs a { padding: 21px 0 18px; border-bottom: 3px solid transparent; }
.site-tabs a[aria-current] { color: var(--ink); border-bottom-color: var(--brand-ink); }
.lang { position: relative; }
.lang summary { list-style: none; padding: 8px 10px; }
.lang summary::-webkit-details-marker { display: none; }
.lang-menu { position: absolute; right: 0; top: 42px; min-width: 168px; padding: 8px; border: 1px solid var(--separator); border-radius: 16px; background: var(--raised); box-shadow: 0 18px 42px var(--shadow); }
.lang-menu a { display: block; padding: 9px 12px; border-radius: 10px; font-size: 14px; text-decoration: none; }
.lang-menu a:hover, .lang-menu a[aria-current="page"] { color: var(--ink); background: var(--nested); }

main { overflow: clip; }
.eyebrow { margin: 0 0 15px; color: var(--brand-ink); font-size: 13px; font-weight: 760; letter-spacing: .105em; text-transform: uppercase; }
h1 { max-width: 720px; margin: 0; font-size: clamp(48px, 6.2vw, 76px); font-weight: 820; line-height: 1.02; letter-spacing: -.058em; overflow-wrap: anywhere; }
.actions { display: flex; flex-wrap: wrap; gap: 15px; margin-top: 31px; align-items: center; }
.button { display: inline-flex; min-height: 50px; padding: 0 22px; align-items: center; justify-content: center; border-radius: 999px; background: var(--brand); color: var(--on-brand); font-weight: 730; text-decoration: none; box-shadow: 0 10px 24px var(--shadow); }
.button.secondary { background: var(--card); color: var(--ink); border: 1px solid var(--separator); box-shadow: none; }
.text-link { color: var(--secondary); font-size: 15px; font-weight: 660; text-decoration: none; }
.text-link:hover { color: var(--ink); }

.legal-hero h1 { margin: 0 0 17px; font-size: clamp(36px, 4.6vw, 58px); font-weight: 800; line-height: 1.2; letter-spacing: -.045em; overflow-wrap: anywhere; text-wrap: balance; }
.legal-hero > p { margin: 0; color: var(--secondary); font-size: 19px; }

.legal-hero { max-width: 860px; margin: 0 auto; padding: 78px 24px 34px; }
.nfc-summary { margin-top: 28px; padding: 22px; border: 1px solid var(--separator); border-radius: var(--radius-md); background: var(--card); }
.nfc-summary > div { display: flex; justify-content: space-between; gap: 20px; padding: 9px 0; }
.nfc-summary span { color: var(--secondary); }
.nfc-summary p { margin: 12px 0 0; padding-top: 14px; border-top: 1px solid var(--separator); color: var(--secondary); font-size: 15px; }
.nfc-details { margin-top: 14px; padding: 18px 22px; border: 1px solid var(--separator); border-radius: var(--radius-md); background: var(--brand-soft); }
.nfc-details summary { cursor: pointer; font-weight: 700; }
.nfc-details > p { color: var(--secondary); font-size: 14px; }
.nfc-details dl { display: grid; grid-template-columns: minmax(120px, .45fr) minmax(0, 1fr); gap: 8px 18px; margin: 18px 0 0; }
.nfc-details dt { color: var(--secondary); }
.nfc-details dd { margin: 0; overflow-wrap: anywhere; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 22px; color: var(--tertiary); font-size: 14px; }
.article { max-width: 860px; margin: 0 auto; padding: 12px 24px 100px; }
.article section { padding: 27px 0; border-top: 1px solid var(--separator); }
.article h2 { margin: 0 0 12px; font-size: 25px; letter-spacing: -.025em; }
.article p { margin: 10px 0; }
.article ul, .article ol { padding-left: 1.35em; }
.article li { margin: 8px 0; }
.article a { color: var(--brand-ink); text-underline-offset: 3px; }
.guide-hero .eyebrow a { text-decoration: none; }
.guide-hero h1, .guide-article h2 { text-wrap: balance; line-height: 1.2; }
.guide-hero:lang(ko), .guide-article:lang(ko) { word-break: keep-all; }
.guide-hero h1 span { display: block; }
.guide-toc { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.guide-toc a { padding: 8px 14px; border: 1px solid var(--separator); border-radius: 18px; color: var(--secondary); font-size: 14px; text-decoration: none; }
.guide-toc a:hover { background: var(--card); color: var(--ink); }
.guide-article section { scroll-margin-top: 88px; }
.guide-article p, .guide-article li { line-height: 1.85; }
.guide-faq { border-bottom: 1px solid var(--separator); padding: 18px 0; }
.guide-faq:last-child { border-bottom: 0; }
.guide-faq summary { cursor: pointer; font-weight: 650; }
.guide-faq p { color: var(--secondary); }
.product-facts { list-style: none; margin: 22px 0 0; padding: 0; color: var(--secondary); font-size: 14px; }
.product-facts li + li { margin-top: 5px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.feature-grid section { padding: 24px; border: 1px solid var(--separator); border-radius: 24px; background: var(--card); }
.feature-grid h2 { font-size: 23px; text-wrap: pretty; }
.feature-grid p { color: var(--secondary); margin: 0; font-size: 16px; line-height: 1.75; }
.related-guides { margin-top: 32px; }
.related-guides .support-card { padding: 20px; }
.related-guides .support-card strong { font-size: 18px; margin: 0; }
.support-contact { margin-top: 36px; }
.contact-email { font-size: clamp(17px, 3vw, 23px); overflow-wrap: anywhere; }
.support-contact p { color: var(--secondary); font-size: 15px; }
.support-article .guide-faq { padding: 22px 0; }
.support-article .guide-faq summary { font-size: 18px; line-height: 1.6; }
.callout { padding: 22px; border-radius: var(--radius-md); background: var(--brand-soft); border: 1px solid color-mix(in srgb, var(--brand) 38%, transparent); }
.support-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 28px; }
.support-card { display: block; padding: 24px; background: var(--card); border: 1px solid var(--separator); border-radius: var(--radius-md); text-decoration: none; }
.support-card:hover { transform: translateY(-2px); box-shadow: 0 12px 28px var(--shadow); }
.support-card strong { display: block; margin-bottom: 5px; font-size: 21px; }
.support-card span { color: var(--secondary); }

.site-footer { border-top: 1px solid var(--separator); }
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 36px 24px 58px; display: flex; gap: 28px; align-items: flex-start; }
.footer-note { max-width: 520px; color: var(--secondary); font-size: 14px; }
.footer-links { margin-left: auto; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 20px; }
.footer-links a { color: var(--secondary); font-size: 14px; text-decoration: none; }

@media (max-width: 820px) {
  body { font-size: 16px; }
  .nav { min-height: 64px; padding: 0 18px; }
  .brand-icon { width: 36px; height: 36px; }
  .site-header .brand { font-size: 16px; gap: 8px; }
  .site-header .brand-icon { width: 30px; height: 30px; }
  .site-header .lang summary { font-size: 12px; padding: 8px; }
  .nav-links > a { display: none; }
  .site-nav { grid-template-columns: 1fr auto; gap: 0 12px; padding-top: 12px; }
  .site-nav > .lang { justify-self: end; }
  .site-tabs { grid-column: 1 / -1; grid-row: 2; width: 100%; margin: 6px 0 0; gap: 0; }
  .site-nav .site-tabs > a { display: flex; flex: 1; align-items: center; justify-content: center; min-height: 44px; padding: 11px 3px 9px; font-size: clamp(12px, 3.2vw, 14px); text-align: center; white-space: normal; line-height: 1.4; }
  .guide-article section { scroll-margin-top: 130px; }
  h1 { font-size: clamp(43px, 12.7vw, 59px); letter-spacing: -.052em; }
  .legal-hero { padding: 56px 20px 24px; }
  .nfc-details dl { grid-template-columns: 1fr; gap: 2px; }
  .nfc-details dd + dt { margin-top: 10px; }
  .article { padding: 10px 20px 78px; }
  .support-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-inner { padding: 32px 20px 44px; display: block; }
  .footer-links { margin-top: 22px; justify-content: flex-start; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .button, .support-card { transition: transform .18s ease, box-shadow .18s ease; }
  .button:hover { transform: translateY(-1px); box-shadow: 0 13px 28px var(--shadow); }
}

@media print {
  .site-header, .site-footer, .actions { display: none; }
  body { background: white; color: black; font-size: 12pt; }
  .legal-hero, .article { max-width: none; padding-left: 0; padding-right: 0; }
}