:root {
    --blue: #0061f2;
    --purple: #6900c7;
    --teal: #00ba94;
    --ink: #172b4d;
    --muted: #5e6c84;
    --line: #e6eaf0;
    --soft: #f5f8fc;
    --white: #fff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", Arial, sans-serif; line-height: 1.72; word-break: keep-all; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 100; padding: .75rem 1rem; background: #000; color: #fff; }
.skip-link:focus { left: 1rem; top: 1rem; }
.site-header { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid rgba(230,234,240,.9); background: rgba(255,255,255,.96); backdrop-filter: blur(12px); }
.nav-wrap, .content-wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.nav-wrap { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); font-size: 1.18rem; font-weight: 800; }
.brand:hover { text-decoration: none; }
.brand img { border-radius: 50%; }
nav { display: flex; gap: 22px; margin-left: auto; }
nav a { color: #344563; font-weight: 650; font-size: .95rem; }
.nav-cta, .button { display: inline-flex; justify-content: center; align-items: center; border-radius: 999px; padding: .78rem 1.25rem; background: var(--teal); color: #fff; font-weight: 800; }
.nav-cta:hover, .button:hover { color: #fff; text-decoration: none; transform: translateY(-1px); }
.hero { padding: 78px 0 66px; color: #fff; background: linear-gradient(135deg, var(--blue), var(--purple)); }
.breadcrumbs { margin-bottom: 20px; font-size: .9rem; color: rgba(255,255,255,.78); }
.breadcrumbs a { color: #fff; }
.eyebrow { margin: 0 0 12px; letter-spacing: .1em; font-size: .78rem; font-weight: 850; color: var(--teal); }
.hero .eyebrow { color: #82ffe5; }
.hero h1 { max-width: 860px; margin: 0; font-size: clamp(2.1rem, 5vw, 3.7rem); line-height: 1.22; letter-spacing: -.035em; }
.hero-summary { max-width: 760px; margin: 22px 0 0; font-size: clamp(1.05rem, 2vw, 1.24rem); color: rgba(255,255,255,.88); }
.hero-meta { margin-top: 25px; color: rgba(255,255,255,.7); font-size: .88rem; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 70px; padding: 68px 0 84px; }
.article { min-width: 0; }
.article h2 { margin: 3.2rem 0 1rem; font-size: clamp(1.55rem, 3vw, 2.05rem); line-height: 1.36; letter-spacing: -.02em; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin: 2rem 0 .7rem; font-size: 1.24rem; }
.article p, .article li { color: #344563; }
.article ul, .article ol { padding-left: 1.35rem; }
.article li + li { margin-top: .55rem; }
.lead-box, .note, .checklist, .answer { border: 1px solid var(--line); border-radius: 18px; padding: 24px 26px; background: var(--soft); }
.lead-box { margin-bottom: 34px; border-left: 5px solid var(--teal); }
.note { margin: 28px 0; background: #fffaf0; border-color: #ffe2a8; }
.checklist { margin: 24px 0; }
.checklist li::marker { color: var(--teal); }
.table-wrap { overflow-x: auto; margin: 24px 0 34px; border: 1px solid var(--line); border-radius: 16px; }
table { width: 100%; min-width: 640px; border-collapse: collapse; background: #fff; }
th, td { padding: 15px 17px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--soft); color: var(--ink); }
tr:last-child td { border-bottom: 0; }
.faq { margin-top: 42px; }
.answer { margin: 15px 0; background: #fff; }
.answer h3 { margin-top: 0; }
.sidebar { align-self: start; position: sticky; top: 100px; }
.side-card { border: 1px solid var(--line); border-radius: 18px; padding: 23px; box-shadow: 0 12px 34px rgba(23,43,77,.07); }
.side-card h2 { margin: 0 0 13px; font-size: 1.2rem; }
.side-card ul { margin: 0; padding: 0; list-style: none; }
.side-card li + li { border-top: 1px solid var(--line); }
.side-card a { display: block; padding: 11px 0; color: #344563; font-weight: 650; }
.side-card .button { margin-top: 18px; color: #fff; text-align: center; }
.related { padding: 72px 0; background: var(--soft); }
.related h2 { margin: 0 0 25px; font-size: 2rem; }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.related-grid a { min-height: 126px; display: flex; flex-direction: column; justify-content: center; gap: 8px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; color: var(--ink); box-shadow: 0 8px 24px rgba(23,43,77,.05); }
.related-grid a:hover { text-decoration: none; border-color: #b9c9e5; transform: translateY(-2px); }
.related-grid strong { font-size: 1.08rem; }
.related-grid span { color: var(--muted); }
.final-cta { padding: 78px 0; text-align: center; color: #fff; background: linear-gradient(135deg, #0061f2, rgba(105,0,199,.9)); }
.final-cta h2 { max-width: 760px; margin: 0 auto 14px; font-size: clamp(1.8rem, 4vw, 2.65rem); }
.final-cta p:not(.eyebrow) { color: rgba(255,255,255,.84); }
.button-light { margin-top: 14px; background: #fff; color: var(--blue); }
.button-light:hover { color: var(--purple); }
.site-footer { padding: 38px 0; color: rgba(255,255,255,.82); background: #102a43; }
.footer-grid { display: grid; grid-template-columns: 1fr 1.7fr; gap: 40px; }
.site-footer p { margin: 7px 0 0; }
@media (max-width: 860px) {
    .nav-wrap { min-height: 64px; }
    nav { display: none; }
    .nav-cta { margin-left: auto; padding: .65rem 1rem; }
    .hero { padding: 58px 0 52px; }
    .article-layout { grid-template-columns: 1fr; gap: 42px; padding-top: 50px; }
    .sidebar { position: static; }
}
@media (max-width: 620px) {
    .nav-wrap, .content-wrap { width: min(100% - 28px, 1120px); }
    .brand span { font-size: 1rem; }
    .related-grid, .footer-grid { grid-template-columns: 1fr; }
    .article h2 { margin-top: 2.5rem; }
    .lead-box, .note, .checklist, .answer { padding: 20px; }
}