:root { --seo-accent: #66ff00; --seo-ink: #111; --seo-muted: #626262; --seo-line: #dedede; color: var(--seo-ink); font-family: Pretendard, "Noto Sans KR", system-ui, sans-serif; background: #fff; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.75; }
a { color: inherit; }
.seo-header, .seo-main, .seo-footer { width: min(calc(100% - 40px), 760px); max-width: 760px; margin-inline: auto; }
.seo-header { display: flex; align-items: center; justify-content: space-between; padding: 24px 0; border-bottom: 1px solid var(--seo-line); }
.seo-brand { display: inline-flex; gap: 10px; align-items: center; font-weight: 900; text-decoration: none; }
.seo-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--seo-accent); }
.seo-header a:last-child { min-height: 44px; display: inline-flex; align-items: center; font-weight: 800; }
.seo-main { padding: 70px 0 80px; }
.seo-kicker { margin: 0 0 12px; font-size: .78rem; font-weight: 900; letter-spacing: .13em; }
h1 { margin: 0; max-width: 700px; font-size: clamp(2rem, 7vw, 3.8rem); line-height: 1.12; letter-spacing: -.045em; }
.seo-lead { margin: 24px 0 44px; color: var(--seo-muted); font-size: 1.12rem; }
.seo-meta { color: var(--seo-muted); font-size: .9rem; }
section { margin-top: 52px; }
h2 { margin-bottom: 12px; font-size: 1.55rem; letter-spacing: -.025em; }
.formula, .example, .note { padding: 22px; border: 1px solid var(--seo-line); border-radius: 18px; background: #f8f8f8; }
.formula { border-color: var(--seo-ink); box-shadow: 6px 6px 0 var(--seo-accent); font-weight: 900; }
.seo-cta { margin-top: 52px; padding: 28px; border-radius: 22px; background: var(--seo-ink); color: #fff; }
.seo-cta a { min-height: 48px; margin-top: 12px; padding: 0 20px; display: inline-flex; align-items: center; border-radius: 999px; background: var(--seo-accent); color: #000; font-weight: 900; text-decoration: none; }
.related { display: grid; gap: 12px; }
.related a { min-height: 44px; padding: 14px 16px; border: 1px solid var(--seo-line); border-radius: 14px; font-weight: 750; text-decoration: none; }
.affiliate-disclosure { margin: 28px 0; padding: 18px 20px; border: 2px solid var(--seo-ink); border-radius: 16px; background: #f7f7f7; }
.affiliate-disclosure strong { display: block; margin-bottom: 4px; }
.affiliate-disclosure p { margin: 0; color: var(--seo-muted); font-size: .92rem; }
.seo-hero-image { width: 100%; height: auto; display: block; margin: 30px 0 48px; border-radius: 22px; background: #f3f3f3; aspect-ratio: 1200 / 630; object-fit: cover; }
.selection-grid { display: grid; gap: 12px; }
.selection-grid article { padding: 18px 20px; border-left: 5px solid var(--seo-accent); background: #f8f8f8; }
.selection-grid p { margin: 5px 0 0; color: var(--seo-muted); }
.affiliate-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 24px; }
.affiliate-card { position: relative; min-width: 0; padding: 24px; display: flex; flex-direction: column; border: 1px solid var(--seo-line); border-radius: 20px; background: #fff; }
.affiliate-card h3 { margin: 4px 0 14px; font-size: 1.13rem; line-height: 1.45; }
.affiliate-card p { margin: 0 0 12px; color: var(--seo-muted); font-size: .94rem; }
.affiliate-card p strong { color: var(--seo-ink); }
.affiliate-number { color: var(--seo-ink) !important; font-size: .72rem !important; font-weight: 900; letter-spacing: .12em; }
.ad-label { width: fit-content; margin-left: auto; padding: 4px 8px; border-radius: 999px; color: #000; background: var(--seo-accent); font-size: .72rem; font-weight: 900; }
.affiliate-button { min-height: 46px; margin-top: auto; padding: 10px 16px; display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; color: #fff; background: var(--seo-ink); font-weight: 900; text-align: center; text-decoration: none; }
.affiliate-button:hover { color: #000; background: var(--seo-accent); }
.checklist { padding: 22px; border: 1px solid var(--seo-line); border-radius: 18px; background: #f8f8f8; }
.checklist p { margin: 0; padding: 9px 0; border-bottom: 1px solid var(--seo-line); }
.checklist p:last-child { border-bottom: 0; }
.seo-footer { padding: 26px 0 40px; border-top: 1px solid var(--seo-line); color: var(--seo-muted); font-size: .9rem; }
@media (max-width: 700px) { .seo-header, .seo-main, .seo-footer { width: min(calc(100% - 28px), 760px); } .seo-header { padding: 16px 0; } .seo-main { padding-top: 48px; } .seo-header a:last-child { font-size: .9rem; } .affiliate-grid { grid-template-columns: 1fr; } .affiliate-card { padding: 20px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; } }