:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #0f1b2d;
  --ink-2: #4a5568;
  --ink-3: #8a94a6;
  --line: #e3e8ef;
  --brand: #1747d1;
  --brand-ink: #ffffff;
  --brand-soft: #e9efff;
  --safe: #138a52;
  --safe-soft: #e3f6ec;
  --warn: #b7791f;
  --warn-soft: #fdf3e1;
  --danger: #c53030;
  --danger-soft: #fdeaea;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 27, 45, .06), 0 4px 16px rgba(15, 27, 45, .05);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: Pretendard, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  font-size: 16px; line-height: 1.7; word-break: keep-all; overflow-wrap: anywhere;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 19px; color: var(--ink); }
.logo:hover { text-decoration: none; }
.nav { display: flex; gap: 22px; }
.nav a { color: var(--ink-2); font-weight: 600; font-size: 15px; }
.nav a:hover { color: var(--brand); text-decoration: none; }
.menu-btn { display: none; background: none; border: 0; font-size: 22px; cursor: pointer; color: var(--ink); }
@media (max-width: 760px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; top: 60px; left: 0; right: 0; flex-direction: column; gap: 0;
         background: var(--surface); border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 16px; border-top: 1px solid var(--line); }
}

/* hero */
.hero { text-align: center; padding: 64px 0 40px; }
.hero h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.25; margin: 0 0 14px; letter-spacing: -0.02em; }
.hero p { color: var(--ink-2); font-size: 18px; margin: 0 0 28px; }
.check-form { display: flex; gap: 8px; max-width: 640px; margin: 0 auto; background: var(--surface);
  border: 2px solid var(--brand); border-radius: 999px; padding: 6px; box-shadow: var(--shadow); }
.check-form input { flex: 1; min-width: 0; border: 0; outline: 0; font: inherit; font-size: 17px; padding: 10px 16px; background: transparent; color: var(--ink); }
.check-form button, .btn { background: var(--brand); color: var(--brand-ink); border: 0; border-radius: 999px;
  font: inherit; font-weight: 700; padding: 10px 22px; cursor: pointer; white-space: nowrap; display: inline-block; }
.btn:hover, .check-form button:hover { filter: brightness(1.08); text-decoration: none; }
.btn.ghost { background: var(--brand-soft); color: var(--brand); }
.hint { color: var(--ink-3); font-size: 14px; margin-top: 12px; }

/* sections & cards */
.section { margin: 48px 0; }
.section h2 { font-size: 24px; margin: 0 0 18px; letter-spacing: -0.01em; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); color: var(--ink); display: block; }
a.card:hover { border-color: var(--brand); text-decoration: none; }
.card h3 { margin: 8px 0 6px; font-size: 18px; line-height: 1.45; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }
.card .meta { display: block; margin-top: 12px; }
.tag { display: inline-block; background: var(--brand-soft); color: var(--brand); font-size: 13px; font-weight: 700; padding: 2px 10px; border-radius: 999px; }
.meta { color: var(--ink-3); font-size: 14px; }
.feature { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.feature .card .icon { font-size: 28px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.stat b { display: block; font-size: 26px; }
.stat span { color: var(--ink-2); font-size: 14px; }
.stat small { display: block; color: var(--ink-3); font-size: 12px; margin-top: 6px; }
.alert-band { background: var(--danger-soft); border: 1px solid #f5c2c2; border-radius: var(--radius); padding: 18px 22px; }
.alert-band strong { color: var(--danger); }

/* page & article */
.page-head { padding: 40px 0 8px; }
.page-head h1 { font-size: 32px; margin: 0 0 8px; }
.page-head p { color: var(--ink-2); margin: 0 0 24px; }
.crumbs { font-size: 14px; color: var(--ink-3); padding-top: 24px; }
.crumbs a { color: var(--ink-3); }
.article { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(20px, 4vw, 48px); margin: 16px 0 32px; }
.article-head h1 { font-size: clamp(26px, 4vw, 34px); line-height: 1.35; margin: 12px 0; letter-spacing: -0.02em; }
.lead { font-size: 18px; color: var(--ink-2); margin: 0 0 12px; }
.prose { max-width: 720px; font-size: 17px; }
.prose h2 { font-size: 23px; margin: 40px 0 12px; padding-top: 8px; border-top: 1px solid var(--line); }
.prose h3 { font-size: 19px; margin: 28px 0 8px; }
.prose li { margin: 6px 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 16px 0; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--bg); }
.prose blockquote { margin: 16px 0; padding: 12px 18px; border-left: 4px solid var(--brand); background: var(--brand-soft); border-radius: 0 8px 8px 0; }
.box { border-radius: 10px; padding: 14px 18px; margin: 18px 0; }
.box.danger { background: var(--danger-soft); }
.box.warn { background: var(--warn-soft); }
.box.safe { background: var(--safe-soft); }
.notice { margin-top: 40px; font-size: 14px; color: var(--ink-2); background: var(--bg); border-radius: 10px; padding: 14px 18px; }
.sources { font-size: 14px; color: var(--ink-2); }

/* checker result */
.result { display: none; margin: 32px auto; max-width: 820px; }
.result.show { display: block; }
.score-card { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.gauge { width: 140px; height: 140px; border-radius: 50%; display: grid; place-items: center; flex: none;
  background: conic-gradient(var(--c, var(--brand)) calc(var(--p, 0) * 1%), var(--line) 0); }
.gauge div { width: 112px; height: 112px; border-radius: 50%; background: var(--surface); display: grid; place-items: center; text-align: center; }
.gauge b { font-size: 34px; line-height: 1; }
.gauge span { font-size: 12px; color: var(--ink-3); }
.verdict { font-size: 22px; font-weight: 800; margin: 0 0 6px; }
.signals { list-style: none; padding: 0; margin: 20px 0 0; }
.signals li { display: flex; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.signals .dot { width: 10px; height: 10px; border-radius: 50%; margin-top: 9px; flex: none; }
.dot.good { background: var(--safe); } .dot.bad { background: var(--danger); } .dot.mid { background: var(--warn); } .dot.info { background: var(--ink-3); }
.signals strong { display: block; }
.signals span { color: var(--ink-2); font-size: 15px; }
.loading { text-align: center; color: var(--ink-2); padding: 24px; }

/* quiz */
.quiz { max-width: 760px; margin: 0 auto 40px; }
.q { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 12px; }
.q p { margin: 0 0 10px; font-weight: 600; }
.q label { display: inline-flex; align-items: center; gap: 6px; margin-right: 18px; cursor: pointer; color: var(--ink-2); }

/* forms */
.form { display: grid; gap: 14px; max-width: 560px; }
.form input, .form textarea, .form select { font: inherit; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); width: 100%; }

/* footer */
.site-footer { background: #0f1b2d; color: #c7cfdb; margin-top: 64px; padding: 40px 0 24px; font-size: 15px; }
.site-footer strong { color: #fff; font-size: 17px; }
.footer-inner { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-inner p { margin: 6px 0; max-width: 520px; }
.footer-nav { display: flex; flex-direction: column; gap: 6px; }
.footer-nav a { color: #c7cfdb; }
.small { font-size: 13px; color: #8a94a6; }
.copyright { margin-top: 24px; padding-top: 16px; border-top: 1px solid #22314a; font-size: 13px; color: #8a94a6; }

/* embedded shorts */
.short { margin: 24px auto; max-width: 320px; }
.short iframe { width: 100%; aspect-ratio: 9 / 16; border: 0; border-radius: 12px; background: #000; display: block; }
.short figcaption { font-size: 14px; color: var(--ink-3); text-align: center; margin-top: 8px; }