:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --subtle: #64748b;
  --border: #e2e8f0;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --primary-soft: #f0fdfa;
  --accent: #0284c7;
  --max-w: 1040px;
  --content-w: 760px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  margin: 0;
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.78;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
  flex-wrap: wrap;
  padding: 10px 0;
}
.brand {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand:hover { text-decoration: none; color: var(--primary); }
.brand-badge {
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
}
.main-nav { display: flex; gap: 18px; flex-wrap: wrap; font-size: 0.95rem; font-weight: 600; }
.main-nav a { color: var(--muted); padding: 4px 2px; }
.main-nav a:hover, .main-nav a.active { color: var(--primary); text-decoration: none; }

/* Hero */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #134e4a 100%);
  color: #f8fafc;
  padding: 44px 0 40px;
  margin-bottom: 32px;
}
.hero h1 { margin: 0 0 10px; font-size: 1.85rem; line-height: 1.35; letter-spacing: -0.02em; }
.hero p { margin: 0; color: #cbd5e1; font-size: 1.02rem; max-width: 680px; }
.cat-pills { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.cat-pill {
  background: rgba(255,255,255,0.12);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.18);
}
.cat-pill:hover { background: rgba(255,255,255,0.22); text-decoration: none; }

/* Post Cards Grid */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 8px 0 18px;
}
.section-head h2 { margin: 0; font-size: 1.3rem; letter-spacing: -0.01em; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 44px;
}
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  border-color: #cbd5e1;
}
.card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--subtle);
  margin-bottom: 10px;
}
.badge {
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 6px;
  font-size: 0.78rem;
}
.post-card h3 { margin: 0 0 10px; font-size: 1.15rem; line-height: 1.45; }
.post-card h3 a { color: var(--text); }
.post-card h3 a:hover { color: var(--primary); text-decoration: none; }
.post-card p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.62;
}
.read-more { font-size: 0.88rem; font-weight: 700; color: var(--primary); }

/* Article Layout */
.article-wrap {
  max-width: var(--content-w);
  margin: 28px auto 56px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 40px;
}
.breadcrumb {
  font-size: 0.85rem;
  color: var(--subtle);
  margin-bottom: 14px;
}
.breadcrumb a { color: var(--subtle); }
.article-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 22px;
  margin-bottom: 24px;
}
.article-header h1 {
  margin: 10px 0 12px;
  font-size: 1.75rem;
  line-height: 1.38;
  letter-spacing: -0.02em;
}
.article-desc {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 1.02rem;
}
.article-byline {
  font-size: 0.85rem;
  color: var(--subtle);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* TOC */
.toc {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: 10px;
  padding: 16px 20px;
  margin: 0 0 28px;
}
.toc-title {
  font-weight: 800;
  font-size: 0.96rem;
  margin-bottom: 8px;
  color: var(--text);
}
.toc ol {
  margin: 0;
  padding-left: 20px;
  font-size: 0.92rem;
}
.toc li { margin: 4px 0; }
.toc li.toc-sub { margin-left: 14px; list-style-type: circle; }

/* Article Body Typography */
.article-body h2 {
  margin: 38px 0 14px;
  font-size: 1.36rem;
  line-height: 1.4;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-soft);
  color: #0f172a;
}
.article-body h3 {
  margin: 26px 0 10px;
  font-size: 1.13rem;
  color: #1e293b;
}
.article-body p { margin: 0 0 16px; color: #1e293b; }
.article-body ul, .article-body ol { margin: 0 0 18px; padding-left: 22px; }
.article-body li { margin-bottom: 7px; }
.article-body blockquote {
  margin: 20px 0;
  padding: 14px 18px;
  background: var(--primary-soft);
  border-left: 4px solid var(--primary);
  border-radius: 8px;
  color: #134e4a;
}
.article-body blockquote p { margin: 0; }
.article-body code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.table-wrap {
  overflow-x: auto;
  margin: 20px 0 24px;
  border: 1px solid var(--border);
  border-radius: 10px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 480px;
}
th, td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  background: #f1f5f9;
  font-weight: 700;
  color: var(--text);
}
tr:last-child td { border-bottom: none; }

/* FAQ & Tags & Related */
.faq-section {
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.faq-item {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  margin-bottom: 12px;
}
.faq-q { font-weight: 700; color: var(--text); margin-bottom: 6px; }
.faq-a { color: var(--muted); font-size: 0.95rem; margin: 0; }
.tag-list { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 26px; }
.tag-chip {
  background: #f1f5f9;
  color: var(--muted);
  font-size: 0.82rem;
  padding: 4px 10px;
  border-radius: 999px;
}
.disclaimer-box {
  margin-top: 28px;
  padding: 14px 16px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.84rem;
  color: var(--subtle);
}
.related-box {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.related-box h2 { font-size: 1.15rem; margin: 0 0 14px; }
.related-list { list-style: none; padding: 0; margin: 0; }
.related-list li { margin-bottom: 10px; }
.ad-slot { margin: 24px 0; text-align: center; min-height: 90px; }

/* Footer */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 36px 0;
  margin-top: 56px;
  font-size: 0.88rem;
}
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.footer-links a { color: #e2e8f0; font-weight: 600; }
.footer-copy { margin: 0; color: #64748b; }

@media (max-width: 680px) {
  .article-wrap { padding: 22px 18px; margin: 16px 12px 40px; }
  .article-header h1 { font-size: 1.42rem; }
  .hero h1 { font-size: 1.48rem; }
}