:root {
  --bg: #f7fafc;
  --surface: #ffffff;
  --text: #10233d;
  --muted: #52657e;
  --line: #d9e2ec;
  --brand: #2563EB;
  --brand-hover: #1D4ED8;
  --brand-weak: #EFF6FF;
  --ink-strong: #0F172A;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  background-image: linear-gradient(180deg, #f5f9ff 0%, #f7fafc 200px);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 32px 0;
  text-align: center;
  margin-bottom: 40px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.site-title {
  margin: 0;
  font-size: clamp(1.9rem, 3.3vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.site-title-link {
  color: inherit;
  text-decoration: none;
  display: inline-block;
  text-shadow: 0 1px 0 rgba(37, 99, 235, 0.08);
}

.site-title-link:hover {
  color: var(--brand);
}

.site-subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav {
  margin-top: 14px;
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  text-decoration: none;
  color: var(--brand);
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.88rem;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.site-nav a:hover {
  border-color: #bfd4ea;
  background: var(--brand-weak);
  color: var(--brand-hover);
}

.site-nav a.active,
.site-nav a[aria-current="page"] {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

main { padding: 0 0 80px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: 0 8px 20px rgba(16, 35, 61, 0.04);
}

h1 { margin: 0 0 10px; font-size: 1.6rem; }
h2 { margin-top: 28px; font-size: 1.2rem; }

.meta-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  min-width: 520px;
}

th, td {
  border: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--brand-weak);
  font-weight: 700;
}

td, th {
  font-size: 0.95rem;
}

.card p {
  margin: 10px 0;
}

.card h2 + p,
.card h2 + .table-wrap {
  margin-top: 10px;
}

.notice {
  padding: 14px;
  border-radius: 10px;
  border: 1px solid #bfd4ea;
  background: #f1f7ff;
  margin-top: 16px;
}

.section-block {
  margin-top: 22px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.kpi-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 12px;
}

.kpi-label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
}

.kpi-value {
  display: block;
  margin-top: 4px;
  font-weight: 700;
  color: var(--text);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 4px;
}

.inline-badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid #bfd4ea;
  background: var(--brand-weak);
  color: var(--brand-hover);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.82rem;
  font-weight: 600;
}

.policy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.policy-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 12px;
}

.policy-card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.policy-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.check-list {
  margin: 12px 0 0;
  padding-left: 20px;
}

.check-list li {
  margin: 7px 0;
}

.source-links {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.93rem;
}

.source-links a {
  color: var(--brand);
}

.policy-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.policy-tab-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.policy-tab-btn.active {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.policy-panel {
  margin-top: 12px;
  animation: tabFadeIn 0.24s ease;
}

.policy-panel[hidden] {
  display: none;
}

.guide-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0 18px;
}

.guide-tab-link {
  text-decoration: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 999px;
  padding: 8px 13px;
  font-size: 0.87rem;
  font-weight: 700;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.guide-tab-link:hover {
  border-color: #bfd4ea;
  background: #f4f8fd;
}

.guide-tab-link.active,
.guide-tab-link[aria-current="page"] {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.brand-palette {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.brand-swatch {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.brand-swatch-chip {
  height: 52px;
}

.brand-swatch-info {
  padding: 8px 10px;
}

.brand-swatch-name {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
}

.brand-swatch-code {
  display: block;
  margin-top: 2px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  color: var(--ink-strong);
  font-weight: 700;
}

@keyframes tabFadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.faq-item {
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

.faq-item:first-of-type { border-top: none; }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 40px 0;
  text-align: center;
  margin-top: 60px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.footer-links a { color: var(--brand); }

.footer-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .card { padding: 20px; }
  .site-nav { justify-content: flex-start; }
  .site-nav { gap: 8px; }
  .site-nav a { font-size: 0.82rem; }
  .kpi-grid { grid-template-columns: 1fr; }
  .policy-grid { grid-template-columns: 1fr; }
  .brand-palette { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-tabs {
    gap: 6px;
    position: sticky;
    top: 8px;
    z-index: 30;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 12px;
  }
  .policy-tabs {
    position: sticky;
    top: 8px;
    z-index: 30;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 12px;
  }
  .guide-tab-link { font-size: 0.8rem; padding: 7px 11px; }
  td, th { font-size: 0.9rem; }
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
  }
  .table-wrap table {
    min-width: 460px;
    margin-top: 0;
  }
  .table-wrap th,
  .table-wrap td {
    padding: 8px;
    line-height: 1.45;
  }
}