/* ============ CLEAN CARD STYLE ============ */
@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/variable/pretendardvariable-dynamic-subset.css');

:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --border: #e8ebf0;
  --border-strong: #d8dce3;

  --ink-900: #1a1d23;
  --ink-700: #3d4250;
  --ink-500: #6b7180;
  --ink-400: #8b92a1;
  --ink-300: #c2c8d2;

  --brand: #2563eb;
  --brand-soft: #eff4ff;
  --accent: #f59e0b;
  --success: #10b981;

  --shadow-xs: 0 1px 2px rgba(30, 41, 59, 0.04);
  --shadow-sm: 0 1px 3px rgba(30, 41, 59, 0.06), 0 1px 2px rgba(30, 41, 59, 0.04);
  --shadow-md: 0 4px 12px rgba(30, 41, 59, 0.06);

  --radius: 12px;
  --radius-lg: 16px;
  --radius-sm: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Pretendard Variable', 'Pretendard', -apple-system, sans-serif;
  color: var(--ink-900);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  font-size: 15px;
  letter-spacing: -0.2px;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ============ HEADER ============ */
header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--ink-900);
  letter-spacing: -0.4px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: var(--brand);
  color: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}

.menu {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.menu > li > a {
  display: block;
  padding: 9px 14px;
  color: var(--ink-700);
  font-weight: 500;
  font-size: 14.5px;
  border-radius: 8px;
  transition: all 0.15s;
}

.menu > li > a:hover {
  color: var(--ink-900);
  background: var(--bg);
}

.menu-cta {
  background: var(--ink-900) !important;
  color: white !important;
  padding: 10px 18px !important;
  margin-left: 6px;
  font-weight: 600 !important;
}

.menu-cta:hover { background: var(--brand) !important; }

.has-sub { position: relative; }

.submenu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 220px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all 0.18s;
  list-style: none;
  box-shadow: var(--shadow-md);
}

.has-sub:hover .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.submenu a {
  display: block;
  padding: 9px 12px;
  color: var(--ink-700);
  font-size: 14px;
  border-radius: 6px;
  transition: all 0.12s;
  font-weight: 500;
}

.submenu a:hover {
  background: var(--bg);
  color: var(--brand);
}

.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink-900);
  border-radius: 2px;
  transition: 0.25s;
}

.hamburger.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============ PAGE HEADER ============ */
.page-header {
  padding: 56px 24px 40px;
  max-width: 780px;
  margin: 0 auto;
}

.crumb {
  font-size: 13px;
  color: var(--ink-500);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.crumb a:hover { color: var(--brand); }
.crumb .sep { color: var(--ink-300); }

.page-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.page-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink-900);
  letter-spacing: -0.8px;
  margin-bottom: 16px;
  word-break: keep-all;
}

.page-lead {
  font-size: 16px;
  color: var(--ink-500);
  line-height: 1.7;
  word-break: keep-all;
}

.page-meta {
  display: flex;
  gap: 18px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--ink-500);
}

.page-meta strong { color: var(--ink-900); font-weight: 600; }

/* ============ CONTENT ============ */
.content {
  padding: 0 24px 72px;
}

.content-inner {
  max-width: 780px;
  margin: 0 auto;
}

/* KPI 카드 */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}

.kpi {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.kpi-label {
  font-size: 13px;
  color: var(--ink-500);
  margin-bottom: 8px;
  font-weight: 500;
}

.kpi-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.1;
  letter-spacing: -0.8px;
}

.kpi-value .unit {
  font-size: 14px;
  color: var(--ink-500);
  font-weight: 500;
  margin-left: 3px;
}

/* 섹션 */
.section {
  margin-bottom: 36px;
}

.section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink-900);
  margin: 48px 0 16px;
  letter-spacing: -0.5px;
  line-height: 1.4;
  word-break: keep-all;
}

.section h2:first-child { margin-top: 0; }

.section h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-900);
  margin: 24px 0 10px;
  letter-spacing: -0.3px;
  word-break: keep-all;
}

.section p {
  font-size: 15.5px;
  color: var(--ink-700);
  line-height: 1.8;
  margin-bottom: 14px;
  word-break: keep-all;
}

.section strong { color: var(--ink-900); font-weight: 600; }

.section ul, .section ol {
  margin-bottom: 16px;
  padding-left: 22px;
}

.section li {
  font-size: 15px;
  color: var(--ink-700);
  line-height: 1.8;
  margin-bottom: 6px;
  word-break: keep-all;
}

/* 카드 - 범용 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 10px;
  margin-top: 0 !important;
  letter-spacing: -0.3px;
}

.card h3:not(:first-child) { margin-top: 18px !important; }

.card p:last-child { margin-bottom: 0; }

/* 요약 박스 */
.summary-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 32px;
  border-left: 3px solid var(--brand);
}

.summary-card .summary-label {
  font-size: 12px;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.summary-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.summary-card p {
  font-size: 15px;
  color: var(--ink-700);
  line-height: 1.75;
}

/* 데이터 테이블 */
.table-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 20px 0;
}

.data-table {
  width: 100%;
  font-size: 14px;
  border-collapse: collapse;
}

.data-table thead {
  background: var(--bg);
}

.data-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-700);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--ink-700);
}

.data-table tbody tr:last-child td { border-bottom: none; }

.data-table td:first-child {
  font-weight: 600;
  color: var(--ink-900);
}

.data-table .num {
  font-feature-settings: 'tnum';
  color: var(--ink-900);
  font-weight: 500;
}

/* 노트 박스 */
.note {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 20px 0;
}

.note .note-label {
  font-size: 12px;
  color: #b45309;
  font-weight: 700;
  letter-spacing: 0.3px;
  margin-bottom: 6px;
}

.note strong { color: #78350f; }

.note p {
  font-size: 14.5px;
  color: #78350f;
  line-height: 1.7;
  margin: 0;
}

.note.warning {
  background: #fef2f2;
  border-color: #fecaca;
}

.note.warning .note-label { color: #b91c1c; }
.note.warning p, .note.warning strong { color: #7f1d1d; }

/* Q&A */
.qna {
  margin: 24px 0;
}

.qna-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.18s;
}

.qna-item.open { border-color: var(--brand); }

.qna-btn {
  width: 100%;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  font-family: inherit;
  background: transparent;
}

.qna-q-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.qna-q-text {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-900);
  line-height: 1.5;
  word-break: keep-all;
}

.qna-arrow {
  flex-shrink: 0;
  color: var(--ink-400);
  font-size: 18px;
  transition: transform 0.3s;
}

.qna-item.open .qna-arrow { transform: rotate(45deg); color: var(--brand); }

.qna-ans {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.qna-ans-inner {
  padding: 0 22px 22px 64px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-700);
  word-break: keep-all;
}

/* CTA */
.cta {
  background: var(--ink-900);
  border-radius: var(--radius-lg);
  padding: 32px 32px 32px;
  margin: 40px 0 24px;
  color: white;
}

.cta h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.4px;
  line-height: 1.4;
  color: white;
}

.cta p {
  color: rgba(255,255,255,0.7);
  font-size: 14.5px;
  margin-bottom: 20px;
  line-height: 1.6;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--brand);
  color: white;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14.5px;
  transition: background 0.15s;
}

.cta-btn:hover { background: #1d4ed8; }
.cta-btn::after { content: '→'; }

/* 관련 리포트 */
.related {
  margin-top: 32px;
}

.related-label {
  font-size: 13px;
  color: var(--ink-500);
  font-weight: 600;
  margin-bottom: 12px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.related-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: all 0.18s;
}

.related-card:hover {
  border-color: var(--brand);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.related-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--brand);
  font-weight: 600;
  margin-bottom: 6px;
}

.related-card h4 {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 4px;
  letter-spacing: -0.2px;
  word-break: keep-all;
}

.related-card p {
  font-size: 13px;
  color: var(--ink-500);
  line-height: 1.5;
  word-break: keep-all;
}

/* ============ FOOTER ============ */
footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 40px 24px 24px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-500);
}

.footer-wrap {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.footer-brand-box .f-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.3px;
}

.footer-brand-box .f-icon {
  width: 28px;
  height: 28px;
  background: var(--brand);
  color: white;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.f-desc {
  color: var(--ink-500);
  font-size: 13px;
  line-height: 1.65;
  max-width: 300px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 10px;
}

.footer-col ul { list-style: none; }
.footer-col li { padding: 3px 0; }

.footer-col a {
  color: var(--ink-500);
  font-size: 13.5px;
}

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

.footer-notice {
  background: var(--bg);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--ink-500);
  line-height: 1.65;
  margin-bottom: 16px;
}

.footer-notice strong {
  color: var(--ink-700);
  display: block;
  margin-bottom: 4px;
  font-size: 12.5px;
  font-weight: 700;
}

.footer-copy {
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-400);
  padding-top: 14px;
  border-top: 1px solid var(--border);
  line-height: 1.7;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .nav-wrap { padding: 14px 18px; }

  .menu {
    position: fixed;
    top: 68px;
    right: -100%;
    width: 280px;
    height: calc(100vh - 68px);
    background: var(--card);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 0;
    transition: right 0.3s;
    box-shadow: var(--shadow-md);
    overflow-y: auto;
    border-left: 1px solid var(--border);
  }
  .menu.active { right: 0; }
  .menu > li > a { padding: 13px 14px; font-size: 15px; border-radius: 8px; }
  .submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 6px 12px;
    margin: 0;
    background: transparent;
  }
  .submenu a { padding: 8px 10px; font-size: 13.5px; }
  .menu-cta { margin-top: 10px; text-align: center; }
  .hamburger { display: flex; }

  .footer-top { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-brand-box { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  body { font-size: 14.5px; }
  .page-header { padding: 36px 18px 28px; }
  .content { padding: 0 18px 48px; }

  .section h2 { font-size: 19px; margin: 36px 0 12px; }
  .section h3 { font-size: 16px; }
  .section p { font-size: 15px; }

  .kpi-grid { grid-template-columns: 1fr; gap: 10px; }
  .kpi-value { font-size: 22px; }

  .summary-card, .card { padding: 20px 22px; }
  .cta { padding: 26px 24px; }
  .cta h3 { font-size: 18px; }

  .related-grid { grid-template-columns: 1fr; }

  .data-table { font-size: 13px; }
  .data-table th, .data-table td { padding: 10px 12px; }

  .qna-btn { padding: 16px 18px; gap: 12px; }
  .qna-q-text { font-size: 14.5px; }
  .qna-ans-inner { padding: 0 18px 18px 58px; font-size: 14px; }

  .footer-top { grid-template-columns: 1fr; gap: 20px; }
}