:root {
  --bg-deep: #f5f6f8;
  --bg-card: #ffffff;
  --bg-card-hover: #eef1f6;
  --border: #dde2ea;
  --text-primary: #1a2540;
  --text-secondary: #5a6478;
  --text-muted: #94a3b8;
  --accent-nova: #1e3a8a;
  --accent-glow: #2563eb;
  --accent-warm: #c2410c;
  --accent-purple: #7c3aed;
  --font-mono: 'Space Mono', monospace;
  --font-body: 'Pretendard', 'Noto Sans KR', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.8;
  font-variant-numeric: tabular-nums;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── NAV ── */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2.5rem;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
}

.nav-logo {
  font-family: 'Pretendard', sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--accent-nova);
  text-decoration: none;
  letter-spacing: 0;
}

.nav-links { display: flex; gap: 2rem; }

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--accent-nova); }

/* ── MAIN ── */
main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* ── HERO (index) ── */
.hero {
  text-align: center;
  padding: 3rem 0 1rem;
}

.hero-logo {
  max-width: 600px;
  width: 100%;
  margin-bottom: 2rem;
  border-radius: 12px;
}

.hero h1 {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-nova);
  letter-spacing: 0;
  margin-bottom: 0.8rem;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 540px;
  margin: 0 auto;
}

.hero-stat {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-nova);
  margin-bottom: 0.3rem;
}

.hero-stat #neoCount {
  font-weight: 800;
  font-size: 1.4rem;
}

.hero-source {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0;
}

/* ── SECTION ── */
.section {
  margin-top: 2.5rem;
}

.section.overview {
  margin-top: 1.5rem;
}

.section h2 {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-glow);
  letter-spacing: 0;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.hint-tip {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 0.8rem;
  opacity: 0.8;
}

/* ── REPORT CARDS (index list) ── */
.report-list {
  list-style: none;
  max-width: 720px;
  margin: 0 auto;
}

.report-card {
  display: block;
  padding: 1.4rem 1.6rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s;
}

.report-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-nova);
}

.report-card .card-date {
  font-family: 'Pretendard', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
}

.report-card .card-title {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-top: 0.3rem;
}

.report-card .card-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
}

.report-card .card-tags {
  margin-top: 0.6rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: rgba(30, 58, 138, 0.06);
  color: var(--accent-nova);
  border: 1px solid rgba(30, 58, 138, 0.18);
}

.view-all {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent-nova);
  font-size: 0.9rem;
  text-decoration: none;
}

.view-all:hover { text-decoration: underline; }

/* ── REPORT ARTICLE ── */
.report-breadcrumb {
  margin-bottom: 1.5rem;
}

.report-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.report-breadcrumb a:hover {
  color: var(--accent-nova);
}

.report-article { padding: 2rem 0; }

.report-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.report-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0.5rem 0 0.8rem;
}

.report-date {
  font-family: 'Pretendard', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0;
}

.report-summary {
  color: var(--text-secondary);
  font-size: 1rem;
}

.report-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.report-body h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2.5rem 0 0.8rem;
  color: var(--accent-glow);
}

.report-body h3 {
  font-size: 1rem;
  font-weight: 500;
  margin: 2rem 0 0.6rem;
  color: var(--accent-nova);
}

.report-body p { margin-bottom: 1rem; }

.report-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.report-body th,
.report-body td {
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
}

.report-body th {
  background: var(--bg-card);
  font-weight: 500;
  color: var(--accent-nova);
}

.report-body code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-card);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.report-body blockquote {
  border-left: 3px solid var(--accent-nova);
  padding: 0.5rem 1rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  background: rgba(30, 58, 138, 0.04);
  border-radius: 0 6px 6px 0;
}

.report-body ul, .report-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.report-body li { margin-bottom: 0.3rem; }

.report-body img {
  max-width: 100%;
  border-radius: 8px;
  margin: 1rem 0;
}

.report-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.report-footer a {
  color: var(--accent-nova);
  text-decoration: none;
  font-size: 0.9rem;
}

.report-footer a:hover { text-decoration: underline; }

/* ── REPORT SUMMARY BOX ── */
.report-summary-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.8rem 2rem;
  margin-bottom: 2.5rem;
}

.summary-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}

.report-summary-box h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-glow);
  margin: 0;
  gap: 0.8rem;
}

.summary-neo-badge {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.07), rgba(124, 58, 237, 0.05));
  border: 1px solid rgba(30, 58, 138, 0.2);
  border-radius: 10px;
  padding: 0.6rem 1.2rem;
}

.neo-badge-count {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-nova);
  line-height: 1;
}

.neo-badge-unit {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem 2rem;
  align-items: start;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-height: 0;
}

.summary-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-nova);
  letter-spacing: 0.02em;
}

.summary-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 400;
}

/* ── REPORT TABLE EXTRAS ── */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 2rem;
}

td.num {
  text-align: right !important;
  font-variant-numeric: tabular-nums;
}

.step-desc {
  font-size: 0.78em;
  color: var(--text-muted);
}

.report-body th {
  text-align: center;
}

.highlight-row {
  background: rgba(30, 58, 138, 0.06);
}

.highlight-row td {
  color: var(--accent-nova);
  font-weight: 500;
}

.total-row {
  border-top: 2px solid var(--border);
  background: rgba(30, 58, 138, 0.03);
}

/* ── TABLE (general) ── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

th, td {
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
}

th {
  background: var(--bg-card);
  font-weight: 500;
  color: var(--accent-nova);
}

/* ── ABOUT PAGE ── */
.about-content h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-glow);
  margin: 2.5rem 0 0.8rem;
}

.about-content p { margin-bottom: 1rem; }

.about-content a {
  color: var(--accent-nova);
  text-decoration: none;
}

.about-content a:hover { text-decoration: underline; }

/* ── REPORT INDEX PAGE ── */
.page-header {
  margin-bottom: 2.5rem;
}

.page-header h1 {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-nova);
  letter-spacing: 0;
}

.page-header p {
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* ── CUMULATIVE CARD (inside report-list) ── */
.report-card.cumulative-card {
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.05), rgba(124, 58, 237, 0.03));
  border: 1px solid rgba(30, 58, 138, 0.22);
}

.report-card.cumulative-card:hover {
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.07), rgba(124, 58, 237, 0.05));
}

.cumulative-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.3rem;
}

.cumulative-card .card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-nova);
}

.cumulative-card .card-summary {
  margin-top: 0.4rem;
}

.cumulative-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.2rem;
  margin-bottom: 1.2rem;
  padding: 1rem 0.8rem;
  background: rgba(245, 246, 248, 0.85);
  border-radius: 8px;
}

.cum-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  flex: 1;
}

.cum-stat-value {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-nova);
  line-height: 1.2;
}

.cum-stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.cum-stat-divider {
  width: 1px;
  height: 2.2rem;
  background: rgba(30, 58, 138, 0.18);
  flex-shrink: 0;
}


.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: 8px;
}

/* ── HAMBURGER (hidden on desktop) ── */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 101;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  margin: 5px 0;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ── FEATURED NEOLOGISM ── */
.featured-neo {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 2rem 2.5rem;
  margin-bottom: 1.5rem;
}

.featured-neo-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.featured-neo-title {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  text-decoration: none;
  transition: opacity 0.2s;
  color: var(--accent-nova);
}

.featured-neo-title:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.featured-neo-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.featured-neo-charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.featured-chart-box {
  background: var(--bg-deep);
  border-radius: 8px;
  padding: 1.5rem 1.5rem 1.8rem;
  display: flex;
  flex-direction: column;
}

.featured-chart-box h4 {
  font-size: 0.85rem;
  color: var(--accent-glow);
  margin-bottom: 0.8rem;
  font-weight: 500;
  flex-shrink: 0;
}

.featured-chart-box canvas {
  height: 240px !important;
}


/* ── INTRO HEADER (ABOUT) ── */
.intro-header {
  text-align: center;
  padding: 2rem 2rem 1rem;
}

.intro-logo {
  max-width: 480px;
  width: 100%;
  border-radius: 12px;
}

main {
  text-align: justify;
  word-break: keep-all;
}

main h1, main h2, main h3 {
  text-align: left;
}

main img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
  border-radius: 8px;
}

/* ── FOOTER ── */
.site-footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: auto;
}

/* ═══════ MOBILE: TABLET AND BELOW ═══════ */
@media (max-width: 768px) {

  /* ── NAV: Hamburger visible, links become vertical dropdown ── */
  .nav-hamburger {
    display: block;
  }

  .nav-hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    gap: 0;
    backdrop-filter: blur(12px);
  }

  .nav-links.nav-open {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(221, 226, 234, 0.7);
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  .top-nav {
    padding: 1rem 1.2rem;
  }

  /* ── MAIN CONTENT ── */
  main {
    padding: 2rem 1.2rem;
  }

  /* ── HERO ── */
  .hero {
    padding: 1.5rem 0 1rem;
  }

  .hero-logo {
    max-width: 100%;
  }

  .hero h1 {
    font-size: 1.2rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-stat {
    font-size: 1rem;
  }

  .hero-stat #neoCount {
    font-size: 1.2rem;
  }

  /* ── FEATURED NEOLOGISM CARDS ── */
  .featured-neo {
    padding: 1.2rem 1rem 1.5rem;
    overflow: hidden;
  }

  .featured-neo-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .featured-neo-title {
    font-size: 1.15rem;
  }

  .featured-neo-meta {
    font-size: 0.75rem;
  }

  .featured-neo-charts {
    grid-template-columns: 1fr;
    min-width: 0;
  }

  .featured-chart-box {
    padding: 1rem 1rem 1.2rem;
    min-width: 0;
    overflow: hidden;
  }

  .featured-chart-box canvas {
    height: 260px !important;
  }

  /* ── SECTION HEADINGS ── */
  .section h2 {
    font-size: 1rem;
  }

  .hint-tip {
    display: block;
    margin-left: 0;
    margin-top: 0.3rem;
  }

  /* ── CUMULATIVE CARD ── */
  .cumulative-title-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .cumulative-stats {
    flex-wrap: wrap;
    gap: 0.8rem;
    padding: 0.8rem 0.6rem;
  }

  .cum-stat {
    flex: 0 0 calc(50% - 0.8rem);
  }

  .cum-stat-divider {
    display: none;
  }

  .cum-stat-value {
    font-size: 1.1rem;
  }

  /* ── REPORT CARDS ── */
  .report-card {
    padding: 1.1rem 1.2rem;
  }

  .report-card .card-title {
    font-size: 0.95rem;
  }

  /* ── REPORT ARTICLE ── */
  .report-header h1 {
    font-size: 1.3rem;
  }

  .report-body table {
    font-size: 0.8rem;
  }

  .report-body th,
  .report-body td {
    padding: 0.5rem 0.6rem;
  }

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

  .report-summary-box {
    padding: 1.2rem 1.2rem;
  }

  /* ── ABOUT PAGE ── */
  main {
    text-align: left;
  }

  main ul {
    padding-left: 1.2rem;
  }

  .intro-header {
    padding: 1.5rem 1rem 0.5rem;
  }

  .intro-logo {
    max-width: 320px;
  }

  main h2 {
    font-size: 1.1rem;
  }

  main h3 {
    font-size: 1rem;
  }

  main table {
    font-size: 0.78rem !important;
    max-width: 100% !important;
  }

  main table th,
  main table td {
    padding: 0.4rem 0.5rem;
  }

  main img[style*="max-width:60%"],
  main img[style*="max-width:80%"] {
    max-width: 95% !important;
  }

  /* ── PAGE HEADER ── */
  .page-header h1 {
    font-size: 1.2rem;
  }
}

/* ═══════ MOBILE: PHONES ONLY ═══════ */
@media (max-width: 480px) {

  .top-nav {
    padding: 0.8rem 1rem;
  }

  main {
    padding: 1.5rem 1rem;
  }

  .hero {
    padding: 1rem 0;
  }

  .hero h1 {
    font-size: 1.05rem;
  }

  .hero-stat {
    font-size: 0.9rem;
  }

  .hero-stat #neoCount {
    font-size: 1.05rem;
  }

  .hero p {
    font-size: 0.85rem;
  }

  .featured-neo {
    padding: 1rem 0.8rem;
  }

  .featured-neo-title {
    font-size: 1.05rem;
  }

  .featured-chart-box canvas {
    height: 230px !important;
  }

  .section h2 {
    font-size: 0.9rem;
  }

  .report-card {
    padding: 1rem;
  }

  /* ── ABOUT PAGE (phones) ── */
  .intro-logo {
    max-width: 240px;
  }

  main h2 {
    font-size: 1rem;
  }

  main table {
    font-size: 0.72rem !important;
  }

  main table th,
  main table td {
    padding: 0.3rem 0.4rem;
  }
}