/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  background: #f5f7fa;
  color: #1a1a2e;
  line-height: 1.7;
}

/* ========== Header ========== */
.report-header {
  background: linear-gradient(135deg, #1565C0 0%, #0D47A1 100%);
  color: #fff;
  padding: 60px 24px 48px;
  text-align: center;
}
.report-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.report-header .subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
}
.report-header .meta {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  opacity: 0.85;
}

/* ========== Navigation ========== */
.toc {
  background: #fff;
  border-bottom: 1px solid #e0e0e0;
  padding: 12px 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  overflow-x: auto;
  white-space: nowrap;
}
.toc a {
  display: inline-block;
  padding: 6px 14px;
  margin: 2px 4px;
  font-size: 0.85rem;
  color: #1565C0;
  text-decoration: none;
  border-radius: 20px;
  transition: all 0.2s;
}
.toc a:hover { background: #E3F2FD; }

/* ========== Main ========== */
.container { max-width: 1100px; margin: 0 auto; padding: 32px 20px; }

/* ========== Section ========== */
.section {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  margin-bottom: 32px;
  padding: 36px 32px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s, transform 0.6s;
}
.section.visible { opacity: 1; transform: translateY(0); }
.section h2 {
  font-size: 1.5rem;
  color: #1565C0;
  border-bottom: 3px solid #1565C0;
  padding-bottom: 8px;
  margin-bottom: 24px;
}
.section h3 {
  font-size: 1.15rem;
  color: #333;
  margin: 24px 0 12px;
}

/* ========== KPI Cards ========== */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 20px 0;
}
.kpi-card {
  background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}
.kpi-card .value {
  font-size: 2rem;
  font-weight: 700;
  color: #1565C0;
}
.kpi-card .label {
  font-size: 0.85rem;
  color: #555;
  margin-top: 4px;
}

/* ========== Tables ========== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.9rem;
}
.data-table th {
  background: #1565C0;
  color: #fff;
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
}
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid #e8e8e8;
}
.data-table tr:nth-child(even) td { background: #fafbfc; }
.data-table tr:hover td { background: #E3F2FD; }

/* ========== Chart wrappers ========== */
.chart-img-wrap {
  text-align: center;
  margin: 20px 0;
}
.chart-img-wrap img {
  max-width: 100%;
  max-height: 420px;
  width: auto;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  cursor: zoom-in;
  transition: transform 0.2s;
}
.chart-img-wrap img:hover { transform: scale(1.02); }
.chartjs-canvas-wrap {
  position: relative;
  margin: 20px 0;
  max-width: 700px;
  cursor: zoom-in;
}
.chartjs-canvas-wrap canvas { max-width: 100%; }

/* ========== Insights ========== */
.insight {
  background: #FFF8E1;
  border-left: 4px solid #FFB300;
  padding: 16px 20px;
  margin: 16px 0;
  border-radius: 0 8px 8px 0;
  font-size: 0.95rem;
}
.insight strong { color: #E65100; }

/* ========== Source tags ========== */
.source-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 10px;
  margin-right: 4px;
}
.source-tag.data { background: #E3F2FD; color: #1565C0; }
.source-tag.web { background: #E8F5E9; color: #2E7D32; }

/* ========== Footer ========== */
.report-footer {
  background: #1a1a2e;
  color: rgba(255,255,255,0.7);
  padding: 32px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.85rem;
}
.report-footer a { color: #90CAF9; text-decoration: none; }
.report-footer a:hover { color: #fff; }
.footer-credit {
  width: 100%;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 12px;
  margin-top: 12px;
}

/* ========== Chart Modal ========== */
.chart-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  justify-content: center;
  align-items: center;
}
.chart-modal.active { display: flex; }
.chart-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
}
.chart-modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  animation: modalIn 0.3s ease;
}
.chart-modal-content img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.chart-modal-close {
  position: absolute;
  top: -12px;
  right: -12px;
  background: #fff;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}
@keyframes modalIn {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .report-header h1 { font-size: 1.4rem; }
  .section { padding: 24px 16px; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}