:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --accent: #f59e0b;
  --text: #111827;
  --text-muted: #6b7280;
  --bg: #f9fafb;
  --bg-card: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --radius: 8px;
  --max-w: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; }

/* ── Layout ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 16px; }

/* ── Header ── */
.site-header {
  background: var(--primary);
  color: #fff;
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}
.site-header .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 56px;
}
.site-header .logo { font-size: 1.1rem; font-weight: 700; color: #fff; white-space: nowrap; }
.site-header .logo:hover { text-decoration: none; opacity: .9; }
.site-nav { display: flex; gap: 4px; flex: 1; }
.site-nav a {
  color: rgba(255,255,255,.85);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: .9rem;
  transition: background .15s;
}
.site-nav a:hover, .site-nav a.active {
  background: rgba(255,255,255,.18);
  color: #fff;
  text-decoration: none;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  margin-left: auto;
}

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  padding: 64px 16px;
  text-align: center;
}
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
.hero p { font-size: 1.05rem; opacity: .9; max-width: 560px; margin: 0 auto 24px; }
.hero .search-bar {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  border-radius: 40px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.hero .search-bar input {
  flex: 1;
  padding: 14px 20px;
  border: none;
  font-size: 1rem;
  outline: none;
  font-family: inherit;
}
.hero .search-bar button {
  padding: 14px 24px;
  background: var(--accent);
  border: none;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s;
  font-family: inherit;
}
.hero .search-bar button:hover { background: #d97706; }

/* ── Cards ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 32px 0;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  text-align: center;
}
.stat-card .label { font-size: .9rem; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .05em; }
.stat-card .value { font-size: 1.7rem; font-weight: 800; color: var(--primary); display: inline; }
.stat-card .unit { font-size: .85rem; color: var(--text-muted); margin-left: 3px; display: inline; }

/* ── Section ── */
.section { padding: 40px 0; }
.section-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 20px; padding-bottom: 8px; border-bottom: 2px solid var(--primary); display: inline-block; }

/* ── Charts ── */
.chart-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.chart-card h3 { font-size: .95rem; font-weight: 600; margin-bottom: 12px; color: var(--text-muted); }
.chart-card canvas { width: 100% !important; }
.chart-note { font-size: .75rem; color: var(--text-muted); margin-top: 10px; line-height: 1.5; }

/* ── Map ── */
#map-container { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
#map-container h3 { font-size: .95rem; font-weight: 600; margin-bottom: 12px; color: var(--text-muted); }
#map-svg { width: 100%; height: auto; }
.map-tooltip {
  position: fixed;
  background: rgba(0,0,0,.8);
  color: #fff;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: .8rem;
  pointer-events: none;
  display: none;
  z-index: 200;
}

/* ── Table ── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th { background: var(--bg); border-bottom: 2px solid var(--border); padding: 10px 12px; text-align: left; font-size: .8rem; color: var(--text-muted); white-space: nowrap; }
td { border-bottom: 1px solid var(--border); padding: 10px 12px; vertical-align: top; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f0f4ff; }

/* ── Ranking list ── */
.rank-table .rank-num { font-weight: 800; color: var(--text-muted); font-size: 1rem; width: 40px; }
.rank-table .rank-num.gold { color: #d97706; }
.rank-table .rank-num.silver { color: #6b7280; }
.rank-table .rank-num.bronze { color: #b45309; }
.rank-table .company-name { font-weight: 600; }
.rank-table .amount { font-weight: 700; color: var(--primary); text-align: right; white-space: nowrap; }

/* ── Tabs ── */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 24px; flex-wrap: wrap; }
.tab-btn {
  padding: 8px 16px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: .9rem;
  font-family: inherit;
  color: var(--text-muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color .15s;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Search ── */
.search-controls {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.search-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.search-input-wrap { flex: 1; min-width: 200px; }
.search-input-wrap input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color .15s;
}
.search-input-wrap input:focus { border-color: var(--primary); }
.filter-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 12px; }
.filter-row select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .9rem;
  font-family: inherit;
  background: #fff;
  cursor: pointer;
  outline: none;
}
.filter-row select:focus { border-color: var(--primary); }
.result-count { font-size: .85rem; color: var(--text-muted); margin-bottom: 12px; }

/* ── Company cards ── */
.company-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow);
  margin-bottom: 12px;
  display: flex;
  gap: 16px;
  align-items: center;
  transition: box-shadow .15s;
}
.company-card:hover { box-shadow: var(--shadow-md); }
.company-card .info { flex: 1; min-width: 0; }
.company-card .name { font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
.company-card .meta { font-size: .82rem; color: var(--text-muted); }
.company-card .amount-wrap { text-align: right; white-space: nowrap; }
.company-card .amount { font-size: 1.15rem; font-weight: 800; color: var(--primary); }
.company-card .count { font-size: .8rem; color: var(--text-muted); }

/* ── Company detail ── */
.company-header {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.company-header h1 { font-size: 1.6rem; font-weight: 800; margin-bottom: 8px; }
.company-header .meta { color: var(--text-muted); font-size: .9rem; }
.company-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.summary-card .label { font-size: .78rem; color: var(--text-muted); margin-bottom: 4px; }
.summary-card .value { font-size: 1.4rem; font-weight: 800; color: var(--primary); }

/* ── Pagination ── */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
  cursor: pointer;
  font-family: inherit;
  font-size: .9rem;
  transition: background .15s;
}
.page-btn:hover { background: #e8efff; }
.page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-btn:disabled { opacity: .4; cursor: default; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
}
.badge-blue { background: #dbeafe; color: #1e40af; }
.badge-green { background: #d1fae5; color: #065f46; }
.badge-amber { background: #fef3c7; color: #92400e; }

/* ── Footer ── */
.site-footer {
  background: #1f2937;
  color: rgba(255,255,255,.75);
  padding: 32px 16px;
  margin-top: 64px;
  font-size: .85rem;
}
.site-footer .inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: flex-start;
}
.site-footer .credit { line-height: 1.8; }
.site-footer a { color: rgba(255,255,255,.8); }
.site-footer a:hover { color: #fff; }
.site-footer .nav-links { display: flex; flex-wrap: wrap; gap: 12px; }

/* ── Loading / Empty state ── */
.loading { text-align: center; padding: 48px; color: var(--text-muted); }
.loading::after { content: ""; display: inline-block; width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin .7s linear infinite; margin-left: 8px; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }
.empty-state { text-align: center; padding: 48px; color: var(--text-muted); }
.empty-state p { margin-top: 8px; }

/* ── Alert ── */
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: .9rem; }
.alert-info { background: #dbeafe; color: #1e40af; }
.alert-warn { background: #fef3c7; color: #92400e; }

/* ── About page ── */
.prose h2 { font-size: 1.15rem; font-weight: 700; margin: 28px 0 8px; border-left: 4px solid var(--primary); padding-left: 10px; }
.prose p { margin-bottom: 12px; }
.prose ul { margin: 8px 0 12px 20px; }
.prose li { margin-bottom: 4px; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 8px 0;
    box-shadow: var(--shadow-md);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 24px; border-radius: 0; }
  .hero h1 { font-size: 1.4rem; }
  .chart-grid { grid-template-columns: 1fr; }
  .company-card { flex-direction: column; align-items: flex-start; }
  .company-card .amount-wrap { text-align: left; }
}