:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1d2733;
  --muted: #5b6672;
  --line: #e3e7ec;
  --accent: #1f6feb;
  --warn-bg: #fff7e6;
  --warn-ink: #8a5a00;
  --error-bg: #fdecec;
  --error-ink: #a1231d;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.65;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding-inline: 16px;
}

.site-header {
  background: linear-gradient(180deg, #0b1f3a, #0b1f3a 60%, #10294a);
  color: #eef3fb;
  padding-block: 28px 22px;
}
.site-header h1 { margin: 0 0 6px; font-size: 1.6rem; }
.site-header .lead { margin: 0; color: #c6d4e8; }
.site-header .lead strong { color: #fff; }
.portal-back { margin: 12px 0 0; }
.portal-back a { color: #9ec1f0; text-decoration: none; font-size: .9rem; }
.portal-back a:hover { text-decoration: underline; }

main.wrap { padding-block: 20px 48px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.panel h2 { margin: 0 0 12px; font-size: 1.05rem; }

.banner {
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: .92rem;
}
.banner-warn { background: var(--warn-bg); color: var(--warn-ink); border: 1px solid #f0dcae; }
.banner-error { background: var(--error-bg); color: var(--error-ink); border: 1px solid #f1c2be; }
.banner a { color: inherit; }

.controls { display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px; }
.control-group h2 { display: flex; align-items: center; justify-content: space-between; }

.region-actions { margin-bottom: 8px; }
.region-actions button,
.table-head button,
#btn-csv {
  font: inherit;
  background: #eef2f7;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
  color: var(--ink);
}
.region-actions button:hover,
.table-head button:hover { background: #e2e8f0; }

#region-list { display: flex; flex-direction: column; gap: 2px; }
.region-subhead {
  font-size: .78rem;
  color: var(--muted);
  margin: 10px 0 2px;
  letter-spacing: .04em;
}
.region-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 4px;
  border-radius: 6px;
  cursor: pointer;
}
.region-item:hover { background: #f2f5f9; }
.region-item input { accent-color: var(--accent); }
.swatch {
  width: 12px; height: 12px; border-radius: 3px; flex: none;
  border: 1px solid rgba(0,0,0,.15);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
  font-size: .9rem;
  color: var(--muted);
}
.field select {
  font: inherit;
  color: var(--ink);
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.chart-panel { padding-bottom: 10px; }
.chart-container { position: relative; height: 420px; }
.chart-container-sm { height: 260px; }
.metric-note { margin: 6px 2px 2px; font-size: .82rem; color: var(--muted); }

.table-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.table-head h2 { margin: 0; }
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .82rem; }
th, td { border: 1px solid var(--line); padding: 5px 8px; text-align: right; white-space: nowrap; }
th:first-child, td:first-child { text-align: left; position: sticky; left: 0; background: var(--panel); }
thead th { background: #f0f3f7; position: sticky; top: 0; }

.notes ul, #howto ol { margin: 0; padding-left: 1.25em; }
.notes li, #howto li { margin-bottom: 8px; font-size: .92rem; }
.notes a, #howto a { color: var(--accent); }
code {
  background: #eef2f7;
  padding: 1px 5px;
  border-radius: 5px;
  font-size: .88em;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 20px 40px;
  color: var(--muted);
  font-size: .82rem;
}
.site-footer p { margin: 4px 0; }

@media (max-width: 720px) {
  .controls { grid-template-columns: 1fr; gap: 18px; }
}

@media (max-width: 480px) {
  .chart-container { height: 280px; }
  .chart-container-sm { height: 220px; }
}