/* 日本×世界 姉妹・友好都市マップ — 和紙×藍のトーン */
:root {
  --bg: #f7f5f0;
  --paper: #ffffff;
  --ink: #2b2b2b;
  --ink-soft: #6b6b66;
  --ai: #234e70;          /* 藍 */
  --ai-deep: #16344d;
  --akane: #b5495b;       /* 茜（アクセント） */
  --line: #e3ded4;
  --map0: #eceae3;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(35, 78, 112, .08);
  font-size: 15px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
}
a { color: var(--ai); }

/* ===== header ===== */
.site-header {
  background: linear-gradient(135deg, var(--ai-deep) 0%, var(--ai) 70%, #2f6a8f 100%);
  color: #fff;
  padding: 40px 24px 28px;
}
.header-inner { max-width: 1240px; margin: 0 auto; }
.site-title {
  font-family: "Noto Serif JP", serif;
  font-size: 2rem;
  margin: 0 0 8px;
  letter-spacing: .04em;
}
.title-sub {
  display: inline-block;
  margin-left: 14px;
  font-size: 1.05rem;
  font-weight: 600;
  opacity: .85;
  vertical-align: middle;
}
.site-lead { margin: 0 0 18px; opacity: .92; max-width: 760px; }
.stats-row { display: flex; gap: 12px; flex-wrap: wrap; }
.stat-chip {
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 999px;
  padding: 4px 16px;
  font-size: .85rem;
}
.stat-chip b { font-size: 1.05rem; margin-right: 2px; }

/* ===== layout ===== */
.layout {
  max-width: 1240px;
  margin: 24px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(320px, 5fr);
  gap: 20px;
  align-items: start;
}
@media (max-width: 960px) { .layout { grid-template-columns: 1fr; } }

/* ===== map pane ===== */
.map-pane { min-width: 0; }
.map-toolbar { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
#searchBox, #countrySelect {
  font: inherit;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}
#searchBox { flex: 1 1 240px; }
#countrySelect { flex: 0 1 220px; }

.map-wrap {
  position: relative;
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 10px;
}
.map-wrap svg { width: 100%; height: auto; display: block; }
.prefecture { cursor: pointer; transition: opacity .15s; stroke: #fff; stroke-width: 1; }
.prefecture:hover { opacity: .75; }
.prefecture.selected { stroke: var(--akane); stroke-width: 2.5; }
.boundary-line { pointer-events: none; }

.map-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--ai-deep);
  color: #fff;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: .82rem;
  white-space: nowrap;
  z-index: 5;
  box-shadow: var(--shadow);
}
.map-legend {
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: .78rem;
  color: var(--ink-soft);
  margin: 10px 4px 0;
  flex-wrap: wrap;
}
.legend-item { display: flex; align-items: center; gap: 5px; }
.legend-swatch { width: 14px; height: 14px; border-radius: 3px; display: inline-block; }

/* ===== charts ===== */
.chart-card {
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  margin-top: 16px;
}
.chart-card h3 { margin: 0 0 12px; font-size: .95rem; color: var(--ai-deep); }
.bar-row { display: grid; grid-template-columns: 110px 1fr 48px; gap: 8px; align-items: center; margin: 5px 0; font-size: .82rem; }
.bar-row .bar-label { text-align: right; color: var(--ink-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; }
.bar-row .bar-label:hover { color: var(--ai); text-decoration: underline; }
.bar-track { background: var(--map0); border-radius: 4px; height: 16px; overflow: hidden; }
.bar-fill { background: linear-gradient(90deg, var(--ai), #4a86ad); height: 100%; border-radius: 4px; }
.bar-num { color: var(--ink-soft); }

/* ===== list pane ===== */
.list-pane {
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  position: sticky;
  top: 16px;
  max-height: calc(100vh - 32px);
  display: flex;
  flex-direction: column;
}
.list-header { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.list-header h2 {
  font-family: "Noto Serif JP", serif;
  font-size: 1.2rem;
  margin: 0;
  color: var(--ai-deep);
}
.reset-btn {
  font: inherit;
  font-size: .78rem;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 999px;
  padding: 4px 14px;
  cursor: pointer;
}
.reset-btn:hover { border-color: var(--ai); color: var(--ai); }
.list-count { margin: 4px 0 10px; font-size: .8rem; color: var(--ink-soft); }
.pair-list { overflow-y: auto; flex: 1; min-height: 200px; }

.muni-group { margin-bottom: 6px; }
.muni-head {
  font-weight: 700;
  font-size: .92rem;
  color: var(--ai-deep);
  padding: 8px 4px 4px;
  border-bottom: 2px solid var(--line);
}
.muni-head .pref-tag { font-weight: 500; font-size: .75rem; color: var(--ink-soft); margin-left: 8px; }
.pair-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 8px 4px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}
.pair-item:hover { background: #f4f8fb; }
.pair-item .partner { font-weight: 500; }
.pair-item .meta { font-size: .76rem; color: var(--ink-soft); white-space: nowrap; }
.flag { margin-right: 6px; }
.empty-note { color: var(--ink-soft); font-size: .85rem; padding: 20px 4px; }

/* ===== modal ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(22, 52, 77, .55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}
.modal {
  background: var(--paper);
  border-radius: var(--radius);
  max-width: 760px;
  width: 100%;
  max-height: 86vh;
  overflow-y: auto;
  padding: 28px 32px;
  position: relative;
}
.modal-close {
  position: absolute;
  top: 10px;
  right: 14px;
  font-size: 1.5rem;
  border: 0;
  background: none;
  cursor: pointer;
  color: var(--ink-soft);
}
.modal h2 {
  font-family: "Noto Serif JP", serif;
  color: var(--ai-deep);
  margin: 0 0 2px;
  font-size: 1.35rem;
}
.modal .pairing-sub { color: var(--ink-soft); font-size: .85rem; margin: 0 0 16px; }
.modal h3 {
  font-size: .92rem;
  color: var(--akane);
  border-left: 4px solid var(--akane);
  padding-left: 10px;
  margin: 22px 0 8px;
}
.modal p, .modal td { font-size: .9rem; }
.modal .detail-text { white-space: pre-wrap; margin: 0; }
.kv-table { width: 100%; border-collapse: collapse; }
.kv-table th {
  text-align: left;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 6px 12px 6px 0;
  width: 9em;
  vertical-align: top;
  font-size: .85rem;
}
.kv-table td { padding: 6px 0; }
.clair-link { display: inline-block; margin-top: 18px; font-size: .82rem; }

/* ===== footer ===== */
.site-footer {
  max-width: 1240px;
  margin: 30px auto 0;
  padding: 18px 24px 36px;
  font-size: .78rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}