* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  margin: 0;
  background: #f7fbff;
  color: #1b1f23;
}
header { padding: 18px 20px; background: #e9f4ff; border-bottom: 1px solid #d3e8ff; }
h1 { margin: 0 0 10px; font-size: 20px; }
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.toolbar button { padding: 6px 12px; border: 1px solid #9cc9ff; background: #fff; border-radius: 6px; cursor: pointer; }
.toolbar button:hover { background:#f1f7ff; }

.map {
  display: block;
  margin: 24px auto;
  width: min(92vw, 700px);
  height: auto;
  background: #fff;
  border: 1px solid #d9e4f2;
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(20,50,80,.06);
}