:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: #203236;
  background: #f3f6f5;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
.app-header {
  display: flex; justify-content: space-between; gap: 24px; align-items: flex-end;
  padding: 28px max(24px, calc((100vw - 1440px) / 2)); color: white;
  background: linear-gradient(120deg, #173f47, #226b68);
}
.eyebrow { margin: 0 0 6px; color: #a5d9d2; font-size: 11px; font-weight: 700; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(22px, 3vw, 32px); letter-spacing: .02em; }
.subtitle { margin: 7px 0 0; color: #d4e7e4; font-size: 14px; }
.status { flex: none; padding: 8px 12px; border: 1px solid #75aaa4; border-radius: 999px; color: #e6f2f0; font-size: 12px; }
.status::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: #73d5a4; }
.status-error::before { background: #ff9b8a; }
main { max-width: 1440px; margin: 0 auto; padding: 24px; }
.controls, .summary, .chart-card { background: white; border: 1px solid #dce5e3; box-shadow: 0 1px 3px rgba(24, 57, 62, .05); }
.controls { display: grid; grid-template-columns: minmax(130px, .6fr) minmax(160px, .8fr) minmax(220px, 2fr); gap: 16px; padding: 18px; border-radius: 10px; }
label { display: grid; gap: 7px; color: #536569; font-size: 12px; font-weight: 700; }
select, input { width: 100%; height: 42px; padding: 0 12px; border: 1px solid #bccbc9; border-radius: 6px; background: white; color: #203236; font: inherit; font-size: 15px; outline: none; }
select:focus, input:focus { border-color: #237a70; box-shadow: 0 0 0 3px rgba(35, 122, 112, .14); }
.summary { display: flex; align-items: center; gap: 36px; margin: 16px 0; padding: 15px 20px; border-radius: 10px; }
.summary div { display: grid; gap: 2px; }
.summary span { color: #66777a; font-size: 11px; }
.summary strong { font-size: 20px; font-variant-numeric: tabular-nums; }
#selection-label { margin: 0 0 0 auto; color: #52676a; font-weight: 700; }
.chart-card { position: relative; min-height: 420px; padding: 20px; border-radius: 10px; overflow-x: auto; }
.chart-wrap { position: relative; min-width: 680px; }
.loading { position: absolute; z-index: 2; inset: 0; display: grid; place-items: center; border-radius: 10px; background: rgba(255,255,255,.84); color: #52676a; }
.loading[hidden] { display: none; }
.empty { padding: 120px 20px; text-align: center; color: #718084; }
.error { padding: 14px 18px; border: 1px solid #efb2a8; border-radius: 8px; background: #fff1ef; color: #983528; }
@media (max-width: 720px) {
  .app-header { align-items: flex-start; flex-direction: column; padding: 22px 16px; }
  main { padding: 14px; }
  .controls { grid-template-columns: 1fr 1fr; gap: 12px; padding: 14px; }
  .search-label { grid-column: 1 / -1; }
  .summary { gap: 20px; padding: 13px 15px; flex-wrap: wrap; }
  #selection-label { width: 100%; margin: 0; }
  .chart-card { padding: 12px; }
}