:root {
  --bg: #f6f7f9; --card: #ffffff; --text: #1d2330; --muted: #6b7385; --line: #e3e6ec;
  --c1: #3b6fd8; --c2: #e8833a; --c3: #8a94a6; --c4: #2fa37a; --bad: #d64545;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171d; --card: #1c2028; --text: #e6e9ef; --muted: #9aa3b5; --line: #2c323d;
          --c1: #6f9bf0; --c2: #f0a062; --c3: #7d879a; --c4: #4cc495; --bad: #f06a6a; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; overflow-x: hidden; padding: 20px 24px 40px; background: var(--bg); color: var(--text);
       font: 14px/1.5 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 12px; }
h1 { font-size: 20px; margin: 0 0 4px; }
.sub, .hint, footer { color: var(--muted); margin: 0; }
.hint { margin-top: 8px; min-height: 1.5em; }
.controls { display: flex; flex-wrap: wrap; gap: 12px; }
label { color: var(--muted); font-size: 13px; display: flex; align-items: center; gap: 6px; }
select { font: inherit; color: var(--text); background: var(--card); border: 1px solid var(--line);
         border-radius: 6px; padding: 4px 8px; }
.last { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.pill { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; font-size: 13px; }
.pill.stale { border-color: var(--bad); color: var(--bad); }
main { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(520px, 100%), 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; min-width: 0; }
.card h2 { font-size: 15px; margin: 0 0 2px; }
.totals { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.totals b { color: var(--text); font-weight: 600; }
.plot { position: relative; height: 240px; }
footer { margin-top: 24px; font-size: 12px; }
@media (max-width: 640px) {
  body { padding: 12px 16px 32px; font-size: 13px; }
  h1 { font-size: 17px; }
  header { display: block; }
  .controls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 10px; }
  label { flex-direction: column; align-items: stretch; gap: 2px; font-size: 12px; }
  select { width: 100%; padding: 6px 4px; font-size: 14px; }
  .last { gap: 6px; }
  .pill { font-size: 12px; padding: 2px 10px; }
  main { grid-template-columns: 1fr; gap: 12px; }
  .card { padding: 12px; }
  .totals { font-size: 12px; }
  .plot { height: 210px; }
}