:root {
  --blue: #0b5ea7;
  --blue-dark: #083d6e;
  --gold: #c4922e;
  --ink: #0f172a;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #fff;
  --line: #e2e8f0;
  --radius: 10px;
  --sidebar: 310px;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
}
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; background: var(--bg); }
button, input, select { font: inherit; }
.skip { position: fixed; left: 1rem; top: -5rem; z-index: 30; padding: .7rem 1rem; color: #fff; background: var(--ink); }
.skip:focus { top: 1rem; }
.topbar { min-height: 52px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .7rem 1.25rem; color: #fff; background: var(--ink); }
.brand { font-weight: 700; }
.brand::before { content: ""; display: inline-block; width: 9px; height: 9px; margin-right: 10px; border-radius: 50%; background: #22c55e; }
.topbar a { color: #cbd5e1; font-size: .82rem; }
.layout { min-height: calc(100vh - 52px); display: grid; grid-template-columns: var(--sidebar) minmax(0,1fr); }
.sidebar { padding: 1.25rem; border-right: 1px solid var(--line); background: var(--card); }
.eyebrow { margin: 0 0 .35rem; color: var(--blue); font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
h1 { margin: 0 0 .6rem; font-size: 1.65rem; line-height: 1.15; }
.intro { margin: 0 0 1.4rem; color: var(--muted); font-size: .88rem; line-height: 1.55; }
fieldset { min-width: 0; margin: 0 0 1rem; padding: 1rem 0; border: 0; border-top: 1px solid var(--line); }
legend { padding: 0 0 .8rem; color: var(--muted); font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
label { display: block; margin-bottom: .85rem; color: #475569; font-size: .76rem; font-weight: 700; text-transform: uppercase; }
input, select { width: 100%; min-height: 38px; margin-top: .32rem; padding: .45rem .6rem; color: var(--ink); border: 1px solid var(--line); border-radius: 6px; background: var(--bg); }
input:focus, select:focus, button:focus-visible { outline: 3px solid rgba(11,94,167,.24); outline-offset: 1px; border-color: var(--blue); }
.button { width: 100%; min-height: 42px; margin-top: .4rem; border: 0; border-radius: 6px; color: #fff; background: var(--blue); cursor: pointer; font-weight: 700; }
.button:hover { background: var(--blue-dark); }
.button.secondary { color: var(--ink); background: #e7d4aa; }
.button.secondary:hover { background: #dcc18b; }
.status { min-height: 1.4rem; margin: .8rem 0 0; color: var(--muted); font-size: .8rem; }
.note { margin-top: 1.1rem; padding: .85rem; border-left: 3px solid var(--gold); color: var(--muted); background: #fffbeb; font-size: .78rem; line-height: 1.45; }
.content { min-width: 0; padding: 1.4rem; }
.metrics { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: .75rem; margin-bottom: .9rem; }
.metric { padding: .85rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.metric span { display: block; color: var(--muted); font-size: .67rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.metric strong { display: block; margin-top: .25rem; color: var(--blue); font-size: 1.18rem; }
.metric small { display: block; margin-top: .18rem; color: var(--muted); }
.charts { display: grid; grid-template-columns: minmax(0,1fr); gap: .9rem; }
.charts.two { grid-template-columns: repeat(2,minmax(0,1fr)); }
.card { min-width: 0; padding: .9rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.card h2 { margin: 0 0 .4rem; font-size: .9rem; }
.plot { min-height: 390px; }
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  .metrics { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .charts.two { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .content { padding: .85rem; }
  .metrics { grid-template-columns: 1fr; }
  .plot { min-height: 320px; }
}