:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --panel: #12151d;
  --border: #232838;
  --text: #e6e8ee;
  --muted: #8b93a7;
  --accent: #5b7cff;
  --up: #35c17a;
  --down: #e5546a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}
header {
  display: flex; align-items: baseline; gap: 1rem;
  padding: 1rem 1.5rem; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: rgba(11,13,18,.9); backdrop-filter: blur(6px);
}
h1 { font-size: 1.1rem; margin: 0; font-weight: 600; letter-spacing: -.01em; }
h2 { font-size: .9rem; margin: 0 0 .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.muted { color: var(--muted); }
.small { font-size: .82rem; }
.status { margin-left: auto; font-size: .85rem; color: var(--muted); }
.status.ok { color: var(--up); }
.status.err { color: var(--down); }
main { padding: 1.5rem; max-width: 1280px; margin: 0 auto; display: grid; gap: 1.25rem; }
.controls {
  display: flex; flex-wrap: wrap; gap: .75rem 1rem; align-items: end;
  background: var(--panel); border: 1px solid var(--border); border-radius: .6rem; padding: 1rem;
}
.controls label { display: flex; flex-direction: column; gap: .25rem; font-size: .78rem; color: var(--muted); }
input, select, button {
  background: #0e1118; color: var(--text); border: 1px solid var(--border);
  border-radius: .4rem; padding: .45rem .6rem; font: inherit;
}
button {
  background: var(--accent); border-color: var(--accent); color: #fff;
  cursor: pointer; font-weight: 600; height: 2.2rem;
}
button:hover { filter: brightness(1.1); }
button:disabled { opacity: .5; cursor: default; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: .6rem; padding: 1rem; }
.hidden { display: none; }
canvas { width: 100%; height: auto; display: block; }
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: .75rem; }
.metric { background: #0e1118; border: 1px solid var(--border); border-radius: .5rem; padding: .7rem .8rem; }
.metric .k { font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.metric .v { font-size: 1.25rem; font-weight: 600; margin-top: .2rem; }
table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th, td { text-align: right; padding: .5rem .6rem; border-bottom: 1px solid var(--border); }
th:first-child, td:first-child, th:nth-child(2), td:nth-child(2) { text-align: left; }
th { color: var(--muted); font-weight: 500; font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; }
.pos { color: var(--up); }
.neg { color: var(--down); }