:root {
  --ground: #e8edef;
  --panel: #f7f9fa;
  --ink: #14202a;
  --muted: #5b6b76;
  --line: #c5cfd5;
  --accent: #0a6c8b;
  --warn: #b26b00;
  --bad: #b3261e;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #10191f;
    --panel: #172229;
    --ink: #e6edf0;
    --muted: #93a3ad;
    --line: #2a3a44;
    --accent: #4cc2e2;
    --warn: #e0a040;
    --bad: #ff7b72;
  }
}
* { box-sizing: border-box; }
html { background: var(--ground); color: var(--ink); font: 16px/1.5 var(--font); }
body { margin: 0; min-height: 100vh; }
h1, h2, p { margin: 0; }
h1 { font-size: 1.5rem; font-weight: 650; letter-spacing: -0.01em; }
h2 { font-size: 1rem; font-weight: 600; }
.muted { color: var(--muted); }
.big { font-size: 2.5rem; font-weight: 650; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }

button {
  font: inherit; font-weight: 600; cursor: pointer;
  background: var(--accent); color: var(--panel);
  border: 0; border-radius: 6px; padding: 0.6rem 1rem;
}
button.quiet { background: transparent; color: var(--ink); border: 1px solid var(--line); }
button:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* login */
.login { max-width: 22rem; margin: 18vh auto 0; padding: 0 1.25rem; display: grid; gap: 1rem; }
.login form { display: grid; gap: 0.5rem; }
.login input {
  font: inherit; padding: 0.6rem 0.75rem; border-radius: 6px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
}
.login button { margin-top: 0.5rem; }
.error { color: var(--bad); font-weight: 600; }

/* dashboard */
.dash { max-width: 46rem; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; display: grid; gap: 2rem; }
.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.status { color: var(--muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.status.error { color: var(--bad); }

.cpu { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 1.25rem; display: grid; gap: 1.25rem; }
.cpu-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.5rem; }
.cores { display: flex; gap: 0.75rem; height: 9rem; }
.core { flex: 1; position: relative; background: var(--ground); border-radius: 6px; overflow: hidden; }
.core-fill { position: absolute; left: 0; right: 0; bottom: 0; height: 0; background: var(--accent); transition: height 0.5s ease; }
.core-fill[data-level="mid"] { background: var(--warn); }
.core-fill[data-level="high"] { background: var(--bad); }
.core span { position: absolute; left: 0.5rem; top: 0.35rem; font-size: 0.8rem; color: var(--muted); font-variant-numeric: tabular-nums; }

.rows { border-top: 1px solid var(--line); }
.row { display: grid; grid-template-columns: 6.5rem 1fr minmax(9rem, auto); align-items: center; gap: 1rem; padding: 0.9rem 0; border-bottom: 1px solid var(--line); }
.row[hidden] { display: none; }
.k { font-weight: 600; }
.v { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.meter { height: 0.6rem; background: var(--line); border-radius: 99px; overflow: hidden; }
.meter i { display: block; height: 100%; width: 0; background: var(--accent); transition: width 0.5s ease; }
.meter i[data-level="mid"] { background: var(--warn); }
.meter i[data-level="high"] { background: var(--bad); }

.row.stale .meter { opacity: 0.35; }

@media (max-width: 30rem) {
  .row { grid-template-columns: 1fr auto; }
  .row .meter { grid-column: 1 / -1; order: 3; }
  .cores { height: 7rem; gap: 0.5rem; }
}
@media (prefers-reduced-motion: reduce) {
  .core-fill, .meter i { transition: none; }
}