:root {
  --bg: #fbfbfa;
  --fg: #17181a;
  --muted: #6a6d72;
  --line: #dcdcd8;
  --surface: #f2f2ef;
  --accent: #1f5eff;
  --warn: #a1440c;
  --good: #15683c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101113;
    --fg: #ececea;
    --muted: #94979c;
    --line: #2b2d31;
    --surface: #191b1e;
    --accent: #7ba2ff;
    --warn: #e8a06a;
    --good: #6fd39a;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 17px/1.55 ui-sans-serif, -apple-system, "Segoe UI", system-ui, sans-serif;
  letter-spacing: 0.002em;
}

main { max-width: 74ch; margin: 0 auto; padding: 40px 20px 96px; }

h1 { font-size: 2.1rem; line-height: 1.15; margin: 6px 0 14px; letter-spacing: -0.018em; font-weight: 600; }
h2 { font-size: 1.32rem; line-height: 1.25; margin: 4px 0 10px; letter-spacing: -0.01em; font-weight: 600; }

.kicker {
  font: 500 0.72rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px;
}

.lede .one { font-size: 1.12rem; color: var(--fg); margin: 0 0 22px; }
.so-what { color: var(--muted); font-size: 0.95rem; margin: 14px 0 0; }
.so-what strong { color: var(--fg); font-weight: 600; }
.answer { margin: 0 0 16px; color: var(--fg); }

.panel { border-top: 1px solid var(--line); margin-top: 44px; padding-top: 26px; }
.panel:target { scroll-margin-top: 20px; }

.topnums { display: flex; flex-wrap: wrap; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin: 0 0 22px; }
.topnums div { background: var(--bg); padding: 14px 16px; flex: 1 1 150px; min-width: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 0 -1px -1px 0; }
.topnums b { display: block; font: 600 1.65rem/1.1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.topnums span { display: block; color: var(--muted); font-size: 0.82rem; margin-top: 6px; }
.topnums em { display: block; color: var(--muted); font: 500 0.72rem/1 ui-monospace, monospace; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 8px; font-style: normal; }

.controls { display: flex; flex-wrap: wrap; gap: 18px 26px; align-items: end; margin: 0 0 10px; }
.controls label.check { display: flex; gap: 10px; align-items: center; font-size: 0.92rem; color: var(--fg); flex: 0 1 auto; min-width: 0; }
.controls label.check input { width: 20px; height: 20px; accent-color: var(--accent); margin: 0; }
.controls label { display: block; font-size: 0.9rem; color: var(--muted); flex: 1 1 240px; min-width: 200px; }
.controls output { float: right; color: var(--fg); font: 600 0.9rem/1 ui-monospace, Menlo, monospace; font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; margin: 10px 0 0; accent-color: var(--accent); height: 22px; }

button {
  font: 600 0.95rem/1 inherit; color: var(--fg); background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px; padding: 11px 16px; cursor: pointer;
  min-height: 44px;
}
button:hover { border-color: var(--accent); color: var(--accent); }
button:disabled { opacity: 0.55; cursor: default; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.readout { margin: 14px 0 0; font-size: 0.95rem; }
.readout .muted, .muted { color: var(--muted); }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 8px 10px 8px 0; border-bottom: 1px solid var(--line); font-size: 0.92rem; vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; }
td.num, th.num { text-align: right; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; white-space: nowrap; }
.big { font: 600 1.25rem/1.2 ui-monospace, Menlo, monospace; font-variant-numeric: tabular-nums; }
.before { color: var(--warn); }
.after { color: var(--good); }

.frames { display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; margin: 8px 0 4px; }
figure { margin: 0; min-width: 0; }
figcaption { font-size: 0.82rem; color: var(--muted); margin-bottom: 8px; }
.frame { position: relative; min-width: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.frame-inner { position: relative; transform-origin: top left; }
.card {
  border-radius: 6px; background: var(--bg); overflow: hidden;
  box-shadow: inset 0 0 0 1px var(--line);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: normal;
}
.card h3 { font-weight: 600; letter-spacing: normal; margin: 0; }
.card p { margin: 0; color: var(--muted); }
.card h3, .card p { word-break: break-all; overflow-wrap: anywhere; }
.frame-header { position: absolute; left: 0; top: 0; font: 500 0.8rem/1.2 ui-monospace, monospace; color: var(--muted); }

canvas { display: block; width: 100%; height: 200px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; margin-top: 8px; }

ul.limits { margin: 0; padding-left: 20px; color: var(--muted); font-size: 0.95rem; }
ul.limits li { margin-bottom: 8px; }

.foot { border-top: 1px solid var(--line); margin-top: 44px; padding-top: 20px; color: var(--muted); font-size: 0.88rem; }

.pill { display: inline-block; font: 500 0.78rem/1 ui-monospace, monospace; padding: 5px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); margin-right: 6px; text-transform: none; letter-spacing: 0.02em; }



@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }