:root {
  --bg: #0a0e1a; --card: #111827; --line: #1e2d45; --fg: #e2e8f0; --muted: #94a3b8; --dim: #64748b;
  --accent: #0ea5e9; --accent-2: #38bdf8; --good: #34d399; --warn: #fbbf24; --bad: #f87171;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
#tester { display: grid; gap: 16px; }
html, body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 480px; margin: 0 auto; padding: max(20px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 40px max(16px, env(safe-area-inset-left)); display: grid; gap: 16px; }
header { display: grid; gap: 2px; }
.brand { margin: 0; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-2); font-weight: 600; }
h1 { margin: 0; font-size: 28px; }
.event { margin: 0; color: var(--muted); font-size: 14px; min-height: 1em; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; display: grid; gap: 8px; }
label { font-size: 13px; color: var(--muted); margin-top: 4px; }
.optional { color: var(--dim); }
input, select { width: 100%; font: inherit; color: var(--fg); background: #0b1222; border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { font: inherit; border: 0; border-radius: 12px; padding: 13px 16px; background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; }
button:disabled { opacity: .6; cursor: default; }
.run { min-height: 120px; display: grid; place-items: center; gap: 4px; font-size: 20px; border-radius: 18px; background: linear-gradient(180deg, #0ea5e9, #0284c7); }
.runValue { font-size: 40px; font-variant-numeric: tabular-nums; font-weight: 700; }
.runValue:empty { display: none; }
.result .row { display: flex; justify-content: space-between; align-items: baseline; padding: 4px 0; border-bottom: 1px solid var(--line); }
.result .row:last-of-type { border-bottom: 0; }
.result b { font-size: 22px; font-variant-numeric: tabular-nums; }
.hint { margin: 0; font-size: 13px; color: var(--dim); }
.hint.warn { color: var(--warn); opacity: .85; }
.error { margin: 0; color: var(--bad); font-size: 14px; min-height: 0; }
.error:empty { display: none; }
.small { margin: 0; font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--dim); }
ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 14px; }
li { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); }
li b { color: var(--fg); font-weight: 500; font-variant-numeric: tabular-nums; white-space: nowrap; }
.link { background: none; color: var(--dim); font-weight: 400; padding: 8px; justify-self: center; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }