:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --fg: #16181d;
  --muted: #5d6470;
  --card: #ffffff;
  --border: #dde1e7;
  --ok: #1f7a4d;
  --warn: #9a5b00;
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --fg: #e8eaee;
    --muted: #9aa1ad;
    --card: #1a1d23;
    --border: #2c3038;
    --ok: #4cc38a;
    --warn: #f0b35a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--fg);
  padding: 16px;
}

.card {
  width: 100%;
  max-width: 440px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

h1 {
  margin: 0 0 4px;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0 0 20px;
  color: var(--muted);
}

.checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.checks li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
}

.ok {
  color: var(--ok);
}

.warn {
  color: var(--warn);
}

.footer {
  margin: 20px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.bench {
  margin-top: 20px;
  display: grid;
  gap: 8px;
}

.bench button {
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  cursor: pointer;
}

.bench button:disabled {
  cursor: progress;
  opacity: 0.6;
}

.bench-result {
  margin: 0;
  min-height: 1.4em;
  font-size: 14px;
  color: var(--muted);
}