:root {
  --kg-bg: #0b0d10;
  --kg-card: #14181d;
  --kg-fg: #e7edf3;
  --kg-muted: #9aa7b4;
  --kg-accent: #69aefc;
  --kg-warn: #ffcaa8;
  --kg-error: #ff9a9a;
  --kg-border: #273039;
  color-scheme: dark light;
}
@media (prefers-color-scheme: light) {
  :root {
    --kg-bg: #f4f6f8;
    --kg-card: #ffffff;
    --kg-fg: #182028;
    --kg-muted: #566370;
    --kg-accent: #1f6dd6;
    --kg-warn: #8a4b1e;
    --kg-error: #b3261e;
    --kg-border: #d7dde3;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--kg-bg);
  color: var(--kg-fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 24px 16px;
}
.kg-card {
  width: 100%;
  max-width: 480px;
  background: var(--kg-card);
  border: 1px solid var(--kg-border);
  border-radius: 16px;
  padding: 24px;
}
.kg-title { margin: 0 0 4px; font-size: 1.25rem; }
.kg-intro, .kg-status { color: var(--kg-muted); }
.kg-warn { color: var(--kg-warn); font-weight: 600; }
.kg-warn--screenshot { font-weight: 500; }
.kg-honest { color: var(--kg-muted); font-size: 0.9rem; border-top: 1px solid var(--kg-border); padding-top: 12px; }
.kg-error { color: var(--kg-error); min-height: 1.25rem; }
.kg-words {
  list-style: none;
  margin: 16px 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.kg-words li {
  display: flex;
  gap: 8px;
  align-items: baseline;
  background: var(--kg-bg);
  border: 1px solid var(--kg-border);
  border-radius: 8px;
  padding: 8px 10px;
}
.kg-word-index { color: var(--kg-muted); font-variant-numeric: tabular-nums; min-width: 1.5em; text-align: right; }
.kg-word-text { font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 1.05rem; }
.kg-actions { display: flex; gap: 8px; margin: 12px 0; }
.kg-actions button {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--kg-border);
  background: transparent;
  color: var(--kg-fg);
  cursor: pointer;
}
.kg-primary {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: var(--kg-accent);
  color: #06121f;
  font-weight: 700;
  cursor: pointer;
}
.kg-verify-field { display: block; margin: 10px 0; }
.kg-verify-field input,
.kg-unlock-form textarea {
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--kg-border);
  background: var(--kg-bg);
  color: var(--kg-fg);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
}
@media print {
  body { background: #fff; color: #000; }
  .kg-actions, .kg-primary, .kg-honest, .kg-status { display: none; }
}