:root {
  --demo-ink: #12263f;
  --demo-muted: #5c6b7a;
  --demo-line: #dde4ec;
  --demo-bg: #f5f7fa;
  --demo-accent: #0A2B5C;
  --demo-accent-ink: #ffffff;
  --demo-ok: #2f7a4f;
  --demo-warn: #b3261e;
  --demo-radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--demo-bg);
  color: var(--demo-ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

a { color: var(--demo-accent); }

.card {
  background: #fff;
  border: 1px solid var(--demo-line);
  border-radius: var(--demo-radius);
  padding: 24px;
}

button, .button {
  font: inherit;
  border-radius: 8px;
  border: 1px solid var(--demo-line);
  background: #fff;
  color: var(--demo-ink);
  padding: 9px 14px;
  cursor: pointer;
}

button.primary {
  background: var(--demo-accent);
  border-color: var(--demo-accent);
  color: var(--demo-accent-ink);
  font-weight: 600;
}

button:disabled { opacity: .55; cursor: default; }

input, select, textarea {
  font: inherit;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--demo-line);
  border-radius: 8px;
  background: #fff;
  color: var(--demo-ink);
}

.muted { color: var(--demo-muted); }
.small { font-size: 13px; }
.notice { border-radius: 8px; padding: 10px 12px; font-size: 13px; }
.notice.ok { background: #eaf4ee; color: var(--demo-ok); }
.notice.warn { background: #fbeceb; color: var(--demo-warn); }