body {
  margin: 0;
  background: #0b1020;
  color: #fff;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

header, footer {
  text-align: center;
  padding: 16px;
}

.subtitle {
  color: #b0b8ff;
  font-size: 0.9em;
}

.card {
  background: #121a35;
  margin: 12px;
  padding: 16px;
  border-radius: 12px;
}

label {
  display: block;
  margin-top: 12px;
  font-size: 0.85em;
  color: #cfd6ff;
}

input, select, button {
  width: 100%;
  margin-top: 6px;
  padding: 10px;
  border-radius: 8px;
  border: none;
}

button {
  background: #377dff;
  color: #fff;
  margin-top: 16px;
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.result {
  background: #1b2555;
  padding: 10px;
  border-radius: 8px;
  margin-top: 8px;
}

.hint {
  font-size: 0.85em;
  color: #aaa;
}