:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: #0f1320;
  color: #f5f7ff;
}

.app {
  max-width: 860px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 14px;
}

.card {
  background: #1b2130;
  border: 1px solid #2a3347;
  border-radius: 12px;
  padding: 16px;
}

h1, h2 {
  margin: 0 0 10px;
}

.muted {
  color: #b9c2d9;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 12px;
  cursor: pointer;
  font-weight: 600;
  color: #111;
  background: #ffd54f;
}

button:hover {
  filter: brightness(0.97);
}