* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

#app {
  padding: 20px;
}

h1 {
  font-size: 22px;
  margin-bottom: 4px;
}

#subtitle {
  font-size: 14px;
  opacity: 0.7;
  margin-bottom: 20px;
}

.card {
  background: #020617;
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 20px;
}

button {
  width: 100%;
  padding: 14px;
  border-radius: 14px;
  border: none;
  background: #22c55e;
  color: #052e16;
  font-size: 16px;
  font-weight: 600;
}