body {
  font-family: Arial;
  margin: 0;
  background: #f5f5f5;
}

header {
  background: #111;
  color: white;
  padding: 15px;
}

.container {
  padding: 15px;
}

.card {
  background: white;
  padding: 10px;
  margin: 10px 0;
  border-radius: 8px;
}

button {
  padding: 8px;
  border: none;
  cursor: pointer;
  background: black;
  color: white;
}

input {
  padding: 8px;
  width: 100%;
  margin: 5px 0;
}

.debug {
  background: black;
  color: lime;
  padding: 10px;
  font-size: 12px;
}