body {
  font-family: "Segoe UI", sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 0;
}

.app-container {
  max-width: 800px;
  margin: auto;
  padding: 20px;
}

h1 {
  text-align: center;
  color: #2b2b2b;
}

.card {
  background: white;
  padding: 20px;
  margin: 15px 0;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

input, textarea {
  width: 100%;
  margin: 8px 0;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ddd;
  font-size: 14px;
}

button {
  background: #0078d7;
  color: white;
  padding: 10px 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background: #005fa3;
}

.flashcard {
  background: #f1f8ff;
  padding: 12px;
  margin: 10px 0;
  border-radius: 10px;
}