body {
  font-family: sans-serif;
  text-align: center;
  padding: 20px;
  margin: 0;
  background-color: #fff;
}

#app h1 {
  font-size: 2.5em;
  margin-bottom: 30px;
}

#card-container {
  margin: 20px auto;
  width: 90%;
  max-width: 600px;
}

#card-image {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  border: 4px solid #888;
  border-radius: 16px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

#card-text {
  font-size: 2em;
  padding: 25px;
  border: 2px dashed #666;
  border-radius: 12px;
  background-color: #f1f1f1;
  margin-top: 20px;
  min-height: 120px;
}

#buttons {
  margin-top: 30px;
}

button {
  margin: 10px 6px;
  padding: 18px 30px;
  font-size: 1.5em;
  border: none;
  border-radius: 12px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  transition: background-color 0.2s ease;
}

#right {
  background-color: #28a745;
}
#right:hover {
  background-color: #218838;
}

#wrong {
  background-color: #dc3545;
}
#wrong:hover {
  background-color: #c82333;
}

#shuffle, #answer {
  background-color: #007BFF;
}
#shuffle:hover, #answer:hover {
  background-color: #0056b3;
}

#exit {
  background-color: #6c757d;
}
#exit:hover {
  background-color: #5a6268;
}

#copyright {
  font-size: 0.5em;
  color: #888;
  margin-top: 40px;
}

@media (max-width: 600px) {
  #app h1 {
    font-size: 2.2em;
  }

  #card-text {
    font-size: 1.8em;
    padding: 20px;
  }

  button {
    font-size: 1.4em;
    padding: 16px 28px;
  }
}