body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom, #000428, #004e92);
  background: radial-gradient(circle, #000428, #004e92);
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
}

#quiz-container {
  width: 750px;
  height: 550px;
  box-sizing: border-box;
  margin: 0 auto;
  text-align: center;
  padding: 2rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#drop-zone > p {
  margin: 0;
}

button {
  font-size: 1.5rem;
  padding: 10px 20px;
  min-width: 120px;
  margin-top: 20px;
  cursor: pointer;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
}

button:disabled {
  background-color: #b0b0b0;
}

h1 {
  font-size: 2rem;
  margin-bottom: 20px;
  text-align: center;
  color: white;
}

#question {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

#score {
  font-weight: bold;
  font-size: 1.2rem;
}

.drop-area {
  width: 100%;
  height: 140px;
  border: 2px dashed #007bff;
  border-radius: 10px;
  background-color: rgba(240, 248, 255, 0.8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
  font-weight: bold;
  color: #007bff;
  padding: 1rem 0;
  text-align: center;
  transition: background-color 0.3s ease-in-out;
}

.draggable-option {
  padding: 10px;
  background-color: #007bff;
  color: white;
  border-radius: 5px;
  cursor: grab;
  margin: 5px;
  display: inline-block;
  min-width: 75px;
}

div {
  border: 3px;
}

#options {
  width: 100%;
  display: flex;
  justify-content: center;
  flex-direction: row;
  margin: 1.5rem 0;
}

.draggable-option.ui-draggable-disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

#progress-bar-container {
  width: 100%;
  max-width: 750px;
  margin: 0 auto 1rem auto;
  text-align: center;
}

#progress-bar {
  height: 12px;
  width: 100%;
  max-width: 750px;
  background: #c4c4c4;
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

#progress-fill {
  height: 100%;
  width: 0%;
  background: #007bff;
  transition: width 0.4s ease-in-out;
}