* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    padding: 0;
    background-color: #0f0f3e; 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  h1 {
    font-size: 16vh; 
    text-align: center;
    margin-top: 2vh;
    margin-bottom: 2vh;
    width: 100%;
    color: #00ffe5;
    text-shadow: 2px 2px 10px #0ff;
    font-weight: 800;
  }
  
  .container {
    background: #1c1c4a;
    border-radius: 16px;
    padding: 2rem;
    max-width: 600px;
    width: 90%;
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.3);
    text-align: center;
  }
  
  .hidden {
    display: none;
  }
  
  #quiz-settings,
  #quiz-box,
  #result-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  button {
    background: #00ffe5;
    border: none;
    color: #000;
    font-size: 1.1rem;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px #009688;
    transition: transform 0.2s ease;
    cursor: pointer;
    font-weight: bold;
  }
  
  button:hover {
    transform: translateY(-3px);
  }
  
  button:active {
    transform: translateY(1px);
  }
  
  select {
    padding: 0.5rem;
    border-radius: 6px;
    font-size: 1rem;
    border: none;
  }
  
  h2 {
    font-size: 1.4rem;
    color: #00eaff;
  }
  
  p {
    font-size: 1.2rem;
  }
  
  @keyframes bounce {
    0%   { transform: scale(1); }
    25%  { transform: scale(1.1); }
    50%  { transform: scale(0.95); }
    75%  { transform: scale(1.05); }
    100% { transform: scale(1); }
  }
  
  .bounce {
    animation: bounce 0.3s ease;
  }