body {
    background: radial-gradient(circle at top right, #334, #000);
    color: #eee;
    font-family: Nunito, sans-serif;
    min-height: 100vh;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    margin: 0;
  }
  h1.main-title {
    color: #ffdd57;
    font-size: 2.2rem;
    margin: 1rem 0 1rem 0;
    text-align: center;
    text-shadow: 0 0 10px #ffdd57;
  }
  .progress-bar {
    width: 80%;
    background: #222;
    border-radius: 2rem;
    height: 1rem;
    overflow: hidden;
    margin-bottom: 1rem;
  }
  .progress-fill {
    background: linear-gradient(90deg, #00c853, #b2ff59);
    height: 100%;
    width: 0%;
    transition: width 0.4s;
  }
  .timer-bar {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #fff;
  }
  select {
    padding: 0.5rem;
    background: #222;
    color: white;
    border: none;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
  }
  .card {
    background: rgba(255,255,255,0.08);
    border-radius: 1.5rem;
    padding: 2rem;
    width: 100%;
    max-width: 800px;
    text-align: center;
    backdrop-filter: blur(8px);
  }
  h1 {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 1rem;
  }
  .question {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: #ccc;
  }
  .answer-preview {
    font-size: 1.5rem;
    letter-spacing: 1px;
    margin-bottom: 1rem;
  }
  .char {
    padding: 0 0.1rem;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
  }
  .correct {
    color: #00e676;
    text-shadow: 0 0 8px #00e676;
  }
  .current {
    border-bottom: 2px solid orange;
  }
  .incorrect {
    color: #ff1744;
    border-bottom: 2px solid #ff1744;
  }
  input {
    opacity: 0;
    position: absolute;
    pointer-events: none;
  }