* {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: Arial, sans-serif;
    }

    body {
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      background: linear-gradient(135deg, #74ebd5, #9face6);
      padding: 20px;
    }

    .quiz-card {
      width: 100%;
      max-width: 600px;
      background: white;
      border-radius: 24px;
      padding: 30px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
      text-align: center;
    }

    h1 {
      color: #333;
      margin-bottom: 10px;
    }

    .subtitle {
      color: #666;
      margin-bottom: 25px;
    }

    .info-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 20px;
      color: #444;
      font-weight: bold;
    }

    #question {
      font-size: 24px;
      margin-bottom: 25px;
      color: #222;
    }

    .answers {
      display: grid;
      gap: 12px;
    }

    .answer-btn {
      border: none;
      padding: 15px;
      border-radius: 14px;
      background: #f1f3ff;
      color: #222;
      font-size: 18px;
      cursor: pointer;
      transition: 0.2s;
    }

    .answer-btn:hover {
      background: #dfe4ff;
      transform: scale(1.02);
    }

    .correct {
      background: #b7f7c2 !important;
    }

    .wrong {
      background: #ffb3b3 !important;
    }

    #message {
      min-height: 30px;
      margin-top: 20px;
      font-size: 20px;
      font-weight: bold;
    }

    .next-btn,
    .restart-btn {
      margin-top: 20px;
      border: none;
      padding: 14px 24px;
      border-radius: 999px;
      background: #5b6cff;
      color: white;
      font-size: 17px;
      cursor: pointer;
      display: none;
    }

    .next-btn:hover,
    .restart-btn:hover {
      background: #3f4ee8;
    }

    .hidden {
      display: none;
    }

    .result-box {
      margin-top: 20px;
    }

    .big-score {
      font-size: 42px;
      margin: 20px 0;
      color: #5b6cff;
    }