*{margin:0; padding:0; box-sizing:border-box;}
    body {
      font-family: 'Segoe UI', sans-serif;
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 40px;
    }
    .container {
      max-width: 600px;
      background: rgba(255,255,255,0.95);
      border-radius: 20px;
      padding: 40px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.15);
      position: relative;
      width: 100%;
      text-align: center;
    }

    .back-button {
      position: absolute;
      top: 20px;
      left: 20px;
      background: linear-gradient(45deg, #3498db, #2980b9);
      color: white;
      padding: 10px 20px;
      border-radius: 25px;
      text-decoration: none;
      font-weight: bold;
    }
    .audio-button {
      position: absolute;
      top: 20px;
      right: 20px;
      width: 40px;
      height: 40px;
      background: #fff;
      color: #bbb;
      border: none;
      border-radius: 50%;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: center;
      align-items: center;
      box-shadow: 0 3px 8px rgba(0,0,0,0.2);
      transition: all 0.3s ease;
    }
    .audio-button:hover {
      background: #f0f0f0;
      color: #999;
      transform: scale(1.1);
    }

    .english-name { font-size: 24px; font-weight: bold; margin-bottom: 10px; color:#34495e;}
    .pronunciation { font-size: 18px; color:#666; font-style: italic; margin-bottom: 20px;}
    .definition { font-size:16px; color:#444; background:#f1f3f5; padding:10px; border-radius:10px; margin-bottom:20px; }
    .example { text-align:left; margin-bottom:15px; padding:10px; background:#f8f9fa; border-left:4px solid #007bff; border-radius:8px;}
    .english-sentence { font-size:16px; color:#333; margin-bottom:5px;}
    .spanish-sentence { font-size:14px; font-style:italic; color:#666; margin-left:10px;}
    .spanish-translation { font-size:18px; color:#2c3e50; font-weight:600; margin-top:20px;}