body {
      font-family: 'Noto Sans Gujarati', sans-serif;
      background: linear-gradient(to top right, #fff7e6, #ffcc80);
      margin: 0;
      padding: 0;
    }

    .header {
      background-color: #ff7043;
      color: white;
      padding: 20px;
      text-align: center;
    }

    .main {
      max-width: 1000px;
      margin: 0 auto;
      padding: 20px;
    }

    .output-box {
      padding: 20px;
      font-size: 24px;
      background: #fff3e0;
      border: 2px solid #ffccbc;
      border-radius: 10px;
      text-align: center;
      color: #bf360c;
      margin-bottom: 30px;
    }

    .letters {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
      gap: 15px;
    }

    .letter {
      background: linear-gradient(145deg, #ffa726, #fb8c00);
      color: white;
      font-size: 26px;
      border-radius: 12px;
      padding: 15px 0;
      text-align: center;
      cursor: pointer;
      transition: 0.3s ease;
      box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    }

    .letter:hover {
      transform: scale(1.1);
      background: linear-gradient(145deg, #fb8c00, #ef6c00);
    }