body {
      font-family: 'Segoe UI', sans-serif;
      background: linear-gradient(135deg, #e0f7fa, #ffffff);
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      margin: 0;
    }

    .container {
      background: white;
      padding: 2rem;
      border-radius: 20px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.1);
      width: 100%;
      max-width: 400px;
      text-align: center;
    }

    h1 {
      color: #00796b;
      margin-bottom: 1rem;
    }

    label {
      display: block;
      text-align: left;
      margin: 0.5rem 0 0.25rem;
      color: #333;
    }

    input {
      width: 100%;
      padding: 0.5rem;
      margin-bottom: 1rem;
      border: 1px solid #ccc;
      border-radius: 8px;
    }

    button {
      background: #00796b;
      color: white;
      border: none;
      padding: 0.75rem 1.5rem;
      border-radius: 10px;
      cursor: pointer;
      font-size: 1rem;
      transition:  0.3s;
    }

    button:hover {
      background: #004d40;
    }

    .result {
      margin-top: 1.5rem;
      font-size: 1.2rem;
      color: #333;
    }