* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: "Segoe UI", sans-serif;
      background: linear-gradient(to bottom right, #f1f1f1, #e0f7fa);
      color: #333;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 2rem;
    }
    .container {
      max-width: 800px;
      background: #fff;
      padding: 2rem;
      border-radius: 12px;
      box-shadow: 0 0 20px rgba(0,0,0,0.1);
      text-align: center;
    }
    h1 {
      color: #00796b;
      margin-bottom: 0.5rem;
    }
    h3 {
      color: #555;
      margin-bottom: 1.5rem;
    }
    p {
      font-size: 1.1rem;
      margin-bottom: 2rem;
    }
    .btns {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1rem;
    }
     a button {
      background-color: #00796b;
      color: white;
      border: none;
      padding: 0.9rem 1.8rem;
      font-size: 1rem;
      border-radius: 8px;
      cursor: pointer;
      transition: 0.3s ease;
    }
    a button:hover {
      background-color: #004d40;
    }
    .footer {
      margin-top: 2rem;
      font-size: 0.9rem;
      color: #777;
    }

    @media (max-width: 600px) {
      .container {
        padding: 1.2rem;
      }
      h1 {
        font-size: 1.6rem;
      }
      p {
        font-size: 1rem;
      }
      a button {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
      }
    }