* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background: #0f0f0f;
    color: #fff;
    font-family: 'Segoe UI', sans-serif;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .container {
    text-align: center;
    animation: fadeIn 1.2s ease-in-out;
  }
  
  .logo {
    font-size: 3.5rem;
    margin-bottom: 1rem;
  }
  
  h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
  }
  
  .tagline {
    font-size: 1.25rem;
    color: #aaa;
  }
  
  .sub {
    margin-top: 0.5rem;
    color: #777;
  }
  
  button {
    margin-top: 2rem;
    padding: 10px 20px;
    background: #00bcd4;
    color: #fff;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
  }
  
  button:hover {
    background: #0097a7;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }