* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: 'Red Hat Display', sans-serif;
    background-color: hsl(225, 100%, 94%);
    background-image: url('images/pattern-background-mobile.svg');
    background-repeat: no-repeat;
    background-size: contain;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1.5rem;
  }
  
  
  .card {
    background: white;
    width: 100%;
    max-width: 375px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  }
  
  .hero-img {
    width: 100%;
    display: block;
  }
  
  .card-body {
    padding: 2rem;
    text-align: center;
  }
  
  .card-body h1 {
    color: hsl(223, 47%, 23%);
    margin-bottom: 1rem;
    font-size: 1.5rem;
  }
  
  .card-body p {
    color: hsl(224, 23%, 55%);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
  }
  
  
  .plan {
    background: hsl(225, 100%, 98%);
    border-radius: 10px;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
  }
  
  .plan img {
    width: 40px;
    margin-right: 1rem;
  }
  
  .plan div {
    flex: 1;
    text-align: left;
  }
  
  .plan strong {
    display: block;
    font-size: 0.95rem;
    color: hsl(223, 47%, 23%);
  }
  
  .plan span {
    color: hsl(224, 23%, 55%);
    font-size: 0.85rem;
  }
  
  .plan a {
    color: hsl(245, 75%, 52%);
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: underline;
  }
  
  .plan a:hover {
    color: hsl(245, 75%, 65%);
    text-decoration: none;
  }
  
  
  .btn {
    display: block;
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
  }
  
  .primary {
    background-color: hsl(245, 75%, 52%);
    color: white;
    margin-bottom: 1rem;
    box-shadow: 0 10px 20px rgba(56, 44, 255, 0.2);
  }
  
  .primary:hover {
    background-color: hsl(245, 75%, 60%);
  }
  
  .secondary {
    background: none;
    color: hsl(224, 23%, 55%);
  }
  
  .secondary:hover {
    color: hsl(223, 47%, 23%);
  }
  

  @media (min-width: 768px) {
    body {
      background-image: url('images/pattern-background-desktop.svg');
      background-size: cover;
      padding: 2rem;
    }
  
    .card {
      max-width: 450px;
    }
  
    .card-body h1 {
      font-size: 1.75rem;
    }
  
    .card-body p {
      font-size: 1rem;
    }
  }