index.css

*  {
    margin: 0%;
    padding: 0%;
}
html {
    box-sizing: border-box;
  }
  
  *,
  *::before,
  *::after {
    box-sizing: inherit
  }

body  {
    background-color: hsl(225, 100%, 94%);
    background-image: url(images/pattern-background-desktop.svg);
    background-repeat: no-repeat;
    background-size: contain;
    min-height: 100vh;
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-family: 'Red Hat Display', sans-serif;
}

.container  {
    background-color: white;
    max-width: 350px;
    align-items: center;
    margin: 10px  auto;
    border-radius: 20px;
    overflow: hidden;
}

.text-container  {
    padding: 7%;
    text-align: center;
}

h2  {
    text-align: center;
    color: hsl(223, 47%, 23%); 
    font-weight: 900;
    margin-bottom: 15px;
}

p  {
    font-size: 16px;
    color: hsl(224, 23%, 55%);
}

.subtitle  {
    margin-bottom: 15px;
}

.box  {
    background-color: hsl(225, 100%, 98%);
    align-items: center;
    display: flex;
    justify-content: space-between;
    padding: 20px;
    border-radius: 12px;
}

.box-left  {
    display: flex;
}

h5 , .price  {
    margin-left: 20px;
}

.proceed-btn  {
    background-color: hsl(245, 75%, 52%);
    display: block;
    text-decoration: none;
    color: white;
    padding: 15px 0;
    border-radius: 12px;
    margin: 15px 0;
}

.cancel-btn  {
    text-decoration: none;
    color: hsl(224, 23%, 55%);
    font-weight: 900;
}

.cancel:hover  {
    text-decoration: none;
    transition: ease;
}

.proceed-btn:hover  {
    background-color: hsl(223, 47%, 23%);
}

@media only screen  and (max-width:425px;)  {
    .container {
        max-width: 350px;
      }
    
    body {
        background-image: url(images/pattern-background-mobile.svg);
    }
}