style.css

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,700&family=Red+Hat+Display:wght@500;700;900&display=swap');

:root{
    --Pale-blue: hsl(225, 100%, 94%);
    --Bright-blue: hsl(245, 75%, 52%);
    --Very-pale-blue: hsl(225, 100%, 98%);
    --Desaturated-blue: hsl(224, 23%, 55%);
    --Dark-blue: hsl(223, 47%, 23%);
}

body{
    background-color: hsl(225, 100%, 94%);
    font-size: 16px;
    font-family: 'Red Hat Display', sans-serif;
    background-image: url(./images/pattern-background-mobile.svg);
    background-repeat: no-repeat;
    background-size: 100%;
}
*{
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    line-height: 1.5;
}
.container{
    width: 350px;
    height: 590px;
    background-color:white;
    border-radius: 15px;
    margin: 30px auto ;
    overflow: hidden;
    justify-content: center;
    text-align: center;
    box-sizing: border-box;
}

.container-image{
    width: 100%;
}
.title{

   color: var(--Dark-blue); 
   margin: 1em auto .5em;
   font-weight: 900
}
.description{
    color: var(--Desaturated-blue);
    margin: 1em 2.5em;
}
.plan-box{ 
    background-color: var(--Very-pale-blue);
    display: flex;
    width: 300px;
    height: 80px;
    margin: 1.7em auto;
    border-radius: 12px;
    font-size: 1em;
    align-items: center;
}
.plan-box-title{
    color: var(--Dark-blue);
    font-size: 1em;
}
.plan-box-price{
    color: var(--Desaturated-blue);
    text-align: left;
    font-size: 1em;
    margin-left: .3em;
    
}
.plan-box-img{
    width: 50px;
    height: 50px;
    margin: 1.2em ;
}

.plan-box-change{
    margin-left:3.5em;
    font-weight: bold;
    font-size: .9em;
}
.plan-box-change:hover{
    color:hwb(245 40% 5%);
    text-decoration: none;
}
.pay-button{
    width: 300px;
    height: 50px;
    background-color: var(--Bright-blue);
    font-weight:bold;
    color: white;
    font-size: 1.1em;
    border: none;
    border-radius: 12px;
    box-shadow: 0px 10px 20px hsl(246, 48%, 76%);
    cursor: pointer;
}
.pay-button:hover{
    background-color: hwb(245 40% 5%) ;
}

.cancel-button{
    background-color: white;
    color:var(--Desaturated-blue);
    font-size: 1.1em;
    font-weight:bolder;
    border: none;
    margin: 1.7em auto;
    cursor: pointer;
}
.cancel-button:hover{
    color: var(--Dark-blue);
}

/*-------DESKTOP DESING---------*/
@media (min-width:400px){
    body{
        background-image: url(./images/pattern-background-desktop.svg);
        background-repeat: no-repeat;
        background-size: 100%;
    }
    .container{
        margin: 150px auto;
        width: 400px;
        height: 630px;
    }
}
/*-------code by @MisaelCamarena---------*/