style.css

html{
    font-size: 62.5%;
}
body{
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
background-color: #f5f5f5;

}
form{
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 1.5rem;
   padding: 16rem;
   justify-content: center;
}

h1{
    font-size: 3.2rem;
    font-weight: 780;
    margin-bottom: 1.7rem;
}

div{
    padding: .2rem;
    margin: .3rem;
    transition: border .15s, box-shadow .15s;
}

#email, #password {
    padding: 1.4rem 2rem 1.4rem 2rem;
    border-radius: 10px;
    border: 1px solid #ced4da;
    width: 25rem;
    transition: border .3s, box-shadow .2s;
}

button{
    background-color: #0d6efd;
    border: none;
    border-radius: 20rem;
    padding: 1.4rem;
    width: 28rem;
    color: white;
}

.checkbox{
    font-size: 1.4rem;
    padding: 1rem;
    font-weight: 400;
    margin: 1px;
   
}

.muted{
    color: gray;
}

input#email:focus, #password:focus{
    border: 1px solid #86b7fe;
    outline: none;
    box-shadow: 0 0 0 3px #b9d3fa;
}

button:hover{
    background-color: #2874e6d3;
    transition-duration: .19s;
}