style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto+Flex:opsz,wght@8..144,300;8..144,400&display=swap');


*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    
    font-family: 'Roboto Flex', sans-serif;
    cursor: pointer;
}

body{
    height: 100vh;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(to right, #3f5efb,#fc466b);
}

form:before{
    content: '';
    position: absolute;
    bottom: 3%;
    right: 28%;
    width: 200px;
    height: 200px;
    background: magenta;
    border-radius: 50%;
    z-index: -1;
    opacity: .8;
}

form:after{
    content: '';
    position: absolute;
    top: 3%;
    left: 28%;
    width: 120px;
    height: 120px;
    background: magenta;
    border-radius: 50%;
    z-index: -1;
    opacity: .8;
}

form{
    width: 25rem;
    height: 28rem;
    display: flex;
    flex-direction: column;
    background: rgba(255,255,255,0.06);
    box-shadow: 0 8px 32px 0 rgba(31,38,135,.37);
    border-radius: 30px;
    border-left: 1px solid rgba(255,255,255,.3);
    border-top: 1px solid rgba(255,255,255,.3);
    
    

}

h1{
    font-size: 30px;
    text-align: center;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,.2);
    letter-spacing: 3px;
    margin-top: 5%;
    opacity: .7;


}

label{
    font-size: 20px;
    color: white;
    margin-left: 10%;
    opacity: 0.8;
    text-shadow: 2px 2px 4px rgba(0,0,0,.2);
}

input{
    width: 80%;
    margin: 5% auto;
    margin-bottom: 8%;
    border: none;
    outline: none;
    background: transparent;
    color: white;
    border-bottom: 1px solid rgba(255, 255  , 255, 0.6);
    opacity: .8;

}

button{
    width: 50%;
    margin: 3% auto;
    color: white;
    font-size: 15px;
    opacity: .7;
    background: rgba(255, 255  , 255, 0.6);
    padding: 10px 30px ;
    border: none;
    outline: none;
    border-radius: 20px;
    text-shadow: 2px 2px 4px rgba(255, 255  , 255, 0.2);
    box-shadow: 3px 3px 5px rgba(31, 38, 135, .37);
    border-left: 1px solid rgba(255,255,255,.3);
    border-top: 1px solid rgba(255,255,255,.3);
}

a{
    font-size: 16px;
    text-align: center;
    color: white;
    opacity: .7;
}