styles.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
body{
    background:linear-gradient(270deg ,#3c47e7 0%, #00c6ff 100%);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    width: 100vw;
    height: max-content;
}
.container{
    width: 80%;
    margin: 2em auto;
    max-width: 800px;
    min-width: 300px;
}
.header{
    text-align: center;
    color: #fff;
    margin-bottom: 2em;
}
.header h1{
    font-size: 2.5em;
    font-weight: 600;
    margin-bottom: 0.5em;
}
.description {
    font-size: 1em;
    font-weight: 300;
    font-style: italic;
}
form{
    width: 100%;
    opacity: 0.7;
    border-radius: .5em;
    height: max-content;
    background-color: #3c47e7;
    padding: 3em 2em;
}
.form-group{
    display: block;
    padding:.5rem;
}
label{
    display: block;
    margin-bottom: .5rem;
    color: #fff;
    font-weight: 600;
    font-size: 20px;
}
input{
    width: 100%;
    padding: 1em; 
    border-radius: .5rem;
    font-size: 1rem;

}
p{
    margin: 1rem 0 .5rem 0;
    color: #fff;
    font-size: 20px;
    font-weight: 600;
    
}
select{
    width: 100%;
    padding: .5rem;
    border-radius: .5rem;
    border: none;
    outline: none;
    background-color: #fff;
    color: #000;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    height: 3rem;
    font-size: 1.2rem;

}
input[type="radio"]{
    display: inline;
    width: 4%;
    margin-right: .5rem;
    height: 1.2rem;
}
.input-checkbox{
    display: inline;
    width: 4%!important;
    margin-right: .5rem;
    height: 1.2rem;
}
textarea{
    padding: 1em;
    font-size: 1.2rem;
    border-radius: .5rem;
    width: 100%;
}
#submit{
    width: 100%;
    height: 3rem;
    font-size: 1.3rem;
    font-weight: 600;
    border-radius: .5rem;
    background-color:rgb(54, 182, 54);
    border: none;
}