styles.css

html, body{
    margin: 0;
    box-sizing: border-box;
    background: #F5F5F5;
}

.container{
    max-width: 1200px;
    padding: 0 20px;
    margin: 60px auto;
    /* border: 1px solid blue; */
}

.form-container{
    padding: 50px;
    /* border: 1px solid red; */
    background-color: white;
    border-radius: 8px;
}

form{
    padding:15px;
    /* border: 1px solid rgb(108, 0, 150); */

}

h1{
    text-align: center;
    padding: 8px;
    font-size: 20px;
    font-weight: bolder;
    border-radius: 10px;
    color: white;
    background-color: #149777;
    border-bottom: 5px solid #ffc800;
}

.i-field{
    margin-bottom: 30px;

}

.i-field > * {
    font-size: 20px;
    display: block;

}

.i-field > input{
    width: 99%;
    height: 45px;
    border:1px solid blue;
    border-radius: 10px;
    background-color: #e8e3e3;
    padding: 0 5px;
}

.i-field > span{
    font-size: small;
    color: red;
    display: none;
}

button{
    color: white;
    font-size: large;
    font-weight: bold;
    cursor: pointer;
    margin-top: 10px;
    width: 100%;
    height: 80px;
    border-radius: 15px;
    border-bottom: 8px solid #ABA5A5;
    background-image: linear-gradient(175deg, #35B11D 0%, #0A6A04 100%);
}