@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@600&display=swap');

:root{
    --success-color:#2ecc71;
    --error-color: #e74c3c;
}

*{
    box-sizing: border-box;
}
body{
    background-color: #f9fafb;
    font-family:'Open Sans',sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
}
.container{
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0, 0.3);
    width: 400px;

}
h2{
    text-align: center;
    margin: 0 0 20px;
}
.form{

    padding: 30px 40px;

}
.form-control{

    margin-bottom: 10px;
    padding-bottom: 20px;
    position: relative;
}
.form-control label{

   color: #777;
   display: block;
   margin-bottom: 5px;
}
.form-control input{
    border: 2px solid  #f0f0f0;
    border-radius: 4px;
    width: 100%;
    padding: 10px;
    font-size: 14px;

}
.form-control input:focus{
    outline: 0;
    border-color: #777;
}
.form-control.success input{

    border-color:var(--success-color);

}
.form-control.error input{
    border-color:var(--error-color);
}

.form-control small{
    color: var(--error-color);
    position: absolute;
    bottom: 0;
    left: 0;
    visibility: hidden;
}

.form-control.error small{

    visibility: visible;
}

.form button{
    cursor: pointer;
    background-color: #3498db;
    border: 2px sold #3498db;
    border-radius: 4px;
    color: #fff;
    display: block;
    font-size: 16px;
    padding: 10px;
    margin-top: 10px;
    width: 100%;
}

body{
    background-image: linear-gradient(120deg,red,blue);
}