input.css

* {
    box-sizing: border-box;
 }
 body {
    background: #f16a97;
 }
 .decor {
    position: relative;
    max-width: 400px;
    margin: 50px auto 0;
    background: rgb(240, 187, 118);
    border-radius: 30px;
 }
 .form_inner {
    padding: 50px;
 }
 .form_inner input {
    display: block;
    width: 100%;
    padding: 0 20px;
    margin-bottom: 10px;
    background: #E9EFF6;
    line-height: 40px;
    border-width: 0;
    border-radius: 20px;
    font-family: 'Roboto', sans-serif;
 }
 .form_inner input[type="submit"] {
    margin-top: 30px;
    background: #f69a73;
    border-bottom: 4px solid #d87d56;
    color: white;
    font-size: 14px;
 }
 .form_inner h3 {
    margin-top: 0;
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    font-size: 24px;
    color: #707981;
 }
 .form_inner select {
    display: block;
    margin-bottom: 10px;
    padding: 0 20px;
    background: #b6f1bb;
    line-height: 40px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 24px;
 }
 .form_inner select option{
    display: list-item;
    enable-background: initial;
    background-color: #e5f1a1;
    line-height:30px;
 }
 .form_inner input[type="checkbox"] {
    display: flex;
    background: #d87d56;
 }
 .form_inner input[type="radio"] {
    display: block;
    background: #d87d56;
    padding: 0 20px;
 }
 /*Input type radio*/
 .group_radio {
	display: inline-block;
	overflow: hidden;
}
.inp_radio {
	float: left;
	display: inline-block;
}
.inp_radio input[type=radio] {
	display: none;
}
.inp_radio label {
	display: inline-block;
	padding: 0px 15px;   
	line-height: 34px;    
	border: 1px solid #999;
	border-right: none;
	cursor: pointer;
	user-select: none;   
}
.group_radio .inp_radio_1 label {
	border-radius: 6px 0 0 6px;
}
.group_radio .inp_radio_2 label {
	border-radius: 0 6px 6px 0;
	border-right: 1px solid #999;
}
.group_radio  input[type=radio]:checked + label {
	background: #83f8b0;
}
.group_radio  input[type=radio]:checked + label {
	background: #83f8b0;
}
input:invalid {
   border: 1px dashed;
 }
 
 input:valid {
   border: 2px solid;
 }