gradient color to input field - html

Question

just a relative simple question I think but can't find what to change. I you click to this input field you get a gradient color on the bottom of the field. I need to add something to get a red gradient color to the bottom when the page is loaded (so not clicked), when there is clicked the gradient changes to that yellow to pink gradient. thanks in advance!
* {
margin: 0px;
padding: 0px;
box-sizing: border-box;
}
body, html {
height: 100%;
font-family: Poppins-Regular, sans-serif;
}
/*---------------------------------------------*/
a {
font-family: Poppins-Regular;
font-size: 14px;
line-height: 1.7;
color: #666666;
margin: 0px;
transition: all 0.4s;
-webkit-transition: all 0.4s;
-o-transition: all 0.4s;
-moz-transition: all 0.4s;
}
a:focus {
outline: none !important;
}
a:hover {
text-decoration: none;
color: #6a7dfe;
color: -webkit-linear-gradient(left, #21d4fd, #b721ff);
color: -o-linear-gradient(left, #21d4fd, #b721ff);
color: -moz-linear-gradient(left, #21d4fd, #b721ff);
color: linear-gradient(left, #21d4fd, #b721ff);
}
/*---------------------------------------------*/
h1,h2,h3,h4,h5,h6 {
margin: 0px;
}
p {
font-family: Poppins-Regular;
font-size: 14px;
line-height: 1.7;
color: #666666;
margin: 0px;
}
ul, li {
margin: 0px;
list-style-type: none;
}
/*---------------------------------------------*/
input {
outline: none;
border: none;
}
textarea {
outline: none;
border: none;
}
textarea:focus, input:focus {
border-color: transparent !important;
}
/*------------------------------------------------------------------
[ Input ]*/
.wrap-input100 {
width: 100%;
position: relative;
border-bottom: 2px solid #adadad;
margin-bottom: 37px;
}
.input100 {
font-family: Poppins-Regular;
font-size: 15px;
color: #555555;
line-height: 1.2;
display: block;
width: 100%;
height: 45px;
background: transparent;
padding: 0 5px;
}
/*---------------------------------------------*/
.focus-input100 {
position: absolute;
display: block;
width: 100%;
height: 100%;
top: 0;
left: 0;
pointer-events: none;
}
.focus-input100::before {
content: "";
display: block;
position: absolute;
bottom: -2px;
left: 0;
width: 0;
height: 2px;
-webkit-transition: all 0.4s;
-o-transition: all 0.4s;
-moz-transition: all 0.4s;
transition: all 0.4s;
background: #6a7dfe;
background: -webkit-linear-gradient(left, yellow, #b721ff);
background: -o-linear-gradient(left, yellow, #b721ff);
background: -moz-linear-gradient(left, yellow, #b721ff);
background: linear-gradient(left, yellow, #b721ff);
}
.focus-input100::after {
font-family: Poppins-Regular;
font-size: 15px;
color: #999999;
line-height: 1.2;
content: attr(data-placeholder);
display: block;
width: 100%;
position: absolute;
top: 16px;
left: 0px;
padding-left: 5px;
-webkit-transition: all 0.4s;
-o-transition: all 0.4s;
-moz-transition: all 0.4s;
transition: all 0.4s;
}
.input100:focus + .focus-input100::after {
top: -15px;
}
.input100:focus + .focus-input100::before {
width: 100%;
}
.has-val.input100 + .focus-input100::after {
top: -15px;
}
.has-val.input100 + .focus-input100::before {
width: 100%;
}
/*------------------------------------------------------------------
[ Responsive ]*/
#media (max-width: 576px) {
.wrap-login100 {
padding: 77px 15px 33px 15px;
}
}
/*------------------------------------------------------------------
[ Alert validate ]*/
.validate-input {
position: relative;
}
.alert-validate::before {
content: attr(data-validate);
position: absolute;
max-width: 70%;
background-color: #fff;
border: 1px solid #c80000;
border-radius: 2px;
padding: 4px 25px 4px 10px;
top: 50%;
-webkit-transform: translateY(-50%);
-moz-transform: translateY(-50%);
-ms-transform: translateY(-50%);
-o-transform: translateY(-50%);
transform: translateY(-50%);
right: 0px;
pointer-events: none;
font-family: Poppins-Regular;
color: #c80000;
font-size: 13px;
line-height: 1.4;
text-align: left;
visibility: hidden;
opacity: 0;
-webkit-transition: opacity 0.4s;
-o-transition: opacity 0.4s;
-moz-transition: opacity 0.4s;
transition: opacity 0.4s;
}
.alert-validate::after {
content: "\f06a";
font-family: FontAwesome;
font-size: 16px;
color: #c80000;
display: block;
position: absolute;
background-color: #fff;
top: 50%;
-webkit-transform: translateY(-50%);
-moz-transform: translateY(-50%);
-ms-transform: translateY(-50%);
-o-transform: translateY(-50%);
transform: translateY(-50%);
right: 5px;
}
.alert-validate:hover:before {
visibility: visible;
opacity: 1;
}
.limiter {
width: 20%;
padding-top: 5%;
}
<div class="limiter">
<div class="wrap-input100 validate-input">
<span class="btn-show-pass">
<i class="zmdi zmdi-eye"></i>
</span>
<input class="input100" type="password" name="password">
<span class="focus-input100" data-placeholder="wachtwoord"></span>
</div>
</div>

Answer 1

Add CSS border-image and border-image-slice properties to the .wrap-input100 class
.wrap-input100 {
width: 100%;
position: relative;
margin-bottom: 37px;
border-bottom: 2px solid transparent;
border-image: linear-gradient(to right, #b721ff 0%, red 100%);
border-image-slice: 1;
}