Active class now work corretly in HTML - html

Question

I have a problem in my html. I can't find how can i solve it.
[class="active" then Home mark with red underline. default][1]
[When i click, red underline disappered][2]
[When i click anywhere, it is come again][3]
/*input[type=text] {
width: 40px;
box-sizing: border-box;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
background-color: white;
background-image: url('glyphicons-28-search.png');
background-position: 10px 10px;
background-repeat: no-repeat;
padding: 12px 20px 12px 25px;
-webkit-transition: width 0.4s ease-in-out;
transition: width 0.4s ease-in-out;
margin-left: 10px;
}*/
input[type=text] {
width: 130px;
box-sizing: border-box;
border: 2px solid #ccc;
border-radius: 4px;
font-size: 16px;
background-color: white;
background-image: url('glyphicons-28-search.png');
background-position: 10px 10px;
background-repeat: no-repeat;
padding: 12px 10px 10px 40px;
-webkit-transition: width 0.4s ease-in-out;
transition: width 0.4s ease-in-out;
margin-left: 10px;
margin-bottom: 0px;
}
input[type=text]:focus {
/*border: 2px solid #FF0000;*/
}
body {
font: 400 15px Lato, sans-serif;
line-height: 1.8;
color: #818181;
background-color: #d9d9d9;
}
h2 {
font-size: 24px;
text-transform: uppercase;
color: #303030;
font-weight: 600;
margin-bottom: 30px;
}
h4 {
font-size: 19px;
line-height: 1.375em;
color: #303030;
font-weight: 400;
margin-bottom: 30px;
}
.container{
width: 100%;
margin: auto;
}
.navbar {
margin-bottom: 0;
border: 0;
font-size: 15px !important;
line-height: 1.42857143 !important;
letter-spacing: 1px;
border-radius: 0;
background-color: white;
padding: 30px 30px 30px 30px;
}
.navbar .navbar-nav {
display: inline-block;
float: none;
border-color: white;
}
.navbar-nav li a:hover, .navbar-nav li.active a{
border-bottom: 2px solid red;
color: black !important;
background-color: white !important;
}
.navbar .navbar-collapse {
text-align: center;
}
.center {
width: 100%;
margin: 10px 50px 0px 50px;
}
.right {
float: right;
margin-right: 130px;
margin-left: 260px;
}
.top {
margin-top: 150px;
}
.img {
padding-right: 50px;
width: 80%;
}
Thanks for helping!

Answer 1

Just add this CSS :
.navbar-nav li.active a:focus{
border-bottom: 2px solid red;
}
if this not works then just add important :
.navbar-nav li.active a:focus{
border-bottom: 2px solid red !important;
}