index.css

/*
* Template Name : 
* Template Author : 
* Date Designed :
* Github Repo Link :
*/
*,html {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}
:root{
    --primary:blue;
    --secondary:gray;
    --login:green;
    --danger:red;
}

.r-app {
    overflow: hidden;
}

.w-full{
    width: 100%;
}
.w-400{
    width: 400px;
}

.h-full{
    height: 100%;
}
.h-100v{
    height: 100vh;
}

.form-inline{
    display: flex;
    flex-direction: row;
    align-items: center;
}
.form-inline .form-group {
    margin:2px 0;
}
.form-group{
    display: block;
    margin: 10px 0;
}
.form-control{
    width: 100%;
    padding: 10px;
    outline: 1px solid black;
    border: none;
    border-radius: 5px;
}
.form-control:focus{
    outline: 1px solid green;
    border: none;
}
.form-group .bt-1{
    border: none;
    outline: none;
    border-bottom: 1px solid black;
    transition: .3s linear;
}
.form-group .bt-1:focus{
    outline:none ;
    border-bottom: 1px solid green;
}
.form-group .error {
    border: none;
    outline: 1px solid var(--danger);
    transition: .3s linear;
}

.mx-auto{
    margin: 0 auto;
}
.my-2{
    margin:15px 0;
}

.px-2 {
    padding: 0 10px;
}
.py-2{
    padding: 10px 0;
}
.p-2{
    padding: 10px;
}

.text-center{
    text-align: center;
}

.v-scroll{
    overflow-y: auto;
}
.h-scroll{
    overflow-x: auto;
}

.hr-row{
    display: flex;
    flex-direction: row;
    align-items: center;
}
.row{
    display: flex;
    flex-direction: row;
}
.d-col{
    display: flex;
    flex-direction: column;
}
.centered{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.justify-between{
    justify-content: space-between;
}
.justify-around{
    justify-content: space-around;
}
.justify-even{
    justify-content: space-evenly;
}
.justify-center{
    justify-content: center;
}
.flex-1{
    flex: 1;
}

.bg-primary{
    background-color: var(--primary);
}
.bg-gray-400{
    background-color: #eee;
}
.bg-gray{
    background-color: var(--secondary);
}
.bg-dark {
    background: linear-gradient(rgba(0,0,0),rgba(0,0,0));
}

.btn {
    border: none;
    outline: none;
    width: max-content;
    border-radius: 5px;
    cursor: pointer;
}
.btn-login{
    background-color: var(--login);
    padding: 10px 15px;
}

@media screen and (max-width: 500px) {
    .body{
        position: absolute;
        top: 0;
        left: 0;
    }
    .w-400{
        width: 100%;
    }

    .text-white {
        color: #fff;
    }
}