:root{
    --primary-color:rgb(207, 230, 77);
    --secondary-color:rgb(27, 90, 66);
}
body{
    background-color: var(--primary-color);
    color: var(--secondary-color);
    margin: 0;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

.header{
    text-align: center;
    padding: 1.2rem;
    background-image: linear-gradient( var(--secondary-color),var(--primary-color));
    color:white;
    margin-bottom: 1rem;
}
.headspan{
    display: block;
    font-size: larger;
}
.L{
    color:red;
}
.u{
    color: yellow;
}
.c{
    color: aqua;
}
.k{
    color: blue;
}
.y{
    color:brown;
}
.ex{
    color: rgb(173, 0, 253);
}
.container{
    display: flex;
    flex-direction: column;
    max-width: 400px;
    margin: auto;
}
label{
    font-weight: bold;
    margin-bottom: 0.3rem;
}
input{
    border-radius: 0.2rem;
    margin-bottom: 1.2rem;
    width: 100%;
    padding: 0.3rem;
    color: var(--secondary-color);
}
.btnDiv{
    text-align: center;
}
button{
    width: 40%;
    padding: 0.5rem;
    border-radius: 0.3rem;
    background: transparent;
    border:2px solid var(--secondary-color);
    font-weight: bold;
}
button:hover{
    background-color: var(--secondary-color);
    color: var(--primary-color);
    transition: 0.5s;
}
@media only screen and (max-width:640px){
    .container{
        width: 80%;
    }
}
#output-Box{
    font-weight: bold;
    text-align: center;
    margin-top: 1rem;
}
footer{
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-image: linear-gradient( var(--primary-color),var(--secondary-color));
    padding-top: 1rem;
    text-align: center;
    color: white;
    clear: both;
    height: 100px;
}
.footer-header{
    font-weight: bolder;
    font-size: larger;
}
ul{
    list-style: none;
    padding: 0.4rem;
}
li{
    display: inline-block;  
    margin: 0.5rem;
}
a{
    color: white;
}
a:hover{
    color:aqua
}