:root{
    --blue-clr: #1523ff;
    --red-clr: #ff2a15;
    --gld-clr: #eac13b;
    --txt-clr: #ffffff;
    --txt-clr-: #ffffff;
    --bg-clr-: #212121;
    --bg-clr: #212121;
}



@media (max-width: 821px){
    .nav{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.nav li{
    list-style: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    transition: 0.5s;
}


.nav a{
    text-decoration: none;
    color: var(--txt-clr-);
    padding: 10px 10px;
    padding-bottom: 6px;
    position: relative;
    margin: 15px 0px;
    font-size: 25px;
    transition: 0.5s;
}

.navbar a:hover{
    color: var(--txt-clr-);
    
}
.nav a:after{
    content: "";
    position: absolute;
    background: var(--blue-clr);
    box-shadow: 0px 0px 10px var(--blue-clr);
    height: 4px;
    width: 0;
    left: 50%;
    bottom: -1px;
    transition: 0.5s;
    z-index: -1;
}
.nav a:hover:after{
    width: 100%;
    left: 0;
}    
    
.off-screen-menu {
    background-color: rgba(0, 0, 0, 0.47);
    backdrop-filter: blur(10px);
    height: 100%;
    width: 35%;
    position: fixed;
    top: 0;
    right: -10000px;
    display: flex;
    flex-direction: column;
    padding-top: 170px;
    text-align: right;
    font-size: 3rem;
    transition: .3s ease;
    z-index: 1000;
    overflow-y: auto;
    overflow-x: hidden;
}
.off-screen-menu.active {
    right: 0;
   
}

/* ham menu */
.ham-menu {
    height: 45px;
    width: 35px;
    margin-left: auto;
    position: relative;
    z-index: 1000;
    margin-right: 0px;
    cursor: pointer;
}
.ham-menu span {
    height: 1.5px;
    width: 100%;
    background-color: var(--blue-clr);
    border-radius: 25px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    transition: .3s ease;
}
.ham-menu span:nth-child(1) {
    top: 30%;
}
.ham-menu span:nth-child(3) {
    top: 70%;
}
.ham-menu.active span {
    background-color: var(--txt-clr-);
}
.ham-menu.active span:nth-child(1) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
}
.ham-menu.active span:nth-child(2) {
    opacity: 0;
}
.ham-menu.active span:nth-child(3) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
}


.mode-switch{
    width: 70px;
    height: 70px;
    background: var(--txt-clr);
    margin: 20px 10px;
    border: 10px solid var(--txt-clr);
    border-radius: 50%;
    padding: 8px 8px;
    margin-top: 45px;
    cursor: pointer;
    transition: .75s;
}

@media(max-width: 638px){
    .nav a{
        font-size: 22px;
    }
    
    .mode-switch{
        width: 50px;
        height: 50px;
        padding: 1px 1px;
    }
}

}
@media(max-width: 438px){
    .ham-menu{
        width: 20px;
        height: 25px;
    }
    
    .ham-menu span{
        height: 1px;
        width: 100%;
    }
    
    .off-screen-menu{
        width: 45%;
        padding-top: 110px;
    }
    
    .nav a{
        font-size: 20px;
        margin: 10px 0px;
    }
    
    .mode-switch{
        width: 50px;
        height: 50px;
        padding: 2px 2px;
    }
    
    
}