header {
    position: fixed;
    top: 1px;
    left: 0;

    width: 100%;
    height: 130px;
    background-color: white
}
nav {
    height: 100%;
    margin: 0 auto;
    display: flex;
}

.nav_group {
    width: calc(100%/4);
    height: 100%;
    position: relative;
}

.nav_item {
    position: absolute;
    width: 100%;
    text-align: center;
}

.nav_item.menu {
    height: 22.5%;
    display: flex;
    align-items:center;
    justify-content: center;
}

.nav_item.menu a {
    
    text-decoration: none;
    font-size: 18px;
    color: rgb(255, 253, 253);
}

@media (max-width: 768px) {
    .nav_item.menu a  {
        font-size: 16px;
    }
} 
.nav_item.menu a:hover {
    color: var(--orange_color);
}


.nav_item.icon {
    height: 22.5%;
    top: 22.5%;
    display: flex;
    align-items:center;
    justify-content: center;

}

.nav_item.icon img {
    height: 80%;
}

.nav_item.knob {

    top: calc(45% + 5%);
    height: 45%;
}

.nav_item.knob img {
    height: 100%;
    aspect-ratio: 1/1;
}

.nav_item.knob.pot img {
    transition: transform 800ms;
}

.nav_item.knob.pot img:hover {
    transform: rotate(300deg);
}

.nav_item.knob.input img {
    transition: transform 800ms;
}

.nav_item.knob.input img:hover {
    transform: scale(1.1);
}

.nav_item.knob.light img {
    transition: all 500ms;
    opacity: 0;
}

.nav_item.knob.light a img:hover {
    opacity: 1;
}

@media (min-width: 700px) {
    nav {
        width: 700px;
    }
}

@media (max-width: 700px) {
    nav {
        width: 100%;
    }
}

.nav_backdrop {
    height: 100%;
    width: 100%;
    position: absolute;
    z-index: -1;

}

.black_top {
    width: 100%;
    height: 22.5%;
    left: 0;
    right: 0;
    background-color: rgb(0, 0, 0);
}


.orange {
    width: 100%;
    height: 22.5%;

   background-color: var(--orange_color);
}

.control_plate {
    height: 50%;
    width: 100%;
    left: 0;
    background-color: rgb(255, 255, 255);
}

.black_border {
    height: 2.5%;
    background-color: black;
}

@media (max-height: 350px) {
    header {
        height: 20vh;
    }
    .container
    {
        top: 20vh;
    }
    .nav_item.menu a
    {
        font-size:4vh;
    }
}