.header {
    display: flex;
    align-items: center;
    height: 75px;
    background-color: black;
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.left-section {
    display: flex;
    width: 125px; 
}

.fukum-logo {
    margin-left: 25px;
    height: 40px;
    cursor: pointer;
}

.middle-section {
    display: flex;
    text-align: center;
    align-items: center;
    flex: 1;
    justify-content: center;
}

.right-section {
    display: flex;
    width: 125px;
    align-items: center;
}

.x-header-logo {
    margin-left: 80px;
    height: 25px;
    cursor: pointer;
}

a.link {
    font-family: "Roboto", arial;
    font-size: 20px;
    margin-left: 15px;
    margin-right: 15px;
    color: white;
    text-decoration: none;
    transition: color 0.15s;
}

a.link:hover {
    color: rgb(165, 165, 165);
    cursor: pointer;
}

.burger-menu,
.burger-menu-button {
    display: none;
}

.burger-menu-button {
    height: 40px;
    width: 40px;
    background-color: black;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}

.burger-menu-button.open {
    background-image: url(/icons/close-button.png);
}

.burger-menu {
    position: fixed;
    width: 100%;
    height: 100vh;
    z-index: 90;
    background-color: black;
}

.burger-menu.open {
    display: block;
}

.burger-menu ul {
    width: 100%;
    height: calc(100vh - 75px);
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    margin: 0;
    padding: 0;
    list-style: none;
}

.burger-menu ul li {
    flex-basis: 100%;
    border-top: 2px solid rgb(165, 165, 165);
}

.burger-menu ul li:last-child {
    border-bottom: 2px solid rgb(165, 165, 165);
}

.burger-menu ul li a {
    display: block;
    height: 100%;
    font-size: 2rem;
    padding: 30px 0;
    flex-basis: 100%;
    text-align: center;
    color: white;
    text-decoration: none;
}

@media only screen and (max-width: 1000px) {
    a.link {
        display: none;
    }

    .burger-menu-button {
        display: block;
        background-image: url(/icons/burger-menu.png);
    }
}