body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    padding-bottom: 300px;
    max-width: 100vw;    /* ビューポートの幅に最大幅を制限 */
    overflow-x: hidden;
}

.nav-bar {
    position: fixed;
    
    display: flex;
    justify-content: space-evenly;
    align-items: center;

    width: 100%;
    background-color: #eeeeee;
    bottom: 22%;

    padding: 1em 0;

    border-top: 2px solid;
    border-bottom: 2px solid;
    border-color: #030a04;
    z-index: 10;

    font-size: 1vw;
}

.nav-bar img{
    display: block;
    margin: auto;

    position: fixed;
    
    height: auto;
    width: 7%;

    z-index: 11;
    transform: translateY(-100px);

}

.nav-content {
    position: fixed;
    
    display: flex;
    justify-content: space-evenly;

    width: 100%;
    background-color: #ffffff;
    height: 25%;
    bottom: 0;

    z-index: 9;
}

.nav-bar a{
    float: flex;
    color: #030a04;
    opacity: 1;
    transition: opacity 0.3s ease;
}

#linkA:hover {
    opacity: 0.5;
}

#linkB:hover {
    opacity: 0.5;
}

#linkC:hover {
    opacity: 0.5;
}

#linkD:hover {
    opacity: 0.5;
}

#linkE:hover {
    opacity: 0.5;
}

@media screen and (max-width: 480px) {
	body, html {
        margin: 0;
        padding: 0;
        width: 100%;
        height: 100%;
        padding-bottom: 300px;
    }
    
    .nav-bar {
        display: none;
    }
    
    .nav-content {
        display: none;
    }
}