body {
    background: #fafafa;
}
header {
    width: 100%;
    position: fixed;
    left: 0;top: 0;
    z-index: 100;
    box-shadow: 0 4px 6px -4px #ddd;
}
header .header_img {
    padding: 1.5rem;
    display: flex;
    justify-content: center;
    background: #fafafa;
}
header .header_img img {width: 14rem;}
header .tab_wrap {
    background-color: #fff;
    display: flex;
}
header .tab_wrap .tab {
    width: 100%;
    height: calc(100% - 1.5rem);
    color: #808080;
    font-size: 1.8rem;
    font-weight: 600;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 0;
}
header .tab_wrap .tab.selected {
    font-weight: 900;
    color: #126492;
    border-bottom: 2px solid #126492;
}