/* header */
header {
    position: fixed;
    left: 0;top: 0;
    width: 100%;
    height: 5.5rem;
    z-index: 100;
    padding: 2rem;
    display: flex;
    align-items: center;
    background-color: #fff;
}
header .share {
    width:2.5rem;
    height:2.5rem;
    display: none;
    background: url('../img/share.png') no-repeat center/contain;
}
header .logo {display: none;height: 2.5rem;}
header .prev {width: 1rem;height: 3rem;background: url('../img/arrow.png') no-repeat center / 1rem;    filter: brightness(0);}
header .dummy {width: 3rem;height: 3rem;}
header h1 {margin-left: 2rem;font-size: 1.8rem;font-weight: 600;}

header.home {justify-content: right;background-color: transparent;z-index: 0;}
header.home .share {display: block;}
header.home .prev {display: none;}
header.home .dummy {display: none;}
header.home h1 {display: none;}