* {
    margin: 0;
}

::selection {
    background-color: #000;
    color: #FFF;
}

body {
    font-family: sans-serif;
    font-size: 16px;
}

.big {
    font-size: 3em;
}

.middle {
    font-size: 1.7em;
}

.bold,
.GnavBlock {
    font-weight: 700;
}

.medium {
    font-weight: 600;
}

.Inter {
    font-family: "Inter", sans-serif;
}

.NotoSans {
    font-family: "Noto Sans JP", sans-serif;
}

.Heisei {
    font-family: "heisei-mincho-std", sans-serif;
}

a {
    text-decoration: none;
    color: black;
}

#LeftMenu {
    width: 180px;
    padding-left: 30px;
    padding-top: 30px;
    position: fixed;
}

#TextLogo {
    padding-bottom: 30px;
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    display: flex;
    align-items: center;
}

ul li a {
    padding-left: 24px;
    background: url(circle.png) left center no-repeat;
    background-size: 3px auto;
}

.GnavBlock {
    font-size: 14px;
    margin-bottom: 30px;
}

.GnavBlock::before {
    display: block;
    position: relative;
    top: 20px;
    left: 2px;
    height: 20px;
    width: 1px;
    background-color: #000;
    content: "";
}

#RightMenu {
    position: fixed;
    right: 0;
    padding-top: 30px;
    padding-right: 30px;
    transition: 0.5s;
    opacity: 1;
    pointer-events: auto;
}

#LogoAbout {
    width: 64px;
    padding-bottom: 48px;
}

.TwitterLogo {
    display: flex;
    justify-content: center;
    margin-bottom: 10px;
}

.TwitterLogo svg {
    width: 24px;
    fill: #000;
    transition: 0.2s;
}

.TwitterLogo svg:hover {
    fill: #009df7;
}

#BackToTop {
    position: fixed;
    cursor: pointer;
    width: 32px;
    right: 0;
    bottom: 0;
    margin-right: 30px;
    margin-bottom: 30px;
    padding: 0 16px;
    opacity: 0;
    transition: 0.5s;
    pointer-events: none;
}

#Arrow {
    width: 24px;
    padding: 0 4px;
    position: relative;
    transform: translateY(16px);
    animation: arrow 1s ease infinite;
}

@keyframes arrow {
    0% {
        transform: translateY(16px);
    }
    70% {
        transform: translateY(0px);
    }
    100% {
        transform: translateY(16px);
    }
}

#TopLogo {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#Logo {
    width: 400px;
}

#MainContents {
    display: flex;
    justify-content: center;
    width: 100%;
}

#MainBox {
    width: 850px;
}

.box {
    padding-left: 90px;
    padding-top: 48px;
    padding-bottom: 32px;
    display: flex;
}

.SubBox {
    position: relative;
    top: 16px;
    padding-left: 32px;
    line-height: 96px;
}

.MemberBtn {
    border: none;
    cursor: pointer;
    color: #000;
    background-color: #FFF0;
    padding-top: 10px;
    margin: 10px;
    transition: 0.3s;
}

.MemberBtn:hover {
    background-color: #000;
    color: #FFF;
}

.MemberGroupBox p {
    width: 128px;
    border-bottom: 2px solid #000;
}

#MemberIntroductionBox {
    position: fixed;
    top: 25%;
    left: 25%;
    border: 0;
    opacity: 0;
    pointer-events: none;
    background-color: #FFF;
    transition: 0.5s;
}

#IntroBox {
    width: 700px;
    padding: 30px;
}

#IntroTopBox {
    width: 100%;
    height: 128px;
    display: flex;
    align-items: center;
}

#MemberIcon {
    width: 128px;
    height: 128px;
    background-image:url(./assets/usericons/TIIDA.png);
    background-size: 128px 128px;
    border-radius: 50%;
}

#Names {
    margin-left: 32px;
}

#Names p {
    margin: 5px;
}

#MemName {
    height: 48px;
}

#MemberSNS {
    flex-grow: 1;
    right: 0;
}

#IntroBottomBox {
    margin-top: 16px;
}

#iCloseButton {
    position: absolute;
    cursor: pointer;
    color: #000;
    margin-bottom: 30px;
    bottom: 0;
    font-size: 1em;
    background-color: #FFF;
    border: 2px solid #000;
    transition: 0.3s;
}

#iCloseButton:hover {
    color: #FFF;
    background-color: #000;
}

#iframeBack {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-color: #0008;
    pointer-events: none;
    opacity: 0;
    transition: 0.5s;
}