html {
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background-color: #DEF0E2;
    font-size: 3.47vw;
    overflow: auto;
}

body {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: 'Poppins', 'M PLUS 1p', sans-serif;
    font-size: 3.47vw;
    font-weight: 500;
    color: #081D18;
}

#sideline {
    position: fixed;
    top: 0;
    left: 0;
    width: 8.5vw;
    min-height: 100vh;
    min-height: -webkit-fill-available;
    background: linear-gradient(180deg, rgba(87, 216, 150, 0.23) 0%, rgba(153, 240, 108, 0.23) 51.56%, rgba(173, 247, 97, 0.23) 100%);
    box-shadow: 6px 0px 24px rgba(0, 0, 0, 0.06);
    z-index: -1;
}

.set-width {
    width: 87.2%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    position: relative;
    display: flex;
    flex-direction: column;
    /*justify-content: space-between;
    align-items: center;*/
    width: 91.5%;
    height: 16vw;
    /*
    background: white;
    border-radius: 8vw;
    */
    margin-top: 3.2vw;
    font-size: 1.23em;
    /*box-shadow: 0 0 8vw rgba(0, 0, 0, .2);*/
    z-index: 1;
}

.header-menu {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(250, 250, 250, .7);
    backdrop-filter: blur(.5vw);
    -webkit-backdrop-filter: blur(.5vw);
    border-radius: 8vw;
    box-shadow: 0 0 8vw rgba(0, 0, 0, .2);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header-menu.open {
    animation-name: headerMenuOpen;
    animation-duration: .5s;
    animation-fill-mode: forwards;
}

.header-menu.close {
    animation-name: headerMenuClose;
    animation-duration: .5s;
    animation-fill-mode: forwards;
}

@keyframes headerMenuOpen {
    from {
        height: 100%;
    }
    to {
        height: 700%;
    }
}

@keyframes headerMenuClose {
    from {
        height: 700%;
    }
    to {
        height: 100%;
    }
}

.header-menu-items {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 16vw;
    flex: 0 0;
}

.header-menu-items.no-hamburger {
    justify-content: flex-end;
}

.header-menu-items.only-title {
    margin: 0;
    justify-content: center;
}

/* ヘッダ：ハンバーガーメニュー */
header .hamburger {
    position: relative;
    margin: 0;
    height: 5.3vw;
    flex-basis: 16%;
}

header .hamburger-bar {
    position: absolute;
    display: block;
    width: 7.5vw;
    height: .5vw;
    left: 4.3vw;
    background: #081D18;
    opacity: 1;
}

header .hamburger-bar.open {
    animation-name: fadeOut;
    animation-duration: .5s;
    animation-fill-mode: forwards;
}

header .hamburger-bar.close {
    animation-name: fadeIn;
    animation-duration: .5s;
    animation-fill-mode: forwards;
}

header .batsu {
    display: block;
    position: relative;
    width: 7.47vw;
    height: 7.47vw;
    opacity: 0;
}

header .batsu::before, .batsu::after {
    content: "";
    position: absolute;
    top: 30%;
    left: 100%;
    width: .53vw;
    height: 7.47vw;
    background: #081D18;
}

header .batsu::before {
    transform: translate(-50%,-50%) rotate(45deg);
}
   
header .batsu::after {
    transform: translate(-50%,-50%) rotate(-45deg);
}

header .batsu.open {
    animation-name: fadeIn;
    animation-duration: .5s;
    animation-fill-mode: forwards;
}

header .batsu.close {
    animation-name: fadeOut;
    animation-duration: .5s;
    animation-fill-mode: forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

header .hamburger-bar:nth-child(1) {
    top: 0;
}

header .hamburger-bar:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

header .hamburger-bar:nth-child(3) {
    top: 100%;
    transform: translateY(-100%);
}

/* ヘッダ：タイトル */
header .header-title {
    flex-basis: 68%;
    position: relative;
    text-align: center;
    height: 16vw;
    line-height: 16vw;
}

/* ヘッダ：アイコン */
header .header-img {
    flex-basis: 16%;
    position: relative;
    width: 14.4vw;
    height: 14.4vw;
}

header .header-img img {
    position: absolute;
    right: .8vw;
    width: 14.4vw;
    height: 14.4vw;
}

/* ヘッダボディ */
.header-menu-body {
    width: 75.7vw;
    height: 82.9vw;
    margin-top: 2.4vw;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    column-gap: 9.3vw;
    row-gap: 4.8vw;
    flex: 0 0;
    opacity: 0;
}

.header-menu-body.open {
    transition: .5s;
    animation-name: fadeInFromTop;
    animation-duration: .7s;
    animation-fill-mode: forwards;
    visibility: visible;
}

.header-menu-body.close {
    transition: .5s;
    animation-name: fadeOutToTop;
    animation-duration: .5s;
    animation-fill-mode: forwards;
    visibility: hidden;
}

.header-menu-body-items {
    width: 43.7%;
    height: 47.6%;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 0;
}

.header-menu-body-items img {
    width: 33.1vw;
    height: 33.1vw;
    margin-bottom: .8vw;
}

@keyframes fadeInFromTop {
    from {
        opacity: 0;
        transform: translateY(-5.3vw);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOutToTop {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-5.3vw);
    }
}

/* ローディングなど全画面カバー */
.cover {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(8, 29, 24, .8);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}

/* reset css */
button {
    border-color: transparent;
    background: transparent;
}

p {
    margin: 0;
}

/* poor design */
.poor {
    font-family: sans-serif;
    font-weight: bold;
}