* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    width: 100%;
    font-family: 'Noto Sans JP', sans-serif;
}

a {
    text-decoration: none;
}

:root {
    --text1: #000;
    --text2: #000b;
    --text3: #0007;
    --text5: #fffb;
    --text6: #fff;
    --back1: #fff;
    --back2: #ccc;
    --back3: #888;
    --back5: #444;
    --back6: #000;
    --url: #6f6fff;
    --urlhover: #9c9cff;
    --line: #aaa;
    --btnback1: #333;
    --btnback1hover: #000;
    --btntext1: #fff;
    --btnback6: #ccc;
    --btnback6hover: #fff;
    --btntext6: #111;
    --url: #6a6cff;
    --urlhover: #8880ff;
    --yellow1: #ffe365;
    --yellow2: #ffff00;
    --yellow3: #ffe36577;
}

a {
    color: var(--url);
}

a:hover {
    color: var(--urlhover);
}

header {
    width: 100%;
    background: var(--yellow1);
    filter: drop-shadow(0 0 10px #0004);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
}

header .area {
    width: min(100% - 30px,970px);
    padding: 10px 15px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .right {
    line-height: 1.1;
    display: block;
    color: var(--text1);
}

header h2 {
    font-weight: 900;
}

header .right p {
    font-size: 12px;
}

header .left a {
    padding: 6px 15px;
    margin: 0 -8px;
    font-size: 14px;
    color: var(--text3);
    white-space: nowrap;
    border-radius: 99px;
    transition: 1s;
}

header .left a:hover {
    background: var(--yellow2);
    color: var(--text1);
    transition: .2s;
}


header input,
.headermenu,
header label {
    display: none;
}

@media screen and (max-width: 600px) {
    header .left {
        display: none;
    }

    header label {
        display: block;
    }
}

#headermenu:checked+label+.headermenu {
    display: block;
}

html:has(#headermenu:checked) {
    overflow: hidden;
}

.headeropen {
    width: 36px;
    height: 36px;
    transition: 1s;
    position: relative;
    border-radius: 99px;
    cursor: pointer;
}

.headeropen:hover {
    background: var(--text5);
    transition: .2s;
}

.headeropen span {
    width: 20px;
    height: 2px;
    background: var(--text1);
    position: absolute;
    left: 8px;
}

.headeropen span:nth-child(1) {
    top: 11px;
}

.headeropen span:nth-child(2) {
    top: 17px;
}

.headeropen span:nth-child(3) {
    top: 23px;
}

.headermenu {
    width: 100%;
    height: 100vh;
    margin: 0 auto;
    position: fixed;
    top: 0;
    left: 0;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.headermenu .in {
    width: min(100% - 60px,940px);
    padding: 20px 20px 15px;
    margin: 15px auto;
    background: var(--yellow1);
    border-radius: 15px;
    transform: scale(1);
    position: relative;
    filter: drop-shadow(0 0 10px #0004);
    z-index: 999;
    animation: headeranime .2s;
}

.headermenu .menutop {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin: 0 0 15px;
    animation: menutopanime .2s;
}

.headermenu .menutop label {
    line-height: 16px;
    width: 16px;
    height: 16px;
    font-size: 16px;
    font-weight: 900;
    padding: 5px;
    border-radius: 50%;
    cursor: pointer;
    transition: 1s;
}

.headermenu .menutop label:hover {
    background: var(--text5);
    transition: .2s;
}

.headermenu ul {
    list-style: none;
}

.headermenu ul a {
    line-height: 1.7;
    font-size: 18px;
    font-weight: 700;
    color: var(--text3);
    white-space: nowrap;
    border-radius: 99px;
    transition: 1s;
}

.headermenu ul a:hover {
    color: var(--text1);
    transition: .2s;
}

.headerbackclose {
    width: 100%;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 900;
    cursor: pointer;
}

@media screen and (min-width: 600px) {
    .headermenu,
    .headermenu .in {
        display: none;
    }

    html:has(#headermenu:checked) {
        overflow: auto;
    }
}

@keyframes headeranime {
    0% {
        transform: translateY(-5px);
        padding: 0px 20px 0;
    }
    100% {
        transform: translateY(0);
        padding: 20px 20px 15px;
    }
}

@keyframes menutopanime {
    0% {
        margin: 0 0 0;
    }
    100% {
        margin: 0 0 15px;
    }
}

footer {
    width: 100%;
    background: var(--yellow1);
}

footer .area {
    width: min(100% - 30px,970px);
    margin: 0 auto;
    padding: 30px 15px 60px;
}

footer .first {
    display: flex;
    justify-content: space-between;
}

footer .join {
    background: var(--btnback1);
    color: var(--btntext1);
    padding: 6px 18px;
    height: max-content;
    font-size: 14px;
    font-weight: 700;
    border-radius: 99px;
    transition: 1s;
}

footer .join:hover {
    background: var(--btnback1hover);
    transition: .2s;
}

footer .name {
    display: block;
    color: var(--text1);
    line-height: 1.1;
    margin: 0 0 20px;
}

footer .name h2 {
    font-weight: 900;
}

footer .name p {
    font-size: 12px;
}

footer .links {
    display: flex;
}

footer .links div {
    width: min(50%,200px);
}

footer .links ul {
    list-style: none;
}

footer .links a {
    color: var(--text3);
    transition: 1s;
}

footer .links a:hover {
    color: var(--text1);
    transition: .2s;
}