* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "LSeedJP", sans-serif;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
    max-width: 100%;
    color: #FFF;
    background: #4f1174;
    overflow: hidden;
}

@font-face {
    font-family: 'LSeedJP';
    src: url(https://xullua.com/font/LSeedJPTh.woff) format('woff');
    font-weight: 100;
    font-style: normal;
}

@font-face {
    font-family: 'LSeedJP';
    src: url(https://xullua.com/font/LSeedJPRg.woff) format('woff');
    font-weight: 500, normal;
    font-style: normal;
}

@font-face {
    font-family: 'LSeedJP';
    src: url(https://xullua.com/font/LSeedJPBd.woff) format('woff');
    font-weight: 700;
    font-style: normal;
}

.top {
    text-align: center;
    margin: 20px auto 0 auto;
}

h1 {
    line-height: 1;
}

.top img {
    width: 60px;
    border-radius: 50%;
}

.top h3 {
    font-size: 14px;
    font-weight: 400;
    color: #FFF9;
}

.topbtn {
    margin: 10px 0 0 0;
}

.topbtn a {
    color: #FFF;
    font-size: 12px;
    font-weight: bold;
    text-decoration: none;
    border: 1px solid #FFF;
    border-radius: 40px;
    padding: 2px 10px;
    transition: 1s;
}

.topbtn a:hover {
    background: #FFF;
    color: #501b81;
    transition: .2s;
}

.center {
    width: 100vw;
    height: 100vh;
    top: 0;
    position: fixed;
    display: flex;
    align-items: center;
    justify-self: center;
}

.content {
    margin: auto;
    width: 100%;
    max-width: 720px;
}

.btn {
    width: 100%;
    padding: 20px;
    margin: 0 0 80px 0;
    list-style: none;
}

.btn a {
    display: flex;
    width: 100%;
    height: 40px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.2);
    color: #FFF;
    margin: 7px 0;
    padding: 7px 10px;
    text-decoration: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-size: 15px;
    font-weight: bold;
    align-items: center;
    transition: 1s;
    position: relative;
}

.btn a:hover {
    background: rgba(255, 255, 255, 0.45);
    transform: scale(1.01);
    transition: .2s;
}

.btn a::after {
    content: "";
    position: absolute;
    top: 50%;
    bottom: 0;
    right: 25px;
    width: 6px;
    height: 6px;
    border-top: solid 2px #FFF;
    border-right: solid 2px #FFF;
    transform: translateY(-50%) rotate(45deg);
    transition: 1s;
}

.btn a:hover::after {
    right: 18px;
    transition: .2s;
}

.btn img {
    height: 20px;
    margin: 0 10px 0 5px;
    filter: invert(88%) sepia(61%) saturate(0%) hue-rotate(229deg) brightness(107%) contrast(101%);
}

.btn span {
    font-size: 14px;
}

/* コピーライト */
.end {
    display: block;
    position: fixed;
    bottom: 5px;
    right: 12px;
}

.end a {
    text-decoration: none;
    color: #FFF7;
    font-size: 10px;
}


/* 背景 */
.area {
    background: linear-gradient(#4c0c96, #511164);
    background: -webkit-linear-gradient(#4c0c96, #511164);
    width: 100%;
    height: 100vh;
}

.circles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.circles li {
    position: absolute;
    display: block;
    list-style: none;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    animation: animate 25s linear infinite;
    bottom: -150px;

}

.circles li:nth-child(1) {
    left: 25%;
    width: 80px;
    height: 80px;
    animation-delay: 0s;
}


.circles li:nth-child(2) {
    left: 10%;
    width: 20px;
    height: 20px;
    animation-delay: 2s;
    animation-duration: 12s;
}

.circles li:nth-child(3) {
    left: 70%;
    width: 20px;
    height: 20px;
    animation-delay: 4s;
}

.circles li:nth-child(4) {
    left: 40%;
    width: 60px;
    height: 60px;
    animation-delay: 0s;
    animation-duration: 18s;
}

.circles li:nth-child(5) {
    left: 65%;
    width: 20px;
    height: 20px;
    animation-delay: 0s;
}

.circles li:nth-child(6) {
    left: 75%;
    width: 110px;
    height: 110px;
    animation-delay: 3s;
}

.circles li:nth-child(7) {
    left: 35%;
    width: 150px;
    height: 150px;
    animation-delay: 7s;
}

.circles li:nth-child(8) {
    left: 50%;
    width: 25px;
    height: 25px;
    animation-delay: 15s;
    animation-duration: 45s;
}

.circles li:nth-child(9) {
    left: 20%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 35s;
}

.circles li:nth-child(10) {
    left: 85%;
    width: 150px;
    height: 150px;
    animation-delay: 0s;
    animation-duration: 11s;
}

@keyframes animate {

    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
    }

    100% {
        transform: translateY(-1000px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }

}