@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+JP&display=swap');

html {
    font-family: "IBM Plex Sans JP", sans-serif;
}
body {
    position: relative;
    margin: 0;
    background: linear-gradient(#021A47, #031F25);
    min-height: 100vh;
    overflow: hidden;
    user-select: none;
}

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

#back {
    position: absolute;
    top: calc(50vh - 100px);
    width: 100vw;
    height: auto;
    background: rgba(0,0,0,0.8);
    box-shadow: 0 0 5px rgba(0,0,0,0.8);
    animation: forwards 2.5s ease-out back-animation;
}
@keyframes back-animation {
    0%   { opacity: 0; }
    100% { opacity: 1; }
}

#line {
    width: 100%;
    height: 5px;
    background: #8479B7;
    box-shadow: 0 0 15px #8479B7;
}

#title {
    position: relative;
    /*top: calc(50vh - 100px);*/
    width: 100%;
    padding: 15px 0 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 0 15px rgba(255,255,225,0.6);
}
#title h1 {
    margin: 0;
    font-size: 45px;
    font-weight: normal;
    color: whitesmoke;
    line-height: 60px;
}
#title div {
    color: lightgray;
}
#title .desc {
    font-size: 15px;
}
#title img[alt="i"] {
    display: block;
    width: 70px;
    height: 70px;
    margin-right: 15px;
    border-radius: 4px;
    box-shadow: 0 0 15px rgba(255,255,255,0.5);
}

footer {
    position: fixed;
    bottom: 20px;
    text-align: center;
    width: 100%;
    color: rgba(255, 255, 255, 0.4);
    font-size: 15px;
}