:root {
    --neon-text: #afeeee;
    --neon-text-n: #6a5d21;
}

body {
    font-family: serif;
    background: #333;
    color: #fff;
    font-size: clamp(15px, 15px + 0.5vw, 21px);
    line-height: 1.7;
    letter-spacing: 0.08em;
    position: relative;
}
body .b {
    font-weight: bold;
}
body .r {
    color: #ff6347;
}
body .g {
    color: #66cdaa;
}
body .header {
    height: 100vh;
    color: #fff;
    background-image: url('/images/header.avif');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    filter: grayscale(80%);
}
body .header h1 {
    position: absolute;
    bottom: 20%;
    right: 0%;
    background: rgba(0, 200, 255, 0.7);
    padding: calc(1vw + 1vh) calc(3vw + 3vh);
    font-size: clamp(25px, 2vw, 60px);
}
body .header .copy {
    position: absolute;
    bottom: 40%;
    right: 0;
    background: rgba(0, 200, 255, 0.7);
    padding: calc(1vw + 1vh) calc(3vw + 3vh);
    font-size: clamp(25px, 2vw, 60px);
}
@media (max-width: 1000px) {
    body .header {
        background-position: 40%;
    }
    body .header h1,
    body .header .copy {
        background: rgba(0, 200, 255, 0.5);
    }
}
body .nav {
    background: rgba(45, 45, 45, 0.9);
    position: sticky;
    z-index: 99;
    top: 0;
    left: 0;
    visibility: hidden;
}
body .nav ul {
    list-style: none;
    height: 10vh;
    display: flex;
}
body .nav ul li {
    width: 25%;
    height: 100%;
    line-height: 10vh;
    font-weight: bold;
    text-align: center;
}
body .nav ul li a {
    color: #fff;
}
body .nav ul li:hover {
    transition: 0.4s;
    text-shadow: -0.1rem -0.1rem 0.5rem var(--neon-text), 0.1rem 0.1rem 0.5rem var(--neon-text),
        0 0 1rem var(--neon-text-n), 0 0 2rem var(--neon-text-n), 0 0 3rem var(--neon-text-n),
        0 0 4rem var(--neon-text-n), 0 0 5rem var(--neon-text-n);
}
@media (max-width: 1000px) {
    body .nav {
        display: none !important;
    }
}
body .header-button {
    display: none;
}
@media (max-width: 1000px) {
    body .header-button {
        width: calc(6vw + 35px);
        height: calc(6vw + 35px);
        position: fixed;
        top: 2vw;
        right: 2vw;
        z-index: 99;
        display: block;
        background-image: url('/images/hum.avif');
        background-size: cover;
    }
    body .cross {
        transition: opacity 0.5s;
        background-image: url('/images/batsu.avif');
    }
}
@keyframes ro {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}
body .navi {
    position: absolute;
    top: 0;
    width: 25vw;
    height: 100vh;
    float: left;
    background: #333;
}
body .navi .site {
    margin: 1vw 2vw;
    padding: 3vw 2vw 3vw 2vw;
    text-shadow: -0.1rem -0.1rem 0.5rem var(--neon-text), 0.1rem 0.1rem 0.5rem var(--neon-text),
        0 0 1rem var(--neon-text-n), 0 0 2rem var(--neon-text-n), 0 0 3rem var(--neon-text-n),
        0 0 4rem var(--neon-text-n), 0 0 5rem var(--neon-text-n);
    font-size: clamp(18px, 1.2vw + 8px, 32px);
    font-weight: bold;
    letter-spacing: 0.2em;
    text-align: center;
    display: block;
}
body .navi ul {
    margin-top: 10vh;
    height: 60vh;
    font-weight: bold;
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-around;
}
body .navi ul li a {
    letter-spacing: 0.15em;
    color: #eee;
}
body .navi ul li:hover {
    transition: 0.4s;
    text-shadow: -0.1rem -0.1rem 0.5rem var(--neon-text), 0.1rem 0.1rem 0.5rem var(--neon-text),
        0 0 1rem var(--neon-text-n), 0 0 2rem var(--neon-text-n), 0 0 3rem var(--neon-text-n),
        0 0 4rem var(--neon-text-n), 0 0 5rem var(--neon-text-n);
}
@media (max-width: 1000px) {
    body {
        position: relative;
    }
    body header {
        height: 70vh;
    }
    body .navi {
        visibility: visible;
        opacity: 0;
        height: 0vh;
        width: 100vw;
        position: fixed;
        top: 0;
        left: 0;
        float: none;
    }
    body .navi .site {
        padding: 3vw;
        margin: calc(5vh + 80px) 0 calc(3vh + 50px) 0;
        font-size: calc(2.5vw + 14px);
    }
    body .navi ul {
        margin-top: 0;
        height: 45vh;
        font-size: calc(0.8vw + 14px);
    }
    body .navi-block {
        height: 100vh;
        z-index: 50;
        opacity: 1;
        visibility: visible;
        transition: 0.4s;
    }
}
body main .article-white {
    background: #444;
}
body main article {
    padding: 7vh calc(3vw + 20px) 5vh calc(3vw + 20px);
}
body main article h2 {
    font-size: clamp(25px, 2vw, 50px);
    font-weight: bold;
    letter-spacing: 0.15em;
    line-height: 5;
}
body main article .h2 {
    font-size: clamp(23px, 1.9vw, 50px);
}
body main article .h22 {
    font-size: clamp(21px, 1.8vw, 50px);
}
body main article p {
    line-height: 3;
    font-size: clamp(15px, 15px + 0.5vw, 22px);
    letter-spacing: 0.15em;
}
body main article img {
    width: calc(33% + 200px);
    background: #fff;
    margin: calc(1vw + 10px) 0;
}
@media (max-width: 800px) {
    body main article img {
        width: 100%;
    }
}
@media (min-width: 1000px) {
    body main article {
        padding: 7vh calc(30vw - 50px) 7vh;
    }
}
body main .d1 {
    background: #333;
    color: #fff;
}
body main .d2 {
    background: #222;
    color: #fff;
}
body main .d3 {
    background: #111;
    color: #fff;
}
body main .server {
    width: 100%;
}
body .button {
    margin: calc(3vw + 50px) auto;
    width: calc(10vw + 200px);
    display: block;
    text-align: center;
    --hover-shadows: 16px 16px 33px #333, -16px -16px 33px #333;
    --accent: fuchsia;
    --accent: white;
    font-weight: bold;
    letter-spacing: 0.3em;
    border: none;
    border-radius: 1.1em;
    background-color: #222;
    background-color: #001e43;
    cursor: pointer;
    color: white;
    padding: 1em 2em;
    transition: box-shadow ease-in-out 0.3s, background-color ease-in-out 0.1s, letter-spacing ease-in-out 0.1s,
        transform ease-in-out 0.1s;
    box-shadow: 13px 13px 10px #1c1c1c, -13px -13px 10px #262626;
    box-shadow: var(--hover-shadows);
}
body .button:hover {
    box-shadow: var(--hover-shadows), var(--accent) 0px 0px 30px 5px;
}
body .button:active {
    box-shadow: var(--hover-shadows), var(--accent) 0px 0px 30px 5px;
    background-color: var(--accent);
    transform: scale(0.95);
}
@media (max-width: 1000px) {
    body .button,
    body .button:hover,
    body .button:active {
        box-shadow: var(--hover-shadows), var(--accent) 0px 0px 20px 2px;
    }
}
body footer {
    background: #333;
    height: 20vh;
    text-align: center;
}
body footer span {
    font-size: clamp(15px, 15px + 0.5vw, 22px);
    letter-spacing: 0.15em;
    line-height: 20vh;
}
@media (max-width: 800px) {
    body footer {
        height: calc(1vw + 90px);
    }
    body footer span {
        line-height: calc(1vw + 90px);
    }
}