@charset "UTF-8";

/* ====================
common
==================== */

.html{
    font-size: 62.5%;
}


body {
    align-items: center;
    min-height: 100svh;
    width: 100%;
    font-family: "Lato", "Noto Sans JP", Arial;
    position: relative;
    background-color: #051320;
    color: #535353;
    z-index: -100;
}

img {
    max-width: 100%;
    height: auto;    
}

/* ヘッダー */
.header {
    position: fixed;
    width: 90%;
    top: 0;
    left: 0;
    padding: 20px 4.8% 20px;
    backdrop-filter: blur(15px);
    /* border-bottom: 1px solid rgba(255, 255, 255, 0.1); */
    z-index: 100;
    justify-content: space-between;
    display: flex;
    align-items: center;
}

.header__menu {
    padding-top: 20px;
}

.logo {
    width: 35%;
    height: 35%;
}

.header__btn {
    width: 15px;
    padding-right: 15px;
}

.nav {
    background: rgb(100, 100, 100);
    width: 50%;
    height: 100vh;
    padding: 0;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    transform: translateX(200%);
    transition: transform 0.4s;
}

.site__title {
    display: none;
}

.nav.active {
    transform: translateX(100%);
}

.nav__topic {
    padding-top: 15px;
    color: #ff6600;
    font-size: 1.2rem;
    font-weight: 500;
    text-align: center;
}

.nav__item {
    padding: 15px 6.4% 10px;
}

.nav__item a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    padding: 25px 0 40px;
}

.nav__item a:hover {
    color: #ff6600;
    /* background-color: #ff6600; */
}

.nav__btn {
    display: block;
    width: 15px;
    height: 15px;
    cursor: pointer;
    position: absolute;
    top: 32px;
    right: 2.4%;
    justify-content: right;
    padding-right: 15px;
}

/* About PC */
/* header */

@media screen and (min-width:769px) {
    .header {
        margin: 0 auto;
        justify-content: space-between;
        width: 95dvw;
        display: flex;
        align-items: center;
    }
    
    .header__btn {
        display: none;
    }

    .nav__item {
        display: flex;
        gap: 30px;  
        text-align: right;
        padding: 0;
    }

    .nav__item a {
        padding: 25px 0 0;
    }

    .nav__btn {
        display: none;
    }

    .nav__topic {
        display: none;
    }

    .nav{
        align-items: center;
        background: transparent;
        width: auto;
        height: auto;
        padding: 0;
        position: static;
        transform: translate(0);
    }

    .header__topic {
        font-family: sans-serif;
        font-weight: 700;
        font-size: 1.8rem;
        line-height: 1.3;
        color: #0f2350;
    }

    /* .site__title {
        display: block;
        color: #ff6600;
        font-size: 1.8rem;
        text-align: center;
    } */

    .header__menu {
        display: flex;
        gap: 30px;
        margin-left: auto;
        padding-top: 0;
        padding-right: 50px;
    }
}

/* footer */

.footer {
    color: #fff;
}

.menu__list {
    display: flex;
    width: 95%;
    justify-content: right;
}

.menu__item {
    padding-right: 20px;
}

.copy {
    font-size: 0.9rem;
    text-align: center;
    padding: 10px;
}