@charset "utf-8";

/* ========================
common
========================*/
:root {
    --white: #fff;
    --black: #000;
    --gray: #5f5f5f;
    --serif_ja: dnp-shuei-mincho-pr6n, "Noto Serif JP", sans-serif;
    --serif_en: 'Times New Roman', serif;
    --sansserif_ja: "Noto Sans JP", sans-serif;
    --sanserif_en:"Noto Sans", sans-serif;
}

html {
    font-size: 62.5%;
}

body {
    font-family: var(--sansserif_ja);
    font-style: normal;
    color: var(--black);
    font-weight: 400;
    background-color: var(--white);
    line-height: 1.5;
}

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

.container {
    display: flex;
    min-height: 100vh;
}

.content__wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.main {
    margin-left: 160px;
    flex: 1;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* common SP */
@media screen and (max-width: 768px) {
    .main {
        margin-left: 0;
        flex: none;
    }
    
}
/* SP 768px */

/* ========================
nav
========================*/
.nav {
    position: fixed;
    min-width: 160px;
    height: 100%;
    padding-top: 120px;
    background-color: rgba(255, 255, 255, 0.7);
    z-index: 50;
}

.nav__list {
    width: 12%;
    padding: 0 0 0 20%;
    display: flex;
    flex-direction: column;
}

.navTop__icon {
    min-width: 80px;
    max-width: 120px;
}

.navTop__mail {
    min-width: 20px;
}

.nav__item {
    font-family: var(--serif_en);
    font-size: 1.8rem;
    margin-top: 48px;
    transition: transform 0.3s;
    transform-origin: center center;
}

.nav__item a {
    display: inline-block;
    text-align: center;
}

.nav__item:first-child {
    margin-top: 0;
}

.nav__item:hover {
    transform:  scale(1.1);
}

/* nav SP */
@media screen and (max-width: 768px) {
    .container {
        display: block;
    }

    .main {
        margin-left: 0;
    }

    .nav__humberger {
        position: fixed;
        width: 60px;
        height: 60px;
        top: 40px;
        right: 20px;
        z-index: 1000;
        cursor: pointer;
    }
    
    .nav__humberger span {
        position: absolute;
        display: block;
        width: 48px;
        height: 2px;
        background-color: var(--black);
        transition: transform 0.3s ease, top 0.3s ease;
    }

    .nav__humberger span:first-child {
        top: 0;
    }

    .nav__humberger span:last-child {
        top: 12px;
    }

    .nav__humberger.active span:first-child {
        transform: translateY(7px) rotate(30deg);
    }

    .nav__humberger.active span:last-child {
        transform: translateY(-5px) rotate(-30deg);
    }    

    .nav {
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        background-color: rgba(255, 255, 255, 0.9);
        backdrop-filter: blur(3px);
        width: 100%;
        height: 100vh;
        padding: 60px 10%;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 2;
        transform: translateX(-100%);
        transition: transform 0.4s; 
    }

    .nav.active {
        transform: translateX(0);
    }

    .nav__item:hover {
        transform:  scale(1.2);
    }
    
    .nav__list {
        padding: 0 ;
    }

}
/* SP 768px */

/* ========================
footer
========================*/
.footer {
    margin: 240px 0 80px 160px;
}

.copy {
    font-family: var(--serif_en);
    font-size: 1.8rem;
    text-align: center;
    letter-spacing: 0.08em;
}

@media screen and (max-width:768px) {
    .footer {
        margin: 120px 0 40px;
    }    
}

/* ========================
post nav
========================*/
.post-nav {
    margin-top: 88px;
}

.post-nav__list {
    display: flex;
    align-items: center;
}

.post-nav__item--prev {
    margin-right: auto;
    padding-left: 32px;
}

.post-nav__item--next {
    margin-left: auto;
    padding-right: 32px;
}


/* Back & Next common */
.post-nav__item a {
    position: relative;
    display: inline-flex;
    align-items: center;
    font-family: var(--serif_en);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1;
    color: var(--gray);
    transition: color 0.3s ease, transform 0.3s ease;
}

/* Back */
.post-nav__item--prev a::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background-color: var(--gray);
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

/* Next */
.post-nav__item--next a::after {
    content: '';
    position: absolute;
    right: -24px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background-color: var(--gray);
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

/* hover */
.post-nav__item a:hover {
    color: var(--black);
    transform: scale(1.1);
}

.post-nav__item a:hover::before,
.post-nav__item a:hover::after {
    background-color: var(--black);
}

@media screen and (max-width: 768px) {
    .post-nav__item a {
        font-size: 2rem;
    }

    .post-nav__item--next a::after {
        right: -20px;
        width: 12px;
        height: 12px;
    }

    .post-nav__item--prev a::before {
        left: -20px;
        width: 12px;
        height: 12px;
    }
}