html,
body {
    font-size: 16px;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
	font-family:"MS Pゴシック",sans-serif;
}

/* ヘッダーコンテンツ */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: url('../img/sub/mold.png') no-repeat center center fixed;
    background-size: cover;
    opacity: 0.3;
    z-index: -1;
    pointer-events: none;
}

.header-content {
    z-index: 9999;
    position: relative;
    display: flex;
    align-items: center;
    flex-direction: column;
    background-color: #ffffff;
    width: 100%;
}

.header-content__group {
    display: flex;
    align-items: center;
    width: 960px;
    height: 90px;
}

.header-logo {
    width: 85px;
    height: 60px;
    margin-left: 30px;
    margin-top: 10px;
    margin-right: 10px;
    margin-bottom: 10px;
}

.header-message {
    display: flex;
    justify-content: center;
    flex-direction: column;
    margin-top: 10px;
    margin-bottom: 10px;
}

.header-message__title,
.header-message__content {
    margin: 0;
    padding: 0;
}

.mini_nav {
    display: none;
    position: fixed;
    top: 0;
    left: calc(100% - 80px);
}

nav {
    width: 100%;
}

.nav-link li {
    list-style: none;
}

.nav-link {
    display: flex;
    justify-content: center;
    background-color: #0099ff;
    margin: 0;
    padding: 0;
}

.nav-link__menu--on {
    display: block;
    text-align: center;
    background-color: #0066cc;
    width: 138px;
    padding-top: 10px;
    padding-bottom: 10px;
    border-left: 1px dashed #ffffff;
    border-right: 1px dashed #ffffff;
    box-sizing: border-box;
}

.nav-link__menu {
    display: block;
    text-align: center;
    background-color: #0099ff;
    width: 138px;
    padding-top: 10px;
    padding-bottom: 10px;
    border-left: 1px dashed #ffffff;
    border-right: 1px dashed #ffffff;
    box-sizing: border-box;
}

.nav-link__menu:hover,
.nav-link__menu:hover a {
    color: #000000;
    background-color: #ffcc33;
}

.nav-link__menu--on,
.nav-link__menu {
    display: block;
    color: #ffffff;
    text-decoration: none;
}

input[type="checkbox"] {
    display: none;
}

.menu-icon {
    width: 75px;
    cursor: pointer;
}

.menu-icon--open {
    display: block;
}

.menu-icon--close {
    display: none;
}

ul.mini-menu {
    display: block;
    position: absolute;
    list-style: none;
    padding: 0;
    margin: 0;
    display: none;
    background: #0099ff;
    top: 75px;
    left: -175px;
    width: 250px;
}

ul.mini-menu li {
    border-bottom: 2px dashed #ffffff;
}

input[type="checkbox"]:checked~label .menu-icon--open {
    display: none;
}

input[type="checkbox"]:checked~label .menu-icon--close {
    display: block;
}

input[type="checkbox"]:checked~ul.mini-menu {
    display: block;
}

.mini-menu__link {
    padding: 20px 10px;
    display: block;
    text-decoration: none;
    color: #ffffff;
}

.main-content {
    width: 960px;
    margin-left: auto;
    margin-right: auto;
    background-color: #ffffff;
    z-index: 1;
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-info {
    padding-top: 10px;
    padding-bottom: 15px;
    height: 20px;
    background-color: #0099ff;
    color: #ffffff;
    text-align: center;
}

@media(max-width: 980px) {
    .header-content__group {
        width: 100%;
        align-items: left;
    }

    .nav-link__menu,
    .nav-link__menu--on {
        width: 120px;
    }
}

@media(max-width: 860px){
    .nav-link>li:first-child {
        display: none;
    }
}

@media(max-width: 740px){
    .nav-link {
        display: none;
    }
    .mini_nav {
        display: block;
    }
    .header-content__group {
        height: 75px;
        background-color: #ffffff;
        position: fixed;
    }
    .main-content {
        margin-top: 75px;
    }
}

@media(max-width:720px) {
    .header-message__content {
        display: none;
    }
}

@media(max-width:500px) {
    .arrow-message {
        display: none;
    }
}

@media(max-width:485px) {

    .main-content {
        margin-top: 60px;
    }

    .menu-icon {
        width: 60px;
        height: 60px;
    }

    .mini_nav {
        left: calc(100% - 65px);
    }

    ul.mini-menu {
        top: 60px;
        left: -190px;
    }

    .header-content__group {
        height: 60px;
        background-color: #ffffff;
        position: fixed;
    }

    .header-message__title {
        font-size: 24px;
    }

    .header-logo {
        width: 60px;
        height: 42px;
        margin-left: 10px;
        margin-top: 10px;
        margin-right: 10px;
        margin-bottom: 10px;
    }
}

@media(max-width:375px) {
    .header-message__title {
        font-size: 18px;
    }
}