:root {
    --header-h: 72px;
    --indigoblue: #1A237E;
}

* {
    box-sizing: border-box
}

html,
body {
    margin: 0
}

body {
    font-family: system-ui, -apple-system, "Noto Sans JP", sans-serif;
}

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-h);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    pointer-events: none;
    width: 100vw;
}

.header-inner {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    pointer-events: auto
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px
}

.header-sns a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-left: 10px;
    background: rgba(0, 0, 0, .55);
    color: #fff;
    text-decoration: none;
    font: 700 12px/1 system-ui, -apple-system, "Noto Sans JP", sans-serif
}

.header-sns a .fab {
font-size: 25px;
}

.header-sns a .fas {
    font-size: 20px;
}

.hamburger {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 0;
    cursor: pointer;
    background: rgba(0, 0, 0, .75);
    color: #fff;
    display: grid;
    place-items: center
}

.hamburger span,
.hamburger span:before,
.hamburger span:after {
    content: "";
    display: block;
    width: 18px;
    height: 2px;
    background: #fff;
    position: relative;
    transition: .25s
}

.hamburger span:before {
    position: absolute;
    top: -6px
}

.hamburger span:after {
    position: absolute;
    top: 6px
}

/* ① SPのみ：サイト名を左上に（白枠ナシ） */
.mobile-brand {
    position: absolute;
    left: 12px;
    top: 12px;
    pointer-events: auto;
    display: block
}

.mobile-brand a {
    color: #fff;
    text-decoration: none;
    font-weight: 800;
    letter-spacing: .08em;
    background: transparent;
    padding: 0
}

/* ② PC(>=1024px)：左端に概要テキスト */
.desktop-summary {
    position: static;
    left: auto;
    top: auto;
    width: auto;
    height: auto;
    overflow: hidden;
    display: none;
}


@media(min-width:1024px) {
    .desktop-summary {
        position: fixed;
        left: 16px;
        top: 16px;
        display: block;
    }
}

.center-logo {
    display: none
}

.side-nav {
    position: fixed;
    left: 12px;
    top: calc(var(--header-h) + 12px);
    z-index: 900;
    display: none;
    gap: 6px;
    flex-direction: column
}

.side-nav a {
    display: block;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .85);
    color: #333;
    text-decoration: none;
    font: 600 12px/1.2 system-ui, "Noto Sans JP", sans-serif;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .08)
}

.drawer {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: none
}

.drawer.is-open {
    display: block
}

.drawer__scrim {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, .45)
}

.drawer__panel {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    width: 100%;
    max-width: 280px;
    background: #f5f5f5;
    color: var(--indigoblue);
    padding: 24px 20px;
    overflow: auto;
}

.drawer__panel a {
    color: var(--indigoblue);
    text-decoration: none
}

.drawer__close {
    position: absolute;
    right: 14px;
    top: 14px;
    background: transparent;
    border: 0;
    color: var(--indigoblue);
    font-size: 28px;
    cursor: pointer
}

.menu-primary {
    list-style: none;
    padding-left: 0;
    margin-top: 50px
}

.menu-primary li {
    margin: 0 0 14px
}

@media(min-width:1024px) {
    .side-nav {
        display: flex
    }

    .mobile-brand {
        display: none
    }
}


/*******************************************************
aside　ハンバーガーメニュー内
*******************************************************/
.menu-primary ul {
    list-style-type: "ー ";
}