/* 規約・プライバシー・特商法の表記。画面と同じ暗い地(純黒は使わない)、差し色は indigo。 */
:root { color-scheme: dark; color: #e7eaf3; background: #0b1020; font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", Arial, sans-serif; font-size: 15px; line-height: 1.85; }
body { margin: 0; background: #0b1020; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { display: flex; justify-content: space-between; align-items: center; padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid #222b45; }
header a.brand { font-weight: 700; color: #e7eaf3; text-decoration: none; }
a { color: #a5b4fc; text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid #a5b4fc; outline-offset: 3px; }
h1 { font-size: 26px; margin: 36px 0 8px; }
h2 { font-size: 17px; margin: 32px 0 8px; }
p, li, dd { color: #c9d0de; }
.meta { color: #8590a8; font-size: 13px; }
dl { margin: 0; }
dt { font-weight: 600; margin-top: 18px; }
dd { margin: 4px 0 0; }
footer { border-top: 1px solid #222b45; margin-top: 48px; padding-top: 16px; padding-bottom: 32px; font-size: 13px; color: #8590a8; display: flex; flex-wrap: wrap; gap: 6px 16px; }
footer a { color: #a6b0c5; }

/* 言語のメニュー(地球のボタンと popover の一覧。LP と同じ形、置き場所と矢印のキーは /lang-menu.js) */
.lang-button { display: inline-grid; place-items: center; width: 36px; height: 36px; padding: 0; border-radius: 999px; border: 1px solid #2f3a5a; background: transparent; color: #a6b0c5; cursor: pointer; anchor-name: --lang-button; }
.lang-button:hover, .lang-button:has(+ .lang-popover:popover-open) { color: #e7eaf3; border-color: #a5b4fc; }
.lang-button:focus-visible { outline: 2px solid #a5b4fc; outline-offset: 3px; }
.lang-popover { position-anchor: --lang-button; inset: auto; top: anchor(bottom); right: anchor(right); margin: 8px 0 0; min-width: 180px; max-height: min(280px, 60vh); overflow-y: auto; overscroll-behavior: contain; padding: 6px; border: 1px solid #2f3a5a; border-radius: 12px; background: #141c33; color: #e7eaf3; box-shadow: 0 18px 40px -16px rgba(2, 6, 23, 0.9); font-size: 14px; line-height: 1.5; }
.lang-popover a { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 9px 12px; border-radius: 8px; color: #a6b0c5; text-decoration: none; }
.lang-popover a:hover, .lang-popover a:focus-visible { background: #222b45; color: #e7eaf3; }
.lang-popover a:focus-visible { outline: 2px solid #a5b4fc; outline-offset: -2px; }
.lang-popover a[aria-checked="true"] { color: #e7eaf3; font-weight: 600; }
.lang-popover svg { color: #a5b4fc; flex: none; }