/** スクロール量を円周で示す、全ページ共通の「TOPへ戻る」ボタン。 */
.scroll-to-top{position:fixed;right:28px;bottom:28px;z-index:calc(var(--z-header) + 1);display:grid;place-items:center;width:64px;height:64px;padding:0;border:1px solid rgba(16,80,135,.12);border-radius:50%;background:rgba(255,253,248,.96);box-shadow:0 8px 24px rgba(9,46,78,.16);color:#0879cb;cursor:pointer;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(12px);transition:opacity .3s ease,visibility .3s ease,transform .3s ease,box-shadow .2s ease,background-color .2s ease;-webkit-tap-highlight-color:transparent}
.scroll-to-top.is-visible{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.scroll-to-top.is-visible.is-over-footer{opacity:0;visibility:hidden;pointer-events:none;transform:translateY(12px)}
.scroll-to-top:hover{background:#fff;box-shadow:0 10px 30px rgba(13,106,172,.26)}
.scroll-to-top:focus-visible{outline:3px solid rgba(19,137,207,.38);outline-offset:3px}
.scroll-to-top__progress{position:absolute;inset:0;width:100%;height:100%;transform:rotate(-90deg);pointer-events:none}
.scroll-to-top__track,.scroll-to-top__value{fill:none;stroke-width:1.6}
.scroll-to-top__track{stroke:rgba(47,132,191,.16)}
.scroll-to-top__value{stroke:#1389cf;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1}
.scroll-to-top__content{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-family:"Noto Sans JP",sans-serif;font-size:11px;font-weight:600;line-height:1;letter-spacing:.08em}
.scroll-to-top__arrow{display:block;width:20px;height:12px;transition:transform .2s ease}
.scroll-to-top__arrow path{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.scroll-to-top:hover .scroll-to-top__arrow,.scroll-to-top:focus-visible .scroll-to-top__arrow{transform:translateY(-2px)}
@media(max-width:1023px){.scroll-to-top{right:22px;bottom:22px;width:60px;height:60px}}
@media(max-width:767px){.scroll-to-top{right:16px;bottom:max(18px,env(safe-area-inset-bottom));width:54px;height:54px}.scroll-to-top__content{gap:3px;font-size:10px}.scroll-to-top__arrow{width:18px;height:11px}}
@media(prefers-reduced-motion:reduce){.scroll-to-top,.scroll-to-top__arrow{transition:none}}