.back-to-top{position:fixed;bottom:1.5rem;right:1.5rem;z-index:1000;width:44px;height:44px;border-radius:50%;border:none;background:var(--tmd-accent,#0071e3);color:#fff;box-shadow:0 2px 12px rgba(0,113,227,.25);backdrop-filter:blur(6px);transition:all .25s cubic-bezier(.4,0,.2,1);opacity:0;visibility:hidden;transform:translateY(15px) scale(.85);outline:0;-webkit-tap-highlight-color:transparent}.back-to-top--visible{opacity:1;visibility:visible;transform:translateY(0) scale(1)}.back-to-top:focus,.back-to-top:hover{background:var(--tmd-accent-hover,#0056b3);box-shadow:0 4px 20px rgba(0,113,227,.35);transform:translateY(-2px) scale(1.08)}.back-to-top:active{transform:translateY(-1px) scale(1.04);box-shadow:0 3px 16px rgba(0,113,227,.3)}.back-to-top svg{width:18px;height:18px;display:block;margin:0 auto;transition:transform .2s ease}.back-to-top:focus svg,.back-to-top:hover svg{transform:translateY(-1px)}.back-to-top:focus{outline:2px solid rgba(255,255,255,.8);outline-offset:2px}@media (prefers-contrast:high){.back-to-top{border:2px solid #fff;box-shadow:0 4px 20px rgba(0,0,0,.5)}.back-to-top:focus,.back-to-top:hover{border-color:#000;box-shadow:0 8px 32px rgba(0,0,0,.7)}}@media (prefers-reduced-motion:reduce){.back-to-top{transition:opacity .2s ease,visibility .2s ease}.back-to-top:active,.back-to-top:focus,.back-to-top:hover{transform:none}.back-to-top svg{transition:none}.back-to-top:focus svg,.back-to-top:hover svg{transform:none}}@media (min-width:700px) and (max-width:999px){.back-to-top{bottom:1.25rem;right:1.25rem;width:40px;height:40px}.back-to-top svg{width:16px;height:16px}}@media (max-width:699px){.back-to-top{bottom:1rem;right:1rem;width:48px;height:48px}.back-to-top svg{width:20px;height:20px}.back-to-top::before{content:'';position:absolute;top:-8px;left:-8px;right:-8px;bottom:-8px;z-index:-1}.back-to-top--footer-visible{bottom:3rem}}@media (max-width:699px) and (orientation:landscape){.back-to-top{bottom:.25rem;right:.25rem}}@media print{.back-to-top{display:none!important}}@media (prefers-color-scheme:dark){.back-to-top{background:var(--tmd-accent-dark,#00bcd4);box-shadow:0 4px 20px rgba(0,188,212,.3)}.back-to-top:focus,.back-to-top:hover{background:var(--tmd-accent-dark-hover,#0097a7);box-shadow:0 8px 32px rgba(0,188,212,.4)}}:root{--back-to-top-size:44px;--back-to-top-size-tablet:40px;--back-to-top-size-mobile:36px;--back-to-top-size-small:32px;--back-to-top-spacing:1.5rem;--back-to-top-spacing-tablet:1.25rem;--back-to-top-spacing-mobile:0.75rem;--back-to-top-spacing-small:0.5rem}