html.dark-mode{filter:invert(1) hue-rotate(180deg)}html.dark-mode img,html.dark-mode video,html.dark-mode iframe,html.dark-mode canvas,html.dark-mode svg image{filter:invert(1) hue-rotate(180deg)}html.dark-mode .post-thumbnail,html.dark-mode .list-item-thumb,html.dark-mode [style*="background-image"]{filter:invert(1) hue-rotate(180deg)}.wpt-fab-group{position:fixed;right:24px;bottom:24px;z-index:9999;display:flex;flex-direction:column;align-items:center;gap:10px}.wpt-fab-group button{width:44px;height:44px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;background:#333;color:#fff;box-shadow:0 2px 8px rgb(0 0 0 / .25);transition:transform 0.2s ease,opacity 0.2s ease,background 0.2s ease;padding:0;line-height:1}.wpt-fab-group button:hover{transform:scale(1.1);background:#555}.wpt-fab-group button:active{transform:scale(.95)}html:not(.dark-mode) .wpt-fab-group button{background:#222;color:#fff}#wpt-back-top{opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity 0.3s ease,transform 0.3s ease}#wpt-back-top.wpt-visible{opacity:1;pointer-events:auto;transform:translateY(0)}.wpt-fab-group button svg{width:20px;height:20px;display:block;flex-shrink:0}@media (max-width:768px){.wpt-fab-group{right:16px;bottom:16px}.wpt-fab-group button{width:40px;height:40px}}