.fab-btn{--fab-size:56px;--fab-bg:#1d4ed8;--fab-bg-active:#1e40af;--fab-ink:#ffffff;--fab-gap:16px;--fab-nav-height:56px;display:none;position:fixed;right:calc(16px + env(safe-area-inset-right,0px));bottom:calc(var(--fab-nav-height) + var(--fab-gap) + env(safe-area-inset-bottom,0px));z-index:480;align-items:center;justify-content:center;width:var(--fab-size);height:var(--fab-size);border:none;border-radius:50%;background:var(--fab-bg);color:var(--fab-ink);box-shadow:0 4px 12px rgba(0,0,0,.3);cursor:pointer;-webkit-tap-highlight-color:transparent;overflow:hidden;transition:filter .2s ease,transform .2s ease,box-shadow .2s ease,opacity .2s ease,visibility .2s ease}.fab-icon{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:28px;font-weight:400;line-height:1;pointer-events:none}.fab-btn:hover{filter:brightness(1.1)}.fab-btn:active{transform:scale(.95);background:var(--fab-bg-active);box-shadow:0 2px 6px rgba(0,0,0,.3)}.fab-btn:focus{outline:0}.fab-btn:focus-visible{outline:3px solid #ffffff;outline-offset:2px;box-shadow:0 0 0 5px rgba(29,78,216,.45)}.fab-btn.fab-hidden{opacity:0;visibility:hidden;transform:scale(.8);pointer-events:none}.fab-ripple{position:absolute;width:8px;height:8px;margin-left:-4px;margin-top:-4px;border-radius:50%;background:rgba(255,255,255,.55);transform:scale(0);animation:fab-ripple-expand .5s ease-out;pointer-events:none}@keyframes fab-ripple-expand{to{transform:scale(14);opacity:0}}@media (max-width:359px){.fab-btn{--fab-size:52px}.fab-icon{font-size:26px}}@media (prefers-reduced-motion:reduce){.fab-btn{transition:none}.fab-ripple{animation:none;display:none}}@media (max-width:639px){.fab-btn{display:flex}}