#backToTop{position:fixed;bottom:30px;right:30px;width:44px;height:44px;border-radius:50%;background:#2563eb;color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;box-shadow:0 4px 12px rgb(37 99 235 / .4);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity 0.3s,visibility 0.3s,transform 0.3s,background 0.2s;z-index:999}#backToTop.visible{opacity:1;visibility:visible;transform:translateY(0)}#backToTop:hover{background:#1d4ed8;transform:translateY(-3px);box-shadow:0 6px 16px rgb(37 99 235 / .5)}body.dark-theme #backToTop{background:#3b82f6;box-shadow:0 4px 12px rgb(59 130 246 / .4)}body.dark-theme #backToTop:hover{background:#2563eb}.footer{background:#f9fafb;padding:1.5rem 5%;margin-top:4rem;border-top:1px solid #e5e7eb;transition:background-color 0.3s,border-color 0.3s}.footer-container{max-width:1400px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:2rem}.footer-logo{display:flex;align-items:center}.footer-logo img{height:35px;width:auto;display:block;opacity:.9;transition:opacity 0.3s}.footer-logo img:hover{opacity:1}.footer-links{display:flex;align-items:center;gap:2.5rem;flex-wrap:wrap}.footer-link{color:#4b5563;text-decoration:none;font-size:.95rem;font-weight:500;transition:color 0.3s;position:relative}.footer-link:hover{color:#2563eb}.footer-link::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:#2563eb;transition:width 0.3s}.footer-link:hover::after{width:100%}body.dark-theme .footer{background:#2d2d2d;border-top-color:#404040}body.dark-theme .footer-link{color:#e5e7eb}body.dark-theme .footer-link:hover{color:#60a5fa}body.dark-theme .footer-link::after{background:#60a5fa}@media (max-width:768px){.footer-container{flex-direction:column;text-align:center;gap:1.5rem}.footer-links{justify-content:center;gap:1.5rem}.footer-link{font-size:.9rem}}@media (max-width:480px){.footer-links{gap:1rem}}