@keyframes message-fade-in{0%{opacity:0;transform:translateY(20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.message-fade-in{animation:message-fade-in .4s cubic-bezier(.16,1,.3,1)}@keyframes typing-bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-10px)}}.typing-dot{animation:typing-bounce 1.4s ease-in-out infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes pulse-dot{0%{box-shadow:0 0 0 0 rgba(34,197,94,.7)}70%{box-shadow:0 0 0 10px rgba(34,197,94,0)}to{box-shadow:0 0 0 0 rgba(34,197,94,0)}}.pulse-dot{animation:pulse-dot 2s infinite}.auto-resize{transition:height .2s ease-out;resize:none;overflow:hidden}@keyframes gradient-shift{0%{background-position:0 50%}50%{background-position:100% 50%}to{background-position:0 50%}}.gradient-text-animated{background-size:200% 200%;animation:gradient-shift 3s ease infinite}.smooth-scroll{scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.backdrop-blur-enhanced{backdrop-filter:blur(12px) saturate(180%);-webkit-backdrop-filter:blur(12px) saturate(180%)}.hover-lift{transition:transform .2s ease,box-shadow .2s ease}.hover-lift:hover{transform:translateY(-2px);box-shadow:0 8px 16px rgba(0,0,0,.1)}@media (prefers-color-scheme:dark){.hover-lift:hover{box-shadow:0 8px 16px rgba(0,0,0,.3)}}@media (max-width:768px){.message-container{max-width:85%}.chat-input-container{padding:.75rem}.sidebar-mobile{transform:translateX(-100%);transition:transform .3s cubic-bezier(.16,1,.3,1)}.sidebar-mobile.open{transform:translateX(0)}.touch-feedback{-webkit-tap-highlight-color:transparent;touch-action:manipulation}.mobile-scroll{-webkit-overflow-scrolling:touch;overscroll-behavior:contain}.mobile-slide-up{animation:mobile-slide-up .3s ease-out}@keyframes mobile-slide-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.mobile-button{min-height:44px;min-width:44px}.mobile-input{font-size:16px}}.focus-ring:focus{outline:2px solid #6366f1;outline-offset:2px;border-radius:.375rem}@keyframes shimmer{0%{background-position:-1000px 0}to{background-position:1000px 0}}.skeleton{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:1000px 100%;animation:shimmer 2s infinite}@media (prefers-color-scheme:dark){.skeleton{background:linear-gradient(90deg,#374151 25%,#4b5563 50%,#374151 75%);background-size:1000px 100%}}.custom-scrollbar::-webkit-scrollbar{width:4px}@media (min-width:769px){.custom-scrollbar::-webkit-scrollbar{width:6px}}.custom-scrollbar::-webkit-scrollbar-track{background:transparent}.custom-scrollbar::-webkit-scrollbar-thumb{background-color:rgba(156,163,175,.5);border-radius:3px}.custom-scrollbar::-webkit-scrollbar-thumb:hover{background-color:rgba(156,163,175,.7)}@media (prefers-color-scheme:dark){.custom-scrollbar::-webkit-scrollbar-thumb{background-color:rgba(75,85,99,.5)}.custom-scrollbar::-webkit-scrollbar-thumb:hover{background-color:rgba(75,85,99,.7)}}.copy-success{animation:copy-success .6s ease}@keyframes copy-success{0%{transform:scale(1)}50%{transform:scale(1.2)}to{transform:scale(1)}}.model-dropdown{transform-origin:top left;transition:opacity .2s ease,transform .2s ease}.model-dropdown.enter{opacity:0;transform:scale(.95) translateY(-10px)}.model-dropdown.enter-active,.model-dropdown.exit{opacity:1;transform:scale(1) translateY(0)}.model-dropdown.exit-active{opacity:0;transform:scale(.95) translateY(-10px)}@media (max-width:640px){.model-selector-dropdown{position:fixed!important;top:auto!important;left:1rem!important;right:1rem!important;bottom:5rem!important;max-width:calc(100vw - 2rem)!important;min-width:calc(100vw - 2rem)!important;transform:none!important;max-height:50vh!important;width:calc(100vw - 2rem)!important}.h-screen-mobile{height:100vh;height:100dvh}.safe-area-top{padding-top:env(safe-area-inset-top)}.safe-area-bottom{padding-bottom:env(safe-area-inset-bottom)}.mobile-text-sm{font-size:.875rem;line-height:1.25rem}.mobile-text-base{font-size:1rem;line-height:1.5rem}.mobile-spacing-y-2{margin-top:.5rem;margin-bottom:.5rem}.mobile-spacing-y-3{margin-top:.75rem;margin-bottom:.75rem}}@media (hover:none) and (pointer:coarse){.hover\:bg-gray-100:hover,.hover\:bg-gray-50:hover{background-color:transparent}.touch-active:active{background-color:rgba(0,0,0,.05);transform:scale(.98)}.dark .touch-active:active{background-color:hsla(0,0%,100%,.05)}}@media (prefers-reduced-motion:reduce){.copy-success,.gradient-text-animated,.message-fade-in,.mobile-slide-up,.pulse-dot,.typing-dot{animation:none}.hover-lift,.model-dropdown{transition:none}}@media (prefers-contrast:high){.border-gray-200\/60{border-color:#000}.dark .border-gray-700\/60{border-color:#fff}.bg-white\/80{background-color:#fff}.dark .bg-gray-900\/80{background-color:#000}}