:root{--chat-color-primary:#2563eb;--chat-color-secondary:#3b82f6;--chat-color-background:#ffffff;--chat-color-surface:#f8fafc;--chat-color-border:#e5e7eb;--chat-color-text-primary:#1f2937;--chat-color-text-secondary:#6b7280;--chat-color-text-muted:#9ca3af;--chat-color-user-message:#2563eb;--chat-color-bot-message:#f8fafc;--chat-color-bot-message-border:#e5e7eb;--chat-font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--chat-font-size-base:16px;--chat-line-height:1.5;--chat-border-radius:18px;--chat-border-radius-small:8px;--chat-spacing-xs:4px;--chat-spacing-sm:8px;--chat-spacing-md:16px;--chat-spacing-lg:24px;--chat-spacing-xl:32px}.chat-container{font-family:var(--chat-font-family);font-size:var(--chat-font-size-base);line-height:var(--chat-line-height)}.chat-message-enter{animation:slideInUp .3s ease-out}@keyframes slideInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.chat-input-focus{transition:all .2s ease-in-out}.chat-input-focus:focus{transform:translateY(-1px);box-shadow:0 4px 12px -2px rgba(37,99,235,.1)}.typing-indicator{display:flex;align-items:center;gap:4px}.typing-dot{width:8px;height:8px;border-radius:50%;background-color:#9ca3af;animation:typing 1.4s ease-in-out infinite}.typing-dot:first-child{animation-delay:-.32s}.typing-dot:nth-child(2){animation-delay:-.16s}@keyframes typing{0%,80%,to{transform:scale(.8);opacity:.5}40%{transform:scale(1);opacity:1}}.send-button{transition:all .2s ease-in-out}.send-button:hover:not(:disabled){transform:scale(1.05);box-shadow:0 4px 8px -2px rgba(37,99,235,.3)}.send-button:active:not(:disabled){transform:scale(.95)}.message-bubble{transition:all .15s ease-in-out}.message-bubble:hover{transform:translateY(-1px)}.custom-scrollbar{scrollbar-width:thin;scrollbar-color:#e5e7eb transparent}.custom-scrollbar::-webkit-scrollbar{width:6px}.custom-scrollbar::-webkit-scrollbar-track{background:transparent}.custom-scrollbar::-webkit-scrollbar-thumb{background-color:#e5e7eb;border-radius:3px}.custom-scrollbar::-webkit-scrollbar-thumb:hover{background-color:#d1d5db}.avatar-bounce{transition:transform .2s ease-in-out}.avatar-bounce:hover{transform:scale(1.1)}@media (max-width:768px){:root{--chat-spacing-lg:16px;--chat-spacing-md:12px}.chat-message-mobile{max-width:85%}.chat-container-mobile{padding:var(--chat-spacing-md)}}@media (prefers-color-scheme:dark){:root{--chat-color-background:#111827;--chat-color-surface:#1f2937;--chat-color-text-primary:#f9fafb;--chat-color-text-secondary:#d1d5db;--chat-color-border:#374151}}@media (prefers-contrast:high){:root{--chat-color-text-primary:#000000;--chat-color-text-secondary:#333333;--chat-color-border:#666666}}@media (prefers-reduced-motion:reduce){.avatar-bounce,.chat-message-enter,.message-bubble,.send-button{animation:none;transition:none}}.focus-visible{outline:2px solid var(--chat-color-primary);outline-offset:2px}.loading-shimmer{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:200% 100%;animation:shimmer 2s infinite}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}