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#ddd;font-size:14px;resize:none;font-family:inherit;line-height:1.4;min-height:40px;max-height:100px;background:#fff;color:#333}.chat-input::placeholder{color:#999}.chat-input:disabled{opacity:.5}.chat-send-btn{width:40px;height:40px;border-radius:8px;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .15s;background:#e5e7eb;color:#999}.chat-send-btn-active{background:#4f46e5;color:#fff;cursor:pointer}.chat-send-btn:disabled{cursor:not-allowed}.chat-footer{padding:8px 16px;border-top:1px solid #f3f4f6;text-align:center;font-size:11px;color:#bbb;flex-shrink:0}.chat-bubble-btn{position:fixed;bottom:24px;right:24px;width:56px;height:56px;border-radius:50%;border:none;background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px #4f46e566;z-index:10000;transition:transform .2s ease,box-shadow .2s ease}.chat-bubble-btn:hover{transform:scale(1.05);box-shadow:0 6px 20px #4f46e580}.chat-bubble-btn:active{transform:scale(.95)}.chat-bubble-btn-hidden{opacity:0;pointer-events:none;transform:scale(.8)}.chat-unread-dot{position:absolute;top:2px;right:2px;width:12px;height:12px;border-radius:50%;background:#ef4444;border:2px solid #fff}html.dark .chat-drawer{background:#1a1a1a}html.dark .chat-drawer-header{border-bottom-color:#333}html.dark .chat-drawer-title{color:#f5f5f5}html.dark .chat-close-btn{color:#aaa}html.dark .chat-close-btn:hover{color:#fff}html.dark .chat-banner-calculated{background:#0f2e1a;color:#86efac;border-bottom-color:#166534}html.dark .chat-banner-not-calculated{background:#2e2206;color:#fcd34d;border-bottom-color:#92400e}html.dark .chat-empty{color:#666}html.dark .chat-empty-sub{color:#555}html.dark .chat-bubble-assistant{background:#262626;color:#e5e5e5}html.dark .chat-typing{background:#262626}html.dark .chat-typing-dot{background:#666}html.dark .chat-suggestion{background:#262626;border-color:#444;color:#818cf8}html.dark .chat-suggestion:hover{background:#333}html.dark .chat-input-bar{border-top-color:#333}html.dark .chat-input{background:#262626;border-color:#555;color:#e5e5e5}html.dark .chat-input::placeholder{color:#666}html.dark .chat-footer{border-top-color:#333}@keyframes chatTypingPulse{0%,to{opacity:.3}50%{opacity:1}}