.chat-widget{--chat-primary: #2563eb;--chat-primary-hover: #1d4ed8;--chat-bg: #ffffff;--chat-bg-secondary: #f3f4f6;--chat-text: #1f2937;--chat-text-secondary: #6b7280;--chat-border: #e5e7eb;--chat-user-bg: #2563eb;--chat-user-text: #ffffff;--chat-assistant-bg: #f3f4f6;--chat-assistant-text: #1f2937;--chat-shadow: 0 10px 40px rgba(0, 0, 0, .15);--chat-radius: 16px;--chat-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}.chat-widget.theme-dark{--chat-bg: #1f2937;--chat-bg-secondary: #374151;--chat-text: #f9fafb;--chat-text-secondary: #9ca3af;--chat-border: #374151;--chat-assistant-bg: #374151;--chat-assistant-text: #f9fafb;--chat-shadow: 0 10px 40px rgba(0, 0, 0, .3)}.chat-widget{position:fixed;z-index:9999;font-family:var(--chat-font);font-size:14px;line-height:1.5}.chat-widget.position-bottom-right{bottom:20px;right:20px}.chat-widget.position-bottom-left{bottom:20px;left:20px}.chat-toggle{width:60px;height:60px;border-radius:50%;background:var(--chat-primary);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--chat-shadow);transition:transform .2s,background .2s}.chat-toggle:hover{background:var(--chat-primary-hover);transform:scale(1.05)}.chat-toggle svg{width:28px;height:28px;fill:#fff}.chat-window{position:absolute;bottom:80px;right:0;width:380px;max-width:calc(100vw - 40px);height:520px;max-height:calc(100vh - 120px);background:var(--chat-bg);border-radius:var(--chat-radius);box-shadow:var(--chat-shadow);display:flex;flex-direction:column;overflow:hidden;opacity:0;transform:translateY(20px) scale(.95);transition:opacity .2s,transform .2s;pointer-events:none}.chat-window.is-open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}.position-bottom-left .chat-window{right:auto;left:0}.chat-header{padding:16px 20px;background:var(--chat-primary);color:#fff;display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.chat-header-title{font-weight:600;font-size:16px}.chat-header-actions{display:flex;gap:8px}.chat-header-btn{background:#fff3;border:none;border-radius:6px;padding:6px;cursor:pointer;color:#fff;transition:background .2s}.chat-header-btn:hover{background:#ffffff4d}.chat-header-btn svg{width:16px;height:16px;display:block}.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.chat-message{display:flex;flex-direction:column;max-width:85%}.chat-message.role-user{align-self:flex-end}.chat-message.role-assistant{align-self:flex-start}.chat-message-content{padding:10px 14px;border-radius:12px;word-break:break-word;white-space:pre-wrap}.chat-message.role-user .chat-message-content{background:var(--chat-user-bg);color:var(--chat-user-text);border-bottom-right-radius:4px}.chat-message.role-assistant .chat-message-content{background:var(--chat-assistant-bg);color:var(--chat-assistant-text);border-bottom-left-radius:4px}.chat-message-time{font-size:11px;color:var(--chat-text-secondary);margin-top:4px;padding:0 4px}.chat-message.role-user .chat-message-time{text-align:right}.chat-message.is-streaming .chat-message-content:after{content:"▋";animation:blink 1s infinite;margin-left:2px}@keyframes blink{0%,50%{opacity:1}51%,to{opacity:0}}.chat-error{padding:12px 16px;background:#fef2f2;color:#dc2626;font-size:13px;text-align:center;border-top:1px solid #fecaca}.theme-dark .chat-error{background:#450a0a;border-color:#7f1d1d}.chat-input-area{padding:12px 16px;border-top:1px solid var(--chat-border);display:flex;gap:8px;align-items:flex-end;flex-shrink:0}.chat-input{flex:1;border:1px solid var(--chat-border);border-radius:12px;padding:10px 14px;font-size:14px;font-family:inherit;resize:none;min-height:42px;max-height:120px;background:var(--chat-bg);color:var(--chat-text);outline:none;transition:border-color .2s}.chat-input:focus{border-color:var(--chat-primary)}.chat-input::-moz-placeholder{color:var(--chat-text-secondary)}.chat-input::placeholder{color:var(--chat-text-secondary)}.chat-send-btn{width:42px;height:42px;border-radius:12px;background:var(--chat-primary);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,opacity .2s;flex-shrink:0}.chat-send-btn:hover:not(:disabled){background:var(--chat-primary-hover)}.chat-send-btn:disabled{opacity:.5;cursor:not-allowed}.chat-send-btn svg{width:20px;height:20px;fill:#fff}@media(max-width:480px){.chat-widget.position-bottom-right,.chat-widget.position-bottom-left{bottom:10px;right:10px;left:10px}.chat-window{width:calc(100vw - 20px);right:0;left:0;bottom:70px;height:calc(100vh - 100px)}.chat-toggle{width:54px;height:54px}}