*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #4285f4;--primary-hover: #3367d6;--background: #ffffff;--surface: #f8f9fa;--surface-hover: #e8eaed;--border: #dadce0;--text-primary: #202124;--text-secondary: #5f6368;--shadow: 0 1px 3px rgba(0, 0, 0, .12), 0 1px 2px rgba(0, 0, 0, .24);--shadow-hover: 0 3px 6px rgba(0, 0, 0, .16), 0 3px 6px rgba(0, 0, 0, .23)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";background-color:var(--background);color:var(--text-primary);line-height:1.6}.app-container{display:flex;flex-direction:column;height:100vh;max-width:1200px;margin:0 auto}.app-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;border-bottom:1px solid 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0 0 3px #4285f41a}.chat-container{flex:1;overflow-y:auto;padding:24px;background:var(--background)}.messages-list{display:flex;flex-direction:column;gap:24px;max-width:800px;margin:0 auto}.message{display:flex;gap:16px;animation:fadeIn .3s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message-avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:18px;font-weight:500}.message.user .message-avatar{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.message.assistant .message-avatar{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff}.message-content{flex:1;padding-top:2px}.message-text{font-size:15px;line-height:1.6;color:var(--text-primary);white-space:pre-wrap;word-wrap:break-word}.message-image-container{margin-top:12px;display:inline-block;max-width:100%}.message-image{border-radius:12px;overflow:hidden;box-shadow:var(--shadow);display:inline-block;max-width:100%}.message-image img{max-width:100%;height:auto;display:block}.download-button{margin-top:8px;padding:8px 16px;background:var(--surface);color:var(--text-primary);border:1px solid var(--border);border-radius:8px;font-size:14px;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:6px;font-family:inherit}.download-button:hover{background:var(--surface-hover);border-color:var(--primary-color);color:var(--primary-color)}.download-button:active{transform:scale(.98)}.message-time{font-size:12px;color:var(--text-secondary);margin-top:8px}.input-container{border-top:1px solid var(--border);padding:16px 24px;background:var(--background)}.input-wrapper{max-width:800px;margin:0 auto;display:flex;gap:12px;align-items:flex-end}.input-box{flex:1;display:flex;border:1px solid var(--border);border-radius:24px;background:var(--surface);transition:all .2s;padding:4px}.input-box:focus-within{background:var(--background);border-color:var(--primary-color);box-shadow:0 0 0 3px #4285f41a}.input-box textarea{flex:1;border:none;outline:none;background:transparent;padding:12px 16px;font-size:15px;resize:none;max-height:200px;font-family:inherit;color:var(--text-primary)}.input-box textarea::placeholder{color:var(--text-secondary)}.send-button{padding:12px 24px;background:var(--primary-color);color:#fff;border:none;border-radius:20px;font-size:15px;font-weight:500;cursor:pointer;transition:all .2s;white-space:nowrap}.send-button:hover:not(:disabled){background:var(--primary-hover);box-shadow:var(--shadow-hover)}.send-button:disabled{background:var(--border);cursor:not-allowed}.send-button:active:not(:disabled){transform:scale(.98)}.loading{display:flex;gap:8px;padding:16px 0}.loading-dot{width:8px;height:8px;border-radius:50%;background:var(--text-secondary);animation:bounce 1.4s infinite ease-in-out both}.loading-dot:nth-child(1){animation-delay:-.32s}.loading-dot:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-secondary);text-align:center;padding:48px 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