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:root{--bg-primary:#0a0a0f;--bg-secondary:#12121a;--bg-card:#16161f;--bg-elevated:#1c1c28;--bg-hover:#22223a;--accent:#6c5ce7;--accent-light:#a29bfe;--accent-glow:#6c5ce740;--accent-gradient:linear-gradient(135deg, #6c5ce7, #a29bfe);--success:#00cec9;--warning:#fdcb6e;--error:#ff6b6b;--text-primary:#e8e8f0;--text-secondary:#8888a8;--text-muted:#55556a;--border:#2a2a3d;--border-light:#33334a;--radius:12px;--radius-sm:8px;--radius-lg:16px;--shadow:0 4px 24px #0006;--shadow-lg:0 8px 48px #0009;--shadow-glow:0 0 30px var(--accent-glow)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh}.main-container{background:radial-gradient(ellipse at 20% 50%, #6c5ce70f 0%, transparent 60%), radial-gradient(ellipse at 80% 20%, #a29bfe0a 0%, transparent 60%), 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0}.chatbox-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.empty-state{text-align:center;height:100%;color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;animation:.6s fadeInUp;display:flex}.empty-icon{background:var(--bg-elevated);border:1px solid var(--border);width:100px;height:100px;color:var(--accent-light);box-shadow:var(--shadow-glow);border-radius:24px;justify-content:center;align-items:center;margin-bottom:24px;display:flex}.empty-state h2{color:var(--text-primary);margin-bottom:8px;font-size:22px;font-weight:700}.empty-state 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0;display:flex}.typing-indicator span{background:var(--accent-light);border-radius:50%;width:8px;height:8px;animation:1.4s ease-in-out infinite bounce}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}.input-bar-container{background:var(--bg-card);border-top:1px solid var(--border);flex-shrink:0;padding:16px 24px 20px}.input-row{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);align-items:center;gap:10px;padding:6px 8px;transition:border-color .2s,box-shadow .2s;display:flex}.input-row:focus-within{border-color:var(--accent);box-shadow:var(--shadow-glow)}.input-icon-btn{border-radius:var(--radius-sm);width:38px;height:38px;color:var(--text-secondary);cursor:pointer;background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;transition:all .2s;display:flex}.input-icon-btn:hover{background:var(--bg-hover);color:var(--accent-light)}.input-message{color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;padding:8px 4px;font-family:inherit;font-size:14px}.input-message::placeholder{color:var(--text-muted)}.input-send-btn{background:var(--accent-gradient);border-radius:var(--radius-sm);color:#fff;cursor:pointer;border:none;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;transition:all .2s;display:flex}.input-send-btn:hover:not(:disabled){box-shadow:var(--shadow-glow);transform:scale(1.05)}.input-send-btn:disabled{opacity:.5;cursor:not-allowed}.doc-paste-area{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;padding:16px;animation:.3s 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