:root{--bg-primary: #0a0a0a;--bg-secondary: #111111;--bg-tertiary: #1a1a1a;--bg-elevated: #222222;--bg-input: #161616;--bg-hover: #1e1e1e;--accent: #0095f6;--accent-hover: #1aa3ff;--accent-dark: #0077cc;--accent-glow: rgba(0, 149, 246, .15);--accent-gradient: linear-gradient(135deg, #0095f6, #00d4ff);--gradient-warm: linear-gradient(135deg, #f857a6, #ff5858);--gradient-purple: linear-gradient(135deg, #667eea, #764ba2);--text-primary: #f5f5f5;--text-secondary: #a8a8a8;--text-muted: #545454;--text-inverse: #0a0a0a;--border: rgba(255, 255, 255, .08);--border-strong: rgba(255, 255, 255, .15);--border-accent: rgba(0, 149, 246, .3);--bubble-sent: #0095f6;--bubble-sent-text: #ffffff;--bubble-received: #1a1a1a;--bubble-received-text: #f5f5f5;--online: #44b700;--offline: #545454;--error: #ff3b30;--warning: #ffcc00;--success: #34c759;--font-base: "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;--sidebar-width: 360px;--header-height: 64px;--input-height: 64px;--radius-sm: 8px;--radius-md: 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var(--transition-fast);flex-shrink:0}.send-btn:hover{transform:scale(1.05);box-shadow:var(--shadow-glow)}.send-btn:active{transform:scale(.95)}.send-btn svg{color:#fff}.recording-indicator{display:flex;align-items:center;gap:12px;flex:1;padding:8px 16px;background:var(--bg-input);border-radius:var(--radius-xl);border:1px solid var(--error)}.recording-dot{width:10px;height:10px;background:var(--error);border-radius:50%;animation:pulse 1s ease-in-out infinite}.recording-time{font-size:14px;font-weight:500;color:var(--text-primary);font-variant-numeric:tabular-nums}.recording-waveform{flex:1;height:24px;display:flex;align-items:center;gap:2px}.recording-waveform .bar{width:3px;background:var(--accent);border-radius:2px;animation:pulse .5s ease infinite}.typing-indicator{display:flex;align-items:center;gap:6px;padding:4px 0;font-size:13px;color:var(--text-secondary);animation:fadeIn .2s ease}.typing-dots{display:flex;gap:3px}.typing-dots 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