:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-glass: rgba(30, 41, 59, .7);--accent-primary: #3b82f6;--accent-secondary: #8b5cf6;--accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--border-color: rgba(148, 163, 184, .1);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .1);--shadow-md: 0 4px 16px rgba(0, 0, 0, .2);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .3);--light-bg-primary: #f8fafc;--light-bg-secondary: #ffffff;--light-bg-tertiary: #f1f5f9;--light-text-primary: #0f172a;--light-text-secondary: #475569;--light-border: rgba(15, 23, 42, .1);--transition-smooth: all .3s cubic-bezier(.4, 0, .2, 1);--transition-fast: all .15s ease}[data-theme=light]{--bg-primary: var(--light-bg-primary);--bg-secondary: var(--light-bg-secondary);--bg-tertiary: var(--light-bg-tertiary);--bg-glass: rgba(255, 255, 255, .7);--text-primary: var(--light-text-primary);--text-secondary: var(--light-text-secondary);--text-muted: #64748b;--border-color: var(--light-border);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .05);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .12)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:var(--transition-smooth);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.glass{background:var(--bg-glass);backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);border:1px solid var(--border-color);border-radius:16px;box-shadow:var(--shadow-md)}.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#475569}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{transform:translate(-20px);opacity:0}to{transform:translate(0);opacity:1}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{to{transform:rotate(360deg)}}.fade-in{animation:fadeIn .4s ease-out}.slide-in{animation:slideIn .4s ease-out}.container{max-width:1200px;margin:0 auto;padding:0 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#667eea4d}.avatar-assistant{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff;box-shadow:0 4px 12px #f093fb4d}.message-content{flex:1;display:flex;flex-direction:column;gap:.5rem;min-width:0}.message-header{display:flex;align-items:center;gap:.5rem;font-size:.875rem}.message-role{font-weight:600;color:var(--text-primary)}.message-time{color:var(--text-muted);font-size:.75rem}.message-bubble{position:relative;padding:1rem 1.25rem;border-radius:12px;transition:var(--transition-fast)}.bubble-user{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;margin-left:auto;max-width:80%;box-shadow:0 4px 12px #667eea33}.bubble-assistant{background:var(--bg-glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-color);color:var(--text-primary);box-shadow:var(--shadow-sm);max-width:100%}.message-text{margin:0;line-height:1.6;word-wrap:break-word}.markdown-content{line-height:1.7}.markdown-content p{margin:.5rem 0}.markdown-content p:first-child{margin-top:0}.markdown-content p:last-child{margin-bottom:0}.markdown-content strong{color:var(--accent-primary);font-weight:600}.markdown-content ul,.markdown-content ol{margin:.75rem 0;padding-left:1.5rem}.markdown-content li{margin:.25rem 0}.markdown-content code{background:var(--bg-tertiary);padding:.125rem .375rem;border-radius:4px;font-size:.875em;font-family:Courier New,monospace}.markdown-content pre{background:var(--bg-tertiary);padding:1rem;border-radius:8px;overflow-x:auto;margin:.75rem 0}.markdown-content pre code{background:none;padding:0}.copy-button{position:absolute;top:.5rem;right:.5rem;background:var(--bg-secondary);color:var(--text-secondary);padding:.375rem;border-radius:6px;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition-fast)}.message-bubble:hover 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1.5rem;border-bottom:1px solid var(--border-color)}.header-content{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.header-left{display:flex;align-items:center;gap:1rem}.logo{width:48px;height:48px;background:var(--accent-gradient);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 4px 16px #667eea4d}.logo-icon{animation:pulse 2s ease-in-out infinite}.header-text{display:flex;flex-direction:column;gap:.125rem}.header-title{font-size:1.5rem;font-weight:700;margin:0;line-height:1.2}.header-subtitle{font-size:.875rem;color:var(--text-muted);margin:0}.theme-toggle{width:40px;height:40px;border-radius:10px;background:var(--bg-secondary);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;transition:var(--transition-fast)}.theme-toggle:hover{background:var(--bg-tertiary);color:var(--text-primary);transform:scale(1.05)}.messages-area{flex:1;overflow-y:auto;overflow-x:hidden;padding:1.5rem 0;scroll-behavior:smooth}.messages-container{display:flex;flex-direction:column;gap:1rem;padding-bottom:1rem}.loading-indicator{display:flex;align-items:center;gap:1rem;max-width:900px;margin:0 auto;padding:0 1rem}.typing-dots{background:var(--bg-glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-color);padding:1rem 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