:root{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;font-weight:400;--bg-primary: #111827;--bg-secondary: #1f2937;--bg-tertiary: #374151;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-tertiary: #9ca3af;--border-color: #374151;--accent-primary: #3b82f6;--accent-hover: #2563eb;--accent-light: #60a5fa;--success: #10b981;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .4);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .5);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-color-scheme:light){:root{--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-tertiary: #f3f4f6;--text-primary: #111827;--text-secondary: #4b5563;--text-tertiary: #6b7280;--border-color: #e5e7eb;--accent-primary: #3b82f6;--accent-hover: #2563eb;--accent-light: #60a5fa;--success: #10b981;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1)}}*{box-sizing:border-box}body{margin:0;padding:0;min-width:320px;min-height:100vh;background:var(--bg-primary);color:var(--text-primary)}#root{width:100%;height:100vh}a{font-weight:500;color:var(--accent-color);text-decoration:none}a:hover{color:var(--accent-color-hover)}button{font-family:inherit;font-size:inherit;line-height:inherit}h1,h2,h3,h4,h5,h6,p{margin:0}.chat-container{display:flex;flex-direction:column;height:100vh;background:var(--bg-primary)}.chat-header{padding:1.25rem 1.5rem;border-bottom:1px solid var(--border-color);background:var(--bg-primary);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:center;min-height:60px}.chat-header 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