:root{--background: #0d0d0f;--surface: #18181b;--border: #27272a;--text-primary: #fafafa;--text-secondary: #a1a1aa;--text-muted: #52525b;--accent: #ef4444;--user-bubble: #2563eb;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.5rem;--space-6: 2rem;--space-8: 3rem;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .4s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;-webkit-tap-highlight-color:transparent}html,body{height:100%}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:var(--text-base);line-height:1.6;background-color:var(--background);color:var(--text-primary);overscroll-behavior:none}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#3f3f46}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.85;transform:scale(.98)}}.animate-pulse{animation:pulse 2s ease-in-out infinite}@keyframes entrance{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.animate-entrance{animation:entrance .4s ease-out forwards}@keyframes send-ripple{0%{transform:scale(1)}50%{transform:scale(.97)}to{transform:scale(1)}}.animate-send{animation:send-ripple .15s ease-out}.text-xs{font-size:var(--text-xs)}.text-sm{font-size:var(--text-sm)}.text-base{font-size:var(--text-base)}.text-lg{font-size:var(--text-lg)}.text-xl{font-size:var(--text-xl)}.font-medium{font-weight:500}.font-semibold{font-weight:600}.text-secondary{color:var(--text-secondary)}.text-muted{color:var(--text-muted)}.text-accent{color:var(--accent)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button:focus-visible,textarea:focus-visible,input:focus-visible{outline:none;box-shadow:0 0 0 2px var(--background),0 0 0 4px var(--accent)}::selection{background:#ef44444d;color:var(--text-primary)}a{color:var(--text-primary);text-decoration:underline;text-decoration-color:var(--border);text-underline-offset:2px;transition:text-decoration-color var(--transition-fast)}a:hover{text-decoration-color:var(--text-secondary)}button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit}button:disabled{cursor:not-allowed;opacity:.5}