*,:before,:after{box-sizing:border-box}:root{--bg:#0f1117;--surface:#1a1d27;--surface2:#22263a;--border:#2e3347;--text:#e2e8f0;--text-muted:#7a8299;--accent:#6366f1;--accent-hover:#818cf8;--danger:#ef4444;--user-bubble:#6366f1;--assistant-bubble:#1e2236;--font:system-ui, "Segoe UI", Roboto, sans-serif}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font-size:15px;line-height:1.6}#root{flex-direction:column;height:100dvh;display:flex}button{cursor:pointer;font-family:var(--font)}textarea{font-family:var(--font)}.upload-page{flex:1;justify-content:center;align-items:center;padding:24px;display:flex}.upload-card{background:var(--surface);border:1px solid 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