*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--amber: #f59e0b;--amber-dark: #d97706;--bg: #fafafa;--surface: #ffffff;--border: #e5e7eb;--text: #111827;--muted: #6b7280;--user-bubble: #f59e0b;--bot-bubble: #f3f4f6;--radius: 16px;--tab-h: 56px;--safe-bottom: env(safe-area-inset-bottom, 0px)}html,body,#root{height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);font-size:16px;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;border:none;background:none}input,textarea{font-family:inherit;font-size:inherit}a{color:inherit;text-decoration:none}