:root{--bg:#f8f9fb;--text:#111827;--card-bg:#fff;--border:#e5e7eb}body{background:var(--bg);color:var(--text);margin:0;font-family:Inter,system-ui,sans-serif;transition:background .3s,color .3s}body.dark{--bg:#0a0a0a;--text:#fafafa;--card-bg:#171717;--border:#262626}html{scroll-behavior:smooth}::selection{background:#ffffff26}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#404040;border-radius:999px}::-webkit-scrollbar-thumb:hover{background:#525252}input::placeholder{color:#737373}