:root{color-scheme:dark;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:#0b1222;color:#e2e8f0}body{margin:0}.shell{padding:24px;max-width:100%;margin:0;width:100%;box-sizing:border-box}body{margin:0;padding:0;overflow-x:auto}.card{background:#0f172a;border:1px solid #1f2937;border-radius:12px;padding:16px;margin-bottom:12px}input,textarea,select,button{font-family:inherit}button{background:linear-gradient(135deg,#4f46e5,#06b6d4);color:#fff;border:none;padding:10px 14px;border-radius:10px;cursor:pointer;font-weight:700}