*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary:#fff;--bg-secondary:#f5f5f5;--bg-tertiary:#ebebeb;--text-primary:#1a1a1a;--text-secondary:#666;--text-tertiary:#999;--border:#e0e0e0;--accent:#4f46e5;--accent-hover:#4338ca;--accent-light:#eef2ff;--danger:#dc2626;--success:#16a34a;--warning:#f59e0b;--radius:8px;--shadow:0 1px 3px #00000014}body{background:var(--bg-secondary);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.6}button{cursor:pointer;border-radius:var(--radius);border:none;padding:8px 16px;font-size:13px;font-weight:500;transition:all .15s}button:active{transform:scale(.98)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary)}.btn-secondary:hover{background:#d4d4d4}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#b91c1c}.btn-sm{padding:4px 10px;font-size:12px}input,textarea,select{border:1px solid var(--border);border-radius:var(--radius);outline:none;padding:8px 12px;font-family:inherit;font-size:13px;transition:border-color .15s}input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}a{color:var(--accent);text-decoration:none}