:root{--primary:#1185fe;--primary-dark:#0070e0;--primary-light:#e8f4ff;--bg:#f5f7fa;--card:#fff;--text:#1a1a2e;--text-muted:#687076;--border:#e4e6ea;--success:#13a34a;--warning:#f5a623;--error:#e5484d;--radius:8px;--radius-lg:12px;--shadow:0 1px 3px rgba(0,0,0,.08);--shadow-md:0 4px 12px rgba(0,0,0,.1);--font:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer}button,input{font-family:var(--font)}