*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg:#F8FAFC;--surface:#FFFFFF;--border:#E2E8F0;--text:#1E293B;--text-muted:#64748B;--primary:#2563EB;--primary-hover:#1D4ED8;--accent:#10B981;--danger:#EF4444;--radius:12px;--shadow:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04)}body,html{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit;border:none;border-radius:8px;font-size:14px;font-weight:600;padding:10px 20px;transition:background .15s,transform .1s}button:active{transform:scale(.98)}.btn-primary{background:var(--primary);color:white}.btn-primary:hover{background:var(--primary-hover)}.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}