:root{--bg:#f7fafc;--fg:#0b1b2b;--pri:#0e7490;--sec:#10b981}*{box-sizing:border-box}body,html{padding:0;margin:0;background:var(--bg);color:var(--fg);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif}.container{max-width:1080px;margin:0 auto;padding:24px}.header{display:flex;justify-content:space-between;align-items:center;padding:16px 0}.nav a{margin-left:16px;color:var(--fg);text-decoration:none}.nav a:hover{color:var(--pri)}.btn{display:inline-block;padding:10px 16px;border:1px solid var(--pri);color:white;background:var(--pri);border-radius:8px}.btn.secondary{background:var(--sec);border-color:var(--sec)}.grid{display:grid;grid-template-columns:1fr;grid-gap:16px;gap:16px}@media(min-width:768px){.grid{grid-template-columns:2fr 1fr}}.card{background:white;border-radius:12px;padding:16px;border:1px solid #e5e7eb}.footer{margin-top:48px;padding:24px 0;color:#475569}.mt16{margin-top:16px}.mt8{margin-top:8px}.row{display:flex;align-items:center}.gap12{gap:12px}.error{color:#dc2626}