:root{color:#1f2937;font-family:IBM Plex Sans,Noto Sans,sans-serif;line-height:1.5;background:linear-gradient(160deg,#f4f7fb,#edf6ff)}body{margin:0}.shell{margin:0 auto;max-width:960px;padding:1rem}header{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}nav{display:flex;gap:.75rem}main{margin-top:1rem;background:#fff;border-radius:12px;padding:1rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.75rem}.card{border:1px solid #dbe6f4;border-radius:10px;padding:.75rem}