body{font-family:Arial,sans-serif;margin:0;padding:0;background:#fafafa;line-height:1.6}img{max-width:100%;height:auto;object-fit:cover}.header{background:#000;color:#fff;padding:20px;display:flex;justify-content:space-between;align-items:center}.header nav a{margin-left:15px;color:#fff;text-decoration:none;padding:5px 10px}.footer{text-align:center;padding:20px;color:#555;background:#e9e9e9}.main-grid{display:grid;grid-gap:1.5rem;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.two-col-layout{display:flex;gap:2rem;align-items:flex-start}.center-on-mobile{display:flex;justify-content:center}@media (max-width:768px){.header{text-align:left}.header,.header nav{flex-direction:column;align-items:flex-start}.header nav{margin-top:10px;display:flex;width:100%}.header nav a{margin:5px 0;padding:8px 0;width:100%;text-align:left}.main-grid{grid-template-columns:1fr;gap:1rem}.center-on-mobile,.two-col-layout{flex-direction:column;gap:1rem}}