body { font-family: Arial, sans-serif; background:#111; color:#eee; margin:0; }
header img.banner { width:100%; display:block; }
nav { background:#222; padding:10px; text-align:center; }
nav a { margin:0 10px; color:#0f0; text-decoration:none; }
h1,h2 { text-align:center; }
.design-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:20px; }
.design-item { text-align:center; padding:10px; }
.design-item img { max-width:100%; border-radius:8px; }
.buy-button { background:#0f0; color:#000; padding:8px 12px; border-radius:5px; text-decoration:none; display:inline-block; margin-top:5px; }
footer { background:#000; padding:20px; text-align:center; }
footer a { margin:0 10px; color:#0f0; text-decoration:none; }