body { font-family: Arial, sans-serif; margin:0; padding:0; background:#f7f7f7; color:#333; }
header { background:#222; color:#fff; padding:1em; text-align:center; }
header h1 { margin:0; }
nav a { color:#fff; margin:0 10px; text-decoration:none; }
main { padding:2em; }
footer { background:#222; color:#fff; text-align:center; padding:1em; position:fixed; width:100%; bottom:0; }
ul { line-height:1.8; }
.gallery { display:grid; grid-template-columns:repeat(auto-fit, minmax(200px,1fr)); gap:10px; }