body { background-color: black; color: white; font-family: sans-serif; margin:0; }
h1 { font-size: 2rem; font-weight: bold; text-align:center; margin-top:1rem; }
h2 { font-size: 1.5rem; margin-top: 1rem; }
nav { display:flex; justify-content:center; gap:1rem; margin: 1rem; }
button { padding:0.5rem 1rem; border:1px solid white; background:black; color:white; cursor:pointer; }
button.active { background:white; color:black; }
.grid { display:grid; grid-template-columns:1fr 1fr; gap:1rem; padding:1rem; }
img { width:100%; border-radius:0.5rem; }
section { padding:1rem; max-width:800px; margin:0 auto; }
footer { text-align:center; color:gray; padding:1rem; }