body {
  margin: 0;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  color: #222;
  background: #fff;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 60px 20px;
}

h1 {
  font-size: 42px;
  margin-bottom: 20px;
}

h2 {
  font-size: 28px;
  margin-bottom: 20px;
}

p {
  font-size: 22px;
  color: #555;
}

.nav {
  display: flex;
  justify-content: space-between;
  padding: 20px;
  background: white;
  border-bottom: 1px solid #eee;
}

.nav a {
  text-decoration: none;
  color: black;
  margin-left: 20px;
}

.hero {
  background: url('https://via.placeholder.com/1600x900') center/cover no-repeat;
  color: white;
  text-align: center;
  padding: 140px 20px;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 14px 28px;
  background: black;
  color: white;
  text-decoration: none;
}

.section-light {
  background: #f7f7f7;
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.gallery img {
  width: 100%;
}

.footer {
  text-align: center;
  padding: 40px;
  background: #111;
  color: white;
}

<style>
.gallery img {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.gallery img.visible {
  opacity: 1;
  transform: translateY(0);
}

.center-text {
  text-align: center;
}

</style>