body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #fff;
  color: #333;
}
.container {
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
}
header {
  background-color: #f8f8f8;
  padding: 20px 0;
  border-bottom: 1px solid #ddd;
}
header h1 {
  margin: 0;
  font-size: 24px;
}
nav {
  margin-top: 10px;
}
nav a {
  margin-right: 15px;
  text-decoration: none;
  color: #333;
}
nav a:hover {
  text-decoration: underline;
}
main {
  padding: 20px 0;
}
.before-after {
  margin-bottom: 40px;
}
.before-after h2 {
  margin-bottom: 10px;
}
.pair {
  display: flex;
  gap: 20px;
}
.pair div {
  flex: 1;
  text-align: center;
}
.pair img {
  max-width: 100%;
  height: auto;
  border: 1px solid #ccc;
}
footer {
  background-color: #f8f8f8;
  text-align: center;
  padding: 20px 0;
  margin-top: 40px;
  border-top: 1px solid #ddd;
}