/* Shared styles for all pages */
body {
  margin: 0;
  margin-left: 125px;
  margin-right: 125px;
  font-family: Arial, sans-serif;
  background: url('background.jpg') no-repeat center center fixed;
  background-size: contain;
  color: black;
}
header {
  background: rgba(0, 0, 0, 0.7);
  text-align: center;
  padding: 15px 0;
}
nav a {
  color: white;
  margin: 0 20px;
  text-decoration: none;
  font-weight: bold;
}
nav a:hover {
  text-decoration: underline;
}
main {
  padding: 10px;
  <!--text-align: center;-->
}
.gallery-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.gallery-img {
  max-width: 80%;
  max-height: 70vh;
  border: 3px solid white;
  border-radius: 10px;
  margin-bottom: 20px;
}

img {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.5);
  color: white;
  border: none;
  padding: 15px 20px;
  cursor: pointer;
  font-size: 24px;
  border-radius: 5px;
}

button:hover {
  background: rgba(255,255,255,0.2);
}

#prev {
  left: 10px;
}

#next {
  right: 10px;
}

.content (
  width: 600px;
}