* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f9f9f9;
}

header {
  background: #4267B2;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  margin-top: 1rem;
}

nav ul li {
  margin: 0 1rem;
}

nav ul li a {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background 0.3s;
}

nav ul li a:hover,
nav ul li a.active {
  background: rgba(255, 255, 255, 0.2);
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.section {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  margin-bottom: 2rem;
}

h2 {
  margin-bottom: 1.5rem;
  color: #4267B2;
}

button {
  background: #4267B2;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #365899;
}

input[type="password"],
input[type="file"] {
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-right: 0.5rem;
}

/* Instagram-like adjustments */
@media (max-width: 768px) {
  main {
    margin: 0.5rem auto;
    padding: 0;
  }

  .section {
    border-radius: 0;
    box-shadow: none;
    margin-bottom: 0.5rem;
  }

  #gallery-section {
    background: transparent;
    padding: 0;
  }
}