body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
  background: #f44336;
  color: white;
  padding: 20px;
}

nav {
  margin: 20px 0;
}

button {
  margin: 5px;
  padding: 10px 20px;
  background-color: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 5px;
}

button:hover {
  background-color: #45a049;
}

.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  padding: 20px;
}

.gallery img {
  max-width: 200px;
  border-radius: 10px;
}

.popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-30%, -30%);
  width: auto;
  max-width: 420px;
  background: #ffffff;
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  text-align: center;
  font-family: 'Segoe UI', sans-serif;
}

.popup-content h2 {
  font-size: 18px;
  margin: 0 0 8px;
  color: #222;
}

.popup-content p {
  font-size: 14px;
  margin: 0 0 16px;
  color: #555;
}

.download-btn {
  background-color: #0f9d58;
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.3s ease;
}

.download-btn:hover {
  background-color: #0b7e45;
}

.close-btn {
  margin-top: 10px;
  background: none;
  border: none;
  color: #999;
  font-size: 13px;
  cursor: pointer;
}

.close-btn:hover {
  color: #333;
}


nav button .icon {
  width: 16px;
  height: 16px;
}