/* General page styling */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f8f9fa;
  color: #333;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: #007bff;
  color: white;
}

header h1 {
  margin: 0;
}

.logout-btn {
  background-color: white;
  color: #007bff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
}

.logout-btn:hover {
  background-color: #e0e0e0;
}

/* Login page */
.login-container {
  margin: 120px auto;
  width: 320px;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  text-align: center;
}

.login-container input {
  width: 100%;
  padding: 10px;
  margin: 15px 0;
  border-radius: 5px;
  border: 1px solid #ccc;
}

.login-container button {
  width: 100%;
  background-color: #007bff;
  color: white;
  border: none;
  padding: 10px;
  border-radius: 5px;
  cursor: pointer;
}

.login-container button:hover {
  background-color: #0056b3;
}

/* Gallery grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 15px;
  padding: 20px;
}

.gallery img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.gallery img:hover {
  transform: scale(1.03);
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  z-index: 100;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  justify-content: center;
  align-items: center;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 8px;
  box-shadow: 0 0 20px #000;
  cursor: zoom-out;
}