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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

header {
  text-align: center;
  color: white;
  margin-bottom: 40px;
  padding: 40px 20px;
}

header h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 10px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
}

.upload-section {
  background: white;
  border-radius: 16px;
  padding: 30px;
  margin-bottom: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

#uploadForm {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  align-items: center;
}

.file-input-wrapper {
  flex: 1;
  min-width: 250px;
}

input[type="file"] {
  display: none;
}

.file-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 20px;
  background: #f7fafc;
  border: 2px dashed #cbd5e0;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  color: #4a5568;
  font-weight: 500;
}

.file-label:hover {
  background: #edf2f7;
  border-color: #667eea;
}

.file-label svg {
  flex-shrink: 0;
}

.upload-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 15px 30px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.upload-btn:active {
  transform: translateY(0);
}

.upload-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.status-message {
  margin-top: 15px;
  padding: 12px 16px;
  border-radius: 8px;
  font-weight: 500;
  display: none;
}

.status-message.success {
  background: #c6f6d5;
  color: #22543d;
  border: 1px solid #9ae6b4;
  display: block;
}

.status-message.error {
  background: #fed7d7;
  color: #742a2a;
  border: 1px solid #fc8181;
  display: block;
}

.gallery-section {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.gallery-section h2 {
  font-size: 2rem;
  margin-bottom: 25px;
  color: #2d3748;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.photo-card {
  background: #f7fafc;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.photo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.photo-card img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  display: block;
}

.photo-info {
  padding: 15px;
}

.photo-filename {
  font-weight: 600;
  color: #2d3748;
  margin-bottom: 5px;
  word-break: break-word;
}

.photo-date {
  font-size: 0.875rem;
  color: #718096;
}

.loading {
  text-align: center;
  padding: 40px;
  color: #718096;
  font-size: 1.1rem;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: #718096;
}

.empty-state svg {
  margin: 0 auto 20px;
  opacity: 0.3;
}

.empty-state h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  color: #4a5568;
}

.empty-state p {
  font-size: 1rem;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  #uploadForm {
    flex-direction: column;
  }

  .file-input-wrapper {
    width: 100%;
  }

  .upload-btn {
    width: 100%;
    justify-content: center;
  }

  .photo-grid {
    grid-template-columns: 1fr;
  }
}