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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 2rem;
}

.upload-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.upload-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: #3498db;
  color: white;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.3s;
}

.upload-label:hover {
  background: #2980b9;
}

.upload-icon {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.file-input {
  display: none;
}

.lang-select {
  width: 200px;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.translate-btn, .download-btn {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.3s;
}

.translate-btn {
  background: #2ecc71;
  color: white;
}

.translate-btn:hover {
  background: #27ae60;
}

.translate-btn:disabled {
  background: #95a5a6;
  cursor: not-allowed;
}

.download-btn {
  background: #e74c3c;
  color: white;
}

.download-btn:hover {
  background: #c0392b;
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.result-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #eee;
}

.translated-text {
  margin: 1rem 0;
  padding: 1rem;
  background: #f8f9fa;
  border-radius: 4px;
  white-space: pre-wrap;
}

.hidden {
  display: none;
}