:root {
  /* Primary colors */
  --color-primary: #667eea;
  --color-primary: rgb(113, 60, 92);
  --color-primary-dark: #764ba2;
  --color-primary-dark: rgb(180, 18, 34);
  
  /* Text colors */
  --color-text-dark: #333;
  --color-text-medium: #666;
  
  /* Background colors */
  --color-bg-white: white;
  --color-bg-light: #f8f9ff;
  --color-bg-light-hover: #f0f1ff;
  --color-bg-light-active: #e8e9ff;
  
  /* Status colors */
  --color-success-bg: #d4edda;
  --color-success-text: #155724;
  --color-error-bg: #f8d7da;
  --color-error-text: #721c24;
  --color-loading-bg: #d1ecf1;
  --color-loading-text: #0c5460;
  
  /* Shadow colors */
  --shadow-light: rgba(0, 0, 0, 0.1);
  --spinner-border: rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  background-image: url('background.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.container {
  background: var(--color-bg-white);
  border-radius: 12px;
  box-shadow: 0 10px 40px var(--shadow-light);
  padding: 40px;
  max-width: 600px;
  width: 100%;
  position: relative;
}

.language-switcher {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  gap: 5px;
}

.lang-btn {
  background: var(--color-bg-light);
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  background: var(--color-bg-light-hover);
}

.lang-btn.active {
  background: var(--color-primary);
  color: var(--color-bg-white);
}

h1 {
  color: var(--color-text-dark);
  margin-bottom: 10px;
  font-size: 28px;
}

.details {
  color: var(--color-text-medium);
  margin-bottom: 30px;
  font-size: 14px;
}

.upload-area {
  border: 2px dashed var(--color-primary);
  border-radius: 8px;
  padding: 40px;
  text-align: center;
  background: var(--color-bg-light);
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 20px;
}

.upload-area:hover {
  border-color: var(--color-primary-dark);
  background: var(--color-bg-light-hover);
}

.upload-area.dragover {
  border-color: var(--color-primary-dark);
  background: var(--color-bg-light-active);
}

.upload-icon {
  font-size: 48px;
  margin-bottom: 10px;
}

.file-input {
  display: none;
}

.file-info {
  margin: 20px 0;
  padding: 15px;
  background: var(--color-bg-light);
  border-radius: 6px;
  display: none;
}

.file-info.show {
  display: block;
}

.file-name {
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: 5px;
}

.file-size {
  color: var(--color-text-medium);
  font-size: 14px;
}

.btn {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-bg-white);
  border: none;
  padding: 12px 30px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease;
  width: 100%;
  margin-top: 10px;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.status {
  margin-top: 20px;
  padding: 15px;
  border-radius: 6px;
  display: none;
}

.status.show {
  display: block;
}

.status.success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
}

.status.error {
  background: var(--color-error-bg);
  color: var(--color-error-text);
}

.status.loading {
  background: var(--color-loading-bg);
  color: var(--color-loading-text);
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 3px solid var(--spinner-border);
  border-radius: 50%;
  border-top-color: var(--color-loading-text);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.download-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}

.download-link:hover {
  text-decoration: underline;
}