/* Global Styles */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-secondary: #64748b;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Tool Page Styles */
.tool-container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.tool-header {
  text-align: center;
  margin-bottom: 2rem;
}

.tool-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.tool-header p {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #ecfdf5;
  color: #065f46;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  background: var(--color-surface);
  transition: all 0.2s;
  cursor: pointer;
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--color-primary);
  background: #eff6ff;
}

.upload-area svg {
  width: 48px;
  height: 48px;
  color: var(--color-secondary);
  margin-bottom: 1rem;
}

.upload-area h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.upload-area p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: #f9fafb;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Progress Bar */
.progress-container {
  margin: 1.5rem 0;
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.progress-text {
  text-align: center;
  margin-top: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* File List */
.file-list {
  margin: 1.5rem 0;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
}

.file-info {
  flex: 1;
}

.file-name {
  font-weight: 500;
  margin-bottom: 0.25rem;
  word-break: break-all;
}

.file-size {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.file-actions {
  display: flex;
  gap: 0.5rem;
}

/* Result Area */
.result-area {
  margin-top: 2rem;
  padding: 2rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.result-area h3 {
  margin-top: 0;
}

/* FAQ Section */
.faq-section {
  margin-top: 3rem;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
}

.faq-item h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
}

.faq-item p {
  margin: 0;
  color: var(--color-text-secondary);
}

/* Feedback Buttons */
.feedback-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin: 2rem 0;
}

.feedback-btn {
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
}

.feedback-btn:hover {
  background: #f9fafb;
  border-color: var(--color-primary);
}

.feedback-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Responsive */
@media (max-width: 768px) {
  .tool-container {
    padding: 0 1rem;
  }

  .tool-header h1 {
    font-size: 1.5rem;
  }

  .upload-area {
    padding: 2rem 1rem;
  }

  .file-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .file-actions {
    width: 100%;
  }

  .file-actions .btn {
    flex: 1;
  }
}