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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: #f5f5f5;
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  color: #333;
  margin-bottom: 30px;
}

.hidden {
  display: none !important;
}

/* Login Section */
.login-card {
  background: white;
  border-radius: 8px;
  padding: 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.login-card h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  color: #555;
}

.form-group input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

.form-group input:focus {
  outline: none;
  border-color: #007bff;
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-primary {
  background: #007bff;
  color: white;
  width: 100%;
}

.btn-primary:hover {
  background: #0056b3;
}

.btn-primary:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.btn-secondary {
  background: #6c757d;
  color: white;
}

.btn-secondary:hover {
  background: #545b62;
}

.btn-secondary:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.error-message {
  color: #dc3545;
  font-size: 14px;
  margin-top: 10px;
  text-align: center;
}

/* Upload Section */
.upload-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.upload-header h2 {
  color: #333;
}

#logout-btn {
  padding: 8px 16px;
  font-size: 14px;
}

.drop-zone {
  background: white;
  border: 2px dashed #ccc;
  border-radius: 8px;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: #007bff;
  background: #f0f7ff;
}

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

.drop-zone-text {
  color: #666;
  margin-bottom: 5px;
}

.drop-zone-hint {
  color: #999;
  font-size: 14px;
}

/* File List */
.file-list-container {
  margin-top: 20px;
}

.file-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.file-list-header h3 {
  color: #333;
}

.file-actions {
  display: flex;
  gap: 10px;
}

.file-actions .btn {
  padding: 8px 16px;
  font-size: 14px;
}

.file-list {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.file-item {
  display: flex;
  align-items: center;
  padding: 12px 15px;
  border-bottom: 1px solid #eee;
}

.file-item:last-child {
  border-bottom: none;
}

.file-info {
  flex: 1;
  min-width: 0;
}

.file-name {
  display: block;
  font-weight: 500;
  color: #333;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-size {
  font-size: 12px;
  color: #999;
}

.file-status {
  width: 140px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 10px;
}

.status-text {
  font-size: 13px;
  color: #666;
}

.status-text.success {
  color: #28a745;
}

.status-text.error {
  color: #dc3545;
  max-width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: #e9ecef;
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: #007bff;
  transition: width 0.1s;
}

.progress-text {
  font-size: 12px;
  color: #666;
  min-width: 35px;
  text-align: right;
}

.remove-btn {
  width: 24px;
  height: 24px;
  border: none;
  background: #f8f9fa;
  color: #666;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}

.remove-btn:hover {
  background: #dc3545;
  color: white;
}

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

/* Results Summary */
.results-summary {
  margin-top: 15px;
  padding: 12px 15px;
  border-radius: 4px;
  text-align: center;
}

.results-summary.all-success {
  background: #d4edda;
  color: #155724;
}

.results-summary.has-errors {
  background: #fff3cd;
  color: #856404;
}

/* Empty State */
.empty-state {
  padding: 20px;
  text-align: center;
  color: #999;
}