:root {
  --primary-color: #4361ee;
  --secondary-color: #3f37c9;
  --accent-color: #4895ef;
  --light-color: #f8f9fa;
  --dark-color: #212529;
  --success-color: #4bb543;
  --warning-color: #f0ad4e;
  --danger-color: #d9534f;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background-color: #f5f7fa;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 25px;
  margin-bottom: 30px;
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid #eee;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #555;
}

textarea, select, input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

textarea:focus, select:focus, input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(72, 149, 239, 0.2);
}

textarea {
  min-height: 150px;
  resize: vertical;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  color: white;
}

.btn i {
  margin-right: 8px;
}

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

.btn-primary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: #5a6268;
  transform: translateY(-2px);
}

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

.btn-success:hover {
  background-color: #3da735;
  transform: translateY(-2px);
}

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

.btn-danger:hover {
  background-color: #c9302c;
  transform: translateY(-2px);
}

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.barcode-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.barcode-item {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition);
}

.barcode-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.barcode-item.error {
  background-color: #fff8f8;
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
  text-align: center;
}

.barcode-item.error i {
  font-size: 2rem;
  margin-bottom: 10px;
  color: var(--danger-color);
}

.barcode-item.error h3 {
  margin: 10px 0;
}

.barcode-actions {
  display: flex;
  gap: 10px;
  margin-top: 15px;
  width: 100%;
}

.barcode-actions .btn {
  flex: 1;
  padding: 8px 12px;
  font-size: 0.9rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.color-picker {
  display: flex;
  align-items: center;
}

.color-picker input[type="color"] {
  width: 40px;
  height: 40px;
  margin-left: 10px;
  padding: 2px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.file-input {
  position: relative;
  overflow: hidden;
  display: inline-block;
}

.file-input input[type="file"] {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.file-input-label {
  display: flex;
  align-items: center;
  padding: 12px 15px;
  background-color: #e9ecef;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
}

.file-input-label:hover {
  background-color: #dee2e6;
}

.file-input-label i {
  margin-right: 8px;
}

.footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px;
  color: #6c757d;
  font-size: 0.9rem;
}

.logo {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.logo i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-right: 10px;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark-color);
}

.alert-message {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 15px 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  z-index: 1000;
  animation: fadeIn 0.3s ease;
  color: white;
}

.alert-message.success {
  background-color: var(--success-color);
}

.alert-message.warning {
  background-color: var(--warning-color);
}

.alert-message.danger {
  background-color: var(--danger-color);
}

.alert-message.info {
  background-color: var(--primary-color);
}

.alert-message.fade-out {
  animation: fadeOut 0.3s ease;
}

.no-print {
  display: block;
}

@media print {
  .no-print {
    display: none !important;
  }
  
  .barcode-item {
    page-break-inside: avoid;
    break-inside: avoid;
  }
}

@media (max-width: 768px) {
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .settings-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(20px); }
}