/* Variables CSS para consistencia */
:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --success-color: #16a34a;
  --danger-color: #dc2626;
  --warning-color: #d97706;
  --info-color: #0891b2;
  --light-gray: #f8fafc;
  --border-color: #e2e8f0;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-radius: 8px;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Contenedor principal */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--border-radius);
  padding: 15px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.system-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--text-secondary);
}

.user-info {
  font-weight: 500;
  color: var(--text-primary);
}

/* Cards y pantallas */
.screen {
  width: 100%;
}

.card,
.menu-card {
  background: white;
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 20px;
}

.menu-card {
  text-align: center;
  background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
}

/* Títulos */
h1 {
  color: var(--primary-color);
  margin-bottom: 30px;
  font-size: 2em;
  font-weight: 600;
}

h2 {
  color: var(--text-primary);
  margin-bottom: 25px;
  text-align: center;
  font-size: 1.5em;
  font-weight: 600;
}

h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: 1.2em;
  font-weight: 500;
}

/* Formularios */
.form {
  width: 100%;
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 16px;
  transition: border-color 0.3s ease;
  background: white;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* Botones */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  min-width: 120px;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn:active {
  transform: translateY(0);
}

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

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

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

.btn-secondary:hover {
  background-color: #475569;
}

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

.btn-success:hover {
  background-color: #15803d;
}

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

.btn-danger:hover {
  background-color: #b91c1c;
}

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

.btn-warning:hover {
  background-color: #b45309;
}

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

.btn-info:hover {
  background-color: #0e7490;
}

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
  min-width: auto;
}

/* Botones del menú */
.menu-buttons {
  display: grid;
  gap: 15px;
  max-width: 400px;
  margin: 0 auto;
}

.menu-btn {
  width: 100%;
  padding: 15px;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

/* Acciones de formulario */
.form-actions {
  display: flex;
  gap: 15px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.form-actions .btn {
  flex: 1;
  min-width: 140px;
}

/* Upload de fotos */
.photo-upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  padding: 20px;
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--light-gray);
}

.preview-image {
  width: 120px;
  height: 120px;
  border-radius: var(--border-radius);
  object-fit: cover;
  border: 2px solid var(--border-color);
  background-color: white;
}

.file-input {
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: white;
}

/* Carrito */
.cart-header {
  text-align: center;
  margin-bottom: 25px;
}

.btn-cart {
  position: relative;
  background: linear-gradient(
    145deg,
    var(--primary-color),
    var(--primary-hover)
  );
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: 15px 30px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow);
}

.btn-cart:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cart-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: var(--danger-color);
  color: white;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: none;
  font-size: 12px;
  line-height: 24px;
  text-align: center;
  font-weight: bold;
}

/* Búsqueda */
.search-section {
  background-color: var(--light-gray);
  padding: 20px;
  border-radius: var(--border-radius);
  margin-bottom: 25px;
}

.search-bar {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.search-input {
  flex: 1;
  padding: 12px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 16px;
}

/* Artículos */
.articles-section {
  margin-bottom: 25px;
}

.articles-grid {
  display: grid;
  gap: 20px;
}

.article-item {
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  background: linear-gradient(145deg, #ffffff, #f8fafc);
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

.article-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.article-content {
  display: flex;
  gap: 15px;
  align-items: flex-start;
}

.article-image {
  width: 120px;
  height: 120px;
  border-radius: var(--border-radius);
  object-fit: cover;
  border: 2px solid var(--border-color);
  background-color: var(--light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 14px;
  text-align: center;
}

.article-info {
  flex: 1;
}

.article-name {
  font-size: 1.2em;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.article-description {
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-size: 14px;
}

.article-price {
  font-size: 1.1em;
  font-weight: 700;
  color: var(--danger-color);
  margin-bottom: 5px;
}

.article-stock {
  color: var(--text-secondary);
  margin-bottom: 15px;
}

.article-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 15px;
}

.quantity-input {
  width: 70px;
  padding: 8px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  text-align: center;
}

/* Carrito de compras */
.cart-items {
  margin-bottom: 25px;
}

.cart-item {
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 15px;
  background: linear-gradient(145deg, #ffffff, #f8fafc);
  transition: all 0.3s ease;
}

.cart-item:hover {
  box-shadow: var(--shadow);
}

.cart-item-content {
  display: flex;
  align-items: center;
  gap: 15px;
}

.cart-item-image {
  width: 100px;
  height: 100px;
  border-radius: var(--border-radius);
  object-fit: cover;
  border: 2px solid var(--border-color);
  background-color: var(--light-gray);
}

.cart-item-info {
  flex: 1;
}

.cart-item-name {
  font-size: 1.1em;
  font-weight: 600;
  margin-bottom: 10px;
}

.cart-item-details {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.cart-item-quantity {
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.cart-item-price {
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.cart-item-total {
  font-weight: 700;
  color: var(--danger-color);
  font-size: 1.1em;
}

.cart-total {
  text-align: right;
  font-size: 1.5em;
  font-weight: 700;
  color: var(--primary-color);
  margin: 25px 0;
  padding: 15px;
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
}

.cart-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 15px;
  margin-top: 25px;
}

.cart-actions .btn {
  padding: 15px;
  font-weight: 600;
}

/* Estados vacíos */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 15px;
  display: block;
}

.empty-state-message {
  font-size: 18px;
  margin-bottom: 20px;
}

/* Animaciones de carga */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* Notificaciones */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 15px 20px;
  border-radius: var(--border-radius);
  color: white;
  font-weight: 600;
  z-index: 1000;
  transform: translateX(400px);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.notification.show {
  transform: translateX(0);
}

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

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

.notification-info {
  background-color: var(--info-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }

  .card,
  .menu-card {
    padding: 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .form-actions {
    flex-direction: column;
  }

  .form-actions .btn {
    width: 100%;
  }

  .search-bar {
    flex-direction: column;
  }

  .search-input {
    margin-bottom: 10px;
  }

  .article-content {
    flex-direction: column;
    text-align: center;
  }

  .article-image {
    align-self: center;
  }

  .cart-actions {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .cart-item-content {
    flex-direction: column;
    text-align: center;
  }

  .cart-item-details {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .system-info {
    flex-direction: column;
    gap: 5px;
    text-align: center;
  }

  .menu-btn {
    font-size: 16px;
    padding: 12px;
  }
}

@media (max-width: 480px) {
  .btn-cart {
    padding: 12px 20px;
    font-size: 16px;
  }

  .article-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .quantity-input {
    width: 100%;
  }
}

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

@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

.screen {
  animation: fadeIn 0.3s ease;
}

.menu {
  animation: slideIn 0.3s ease;
}

/* Estados de hover mejorados */
.article-item:hover .article-name {
  color: var(--primary-color);
}

.cart-item:hover {
  border-color: var(--primary-color);
}

/* Mejoras de accesibilidad */
.btn:focus,
.form-input:focus,
.form-textarea:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Estilos para botones de eliminar específicos */
.btn-remove {
  background-color: var(--danger-color);
  color: white;
  padding: 8px 12px;
  font-size: 14px;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-remove:hover {
  background-color: #b91c1c;
  transform: translateY(-1px);
}

/* Indicadores de estado */
.status-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
}

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

.status-offline {
  background-color: var(--secondary-color);
}