/* CSS Variables - Carbon Tech Dark Theme System */
:root {
  --bg-color: #08090c;
  --panel-bg: rgba(18, 20, 26, 0.75);
  --panel-bg-hover: rgba(26, 29, 38, 0.85);
  --panel-border: rgba(255, 255, 255, 0.05);
  --panel-border-focus: rgba(61, 196, 92, 0.4);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-subtle: #6b7280;
  
  --accent-orange: rgb(61, 196, 92);
  --accent-orange-hover: rgb(81, 216, 112);
  --accent-orange-glow: rgba(61, 196, 92, 0.25);
  
  --accent-cyan: #00e5ff;
  --accent-purple: #a855f7;
  --accent-green: #22c55e;
  --accent-green-hover: #4ade80;
  --accent-red: #ef4444;
  --accent-red-hover: #f87171;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', "Courier New", Courier, monospace;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 18px;
  --border-radius-xl: 26px;
  
  --blur-amount: 14px;
}

/* Reset y Estilos Generales */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  background-image: 
    radial-gradient(at 10% 20%, rgba(61, 196, 92, 0.05) 0px, transparent 50%),
    radial-gradient(at 90% 80%, rgba(0, 229, 255, 0.03) 0px, transparent 50%);
  background-attachment: fixed;
}

/* Header Principal */
.main-header {
  background-color: rgba(8, 9, 12, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--panel-border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-3d {
  color: var(--accent-orange);
  filter: drop-shadow(0 0 8px var(--accent-orange-glow));
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.header-logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge-version {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background-color: rgba(61, 196, 92, 0.15);
  color: var(--accent-orange);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  border: 1px solid rgba(61, 196, 92, 0.2);
}

/* Barra de Pestañas */
.nav-tabs {
  display: flex;
  gap: 0.5rem;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
  color: var(--accent-orange);
  background-color: rgba(61, 196, 92, 0.08);
  border-color: rgba(61, 196, 92, 0.25);
  box-shadow: 0 0 15px rgba(61, 196, 92, 0.05);
}

.tab-icon {
  transition: transform var(--transition-fast);
}

.tab-btn:hover .tab-icon {
  transform: scale(1.08);
}

/* Contenedor Principal */
.container {
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  flex: 1;
}

/* Pestañas de Contenido */
.tab-content {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Tarjetas (Paneles) */
.card {
  background-color: var(--panel-bg);
  backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--panel-border);
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.4);
}

.card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: -0.015em;
  position: relative;
  padding-left: 0.75rem;
}

.card h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15%;
  height: 70%;
  width: 3px;
  background-color: var(--accent-orange);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-orange-glow);
}

/* Rejilla de la Calculadora */
.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.75rem;
  margin-bottom: 1.75rem;
}

.calc-left, .calc-right {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* Elementos de Formulario (Inputs) */
.input-group {
  margin-bottom: 1.25rem;
}

.input-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.input-group input,
.input-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--panel-border);
  background-color: rgba(8, 9, 12, 0.5);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 16px; /* Evita zoom automático en iOS */
  transition: var(--transition-fast);
}

.input-group input:hover,
.input-group select:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background-color: rgba(8, 9, 12, 0.7);
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--accent-orange);
  background-color: rgba(8, 9, 12, 0.9);
  box-shadow: 0 0 12px rgba(61, 196, 92, 0.15);
}

/* Inputs deshabilitados (Outputs en campos de texto) */
.input-group input:disabled,
.output-field[readonly] {
  background-color: rgba(8, 9, 12, 0.25);
  border-color: rgba(255, 255, 255, 0.02);
  color: var(--text-main);
  font-weight: 600;
  cursor: default;
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Botones */
.btn {
  width: 100%;
  padding: 0.85rem 1.5rem;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid transparent;
  transition: var(--transition-fast);
}

.btn-icon {
  flex-shrink: 0;
}

.btn-primary {
  background-color: var(--accent-orange);
  color: #fff;
  box-shadow: 0 4px 15px rgba(61, 196, 92, 0.2);
}

.btn-primary:hover {
  background-color: var(--accent-orange-hover);
  box-shadow: 0 6px 20px rgba(61, 196, 92, 0.35);
  transform: translateY(-1px);
}

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

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border-color: var(--panel-border);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-success {
  background-color: var(--accent-green);
  color: #fff;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.2);
}

.btn-success:hover {
  background-color: var(--accent-green-hover);
  box-shadow: 0 6px 18px rgba(34, 197, 94, 0.35);
  transform: translateY(-1px);
}

.btn-danger {
  background-color: var(--accent-red);
  color: #fff;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background-color: var(--accent-red-hover);
  box-shadow: 0 6px 18px rgba(239, 68, 68, 0.35);
  transform: translateY(-1px);
}

.btn-group {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* Acordeón (Collapse Container) */
.collapse-container {
  overflow: hidden;
}

.collapse-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.collapse-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
}

.collapse-arrow {
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.collapse-container.expanded .collapse-arrow {
  transform: rotate(180deg);
  color: var(--accent-orange);
}

.collapse-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease-out, margin-top var(--transition-normal);
  margin-top: 0;
}

.collapse-container.expanded .collapse-body {
  max-height: 300px;
  margin-top: 1.5rem;
}

/* Contenedor de Costos (Derecha) */
.costs-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
  align-items: center;
}

.costs-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cost-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.cost-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
}

.dot-legend {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.output-field {
  background: transparent !important;
  border: none !important;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main) !important;
  width: 100px;
  padding: 0 !important;
}

.electricity-sub {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.output-field-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-subtle);
  background: transparent !important;
  border: none !important;
  text-align: right;
  width: 90px;
  margin-bottom: -2px;
}

.divider {
  border: none;
  border-top: 1px solid var(--panel-border);
  margin: 0.5rem 0;
}

.total-row {
  font-size: 1rem;
  margin-top: 0.25rem;
}

.total-row .cost-label {
  font-weight: 700;
  color: var(--text-main);
}

.total-val {
  font-size: 1.25rem !important;
  color: var(--accent-orange) !important;
  text-shadow: 0 0 10px rgba(61, 196, 92, 0.2);
  width: 120px;
}

/* Gráfico de Dona */
.chart-box {
  display: flex;
  justify-content: center;
  align-items: center;
}

.donut-chart {
  width: 100%;
  max-width: 170px;
  height: auto;
  filter: drop-shadow(0 4px 15px rgba(0,0,0,0.4));
}

.donut-chart circle {
  transition: stroke-dashoffset var(--transition-normal);
}

.chart-text-lbl {
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.1em;
  fill: var(--text-subtle);
}

.chart-text-val {
  font-size: 12px;
  font-weight: 800;
  font-family: var(--font-mono);
  fill: var(--text-main);
}

/* Sección Precios de Venta */
.panel-precio-final {
  margin-top: 1.75rem;
}

.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.pricing-card {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-normal);
  overflow: hidden;
}

.pricing-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.08);
}

.badge-card {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-subtle);
  background-color: rgba(255, 255, 255, 0.04);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--panel-border);
}

.pricing-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.price-val {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.ganancia-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-subtle);
  border-top: 1px solid rgba(255,255,255,0.03);
  padding-top: 0.5rem;
}

.ganancia-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-muted);
}

/* Tarjeta Personalizada (Featured) */
.pricing-card.featured {
  background: radial-gradient(circle at 100% 0%, rgba(61, 196, 92, 0.08) 0%, transparent 60%), rgba(61, 196, 92, 0.02);
  border-color: rgba(61, 196, 92, 0.2);
  box-shadow: 0 8px 24px rgba(61, 196, 92, 0.04);
}

.pricing-card.featured:hover {
  border-color: rgba(61, 196, 92, 0.4);
}

.pricing-card.featured h3 {
  color: var(--accent-orange);
}

.price-val.highlight {
  color: var(--accent-orange);
  text-shadow: 0 0 15px var(--accent-orange-glow);
}

.ganancia-val.highlight-g {
  color: var(--accent-green);
}

.select-multiplier {
  color: var(--accent-orange) !important;
  background-color: rgba(61, 196, 92, 0.1) !important;
  border-color: rgba(61, 196, 92, 0.2) !important;
}

/* Rango Slider Personalizado */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  margin: 0.75rem 0 1.25rem 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-orange);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-orange);
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.action-footer {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.5rem;
  border-top: 1px solid var(--panel-border);
  padding-top: 1.5rem;
}

.action-footer .btn {
  width: auto;
  min-width: 200px;
}

/* Vistas de Pestañas con Sidebar + Main Layout */
.tab-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 1.75rem;
}

.tab-sidebar {
  display: flex;
  flex-direction: column;
}

.tab-main {
  min-width: 0; /* Evita que la tabla rompa el contenedor */
}

/* Tablas */
.table-container {
  overflow-x: auto;
  margin-top: 0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th {
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 1rem 0.75rem;
  border-bottom: 2px solid var(--panel-border);
}

td {
  padding: 1rem 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-main);
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.015);
}

td.mono, .mono-cell {
  font-family: var(--font-mono);
  font-weight: 500;
}

.actions-col {
  text-align: right;
  padding-right: 1.5rem;
}

.actions-cell {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* Botones de acción pequeños */
.btn-action {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-muted);
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-action:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

.btn-action.btn-action-edit:hover {
  color: var(--accent-cyan);
  border-color: rgba(0, 229, 255, 0.3);
  background-color: rgba(0, 229, 255, 0.05);
}

.btn-action.btn-action-delete:hover {
  color: var(--accent-red);
  border-color: rgba(239, 68, 68, 0.3);
  background-color: rgba(239, 68, 68, 0.05);
}

.btn-action.btn-action-load:hover {
  color: var(--accent-orange);
  border-color: rgba(255, 107, 0, 0.3);
  background-color: rgba(255, 107, 0, 0.05);
}

/* Pestaña Historial */
.card-historial {
  width: 100%;
}

.card-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.card-header-flex h2 {
  margin-bottom: 0;
}

.action-buttons-header {
  display: flex;
  gap: 0.75rem;
}

.action-buttons-header .btn {
  width: auto;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Footer Principal */
.main-footer {
  border-top: 1px solid var(--panel-border);
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-subtle);
  background-color: rgba(8, 9, 12, 0.4);
}

/* Estado Vacío de Tablas */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-subtle);
}

.empty-state-icon {
  margin-bottom: 1rem;
  color: var(--text-subtle);
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.95rem;
  font-weight: 500;
}

/* Responsividad General y Optimización Mobile (Android & iOS) */
@media (max-width: 1024px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .tab-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    align-items: center;
  }
  
  .nav-tabs {
    width: 100%;
    overflow-x: auto;
    display: flex;
    gap: 0.5rem;
    padding: 0.25rem 0.5rem 0.5rem 0.5rem;
    -webkit-overflow-scrolling: touch; /* Desplazamiento inercial en iOS */
    scrollbar-width: none; /* Firefox */
  }
  
  .nav-tabs::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
  }
  
  .tab-btn {
    flex: 0 0 auto;
    font-size: 0.85rem;
    padding: 0.5rem 0.75rem;
  }

  .container {
    padding: 1.25rem 1rem;
  }
  
  .pricing-cards-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .card-header-flex {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .action-buttons-header {
    width: 100%;
    display: flex;
    gap: 0.5rem;
  }
  
  .action-buttons-header .btn {
    flex: 1;
    font-size: 0.8rem;
    padding: 0.6rem 0.75rem;
  }
  
  .costs-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .costs-list {
    width: 100%;
  }

  .cost-item {
    padding: 0.25rem 0;
  }

  .electricity-sub {
    align-items: flex-end;
  }
  
  .chart-box {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
  }

  .donut-chart {
    max-width: 150px;
  }
}

/* Transformación de tablas a tarjetas (Mobile View < 700px) */
@media (max-width: 700px) {
  table thead {
    display: none; /* Esconder cabeceras */
  }
  
  table, tbody, tr, td {
    display: block;
    width: 100%;
  }
  
  tr {
    background-color: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--panel-border);
    border-radius: var(--border-radius-md);
    margin-bottom: 1.25rem;
    padding: 0.75rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  }
  
  tr:last-child {
    margin-bottom: 0;
  }
  
  td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: right;
    padding: 0.6rem 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 0.85rem;
  }
  
  td:last-child {
    border-bottom: none;
  }
  
  td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-muted);
    text-align: left;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    margin-right: 1rem;
  }
  
  td.actions-col {
    justify-content: flex-end;
    border-bottom: none;
    padding-top: 0.75rem;
  }
  
  .actions-cell {
    width: 100%;
    justify-content: flex-end;
    gap: 0.75rem;
  }
  
  .btn-action {
    padding: 0.5rem 0.75rem;
    flex: 1;
    max-width: 120px;
    height: 38px;
  }
}

/* Pantallas Extra Pequeñas (Mobile S/M/L < 480px) */
@media (max-width: 480px) {
  .container {
    padding: 0.75rem;
  }
  
  .card {
    padding: 1.25rem 1rem;
    border-radius: var(--border-radius-md);
  }
  
  .grid-2col {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .main-header h1 {
    font-size: 1.1rem;
  }
  
  .chart-box {
    max-width: 130px;
    margin: 1rem auto 0 auto;
  }
  
  .donut-chart {
    max-width: 130px;
  }

  .total-val {
    font-size: 1.15rem !important;
  }

  .price-val {
    font-size: 1.5rem;
  }
}