/* Google Fonts: Outfit - Fuente limpia, moderna y altamente legible */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;800&display=swap');

:root {
  /* Paleta de colores de alto contraste */
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  
  /* Azul Corporativo/Accesible */
  --color-primary: #1e3a8a; /* Azul marino profundo */
  --color-primary-light: #2b6cb0;
  --color-primary-active: #1a365d;
  
  /* Acentos de estado */
  --color-success: #2f855a; /* Verde bosque accesible */
  --color-success-light: #48bb78;
  --color-success-active: #22543d;
  
  --color-card: #2b6cb0;
  --color-card-active: #2c5282;
  
  --color-border: #cbd5e0;
  --color-shadow: rgba(0, 0, 0, 0.15);
  
  /* Fuentes grandes para adultos mayores */
  --font-base: 20px;
  --font-large: 24px;
  --font-huge: 32px;
  --font-giant: 40px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Outfit', sans-serif;
  user-select: none; /* Prevenir selecciones accidentales al presionar botones rápidamente */
  -webkit-user-select: none;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-base);
  line-height: 1.5;
  min-height: 100vh;
  padding-bottom: 50px;
}

/* NAVBAR Y NAVEGACIÓN */
header {
  background-color: var(--color-primary);
  color: white;
  padding: 15px 20px;
  box-shadow: 0 4px 6px var(--color-shadow);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 15px;
}

.logo-icon {
  width: 48px;
  height: 48px;
}

h1 {
  font-size: var(--font-large);
  font-weight: 800;
  letter-spacing: 0.5px;
}

.nav-tabs {
  display: flex;
  gap: 15px;
}

.tab-btn {
  background: rgba(255, 255, 255, 0.15);
  border: 2px solid transparent;
  color: white;
  padding: 12px 24px;
  font-size: var(--font-large);
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.25);
}

.tab-btn.active {
  background: white;
  color: var(--color-primary);
  border-color: white;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* CONTENEDOR PRINCIPAL */
main {
  max-width: 1400px;
  margin: 20px auto;
  padding: 0 20px;
}

.view-section {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* DISPOSICIÓN EN DOS COLUMNAS PARA MODO CAPTURA EN TABLET/PC */
.captura-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
}

@media (min-width: 1024px) {
  .captura-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.card {
  background: var(--bg-secondary);
  border-radius: 20px;
  padding: 25px;
  box-shadow: 0 8px 16px var(--color-shadow);
  border: 1px solid rgba(0,0,0,0.05);
}

.card-title {
  font-size: var(--font-large);
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--color-primary);
  border-bottom: 3px solid var(--bg-primary);
  padding-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* GRUPOS DE FORMULARIO */
.form-group {
  margin-bottom: 25px;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 10px;
  font-size: var(--font-large);
  color: var(--text-primary);
}

.input-giant {
  width: 100%;
  padding: 15px 20px;
  font-size: var(--font-huge);
  font-weight: 600;
  border: 3px solid var(--color-border);
  border-radius: 15px;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  text-align: right;
  transition: border-color 0.2s;
}

.input-giant:focus {
  outline: none;
  border-color: var(--color-primary-light);
  background-color: white;
}

/* BOTONES GIGANTES DE CATEGORÍA */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 15px;
}

.category-btn {
  background-color: var(--bg-primary);
  border: 3px solid var(--color-border);
  border-radius: 18px;
  padding: 20px 15px;
  font-size: var(--font-large);
  font-weight: 800;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 110px;
  text-align: center;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.category-btn:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}

.category-btn:active {
  transform: translateY(1px);
}

.category-btn.selected {
  background-color: var(--color-primary-light);
  color: white;
  border-color: var(--color-primary);
  box-shadow: 0 8px 15px rgba(43, 108, 176, 0.4);
  transform: scale(1.02);
}

.category-btn .icon {
  font-size: 32px;
}

/* BOTONES GIGANTES TIPO DE PAGO */
.payment-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.payment-btn {
  background-color: var(--bg-primary);
  border: 3px solid var(--color-border);
  border-radius: 18px;
  padding: 20px;
  font-size: var(--font-large);
  font-weight: 800;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  min-height: 85px;
}

.payment-btn.selected {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary-active);
  box-shadow: 0 6px 12px rgba(30, 58, 138, 0.3);
}

.payment-btn.selected.cash-style {
  background-color: var(--color-success);
  border-color: var(--color-success-active);
  box-shadow: 0 6px 12px rgba(47, 133, 90, 0.3);
}

/* CONTENEDOR DE IMPUESTOS Y CÁLCULOS */
.tax-breakdown {
  background-color: #ebf8ff;
  border: 2px solid #bee3f8;
  border-radius: 15px;
  padding: 20px;
  margin-bottom: 25px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tax-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-large);
  color: #2b6cb0;
}

.tax-row.total-row {
  font-size: var(--font-huge);
  font-weight: 800;
  color: var(--color-primary);
  border-top: 2px dashed #bee3f8;
  padding-top: 10px;
  margin-top: 5px;
}

/* TECLADO NUMÉRICO TÁCTIL (NUMPAD) */
.numpad-container {
  margin-top: 15px;
  background: var(--bg-primary);
  padding: 15px;
  border-radius: 18px;
  border: 2px solid var(--color-border);
}

.numpad-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.numpad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.numpad-btn {
  background-color: white;
  border: 2px solid var(--color-border);
  border-radius: 15px;
  padding: 22px;
  font-size: var(--font-huge);
  font-weight: 800;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.1s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.numpad-btn:active {
  background-color: #e2e8f0;
  transform: scale(0.95);
  box-shadow: none;
}

.numpad-btn.action-btn {
  background-color: #edf2f7;
  font-size: var(--font-large);
  color: #c53030; /* Rojo suave para borrar/limpiar */
}

.numpad-btn.action-btn:active {
  background-color: #cbd5e0;
}

/* BOTÓN DE GUARDADO PRINCIPAL */
.save-btn {
  width: 100%;
  background-color: var(--color-success);
  color: white;
  border: none;
  border-radius: 20px;
  padding: 24px;
  font-size: var(--font-huge);
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 8px 16px rgba(47, 133, 90, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin-top: 15px;
}

.save-btn:hover {
  background-color: var(--color-success-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(72, 187, 120, 0.5);
}

.save-btn:active {
  background-color: var(--color-success-active);
  transform: translateY(1px);
  box-shadow: 0 4px 8px rgba(47, 133, 90, 0.4);
}

/* TOAST / NOTIFICACIONES */
.toast {
  position: fixed;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-success);
  color: white;
  padding: 20px 40px;
  border-radius: 15px;
  font-size: var(--font-large);
  font-weight: 800;
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  z-index: 1000;
  transition: top 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  align-items: center;
  gap: 15px;
}

.toast.show {
  top: 30px;
}

.toast.error {
  background-color: #c53030;
}

/* VISTA DE TOTALES / RESUMEN */
.resumen-header {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 25px;
  background: white;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 4px 6px var(--color-shadow);
}

@media (min-width: 768px) {
  .resumen-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.date-picker-large {
  font-size: var(--font-large);
  padding: 10px 15px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  font-weight: 600;
  background-color: var(--bg-primary);
}

/* TARJETAS DE INDICADORES DE TOTALES */
.kpi-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 30px;
}

@media (min-width: 640px) {
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .kpi-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.kpi-card {
  background: white;
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 4px 10px var(--color-shadow);
  border-left: 8px solid var(--color-primary);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 120px;
}

.kpi-card.kpi-green { border-left-color: var(--color-success); }
.kpi-card.kpi-blue { border-left-color: var(--color-primary-light); }
.kpi-card.kpi-orange { border-left-color: #dd6b20; }

.kpi-label {
  font-size: var(--font-base);
  color: var(--text-secondary);
  font-weight: 600;
}

.kpi-value {
  font-size: var(--font-huge);
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 5px;
}

/* TABLAS Y LISTADOS */
.table-container {
  overflow-x: auto;
  background: white;
  border-radius: 18px;
  box-shadow: 0 4px 10px var(--color-shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 18px 20px;
  border-bottom: 2px solid var(--bg-primary);
  font-size: var(--font-base);
}

th {
  background-color: var(--color-primary);
  color: white;
  font-weight: 800;
  font-size: var(--font-large);
}

tr:last-child td {
  border-bottom: none;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 16px;
  text-transform: uppercase;
}

.tag-cash {
  background-color: #c6f6d5;
  color: #22543d;
}

.tag-card {
  background-color: #bee3f8;
  color: #2a4365;
}

/* LISTA DE ÚLTIMAS VENTAS (Bitácora) */
.ventas-list-card {
  margin-top: 30px;
}

.venta-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
  border-bottom: 2px solid var(--bg-primary);
}

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

.venta-info {
  display: flex;
  flex-direction: column;
}

.venta-cat {
  font-weight: 800;
  font-size: var(--font-large);
  color: var(--text-primary);
}

.venta-time {
  font-size: 16px;
  color: var(--text-secondary);
}

.venta-monto-container {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.venta-val {
  font-weight: 800;
  font-size: var(--font-large);
  color: var(--color-primary);
}

/* INTERRUPTOR (TOGGLE) DE TECLADO TÁCTIL */
.toggle-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: white;
  padding: 12px 18px;
  border-radius: 12px;
  border: 2px solid var(--color-border);
  margin-bottom: 15px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 70px;
  height: 38px;
}

.switch input { 
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 30px;
  width: 30px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--color-success);
}

input:checked + .slider:before {
  transform: translateX(32px);
}

/* MODO INSTALABLE INDICADOR */
.pwa-install-banner {
  background-color: #fffaf0;
  border: 3px dashed #dd6b20;
  padding: 20px;
  border-radius: 15px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  display: none; /* Se activa mediante JS si la app es instalable */
}

.pwa-install-btn {
  background-color: #dd6b20;
  color: white;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: var(--font-large);
  font-weight: 800;
  cursor: pointer;
}