/* ==========================================================================
   SISTEMA DE DISEÑO MATERIAL DESIGN 3 - PALETA "BLUE-GREEN FLEET"
   ========================================================================== */

:root {
  /* Fuentes */
  --md-font-title: 'Outfit', 'Google Sans', sans-serif;
  --md-font-body: 'Roboto', sans-serif;

  /* Colores del Sistema (Design Tokens - Paleta Blue-Green Fleet) */
  --md-sys-color-primary: #0A57D0;              /* Azul M3 principal para títulos y acciones */
  --md-sys-color-on-primary: #FFFFFF;           /* Texto sobre primary */
  --md-sys-color-primary-container: #D3E3FD;     /* Fondo activo píldoras */
  --md-sys-color-on-primary-container: #041E49;  /* Texto sobre contenedor activo */
  
  --md-sys-color-secondary: #535F70;            /* Gris Azulado secundario */
  --md-sys-color-secondary-container: #E1E2E9;  /* Fondo de superficies secundarias */
  --md-sys-color-on-secondary-container: #101C2B;
  
  --md-sys-color-tertiary: #0D9061;             /* Verde Teja/Azulado para estados OK y acentos */
  --md-sys-color-tertiary-container: #C2E7D9;   /* Contenedor terciario */
  --md-sys-color-on-tertiary-container: #002012;
  
  --md-sys-color-surface: #FFFFFF;              /* Superficie base blanca */
  --md-sys-color-on-surface: #1C1B1F;           /* Texto oscuro principal */
  --md-sys-color-surface-container-low: #F0F4F9;/* Gris muy claro para filas expandibles / áreas */
  --md-sys-color-surface-container: #ECEFF5;
  --md-sys-color-background: #F8F9FA;           /* Fondo general Google Style */
  --md-sys-color-on-background: #1C1B1F;
  
  --md-sys-color-outline: #C4C7C5;              /* Gris para bordes */
  --md-sys-color-error: #B3261E;                /* Rojo de error o acción destructiva */
  --md-sys-color-on-error: #FFFFFF;
  
  /* Elevación (Sombras MD3) */
  --md-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
  --md-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
  --md-elevation-3: 0px 1px 3px 0px rgba(0,0,0,0.3), 0px 4px 8px 3px rgba(0,0,0,0.15);

  /* Curvas de Animación */
  --md-transition-duration: 250ms;
  --md-easing-standard: cubic-bezier(0.2, 0, 0, 1);
  --md-easing-accelerate: cubic-bezier(0.3, 0, 1, 1);
  --md-easing-decelerate: cubic-bezier(0, 0, 0.2, 1);
}

/* ==========================================================================
   RESET & ESTILOS BASE
   ========================================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--md-font-body);
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--md-font-title);
  font-weight: 500;
  color: var(--md-sys-color-primary); /* Forzar títulos azules por regla de paleta */
}

/* ==========================================================================
   TOP APP BAR (Barra Superior)
   ========================================================================== */

.top-app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 16px;
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

.top-app-bar__left, .top-app-bar__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.top-app-bar__title {
  font-size: 22px;
  font-family: var(--md-font-title);
  font-weight: 400;
  margin-left: 12px;
  user-select: none;
  letter-spacing: -0.5px;
}

/* ==========================================================================
   BOTONES E ICONOS (Material Ripple)
   ========================================================================== */

.md-button-icon {
  background: none;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color var(--md-transition-duration) var(--md-easing-standard);
}

.md-button-icon:hover {
  background-color: rgba(10, 87, 208, 0.08);
}

.md-button-icon:active {
  background-color: rgba(10, 87, 208, 0.16);
}

/* Botón Relleno M3 (Filled Button) */
.md-btn-filled {
  font-family: var(--md-font-title);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.1px;
  color: var(--md-sys-color-on-primary);
  background-color: var(--md-sys-color-primary);
  border: none;
  height: 40px;
  padding: 0 24px;
  border-radius: 20px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--md-transition-duration) var(--md-easing-standard),
              background-color var(--md-transition-duration) var(--md-easing-standard);
}

.md-btn-filled:hover {
  background-color: #084BB3;
  box-shadow: var(--md-elevation-1);
}

.md-btn-filled:active {
  background-color: #063E96;
}

/* Botón Tonal M3 (Tonal Button) */
.md-btn-tonal {
  font-family: var(--md-font-title);
  font-weight: 500;
  font-size: 14px;
  color: var(--md-sys-color-on-primary-container);
  background-color: var(--md-sys-color-primary-container);
  border: none;
  height: 40px;
  padding: 0 24px;
  border-radius: 20px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
  transition: background-color var(--md-transition-duration) var(--md-easing-standard);
}

.md-btn-tonal:hover {
  background-color: #BFD3F2;
}

/* Efecto Ripple */
.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple-animation 600ms linear;
  background-color: rgba(255, 255, 255, 0.35);
  pointer-events: none;
}

.md-button-icon .ripple {
  background-color: rgba(10, 87, 208, 0.2);
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ==========================================================================
   LAYOUT GENERAL & NAVIGATION DRAWER (Menú Izquierdo)
   ========================================================================== */

.app-container {
  display: flex;
  flex: 1;
  margin-top: 64px;
  height: calc(100vh - 64px);
  position: relative;
}

/* Menú de Navegación Lateral (MD3 Drawer) */
.navigation-drawer {
  width: 320px;
  background-color: var(--md-sys-color-surface);
  border-right: 1px solid var(--md-sys-color-outline);
  display: flex;
  flex-direction: column;
  padding: 12px;
  overflow-y: auto;
  transition: transform var(--md-transition-duration) var(--md-easing-standard);
  z-index: 90;
  flex-shrink: 0;
}

/* Ocultar en móviles por defecto */
@media (max-width: 900px) {
  .navigation-drawer {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    box-shadow: var(--md-elevation-3);
  }
  .navigation-drawer.open {
    transform: translateX(0);
  }
}

/* Items del Drawer */
.drawer-group {
  margin-bottom: 8px;
}

.drawer-group__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 16px 0 24px;
  border-radius: 28px;
  cursor: pointer;
  user-select: none;
  transition: background-color var(--md-transition-duration) var(--md-easing-standard);
  margin-bottom: 4px;
}

.drawer-group__header:hover {
  background-color: rgba(10, 87, 208, 0.04);
}

.drawer-group__header-content {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--md-sys-color-primary);
  font-family: var(--md-font-title);
  font-weight: 500;
  font-size: 16px;
}

.drawer-group__arrow {
  transition: transform var(--md-transition-duration) var(--md-easing-standard);
  color: var(--md-sys-color-secondary);
}

.drawer-group.open .drawer-group__arrow {
  transform: rotate(180deg);
}

/* Contenedor de sub-items (Colapsable con transición de altura) */
.drawer-group__subitems {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--md-transition-duration) var(--md-easing-standard),
              opacity var(--md-transition-duration) var(--md-easing-standard);
  opacity: 0;
  padding-left: 16px;
}

.drawer-group.open .drawer-group__subitems {
  max-height: 350px; /* Suficiente para albergar las 5 subopciones */
  opacity: 1;
}

/* Sub-item */
.drawer-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 16px 0 24px;
  border-radius: 24px; /* Esquinas tipo píldora */
  text-decoration: none;
  color: var(--md-sys-color-on-surface);
  font-size: 14px;
  font-family: var(--md-font-body);
  cursor: pointer;
  transition: background-color var(--md-transition-duration) var(--md-easing-standard),
              color var(--md-transition-duration) var(--md-easing-standard);
  margin-bottom: 2px;
}

.drawer-item:hover {
  background-color: rgba(10, 87, 208, 0.06);
}

.drawer-item.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-weight: 500;
}

.drawer-item.active .material-symbols-rounded {
  color: var(--md-sys-color-primary);
  font-variation-settings: 'FILL' 1;
}

/* ==========================================================================
   ÁREA DE CONTENIDO PRINCIPAL
   ========================================================================== */

.main-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  background-color: var(--md-sys-color-background);
}

/* ==========================================================================
   PRESENTACIÓN DE DATOS (Accordion Pattern / Filas Expandibles)
   ========================================================================== */

.catalog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.catalog-title {
  font-size: 28px;
  font-family: var(--md-font-title);
  color: var(--md-sys-color-primary);
}

.catalog-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 1000px;
}

/* Fila de Catálogo (Accordion) */
.catalog-row {
  background-color: var(--md-sys-color-surface);
  border-radius: 12px;
  border: 1px solid var(--md-sys-color-outline);
  overflow: hidden;
  transition: box-shadow var(--md-transition-duration) var(--md-easing-standard),
              border-color var(--md-transition-duration) var(--md-easing-standard);
}

.catalog-row:hover {
  box-shadow: var(--md-elevation-1);
  border-color: var(--md-sys-color-primary);
}

.catalog-row__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  cursor: pointer;
  user-select: none;
}

.catalog-row__main {
  display: flex;
  align-items: center;
  gap: 16px;
}

.catalog-row__title {
  font-family: var(--md-font-title);
  font-size: 16px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
}

.catalog-row__subtitle {
  font-size: 13px;
  color: var(--md-sys-color-secondary);
  margin-top: 2px;
}

.catalog-row__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Área de Detalle Expandida (Accordion Pattern) */
.catalog-row__detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--md-transition-duration) var(--md-easing-standard);
  background-color: var(--md-sys-color-surface-container-low); /* Fondo según reglas de UX */
  border-top: 0 solid var(--md-sys-color-outline);
}

.catalog-row.expanded .catalog-row__detail {
  max-height: 500px;
  border-top-width: 1px;
}

.catalog-row__detail-content {
  padding: 20px 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  font-size: 14px;
}

.detail-item__label {
  font-weight: 500;
  color: var(--md-sys-color-secondary);
  margin-bottom: 4px;
  font-size: 12px;
}

.detail-item__value {
  color: var(--md-sys-color-on-surface);
}

/* Badges de Estado */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.status-badge--active {
  background-color: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
}

/* Acciones de Fila (Trailing Icons) */
.action-btn--edit {
  color: var(--md-sys-color-primary);
}

.action-btn--delete {
  color: var(--md-sys-color-error);
}

/* ==========================================================================
   RIGHT SIDE SHEET (Panel Lateral de Edición)
   ========================================================================== */

/* Scrim / Backdrop */
.scrim {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.32); /* 32% opacidad según regla UX */
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--md-transition-duration) var(--md-easing-standard);
}

.scrim.open {
  opacity: 1;
  pointer-events: auto;
}

/* Panel Lateral */
.side-sheet {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 480px;
  min-width: 320px;
  max-width: 90vw;
  background-color: var(--md-sys-color-surface);
  box-shadow: var(--md-elevation-3);
  z-index: 210;
  transform: translateX(100%);
  transition: transform var(--md-transition-duration) var(--md-easing-standard);
  display: flex;
  flex-direction: column;
}

.side-sheet.open {
  transform: translateX(0);
}

/* Splitter Redimensionable (Borde Izquierdo) */
.side-sheet__splitter {
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  bottom: 0;
  cursor: col-resize;
  border-left: 1px solid var(--md-sys-color-outline);
  transition: background-color var(--md-transition-duration) var(--md-easing-standard);
  z-index: 5;
}

.side-sheet__splitter:hover, .side-sheet__splitter.active {
  background-color: rgba(10, 87, 208, 0.1);
}

/* Cabecera del Panel */
.side-sheet__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--md-sys-color-outline);
}

.side-sheet__title {
  font-size: 20px;
  font-family: var(--md-font-title);
  color: var(--md-sys-color-primary);
}

/* Formulario */
.side-sheet__content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

.side-sheet__footer {
  padding: 16px 24px;
  border-top: 1px solid var(--md-sys-color-outline);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Campos de Formulario M3 Outlined */
.form-field {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.form-field__input {
  height: 56px;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 4px;
  padding: 16px;
  font-size: 16px;
  font-family: var(--md-font-body);
  background: transparent;
  color: var(--md-sys-color-on-surface);
  transition: border-color var(--md-transition-duration) var(--md-easing-standard);
  width: 100%;
}

.form-field__input:focus {
  outline: none;
  border-color: var(--md-sys-color-primary);
  border-width: 2px;
}

.form-field__label {
  position: absolute;
  left: 16px;
  top: 18px;
  background-color: var(--md-sys-color-surface);
  padding: 0 4px;
  color: var(--md-sys-color-secondary);
  transition: transform var(--md-transition-duration) var(--md-easing-standard),
              color var(--md-transition-duration) var(--md-easing-standard);
  pointer-events: none;
  font-size: 16px;
}

/* Efecto flotante cuando hay texto o está en foco */
.form-field__input:focus ~ .form-field__label,
.form-field__input:not(:placeholder-shown) ~ .form-field__label {
  transform: translate(-4px, -26px) scale(0.85);
  color: var(--md-sys-color-primary);
}

/* ==========================================================================
   SNACKBAR (Notificaciones)
   ========================================================================== */

.snackbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translate(-50%, 100px);
  background-color: #313033; /* Color oscuro MD3 */
  color: #F4EFF4;
  padding: 14px 24px;
  border-radius: 4px;
  box-shadow: var(--md-elevation-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  z-index: 1000;
  transition: transform var(--md-transition-duration) var(--md-easing-standard);
  min-width: 344px;
  max-width: 568px;
}

.snackbar.show {
  transform: translate(-50%, 0);
}

.snackbar__action {
  color: var(--md-sys-color-primary-container);
  background: none;
  border: none;
  font-family: var(--md-font-title);
  font-weight: 500;
  cursor: pointer;
  text-transform: uppercase;
}

/* ==========================================================================
   PANTALLA DE CARGA (Progress Indicators)
   ========================================================================== */

.loader-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.7);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--md-transition-duration) var(--md-easing-standard);
}

.loader-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.md-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--md-sys-color-primary-container);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}