/* ============================================================
   Componentes reutilizables: botones, inputs, checkboxes, cards,
   dropdowns, modales, toasts, chips y skeletons.
   ============================================================ */

/* ---------------------------------------------------------------
   Botones
   --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 9px var(--space-4);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  user-select: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-contrast);
  box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
  background-color: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-border-strong);
  background-color: var(--color-surface-hover);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text);
}

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

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

.btn-sm,
.btn-small {
  padding: 6px var(--space-3);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-md);
  border-radius: var(--radius-md);
  width: 100%;
}

.btn-block {
  width: 100%;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.icon-btn:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text);
}

.icon-btn:active {
  transform: scale(0.92);
}

.icon-flip {
  transform: rotate(180deg);
}

/* Spinner de carga inline para botones (.is-loading) */
.btn.is-loading {
  color: transparent !important;
  pointer-events: none;
  position: relative;
}

.btn.is-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-top-color: transparent;
  color: inherit;
  animation: btn-spin 0.7s linear infinite;
}

.btn-primary.is-loading::after {
  color: var(--color-primary-contrast);
}

.btn-secondary.is-loading::after,
.btn-ghost.is-loading::after {
  color: var(--color-text);
}

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

/* ---------------------------------------------------------------
   Inputs
   --------------------------------------------------------------- */
.input,
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px var(--space-3);
  font-size: var(--font-size-base);
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input::placeholder,
.form-group input::placeholder {
  color: var(--color-text-muted);
}

.input:focus,
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group .input-icon {
  position: absolute;
  left: var(--space-3);
  display: flex;
  color: var(--color-text-muted);
  pointer-events: none;
}

.input-group .input {
  padding-left: var(--space-10);
}

.input-error {
  border-color: var(--color-danger) !important;
}

.field-error {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

/* ---------------------------------------------------------------
   Checkbox custom
   --------------------------------------------------------------- */
.checkbox {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  cursor: pointer;
}

.checkbox input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  cursor: pointer;
}

.checkbox-box {
  position: absolute;
  inset: 0;
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.checkbox-box svg {
  width: 13px;
  height: 13px;
  color: var(--color-primary-contrast);
  transform: scale(0);
  transition: transform var(--transition-fast) var(--ease-spring);
}

.checkbox input:checked ~ .checkbox-box {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox input:checked ~ .checkbox-box svg {
  transform: scale(1);
}

.checkbox input:focus-visible ~ .checkbox-box {
  box-shadow: var(--shadow-focus);
}

.checkbox input:disabled ~ .checkbox-box {
  opacity: 0.5;
  cursor: not-allowed;
}

.checkbox input:active:not(:disabled) ~ .checkbox-box {
  transform: scale(0.9);
}

/* ---------------------------------------------------------------
   Cards
   --------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-fast);
}

.card-padded {
  padding: var(--space-6);
}

/* ---------------------------------------------------------------
   Dropdown custom (reemplaza <select>)
   --------------------------------------------------------------- */
.custom-select {
  position: relative;
}

.custom-select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  min-width: 140px;
  padding: 9px var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  text-align: left;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.custom-select-trigger:hover {
  border-color: var(--color-border-strong);
}

.custom-select.is-open .custom-select-trigger,
.custom-select-trigger:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.custom-select-value {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.custom-select-chevron {
  display: flex;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.custom-select.is-open .custom-select-chevron {
  transform: rotate(180deg);
}

.custom-select-menu {
  position: absolute;
  top: calc(100% + var(--space-1));
  left: 0;
  right: 0;
  min-width: 160px;
  max-height: 240px;
  overflow-y: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  padding: var(--space-1);
  z-index: 30;
  animation: select-menu-in var(--transition-fast) ease;
}

@keyframes select-menu-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.custom-select-option {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.custom-select-option.is-active,
.custom-select-option:hover {
  background-color: var(--color-surface-hover);
}

.custom-select-option.is-selected {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  background-color: var(--color-primary-50);
}

/* ---------------------------------------------------------------
   Modal
   --------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-modal);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.modal-overlay.modal-open {
  opacity: 1;
}

.modal {
  width: 100%;
  max-width: 440px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  transform: scale(0.95) translateY(8px);
  opacity: 0;
  transition: transform var(--transition-base) var(--ease-spring), opacity var(--transition-base);
}

.modal-overlay.modal-open .modal {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-1);
}

.modal-header h3 {
  margin: 0;
}

.modal-task-title {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-5);
}

body.body-scroll-locked {
  overflow: hidden;
}

.share-list-section {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.share-list-section h4 {
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.share-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 200px;
  overflow-y: auto;
}

.share-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.share-list-empty {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ---------------------------------------------------------------
   Toasts
   --------------------------------------------------------------- */
.toast-container {
  position: fixed;
  top: calc(var(--topbar-height) + var(--space-3));
  right: var(--space-5);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: min(360px, calc(100vw - 32px));
  pointer-events: none;
}

.toast-container .toast {
  pointer-events: auto;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transform: translateX(24px);
  opacity: 0;
  transition: transform var(--transition-base) var(--ease-spring), opacity var(--transition-base);
}

.toast-visible {
  transform: translateX(0);
  opacity: 1;
}

.toast-leaving {
  transform: translateX(24px);
  opacity: 0;
}

.toast-icon {
  display: flex;
  flex-shrink: 0;
  margin-top: 1px;
}

.toast-success .toast-icon {
  color: var(--color-success);
}
.toast-error .toast-icon {
  color: var(--color-danger);
}
.toast-warning .toast-icon {
  color: var(--color-warning);
}
.toast-info .toast-icon {
  color: var(--color-info);
}

.toast-message {
  flex: 1;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}

.toast-close {
  display: flex;
  flex-shrink: 0;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: var(--radius-sm);
}

.toast-close:hover {
  color: var(--color-text);
  background: var(--color-surface-hover);
}

/* ---------------------------------------------------------------
   Chips (etiquetas con color por hash) y badges
   --------------------------------------------------------------- */
.tag-chip {
  --chip-hue: 230;
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  background: hsl(var(--chip-hue) 75% 94%);
  color: hsl(var(--chip-hue) 55% 32%);
}

:root[data-theme='dark'] .tag-chip {
  background: hsl(var(--chip-hue) 40% 20%);
  color: hsl(var(--chip-hue) 70% 82%);
}

.tag-chips {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  background: var(--color-surface-hover);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: transparent;
}

.badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: transparent;
}

.badge-write {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: transparent;
}

.badge-read {
  color: var(--color-text-secondary);
}

.priority-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.priority-dot-low {
  background-color: var(--color-priority-low);
}
.priority-dot-medium {
  background-color: var(--color-priority-medium);
}
.priority-dot-high {
  background-color: var(--color-priority-high);
}

/* ---------------------------------------------------------------
   Skeleton loaders
   --------------------------------------------------------------- */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-hover);
  border-radius: var(--radius-sm);
}

.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  animation: skeleton-shimmer 1.4s ease-in-out infinite;
}

:root[data-theme='dark'] .skeleton::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
}

@keyframes skeleton-shimmer {
  100% {
    transform: translateX(100%);
  }
}

.skeleton-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
}

.skeleton-circle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

.skeleton-line {
  height: 12px;
  flex: 1;
  max-width: 320px;
}

/* ---------------------------------------------------------------
   Estados vacíos
   --------------------------------------------------------------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
  gap: var(--space-4);
}

.empty-illustration {
  margin-bottom: var(--space-2);
}

.empty-state h3 {
  color: var(--color-text);
}

.empty-state p {
  max-width: 360px;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* ---------------------------------------------------------------
   Mensajes de error inline
   --------------------------------------------------------------- */
.error-message {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-4);
}

/* ---------------------------------------------------------------
   Menú de acciones colapsable en móvil (details/summary nativo)
   --------------------------------------------------------------- */
.actions-menu summary {
  list-style: none;
}

.actions-menu summary::-webkit-details-marker {
  display: none;
}