/* ==========================================================================
   Components CSS - Componentes Base, Botones, Tablas, Formularios y Badges
   Artesanía Emil Kowalski, Anti-Slop, Sin Emojis
   ========================================================================== */

/* --------------------------------------------------------------------------
   Skip-Link Accesible para Navegación por Teclado
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: 0;
  left: 1rem;
  background-color: var(--accent-primary);
  color: #FFFFFF;
  padding: 0.65rem 1.25rem;
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-md);
  z-index: 10000;
  transform: translateY(-100%);
  transition: transform var(--transition-fast);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Tarjetas (Cards)
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.card:hover {
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-md);
}

.card-title {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.35rem;
}

.card-subtitle {
  color: var(--text-primary);
  font-size: 1.15rem;
  margin-bottom: 1.25rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Botones Táctiles de Alta Factura (Emil Kowalski Craft)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 38px;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-family-body);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  outline: none;
  transition: transform var(--transition-fast),
              background-color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  box-shadow: 0 0 0 2px var(--bg-surface), 0 0 0 4px var(--border-focus);
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #FFFFFF;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .btn-primary {
  color: #0C0E12;
}

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

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

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

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

.btn-outline:hover {
  background-color: var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

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

.btn-sm {
  min-height: 32px;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-lg {
  min-height: 44px;
  padding: 0.65rem 1.35rem;
  font-size: 0.95rem;
}

.btn-block {
  width: 100%;
}

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

/* --------------------------------------------------------------------------
   Switch Animado de Tema (Lucide Sun/Moon, Cero Emojis)
   -------------------------------------------------------------------------- */
.theme-switch {
  position: relative;
  width: 56px;
  height: 30px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  cursor: pointer;
  outline: none;
  padding: 2px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
  flex-shrink: 0;
}

.theme-switch:focus-visible {
  box-shadow: 0 0 0 2px var(--border-focus);
}

.theme-switch-icon {
  width: 13px;
  height: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: color var(--transition-normal);
}

.theme-switch-icon.sun {
  margin-left: 6px;
}

.theme-switch-icon.moon {
  margin-right: 6px;
}

.theme-switch-thumb {
  position: absolute;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  color: #FFFFFF;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 220ms var(--ease-snappy), background-color var(--transition-normal), width 140ms ease;
}

.theme-switch-thumb svg {
  width: 13px;
  height: 13px;
}

.theme-switch:active .theme-switch-thumb {
  width: 28px;
}

[data-theme="dark"] .theme-switch-thumb {
  transform: translateX(24px);
  color: #0C0E12;
}

[data-theme="dark"] .theme-switch:active .theme-switch-thumb {
  transform: translateX(20px);
}

/* Botón Simulador de Teléfono Móvil */
.btn-simulator-toggle {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  padding: 0.4rem 0.75rem;
  color: var(--text-secondary);
  font-size: 0.775rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.btn-simulator-toggle:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-simulator-toggle:active {
  transform: scale(0.96);
}

.btn-simulator-toggle svg {
  width: 14px;
  height: 14px;
}

/* En dispositivos móviles reales o DevTools (< 860px), ocultar el botón del simulador */
@media (max-width: 859px) {
  #simulator-toggle,
  .btn-simulator-toggle {
    display: none !important;
  }
}

/* --------------------------------------------------------------------------
   Insignias y Etiquetas (Badges)
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background-color: var(--color-badge-bg);
  color: var(--color-badge-text);
  white-space: nowrap;
}

.genre-tag {
  font-size: 0.725rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-badge-bg);
  color: var(--color-badge-text);
}

.role-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.725rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--accent-soft);
  color: var(--accent-text);
}

.country-pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.725rem;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-badge-bg);
  color: var(--color-badge-text);
}

.stock-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-success);
}

.stock-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: currentColor;
}

/* --------------------------------------------------------------------------
   Formularios y Controles
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-family-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-control.is-invalid {
  border-color: var(--color-error) !important;
  box-shadow: 0 0 0 3px var(--color-error-bg) !important;
  background-color: rgba(239, 68, 68, 0.03);
}

[data-theme="dark"] .form-control.is-invalid {
  border-color: #EF4444 !important;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.25) !important;
  background-color: rgba(239, 68, 68, 0.08);
}

.field-error {
  display: none;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.35rem;
  color: var(--color-error);
  line-height: 1.3;
}

.field-error.active {
  display: block;
  animation: fieldErrorSlide 0.15s var(--ease-snappy);
}

[data-theme="dark"] .field-error {
  color: #F87171;
}

@keyframes fieldErrorSlide {
  from {
    opacity: 0;
    transform: translateY(-2px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   Alertas y Notificaciones de Feedback (Accesibles WCAG AA, Colores Vivos)
   -------------------------------------------------------------------------- */
.feedback-container {
  margin-bottom: 1.25rem;
  min-height: 0;
}

.alert {
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.45;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border: 1.5px solid transparent;
  box-shadow: var(--shadow-sm);
  animation: alertSlideIn 0.2s var(--ease-snappy);
}

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

.alert-error {
  background-color: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-error);
  font-weight: 600;
}

[data-theme="dark"] .alert-error {
  background-color: rgba(239, 68, 68, 0.15);
  border-color: #EF4444;
  color: #FCA5A5;
}

.alert-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
  font-weight: 600;
}

[data-theme="dark"] .alert-success {
  background-color: rgba(16, 185, 129, 0.15);
  border-color: #10B981;
  color: #6EE7B7;
}

.alert-info {
  background-color: var(--accent-soft);
  border-color: var(--accent-primary);
  color: var(--accent-text);
  font-weight: 600;
}

[data-theme="dark"] .alert-info {
  background-color: rgba(245, 158, 11, 0.15);
  border-color: #F59E0B;
  color: #FCD34D;
}

/* --------------------------------------------------------------------------
   Tablas Limpias y Responsive
   -------------------------------------------------------------------------- */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

@media (max-width: 859px) {
  .table {
    min-width: 620px; /* En móviles preserva ancho legible y permite swipe horizontal */
  }
}

.isbn-code,
.table td code {
  display: inline-block;
  font-family: var(--font-family-mono);
  font-size: 0.825rem;
  letter-spacing: 0.02em;
  white-space: nowrap !important;
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.table th {
  background-color: var(--bg-surface-alt);
  color: var(--text-muted);
  font-size: 0.725rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--border-color);
}

.table td {
  padding: 0.6rem 0.65rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-editar-libro {
  border-color: var(--border-color);
  color: var(--text-secondary);
}

.btn-editar-libro:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: var(--accent-soft);
}

.table tbody tr:hover {
  background-color: var(--bg-surface-hover);
}

/* --------------------------------------------------------------------------
   Cajas de Estado Visual (Cero Emojis, SVGs Integrados)
   -------------------------------------------------------------------------- */
.state-box {
  padding: 3rem 1.5rem;
  text-align: center;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.state-icon {
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: center;
}

.state-icon svg {
  width: 38px;
  height: 38px;
  color: var(--text-muted);
}

.state-title {
  font-family: var(--font-family-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.state-message {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 50ch;
  margin: 0 auto 1.25rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}