/* skeleton.css — Skeleton loaders para estados de carga — Rowzen */

/* ===== BASE SKELETON ===== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-hover)    50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
  border-radius: var(--border-radius-sm);
  color: transparent !important;
  pointer-events: none;
  user-select: none;
}

.skeleton * { visibility: hidden; }

/* ===== VARIANTES DE FORMA ===== */

/* Línea de texto */
.skeleton-text {
  height: 1rem;
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-2);
}

.skeleton-text.short  { width: 40%; }
.skeleton-text.medium { width: 65%; }
.skeleton-text.long   { width: 90%; }
.skeleton-text.full   { width: 100%; }

/* Título grande */
.skeleton-title {
  height: 1.5rem;
  width: 55%;
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-3);
}

/* Avatar/ícono circular */
.skeleton-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-avatar.sm { width: 2rem; height: 2rem; }
.skeleton-avatar.lg { width: 3.5rem; height: 3.5rem; }

/* Bloque rectangular (imagen, gráfico) */
.skeleton-block {
  width: 100%;
  height: 180px;
  border-radius: var(--border-radius-base);
}

.skeleton-block.sm { height: 80px; }
.skeleton-block.lg { height: 280px; }

/* ===== SKELETON ROW — para tablas y listas ===== */

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

.skeleton-row .skeleton-cell {
  height: 0.875rem;
  border-radius: var(--border-radius-sm);
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-hover)    50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}

.skeleton-row .skeleton-cell:nth-child(1) { flex: 2; }
.skeleton-row .skeleton-cell:nth-child(2) { flex: 3; }
.skeleton-row .skeleton-cell:nth-child(3) { flex: 2; }
.skeleton-row .skeleton-cell:nth-child(4) { flex: 1; }
.skeleton-row .skeleton-cell:nth-child(5) { flex: 1; width: 60px; }

/* ===== SKELETON CARD ===== */

.skeleton-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-5);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.skeleton-card .skeleton-card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-2);
}

.skeleton-card .skeleton-card-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--border-radius-base);
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-hover)    50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
  flex-shrink: 0;
}

/* ===== SKELETON STAT CARD ===== */

.skeleton-stat {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-5);
}

.skeleton-stat .skeleton-stat-value {
  height: 2rem;
  width: 50%;
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-2);
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-hover)    50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}

.skeleton-stat .skeleton-stat-label {
  height: 0.75rem;
  width: 70%;
  border-radius: var(--border-radius-sm);
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 25%,
    var(--color-bg-hover)    50%,
    var(--color-bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite linear;
}

/* ===== SKELETON WRAPPER — contenedor con estado visible/oculto ===== */

.skeleton-wrapper {
  display: none;
}

.skeleton-wrapper.is-loading {
  display: block;
}

/* Conveniente: ocultar contenido real mientras carga */
.content-wrapper.is-loading {
  display: none;
}

/* ===== SKELETON GRID — para grids de cards ===== */

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-4);
}

@media (max-width: 640px) {
  .skeleton-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== ANIMACIONES ESCALONADAS (stagger) ===== */

.skeleton-row:nth-child(2) .skeleton-cell,
.skeleton-card:nth-child(2) .skeleton,
.skeleton-stat:nth-child(2) .skeleton-stat-value { animation-delay: 0.1s; }

.skeleton-row:nth-child(3) .skeleton-cell,
.skeleton-card:nth-child(3) .skeleton,
.skeleton-stat:nth-child(3) .skeleton-stat-value { animation-delay: 0.2s; }

.skeleton-row:nth-child(4) .skeleton-cell,
.skeleton-card:nth-child(4) .skeleton,
.skeleton-stat:nth-child(4) .skeleton-stat-value { animation-delay: 0.3s; }

/* ===== REDUCIR MOVIMIENTO ===== */

@media (prefers-reduced-motion: reduce) {
  .skeleton,
  .skeleton-cell,
  .skeleton-card-icon,
  .skeleton-stat-value,
  .skeleton-stat-label {
    animation: none;
    background: var(--color-bg-tertiary);
  }
}