/* ==========================================================================
   Layout - SubstationTopologySim
   Estructura en grid y flexbox con soporte responsivo y paneles desacoplados.
   ========================================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-family-sans);
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
  font-size: 13px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Header */
.app-header {
  height: var(--header-height);
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  z-index: 20;
  flex-shrink: 0;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-icon {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

.brand-badge {
  font-size: 10px;
  font-family: var(--font-family-mono);
  background-color: rgba(37, 99, 235, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Área central de trabajo (Paneles laterales + Canvas) */
.app-workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* Panel Izquierdo: Biblioteca de Componentes */
.sidebar-left {
  width: var(--sidebar-left-width);
  background-color: var(--color-bg-surface);
  border-right: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  z-index: 10;
}

/* Panel Central: Canvas SVG */
.canvas-container {
  flex: 1;
  position: relative;
  background-color: var(--color-bg-canvas);
  overflow: hidden;
  user-select: none;
}

/* Panel Derecho: Inspector de Propiedades */
.sidebar-right {
  width: var(--sidebar-right-width);
  background-color: var(--color-bg-surface);
  border-left: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  z-index: 10;
}

/* Barra de Estado inferior */
.app-statusbar {
  height: var(--statusbar-height);
  background-color: var(--color-bg-surface-elevated);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  font-size: 11px;
  color: var(--color-text-secondary);
  font-family: var(--font-family-mono);
  flex-shrink: 0;
  z-index: 20;
}

.statusbar-section {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-success);
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.6);
}

.status-dot.active {
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}