/**
 * Estilos críticos embebidos en el HTML inicial (antes del bundle JS/CSS de Vite).
 * Evita FOUC: fondo, tipografía base y pantalla de arranque sin depender de Tailwind.
 */
html {
  color-scheme: light;
}

html.dark {
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: #f9fafb;
  color: #0f172a;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html.dark body {
  background-color: #030712;
  color: #f1f5f9;
}

/* Ocultar app hasta rehidratación; el overlay cubre la pantalla */
html.app-booting #root {
  visibility: hidden;
  pointer-events: none;
}

html.app-ready #root {
  visibility: visible;
  pointer-events: auto;
}

#app-boot-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  background: #f9fafb;
  transition: opacity 0.2s ease-out;
}

html.dark #app-boot-overlay {
  background: #030712;
}

html.app-ready #app-boot-overlay {
  opacity: 0;
  pointer-events: none;
}

#app-boot-overlay .boot-logo {
  width: 3rem;
  height: 3rem;
  border-radius: 1rem;
  background: linear-gradient(135deg, #0bad9a 0%, #021433 100%);
  opacity: 0.9;
  animation: boot-pulse 1.4s ease-in-out infinite;
}

#app-boot-overlay .boot-spinner {
  width: 2rem;
  height: 2rem;
  border: 3px solid #e5e7eb;
  border-top-color: #7c3aed;
  border-radius: 50%;
  animation: boot-spin 0.75s linear infinite;
}

html.dark #app-boot-overlay .boot-spinner {
  border-color: #1f2937;
  border-top-color: #a78bfa;
}

#app-boot-overlay .boot-label {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: #64748b;
  letter-spacing: 0.02em;
}

html.dark #app-boot-overlay .boot-label {
  color: #94a3b8;
}

#app-boot-overlay .boot-skeleton {
  width: min(18rem, 72vw);
  height: 0.5rem;
  border-radius: 9999px;
  background: linear-gradient(90deg, #e5e7eb 25%, #f3f4f6 50%, #e5e7eb 75%);
  background-size: 200% 100%;
  animation: boot-shimmer 1.2s ease-in-out infinite;
}

html.dark #app-boot-overlay .boot-skeleton {
  background: linear-gradient(90deg, #1f2937 25%, #374151 50%, #1f2937 75%);
  background-size: 200% 100%;
}

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

@keyframes boot-pulse {
  0%,
  100% {
    opacity: 0.75;
    transform: scale(0.96);
  }
  50% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes boot-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}