/* Reset y fundamentos compartidos entre frontend y consola */

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

html {
  font: 100%/1.5 var(--font-cuerpo);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--texto-principal);
  font-size: var(--fs-cuerpo);
  line-height: var(--lh-cuerpo);
  letter-spacing: var(--ls-cuerpo);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4, p { margin: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
}

.h-display {
  font-size: var(--fs-display);
  line-height: var(--lh-display);
  letter-spacing: var(--ls-display);
}

.h-titulo {
  font-size: var(--fs-titulo);
  line-height: var(--lh-titulo);
  letter-spacing: var(--ls-titulo);
}

.h-subtitulo {
  font-family: var(--font-cuerpo);
  font-size: var(--fs-subtitulo);
  line-height: var(--lh-subtitulo);
  color: var(--texto-secundario);
}

.texto-pequeno {
  font-size: var(--fs-pequeno);
  line-height: var(--lh-pequeno);
  letter-spacing: var(--ls-pequeno);
}

.italic-signature em,
em.signature {
  font-style: italic;
}

.contenedor {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* ---- Foco accesible: visible siempre por teclado, discreto por mouse ---- */
:focus-visible {
  outline: 2px solid var(--accion);
  outline-offset: 3px;
  border-radius: 4px;
}
:focus:not(:focus-visible) { outline: none; }

/* ---- Botones ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.375rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--dur-instant) var(--ease-out),
              background-color var(--dur-rapida) ease,
              border-color var(--dur-rapida) ease,
              box-shadow var(--dur-rapida) ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }

.btn-primario {
  background: var(--color-negro);
  color: var(--color-crema);
}
.btn-primario:hover { background: var(--color-negro-suave); }

.btn-acento {
  background: var(--accion);
  color: #fff;
}
.btn-acento:hover { background: var(--accion-hover); }

.btn-secundario {
  background: transparent;
  border-color: var(--borde-sutil);
  color: var(--texto-principal);
}
.btn-secundario:hover { border-color: var(--color-negro); }

.btn-fantasma {
  background: transparent;
  color: var(--texto-secundario);
  padding: 0.5rem 0.75rem;
}
.btn-fantasma:hover { color: var(--texto-principal); }

.btn-peligro {
  background: transparent;
  border-color: rgba(194, 59, 59, 0.35);
  color: var(--peligro);
}
.btn-peligro:hover { background: rgba(194, 59, 59, 0.08); }

.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---- Campos de formulario ---- */
.campo { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: var(--space-4); }
.campo label { font-size: 0.875rem; font-weight: 600; }
.campo .ayuda { font-size: 0.8125rem; color: var(--texto-secundario); }

.input, .select, .textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--borde-sutil);
  background: var(--bg-elevado);
  font-size: 0.9375rem;
  transition: border-color var(--dur-rapida) ease, box-shadow var(--dur-rapida) ease;
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accion);
  box-shadow: 0 0 0 3px rgba(68, 0, 255, 0.12);
  outline: none;
}
.textarea { resize: vertical; min-height: 6rem; }

/* ---- Utilidades de animación (emil-design-eng: transform/opacity únicamente) ---- */
.fade-in {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--dur-lenta) var(--ease-out), transform var(--dur-lenta) var(--ease-out);
}
.fade-in.en-vista {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * {
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  transition: opacity var(--dur-media) var(--ease-out), transform var(--dur-media) var(--ease-out);
}
.stagger.en-vista > * {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.stagger.en-vista > *:nth-child(1) { transition-delay: 0ms; }
.stagger.en-vista > *:nth-child(2) { transition-delay: 45ms; }
.stagger.en-vista > *:nth-child(3) { transition-delay: 90ms; }
.stagger.en-vista > *:nth-child(4) { transition-delay: 135ms; }
.stagger.en-vista > *:nth-child(5) { transition-delay: 180ms; }
.stagger.en-vista > *:nth-child(6) { transition-delay: 225ms; }
.stagger.en-vista > *:nth-child(n+7) { transition-delay: 260ms; }

@media (prefers-reduced-motion: reduce) {
  .fade-in, .stagger > * {
    transition: opacity var(--dur-media) ease !important;
    transform: none !important;
  }
  html { scroll-behavior: auto; }
}

/* ---- Toast de confirmación reutilizable ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: var(--space-8);
  transform: translate(-50%, 12px);
  opacity: 0;
  background: var(--color-negro);
  color: var(--color-crema);
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  font-size: 0.875rem;
  box-shadow: var(--sombra-flotante);
  transition: transform var(--dur-media) var(--ease-out), opacity var(--dur-media) var(--ease-out);
  pointer-events: none;
  z-index: 90;
}
.toast.visible {
  transform: translate(-50%, 0);
  opacity: 1;
}

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