body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  position: relative;
}

/* ── Atmósfera de fondo: orbes de luz + grilla global ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    /* Orbes difusos de profundidad */
    radial-gradient(ellipse 800px 600px at 85% -5%, rgba(0, 102, 255, 0.09), transparent 60%),
    radial-gradient(ellipse 600px 500px at -10% 35%, rgba(133, 158, 160, 0.07), transparent 60%),
    radial-gradient(ellipse 700px 600px at 110% 80%, rgba(0, 102, 255, 0.06), transparent 60%),
    /* Grilla tech muy sutil */
    linear-gradient(rgba(133, 158, 160, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(133, 158, 160, 0.035) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 60px 60px, 60px 60px;
  pointer-events: none;
  transform: translate(var(--atmo-x, 0), var(--atmo-y, 0));
}

/* ── Grano: textura de ruido sutil ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  line-height: 1.15;
}

/* ── Layout ── */
.container {
  width: min(var(--container), 90%);
  margin-inline: auto;
}

.section {
  padding-block: var(--sp-section);
}

/* ── Botones ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--fs-small);
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition);
}

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

.btn-primary:hover {
  background: var(--electric-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text-heading);
}

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

/* ── Cards ── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-4);
  transition: transform var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

/* ── Etiquetas de sección ── */
.tag {
  display: inline-block;
  color: var(--glow);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

/* ── Animación scroll con blur + cascada ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  filter: blur(6px);
  transition: opacity 0.7s ease, transform 0.7s ease, filter 0.7s ease;
  transition-delay: calc(var(--stagger, 0) * 0.12s);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Barra de progreso de scroll ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--electric), #4DA3FF);
  z-index: 200;
  box-shadow: 0 0 12px rgba(0, 102, 255, 0.6);
}

/* ── Etiqueta de categoría (compartida: home, portfolio) ── */
.case-type {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--mist);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  margin-bottom: var(--sp-2);
  width: fit-content;
}

/* ═══ EFECTOS PREMIUM ═══ */

/* ── Cursor personalizado ── */
body.custom-cursor,
body.custom-cursor a,
body.custom-cursor button {
  cursor: none;
}

.cursor-dot {
  position: fixed;
  top: -4px;
  left: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--electric);
  pointer-events: none;
  z-index: 9999;
}

.cursor-ring {
  position: fixed;
  top: -18px;
  left: -18px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid rgba(0, 102, 255, 0.6);
  pointer-events: none;
  z-index: 9998;
  transition: width 0.25s ease, height 0.25s ease, top 0.25s ease,
              left 0.25s ease, background 0.25s ease;
}

.cursor-ring.cursor-hover {
  top: -28px;
  left: -28px;
  width: 56px;
  height: 56px;
  background: rgba(0, 102, 255, 0.12);
  border-color: var(--electric);
}

/* ── Tilt 3D + spotlight en cards ── */
.card.tilt {
  transform-style: preserve-3d;
  transition: transform 0.2s ease, border-color var(--transition);
  position: relative;
  overflow: hidden;
}

/* Resplandor que sigue al mouse dentro de la card */
.card.tilt::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    280px circle at var(--spot-x, 50%) var(--spot-y, 50%),
    var(--glow-soft),
    transparent 65%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.card.tilt:hover::after {
  opacity: 1;
}

/* ── Cortina de transición entre páginas ── */
.page-curtain {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: linear-gradient(135deg, var(--charcoal) 60%, var(--electric) 200%);
  transform: translateY(0);
  transition: transform 0.5s cubic-bezier(0.76, 0, 0.24, 1);
  pointer-events: none;
}

.page-curtain.open {
  transform: translateY(-100%);
}

/* ── Accesibilidad: respeta "reducir movimiento" ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .page-curtain { display: none; }
}

/* ── Border glow: borde luminoso que sigue al cursor ── */
.card.glow-border {
  position: relative;
}

.card.glow-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 2px;
  background: radial-gradient(
    250px circle at var(--glow-x, 50%) var(--glow-y, 50%),
    var(--glow),
    transparent 70%
  );
  /* Máscara: deja visible SOLO el anillo del borde */
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.card.glow-border:hover::before {
  opacity: 1;
}

/* ── Shimmer: destello que recorre el borde de los botones primarios ── */
.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(100deg,
    transparent 20%, var(--glow) 50%, transparent 80%);
  background-size: 250% 100%;
  background-position: 200% 0;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  animation: shimmerSlide 3s linear infinite;
  pointer-events: none;
}

@keyframes shimmerSlide {
  to { background-position: -200% 0; }
}