/* ─────────────────────────────────────────────
   NAV + CURSOR v2
   Cursor con mix-blend-mode difference REAL
───────────────────────────────────────────── */

/* ── Cursor punto ── */
#cur {
  position: fixed;
  width: 8px;
  height: 8px;
  background: var(--black);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  will-change: transform;
}

/* ── Follower — mix-blend-mode difference REAL ──
   Blanco sólido al 100% + difference = invierte
   exactamente lo que está debajo
   Sobre texto negro → texto se ve blanco
   Sobre imagen → colores invertidos
   Sobre fondo blanco → aparece como disco negro
*/
#cur-follower {
  position: fixed;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  mix-blend-mode: difference;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  will-change: transform;
  /* SIN opacity, SIN border, SIN transition de opacidad
     El blend-mode hace todo el trabajo */
  transition: width 0.35s cubic-bezier(0.16,1,0.3,1),
              height 0.35s cubic-bezier(0.16,1,0.3,1);
}

/* Hover genérico — crece levemente */
body.cursor-hover #cur-follower {
  width: 64px;
  height: 64px;
}

/* Hover sobre obras — más grande */
body.cursor-obra #cur-follower {
  width: 88px;
  height: 88px;
}

/* Punto negro se vuelve blanco en fondos oscuros
   automáticamente gracias al blend-mode del follower */

/* ── Navegación ── */
#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(1rem, 2.5vw, 1.5rem) var(--pad-x);
  opacity: 0;
  transition: background 0.4s, backdrop-filter 0.4s;
}

#main-nav.scrolled {
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

/* Hero tiene fondo oscuro — nav texto blanco */
#main-nav.on-dark {
  color: white;
}
#main-nav.on-dark .nav-logo,
#main-nav.on-dark .nav-links a {
  color: rgba(255,255,255,0.85);
}
#main-nav.on-dark.scrolled {
  background: rgba(10,10,12,0.88);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-logo {
  font-family: var(--sans);
  font-size: clamp(0.7rem, 1.5vw, 0.8rem);
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--black);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-logo__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--red);
  display: inline-block;
}

.nav-links {
  display: flex;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.nav-links a {
  font-size: clamp(0.6rem, 1.2vw, 0.7rem);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.3s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0; right: 0;
  height: 1px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1);
}

.nav-links a:hover { color: var(--black); }
.nav-links a:hover::after { transform: scaleX(1); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1), opacity 0.3s;
  transform-origin: center;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile menu */
#mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 490;
  background: var(--bg-alt1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s cubic-bezier(0.16,1,0.3,1);
}

#mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

#mobile-menu a {
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--black);
  transition: color 0.2s;
}

#mobile-menu a:hover { color: var(--red); }