.cinema-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;

  background:
    radial-gradient(
      ellipse at 50% 60%,
      rgba(255,220,140,.06) 0%,
      rgba(80,45,15,.05) 12%,
      rgba(15,8,3,.35) 28%,
      rgba(5,3,2,.92) 48%,
      #000000 100%
    );
}

#particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .42;
}

.fog {
  position: absolute;
  inset: -25%;
  background:
    radial-gradient(ellipse at 18% 62%, rgba(255, 214, 136, .18), transparent 35%),
    radial-gradient(ellipse at 82% 42%, rgba(191, 112, 35, .15), transparent 39%),
    radial-gradient(ellipse at 52% 50%, rgba(255, 240, 205, .14), transparent 42%);
  filter: blur(32px);
  opacity: .20;
  animation: fogDrift 18s ease-in-out infinite alternate;
  mix-blend-mode: screen;
}

.fog.f2 {
  opacity: .15;
  filter: blur(42px);
  animation-duration: 26s;
  animation-direction: alternate-reverse;
  transform: scale(1.18);
}

.light-rays {
  position: absolute;
  inset: -15%;
  background: conic-gradient(
    from 248deg at 50% 55%,
    transparent 0deg,
    rgba(255, 206, 116, .12) 10deg,
    transparent 23deg,
    transparent 48deg,
    rgba(255, 178, 75, .08) 66deg,
    transparent 84deg,
    transparent 100deg,
    rgba(255, 229, 170, .10) 112deg,
    transparent 130deg,
    transparent 360deg
  );
  filter: blur(20px);
  opacity: .12;
  animation: raysMove 18s ease-in-out infinite alternate;
  mix-blend-mode: screen;
}

.stage-glow {
  position: absolute;
  left: 50%;
  top: 52%;
  width: min(980px, 92vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle at center,
    rgba(255,238,195,.22) 0%,
    rgba(156,83,23,.05) 23%,
    rgba(156, 83, 23, .05) 47%,
    rgba(0, 0, 0, 0) 75%
  );
  filter: blur(4px);
  opacity: .12;
  animation: orbBreath 8s ease-in-out infinite;
  mix-blend-mode: screen;
}

.floor-glow {
  position: absolute;
  left: 50%;
  bottom: 5%;
  width: min(1050px, 98vw);
  height: 190px;
  transform: translateX(-50%);
  background: radial-gradient(
    ellipse at center,
    rgba(238, 158, 58, .28),
    rgba(119, 55, 15, .12) 40%,
    transparent 72%
  );
  filter: blur(18px);
  opacity: 0;
  animation: floorPulse 7s ease-in-out infinite alternate;
}

.vignette {
  position: absolute;
  inset: 0;

  background:
    radial-gradient(
      ellipse at center,
      transparent 0%,
      rgba(0,0,0,.34) 40%,
      rgba(0,0,0,.92) 100%
    ),

    linear-gradient(
      to bottom,
      rgba(0,0,0,.84),
      transparent 30%,
      rgba(0,0,0,.90)
    );

  pointer-events: none;
}
.grain {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  opacity: .085;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 220 220' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)' opacity='.65'/%3E%3C/svg%3E");
  animation: grainShift .9s steps(2, end) infinite;
  mix-blend-mode: overlay;
}

.scene-fader {
  position: fixed;
  inset: 0;
  z-index: 9;
  background: #000;
  opacity: 1;
  pointer-events: none;
  transition: opacity 1800ms cubic-bezier(.22, .7, .18, 1);
}

.scene-fader.is-clear {
  opacity: 0;
}

.scene-fader.is-black {
  opacity: 1;
}

/* INTRO: sfondo più spento */
body.intro-mode .fog,
body.intro-mode .fog.f2,
body.intro-mode .light-rays,
body.intro-mode .stage-glow,
body.intro-mode .floor-glow,
body.intro-mode #particles {
  opacity: .16;
}

/* HERO: lo stesso sfondo si riaccende */
body.hero-mode .fog {
  opacity: .24;
}

body.hero-mode .fog.f2 {
  opacity: .16;
}

body.hero-mode .light-rays {
  opacity: .22;
}

body.hero-mode .stage-glow {
  opacity: .32;
}

body.hero-mode .floor-glow {
  opacity: .26;
}

body.hero-mode #particles {
  opacity: .42;
}

body.intro-mode .cinema-bg {
  opacity: .55;
}

body.hero-mode .cinema-bg {
  opacity: 0 !important;
}

body.intro-mode #particles {
  opacity: .16 !important;
}

body.hero-mode #particles {
  opacity: .42 !important;
}

body.intro-mode .fog,
body.intro-mode .fog.f2,
body.intro-mode .light-rays,
body.intro-mode .stage-glow,
body.intro-mode .floor-glow {
  opacity: .10 !important;
}

body.hero-mode .fog {
  opacity: .24 !important;
}

body.hero-mode .fog.f2 {
  opacity: .16 !important;
}

body.hero-mode .light-rays {
  opacity: .22 !important;
}

body.hero-mode .stage-glow {
  opacity: .32 !important;
}

body.hero-mode .floor-glow {
  opacity: .26 !important;
}