/* =========================================
   ANIMATIONS.CSS — Keyframes e Estados GSAP
   ========================================= */

/* Reveal por ScrollTrigger — base invisível */
.animar-entrada {
    visibility: hidden;
}

/* =========================================
   GRAIN OVERLAY — Ruído Cinematográfico
   SVG feTurbulence animado via CSS
   ========================================= */
#grain-overlay {
    position: fixed;
    inset: -50%;
    width: 200%;
    height: 200%;
    z-index: 9997;
    pointer-events: none;
    opacity: 0.015;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 220px 220px;
    animation: grain-shift 0.45s steps(1) infinite;
    will-change: transform;
}

@keyframes grain-shift {
    0%   { transform: translate(0, 0); }
    10%  { transform: translate(-3%, -2%); }
    20%  { transform: translate(2%,  3%); }
    30%  { transform: translate(-1%,  4%); }
    40%  { transform: translate(4%, -1%); }
    50%  { transform: translate(-2%,  2%); }
    60%  { transform: translate(3%, -3%); }
    70%  { transform: translate(-4%,  1%); }
    80%  { transform: translate(2%, -2%); }
    90%  { transform: translate(-3%,  3%); }
    100% { transform: translate(0, 0); }
}

/* Desativa grain em telas de baixa performance / prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    #grain-overlay { animation: none; }
}

/* =========================================
   PENSAMENTOS — Estado Inicial 3D
   ========================================= */
.pensamentos-stage {
    perspective: 900px;
    perspective-origin: 50% 50%;
}

.pensamentos-world {
    transform-style: preserve-3d;
    will-change: transform;
}