#game-container {
    width: 100%;
    height: 100%;
    margin: 0px;
    padding: 0px;
    border: none;
    overflow: hidden;
    background-color: #000;
}

#app-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000000;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease-out;
    perspective: 800px;
}

.loader {
    position: relative;
    width: 100px;
    height: 100px;
    transform-style: preserve-3d;
    margin-bottom: 30px;
    animation: spinContinuous 4s linear infinite;
}

.loader img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    filter: drop-shadow(0px 10px 10px rgba(0, 0, 0, 0.5));
    opacity: 0;
    backface-visibility: hidden;
    /* Transición rápida para que no se note el corte de opacidad */
    transition: opacity 0.05s;
    will-change: transform, opacity;
}

@keyframes spinContinuous {

    /* 1. LEFT (Gira en Y) */
    0% {
        transform: rotateY(-90deg);
    }

    4% {
        transform: rotateY(4deg);
    }

    /* Entra y se pasa un pelín */
    21% {
        transform: rotateY(-4deg);
    }

    /* Cruza lentamente el centro */
    25% {
        transform: rotateY(-90deg);
    }

    /* Sale rápido */

    /* 2. UP (Gira en X) */
    25.01% {
        transform: rotateX(90deg);
    }

    29% {
        transform: rotateX(-4deg);
    }

    46% {
        transform: rotateX(4deg);
    }

    50% {
        transform: rotateX(90deg);
    }

    /* 3. DOWN (Gira en X inv) */
    50.01% {
        transform: rotateX(-90deg);
    }

    54% {
        transform: rotateX(4deg);
    }

    71% {
        transform: rotateX(-4deg);
    }

    75% {
        transform: rotateX(-90deg);
    }

    /* 4. RIGHT (Gira en Y inv) */
    75.01% {
        transform: rotateY(90deg);
    }

    79% {
        transform: rotateY(-4deg);
    }

    96% {
        transform: rotateY(4deg);
    }

    100% {
        transform: rotateY(90deg);
    }
}

/* --- VISIBILIDAD DE IMÁGENES --- */
/* Ajustadas para coincidir con la fase "lenta" de la animación */

.img-left {
    animation: vis-left 4s linear infinite;
}

@keyframes vis-left {
    0% {
        opacity: 0;
    }

    2% {
        opacity: 1;
    }

    23% {
        opacity: 1;
    }

    25% {
        opacity: 0;
    }
}

.img-up {
    animation: vis-up 4s linear infinite;
}

@keyframes vis-up {
    25% {
        opacity: 0;
    }

    27% {
        opacity: 1;
    }

    48% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

.img-down {
    animation: vis-down 4s linear infinite;
}

@keyframes vis-down {
    50% {
        opacity: 0;
    }

    52% {
        opacity: 1;
    }

    73% {
        opacity: 1;
    }

    75% {
        opacity: 0;
    }
}

.img-right {
    animation: vis-right 4s linear infinite;
}

@keyframes vis-right {
    75% {
        opacity: 0;
    }

    77% {
        opacity: 1;
    }

    98% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

/* TEXTO */
#loader-text {
    color: #ffffff;
    font-family: 'Quicksand', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
}