*{
  margin: 0;
}









.background__fondo {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -100;
}

.glass-effect {
  position: absolute;
  width: 100%;
  height: 100%;
  backdrop-filter: brightness(0.9);
  background: rgba(255, 255, 255, 0.02);
  z-index: 0;
}










/* Fondo general */
.background_menu {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: start;
  z-index: 0;
  overflow: hidden;
  }

  .glass-effect_menu {
    position: absolute;
    width: 100%;
    height: 100%;
    backdrop-filter: brightness(0.9);
    background: rgba(255, 255, 255, 0.02);
    filter: blur(6px);
    z-index: 0;
  }
  
  /* Animación del fondo */
  @keyframes gradientShift {
    0% {
      background-position: top;
    }
    100% {
      background-position: bottom;
    }
  }
  
  /* Textura con partículas sutiles */
  .background_menu::before,
  .background_menu::after {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    pointer-events: none;
    background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    animation: sparkleDrift 45s linear infinite;
    opacity: 0.4;
    z-index: 2;
  }
  
  /* Movimiento de las partículas */
  @keyframes sparkleDrift {
    0% {
      transform: translate(0, 0) rotate(0deg);
    }
    100% {
      transform: translate(20px, 40px) rotate(360deg);
    }
  }
  
  /* Glow detrás de las tarjetas */
  .card_3d::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(255, 255, 255, 0.07), transparent 60%);
    filter: blur(80px);
    z-index: 0;
    pointer-events: none;
  }  
  
  
  
  
  
  
  
  
  
  
  
  
  /* Estructura central */
  .content_menu {
    width: 100%;
    min-height: 100vh;
    display: flex;
    position: relative;
    align-items: center;
    justify-content: center;
  }
  
  .menu_principal_content {
    position: relative;
    width: 98%;
    height: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-template-rows: 31vh 31vh 31vh;
    align-items: center;
    gap: 1vh;
  }
  








/* Tarjeta 3D */
.card_3d {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
    background: #fff;
    border-radius: 20px;
    transform: translateY(0) scale(1);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.25);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    will-change: transform;
    animation: fadeAppear 0.6s ease-out both;
    backface-visibility: hidden;
    isolation: isolate;
    border: none; /* Elimina cualquier borde visual */
  }
  
  /* Hover efecto */
  .card_3d:not(.disabled):hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow:
      0 20px 50px rgba(0, 0, 0, 0.4),
      inset 0 0 8px rgba(255, 255, 255, 0.03),
      0 0 4px rgba(255, 255, 255, 0.04);
  }
  
  
  /* Contenido interno */
  .card_inner {
    width: 100%;
    height: 100%;
    position: relative;
    border-radius: inherit;
    overflow: hidden;
  }
  
  /* Imagen base */
  .card_inner img.base_img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    border: none;
    border-radius: inherit;
    transition: filter 0.4s ease, transform 0.4s ease;
    will-change: filter, transform;
    backface-visibility: hidden;
  }
  
  /* Hover imagen */
  .card_3d:hover .base_img {
    filter: brightness(0.55) saturate(1.05);
    transform: scale(1.015);
  }
  
  /* Título */
  .card_title {
    position: absolute;
    top: 2px;
    left: 2px;
    font-size: 1.5rem;
    font-weight: 700;
    z-index: 3;
    padding: 10px 22px;
    border-radius: 16px;
    font-family: 'Segoe UI', sans-serif;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    background: rgba(18, 18, 18, 0.45);
    backdrop-filter: blur(10px);
    color: #ffffff;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    border: none;
  }
  
  /* Título hover */
  .card_3d:hover .card_title {
    /* transform: translateY(-2px) scale(1.04); */
    opacity: 0;
  }
  
  /* Texto oculto */
  .hover_text {
    position: absolute;
    inset: 0;
    padding: 36px 28px;
    font-size: 1rem;
    font-weight: 400;
    background: rgba(0, 0, 0, 0.6);
    color: #ffffff;
    z-index: 2;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.5s ease, transform 0.4s ease, visibility 0s linear 0.5s;
    font-family: 'Segoe UI', sans-serif;
    line-height: 1.8;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: 20px;
    transform: scale(0.5);
    text-wrap: balance;
    border: none;
  }
  
  /* Hover texto */
  .card_3d:hover .hover_text {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
    pointer-events: auto;
    transition-delay: 0s;
  }
  
  /* Animación inicial */
  /* @keyframes fadeAppear {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  } */
  



/*TARJETAS DESACTIVADAS*/
  .card_3d.disabled {
    filter: grayscale(100%) brightness(0.5);
    position: relative;
  }
  
  .card_3d.disabled::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    border-radius: 20px;
    backdrop-filter: blur(1px);
  }

  .card_3d.disabled .hover_text {
    opacity: 0;
    visibility: hidden;
    transform: scale(0.5);
    transition: opacity 0.4s ease, transform 0.4s ease, visibility 0s linear 0.4s;
    pointer-events: none;
    z-index: 1; 
  }
  
  .card_3d.disabled:hover .hover_text {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
    pointer-events: auto;
    transition-delay: 0s;
  }

  .card_3d.disabled:hover::after {
    opacity: 0;
  }

  /* Título tarjeta desactivada hover */
  .card_3d.card_3d.disabled:hover .card_title {
    opacity: 0;
  }