.bg-surface {
    display:none !important;
}

body{
    padding: 0;
    margin: 0;
    overflow-x: hidden;
}

.h15{
    height: 12vh;
    transition: background-color 0.2s ease;
}

.total {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.total video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.db{
  position: absolute; 
  bottom: 0;
}

.tc{
  color: #ffffff;
  opacity: 0.8;
}

.text-nav{
  font-size: 16px;
  transition: 0.2s ease;
  text-align: center;
}

@media (max-width:1400px){
  .text-nav{
    font-size: 15px;
  }
}

@media (max-width:1200px){
  .text-nav{
    font-size: 14px;
  }
  .text-opt{
    font-size: 11px;
  }
}

.text-nav-be{
  color: #fff;
}

/*.text-nav:hover{*/
/*  color: rgb(105, 105, 105);*/
/*}*/

.text-nav-af{
  color: #000000;
}

.text-nav-af:hover{
  color: rgb(152, 150, 150);
}

.cont1:hover .tbg{
  display: block;
}

.cont2:hover .tbg{
  display: block;
}

.cont3:hover .tbg{
  display: block;
}

.cont4:hover .tbg{
  display: block;
}

.cont5:hover .tbg{
  display: block;
}


.text-opt{
  font-size: 14px;
  transition: 0.2s ease;
  text-align: justify;
  font-weight: 300;
  text-decoration: none;
  display: flex;
  justify-content: start;
}



.text-opt-be{
  color:#fff;
      background:  rgba(0, 0, 0, 0.5);
}

.text-opt-af{
  color:#040404;
}

.text-opt-be:hover {
  /*color: rgb(105, 105, 105);*/
  color:#fff;
    background:  rgba(0, 0, 0, 0.3);
}

.text-opt-af:hover {
  color: rgb(152, 150, 150);
}
 
.text-opt-be:hover + .q {
  background: #fff;
  animation-name: aumentar-ancho;
  animation-duration: .5s;
  animation-fill-mode: forwards;
}

.q {
  width: 0vw;
  height: 1px;
}

/*.text-opt-bg-be{*/
/*  background:  rgba(0, 0, 0, 0.3);*/
/*}*/

.text-opt-bg-af{
  background: #fff;
}

.tbg{
  display: none;
}


@keyframes aumentar-ancho {
  from {
    width: 0%;
  }
  to {
    width: 100%;
  }
}

.ta{
  color: #000;
}

.ta:hover{
  color: rgb(181, 181, 181);
}

.text{
  font-style: italic;
  font-weight: 300;
  font-size: 80px;
}

@media (max-width: 1000px){
  .text{
    font-size: 50px !important;
  }
}



.cont-img{
  height: 95vh;
}

@media (max-width:950px) {
    .cont-img{
      height: 80vh;
    }
}

@media (max-width:750px) {
    .cont-img{
      height: 50vh;
    }
}

.img{
  width: 100%;
  height: 100%;
}

b{
  font-size:65px
}

.borde{
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.6);
}


.bg-opt{
  background-size: cover; /* ajusta la imagen para cubrir todo el fondo */
  background-position: center center; /* posición centrada */
  height: 180px;
  width: 100%;
}

.bg-opt-1{
  background-image: url(https://utbinvestigacion.com/img/biblioteca.png);
}
.bg-opt-2{
  background-image: url(https://utbinvestigacion.com/img/repositorio.jpg);
}
.bg-opt-3{
  background-image: url(https://utbinvestigacion.com/img/feria.jpg);
}
.bg-opt-4{
  background-image: url(https://utbinvestigacion.com/img/universidad.jpeg);
}


.bg-opt-text{
  font-size: 65px;
  font-style: italic;
  color: #ffffff;
  display: none;
  background:  rgba(0, 0, 0, 0.3);
  transition: 0.15s ease;

}

.bg-opt-text:hover{
  background:  rgba(0, 0, 0, 0.6);
  color: #ffffff;
}

p{
  color: rgb(83, 83, 83);
}


.bg-footer{
  background:  rgba(0, 0, 0, 0.8);
}

.bt-label{
  border-top: 1px solid #fff;
}


.d-md{
  display: none;
}

.d-sm{
  display: flex;
  position:fixed;
  justify-content: space-between;
  background:  rgba(0, 0, 0, 0.5);
}
@media (max-width: 950px){
  .d-md{
   display: flex;
  }

  .d-sm{
    display: none;
   }
}

.bg-bar-cel{

  background: rgba(0, 0, 0, 0.95);
  position:fixed ;
  z-index:20; 
  height:110vh; 

}

@keyframes bar_cel {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

.d-bar{
  animation-name: bar_cel;
  animation-duration: .5s;
  animation-fill-mode: forwards;
}

@media (min-width:950px) {
  #bar-cel{
    display: none !important;
  }
}


.text-bar-opc{
  color: #fff;
  border-bottom: 1px solid #fff;
  width: 100%;
  transition: .2s ease-in;
}

.text-bar-opc:hover{
  color: #5b5b5b;
  border-bottom: 1px solid #5b5b5b;
}

.btn-nav-cel{
  background: transparent;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  border: none;
}

.btn-li{
  background: transparent;
  color: #fff;
  border: none;
  
}

.nav-cel-li{
  display: flex;
  align-items: center;
}

.cttn-nav-ul{
  width: 100%;
  display: flex;
}

.cttn-visiblent{
  transform: translateX(-200%);
  transition: .5s;
  position: absolute;
}
.cttn-visible{
  transform: translateX(0%);
  transition: .5s;
}

.btn-li:focus {
  outline: none; /* Elimina el resaltado al hacer clic */
}






.anim1, .anim2,.anim3, .anim4, .anim5, .anim6, .anim7, .anim8, .anim9, .anim10, .anim11, .anim12, .anim13, .anim14, .anim15 , .anim16 , .anim17, .anim18, .anim19, .anim20, .anim21, .anim22, .anim23    {
  opacity: 0;
}


.aparecer-izquierda {
  animation: aparecer-izquierda 1s forwards;
}

.aparecer-derecha {
  animation: aparecer-derecha 1s forwards;
}

@keyframes aparecer-izquierda {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes aparecer-derecha {
  0% {
    transform: translateX(100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}


.hover-img:hover .image{
  transform: scale(1.05);
}
.image {
  margin: 1px;
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.ci{
  box-shadow: 3px 3px 3px 3px rgba(0,0,0,0.2);
}