#technos a img {
opacity: 0.5;
filter: grayscale(1);
transition: all 0.25s ease-in-out;
}
#technos a:hover img {
opacity: 1;
filter: grayscale(0);
}

.lds-ring {
	display: inline-block;
	position: relative;
	width: 15px;
	height: 15px;
	margin-left: 5px;
  }
  .lds-ring div {
	box-sizing: border-box;
	display: block;
	position: absolute;
	width: 12px;
	height: 12px;
	margin: 2px;
	border: 2px solid #fff;
	border-radius: 50%;
	animation: lds-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
	border-color: #fff transparent transparent transparent;
  }
  .lds-ring div:nth-child(1) {
	animation-delay: -0.45s;
  }
  .lds-ring div:nth-child(2) {
	animation-delay: -0.3s;
  }
  .lds-ring div:nth-child(3) {
	animation-delay: -0.15s;
  }
  @keyframes lds-ring {
	0% {
	  transform: rotate(0deg);
	}
	100% {
	  transform: rotate(360deg);
	}
  }

#backtotop {
position: fixed;
bottom: 20px;
right: 20px;
opacity: 0.25;
}
#backtotop:hover {
opacity: 1;
}