body { 
    background: #ccc; 
    border-top: 3px solid #000 
}
* { 
    font-family: Roboto; 
    color: rgb(39, 39, 39); 
    font-size: 16px;
}
.sec-title{ 
    font-family: Poppins; 
    font-weight: bold;
    color: #000; 
    font-size: 24px;
}
.sec-subtitle{ 
    margin: 35px auto 25px; 
    font-family: Poppins; 
    color: rgb(41, 41, 41); 
    font-size: 18px;
}
.page_wrap {
    margin: 25px auto 25px; 
    border-radius: 3px; 
    background: #FFF; 
    box-shadow: 0 1px 3px rgba(34, 25, 25, 0.4);
    padding-right: 0;
    padding-left: 0;
}
.header_nav {
    background: #f8f8f8; 
    padding: 15px 0 15px 20px; 
}
.img_logo{
    max-height:60px;
    max-width:400px;
}
.footer_menu {
    text-align:center; 
    border-top: 1px dashed #999; 
    margin: 40px 0 0 0; 
    padding: 20px 0
}
.content-survey{
    margin: 25px; 
}
.answers{
    margin-bottom: 50px;
}
.center-parent {
    position: relative;
}
.center-child {
    position: absolute;
    top: 50%;
    left: 50%;
}

.loading {
	z-index: 20;
	position: absolute;
	top: 0;
	left:-5px;
	width: 100%;
	height: 100%;
    background-color: rgba(0,0,0,0.4);
}
.loading-content {
	position: absolute;
	border: 16px solid #f3f3f3; /* Light grey */
	border-top: 16px solid #3498db; /* Blue */
	border-radius: 50%;
	width: 50px;
	height: 50px;
	top: 50%;
	left:50%;
	animation: spin 2s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.answer-image{ 
    cursor: pointer;
}
.answer-image:hover {
    filter: grayscale(0);
  }
.disable-image{
    filter: grayscale(1);
}
.select-image{
    cursor: pointer;
}
.select-image:hover{
    border-style: inset;
    border-color: cadetblue;
}
.selected-image{
    border-style: inset;
    border-color: cadetblue;
}

.fila-seleccionada {
    border: 2px solid #007bff; /* Borde azul para destacar la fila */
}