#formulario {
   position: 50%;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
   background-color: lightgray;
   padding: 10px;
   border: 1px solid gray;
}

input[type="text"],
input[type="email"],
input[type="submit"] {
   display: block;
   margin-bottom: 10px;
   padding: 5px;
   border: 1px solid gray;
   border-radius: 5px;
   width: 100%;
   box-sizing: border-box;
}

.imagenlogo {

   width: 10% !important;
}

table {
   border-collapse: separate;
   border-spacing: 5px;
   background: #000 url("gradient.gif") bottom left repeat-x;
   color: #fff;
   width: 100%;
   border: 2px solid gray;
   /* Bordes externos */
}

thead th {
   background-color: #d3d3d3;
   /* Relleno gris claro para el encabezado */
   color: #000;
   /* Color del texto en el encabezado */
}

tr {
   background: #fff;
   color: #000;
   border-top: 1px solid #000;
   border-left: 1px solid #000;
   border-right: 1px solid #000;
}

tr:not(:last-child) {
   border-bottom: 1px solid gray;
}

td,
th {
   border: 1px solid #000;
}

/* Estilo para sombrear la fila al pasar el mouse */
tr:hover {
   background-color: #f0f0f0;
}


.divider-text {
   position: relative;
   text-align: center;
   margin-top: 15px;
   margin-bottom: 15px;
}

.divider-text span {
   padding: 7px;
   font-size: 12px;
   position: relative;
   z-index: 2;
}

.divider-text:after {
   content: "";
   position: absolute;
   width: 100%;
   border-bottom: 1px solid #ddd;
   top: 55%;
   left: 0;
   z-index: 1;
}

.btn-facebook {
   background-color: #405D9D;
   color: #fff;
}

.btn-twitter {
   background-color: #42AEEC;
   color: #fff;
}

@media only screen and (min-width: 320px) and (max-width: 850px) {
   .imagenlogo {
      display: none !important;
   }

   .container {
      padding-top: 800px;
   }
}