html{ 
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;

}
.lista1{
  position:static;
  top:10px;
  width:100vW;
  min-height:20px;
  margin-top:2vw;
}
  
.lista1 ul{
  text-align: center;
  border: double;
  background-color: gray;
  width: 600px;
  border-radius: 20px;
  margin:auto;
}

.lista1 ul li{
  display:inline;
  padding-left:15px;
  padding-right: 15px;
  min-height:20px;
}

.lista1 ul li a{
  text-decoration:none;
  color:white;
  font-size: 20px;
}
.lista1 ul li a:hover {
  color:white;
  background-color:black;
  text-decoration: none;
}
/*------------ACTIVIDAD 1-----------------*/
body{
    background-image: url(s1.jpg);
    background-repeat: repeat-Y;
    background-attachment: fixed;
    background-position: center;
    backdrop-filter: brightness(10%);
    position: absolute;
    color: white;
    margin: auto;
    width: 100%;
    height: auto;
}
h1{ 
    text-align: center;
    font-size: 60px;
}
h2{
  text-align: center;
  font-size: 40px;
}

.tabla{
  border-collapse: collapse;
  margin: 25px 0;
  font-size: 0.9em;
  min-width: 400px;
  border-radius: 5px 5px 0 0;
  overflow: hidden;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.15);
  width: 100%;
  border-radius: 12px;
}

.tabla thead tr{
  background-color: #4e4d4d;
  color: white;
  text-align: left;
  font-weight: bold;
}
.tabla th,
.tabla td{
  padding: 12px 15px;
}

.tabla tbody tr{
  border-bottom: 1px solid #dddddd;
}
.tabla tbody tr:nth-of-type(even) {
  background-color: #3f3f3f;
}
.tabla tbody tr:last-of-type {
  border-bottom: 2px solid #4e4d4d;
}
.tabla tbody tr.active-row {
  font-weight: bold;
  color: #4e4d4d;
}
.tabla a {
  color: yellow;
}
/* TABLAS*/
/*
table {
    table-layout: fixed;
    width: 100%;
    border-collapse: collapse;
    border: solid grey;
    border-radius: 10%;
  }
  
thead th:nth-child(1) {
    width: 30%;
  }
  
thead th:nth-child(2) {
    width: 20%;
  }

thead th:nth-child(3) {
    width: 15%;
  }

thead th:nth-child(4) {
    width: 35%;
  }
  
th, td {
    padding: 20px;
  }
th {
    letter-spacing: 2px;
  }
  
  td {
    letter-spacing: 1px;
  }
  
tbody td {
    text-align: center;
  }

tbody tr:nth-child(odd) {
    border-collapse: collapse;
    border: solid grey;
    border-style:outset;
  }
tbody a{
    color: yellow;
}
tbody a:hover{
    color: tomato;

}
/*-------*/
/*
.a1{
    color: red;
    text-decoration: none;
}

*/

/*** ACTIVIDAD NUMERO 2----*/
.pie-pagina:hover
{
  background: yellow;
  color: green;
  font-weigth: bold;
}


.pie-pagina
{
  width: 100%;
  background: #333333;
  border: 1px solid #4e4d4d;
  box-shadow: inset 0 0 10px #000;
  border-radius: 3px;
}
.pie-pagina .grupo-1 
{
  width: 100%;
  max-width: 1200px;
  margin: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 50px;
  padding: 45px 0px;
}
.pie-pagina .grupo-1 .box figure 
{
  width: 40%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.pie-pagina .grupo-1 .box figure img
{
  width: 350px;
}
.pie-pagina .grupo-1 .box h2 
{
  margin-bottom: 25px;
  font-size: 20px;
}

.pie-pagina .grupo-1 .box p
{
  margin-bottom: 10px;
}

.pie-pagina .grupo-1 .red-social a
{
  display: inline-block;
  text-decoration: none;
  width: 45px;
  height: 45px;
  line-height: 45px;
  margin-right: 10px;
  background-color: black;
  text-align: center;
  transition: all 300ms ease;
}
.pie-pagina .grupo-1 .red-social a:hover
{
  color: red;
}
.pie-pagina .grupo-2 
{
  background-color: grey;
  box-shadow: inset 0 0 10px #000;
  padding: 15px 10px;
  text-align: center;
}
.pie-pagina .grupo-2 small
{
  font-size: 15px;
}