* {
  margin: 0;
  padding: 0;
}
header, footer {
  margin: 20px; 
  border-radius: 10px;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f4f6fb;
  color: #222;
}

header {
  background: #2d3e50;
  color: #fff;
  padding: 40px 40px;
  display: flex;
  justify-content: space-between;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
}

header nav ul li {
  list-style: none;
  gap: 20px;
  margin: 0;
  padding: 3px;
  margin-top: 10px;
  display: inline;
}

header nav a {
  color: #ffd700;
}

header nav a:hover {
  color: #fff;
}

iframe {
  width: 700px;
  height: 396px;
  margin-left: auto;
  margin-right: auto;
}
aside {
  background: #32465a;
  color: #fff;
  float: right;
  width: 20%;
  margin-right: 20px;
  margin-left: 20px;
  padding: 20px;
  margin-top: 0px;
  margin-bottom: 20px;
}
aside iframe {
  width: 100%;
  height: 300px;
}
aside h2{
  
  text-align: center;
  margin-bottom: 10px;
  font-family: Arial, Helvetica, sans-serif;
}

h2 {
  text-align: left;
  margin-bottom: 3%;
  font-family: Arial, Helvetica, sans-serif;
  margin-left: 17px;
  margin-top: 17px;
}

p{
  text-align: left;
  margin-bottom: 3%;  
  font-size: 1rem;
  margin-left: 17px;
  margin-top: 17px;
}

main { 
  margin-right: 20px;
  margin-left: 20px;
  padding: 20px;
  background: #fff;
  border-radius: 10px;
  margin-top: 20px;
  margin-bottom: 20px;
}

footer {
  background: #2d3e50;
  color: #fff;
  padding: 18px 0;
  font-size: 1rem;
  margin-top: auto;
  justify-content: center;  
}

footer a {
  color: #ffd700;
}

footer a:hover {
  color: #fff;
}
footer p {
  margin: 0;
  text-align: center;
}
.tawlogo { 
	font-family: arial, sans-serif; 
	border: 1px solid #555; 
	vertical-align: 0.3em;
	font-weight: bold;
	color: #fff;
	font-size: 0.9em; 
	background-color: #555;
	padding: 0;
}

.tawlogo .tnivel {
	padding: 0 0.4em ;
	border-bottom: 0px;
	background-color: #555;
	color: #fff;
	font-size: 0.8em;
}

.tawlogo abbr {
	border-bottom: 0px;
}

.tawlogo acronym{
	border-bottom: 0px;
	padding: 0 0.3em;
	background-color: #fff;
	color: #000; 
}

.tawlogo sup{
	padding: 0em;
	vertical-align: 0.6em;
	font-size: 0.6em;
}
.tawlogo .rojo {
  color: rgb(255, 0, 0);
  background-color: #555;
}
.tawlogo .naranja {
  color: rgb(220, 131, 16);
  background-color: #555;
}
.tawlogo .verde {
  color: rgb(0, 170, 0);
  background-color: #555;
}