body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-image: url(fondo.jpg); 
}

h1, h2, h3 {
  margin: 0;
}

p {
  line-height: 1.4;
}


.cabecera {
  text-align: center;
  padding: 20px;
  border-bottom: 2px black;
}

.logo-titulo {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

.logo {
  width: 70px;
  height: 70px;
  border-radius: 50%; 
  background-color: #009fe3;
}

.cabecera h1 {
  font-size: 2rem;
  color: #007acc;
}

.autor {
  font-size: 0.8rem;
  color: #555;
}


.definiciones {
  margin: 20px auto;
  max-width: 900px;
  padding: 20px;
  border: 2px solid black;
  border-radius: 5px;
}

.definiciones h2 {
  margin-bottom: 10px;
  text-align: left;
}

.definiciones p {
  margin-bottom: 20px;
  font-size: 0.95rem;
}


.cards {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.card {
  flex: 1;
  min-width: 250px;
  padding: 15px;
  border: 2px solid black;
  border-radius: 5px;
  text-align: center;

}

.card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.card p {
  font-size: 0.9rem;
  text-align: left;
}

.card .icono {
  display: block;
  width: 70px;
  margin: 10px auto;
}


.card.html {
  background: #fbeaea;
  border-color: black;
}
.card.css {
  background: #eaf3fb;
  border-color: black;
}
.card.js {
  background: #f1fbe7;
  border-color: black;
}


.analogia {
  margin: 20px auto;
  max-width: 900px;
  padding: 20px;
  border: 2px solid black;
  border-radius: 5px;
}

.analogia h2 {
  margin-bottom: 10px;
}

.tabla {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.col {
  flex: 1;
  min-width: 250px;
  padding: 15px;
  border: 2px solid black;
  border-radius: 5px;
  background: #fdfdfd;
}

.col h3 {
  margin-top: 0;
  text-align: left;
  color: #fff;
  padding: 5px;
  border-radius: 3px;
}

.col.html h3 {
  background: #e66049;
}
.col.css h3 {
  background: #009fe3;
}
.col.js h3 {
  background: #87b94e;
}

.col p {
  font-size: 0.9rem;
}


.iconos-web {
  margin: 20px auto;
  max-width: 900px;
  padding: 20px;
  border: 2px solid #aaa;
  border-radius: 5px;
  
}

.contenedor-iconos {
  display: flex;
  justify-content: space-around;
  gap: 15px;
}

.icono-web {
  text-align: center;
}


.resumen {
  background: rgba(255, 255, 255, 0.8);
  margin: 20px auto;
  max-width: 900px;
  padding: 20px;
  border: 2px solid #aaa;
  border-radius: 5px;
  text-align: center;
  box-shadow: 10px 10px 8px black;
}

.resumen hr {
  border: none;
  margin-bottom: 15px;
}

blockquote {
  font-style: italic;
  color: #333;
  margin: 0;
}

img{
       display:block;
       margin:auto;
}