/* Reset básico */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: Arial, sans-serif; line-height: 1.6; }

/* Barra superior */
.barra {
  background: #333;
  color: #fff;
  padding: 10px;
  position: sticky; /* uso de position */
  top: 0;
  display: flex;
  align-items: center;
  gap: 20px;
}

.navegador-falso .dot {
  height: 15px;
  width: 15px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 5px;
}
.rojo { background: red; }
.amarillo { background: yellow; }
.verde { background: green; }

/* Layout con flexbox */
.contenedor {
  display: flex;
  min-height: 75vh;
}

/* Columna lateral */
.lateral {
  background: #f4f4f4;
  padding: 20px;
  width: 25%;
}
.lateral h2 {
  margin-top: 20px;
  margin-bottom: 10px;
  border-bottom: 2px solid #ccc;
}
.perfil {
  width: 100%;
  border-radius: 50%;
  margin-bottom: 25px;
}

/* Sección principal */
.principal {
  flex: 1;
  padding: 20px;
}
.principal h2 {
  margin: 20px 0 10px;
  color: #333;
}
.imagenes-extra img {
  width: 48%;
  border: 2px solid #ccc;
}

/* Footer */
.pie {
  background: #222;
  text-align: center;
  padding: 15px;
}
.pie img {
  width: 40px;
  margin: 0 10px;
}