* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  min-height: 100vh; 
}

.navbar {
  background-color: white;
  color: black;
  border: 1px solid black;
  text-align: center;
  width: 100%;
  padding: 20px;
  display: flex;
  justify-content: space-around;
}


.container-fluid {
  flex: 1;
  width: 100%;
}

.contenido-principal {
  background-color: white;
  border: 1px solid black;
  color: black;
  padding: 20px;
  min-height: 100vh;
}

.cuadrado-costado {
  background-color: white;
  border: 1px solid black;
  padding: 20px;
  color: black;
}

.footer {
  background-color: black;
  color: aliceblue;
  text-align: center;
  padding: 15px;
  width: 100%;
}

.row {
  margin: 0 !important;
}