/* Estilos globales */
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
#contenedor{
    margin-top: 56px;
    background-color: red;
    height: 100vh;
  }

#c1, #c2, #c3, #c4 {
    background-color: green;
    border: 1px solid black;
    height: 100vh;
}

#c5{
    background-color: yellow;
    border: 1px solid black;
}