.logo {
  max-width: 100%;
  height: auto;
}
  
header {
    background: #ffecb3;
    padding: 1%;
    margin: 10px;
    display: flex;
    justify-content: center;
  }  


article {
    background: #99ddff;
    font-size: 16px;
    margin: 10px;
    padding: 10px;
}

.container {
   display: flex;
}
.container div {
   flex: 1;
}

  li {
    list-style-type: square;
  }

  footer {
    background: #ffecb3;
    padding: 1%;
    margin: 10px;
  }