* {box-sizing: border-box;}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: #fff2e6;
}

li {
  padding-top: 3px;
  padding-bottom: 3px;
}

.header {
  overflow: hidden;
  background-color: #ffb366;
  padding: 2px 10px;
  display: flex;
  justify-content: space-between;
}

.header img {
  border-radius: 50%;
  width: 75px
}

.header a {
  float: left;
  color: black;
  text-align: center;
  padding: 12px;
  text-decoration: none;
  font-size: 18px;
  line-height: 25px;
  border-radius: 4px;
}

.header a.logo {
  font-size: 25px;
  font-weight: bold;
}

.header a:hover {
  background-color: #ddd;
  color: black;
}

.header a.active {
  background-color: dodgerblue;
  color: white;
}

.header-right {
  float: right;
  align-self: flex-end;
}

@media screen and (max-width: 500px) {
  .header a {
    float: none;
    display: block;
    text-align: left;
  }

  .header-right {
    float: none;
    align-self: flex-end;

  }
}

/* Style the button that is used to open and close the collapsible content */
.collapsible {
  background-color: #ffb366;
  color: black;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

/* Add a background color to the button if it is clicked on (add the .active class with JS), and when you move the mouse over it (hover) */
.active, .collapsible:hover {
  background-color: #ffb366;
}

/* Style the collapsible content. Note: hidden by default */
.content {
  padding: 0 18px;
  display: none;
  overflow: hidden;
  background-color: #fff2e6;
}

/* Container for flexboxes */
section {
  display: -webkit-flex;
  display: flex;
}
/* Style the content */
article {
  -webkit-flex: 3;
  -ms-flex: 3;
  flex: 3;
  background-color: #fff2e6;
  padding: 15px;
}

/* Style the navigation menu */
nav {
  -webkit-flex: 1;
  -ms-flex: 1;
  flex: .6;
  background: #ddd;
  padding: 20px;
}

/* Style the list inside the menu */
nav ul {
  list-style-type: none;
  padding: 0;
}

nav li {
  margin-bottom: 10px;
}