* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: #f4f4f4;
  overflow-x: hidden;
}
.nav-container .navbar {
  display: flex;
  align-items: center;
  height: 80px;
  overflow: hidden;
  background-color: #3b5998;
  padding: 0 15px;
}
.nav-container .navbar a {
  color: #f2f2f2;
  text-decoration: none;
  font-size: 17px;
  padding: 14px 16px;
}
.nav-container .navbar a:hover {
  background-color: #ddd;
  color: #000;
}
.nav-container .navbar ul {
  list-style: none;
}
.nav-container .navbar ul li {
  display: inline-block;
}

/* side nav */
.side-nav {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 10;
  inset: 0;
  background-color: #111;
  opacity: 0.9;
  overflow-x: hidden;
  padding-top: 60px;
  transition: 0.5s;
  display: flex;
  flex-direction: column;
}
.side-nav a {
  padding: 10px 10px 10px 30px;
  text-decoration: none;
  font-size: 22px;
  color: #ccc;
  display: block;
  transition: 0.3s;
}
.side-nav a:hover {
  color: #fff;
}
.side-nav a:first-child {
  margin-left: auto;
  font-size: 32px;
  padding: 10px 30px 10px 10px;
}
/* main */
#main {
  transition: margin-left 0.5s;
  padding: 20px;
  overflow: hidden;
  width: 100%;
}

/* media query */
@media (max-width: 786px) {
  .nav-container .navbar ul {
    display: none;
  }
}