* {
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, Helvetica, sans-serif;
}

header {
  display: flex;
  justify-content: space-between;
  background: darkred;
}

header a {
  color: whitesmoke;
  text-decoration: none;
  padding: 15px;
}
header a:hover {
  background: #ddd;
  color: darkred;
}
.logo {
  display: flex;
}
article {
  padding: 15px;
  width: 50%;
  margin: 0 auto;
  flex-wrap: wrap;
  display: flex;
}
.img {
  width: 30%;
  margin: 30px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.topnav {
  display: flex;
  width: 400px;
  justify-content: space-between;
}

.icon {
  display: none;
}

.container {
  display: flex;
  flex-wrap: wrap;
  margin: 0 auto;
}

.container article {
  width: 50%;
  margin: 1%;
}

@media screen and (max-width: 670px) {
  .container {
    display: flex;
    flex-wrap: wrap;
    margin: 0 auto;
  }

  .container article {
    width: 85%;
  }
  h1 {
    padding: 10px;
  }
  .topnav a {
    display: none;
  }
  .topnav .icon {
    display: block;
    position: absolute;
    right: 0;
    top: 0;
  }
  .responsive a {
    display: block;
  }
  .responsive {
    flex-direction: column;
    padding-top: 40px;
    width: 100%;
    align-items: center;
  }

  .img {
    width: 90%;
  }
}