body {
    margin: 0;
    text-align: center;
}
#headertopper {
    width: 100%;
}
nav a {
    color: black;
}

.box {
  border: 2px solid black;
  padding: 20px;
  width: 300px;
  text-align: center;
  margin: 20px;
}

.btn {
    border: 2px solid black;
}

nav {
    display: flex;
    justify-content: space-between;
    border: 2px solid black;
}

.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

img {
    width: 200px;
}

.back {
    text-align: left;
    color: aliceblue;
    height: 500px;
    background-size: cover;
}

.title {
    padding-top: 10%;
     width: 100%;
     justify-content: center;
     text-align: center;
}