body {
  font-family: "Lucida Sans", "Lucida Sans Regular", "Lucida Grande",
    "Lucida Sans Unicode", Geneva, Verdana, sans-serif;
  margin: 0;
  background-color: #b8e4f0;
  text-align: center;
}

header {
  background-color: #7267cb;
  padding: 1rem;
  font-size: large;
  text-align: center;
  margin-bottom: 2.5rem;
}
.angle1,
.angle2,
.angle3 {
  display: block;
  margin: auto;
  width: 65%;
  height: 2rem;
}

.input-container {
  border: 4px solid #98bae7;
  padding: 2.5rem;
  width: 60%;
  margin: auto;
  text-align: center;
}

.check-button {
  padding: 1.1rem 3.5rem;
  border-radius: 0.6rem;
  font-weight: bold;
  font-size: 1.2rem;
  background-color: #98bae7;
}

.header-items {
  display: inline;
}

.header-items a {
  color: #98bae7;
  text-decoration: none;
  padding: 1rem;
}