* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  font-family: sans-serif;
  color: #444;
}
nav {
  font-weight: bold;
  font-size: 50px;
  background-color: #1098ad;
  margin-bottom: 50px;
}
.header-section {
  text-align: center;
  margin-bottom: 40px;
}
.about-section {
  text-align: center;
  margin-bottom: 40px;
}
.skillstools-section {
  text-align: center;
}