@import url(https://fonts.googleapis.com/css?family=Roboto);

html, body {
  font-family: 'Roboto', sans-serif;
  width: 100%;
  min-height: 100vh;
  padding: 0;
  margin: 0;

  --primary-color: #01589B;
}

h1 {
  font-size: 4rem;
  margin: unset;
}

.main {
  height: 100vh;
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
}

.main section {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

header {
  display: flex;
  justify-content: center;
  padding: 1em;
}

header nav {
  background-color: var(--primary-color);
  height: 3em;
  border-radius: 10px;
  overflow: clip;
  display: flex;
  justify-content: space-between;
}

header nav a {
  color: white;
  font-weight: 700;
  text-decoration: none;
  padding-left: 2em;
  padding-right: 2em;
  height: 100%;
  display: flex;
  align-items: center;
}

header nav a:hover {
  background-color: #0005;
}

header nav div.active {
  position: relative;
}

header nav div.active::before {
  content: "";
  display: block;
  height: 2px;
  border-radius: 1px;
  position: absolute;
  left: 20px;
  bottom: 0.5em;
  right: 20px;
  background-color: white;
}

.counter {
  display: flex;
  align-items: center;
  padding-top: 10px;
  padding-bottom: 10px;
  border-top-style: solid;
  border-bottom-style: solid;
  border-top-color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  border-top-width: 1px;
  border-bottom-width: 1px;
}

.counter button {
  font-size: 2rem;
  width: 2em;
  height: 2em;
  border: unset;
  cursor: pointer;
  border-radius: 2em;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: transparent;
}

.counter button:hover {
  background-color: #0001;
}

.counter span {
  padding-left: 2rem;
  padding-right: 2rem;
  box-sizing: border-box;
  min-width: 2.5em;
  color: var(--primary-color);
  font-size: 4rem;
  text-align: center;
}

ol {
  max-width: 500px;
}