@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;
}