/* Generic */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700;900&display=swap');

* {
    box-sizing: border-box;
    font-family: Inter, -apple-system, Roboto, 'Open Sans', system-ui, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
}

body, html {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

:root {
    --white: #fff;
    --gray-100: #eee;
    --gray-200: #ddd;
    --gray-300: #ccc;
    --gray-400: #bbb;
    --gray-500: #aaa;
    --gray-600: #999;
    --gray-700: #888;
    --gray-800: #777;
    --gray-900: #666;
}

/* hr */
hr {
    all: unset;
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--gray-800);
}

/* icon */
.icon {
    height: 1.5em;
    display: inline;
    vertical-align: bottom;
    user-select: none;
}

/* Header */

header {
    display: flex;
    background-color: var(--gray-100);
    height: 180px;
    justify-content: center;
}

header img {
    height: calc(180px - 4em);
    width: auto;
    border-radius: 12.5%;
}

header > * {
    padding: 2em;
}

header .section-text h1 {
    line-height: 25%;
}

/* main */

main {
    width: 100%;
    height: 100%;
    background-color: var(--gray-100);
    padding: .5em 0;
    text-align: center;
}

/* nav */

nav {
    padding: 1em 0;
    width: 100%;
    background-color: var(--gray-100);
}

nav ul {
    all: unset;
    list-style: none;
    display: flex;
    justify-content: space-around;
    width: 100%;
}

nav a {
    all: unset;
    cursor: pointer;
    padding: 10px 1em;
}

nav a:hover {
    color: blue;
    text-decoration: underline;
}

/* section */

section {
    padding: 0 5%;
}

section h1 {
    font-size: 2em;
}

section ul {
    list-style: none;
    columns: 2;
}

section li, section a {
    width: 100%;
    display: block;
}

section li {
    padding: .5em;
}

section a {
    cursor: pointer;
    font-size: 1.2em;
    text-decoration: none;
    color: black;
    border-bottom: 2px solid transparent;
}

section a:hover {
    color: blue;
    border-bottom: 2px solid blue;
}

@media (max-width: 710px) {
    nav, .nav-hr {
        display: none;
    }

    section ul {
        columns: 1;
    }
}