* {
    box-sizing: border-box;
}

/* Dark theme */
:root {
    --text-color: #fff;
    --text-color-alt: rgba(255 255 255 / 50%);
    --text-shadow-color: rgba(0 0 0 50%);
    --bg-color: #333;
    --bg-color-2: #222;
}

/* Light Theme */
@media (prefers-color-scheme: light) {
    :root {
        --text-color: #333;
        --text-color-alt: rgba(0 0 0 50%);
        --text-shadow-color: rgba(255 255 255 50%);
        --bg-color: #f7f7f7;
        --bg-color-2: #f7f7f7;
    }
}

:root {
    --underline-color: var(--text-color);
}

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    background-image: radial-gradient(var(--bg-color), var(--bg-color-2));
    color: var(--text-color);
    display: -ms-flexbox;
    display: -webkit-box;
    display: flex;
    -ms-flex-pack: center;
    -webkit-box-pack: center;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;

    /* Always show scroll bar, cause otherwise menu shifts around */
    overflow-y: scroll;

    /* Font list taken from Bootstrap */
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        "Helvetica Neue",
        Arial,
        "Noto Sans",
        sans-serif,
        "Apple Color Emoji",
        "Segoe UI Emoji",
        "Segoe UI Symbol",
        "Noto Color Emoji";
    font-weight: 300;
    text-shadow: 0 0.05rem 0.1rem var(--text-shadow-color);
}

h1,
h2,
h3,
h4 {
    font-weight: 500;
    line-height: 1.2;
    margin-top: 0;
    margin-bottom: 0.5rem;
    padding: 0;
    text-align: center;
}

p.lead {
    margin-top: 0;
}

a {
    border-bottom: 1px solid currentcolor;
    text-decoration: none;
}

a,
a:focus,
a:hover {
    color: var(--text-color);
}

a:hover {
    border-bottom: 2px solid currentcolor;
}

.main-header {
    /* Otherwise the main content header gets too close to the menu */
    margin-bottom: 1rem;
    width: 100%;
}

.main-header nav {
    display: flex;
    flex-direction: row;
    width: 100%;
    justify-content: space-around;
    padding-top: 1rem;
}

.main-header .nav-link {
    display: block;
    font-weight: 700;
    color: var(--text-color-alt);
    background-color: transparent;
    border-bottom: 0.25rem solid transparent;
    text-decoration: none;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.main-header .nav-link:hover {
    border-bottom-color: var(--text-color-alt);
}

.main-header .nav-link:focus,
.main-header .active,
.main-header .active:hover {
    color: var(--text-color);
    border-bottom-color: var(--underline-color);
    outline: 0;
}

#content {
    text-align: center;
    max-width: 40rem;
}

.main-footer {
    margin-top: 1rem;
    color: var(--text-color-alt);
    font-size: 0.9em;
    text-align: center;
}

.main-footer a:not(:hover) {
    color: var(--text-color-alt);
    border-bottom: none;
}

.skills {
    display: grid;
    grid-template-columns: 1fr;
}

.skillgroup {
    max-width: 20rem;
    margin: 0 auto;
    margin-bottom: 0.5rem;
}

.skillgroup ul {
    padding: 0 0.5rem;
}

.projects {
    text-align: center;
    padding: 0;
}

.projects h3 {
    margin-bottom: 0;
}

.projects li {
    list-style: none;
    margin-bottom: 2.5rem;
    text-align: center;
}

.project-links {
    font-style: italic;
    text-align: center;
    margin-top: 0.15rem;
    margin-bottom: 0.5rem;
    font-size: 0.75rem;
}

.marginizer {
    margin-top: 3rem;
    margin-bottom: 3rem;
}

@media (min-width: 40rem) {
    .main-header .nav-link {
        padding-right: 1rem;
        padding-left: 1rem;
        display: inline;
    }

    .main-header nav {
        display: block;
    }

    .main-header {
        width: auto;
    }

    .skills {
        grid-template-columns: 1fr 1fr;
    }
}