:root {
    --fonts: Inter, 'Open Sans', 'Helvetica', 'Roboto', sans-serif;
    --theme-color: #33e;
    --theme-color-highlight: #55f;
    --theme-color-highlight-2: #99f;
    --theme-color-lowlight: #11b;

    font-family: var(--fonts);
}

body {
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
}

header {
    position: sticky;
    top: 0%;
    width: 100vw;
    height: fit-content;
    background-color: var(--theme-color, gray);
    color: #fff;

    box-shadow: 0 0 20px var(--theme-color-lowlight);
}

header div.logo {
    padding: 1em;
}

header div.logo span {
    font-weight: bolder;
    font-size: 1.5em;

    border: 1px;
}

main {
    display: flex;
    flex-direction: column;
    gap: 1em;
    width: 100vw;
}

main section {
    margin: 0 2.5em;
    width: calc(100vw - (2.5em * 2));

    >h2 {
        text-decoration: underline;
        text-decoration-color: #aaa;
    }
}

section#intro {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    margin: 0;
    width: 100vw;
    background-color: var(--theme-color);
    color: #fff;

    font-size: 2em;

    border-bottom: 3px solid gray;
}

div section {
    width: fit-content;
}

/* --- */

/* for anchors.js */
h2:hover {
    cursor: pointer;

    &::before {
        position: absolute;
        content: '#';
        text-decoration: underline;
        text-decoration-color: var(--theme-color);
        transform: translateX(-150%);
    }
}

/* --- */

pre, 
code, 
.mono {
    font-family: 'Mononoki', 'Droid Sans Mono', monospace;
}

/* --- */

form {
    display: flex;
    flex-direction: column;

    gap: .75em;
    margin: .5em 0;

    padding: 1rem .5rem;
    border: 2px solid #e3e3e3;
    border-radius: 5px;
}


form input,
form textarea {
    font-family: var(--fonts);

    width: 100%;
    padding: .3em .2em;

    outline: none;

    border: 1px solid #e3e3e3;
    border-radius: 5px;


    &:hover {
        background-color: 1px solid var(--theme-color-highlight);
    }

    transition: border .2s ease-in-out;
}

form input[type=button],
form input[type=submit],
button {
    outline: none;
    padding: .3em .5em;
    border: 1px solid #e3e3e3;
    background-color: #eee;
    border-radius: 5px;

    cursor: pointer;

    &:hover {
        background-color: var(--theme-color-highlight-2);
    }

    transition: background-color .2s ease-in-out;
}

div.columns {
    display: flex;

    @media (max-width: 600px) {
        flex-direction: column;
    }
}

div.rows {
    display: flex;
    flex-direction: column;
}

.faded {
    opacity: .2;
}