/* Variables *****************************************************************/

$switch-small-screen: "only screen and (max-width: 600px)";
$switch-smaller-screen: "only screen and (max-width: 400px)";

$navbar-height: 70px;
$postamble-height: 55px;

$tooltip-underline-size: 3px;

// Themes /////////////////////////////////////////////////////////////////////

$dark:                         rgba( 52,  73,  94, 1);
$black:                        rgba(  0,   0,   0, 1);
$accent1:                      rgba( 93, 115, 126, 1);
$accent2:                      rgba( 92, 172, 126, 1);
$accent3:                      rgba(197, 193, 155, 1);
$light:                        #eee;
$grey1:                        #f8f8f8;
$grey2:                        #dbe1e8;
$grey3:                        #b2becd;
$grey4:                        #6c7983;
$grey5:                        #454e56;
$grey6:                        #12181b;

// Accent 1
//   Black
$gradient-accent1-black-left:  linear-gradient(to left,  $black,  $accent1,  $accent1);
$gradient-accent1-black-right: linear-gradient(to right, $black,  $accent1,  $accent1);
//   Dark
$gradient-accent1-dark-left:   linear-gradient(to left,  $dark,   $accent1);
$gradient-accent1-dark-right:  linear-gradient(to right, $dark,   $accent1);
//   Light
$gradient-accent1-light-left:  linear-gradient(to left,  $light,  $accent1);
$gradient-accent1-light-right: linear-gradient(to right, $light,  $accent1);
// Accent 2
//   Black
$gradient-accent2-black-left:  linear-gradient(to left,  $black,  $accent2,  $accent2);
$gradient-accent2-black-right: linear-gradient(to right, $black,  $accent2,  $accent2);
//   Dark
$gradient-accent2-dark-left:   linear-gradient(to left,  $dark,   $accent2);
$gradient-accent2-dark-right:  linear-gradient(to right, $dark,   $accent2);
//   Light
$gradient-accent2-light-left:  linear-gradient(to left,  $light,  $accent2);
$gradient-accent2-light-right: linear-gradient(to right, $light,  $accent2);
// Accent 3
//   Black
$gradient-accent3-black-left:  linear-gradient(to left,  $black,  $accent3,  $accent3);
$gradient-accent3-black-right: linear-gradient(to right, $black,  $accent3,  $accent3);
//   Dark
$gradient-accent3-dark-left:   linear-gradient(to left,  $dark,   $accent3);
$gradient-accent3-dark-right:  linear-gradient(to right, $dark,   $accent3);
//   Light
$gradient-accent3-light-left:  linear-gradient(to left,  $light,  $accent3);
$gradient-accent3-light-right: linear-gradient(to right, $light,  $accent3);

.light {
    $bg-nav: $gradient-accent3-light-right;
    $border-color: $accent1;

    color: $dark;
    background: $light;

    transition: background 500ms ease-in-out, color 1s ease-in-out;

    pre {
        box-shadow: 3px 5px $dark;
        border-color: $light;
    }

    pre.src {
        &::before {
            background-color: $light;
            color: $dark;
        }
    }

    .navbar, header {
        background: $bg-nav;
    }

    .navbar svg {
        fill: $dark;
    }

    .status {
        background: $gradient-accent3-light-left;
        color: $dark;
    }

    .tooltip {
        border-bottom: $tooltip-underline-size dotted $accent3;

        .tooltiptext {
            background-color: $accent3;
            color: $dark;

            &::after {
                border-color: $accent3 transparent transparent transparent;
            }
        }
    }

    .dropdown {
        background: $accent3;
        color: $dark;
    }

    #content {
        a {
            box-shadow: inset 0 -3px 0 $accent3;
            transition: box-shadow 300ms ease-in-out;

            &:hover {
                box-shadow: inset 0 -23px 0 $accent3;
                transition: box-shadow 300ms ease-in-out;
            }
        }
    }

    table, th, td {
        border: 1px solid $dark;
    }

    th {
        background: darken($light, 5%);
    }

    .gentree {
        filter: invert(0%);
        transition: filter 1s ease-in-out;
    }
}

.dark, .black {
    $bg-nav: $gradient-accent2-dark-right;
    $border-color: $dark;

    color: $light;
    background: $dark;

    transition: background 500ms ease-in-out, color 1s ease-in-out;

    pre {
        box-shadow: 3px 3px $dark;
        border: none;
    }

    pre.src {
        &::before {
            background-color: $dark;
            color: $light;
        }
    }

    .navbar, header {
        background: $bg-nav;
    }

    .navbar svg {
        fill: $light;
    }

    .status {
        background: $gradient-accent2-dark-left;
        color: $light;
    }

    .tooltip {
        border-bottom: $tooltip-underline-size dotted $accent1;

        .tooltiptext {
            background-color: $accent1;
            color: $light;

            &::after {
                border-color: $accent1 transparent transparent transparent;
            }
        }
    }

    .dropdown {
        background: $dark;
        color: $light;
    }

    #content {
        a {
            box-shadow: inset 0 -3px 0 $accent2;
            transition: box-shadow 300ms ease-in-out;

            &:hover {
                box-shadow: inset 0 -23px 0 $accent2;
                transition: box-shadow 300ms ease-in-out;
            }
        }
    }

    table, th, td {
        border: 1px solid $accent1;
    }

    th {
        background: darken($dark, 2.5%);
    }

    .gentree {
        filter: invert(100%);
        transition: filter 1s ease-in-out;
    }
}

.black {
    $bg-nav: $gradient-accent1-black-right;

    background: $black;

    pre {
        box-shadow: 3px 3px $light;
        border: none;
    }

    pre.src {
        &::before {
            background-color: $black;
            color: $light;
        }
    }

    .navbar, header {
        background: $bg-nav;
    }

    .status {
        background: $gradient-accent1-black-left;
    }

    .dropdown {
        background: $dark;
        color: $light;
    }

    #content {
        a {
            box-shadow: inset 0 -3px 0 $accent1;
            transition: box-shadow 300ms ease-in-out;

            &:hover {
                box-shadow: inset 0 -23px 0 $accent1;
                transition: box-shadow 300ms ease-in-out;
            }
        }
    }

    table, th, td {
        border: 1px solid $light;
    }

    th {
        background: lighten($black, 15%);
    }
}

/* Style *********************************************************************/

* {
    outline: none;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: "Lato", "proxima-nova", Arial, sans-serif;
    font-size: 1.2em;

    transition: background 500ms ease-in-out, color 1s ease-in-out;

    header, .navbar {
        transition: background 500ms ease-in-out, color 1s ease-in-out;
        ul {
            list-style-type: none;
            margin: 0;
            padding: 0;
        }
    }
}

a {
    color: currentColor;
    text-decoration: none;
}

.navbar {
    position: fixed;
    top: 0;
    z-index: 4;
    height: $navbar-height;
    width: 100%;
}

.navbar-nav {
    display: flex;
    align-items: center;
    justify-content: space-evenly;
    height: 100%;
}

header {
    padding: 1em;
    margin-top: $navbar-height;
    margin-bottom: 1em;
    padding-bottom: 6em;
    text-align: center;
    clip-path: polygon(50% 0%, 100% 0, 100% 80%, 50% 100%, 0 80%, 0 0);
    transition: background 500ms ease-in-out;

    .title {
        font-size: 5em;
        margin: 0;
        @media #{$switch-small-screen} {
            font-size: 3em;
        }
    }

    .subtitle {
        font-size: 1.2em;
    }
}

.dropdown {
    position: absolute;
    opacity: 0;
    z-index: -1;

    border-bottom-right-radius: 8px;
    border-bottom-left-radius: 8px;

    display: flex;
    align-items: center;
    justify-content: space-around;
    min-height: 3rem;
    margin-top: 1rem;
    padding: 0.5rem;
    top: 0;

    box-shadow: rgba(2, 8, 20, 0.1) 0px 0.175em 0.5em;
    transform: translateX(-40%);

    transition: opacity 500ms ease-in-out, top 500ms ease-in-out, height 500ms ease-in-out;
}

.has-dropdown {
    &:focus-within {
        .dropdown {
            opacity: 1;
            top: $navbar-height;
            z-index: 5;
            pointer-events: auto;
        }

        #table-of-contents, #drop-page {
            top: $navbar-height / 1.3;
            opacity: 1;
            z-index: 5;
            height: 500%;
            pointer-events: auto;
        }
    }
}

#theme-dropdown {
    width: 150px;
    flex-direction: row;
    transform: translateX(-75%);
}

#lightBtn, #darkBtn, #blackBtn {
    content: ' ';
    border: 2px solid white;
    border-radius: 50%;
    width: 1rem;
    height: 1rem;
    display: inline-block;
    vertical-align: middle;
    margin-right: 10px;
}

#lightBtn {
    background: $light;
}

#darkBtn {
    background: $dark;
}

#blackBtn {
    background: $black;
}

#drop-page, #table-of-contents {
    flex-direction: column;

    transform: translateX(-45%);
    top: -40px;

    height: 0;
    min-width: 300px;
    overflow-y: auto;

    font-size: 0.9em;
}

@media #{$switch-small-screen} {
    #drop-page {
        transform: translateX(-27.5%);
    }
}

#drop-share, #drop-page {
    li {
        padding: 10px;
    }
}

.dropdown-item {
    cursor: pointer;

    a {
        width: 100%;
        height: 100%;
        padding-left: 10px;
        padding-right: 10px;
        font-weight: bold;
    }
}

#table-of-contents {
    padding: 20px;
    float: right;
    width: 75%;
    transition: height 500ms ease-in-out, opacity 500ms ease-in-out, top 500ms ease-in-out;

    li {
        padding: 5px 0;
    }

    h2 {
        font-size: 1.2em;
    }

    #text-table-of-contents {
        height: 100%;
    }
}

#content {
    padding: 50px;
    padding-top: 0;
    max-width: 1000px;
    margin: 0 auto;
    text-align: justify;

    @media #{$switch-small-screen} {
        padding: 50px 20px;
    }

    a {
        font-style: italic;
    }
}

#postamble {
    display: grid;
    grid-template-areas: 'author email date';

    @media #{$switch-small-screen} {
        grid-template-areas: 'author date' 'email email';
    }

    @media #{$switch-smaller-screen} {
        grid-template-areas: 'author' 'date' 'email';
    }

    font-size: 0.8em;
    align-content: space-evenly;
    text-align: center;

    p {
        margin: 10px 0;
    }

    .author {
        grid-area: author;
    }

    .email {
        grid-area: email;
    }

    .date {
        grid-area: date;
    }
}

h1, h2, h3, h4, h5, h6 {
    text-align: center;
}

h2 {
    font-size: 2.5em;
    @media #{$switch-small-screen} {
        font-size: 1.75em;
    }
}

h3 {
    font-size: 2em;

    @media #{$switch-small-screen} {
        font-size: 1.5em;
    }
}

h4 {
    font-size: 1.5em;

    @media #{$switch-small-screen} {
        font-size: 1.3em;
    }
}

h5 {
    font-size: 1.25em;

    @media #{$switch-small-screen} {
        font-size: 1.2em;
    }
}

.tooltip {
    position: relative;
    display: inline-block;

    .tooltiptext {
        visibility: hidden;

        margin-left: -20px;
        bottom: 100%;
        left: 10%;
        padding: 5px 10px;
        text-align: center;
        border-radius: 6px;

        position: absolute;
        z-index: 5;

        &::after {
            content: " ";
            position: absolute;
            top: 100%; /* At the bottom of the tooltip */
            left: 50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
        }
    }

    &:hover {
        .tooltiptext {
            visibility: visible;
        }
    }
}

blockquote {
    padding: 0;
    margin: 20px;
    font-style: italic;
}

.largetable {
    overflow-y: auto;
    margin-top:20px;
    margin-bottom: 20px;
}

table {
    margin: 0 auto;
}

th, td {
    white-space: nowrap;
    padding: 10px;
}

img {
    max-height: 600px;
    max-width: 100%;
}

.nav-icon {
    max-width: 20px;
    max-height: 20px;
}

.figure {
    padding: 0;
}

ul {
    padding-inline-start: 20px;
}

pre.src {
    background: $dark;
    color: $light;
    overflow-y: auto;
}