@use 'sass:map';

$fonts: (
    ('Lora', 'Lora-Medium', 500, normal),
    ('Inconsolata', 'Inconsolata-Regular', 400, normal),
    ('STIX Two Math', 'STIXTwoMath-Regular', 400, normal),
    ('CormorantGaramond', 'CormorantGaramond-Medium', 600, normal),
    ('CormorantGaramond', 'CormorantGaramond-Bold', 700, normal),
    ('CormorantGaramond', 'CormorantGaramond-MediumItalic', 700, italic),
);

$breakpoints: (
    'mobile': 768px,
    'toc': 1250px
);

/* text color, background color (hex) */
$isa: (
    ("info", #00529b, #bde5f8),
    ("success", #4f8a10, #dff2bf),
    ("warning", #9f6000, #fad776),
    ("error", #d8000c, #feebe3)
);

@each $family, $file, $weight, $style in $fonts {
    @font-face {
        font-family: '#{$family}';
        font-style: $style;
        font-weight: $weight;
        src: url('/fonts/#{$file}.woff2') format('woff2');
        font-display: swap;
    }
}

@each $name, $textcolor, $bgcolor in $isa {
    .isa_#{$name} {
        color: $textcolor;
        background-color: $bgcolor;
        width: 90%;
        margin: 10px 0;
        padding: 12px;
    }
}

@mixin custom-scrollbar {
    scrollbar-width: thin;
    scrollbar-color: color-mix(in srgb, var(--accent) 50%, transparent) color-mix(in srgb, var(--accent) 8%, transparent);

    &::-webkit-scrollbar {
        height: 6px; 
        width: 6px;  
    }

    &::-webkit-scrollbar-track {
        background: color-mix(in srgb, var(--accent) 8%, transparent); 
        border-radius: 4px;
    }

    &::-webkit-scrollbar-thumb {
        background-color: color-mix(in srgb, var(--accent) 50%, transparent);
        border-radius: 4px;
        
        &:hover {
            background-color: var(--accent);
        }
    }
}

@mixin horizontal-scroll {
    display: block;
    overflow-x: auto;
}

@mixin bp($name) {
  $value: map.get($breakpoints, $name);

  @if $value {
    @media (max-width: $value) {
      @content;
    }
  } @else {
    @error "Screen size '#{$name}' is not defined in the $breakpoints map.";
  }
}

@function accent_rgba($aval) { @return rgb(from var(--accent) r g b / $aval); }

:root {
    --bg-main: #FBF8F1;
    --text-main: #4A3F35;
    --text-highlight: #ffe066;
    --accent: #D4A373;
    --toc-bg: #F2EFE7;
    --link-color: #B0413E;

    --code-bg: #1e1e2e;
    --code-text: #cdd6f4;
    --code-radius: 6px;

    --font-serif: "Lora", serif;
    --font-mono: "Inconsolata", monospace;
    --font-header: "CormorantGaramond", serif;
    --font-math: "STIX Two Math",'Latin Modern Math', serif;
}

::selection {
    color: var(--text-main);
    background: var(--text-highlight);
}

*, *::before, *::after {
    box-sizing: border-box;
}

/* scrollbar */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track { background: var(--bg-main); }

::-webkit-scrollbar-thumb {
    background-color: color-mix(in srgb, var(--accent) 60%, var(--bg-main));
    border-radius: 8px;
    border: 3px solid var(--bg-main); 

    &:hover {
        background-color: var(--accent);
    }
}

html {
    scrollbar-color: color-mix(in srgb, var(--accent) 60%, var(--bg-main)) var(--bg-main);
    scrollbar-width: thin;
}

body {
    background:
        radial-gradient(rgba(0,0,0,0.02) 1px, transparent 1px),
        var(--bg-main);
    background-size: 6px 6px;
    margin: 0;
    padding: 0;
    padding-left: 250px;
    
    color: var(--text-main);
    font-family: var(--font-serif), serif;
    font-size: 18px;
    line-height: 1.75;
    font-weight: 500;
    font-variant-ligatures: common-ligatures;
    min-height: 100vh;

    -webkit-font-smoothing: antialiased;

    @include bp('toc') {
        padding-left: 0;
        font-size: 20px; 
    }
}

main, header, footer {
    width: 100%;
    max-width: 85ch;
    padding: 1rem 20px;
    margin: 0 auto;
}

h1, h2, h3 { line-height: 1.2; font-family: var(--font-header), serif; }
h4, h5, h6 { font-family: var(--font-mono), monospace; line-height: 1.3; margin-top: 1.5rem; margin-bottom: 0.5rem; }

h1, h2 {
    padding-bottom: 8px;
    margin-top: 2.5rem;
    letter-spacing: -0.01em;
    position: relative;
}

h1 {
    font-size: 2.3rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
    font-weight: 600;
    letter-spacing: 0;
    line-height: 1.3;
}

h2 {
    font-size: 1.6rem;
    margin-top: 2.5rem;
    margin-bottom: 0.6rem;

    @include bp('mobile') { font-size: 1.5rem; }
}

h3 { font-size: 1.25rem; font-weight: 700; margin-top: 2rem; margin-bottom: 0.4rem; letter-spacing: 0.02em; }
h4 { font-size: 1.1rem; font-weight: 700; color: var(--text-main); }
h5 { font-size: 1rem; font-weight: 700; color: var(--link-color); }
h6 { font-size: 0.85rem; font-weight: 400; text-transform: uppercase; letter-spacing: 1px; color: color-mix(in srgb, var(--text-main) 60%, transparent); }

p, ul, ol { margin-top: 1rem; margin-bottom: 1rem; }
li { margin-top: 0.3rem; }

a, .org-link {
    color: var(--link-color);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
    transition: all 0.2s ease-in-out;

    &:hover {
        color: color-mix(in srgb, var(--link-color) 80%, black); 
        text-decoration-thickness: 4px;
    }
}

dl {
    margin: 1.5rem 0 2rem 0;
}

dt {
    margin-top: 1rem;
    font-family: var(--font-mono), monospace;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: color-mix(in srgb, var(--text-main) 80%, transparent);
}

dd {
    margin: 0.3rem 0 0 1.5rem;
    color: var(--text-main);
}

table {
    display: block;
    table-layout: fixed;
    width: 100%;

    margin: 2rem 0;
    font-size: 0.95rem;
    line-height: 1.5;
    background: color-mix(in srgb, var(--accent) 4%, var(--bg-main));
    @include horizontal-scroll;
    @include custom-scrollbar;
}

th, td {
    padding: 0.75rem 0.9rem;
    text-align: left;
    vertical-align: top;
}

thead th {
    font-family: var(--font-mono), monospace;
    font-size: 0.78rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: color-mix(in srgb, var(--accent) 10%, var(--bg-main));
    border-bottom: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
}

tbody tr + tr td {
    border-top: 1px solid color-mix(in srgb, var(--text-main) 8%, transparent);
}

figure {
    margin: 2rem auto;
    text-align: center;
}

figcaption {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: color-mix(in srgb, var(--text-main) 80%, gray);
    margin-top: 0.5rem;
}

img {
    border-radius: 10px;
    display: block;
    margin: 2rem auto;
    max-width: 50%;
    width: auto;
    height: auto;
    @include bp('mobile') { max-width: 100%; }
}

/* inline code blocks */
:not(pre) > code {
    font-family: var(--font-mono), monospace;
    background: var(--code-bg);
    color: var(--code-text);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.85em;
    white-space: pre-wrap;
    word-break: break-word;
}

pre {
    font-family: var(--font-mono), monospace;
    &.src-stem::before { content: "Stem"; }
}

blockquote {
    width: 80%;
    margin: 40px auto;
    font-style: italic;
    color: var(--text-main);
    padding: 1.5em 30px 1.5em 60px;
    border-left: 4px solid var(--accent);
    border-radius: 0 8px 8px 0;
    line-height: 1.6;
    position: relative;
    background: color-mix(in srgb, var(--accent) 15%, transparent);

    @include bp('mobile') {
        padding: 1em 15px 1em 40px;
        width: 100%;
    }

    &::before {
        font-family: var(--font-serif), serif;
        content: "\201C";
        color: var(--accent);
        font-size: 5em;
        position: absolute;
        left: 10px;
        top: -20px;
        opacity: 0.5;
    }
}

math {
    display: inline-block;
    white-space: nowrap;

    &[display="block"] {
        font-family: var(--font-math);
        font-size: 1.3em;
        min-width: 0;
        overflow-y: hidden;

        & mtable {
            margin-left: 0;
            text-align: left;
        }

        & mtd { text-align: left; }
        @include custom-scrollbar;
        @include horizontal-scroll;
    }
}

h1.title {
    padding-top: 1.5rem; 
    margin-top: 0.5rem;
}

.underline {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}

.footdef .footpara, .footdef p {
  display: inline;
  margin: 0;
}

.footdef {
    display: block;
    sup {
        display: inline;
        vertical-align: super;
        margin-right: 0.25em;
    }
}

.footnotes-label-hidden {
  display: none;
}

.title {
    font-size: 2.6rem;
    margin-bottom: 0.5rem;
    text-align: center;

    & .subtitle {
        text-align: center;
        font-style: italic;
        padding-bottom: 30px;
        /* maybe change */
        margin-top: 10px;
        color: #555;
        display: block;
        font-size: 1.2rem; 
        font-family: var(--font-header), serif;
    }
}

.author, .date {
    display: inline;
    font-family: var(--font-serif), serif;
    font-style: italic;
    font-size: 1.1rem;
    color: color-mix(in srgb, var(--text-main) 70%, gray);
}

.author {
    &::before {
        content: "by ";
        font-family: var(--font-mono), monospace;
        font-style: normal;
        font-weight: bold;
        text-transform: uppercase;
        font-size: 0.8rem;
        letter-spacing: 1px;
        margin-right: 4px;
        text-align: center;
    } 
    &:not(:last-child)::after { content: ", "; font-style: normal; }
}

.todo, .done, .tag, .timestamp-wrapper {
    font-family: var(--font-mono), monospace;
    font-size: 0.75em;
    font-weight: bold;
    letter-spacing: 1px;
    padding: 2px 8px;
    border-radius: 4px;
    vertical-align: middle;
    margin-right: 6px;
}

.todo.TODO { 
    color: #5c3a21; 
    background-color: color-mix(in srgb, var(--accent) 30%, var(--bg-main)); 
    border: 1px solid var(--accent); 
}

.done.DONE { 
    color: #2a3b24; 
    background-color: #e4e7d3; 
    border: 1px solid #8f9e76; 
}

.timestamp-wrapper {
    margin-left: 8px;
    font-weight: normal;
    color: #5e4a57;
    background-color: #efe6eb;
    border: 1px solid #c8b2bc;

    display: inline-block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 32ch;
    vertical-align: middle
}

.tag {
    margin-left: 8px;
    font-weight: normal;
    color: color-mix(in srgb, var(--text-main) 80%, transparent);
    background-color: color-mix(in srgb, var(--accent) 15%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);

    display: inline-block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 16ch;
    vertical-align: middle
}

.theorem,
.lemma,
.corollary,
.definition,
.proof {
    display: block;
    font-style: normal;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    border-left: 3px solid var(--accent);
    padding: 1rem 1.3rem;
    margin: 2rem 0 20px 10px;
    &::before {
        font-weight: bold;
        margin-right: 0.4em;
    }
}

.theorem::before { content: "Theorem."; }
.lemma::before { content: "Lemma."; }
.corollary::before { content: "Corollary."; }
.definition::before { content: "Definition."; }

.proof {
    position: relative;
    margin-bottom: 30px;
    padding-right: 1.2em;
    &::before { content: "Proof.\00a0\00a0"; }
    &::after {
        content: "";
        position: absolute;
        right: 0;
        bottom: 0.2em;
        width: 0.65em;
        height: 0.65em;
        border: 0.08em solid currentColor;
        box-sizing: border-box;
    }
}

.links-page > ul {
    columns: 2;
    @include bp('mobile') { columns: 1; }
}

.org-svg { width: 100%; max-width: none; }

.verse {
    width: fit-content;
    max-width: min(100%, 38rem);
    margin: 2rem auto;
    padding: 1.25rem 1.5rem;
    white-space: pre-wrap;
    line-height: 1.9;
    font-style: italic;
    color: color-mix(in srgb, var(--text-main) 92%, transparent);
    background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.src, .example {
    @include custom-scrollbar;
    @include horizontal-scroll;
    
    position: relative;
    background: var(--code-bg);
    color: var(--code-text);
    padding: 1rem;
    border-radius: 6px;
    font-size: 0.9rem;

    &::before {
        position: absolute;
        top: 0.5rem;
        right: 0.5rem;
        float: right;
        z-index: 10;
        font-family: var(--font-mono), monospace;
        font-size: 0.7rem;
        opacity: 0.5;
        pointer-events: none;
        background: var(--code-bg); 
        padding: 2px 4px;
    }
}

.org-center {
    text-align: center;
}

.question {
    width: 80%;
    margin: 40px auto;
    font-style: normal; 
    color: var(--text-main);
    padding: 1.5em 30px 1.5em 60px;
    border-left: 4px solid var(--accent);
    border-radius: 0 8px 8px 0;
    line-height: 1.6;
    position: relative;
    z-index: 1;
    background: color-mix(in srgb, var(--accent) 8%, transparent);

    @include bp('mobile') {
        padding: 1em 15px 1em 40px;
        width: 100%;
    }

    &::before {
        font-family: var(--font-serif), serif;
        content: "?";
        color: var(--accent);
        font-size: 5em;
        position: absolute;
        left: 15px; 
        top: -15px; 
        opacity: 0.5;
        z-index: 0;
    }
    &::after {
        content: "";
        position: absolute;
        inset: 0;
        z-index: -1;
        pointer-events: none;
        border-radius: inherit;
        background-color: var(--accent);
        opacity: 0.2; 
        
        // This is your exact SVG, just safely encoded in Base64
        $svg-mask: "data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2MCIgaGVpZ2h0PSI2MCIgdmlld0JveD0iMCAwIDYwIDYwIj48dGV4dCB4PSIxNSIgeT0iMjIiIGZvbnQtZmFtaWx5PSJzeXN0ZW0tdWksIHNhbnMtc2VyaWYiIGZvbnQtd2VpZ2h0PSJib2xkIiBmb250LXNpemU9IjIwIiB0ZXh0LWFuY2hvcj0ibWlkZGxlIj4/PC90ZXh0Pjx0ZXh0IHg9IjQ1IiB5PSI1MiIgZm9udC1mYW1pbHk9InN5c3RlbS11aSwgc2Fucy1zZXJpZiIgZm9udC13ZWlnaHQ9ImJvbGQiIGZvbnQtc2l6ZT0iMjAiIHRleHQtYW5jaG9yPSJtaWRkbGUiPj88L3RleHQ+PC9zdmc+";
        
        -webkit-mask-image: url(#{$svg-mask});
        mask-image: url(#{$svg-mask});
        
        -webkit-mask-size: 60px 60px;
        mask-size: 60px 60px;
        -webkit-mask-repeat: repeat;
        mask-repeat: repeat;
    }

    > * {
        position: relative;
    }
}

.equation-container {
    display: grid;
    grid-template-columns: 1fr minmax(0, auto) 1fr;
    align-items: center;
    width: 100%;
    box-sizing: border-box;

    margin: 2rem 0;
    background: accent_rgba(0.05);
    padding: 1.5rem;
    border-left: 2px solid var(--accent);

    .equation {
        grid-column: 2;
        text-align: center;

        & math[display="block"] { margin: 0; }
        
        @include horizontal-scroll;
        @include custom-scrollbar;
    }

    .equation-label {
        grid-column: 3;
        justify-self: end;
    }
}

.org-src-container {
    position: relative;
    margin: 1.2em 0;
    color: var(--code-text);
    background: var(--code-bg);
    padding: 1.5rem 1rem 1rem 1rem;
    overflow-x: auto;
    overflow-y: hidden;
    @include custom-scrollbar;

    pre.src {
        margin: 0;
        border: none;
        overflow: visible;
        display: inline-block;
        min-width: 100%;
        width: max-content;
        padding-right: 1rem;
        box-sizing: border-box;
    }
}

.figure { 
    margin: 2rem auto; 
    text-align: center; 
    display: flex;
    flex-direction: column;
    align-items: center;

    p:last-of-type {
        font-size: 0.9rem; 
        color: color-mix(in srgb, var(--text-main) 80%, gray); 
        margin-top: 0.5rem; 
        max-width: 80%;
    }
}

.figure-number {
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--text-main);
}

#preamble {
    margin-top: 10px;
    margin-bottom: 0;

    .preamble {
        font-family: var(--font-mono), monospace;
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        color: color-mix(in srgb, var(--text-main) 50%, transparent); 
    }
    
    a {
        color: var(--text-main);
        text-decoration: none;
        padding: 4px 8px;
        border-radius: 4px;
        transition: all 0.2s ease;
        &:hover {
            background: color-mix(in srgb, var(--accent) 15%, transparent);
            color: var(--link-color);
        }
    }

    & hr {
        border: none;
        height: 1px;
        background: linear-gradient(to right, var(--accent), transparent);
        opacity: 0.5;

        width: 100%;
        margin: 1rem 0 0 0;
    }
}

#table-of-contents {
    height: 100vh;
    width: 250px;
    position: fixed;
    z-index: 10;
    top: 0;
    left: 0;
    padding-top: 0;
    background: var(--toc-bg);
    border-right: 1px solid var(--accent);
    overflow-y: auto;
    overflow-x: hidden;
    
    @include custom-scrollbar;

    &::before {
        content: "NAVIGATION";
        display: block;
        padding: 24px 16px 12px 19px; 
        font-family: var(--font-mono), monospace;
        font-size: 11px;
        font-weight: bold;
        letter-spacing: 2px;
        color: var(--text-main);
        border-bottom: 1px solid accent_rgba(0.2);
        margin-bottom: 10px;
    }

    ul {
        list-style-type: none;
        padding-left: 0;
        margin: 0;

        a {
            display: block;
            width: 100%;
            padding: 10px 16px 10px 32px;
            font-size: 15px;
            font-family: var(--font-mono), monospace;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            border-left: 3px solid transparent;

            &, &:visited {
                color: var(--text-main);
                text-decoration: none;
            }

            &:hover {
                background-color: var(--text-main);
                color: var(--bg-main);
                padding-left: 22px;
                border-left: 3px solid var(--accent);
            }
        }
        ul {
            a {
                padding-left: 48px;
                opacity: 0.85;
                font-size: 13px;
                &:hover { padding-left: 38px; opacity: 1; }
            }
            ul{
                a {
                    padding-left: 64px;
                    opacity: 0.75;
                    &:hover { padding-left: 54px; }
                }
            }
        }
    }

    h2 { display: none; }
    @include bp('toc') { display: none; }
}

#postamble { text-align: center; }

#content { padding-top: 0; }

#footnotes {
  padding-top: 1rem;
}

#footnotes hr {
  margin-top: 0;
  margin-bottom: 0;
}

#footnotes hr {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}