@font-face {
    font-family: 'Lora';
    font-style: normal;
    font-weight: 500;
    src: url('./fonts/Lora-Medium.ttf') format('truetype');
}

@font-face {
    font-family: 'Inconsolata';
    font-style: normal;
    font-weight: 400;
    src: url('./fonts/Inconsolata-Regular.ttf') format('truetype');
}

@font-face {
    font-family: 'CormorantGaramond';
    font-style: normal;
    font-weight: 600;
    src: url('./fonts/CormorantGaramond-Medium.ttf') format('truetype');
}

:root {
    --bg-main: #FBF8F1;
    --text-main: #4A3F35;
    --toc-bg: #EAE3D2;
    --toc-text: #4A3F35;
    --accent: #D4A373;
    --link-color: #8C6239;

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

    --font-serif: "Lora", serif;
    --font-mono: "Inconsolata", monospace;
    --font-header: "CormorantGaramond";
}

::selection {
    color: white;
    background: #ff4081;
}

body {
    background:
        radial-gradient(rgba(0,0,0,0.02) 1px, transparent 1px),
        var(--bg-main);
    max-width: 65ch;
    line-height: 1.75;
    background-size: 6px 6px;
    margin: 40px auto;
    font-size: 16px;
    color: var(--text-main);
    padding: 0 10px;

    /* fonts */
    font-size: 18px;
    font-family: var(--font-serif);
    font-weight: 500;
    font-variant-ligatures: common-ligatures;
    -webkit-font-smoothing: antialiased;

    @media (max-width: 1250px) {
        margin: 20px auto;
        font-size: 20px;
    }

    @media (max-width: 768px) {
        max-width: 100%;
        padding: 0 15px;
        box-sizing: border-box;
    }
}

input {
    padding: 10px 16px;
    margin: 2px 0;
    box-sizing: border-box;
    border: 2px solid #dabebe;
    border-radius: 6px;
    background: var(--bg-main);
    color: var(--text-main);
    font-size: 16px;
    -webkit-transition: 0.5s;
    transition: 0.5s;
    outline: none;

    &:focus { border: 2px solid var(--text-main); }
}

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

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

h1, h2, h3 {
    line-height: 1.2;
    font-family: var(--font-serif);
}

h1, h2 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-top: 2.5rem;
    letter-spacing: -0.01em;
    position: relative;
}

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

h1 {
    font-size: 2.3rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
    font-family: var(--font-header);
    font-weight: 600;
    letter-spacing: 0;
    line-height: 1.3;
    -webkit-font-smoothing: antialiased;

    @media (max-width: 1250px) { font-size: 1.8rem; }
}

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

    @media (max-width: 1250px) { font-size: 18px; }
    @media (max-width: 768px) { font-size: 1.5rem; }
}

h3 {
    font-size: 1.25rem;
    margin-top: 2rem;
    margin-bottom: 0.4rem;
}

img, blockquote {
    @media (max-width: 768px) {
        max-width: 100%;
        box-sizing: border-box;
    }
}

img {
    border-radius: 10px;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
    display: block;
}

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);

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

    &::after { content: ''; }

    @media (max-width: 768px) {
        padding: 1em 15px 1em 40px; 
        width: 100%;
    }
}

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

a {
    cursor: pointer;
    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;
    }
}

p { margin: 1.2rem 0; }

li { margin: 0.3rem 0; }

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

.org-src-container {
    position: relative;
    margin: 1.2em 0;
    
    pre.src {
        position: relative !important;
        overflow: visible !important; 
        background: var(--code-bg);
        border-radius: 6px;
        margin: 0 !important;
        padding: 0 !important;
        border: none !important;

        & > code {
            display: block;
            overflow-x: auto;
            padding: 1.5rem 1rem 1rem 1rem;
            white-space: pre;
            scrollbar-width: none;
            -ms-overflow-style: none;

            &::-webkit-scrollbar { display: none; }
        }

        &::before {
            content: attr(data-language);
            display: block !important;
            position: absolute !important;
            top: 0.5rem;
            right: 0.5rem;
            z-index: 20;
            
            font-family: var(--font-mono), monospace;
            font-size: 0.7rem;
            color: var(--code-text);
            background: var(--code-bg);
            padding: 2px 8px;
            border-radius: 4px;
            opacity: 0.6;
            pointer-events: none;
        }
    }
}

.content {
    margin-left: 280px;
    padding: 0px 10px;

    @media (max-width: 1250px) { margin-left: 0; }
}

.src, .example, mjx-container[jax="CHTML"][display="true"] {
    scrollbar-width: none; 
    -ms-overflow-style: none; 
    overflow-x: auto;

    @media (max-width: 768px) {
        max-width: 100%;
        box-sizing: border-box;
        width: 100%;
    }
}

mjx-container[jax="CHTML"] {
    &[display="true"] {
        background: rgba(212, 163, 115, 0.05);
        padding: 1.5rem;
        text-align: left !important;
        border-left: 2px solid var(--accent);
        margin: 2rem 0 !important;

        &::-webkit-scrollbar { display: none; }
    }

    &:not([display="true"]) {
        padding: 0;
        margin: 0;
        background: transparent;
        border: none;
    }
}

.src, .example {
    position: relative;
    background: var(--code-bg);
    color: var(--code-text);
    padding: 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    box-shadow: none;

    &::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;
    }

    &::-webkit-scrollbar { display: none; }
}

.theorem, .proof {
    display: block;
    margin-left: 10px;
    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;
    &::before {
        float: left;
        font-weight: bold;
    }
}

.theorem {
    margin-bottom:20px;
    &::before { content:"Theorem.\00a0\00a0"; }
}

.proof {
    margin-bottom:30px;

    &::after {
        content: "\25FC";
        float: right;
    }

    &::before { content:'Proof.\00a0\00a0'; }
}

.links-page > ul {
    columns: 2;
    -webkit-columns: 2;
    -moz-columns: 2;
}

header, .title + p, .subtitle + p {
    margin-bottom: 3rem;
    border-bottom: 1px double var(--accent);
    padding-bottom: 1rem;
}

.title {
    font-size: 2.6rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.2rem;
    color: color-mix(in srgb, var(--text-main) 70%, gray);
}

.author, .date {
    display: inline;
    font-family: var(--font-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);
        font-style: normal;
        font-weight: bold;
        text-transform: uppercase;
        font-size: 0.8rem;
        letter-spacing: 1px;
        margin-right: 4px;
    } 

    &:not(:last-child)::after {
        content: ", ";
        font-style: normal;
    }
}

.button {
    background-color: var(--bg-main);
    border: none;
    color: black;
    padding: 6px 14px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    transition-duration: 0.4s;
    cursor: pointer;
    border: 2px solid var(--text-main);
    border-radius: 6px;
    &:hover {
        background-color: var(--text-main);
        color: white;
    }
}

.isa_info, .isa_success, .isa_warning, .isa_error {
    width: 90%;
    margin: 10px 0px;
    padding: 12px;
}

.isa_info {
    color: #00529b;
    background-color: #bde5f8;
}

.isa_success {
    color: #4f8a10;
    background-color: #dff2bf;
}

.isa_warning {
    color: #9f6000;
    background-color: #feefb3;
}

.isa_error {
    color: #d8000c;
    background-color: #ffd2d2;
}

.title + .subtitle {
  text-align: center;
  font-style: italic;
  padding-bottom: 30px;
  margin-top: -10px;
  color: #555;
  display: block;
}

#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;
    scrollbar-width: none;

    &::before {
        content: "NAVIGATION";
        display: block;
        padding: 24px 16px 12px 19px; 
        font-family: var(--font-mono);
        font-size: 11px;
        font-weight: bold;
        letter-spacing: 2px;
        color: var(--text-main);
        border-bottom: 1px solid rgba(212, 163, 115, 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;
            box-sizing: border-box;
            font-size: 13px;
            font-family: var(--font-mono);
            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;
            opacity: 0.8;
            
            &, &: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: 0.55;
                font-size: 12px;

                &:hover {
                    padding-left: 38px;
                    opacity: 1;
                }
            }

            ul a {
                padding-left: 64px;
                opacity: 0.4;

                &:hover {
                    padding-left: 54px;
                }
            }

        }
    }

    h2 { display: none !important; }

    &::-webkit-scrollbar { display: none; }

    @media (max-width: 1250px) { display: none; }
}

#postamble { text-align: center; }