@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');
}

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

/* @media (prefers-color-scheme: dark) { */
/*     :root { */
/*         --bg-main: #1e1e2e; */
/*         --text-main: #cdd6f4; */
/*         --toc-bg: #11111b; */
/*         --quote-accent: #f5c2e7; */
/*     } */
/* } */

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: "Lora";
    font-weight: 500;
    font-variant-ligatures: common-ligatures;
    -webkit-font-smoothing: antialiased;

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

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);
    }
}

.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;
}

h1,
h2,
h3 {
    line-height: 1.2;
    font-family: "Lora";
}

h1 {
    @media (max-width: 1250px) {
        font-size: 20px;
    }
}

h2 {
    @media (max-width: 1250px) {
        font-size: 18px;
    }
}

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

h1 {
    font-size: 2.1rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
}

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

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

p {
    margin: 1.2rem 0;
}

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

li {
    margin: 0.3rem 0;
}

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

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

mjx-container[jax="CHTML"] {
    text-align: left !important;
    background: rgba(212, 163, 115, 0.05); /* Uses a hint of your --quote-accent */
    padding: 1.5rem;
    border-left: 2px solid var(--quote-accent);
    margin: 2rem 0 !important;
    overflow-x: auto;
}

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;
    }
}

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

#table-of-contents {
    height: 100vh;
    width: 250px;
    position: fixed;
    z-index: 10; /* Ensure it stays above content */
    top: 0;
    left: 0;
    padding-top: 0; /* Removed the 20px space at the top */
    background: var(--toc-bg);
    border-right: 1px solid var(--quote-accent);
    overflow-y: auto; /* Allow scrolling if TOC is very long */
    overflow-x: hidden;
    
    /* Technical Header for TOC */
    &::before {
        content: "INDEX // NAVIGATION";
        display: block;
        padding: 20px 16px 10px 16px;
        font-family: "Inconsolata";
        font-size: 10px;
        letter-spacing: 2px;
        color: var(--quote-accent);
        border-bottom: 1px solid rgba(212, 163, 115, 0.2);
        margin-bottom: 10px;
    }

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

        a {
            padding: 8px 16px;
            display: block;
            font-size: 14px;
            font-family: "Inconsolata"; /* Using mono for the 'futuristic' look */
            white-space: nowrap;      /* Keep text on one line */
            overflow: hidden;         /* Hide overflow */
            text-overflow: ellipsis;  /* Use "..." for long titles */
            transition: all 0.2s ease;
            
            &, &:visited {
                color: var(--text-main);
                text-decoration: none;
            }

            &:hover {
                background-color: var(--text-main);
                color: var(--bg-main);
                padding-left: 22px; /* Slight 'slide' effect on hover */
            }
        }
    }
}

/* #table-of-contents { */
/*     height: 100%; */
/*     width: 250px; */
/*     position: fixed; */
/*     z-index: 1; */
/*     top: 0; */
/*     left: 0; */
/*     font-size: 0px; */
/*     overflow-x: hidden; */
/*     padding-top: 20px; */
/*     border-right: 1px; */
/*     background: var(--toc-bg); */
/*     ul { */
/*         list-style-type: none; */
/*         padding-left: 0; */
/*         a { */
/*             padding: 6px 8px 6px 16px; */
/*             display: block; */
/*             font-size: 15px; */
            
/*             &, &:visited { */
/*                 color: var(--text-main);  */
/*                 background-color: transparent;  */
/*                 text-decoration: none; */
/*             } */
            
/*             &:hover, &:visited:hover { */
/*                 color: var(--bg-main);  */
/*                 background-color: var(--text-main);  */
/*             } */
/*         } */
/*     } */

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

.content {
    margin-left: 160px;
    padding: 0px 10px;
    @media (max-width: 1250px) {
        margin-left: 0; 
    }
}

.src,
.example {
    background: #1e1e2e;
    color: #cdd6f4;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.9rem;
    box-shadow: none;
}

#postamble {
    text-align: center;
}

pre {
    font-family: "Inconsolata", monospace;
    &.src-stem::before {
        content: "Stem";
    }
}

.theorem, .proof {
    display: block;
    margin-left: 10px;
    font-style: normal;
    background: color-mix(in srgb, var(--quote-accent) 8%, transparent);
    border-left: 3px solid var(--quote-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;

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

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

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

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(--quote-accent);
    border-radius: 0 8px 8px 0;
    line-height: 1.6;
    position: relative;
    background: color-mix(in srgb, var(--quote-accent) 15%, transparent);

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

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;
}

.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; /* Keep them on the same line */
    font-family: "Lora";
    font-style: italic;
    font-size: 1.1rem;
    color: color-mix(in srgb, var(--text-main) 70%, gray);
}

/* Add the "by" prefix using a pseudo-element */
.author::before {
    content: "by ";
    font-family: "Inconsolata"; /* Technical contrast */
    font-style: normal;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    margin-right: 4px;
}

/* Add a comma separator between author and date if both exist */
.author:not(:last-child)::after {
    content: ", ";
    font-style: normal;
}

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