/* =========================================================
   Global layout container
========================================================= */
.layout {
    display: flex;
    flex-direction: row;
    align-items: flex-start; /* top-align TOC and main */
    max-width: 1150px;
    margin: 2rem auto; /* center horizontally */
    padding: 0;
    gap: 2rem; /* space between TOC and main content */
    background-color: #faf9f5;
}

body {
    margin: 0;
}

/* =========================================================
   TOC (sticky instead of fixed)
========================================================= */
nav[role="doc-toc"] {
    width: 260px;
    position: sticky;   /* stick to top of viewport */
    top: 1rem;          /* offset from top */
    align-self: flex-start; /* prevents stretching in flex */
    padding: 2rem 1.5rem;
    border-right: 1px solid #ddd;
    background-color: #f5faf9;
}

/* TOC title */
nav[role="doc-toc"] .toc-title {
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* TOC links */
nav[role="doc-toc"] ul {
    list-style: disc !important;
    margin: 0;
    padding: 0;
}

nav[role="doc-toc"] li {
    margin-bottom: 0.5em;
}

nav[role="doc-toc"] a {
    color: #1a0dab;
    text-decoration: none;
}

nav[role="doc-toc"] a:hover {
    text-decoration: underline;
}

/* =========================================================
   Main content area
========================================================= */
main {
    flex: 1;               /* take remaining space */
    padding: 0 2rem 2rem 0;
    margin: 0;

    font-family: "Georgia", "Times New Roman", Times, serif;
    font-size: 18px;
    line-height: 1.6;
    color: #222;
}

main h1:first-child {
    margin-top: 0;
}

main img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* =========================================================
   Headings
========================================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
    font-weight: 600;
    margin: 1em 0 0.5em;
    line-height: 1.3;
    color: #111;
}

/* =========================================================
   MathJax styling
========================================================= */
mjx-container[display="true"] { display: block; margin: 1em 0; }
mjx-container:not([display="true"]) { display: inline; }

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 900px) {
    .layout {
        flex-direction: column;
        margin-top: 1rem;
        gap: 0;
    }
/*
    nav[role="doc-toc"] {
        width: 100%;
        border-left: none;
        border-bottom: 1px solid #ddd;
        padding: 1rem;
        position: relative; /* sticky not needed in column mode 
      
    }
*/
    main {
        margin: 0;
        padding: 1rem;
    }
}