/* === Simplified Orgmode CSS (responsive version with collapsible TOC and specialized link colors) === */

:root {
  --body-color: #34495e;
  --heading-color: #054680;
  --link-color: #269dc7;
  --background: #f8f9f9;
}

/* === Base styles === */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--body-color);
  background-color: white;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  font-size: 1rem;
}

/* === Main content container === */
#content {
  background: var(--background);
  border-radius: 12px;
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem;
  box-sizing: border-box;
  border:solid;
}

/* === Titles === */
.title {
  font-size: clamp(1.5rem, 5vw, 3rem);
  line-height: 1.2;
  margin-top: 0;
  color: var(--heading-color);
}

/* === Headings === */
h1, h2, h3, h4 {
  color: var(--heading-color);
  margin-top: 1.5em;
}
h2 {
  border-bottom: 1px solid #ddd;
  padding-bottom: 0.3em;
}

/* === Links === */
a { color: var(--link-color); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Specialized link colors */
a.journal { color: #C47D30; }
a.journal:hover { color: var(--body-color); }
a.code { color: #20B2AA; }
a.code:hover { color: var(--body-color); }
a.mr { color: #000080; }
a.mr:hover { color: var(--body-color); }
a.arxiv { color: #DC143C; }
a.arxiv:hover { color: var(--body-color); }

/* === Tables === */
table { width: 100%; border-collapse: collapse; margin: 1em 0; border:solid;}
th, td { border: 1px solid #ccc; padding: 0.5em; text-align: left; }
th { background-color: var(--heading-color); color: white; }

/* === Code blocks === */
pre, code { font-family: Menlo, monospace; background: #f2f2f2; border-radius: 6px; }
pre { padding: 1em; overflow-x: auto; }

/* === Images === */
img { max-width: 100%; height: auto; border-radius: 8px; border: 1px solid #ddd; }

/* === Reference grid for papers === */
.ref-container {
  display: grid;
  grid-template-columns: 6fr 1fr;
  gap: 1rem;
  align-items: start;
  margin: 1.5rem 0;
}
.paper-image img {
  max-width: 160px;
  width: 100%;
  height: auto;
  border: 2px solid var(--body-color);
  border-radius: 8px;
  display: block;
}

/* === Hover-revealed Table of Contents === */
#table-of-contents {
  position: sticky;
  top: 1rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  padding: 0.5rem 1rem;
  margin-bottom: 2rem;
  /* max-width: 260px; */
  transition: all 0.3s ease;
  overflow: hidden;
}

/* Keep only the title visible initially */
#table-of-contents h2 {
  margin: 0;
  text-align: center;
  border-bottom: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--heading-color);
  cursor: pointer;
}

/* Hide the actual list by default */
#text-table-of-contents {
  max-height: 0;
  overflow: scroll;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.3s ease;
}

/* Reveal the list on hover */
#table-of-contents:hover #text-table-of-contents {
  max-height: 500px;   /* enough to show all items */
  opacity: 1;
}

/* Make the container grow slightly on hover */
#table-of-contents:hover {
  box-shadow: 0 0 15px rgba(0,0,0,0.15);
  padding-bottom: 1rem;
}

/* Optional: add an arrow indicator to the heading */
#table-of-contents h2::after {
  /* content: "▾"; */
  font-size: 0.9rem;
  margin-left: 0.4em;
  color: var(--link-color);
  transition: transform 0.2s;
}
#table-of-contents:hover h2::after {
  transform: rotate(180deg);
}

/* === Responsive adjustments === */
@media (max-width: 900px) {
  #table-of-contents {
    position: static;
    max-width: none;
    margin: 1rem 0;
  }
}


/* === Footer === */
#postamble {
  font-size: 0.8rem;
  text-align: center;
  color: #777;
  margin: 2rem 0;
}

/* Accessibility: focus outline for keyboard users */
details#table-of-contents summary:focus,
.toc-header:focus { outline: 3px solid rgba(26,117,149,0.15); outline-offset: 3px; }