/* ==================================================================
   Magnifica Humanitas — reader edition
   Layout: [ TOC rail (left, sticky, collapsible) ]
           [ article: prose column + right margin sidenotes ]
           [ location rail (right, fixed) ]
   ================================================================== */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Inter:wght@400;500;600&display=swap');

/* ---- theme tokens -------------------------------------------------- */

:root {
  --bg: #fdf6e3;
  --bg-alt: #f5ecd0;
  --bg-rail: #f8efd5;
  --ink: #1a1a1a;
  --ink-soft: #5b5b5b;
  --ink-faint: #8f8a78;
  --rule: #d9cfb1;
  --rule-soft: #e8dfc1;
  --accent: #7a3b1f;
  --accent-hover: #b35423;
  --ann: #1f5f8b;        /* editorial annotation — slate blue */
  --ann-soft: #3d7aa0;
  --ann-bg: #e7f1f8;

  --serif: 'EB Garamond', 'Iowan Old Style', 'Palatino', Georgia, serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;

  --measure: 36rem;
  /* Sidenote column scales fluidly with the viewport instead of jumping at
     breakpoints. At ≤1100px we're in compact mode anyway; at 1100→1500px
     --side grows from 10rem → 18rem; above that, capped. */
  --side:    clamp(10rem, calc(32vw - 12rem), 18rem);
  --gutter:  2.25rem;
  --toc-w:   15rem;
  --toc-w-collapsed: 11rem;
  --rail-w:  3.5rem;        /* reserved space for the para-rail */
}

html[data-theme="dark"] {
  --bg: #161614;
  --bg-alt: #1f1f1d;
  --bg-rail: #1c1c1a;
  --ink: #ece4cd;
  --ink-soft: #b2ad9a;
  --ink-faint: #7b7868;
  --rule: #3b362a;
  --rule-soft: #2b2820;
  --accent: #e2a679;
  --accent-hover: #ffc89b;
  --ann: #7fb6dc;
  --ann-soft: #a6cce7;
  --ann-bg: #1a2a36;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* When the user clicks the theme toggle we briefly suppress every
   per-element color/background transition so the page swaps palettes
   in a single paint instead of staggering across elements. JS removes
   the class on the next animation frame. */
html.theme-flipping,
html.theme-flipping *,
html.theme-flipping *::before,
html.theme-flipping *::after {
  transition: none !important;
}

body {
  display: grid;
  grid-template-columns: var(--toc-w) minmax(0, 1fr);
  align-items: start;
  min-height: 100vh;
  /* Right padding always reserves space for the fixed-position .para-rail
     when it's visible — keeps article sidenotes from sliding behind it. */
  padding-right: var(--rail-w);
}

html[data-toc="collapsed"] body {
  grid-template-columns: var(--toc-w-collapsed) minmax(0, 1fr);
}

/* ==== TOC rail (left) ==============================================
   No background, no border — the TOC should read as floating marginal
   text, not a sidebar panel. */

.toc-rail {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: transparent;
  border: 0;
}

.toc-head {
  padding: 1rem 0.75rem 0.75rem;
  flex-shrink: 0;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 0.4rem;
  align-items: center;
  justify-content: flex-start;  /* anchor left — buttons don't reflow when TOC opens */
}
.toc-head .ctl-toggle {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
}
.toc-toggle .toc-icon { font-size: 0.85rem; line-height: 1; }

/* The comments-link is an <a> that should otherwise look exactly like the
   other circle toggles in the row. */
a.ctl-toggle {
  text-decoration: none;
}
.comments-icon { font-size: 0.95rem; line-height: 1; }
html[data-toc="collapsed"] .toc { display: none; }

.toc {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  padding: 0.25rem 1rem 1.5rem;
  font-family: var(--sans);
}
.toc::-webkit-scrollbar { width: 4px; }
.toc::-webkit-scrollbar-thumb { background: var(--rule-soft); border-radius: 2px; }
.toc::-webkit-scrollbar-track { background: transparent; }

.toc-top {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.25rem 0 0.9rem;
  margin-bottom: 0.4rem;
  border: 0;
}
.toc-top:hover { color: var(--accent); }

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-list li { margin: 0; }
.toc-list a {
  display: block;
  text-decoration: none;
  color: var(--ink-faint);
  padding: 0.18rem 0;
  font-size: 0.66rem;
  line-height: 1.35;
  transition: color 80ms;
  border: 0;
}
.toc-list a:hover { color: var(--accent); }

.toc-chapter {
  margin-top: 0.9rem;
}
.toc-chapter > a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  color: var(--ink-soft);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-size: 0.62rem;
  padding: 0.25rem 0;
}
.toc-roman {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink-faint);
  flex-shrink: 0;
  min-width: 1.4rem;
  font-size: 0.72rem;
}
.toc-chapter > a:hover { color: var(--accent); }
.toc-chapter > a:hover .toc-roman { color: var(--accent); }
.toc-title { flex: 1; }

.toc-section { padding-left: 2rem; }
.toc-section a { font-size: 0.64rem; color: var(--ink-faint); }
.toc-section.active a,
.toc-chapter.active > a { color: var(--accent); }
.toc-chapter.active > a .toc-roman { color: var(--accent); }

/* ==== main page ==================================================== */

.page {
  padding: 4rem clamp(1.5rem, 4vw, 3rem) 8rem;
  min-width: 0;
}

article {
  max-width: calc(var(--measure) + var(--gutter) + var(--side));
  margin: 0 auto;
}

/* ---- masthead ----------------------------------------------------- */

.masthead {
  max-width: var(--measure);
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2rem;
}
.eyebrow {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin: 0 0 0.5rem;
}
.masthead h1 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 3.2rem;
  line-height: 1.05;
  margin: 0 0 0.9rem;
  color: var(--ink);
}
.masthead h1 em { font-style: italic; }
.addressee {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--ink);
  margin: 0 0 0.5rem;
}
.subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--ink-soft);
  margin: 0 0 1.5rem;
  max-width: 32rem;
  line-height: 1.35;
}
.source {
  margin: 0;
  font-family: var(--sans);
  font-size: 0.72rem;
  color: var(--ink-faint);
}
.source a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
}
.source a:hover { color: var(--accent); border-color: var(--accent); }

/* ---- body --------------------------------------------------------- */

.body { max-width: var(--measure); }

.chapter {
  font-family: var(--serif);
  font-weight: 500;
  text-align: center;
  margin: 5rem 0 2.5rem;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}
.chapter::before, .chapter::after {
  content: "";
  display: block;
  width: 3rem;
  height: 1px;
  background: var(--rule);
  margin: 0.6rem auto;
}
.chapter-label {
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 600;
}
.chapter-title {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: 0.01em;
  max-width: 28rem;
}

.section {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.5rem;
  margin: 3rem 0 1.2rem;
  line-height: 1.25;
}

.subsection {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.2rem;
  color: var(--ink-soft);
  margin: 2rem 0 0.8rem;
}

p.para {
  position: relative;
  margin: 0 0 1.2rem;
  hyphens: auto;
  -webkit-hyphens: auto;
  /* Layout/style containment scopes reflows when 37k word-spans change,
     without clipping the sidenotes that float into the right margin
     (those use negative margin to extend outside .para). content-visibility
     would *also* paint-contain and clip them, so we can't use it here. */
  contain: layout style;
}
.paranum {
  position: absolute;
  left: -3rem;
  top: 0.1em;
  width: 2.2rem;
  text-align: right;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
  user-select: none;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  transition: color 100ms;
}
.paranum:hover { color: var(--accent); }
.paranum.copied { color: var(--accent); }
.paranum.copied::after {
  content: "link copied";
  position: absolute;
  right: 100%;
  top: 50%;
  transform: translateY(-50%);
  margin-right: 0.4rem;
  padding: 0.15rem 0.4rem;
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
  white-space: nowrap;
  pointer-events: none;
}
p.other { font-style: italic; color: var(--ink-soft); margin-top: 3rem; }

/* ---- inline links ------------------------------------------------- */

article a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: color 80ms, border-color 80ms;
}
article a:hover { color: var(--accent); border-color: var(--accent); }

/* ==== sidenote markers (inline) ==================================== */

.sidenote-marker,
.annotation-marker {
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 600;
  vertical-align: super;
  line-height: 0;
  margin: 0 0.05rem 0 0.05rem;
  cursor: pointer;
}
.sidenote-marker {
  color: var(--accent);
}
.annotation-marker {
  color: var(--ann);
  font-style: italic;
}

/* ==== sidenote bodies (right margin) =============================== */

.sidenote {
  float: right;
  clear: right;
  margin-right: calc(-1 * (var(--side) + var(--gutter)));
  width: var(--side);
  font-family: var(--serif);
  font-size: 0.82rem;
  line-height: 1.42;
  position: relative;
  margin-top: 0.3rem;
  margin-bottom: 0.6rem;
  padding-left: 0;
}
.sidenote.citation { color: var(--ink-soft); }
.sidenote.annotation {
  color: var(--ann);
  font-family: var(--serif);
  font-style: normal;
  background: transparent;
  border-left: 2px solid var(--ann);
  padding-left: 0.65rem;
  margin-left: 0;
}
.sidenote i, .sidenote em { font-style: italic; }

.sn-label {
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--accent);
  vertical-align: super;
  margin-right: 0.3rem;
  letter-spacing: 0.02em;
}
.sidenote.annotation::before {
  content: attr(data-label);
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 600;
  font-style: italic;
  color: var(--ann);
  vertical-align: super;
  margin-right: 0.3rem;
}

.sidenote a {
  color: inherit;
  border-bottom-color: var(--rule);
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.sidenote a:hover { color: var(--accent); border-color: var(--accent); }
.sidenote.annotation a { border-bottom-color: rgba(31, 95, 139, 0.35); }
.sidenote.annotation a:hover { color: var(--ann-soft); border-color: var(--ann-soft); }

/* Hide only the checkbox inputs — the <label> markers wear the same class
   so they can toggle the sidenote, but they must stay visible as superscript
   citation/annotation indicators in the body text. */
input.margin-toggle { display: none; }

/* ==== paragraph rail (right, fixed) ===============================
   Vertical column on the right edge — one tick per paragraph,
   clickable to jump, currently-visible paragraphs highlighted. */

.para-rail {
  position: fixed;
  right: 0.75rem;
  top: 1.5rem;
  bottom: 1.5rem;
  width: 2.6rem;
  z-index: 40;
  font-family: var(--sans);
  pointer-events: none;     /* the ticks themselves re-enable it */
}
.para-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.para-rail-list li {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  position: relative;
}
.para-rail-list a {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem;
  width: 100%;
  height: 100%;
  text-decoration: none;
  color: var(--ink-faint);
  font-size: 0.58rem;
  letter-spacing: 0.02em;
  border: 0;
  padding-right: 0;
}
.para-rail-list a:hover { color: var(--accent); }
/* The tick mark itself */
.para-rail-list a::after {
  content: "";
  display: block;
  width: 0.45rem;
  height: 1px;
  background: var(--rule);
  transition: width 100ms ease, background 100ms ease;
}
.para-rail-list a:hover::after { width: 0.9rem; background: var(--accent); }
/* Number labels: hidden by default; shown at intervals & chapter starts. */
.para-rail-list .num { display: none; }
.para-rail-list li.label .num,
.para-rail-list li.chapter-start .num {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}
.para-rail-list li.chapter-start a {
  color: var(--ink);
  font-weight: 600;
}
.para-rail-list li.chapter-start .num {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}
.para-rail-list li.chapter-start a::after {
  width: 0.85rem;
  background: var(--ink);
}
/* Active (in viewport) */
.para-rail-list li.active a { color: var(--accent); }
.para-rail-list li.active a::after { background: var(--accent); width: 0.7rem; }
.para-rail-list li.active.label .num,
.para-rail-list li.active.chapter-start .num { color: var(--accent); }
/* Show number for the currently active paragraph too */
.para-rail-list li.active .num {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ==== shared toggle button (used in toc-head) ===================== */

.ctl-toggle {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--rule);
  cursor: pointer;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  transition: background 120ms, color 120ms, border-color 120ms;
  padding: 0;
}
.ctl-toggle:hover { color: var(--accent); border-color: var(--accent); }

.theme-icon, .attn-icon { font-size: 0.95rem; line-height: 1; }
.theme-icon-dark { display: none; }
html[data-theme="dark"] .theme-icon-light { display: none; }
html[data-theme="dark"] .theme-icon-dark { display: inline; }

/* SVG icons inside circle toggles — sit in the geometric center of the
   button instead of fighting Unicode-glyph baselines. */
.ctl-toggle .ico {
  display: block;
  width: 1.05em;
  height: 1.05em;
  flex-shrink: 0;
}

/* Attention toggle: closed eye when off, open eye when on. */
.attention-toggle .attn-icon-on  { display: none; }
.attention-toggle .attn-icon-off { display: block; }
html[data-attention="on"] .attention-toggle .attn-icon-on  { display: block; color: var(--attn-accent); }
html[data-attention="on"] .attention-toggle .attn-icon-off { display: none; }
html[data-attention="on"] .attention-toggle { border-color: var(--attn-accent); }

/* ==== attention overlay ============================================ */

:root {
  --attn-accent: #c47a18;     /* warm amber, distinct from accent + annotation */
  --attn-focus: rgba(196, 122, 24, 0.42);
  --attn-strong: rgba(196, 122, 24, 0.26);
  --attn-medium: rgba(196, 122, 24, 0.16);
  --attn-weak:   rgba(196, 122, 24, 0.085);
  --attn-hint:   rgba(196, 122, 24, 0.16);  /* discoverability dots — faint */
  --attn-dim:    rgba(0, 0, 0, 0);
}
html[data-theme="dark"] {
  --attn-accent: #f5b75a;
  --attn-focus: rgba(245, 183, 90, 0.42);
  --attn-strong: rgba(245, 183, 90, 0.30);
  --attn-medium: rgba(245, 183, 90, 0.20);
  --attn-weak:   rgba(245, 183, 90, 0.10);
  --attn-hint:   rgba(245, 183, 90, 0.18);
}

/* Every body word is wrapped in <span class="w" data-w="N">.
   The data-w index is the word's position within its paragraph, which the
   JS uses to look up attention[paragraph_id][word_idx].
   contain:layout tells the browser that nothing inside this 1-line span can
   affect outside layout — huge perf win when resizing with 37k of these. */
.w {
  border-radius: 2px;
  contain: layout style;
}
/* Transition only kicks in when attention is on — keeps the browser from
   maintaining transition state on every word during normal reading. */
html[data-attention="on"] .w {
  cursor: help;
  transition: background-color 90ms ease;
}
html[data-attention="on"] .w:hover,
.w.attn-focus {
  background-color: var(--attn-focus);
  box-shadow: 0 0 0 1px rgba(196, 122, 24, 0.35);
}
.w.attn-strong  { background-color: var(--attn-strong); }
.w.attn-medium  { background-color: var(--attn-medium); }
.w.attn-weak    { background-color: var(--attn-weak); }

/* ==== responsive =================================================== */

/* --side scales fluidly via clamp(). Below ~1340px the sidenote column
   gets cramped enough to feel crowded against the para-rail; we collapse
   sidenotes inline at that width, hide the rail, and recover the body
   padding-right that had reserved space for it. */
@media (max-width: 1340px) {
  body { padding-right: 0; grid-template-columns: var(--toc-w-collapsed) 1fr; }
  html[data-toc="collapsed"] body { grid-template-columns: var(--toc-w-collapsed) 1fr; }
  .toc { display: none; }
  html[data-toc="expanded"] .toc { display: block; }
  html[data-toc="expanded"] body { grid-template-columns: var(--toc-w) 1fr; }
  .para-rail { display: none; }
  /* Sidenotes inline, click-to-expand */
  .paranum {
    position: static;
    display: inline;
    margin-right: 0.5rem;
    color: var(--accent);
  }
  .sidenote {
    display: none;
    float: none;
    clear: both;
    width: auto;
    margin: 0.6rem 0 1rem 0;
    padding: 0.6rem 0.8rem;
    background: var(--bg-alt);
    border-left: 2px solid var(--rule);
    font-size: 0.85rem;
  }
  .sidenote.annotation {
    background: var(--ann-bg);
    border-left-color: var(--ann);
  }
  .margin-toggle:checked + .sidenote { display: block; }
  .sidenote-marker, .annotation-marker {
    border: 1px solid currentColor;
    border-radius: 0.6rem;
    padding: 0 0.3rem;
    line-height: 1;
    font-size: 0.58rem;
  }
}

@media (max-width: 700px) {
  body {
    display: block;
  }
  .toc-rail {
    position: relative;
    width: 100%;
    height: auto;
    max-height: none;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }
  .toc { padding-top: 0.25rem; }
  .page { padding: 2rem 1.25rem 6rem; }
  .masthead h1 { font-size: 2.3rem; }
  .subtitle { font-size: 1.05rem; }
  html, body { font-size: 18px; }
}

/* ==== print ======================================================== */

@media print {
  :root { --bg: #fff; --ink: #000; }
  .toc-rail, .para-rail { display: none; }
  body { grid-template-columns: 1fr; }
  .sidenote { float: none; width: auto; margin: 0.4rem 0; font-size: 0.75rem; }
}