/* ==========================================================================
   Econometrics I — PIMES/UFPE
   Component styles: pedagogical boxes and annotated equations.

   Plain CSS (not SCSS) on purpose: this file is loaded by BOTH the website and
   the Reveal.js decks via the `css:` key, so the components look identical in
   the notes and in the lecture. Colours go through custom properties so the
   dark theme only has to restate the variables.
   ========================================================================== */

:root {
  --econ-ink:        #1a1f2e;
  --econ-muted:      #5b6478;
  --econ-rule:       #e2e6ee;
  --econ-surface:    #ffffff;
  --econ-surface-2:  #f7f8fb;

  /* One accent per box type. */
  --econ-dgp:        #475569;
  --econ-questions:  #2d3f6b;
  --econ-toolbox:    #0f766e;
  --econ-hood:       #92400e;
  --econ-montecarlo: #6d28d9;
  --econ-connection: #9d174d;
  --econ-literature: #1e5f8c;

  /* Annotated equations: term highlight. */
  --econ-eqt:        #b45309;
  --econ-eqt-bg:     rgba(180, 83, 9, 0.13);
  --econ-eqt-ring:   rgba(180, 83, 9, 0.38);
}

.quarto-dark,
[data-bs-theme="dark"],
.reveal.dark {
  --econ-ink:        #e6e9f0;
  --econ-muted:      #98a2b8;
  --econ-rule:       #2c3444;
  --econ-surface:    #151a24;
  --econ-surface-2:  #1b2130;

  --econ-dgp:        #94a3b8;
  --econ-questions:  #8fa5d8;
  --econ-toolbox:    #4dd4c3;
  --econ-hood:       #e0a458;
  --econ-montecarlo: #b191f0;
  --econ-connection: #f08fb4;
  --econ-literature: #7cb8e0;

  --econ-eqt:        #f0b45f;
  --econ-eqt-bg:     rgba(240, 180, 95, 0.18);
  --econ-eqt-ring:   rgba(240, 180, 95, 0.45);
}

/* NOTE ON UNITS: everything below sizes type in `em`, never `rem`. Reveal.js
   scales slides by setting a font-size on .reveal; `rem` bypasses that and
   resolves against the 16px document root, so rem-sized box text renders at
   under half the surrounding size on a deck.

   -------------------------------------------------------------------------- */

/* --------------------------------------------------------------------------
   1. Pedagogical boxes
   -------------------------------------------------------------------------- */

.econ-box {
  --accent: var(--econ-questions);
  margin: 1.75rem 0;
  border: 1px solid var(--econ-rule);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--econ-surface-2);
  overflow: hidden;
  page-break-inside: avoid;
  break-inside: avoid;
}

.econ-box-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5em;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--econ-rule);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.econ-box-icon {
  font-size: 0.95em;
  line-height: 1;
  color: var(--accent);
}

.econ-box-label {
  font-size: 0.72em;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
}

.econ-box-sep { color: var(--econ-muted); opacity: 0.6; }

.econ-box-title {
  font-size: 0.94em;
  font-weight: 600;
  color: var(--econ-ink);
}

.econ-box-body {
  padding: 0.9rem 1rem 0.4rem;
  font-size: 0.96em;
}

.econ-box-body > *:last-child { margin-bottom: 0.5rem; }

.econ-box-dgp        { --accent: var(--econ-dgp); }
.econ-box-questions  { --accent: var(--econ-questions); }
.econ-box-toolbox    { --accent: var(--econ-toolbox); }
.econ-box-hood       { --accent: var(--econ-hood); }
.econ-box-montecarlo { --accent: var(--econ-montecarlo); }
.econ-box-connection { --accent: var(--econ-connection); }
.econ-box-literature { --accent: var(--econ-literature); }

/* "The Four Questions" is almost always an ordered list; tighten it. */
.econ-box-questions .econ-box-body ol {
  margin-bottom: 0.5rem;
  padding-left: 1.2rem;
}
.econ-box-questions .econ-box-body ol li { margin-bottom: 0.3rem; }

/* Under the Hood usually carries code. */
.econ-box-hood pre {
  background: var(--econ-surface);
  border: 1px solid var(--econ-rule);
  border-radius: 4px;
  font-size: 0.86em;
}

/* --------------------------------------------------------------------------
   2. Annotated equations
   -------------------------------------------------------------------------- */

.econ-eqnote {
  margin: 1.9rem 0;
  padding: 1.1rem 1.15rem 0.85rem;
  border: 1px solid var(--econ-rule);
  border-radius: 6px;
  background: var(--econ-surface-2);
}

.econ-eqnote-math {
  margin-bottom: 0.35rem;
  overflow-x: auto;
  overflow-y: hidden;
}

.econ-eqnote-math mjx-container { margin: 0.35em 0 !important; }

.econ-eqnote-notes {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.9rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--econ-rule);
}

.econ-eqnote-note {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  gap: 0.65rem;
  align-items: start;
  padding: 0.4rem 0.5rem;
  border-radius: 5px;
  cursor: pointer;
  transition: background 120ms ease, box-shadow 120ms ease;
}

.econ-eqnote-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  border: 1px solid var(--econ-eqt-ring);
  background: var(--econ-eqt-bg);
  color: var(--econ-eqt);
  font-family: var(--bs-font-monospace, ui-monospace, monospace);
  font-size: 0.78em;
  font-weight: 700;
  line-height: 1;
}

.econ-eqnote-text {
  font-size: 0.93em;
  color: var(--econ-ink);
}

.econ-eqnote-text > *:last-child { margin-bottom: 0; }

/* Tagged term inside the typeset math. */
.eqt {
  border-radius: 3px;
  padding: 0.08em 0.12em;
  cursor: pointer;
  transition: background 120ms ease, box-shadow 120ms ease;
}

.eqt:hover { background: var(--econ-eqt-bg); }

.eqt.eqt-active {
  background: var(--econ-eqt-bg);
  box-shadow: 0 0 0 2px var(--econ-eqt-ring);
}

.eqt.eqt-pinned { box-shadow: 0 0 0 2px var(--econ-eqt); }

.econ-eqnote-note.eqt-active {
  background: var(--econ-eqt-bg);
  box-shadow: inset 3px 0 0 var(--econ-eqt);
}

.econ-eqnote-note.eqt-pinned { box-shadow: inset 3px 0 0 var(--econ-eqt); }

.eqt:focus-visible,
.econ-eqnote-note:focus-visible {
  outline: 2px solid var(--econ-eqt);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .eqt, .econ-eqnote-note { transition: none; }
}

/* --------------------------------------------------------------------------
   3. Reveal.js adjustments
   -------------------------------------------------------------------------- */

.reveal .econ-box { margin: 0.8rem 0; font-size: 1em; }
.reveal .econ-box-head { padding: 0.4rem 0.75rem; }
.reveal .econ-box-body { padding: 0.6rem 0.75rem 0.2rem; }
.reveal .econ-eqnote { margin: 0.9rem 0; padding: 0.8rem; }
.reveal .econ-eqnote-notes { font-size: 0.86em; gap: 0.3rem; }
.reveal .econ-eqnote-note { padding: 0.25rem 0.35rem; }

/* Wide math must scroll inside its own box, never the slide. */
.reveal .econ-eqnote-math { max-width: 100%; }

/* --------------------------------------------------------------------------
   4. Print
   -------------------------------------------------------------------------- */

@media print {
  .econ-box, .econ-eqnote {
    break-inside: avoid;
    background: #fff;
  }
  .eqt { background: none !important; box-shadow: none !important; }
  .econ-eqnote-note { cursor: default; }
}

/* --------------------------------------------------------------------------
   5. The course map
   An inline SVG that states the architecture of the course. Every node is a
   button: selecting one explains what the stage asks and which lectures answer
   it. Used in Lecture 1 and on the home page, and referred back to all term.
   -------------------------------------------------------------------------- */

.coursemap {
  margin: 2rem 0;
  border: 1px solid var(--econ-rule);
  border-radius: 8px;
  background: var(--econ-surface-2);
  overflow: hidden;
}

.coursemap-figure {
  padding: 1.1rem 0.75rem 0.5rem;
  overflow-x: auto;
}

.coursemap-figure svg {
  display: block;
  width: 100%;
  min-width: 560px;
  max-width: 720px;
  height: auto;
  margin: 0 auto;
}

/* Nodes -------------------------------------------------------------------- */

.cm-node { cursor: pointer; }

.cm-node .cm-box {
  fill: var(--econ-surface);
  stroke: var(--econ-rule);
  stroke-width: 1.5;
  transition: fill 130ms ease, stroke 130ms ease, stroke-width 130ms ease;
}

.cm-node .cm-label {
  fill: var(--econ-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 13px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  user-select: none;
}

.cm-node .cm-sub {
  fill: var(--econ-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 10px;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  user-select: none;
}

.cm-node:hover .cm-box,
.cm-node:focus-visible .cm-box {
  stroke: var(--accent, var(--econ-questions));
  stroke-width: 2.2;
}

.cm-node.cm-selected .cm-box {
  fill: color-mix(in srgb, var(--accent, var(--econ-questions)) 12%, var(--econ-surface));
  stroke: var(--accent, var(--econ-questions));
  stroke-width: 2.4;
}

.cm-node:focus { outline: none; }
.cm-node:focus-visible .cm-box { outline: none; stroke-dasharray: 4 2; }

/* Per-stage accents, reusing the box palette so the whole course reads as one
   colour system: a stage and its recurring callout share a hue. */
.cm-dgp            { --accent: var(--econ-dgp); }
.cm-identification { --accent: var(--econ-connection); }
.cm-estimation     { --accent: var(--econ-questions); }
.cm-mest           { --accent: var(--econ-toolbox); }
.cm-zest           { --accent: var(--econ-montecarlo); }
.cm-asymptotics    { --accent: var(--econ-literature); }
.cm-inference      { --accent: var(--econ-connection); }
.cm-computation    { --accent: var(--econ-hood); }

/* Edges -------------------------------------------------------------------- */

.cm-edge {
  stroke: var(--econ-muted);
  stroke-width: 1.4;
  fill: none;
  opacity: 0.55;
}

.cm-arrowhead { fill: var(--econ-muted); opacity: 0.55; }

.cm-computation .cm-box {
  stroke-dasharray: 5 3;
}

/* Detail panel ------------------------------------------------------------- */

.coursemap-detail {
  padding: 0.9rem 1.15rem 1rem;
  border-top: 1px solid var(--econ-rule);
  background: var(--econ-surface);
  min-height: 5.5rem;
}

.coursemap-detail-head {
  display: flex;
  align-items: baseline;
  gap: 0.6em;
  flex-wrap: wrap;
  margin-bottom: 0.35rem;
}

.coursemap-detail-title {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.78em;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cm-accent, var(--econ-questions));
}

.coursemap-detail-where {
  font-size: 0.76em;
  color: var(--econ-muted);
}

.coursemap-detail-q {
  font-size: 1em;
  font-style: italic;
  color: var(--econ-ink);
  margin-bottom: 0.3rem;
}

.coursemap-detail-body {
  font-size: 0.9em;
  color: var(--econ-muted);
}

.coursemap-hint {
  font-size: 0.8em;
  color: var(--econ-muted);
  font-style: italic;
}

/* Reveal.js ---------------------------------------------------------------- */

.reveal .coursemap { margin: 0.5rem 0; }
.reveal .coursemap-figure { padding: 0.4rem; }
.reveal .coursemap-figure svg { min-width: 0; max-width: 560px; }
.reveal .coursemap-detail { padding: 0.5rem 0.7rem; min-height: 4rem; font-size: 0.72em; }

@media (prefers-reduced-motion: reduce) {
  .cm-node .cm-box { transition: none; }
}

/* The eighth box. Marks a derivation that is worked live on the blackboard, so
   the written proof stays condensed: the notes give the skeleton, the board
   gives the steps. Dashed, because what is written is deliberately incomplete. */
.cm-board { --accent: var(--econ-board); }

:root            { --econ-board: #7c2d12; }
.quarto-dark,
[data-bs-theme="dark"],
.reveal.dark     { --econ-board: #e8a87c; }

.econ-box-board  { --accent: var(--econ-board); }
.econ-box-board  { border-left-style: dashed; }

/* --------------------------------------------------------------------------
   6. Stage locator
   Opens every lecture: the course architecture in one strip, with the stages
   this lecture occupies lit. Makes "where are we?" structural rather than
   something the prose has to keep asserting.
   -------------------------------------------------------------------------- */

.econ-stage {
  display: block;
  margin: 0.2em 0 1.2em;
  padding: 0.5em 0.7em;
  border: 1px solid var(--econ-rule);
  border-radius: 6px;
  background: var(--econ-surface-2);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

.econ-stage-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35em;
}

.econ-stage-item,
.econ-stage-comp {
  padding: 0.12em 0.5em;
  border-radius: 3px;
  font-size: 0.62em;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--econ-muted);
  background: transparent;
  border: 1px solid transparent;
  white-space: nowrap;
}

.econ-stage-arrow {
  color: var(--econ-muted);
  opacity: 0.45;
  font-size: 0.62em;
}

.econ-stage-item.is-active {
  color: #fff;
  background: var(--stage-accent, var(--econ-questions));
  border-color: var(--stage-accent, var(--econ-questions));
}

.econ-stage-dgp.is-active            { --stage-accent: var(--econ-dgp); }
.econ-stage-identification.is-active { --stage-accent: var(--econ-connection); }
.econ-stage-estimation.is-active     { --stage-accent: var(--econ-questions); }
.econ-stage-asymptotics.is-active    { --stage-accent: var(--econ-literature); }
.econ-stage-inference.is-active      { --stage-accent: var(--econ-connection); }

.econ-stage-band {
  margin-top: 0.35em;
  padding-top: 0.3em;
  border-top: 1px dashed var(--econ-rule);
}

.econ-stage-comp {
  border-style: dashed;
  border-color: var(--econ-rule);
}

.econ-stage-comp.is-active {
  color: var(--econ-hood);
  border-color: var(--econ-hood);
  background: color-mix(in srgb, var(--econ-hood) 10%, transparent);
}

.reveal .econ-stage { margin: 0.1em 0 0.6em; padding: 0.35em 0.5em; }
.reveal .econ-stage-item,
.reveal .econ-stage-comp { font-size: 0.42em; }
.reveal .econ-stage-arrow { font-size: 0.42em; }

/* --------------------------------------------------------------------------
   7. Annotated equations under MathJax's SVG output
   With SVG output a tagged term is an <svg><g>, not a <span>. A <g> paints no
   background and no box-shadow, so the rules in §2 leave it looking untouched.
   Highlight by recolouring the glyphs instead — the ink goes from near-black to
   the accent, which reads clearly on a projector.
   -------------------------------------------------------------------------- */

g.eqt { cursor: pointer; }

g.eqt.eqt-active,
g.eqt.eqt-active use,
g.eqt.eqt-active path,
g.eqt.eqt-active rect,
g.eqt.eqt-pinned,
g.eqt.eqt-pinned use,
g.eqt.eqt-pinned path,
g.eqt.eqt-pinned rect {
  fill: var(--econ-eqt);
  stroke: var(--econ-eqt);
  stroke-width: 0;
}

/* Hovering the note card should light the term too, same as the reverse. */
g.eqt { transition: fill 120ms ease; }

@media (prefers-reduced-motion: reduce) {
  g.eqt { transition: none; }
}