/* CFA theme overlay — layered on top of deck-styles.css.
   Keep deck-styles.css byte-identical with the IELTS source so we can
   diff upstream changes easily; this file owns all brand deltas. */
:root {
  /* Navy accent — CFA-textbook rigor, away from IELTS red */
  --accent:       #14365F;
  --accent-dk:    #0B2140;
  --accent-soft:  rgba(20, 54, 95, 0.08);

  /* Warmer paper for long reads, cooler chrome */
  --paper:        #FAF6EF;
  --bg:           #FFFFFF;
  --bg-panel:     #F0EDE4;
  --rule:         #14365F;
  --rule-soft:    rgba(20, 54, 95, 0.16);
}

/* Title slide accent band + highlights switch to navy automatically via
   the overrides above (they reference the --accent token). Nothing else
   to patch — the IELTS stylesheet was token-first. */


/* ═════════ SHARED COMPONENTS ═════════
   Classes that exist in IELTS lesson-inline <style> blocks but NOT in
   deck-styles.css — lifted here so every CFA lesson can reuse them
   without copy-pasting the same CSS. */

/* Two-column compare — used for "A vs B" contrast slides */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.compare .cc { border-top: 4px solid var(--accent); padding-top: 28px; }
.compare .cc .head {
  font-family: var(--display);
  font-weight: 800;
  font-size: 64px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent);
  margin-bottom: 28px;
}
.compare .cc .head em { font-style: italic; font-weight: 400; color: var(--ink); }
.compare .cc dl {
  margin: 0;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  row-gap: 24px;
}
.compare .cc dt {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--ink-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
}
.compare .cc dd { margin: 0; font-size: 26px; line-height: 1.4; color: var(--ink); }
.compare .cc dd b { color: var(--accent); font-weight: 700; }

/* Section-break table-of-contents list */
.section-break .content .toc {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 2;
  list-style: none;
  padding: 0;
  margin: 0;
}
.section-break .content .toc li { display: block; }
.section-break .content .toc li.active { color: var(--accent); font-weight: 700; }

/* Fine-print footnote (reused across slides) */
.fine-muted {
  font-family: var(--mono);
  font-size: 20px;
  color: var(--ink-muted);
  letter-spacing: 0.06em;
  margin-top: 32px;
  max-width: 1440px;
}

/* Slightly tighter num-list.tight — CFA rows carry EN term + VN gloss
   so the default 16px padding crowds the footer on 4-item slides. */
.num-list.tight li { padding: 13px 0 !important; }

/* Tenets grid — 2-col × 3-row for 6 parallel items.
   Fits inside the 880px vertical budget where a stacked num-list cannot. */
.tenets-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 56px;
  margin-top: 12px;
}
.tenet {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid var(--rule-soft);
  align-items: baseline;
}
.tenet .n {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.tenet .t {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.22;
  margin-bottom: 6px;
  color: var(--ink);
}
.tenet .t em.hi { font-style: normal; color: var(--accent); font-weight: 700; }
.tenet .d {
  font-size: 19px;
  line-height: 1.4;
  color: var(--ink-soft);
}

/* ═════════ PRACTICE QUESTION COMPONENTS ═════════ */

.q-card {
  background: var(--paper);
  border-left: 6px solid var(--accent);
  padding: 26px 34px;
  margin-top: 10px;
  max-width: 1600px;
}
.q-card .q-tag {
  display: block;
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 12px;
}
.q-card .q-stem {
  font-family: var(--display);
  font-size: 23px;
  line-height: 1.5;
  color: var(--ink);
}

.q-options {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
}
.q-options li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-top: 1px solid var(--rule-soft);
  align-items: baseline;
}
.q-options li:last-child { border-bottom: 1px solid var(--rule-soft); }
.q-options .lbl {
  font-family: var(--mono);
  font-size: 24px;
  color: var(--accent);
  font-weight: 700;
}
.q-options .opt {
  font-family: var(--sans);
  font-size: 21px;
  line-height: 1.45;
  color: var(--ink);
}
.q-options li.correct .lbl,
.q-options li.correct .opt { color: var(--accent); font-weight: 600; }

/* Reasoning: three rows [tag | body] for Correct / Wrong / Wrong */
.reasoning {
  display: grid;
  gap: 0;
  margin-top: 10px;
}
.reasoning .rblock {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  padding: 18px 0;
  border-top: 1px solid var(--rule-soft);
  align-items: baseline;
}
.reasoning .rblock:last-child { border-bottom: 1px solid var(--rule-soft); }
.reasoning .rtag {
  font-family: var(--mono);
  font-size: 19px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
}
.reasoning .rblock.wrong .rtag { color: var(--ink-muted); }
.reasoning .rtext {
  font-family: var(--sans);
  font-size: 21px;
  line-height: 1.5;
  color: var(--ink);
}
.reasoning .rtext b { color: var(--accent); font-weight: 700; }

.takeaway-box {
  margin-top: 22px;
  background: var(--accent);
  color: #fff;
  padding: 22px 32px;
  max-width: 1600px;
}
.takeaway-box .tlabel {
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
  opacity: 0.72;
  margin-bottom: 6px;
}
.takeaway-box .ttext {
  font-family: var(--display);
  font-size: 22px;
  line-height: 1.4;
  font-weight: 500;
}
.takeaway-box .ttext em { font-style: italic; opacity: 0.92; }

/* Rule box — quote a formal rule or law text */
.rule-box {
  border-left: 6px solid var(--accent);
  background: var(--paper);
  padding: 22px 28px;
  font-family: var(--display);
  font-size: 22px;
  line-height: 1.5;
  color: var(--ink);
  max-width: 1600px;
  margin-top: 8px;
}
.rule-box .tag {
  display: block;
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
}

/* Formula box — mono-font equation display with highlighted variables.
   Layered framing: outer paper box (full outline + thick accent left edge)
   contains a nested white equation block with full navy border, so the
   formula stands out strongly against the slide background. */
.formula-box {
  background: var(--paper);
  border: 1px solid var(--rule-soft);
  border-left: 6px solid var(--accent);
  padding: 22px 28px 24px;
  margin: 16px 0;
  max-width: 1600px;
  color: var(--ink);
}
.formula-box .fmt-label {
  display: block;
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 14px;
}
.formula-box .eq {
  display: block;
  background: #FFFFFF;
  border: 3px solid var(--accent);
  padding: 20px 28px;
  margin: 12px 0;
  font-family: var(--mono);
  font-size: 32px;
  line-height: 1.55;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: 0.01em;
  overflow-x: auto;
}
.formula-box .eq + .eq { margin-top: 14px; }
.formula-box .eq .var {
  color: var(--accent);
  font-weight: 700;
  background: rgba(20, 54, 95, 0.08);
  padding: 0 4px;
  border-radius: 0;
}
.formula-box .eq sup { font-size: 0.62em; vertical-align: super; line-height: 0; }
.formula-box .eq sub { font-size: 0.62em; vertical-align: sub; line-height: 0; }
.formula-box .note {
  font-family: var(--sans);
  font-size: 18px;
  color: var(--ink-soft);
  margin-top: 16px;
  line-height: 1.5;
}
.formula-box .note b { color: var(--ink); font-weight: 600; }

/* Hint slide — same shell as q-card but with <mark> highlights + bullet hints */
.hint-card {
  background: var(--paper);
  border-left: 6px solid var(--accent);
  padding: 26px 34px;
  margin-top: 10px;
  max-width: 1600px;
  font-family: var(--display);
  font-size: 22px;
  line-height: 1.55;
  color: var(--ink);
}
.hint-card .h-tag {
  display: block;
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 12px;
}
.hint-card mark {
  background: rgba(20, 54, 95, 0.14);
  color: var(--accent);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 1px 4px;
  border-radius: 0;
}

.hint-list {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
}
.hint-list li {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 20px;
  padding: 14px 0;
  border-top: 1px solid var(--rule-soft);
  align-items: baseline;
}
.hint-list li:last-child { border-bottom: 1px solid var(--rule-soft); }
.hint-list .hnum {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.hint-list .htxt {
  font-family: var(--sans);
  font-size: 20px;
  line-height: 1.5;
  color: var(--ink);
}
.hint-list .htxt em { font-style: italic; color: var(--accent); font-weight: 600; }