/**
 * Library Flagship CSS v1.1
 *
 * Reading-first design. Prose disappears. Visual breaks erupt.
 * All values use --fc-* tokens from tokens.css.
 * Zero changes to other CSS files.
 *
 * Components:
 *   fc-lib-hero        — Title, subtitle, credibility bar
 *   fc-lib-hook        — "The short version" tinted panel
 *   fc-lib-section     — Section dividers and headings
 *   fc-lib-visual-break — Dark eruption panels (screenshot moments)
 *   fc-lib-myth-check  — Myth checkpoint (halftime crystallisation)
 *   fc-lib-takeaway    — Key takeaway accent card (rendered first in bottom section)
 *   fc-lib-bottom-stack — Stacked exclusions + methodology context blocks
 *   fc-lib-evidence    — Whispered evidence layer
 *   fc-lib-faq         — People also ask
 *   fc-lib-bridge      — Next guide bridge
 *   fc-lib-skeptic-note — Full picture dark block
 *   fc-lib-toc         — Sidebar progress TOC
 *   fc-lib-go-deeper   — Sidebar claim links
 *   fc-lib-disclaimer  — Footer disclaimer
 *
 * @package FitChef_Theme
 * @since 12.21.0
 */


/* ═══════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════ */

.fc-lib-hero {
  padding-bottom: var(--fc-space-10);
}

.fc-library-title {
  font-family: var(--fc-serif);
  font-size: var(--fc-text-hero);    /* 4.2rem — matches fc-study-title, fc-claim-title */
  font-weight: var(--fc-w-regular);
  line-height: var(--fc-lh-tight);   /* 1.06 — matches fc-study-title, fc-claim-title */
  letter-spacing: -2px;              /* matches fc-study-title, fc-claim-title */
  color: var(--fc-ink);
  margin: var(--fc-space-4) 0 var(--fc-space-5) 0;
  max-width: 840px;                  /* matches fc-study-title, fc-claim-title */
}

.fc-lib-hero__subtitle {
  font-family: var(--fc-serif);
  font-size: calc(var(--fc-text-prose) * 1.05);
  font-style: italic;
  line-height: var(--fc-lh-prose);
  color: var(--fc-dim);
  max-width: var(--fc-prose-max);
  margin: 0 0 var(--fc-space-8) 0;
}

.fc-lib-hero__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--fc-space-4);
  padding-top: var(--fc-space-5);
  border-top: 1px solid var(--fc-border);
}

.fc-lib-hero__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  font-weight: var(--fc-w-medium);
  color: var(--fc-dim);
}

.fc-lib-hero__meta-item svg {
  color: var(--fc-ghost);
  flex-shrink: 0;
}


/* ═══════════════════════════════════════════════════════
   PROSE LAYER (extends fc-article-body)
   ═══════════════════════════════════════════════════════ */

.fc-lib-prose {
  max-width: var(--fc-prose-max);
}


/* ═══════════════════════════════════════════════════════
   HOOK BLOCK — "The short version"
   ═══════════════════════════════════════════════════════ */

.fc-lib-hook {
  background: var(--fc-accent-dim);
  border: 1px solid rgba(0, 209, 142, 0.12);
  border-radius: var(--fc-radius-sm);
  padding: var(--fc-space-6) var(--fc-space-7);
  margin: var(--fc-space-8) 0;
}

.fc-lib-hook p {
  font-family: var(--fc-serif);
  font-size: var(--fc-text-prose);
  line-height: var(--fc-lh-prose);
  color: var(--fc-ink);
  margin-bottom: 1em;
}

.fc-lib-hook p:last-child {
  margin-bottom: 0;
}

.fc-lib-hook strong {
  font-weight: var(--fc-w-bold);
}


/* ═══════════════════════════════════════════════════════
   SECTION DIVIDERS + HEADINGS
   ═══════════════════════════════════════════════════════ */

.fc-lib-section-rule {
  width: 48px;
  height: 1px;
  background: var(--fc-border);
  margin-top: var(--fc-space-16);
  margin-bottom: var(--fc-space-6);
  /* scroll-margin for TOC anchor offset */
  scroll-margin-top: var(--fc-space-10);
}

.fc-lib-section-heading {
  font-family: var(--fc-sans);
  font-size: 1.55rem;
  font-weight: var(--fc-w-extrabold);
  line-height: var(--fc-lh-heading);
  letter-spacing: -0.4px;
  color: var(--fc-ink);
  margin: 0 0 var(--fc-space-8) 0;
  max-width: var(--fc-prose-max);
}


/* ═══════════════════════════════════════════════════════
   VISUAL BREAK — Dark eruption panels
   ═══════════════════════════════════════════════════════ */

.fc-lib-visual-break {
  background: var(--fc-ink);
  border-radius: var(--fc-radius);
  padding: var(--fc-space-12) var(--fc-space-8);
  padding-left: calc(var(--fc-space-8) - 1px);
  margin: var(--fc-space-10) 0;
  border-left: 3px solid var(--fc-accent);
  position: relative;
}

.fc-lib-visual-break__headline {
  font-family: var(--fc-sans);
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: var(--fc-w-semibold);
  line-height: var(--fc-lh-snug);
  letter-spacing: -0.3px;
  color: var(--fc-surface);
  max-width: 600px;
}

.fc-lib-visual-break__num {
  color: var(--fc-accent);
  font-size: 1.15em;
  font-weight: var(--fc-w-bold);
}

.fc-lib-visual-break__context {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  line-height: var(--fc-lh-relaxed);
  color: rgba(255, 255, 255, 0.5);
  max-width: 540px;
  margin-top: var(--fc-space-3);
}

/* Study source link — subtle trace to evidence */
.fc-lib-visual-break__study {
  display: inline-flex;
  align-items: center;
  gap: var(--fc-space-2);
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  font-weight: var(--fc-w-medium);
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  margin-top: var(--fc-space-5);
  transition: color 0.15s ease;
}

.fc-lib-visual-break__study:hover {
  color: var(--fc-accent);
}

.fc-lib-visual-break__study svg {
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.fc-lib-visual-break__study:hover svg {
  transform: translateX(3px);
}


/* ═══════════════════════════════════════════════════════
   MYTH CHECKPOINT
   ═══════════════════════════════════════════════════════ */

.fc-lib-myth-check {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: var(--fc-radius);
  padding: var(--fc-space-8) var(--fc-space-7);
  margin: var(--fc-space-12) 0;
}

.fc-lib-myth-check__kicker {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-micro);
  font-weight: var(--fc-w-black);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fc-accent);
  margin-bottom: var(--fc-space-3);
}

.fc-lib-myth-check__title {
  font-family: var(--fc-sans);
  font-size: 1.2rem;
  font-weight: var(--fc-w-bold);
  color: var(--fc-ink);
  margin: 0 0 var(--fc-space-6) 0;
}

.fc-lib-myth-check__item {
  background: var(--fc-bg);
  border-radius: var(--fc-radius-xs);
  padding: var(--fc-space-5) var(--fc-space-5);
  margin-bottom: var(--fc-space-3);
}

.fc-lib-myth-check__item:last-child {
  margin-bottom: 0;
}

.fc-lib-myth-check__myth {
  display: flex;
  align-items: center;
  gap: var(--fc-space-2);
  font-family: var(--fc-sans);
  font-size: var(--fc-text-ui);
  font-weight: var(--fc-w-semibold);
  color: var(--fc-danger);
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
  margin-bottom: var(--fc-space-2);
}

.fc-lib-myth-check__myth svg {
  flex-shrink: 0;
  color: var(--fc-danger);
}

.fc-lib-myth-check__reality {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-ui);
  line-height: var(--fc-lh-ui);
  color: var(--fc-body);
  padding-left: 22px; /* align with text after icon */
}


/* ═══════════════════════════════════════════════════════
   KEY TAKEAWAY
   ═══════════════════════════════════════════════════════ */

.fc-lib-takeaway {
  background: var(--fc-surface);
  border: 1.5px solid var(--fc-accent);
  border-radius: var(--fc-radius);
  padding: var(--fc-space-7) var(--fc-space-7);
  margin: var(--fc-space-12) 0 var(--fc-space-8) 0;
}

.fc-lib-takeaway__kicker {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-micro);
  font-weight: var(--fc-w-black);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fc-accent);
  margin-bottom: var(--fc-space-4);
}

.fc-lib-takeaway__body p {
  font-family: var(--fc-serif);
  font-size: var(--fc-text-prose);
  line-height: var(--fc-lh-prose);
  color: var(--fc-ink);
  margin-bottom: 1em;
}

.fc-lib-takeaway__body p:last-child {
  margin-bottom: 0;
}


/* ═══════════════════════════════════════════════════════
   BOTTOM GRID — Exclusions + Methodology side-by-side
   ═══════════════════════════════════════════════════════ */

.fc-lib-bottom-stack {
  display: flex;
  flex-direction: column;
  gap: var(--fc-space-5);
  margin: var(--fc-space-8) 0 var(--fc-space-10) 0;
}

.fc-lib-context-block {
  background: var(--fc-bg);
  border-radius: var(--fc-radius-sm);
  padding: var(--fc-space-6) var(--fc-space-6);
  border-left: 3px solid var(--fc-border);
}

.fc-lib-context-block--process {
  border-left-color: var(--fc-accent);
}

.fc-lib-context-block__kicker {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-micro);
  font-weight: var(--fc-w-black);
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--fc-dim);
  margin-bottom: var(--fc-space-2);
}

.fc-lib-context-block--process .fc-lib-context-block__kicker {
  color: var(--fc-accent);
}


.fc-lib-context-block__body p {
  font-family: var(--fc-serif);
  font-size: var(--fc-text-prose);
  line-height: var(--fc-lh-prose);
  color: var(--fc-body);
  margin-bottom: 0.85em;
}

.fc-lib-context-block__body p:last-child {
  margin-bottom: 0;
}


/* ═══════════════════════════════════════════════════════
   FAQ — People Also Ask
   ═══════════════════════════════════════════════════════ */

.fc-lib-faq {
  margin-top: var(--fc-space-10);
}

.fc-lib-faq__title {
  font-family: var(--fc-serif);
  font-size: var(--fc-text-h2);
  font-weight: var(--fc-w-semibold);
  color: var(--fc-ink);
  margin: 0 0 var(--fc-space-8) 0;
}

.fc-lib-faq__item {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: var(--fc-radius-sm);
  margin-bottom: var(--fc-space-4);
  overflow: hidden;
}

.fc-lib-faq__question {
  font-family: var(--fc-sans);
  font-size: 1.05rem;
  font-weight: var(--fc-w-semibold);
  color: var(--fc-ink);
  line-height: var(--fc-lh-snug);
  padding: var(--fc-space-5) var(--fc-space-6);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.fc-lib-faq__question::-webkit-details-marker {
  display: none;
}

.fc-lib-faq__question:hover {
  background: var(--fc-accent-dim);
}

.fc-lib-faq__chevron {
  flex-shrink: 0;
  color: var(--fc-dim);
  margin-left: var(--fc-space-4);
  transition: transform 0.2s ease;
}

.fc-lib-faq__item[open] .fc-lib-faq__chevron {
  transform: rotate(180deg);
}

.fc-lib-faq__answer {
  padding: var(--fc-space-5) var(--fc-space-6);
  border-top: 1px solid var(--fc-border-light);
}

.fc-lib-faq__answer p {
  margin-bottom: 0.85em;
}

.fc-lib-faq__answer p:last-child {
  margin-bottom: 0;
}


/* ═══════════════════════════════════════════════════════
   BRIDGE — Next guide link
   ═══════════════════════════════════════════════════════ */

.fc-lib-bridge {
  margin: var(--fc-space-8) 0;
  padding: var(--fc-space-6) 0;
  border-top: 1px solid var(--fc-border);
}

.fc-lib-bridge__text {
  font-family: var(--fc-serif);
  font-size: var(--fc-text-prose);
  font-style: italic;
  line-height: var(--fc-lh-prose);
  color: var(--fc-dim);
  margin: 0 0 var(--fc-space-3) 0;
}

.fc-lib-bridge__link {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-ui);
  font-weight: var(--fc-w-semibold);
  color: var(--fc-accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

.fc-lib-bridge__link:hover {
  color: var(--fc-accent-hover);
}


/* ═══════════════════════════════════════════════════════
   SKEPTIC NOTE — Dark "Full Picture" block
   ═══════════════════════════════════════════════════════ */

.fc-lib-skeptic-note {
  background: var(--fc-ink);
  border-radius: var(--fc-radius);
  padding: var(--fc-space-8) var(--fc-space-7);
  margin: var(--fc-space-10) 0;
}

.fc-lib-skeptic-note__header {
  display: flex;
  align-items: center;
  gap: var(--fc-space-2);
  font-family: var(--fc-sans);
  font-size: var(--fc-text-ui);
  font-weight: var(--fc-w-bold);
  color: var(--fc-surface);
  margin-bottom: var(--fc-space-5);
}

.fc-lib-skeptic-note__header svg {
  color: var(--fc-accent);
}

.fc-lib-skeptic-note__body {
  color: rgba(255, 255, 255, 0.85);
}

.fc-lib-skeptic-note__body p {
  color: rgba(255, 255, 255, 0.85);
}

.fc-lib-skeptic-note__body strong {
  color: rgba(255, 255, 255, 0.95);
  font-weight: var(--fc-w-bold);
}

.fc-lib-skeptic-note__trust {
  margin-top: var(--fc-space-6);
  padding-top: var(--fc-space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.fc-lib-skeptic-note__trust > a {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  font-weight: var(--fc-w-semibold);
  color: var(--fc-accent);
  text-decoration: none;
  display: block;
  margin-bottom: var(--fc-space-2);
}

.fc-lib-skeptic-note__trust nav {
  display: flex;
  gap: var(--fc-space-2);
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  flex-wrap: wrap;
  align-items: center;
}


.fc-lib-skeptic-note__trust nav a {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  transition: color 0.15s ease;
}

.fc-lib-skeptic-note__trust nav a:hover {
  color: rgba(255, 255, 255, 0.75);
}

.fc-lib-skeptic-note__trust nav span {
  color: rgba(255, 255, 255, 0.2);
}


/* ═══════════════════════════════════════════════════════
   WHISPERED EVIDENCE LAYER
   ═══════════════════════════════════════════════════════ */

.fc-lib-evidence {
  background: var(--fc-surface);
  border: 1px solid var(--fc-border);
  border-radius: var(--fc-radius-sm);
  margin: var(--fc-space-10) 0;
  overflow: hidden;
}

.fc-lib-evidence__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: var(--fc-space-6) var(--fc-space-6) var(--fc-space-4);
}

.fc-lib-evidence__title {
  font-family: var(--fc-sans);
  font-size: 1.15rem;
  font-weight: var(--fc-w-bold);
  color: var(--fc-ink);
  letter-spacing: -0.3px;
  margin: 0;
}

.fc-lib-evidence__stats {
  display: flex;
  gap: var(--fc-space-4);
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  color: var(--fc-dim);
}

.fc-lib-evidence__stat strong {
  font-weight: var(--fc-w-semibold);
  color: var(--fc-ink);
}

/* Evidence chain narrative */
.fc-lib-evidence__chain {
  padding: 0 var(--fc-space-6) var(--fc-space-5);
  border-bottom: 1px solid var(--fc-border-light);
}

.fc-lib-evidence__chain p {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  line-height: var(--fc-lh-ui);
  color: var(--fc-dim);
  margin: 0;
}

/* Section containers */
.fc-lib-evidence__section {
  padding: var(--fc-space-5) var(--fc-space-6) var(--fc-space-4);
}

.fc-lib-evidence__section--studies {
  border-top: 1px solid var(--fc-border-light);
}

.fc-lib-evidence__label {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-micro);
  font-weight: var(--fc-w-black);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--fc-dim);
  margin-bottom: var(--fc-space-3);
}

/* ── Claim cards ── */
.fc-lib-evidence__cards {
  display: flex;
  flex-direction: column;
  gap: var(--fc-space-2);
}

.fc-lib-evidence__claim-card {
  display: flex;
  gap: var(--fc-space-3);
  padding: var(--fc-space-3) var(--fc-space-4);
  border: 1px solid var(--fc-border);
  border-radius: var(--fc-radius-xs);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease;
}

a.fc-lib-evidence__claim-card:hover {
  border-color: var(--fc-accent);
}

.fc-lib-evidence__verdict {
  flex-shrink: 0;
  font-family: var(--fc-sans);
  font-size: 0.68rem;
  font-weight: var(--fc-w-bold);
  letter-spacing: 0.3px;
  padding: 3px 10px;
  border-radius: var(--fc-radius-pill);
  margin-top: 2px;
  height: fit-content;
  white-space: nowrap;
}

.fc-lib-evidence__verdict[data-certainty="high"] {
  background: var(--fc-verified-bg);
  color: var(--fc-verified);
}

.fc-lib-evidence__verdict[data-certainty="moderate"] {
  background: var(--fc-contested-bg);
  color: var(--fc-contested);
}

.fc-lib-evidence__verdict[data-certainty="low"] {
  background: var(--fc-emerging-bg);
  color: var(--fc-emerging);
}

.fc-lib-evidence__claim-body {
  flex: 1;
  min-width: 0;
}

.fc-lib-evidence__claim-q {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-ui);
  font-weight: var(--fc-w-medium);
  color: var(--fc-ink);
  line-height: var(--fc-lh-snug);
  margin-bottom: 3px;
}

.fc-lib-evidence__claim-v {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  color: var(--fc-dim);
  line-height: var(--fc-lh-ui);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.fc-lib-evidence__claim-meta {
  margin-top: var(--fc-space-1);
}

.fc-lib-evidence__tier {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  font-weight: var(--fc-w-medium);
}

.fc-lib-evidence__tier[data-tier="high"] {
  color: var(--fc-grade-a);
}

.fc-lib-evidence__tier[data-tier="moderate"] {
  color: var(--fc-grade-c);
}

.fc-lib-evidence__tier[data-tier="low"] {
  color: var(--fc-grade-d);
}

.fc-lib-evidence__arrow {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  align-self: center;
  color: var(--fc-ghost);
  transition: color 0.15s ease;
}

a.fc-lib-evidence__claim-card:hover .fc-lib-evidence__arrow {
  color: var(--fc-accent);
}

/* ── Study rows ── */
.fc-lib-evidence__rows {
  display: flex;
  flex-direction: column;
  gap: var(--fc-space-2);
}

.fc-lib-evidence__study-row {
  display: flex;
  align-items: center;
  gap: var(--fc-space-3);
  padding: var(--fc-space-3) var(--fc-space-4);
  border: 1px solid var(--fc-border);
  border-radius: var(--fc-radius-xs);
  transition: border-color 0.15s ease;
}

.fc-lib-evidence__study-row:hover {
  border-color: var(--fc-accent);
}

.fc-lib-evidence__design {
  flex-shrink: 0;
  font-family: var(--fc-sans);
  font-size: 0.65rem;
  font-weight: var(--fc-w-bold);
  padding: 2px 8px;
  border-radius: var(--fc-radius-pill);
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.fc-lib-evidence__design--meta {
  background: rgba(79, 70, 229, 0.08);
  color: var(--fc-design-meta);
}

.fc-lib-evidence__design--rct {
  background: var(--fc-verified-bg);
  color: var(--fc-design-rct);
}

.fc-lib-evidence__design--crossover {
  background: rgba(124, 58, 237, 0.08);
  color: var(--fc-design-cross);
}

.fc-lib-evidence__design--cohort {
  background: rgba(37, 99, 235, 0.08);
  color: var(--fc-design-cohort);
}

.fc-lib-evidence__design--dose {
  background: rgba(37, 99, 235, 0.08);
  color: var(--fc-design-cohort);
}

.fc-lib-evidence__design--other {
  background: rgba(0, 0, 0, 0.04);
  color: var(--fc-dim);
}

.fc-lib-evidence__study-body {
  flex: 1;
  min-width: 0;
}

.fc-lib-evidence__study-cite,
a.fc-lib-evidence__study-cite {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  font-weight: var(--fc-w-regular);
  color: var(--fc-ink);
  text-decoration: none;
  line-height: var(--fc-lh-snug);
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

a.fc-lib-evidence__study-cite:hover {
  color: var(--fc-accent);
}

.fc-lib-evidence__study-n {
  flex-shrink: 0;
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  color: var(--fc-dim);
  white-space: nowrap;
}

.fc-lib-evidence__study-n strong {
  font-weight: var(--fc-w-semibold);
  color: var(--fc-ink);
}

.fc-lib-evidence__doi {
  flex-shrink: 0;
  color: var(--fc-ghost);
  display: flex;
  align-items: center;
  transition: color 0.15s ease;
}

.fc-lib-evidence__doi:hover {
  color: var(--fc-accent);
}

/* ── Trust footer ── */
.fc-lib-evidence__foot {
  display: flex;
  align-items: center;
  gap: var(--fc-space-2);
  padding: var(--fc-space-3) var(--fc-space-6);
  border-top: 1px solid var(--fc-border-light);
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  color: var(--fc-ghost);
}

.fc-lib-evidence__foot svg {
  flex-shrink: 0;
  color: var(--fc-accent);
}


/* ═══════════════════════════════════════════════════════
   DISCLAIMER
   ═══════════════════════════════════════════════════════ */

.fc-lib-disclaimer {
  margin-top: var(--fc-space-10);
  padding-top: var(--fc-space-5);
  border-top: 1px solid var(--fc-border-light);
}

.fc-lib-disclaimer p {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  line-height: var(--fc-lh-ui);
  color: var(--fc-ghost);
  margin: 0;
}


/* ═══════════════════════════════════════════════════════
   SIDEBAR — Progress TOC
   ═══════════════════════════════════════════════════════ */

.fc-lib-toc {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.fc-lib-toc__item {
  display: flex;
  align-items: flex-start;
  gap: var(--fc-space-3);
  padding: 6px 0;
  text-decoration: none;
  transition: color 0.15s ease;
}

.fc-lib-toc__bar {
  width: 3px;
  min-height: 16px;
  border-radius: 1.5px;
  background: var(--fc-border);
  flex-shrink: 0;
  transition: background 0.2s ease;
  margin-top: 2px;
}

.fc-lib-toc__text {
  font-family: var(--fc-sans);
  font-size: 0.8rem;
  color: var(--fc-dim);
  line-height: 1.4;
  transition: color 0.15s ease;
}

.fc-lib-toc__item:hover .fc-lib-toc__text {
  color: var(--fc-ink);
}

.fc-lib-toc__item:hover .fc-lib-toc__bar {
  background: var(--fc-ghost);
}

/* Active state (set by JS IntersectionObserver) */
.fc-lib-toc__item.is-active .fc-lib-toc__bar {
  background: var(--fc-accent);
}

.fc-lib-toc__item.is-active .fc-lib-toc__text {
  color: var(--fc-ink);
  font-weight: var(--fc-w-semibold);
}


/* ═══════════════════════════════════════════════════════
   SIDEBAR — Section spacing for library
   ═══════════════════════════════════════════════════════ */

.fc-library-sidebar .fc-sidebar__scroll {
  gap: var(--fc-space-7);
}

.fc-library-sidebar .fc-side-section + .fc-side-section {
  padding-top: var(--fc-space-3);
  border-top: 1px solid var(--fc-border-light);
}


/* ═══════════════════════════════════════════════════════
   SIDEBAR — Evidence base overrides for library
   ═══════════════════════════════════════════════════════ */

.fc-library-sidebar .fc-side-evidence-stat {
  padding: var(--fc-space-3) 0;
}

.fc-library-sidebar .fc-side-evidence-stat + .fc-side-evidence-stat {
  border-top: 1px solid var(--fc-border-light);
}

.fc-side-evidence-stat__tiers {
  display: flex;
  gap: var(--fc-space-3);
}

.fc-side-tier {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  font-weight: var(--fc-w-semibold);
}

.fc-side-tier--high {
  color: var(--fc-grade-a);
}

.fc-side-tier--moderate {
  color: var(--fc-grade-c);
}

.fc-side-tier--low {
  color: var(--fc-grade-d);
}


/* ═══════════════════════════════════════════════════════
   SIDEBAR — Go Deeper claim links
   ═══════════════════════════════════════════════════════ */

.fc-lib-go-deeper {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--fc-space-3) var(--fc-space-4);
  border-radius: var(--fc-radius-xs);
  background: var(--fc-bg);
  border: 1px solid transparent;
  text-decoration: none;
  margin-bottom: var(--fc-space-2);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.fc-lib-go-deeper:hover {
  border-color: var(--fc-border);
  box-shadow: var(--fc-shadow);
}

.fc-lib-go-deeper__title {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-small);
  font-weight: var(--fc-w-semibold);
  color: var(--fc-ink);
  line-height: var(--fc-lh-snug);
}

.fc-lib-go-deeper__meta {
  font-family: var(--fc-sans);
  font-size: var(--fc-text-micro);
  color: var(--fc-dim);
}


/* ═══════════════════════════════════════════════════════
   RESPONSIVE — Tablet (sidebar hidden)
   ═══════════════════════════════════════════════════════ */

@media (max-width: 1199px) {
  .fc-library-title {
    font-size: var(--fc-text-h1);    /* 3rem — matches study/claim tablet behavior */
  }

  .fc-lib-visual-break {
    border-radius: var(--fc-radius-sm);
    padding: var(--fc-space-8) var(--fc-space-6);
  }

  .fc-lib-myth-check {
    padding: var(--fc-space-6) var(--fc-space-5);
  }
}


/* ═══════════════════════════════════════════════════════
   RESPONSIVE — Mobile
   ═══════════════════════════════════════════════════════ */

@media (max-width: 767px) {
  .fc-library-title {
    font-size: 1.6rem;              /* matches .fc-study-title mobile in layouts.css */
    letter-spacing: -1px;
  }

  .fc-lib-hero__subtitle {
    font-size: var(--fc-text-prose);
  }

  .fc-lib-hero__meta {
    gap: var(--fc-space-3);
  }

  .fc-lib-hero__meta-item {
    font-size: var(--fc-text-micro);
  }

  .fc-lib-section-heading {
    font-size: 1.3rem;
  }

  .fc-lib-visual-break {
    border-radius: var(--fc-radius-xs);
    padding: var(--fc-space-7) var(--fc-space-5);
    margin: var(--fc-space-8) calc(-1 * var(--fc-space-4));
  }

  .fc-lib-visual-break__headline {
    font-size: 1.1rem;
  }

  .fc-lib-visual-break__context {
    font-size: 0.8rem;
  }

  .fc-lib-myth-check {
    padding: var(--fc-space-5) var(--fc-space-4);
    border-radius: var(--fc-radius-sm);
    margin: var(--fc-space-8) 0;
  }

  .fc-lib-myth-check__title {
    font-size: 1.05rem;
  }

  .fc-lib-myth-check__myth {
    font-size: var(--fc-text-small);
  }

  .fc-lib-myth-check__reality {
    font-size: var(--fc-text-small);
  }

  .fc-lib-takeaway {
    padding: var(--fc-space-5) var(--fc-space-5);
    border-radius: var(--fc-radius-sm);
  }

  .fc-lib-bottom-stack {
    gap: var(--fc-space-4);
  }

  .fc-lib-context-block {
    padding: var(--fc-space-5) var(--fc-space-5);
  }

  .fc-lib-skeptic-note {
    padding: var(--fc-space-6) var(--fc-space-5);
    border-radius: var(--fc-radius-sm);
  }

  .fc-lib-skeptic-note__trust nav {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--fc-space-2);
  }

  .fc-lib-skeptic-note__trust nav span {
    display: none;
  }

  .fc-lib-evidence__header {
    flex-direction: column;
    gap: var(--fc-space-2);
  }

  .fc-lib-evidence__claim-card {
    padding: var(--fc-space-3);
  }

  .fc-lib-evidence__study-row {
    flex-wrap: wrap;
    padding: var(--fc-space-3);
  }

  .fc-lib-evidence__study-body {
    flex-basis: 100%;
    order: 2;
  }

  .fc-lib-evidence__design {
    order: 1;
  }

  .fc-lib-evidence__study-n {
    order: 3;
    margin-left: auto;
  }

  .fc-lib-evidence__doi {
    order: 4;
  }

  .fc-lib-faq__question {
    font-size: 0.95rem;
    padding: var(--fc-space-4) var(--fc-space-4);
  }

  .fc-lib-faq__answer {
    padding: var(--fc-space-4) var(--fc-space-4);
  }

  .fc-lib-bridge {
    padding: var(--fc-space-5) 0;
  }
}


/* ═══════════════════════════════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .fc-lib-faq__chevron,
  .fc-lib-toc__bar,
  .fc-lib-toc__t