/* First Light — Morning Pages design (landing / briefing / drill) */

.first-light-page {
  /* Match tools.html ?drill= popup (html.tools-drill-window) */
  --fl-bg: #0a192f;
  --fl-navy-900: #0a192f;
  --fl-navy-850: #122242;
  --fl-navy-800: #152a4a;
  --fl-navy-700: #1a3358;
  --fl-border: rgba(255, 255, 255, 0.1);
  --fl-border-soft: rgba(255, 255, 255, 0.08);
  --fl-gold: #f0c45b;
  --fl-eyebrow: #2a9db5;
  --fl-teal: #2a9db5;
  --fl-paper: #ffffff;
  --fl-ink: #f7fbff;
  --fl-body: #b9c8de;
  --fl-body-warm: #c8d4e8;
  --fl-muted: rgba(185, 200, 222, 0.72);
  --fl-sans: 'Archivo', system-ui, sans-serif;
  --fl-serif: 'Archivo', system-ui, sans-serif;

  min-height: 100vh;
  background: var(--fl-bg);
  color: var(--fl-body);
  font-family: var(--fl-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Scrollbars — sidebar hidden; page + panels use dark thin thumbs */
.first-light-page .fl-reader-sidebar-scroll {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.first-light-page .fl-reader-sidebar-scroll::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

html:has(body.first-light-page) {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.12) #0a192f;
}

html:has(body.first-light-page)::-webkit-scrollbar {
  width: 8px;
}

html:has(body.first-light-page)::-webkit-scrollbar-track {
  background: #0a192f;
}

html:has(body.first-light-page)::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  border: 2px solid #0a192f;
  background-clip: padding-box;
}

html:has(body.first-light-page)::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.22);
  background-clip: padding-box;
}

.first-light-page .fl-drill-modal-scroll,
.first-light-page .fl-briefing-grid--glossary .fl-glossary-list {
  scrollbar-gutter: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}

.first-light-page .fl-drill-modal-scroll::-webkit-scrollbar,
.first-light-page .fl-briefing-grid--glossary .fl-glossary-list::-webkit-scrollbar {
  width: 8px;
}

.first-light-page .fl-drill-modal-scroll::-webkit-scrollbar-track,
.first-light-page .fl-briefing-grid--glossary .fl-glossary-list::-webkit-scrollbar-track {
  background: transparent;
}

.first-light-page .fl-drill-modal-scroll::-webkit-scrollbar-thumb,
.first-light-page .fl-briefing-grid--glossary .fl-glossary-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.first-light-page button {
  width: auto;
  min-height: 0;
}

.first-light-app {
  padding-bottom: 24px;
}

.fl-wrap {
  max-width: 100%;
  margin: 0 auto;
  padding: 0;
}

.fl-col {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 0 48px;
}

/* ── ePub-style cover (portrait card · same column width as briefings) ── */

.fl-cover-page {
  animation: fl-reader-fade 0.2s ease;
  padding: 40px 0 0;
}

.fl-epub-cover {
  display: grid;
  grid-template-columns: 52fr 48fr;
  align-items: stretch;
  width: 100%;
  aspect-ratio: 5 / 8;
  min-height: 420px;
  max-height: min(92vh, 1152px);
  margin: 0 auto;
  background: var(--fl-bg);
  border: 1px solid var(--fl-border-soft);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.28);
}

.fl-epub-cover-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(20px, 5%, 36px) clamp(16px, 4%, 28px);
  background: var(--fl-bg);
  box-sizing: border-box;
  z-index: 2;
  min-width: 0;
}

.fl-epub-cover-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.fl-epub-cover-media {
  position: relative;
  min-height: 0;
  overflow: hidden;
  background: var(--fl-bg);
}

.fl-epub-cover-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: 50% 15%;
}

.fl-epub-cover-fade {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    to right,
    var(--fl-bg) 0%,
    color-mix(in srgb, var(--fl-bg) 70%, transparent) 14%,
    color-mix(in srgb, var(--fl-bg) 24%, transparent) 30%,
    transparent 44%
  );
}

.fl-epub-cover-kicker {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fl-eyebrow);
  margin: 0 0 10px;
}

.fl-epub-cover-title {
  font-family: var(--fl-serif);
  font-weight: 700;
  font-size: clamp(1.65rem, 7.5vw, 2.75rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: #fff;
  margin: 0 0 10px;
}

.fl-epub-cover-title-line {
  display: block;
}

.fl-epub-cover-accent {
  color: var(--fl-gold);
  margin-top: 0.04em;
}

.fl-epub-cover-sub {
  font-size: clamp(0.82rem, 2.8vw, 1rem);
  line-height: 1.5;
  color: var(--fl-body);
  margin: 0 0 18px;
}

.fl-epub-cover-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
}

.fl-epub-cover-stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.fl-epub-cover-stat-n {
  font-size: clamp(1.25rem, 5vw, 1.85rem);
  font-weight: 800;
  line-height: 1;
  color: var(--fl-gold);
  letter-spacing: -0.02em;
}

.fl-epub-cover-stat-n small {
  font-size: 0.72em;
  font-weight: 600;
  color: var(--fl-muted);
}

.fl-epub-cover-stat-l {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--fl-muted);
}

.fl-cover-page .fl-chap-nav {
  margin-top: 28px;
  padding: 0;
}

/* ── Landing hero (legacy · kept for reference) ── */

.fl-hero-band {
  --fl-hero-band-bg: var(--fl-bg);
  width: 100%;
  margin: 0;
  padding: 20px 0 8px;
  background-color: var(--fl-hero-band-bg);
  border-radius: 0;
  box-sizing: border-box;
}

.fl-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  width: 100%;
  margin: 0;
  padding: 0;
  gap: 0;
}

.fl-hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px 0;
  min-width: 0;
}

.fl-hero-kicker,
.fl-kicker {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fl-eyebrow);
  margin: 0 0 10px;
}

.fl-hero-title {
  font-family: var(--fl-serif);
  font-weight: 700;
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: #fff;
  margin: 0 0 12px;
}

.fl-hero-title-line {
  display: block;
}

.fl-hero-accent {
  color: var(--fl-gold);
  margin-top: 0.08em;
}

.fl-hero-sub {
  font-family: var(--fl-sans);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--fl-body);
  margin: 0 0 18px;
  max-width: 34ch;
}

.fl-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 22px 28px;
  margin: 0 0 18px;
}

.fl-hero-stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.fl-hero-stat-n {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--fl-gold);
  letter-spacing: -0.02em;
}

.fl-hero-stat-n small {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fl-muted);
  letter-spacing: 0;
}

.fl-hero-stat-l {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--fl-muted);
  opacity: 0.85;
}

.fl-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--fl-muted);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.fl-back:hover {
  color: var(--fl-gold);
}

.fl-back svg {
  width: 14px;
  height: 14px;
}

.fl-hero-media {
  margin: 0;
  padding: 0;
  overflow: hidden;
  height: 300px;
  min-width: 0;
}

.fl-hero-media-inner {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.fl-hero-media img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: 50% 15%;
}

.fl-hero-media-fade {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 10;
  pointer-events: none;
  background: linear-gradient(
    to right,
    var(--fl-hero-band-bg) 0%,
    color-mix(in srgb, var(--fl-hero-band-bg) 40%, transparent) 15%,
    transparent 40%
  );
}

@media (min-width: 900px) {
  .fl-hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
    gap: 0;
  }

  .fl-hero-copy {
    padding: 36px 28px 36px 0;
  }

  .fl-hero-media {
    position: relative;
    height: 100%;
    min-height: 0;
    align-self: stretch;
  }

  .fl-hero-media-inner {
    position: absolute;
    inset: 0;
  }

  .fl-hero-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 50% 15%;
  }
}

/* ── Landing main + sidebar (2/3 · 1/3) ── */

.fl-landing-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding: 28px 0 48px;
  border-top: 1px solid var(--fl-border-soft);
}

.fl-landing-main {
  min-width: 0;
}

.fl-landing-sidebar {
  position: sticky;
  top: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.fl-sidebar-index {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.fl-sidebar-index .fl-contents-ttl {
  font-size: 1.35rem;
  margin: 0;
}

.fl-sidebar-index .fl-contents-meta {
  margin: 0;
}

/* ── Diagnostic quick filter (landing sidebar) ── */

.fl-diagnostic {
  margin: 14px 0 6px;
  padding: 16px 14px 14px;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: linear-gradient(165deg, rgba(18, 34, 66, 0.72), rgba(10, 25, 47, 0.55));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.fl-diagnostic-title {
  margin: 0 0 6px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fl-gold);
}

.fl-diagnostic-lead {
  margin: 0 0 12px;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--fl-muted);
}

.fl-diagnostic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.fl-diagnostic-btn {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 52px;
  padding: 10px 11px;
  border-radius: 7px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(10, 25, 47, 0.45);
  color: var(--fl-body-warm);
  font-size: 0.74rem;
  font-weight: 600;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.18s, background 0.18s, color 0.18s, box-shadow 0.18s;
}

.fl-diagnostic-btn:hover {
  border-color: rgba(240, 196, 91, 0.45);
  background: linear-gradient(180deg, rgba(240, 167, 58, 0.1), rgba(240, 167, 58, 0.03));
  color: var(--fl-paper);
  box-shadow: 0 0 0 1px rgba(240, 196, 91, 0.08);
}

.fl-diagnostic-btn.is-active {
  border-color: rgba(240, 196, 91, 0.62);
  background: linear-gradient(180deg, rgba(240, 167, 58, 0.16), rgba(240, 167, 58, 0.05));
  color: var(--fl-paper);
  box-shadow: 0 0 0 1px rgba(240, 196, 91, 0.14), inset 0 0 18px rgba(240, 196, 91, 0.06);
}

.fl-diagnostic-btn:focus-visible {
  outline: 2px solid rgba(240, 196, 91, 0.75);
  outline-offset: 2px;
}

.fl-diagnostic-status {
  min-height: 1.2em;
  margin: 10px 0 0;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: rgba(240, 196, 91, 0.82);
}

.fl-toc--sidebar.fl-toc--diagnostic-active .fl-toc-btn--diagnostic-dim {
  opacity: 0.34;
}

.fl-toc--sidebar.fl-toc--diagnostic-active .fl-toc-btn--diagnostic-dim:hover {
  opacity: 0.55;
}

.fl-toc--sidebar .fl-toc-btn--diagnostic-match {
  background: linear-gradient(90deg, rgba(240, 196, 91, 0.14), rgba(240, 196, 91, 0.02));
  box-shadow: inset 2px 0 0 var(--fl-gold);
}

.fl-toc--sidebar .fl-toc-btn--diagnostic-match .fl-toc-num,
.fl-toc--sidebar .fl-toc-btn--diagnostic-match .fl-toc-name {
  color: var(--fl-gold);
}

.fl-toc--sidebar .fl-toc-btn--diagnostic-match .fl-toc-count b {
  color: var(--fl-gold);
}

/* ── Landing essay ── */

.fl-essay {
  padding: 0;
  margin: 0;
}

.fl-section-label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fl-eyebrow);
  margin-bottom: 18px;
}

.fl-essay h2 {
  font-family: var(--fl-serif);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 34px);
  line-height: 1.08;
  color: var(--fl-ink);
  letter-spacing: -0.02em;
  margin: 0 0 30px;
  max-width: 18ch;
}

.fl-lede {
  font-family: var(--fl-serif);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.5;
  color: #cdd6e0;
  margin: 0 0 26px;
}

.fl-body-serif p {
  font-family: var(--fl-serif);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.78;
  color: var(--fl-body);
  margin: 0 0 20px;
  max-width: 62ch;
  text-wrap: pretty;
}

.fl-body-serif > p:first-of-type::first-letter {
  font-family: var(--fl-serif);
  font-weight: 800;
  float: left;
  font-size: 66px;
  line-height: 0.8;
  padding: 10px 14px 0 0;
  color: var(--fl-gold);
}

.fl-body-serif em {
  color: var(--fl-body-warm);
  font-style: italic;
}

.fl-pull {
  margin: 38px 0;
  padding: 4px 0 4px 26px;
  border-left: 2px solid var(--fl-gold);
}

.fl-pull p {
  font-family: var(--fl-serif);
  font-weight: 600;
  font-size: 23px;
  line-height: 1.36;
  color: var(--fl-paper);
  font-style: italic;
  max-width: 24ch;
  margin: 0;
}

.fl-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.fl-note {
  background: linear-gradient(180deg, rgba(240, 167, 58, 0.07), rgba(240, 167, 58, 0.02));
  border: 1px solid rgba(240, 167, 58, 0.28);
  border-radius: 8px;
  padding: 22px 22px 24px;
}

.fl-note-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fl-gold);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.fl-note-label svg {
  width: 14px;
  height: 14px;
}

.fl-note p {
  font-family: var(--fl-serif);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fl-body-warm);
  margin: 0;
}

.fl-stat-strip {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border: 1px solid var(--fl-border);
  border-radius: 8px;
  overflow: hidden;
}

.fl-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--fl-navy-850);
}

.fl-stat-n {
  font-family: var(--fl-serif);
  font-size: 26px;
  color: var(--fl-paper);
  font-weight: 700;
}

.fl-stat-n small {
  font-size: 13px;
  color: var(--fl-muted);
  font-weight: 400;
}

.fl-stat-l {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fl-muted);
}

.fl-contents-ttl {
  font-family: var(--fl-serif);
  font-weight: 700;
  font-size: 30px;
  color: var(--fl-ink);
  margin: 0;
  letter-spacing: -0.015em;
}

.fl-contents-meta {
  font-size: 12.5px;
  color: var(--fl-muted);
  letter-spacing: 0.04em;
  margin: 0;
}

.fl-toc {
  display: flex;
  flex-direction: column;
}

.fl-toc-btn {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center;
  gap: 22px;
  padding: 22px 14px;
  text-align: left;
  border: 0;
  border-top: 1px solid var(--fl-border-soft);
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background 0.18s, padding 0.18s;
  width: 100%;
}

.fl-toc-btn:last-child {
  border-bottom: 1px solid var(--fl-border-soft);
}

.fl-toc-btn:hover {
  background: var(--fl-navy-850);
  padding-left: 22px;
}

.fl-toc-num {
  font-family: var(--fl-serif);
  font-weight: 800;
  font-size: 34px;
  color: var(--fl-gold);
  font-feature-settings: "lnum";
  line-height: 1;
}

.fl-toc-name {
  font-weight: 600;
  font-size: 19px;
  color: var(--fl-ink);
  letter-spacing: -0.01em;
  margin-bottom: 5px;
}

.fl-toc-btn:hover .fl-toc-name {
  color: var(--fl-gold);
}

.fl-toc-desc {
  font-family: var(--fl-serif);
  font-weight: 400;
  font-size: 15px;
  color: var(--fl-muted);
  line-height: 1.45;
  max-width: 60ch;
}

.fl-toc-count {
  display: flex;
  align-items: baseline;
  gap: 5px;
  color: var(--fl-body);
}

.fl-toc-count b {
  font-family: var(--fl-serif);
  font-size: 21px;
  color: var(--fl-paper);
  font-weight: 700;
}

.fl-toc-count span {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fl-muted);
}

/* Compact technique index in right sidebar */
.fl-toc--sidebar .fl-toc-btn {
  grid-template-columns: 32px 1fr auto;
  gap: 10px;
  padding: 12px 8px;
}

.fl-toc--sidebar .fl-toc-btn:hover {
  padding-left: 12px;
}

.fl-toc--sidebar .fl-toc-num {
  font-size: 1.15rem;
}

.fl-toc--sidebar .fl-toc-name {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.fl-toc--sidebar .fl-toc-desc {
  display: none;
}

.fl-toc--sidebar .fl-toc-count b {
  font-size: 1rem;
}

.fl-toc--sidebar .fl-toc-count span {
  font-size: 0.62rem;
}

.fl-toc-btn--coming-soon {
  opacity: 0.55;
  cursor: default;
}

.fl-toc-btn--coming-soon:hover {
  background: transparent;
  padding-left: 8px;
}

.fl-toc-btn--coming-soon .fl-toc-name {
  color: var(--fl-ink);
}

.fl-toc-soon {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #e6b800;
}

.fl-coming-soon .fl-horizon-cta a[data-fl-horizon] {
  pointer-events: none;
  opacity: 0.45;
  cursor: default;
}

/* ── Briefing view (1/3 drills + callout · 2/3 essay) ── */

.fl-briefing-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 40px;
  align-items: start;
  padding: 28px 0 48px;
  border-top: 1px solid var(--fl-border-soft);
}

.fl-briefing-main {
  min-width: 0;
}

.fl-briefing-sidebar {
  position: sticky;
  top: 20px;
  min-width: 0;
}

.fl-briefing-main .fl-chap-head {
  padding: 0;
  text-align: left;
}

.fl-briefing-main .fl-chap-head h1 {
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 34px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--fl-ink);
  margin: 0 0 30px;
  max-width: 18ch;
}

.fl-briefing-main .fl-chap-lede {
  margin-left: 0;
  max-width: 42ch;
}

.fl-briefing-main .fl-ornament {
  justify-content: flex-start;
  margin: 28px 0 32px;
}

.fl-briefing-main .fl-chap-nav {
  margin-top: 44px;
}

.fl-briefing-sidebar .fl-ex {
  grid-template-columns: 40px 1fr 52px;
  gap: 12px;
  padding: 16px 4px;
}

.fl-briefing-sidebar .fl-ex-no {
  font-size: 18px;
}

.fl-briefing-sidebar .fl-ex-nm {
  font-size: 16px;
}

.fl-briefing-sidebar .fl-ex-ds {
  font-size: 14px;
  line-height: 1.4;
}

.fl-briefing-sidebar .fl-ex-icon {
  width: 44px;
  height: 44px;
}

.fl-briefing-sidebar .fl-briefing-callout {
  margin-top: 24px;
}

.fl-briefing-sidebar .fl-briefing-callout p {
  font-size: 15px;
  line-height: 1.55;
}

.fl-chap-head {
  padding: 70px 0 0;
  text-align: center;
}

.fl-chap-no {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fl-eyebrow);
}

.fl-chap-head h1 {
  font-family: var(--fl-serif);
  font-weight: 800;
  font-size: clamp(2.2rem, 6vw, 54px);
  line-height: 1.02;
  color: var(--fl-paper);
  letter-spacing: -0.03em;
  margin: 20px 0 0;
}

.fl-chap-lede {
  font-family: var(--fl-serif);
  font-weight: 400;
  font-style: italic;
  font-size: 20px;
  line-height: 1.5;
  color: var(--fl-body-warm);
  margin: 22px auto 0;
  max-width: 30ch;
}

.fl-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 38px 0 44px;
  color: var(--fl-gold);
}

.fl-ornament .fl-ln {
  width: 54px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--fl-gold));
}

.fl-ornament .fl-ln.fl-r {
  background: linear-gradient(90deg, var(--fl-gold), transparent);
}

.fl-ornament .fl-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--fl-gold);
}

.fl-brief-body p {
  font-family: var(--fl-serif);
  font-weight: 400;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--fl-body);
  margin: 0 0 22px;
  text-wrap: pretty;
}

.fl-brief-body > p:first-of-type::first-letter {
  font-family: var(--fl-serif);
  font-weight: 800;
  float: left;
  font-size: 66px;
  line-height: 0.8;
  padding: 9px 14px 0 0;
  color: var(--fl-gold);
}

.fl-brief-body em {
  color: var(--fl-body-warm);
  font-style: italic;
}

.fl-brief-subhead {
  font-family: var(--fl-serif);
  font-size: 1.28rem;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--fl-heading, var(--fl-body));
}

.fl-chap-head .fl-brief-subhead {
  margin-top: 6px;
}

.fl-brief-body .fl-brief-subhead {
  margin-top: 28px;
}

.fl-briefing-grid--glossary {
  align-items: start;
}

.fl-briefing-grid--glossary .fl-briefing-sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.fl-briefing-grid--glossary .fl-sidebar-index {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.fl-glossary-list {
  margin: 0;
  padding: 0 4px 0 0;
}

.fl-briefing-grid--glossary .fl-glossary-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: 8px;
  scrollbar-gutter: stable;
}

.fl-glossary-list dt {
  font-weight: 700;
  font-size: 0.84rem;
  line-height: 1.35;
  color: var(--fl-gold);
  margin-top: 16px;
}

.fl-glossary-list dt:first-child {
  margin-top: 0;
}

.fl-glossary-list dd {
  margin: 5px 0 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--fl-body-warm);
}

.fl-glossary-page {
  padding: 56px 0 40px;
}

.fl-glossary-page .fl-chap-head {
  text-align: center;
}

.fl-glossary-meta {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fl-muted);
}

.fl-glossary-list--page {
  margin-top: 36px;
}

.fl-glossary-list--page dt {
  font-family: var(--fl-sans);
  font-size: 1rem;
  margin-top: 28px;
}

.fl-glossary-list--page dt:first-child {
  margin-top: 0;
}

.fl-glossary-list--page dd {
  font-family: var(--fl-serif);
  font-size: 16px;
  line-height: 1.72;
  margin-top: 8px;
  color: var(--fl-body);
}

.fl-reader-toc-ref {
  padding-top: 4px;
}

.fl-horizon-cta {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--fl-body-warm);
}

.fl-horizon-cta a,
.fl-body-serif a[data-fl-horizon],
.fl-body-serif a[data-fl-glossary] {
  color: var(--fl-teal);
  font-weight: 600;
  text-decoration: none;
}

.fl-horizon-cta a:hover,
.fl-body-serif a[data-fl-horizon]:hover,
.fl-body-serif a[data-fl-glossary]:hover {
  text-decoration: underline;
}

.fl-toc-btn--read .fl-toc-name {
  color: rgba(240, 196, 91, 0.95);
}

.fl-inset {
  margin: 36px 0;
  padding: 22px 26px;
  border-left: 2px solid var(--fl-gold);
  background: linear-gradient(90deg, rgba(240, 167, 58, 0.06), transparent);
}

.fl-inset-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fl-gold);
  margin-bottom: 10px;
}

.fl-inset p {
  font-family: var(--fl-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fl-paper);
  margin: 0;
}

.fl-inset.fl-note-box {
  border-left-color: var(--fl-teal);
  background: linear-gradient(90deg, rgba(42, 157, 181, 0.08), transparent);
}

.fl-inset.fl-note-box p {
  font-style: normal;
  font-weight: 400;
  font-size: 16px;
}

.fl-part-bridge {
  margin: 0 0 1.75rem;
  padding: 1rem 0 0;
  border-top: 1px solid rgba(42, 157, 181, 0.28);
  font-family: var(--fl-serif);
  font-size: 17px;
  line-height: 1.65;
  color: rgba(232, 214, 176, 0.9);
}

body.fl-feedback-open {
  overflow: hidden;
}

.fl-feedback-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 24px 16px;
}

.fl-feedback-modal[hidden] {
  display: none;
}

.fl-feedback-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 12, 24, 0.72);
  backdrop-filter: blur(4px);
}

.fl-feedback-panel {
  position: relative;
  width: min(100%, 420px);
  padding: 28px 26px 24px;
  border: 1px solid rgba(42, 157, 181, 0.35);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(17, 30, 56, 0.98), rgba(10, 25, 47, 0.98));
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.fl-feedback-kicker {
  margin: 0 0 8px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fl-teal, #2a9db5);
}

.fl-feedback-title {
  margin: 0 0 10px;
  font-family: var(--fl-sans, 'Archivo', sans-serif);
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 700;
  color: var(--fl-paper, #e8d6b0);
}

.fl-feedback-lede,
.fl-feedback-label,
.fl-feedback-comment-label {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--fl-body, #b9c8de);
}

.fl-feedback-dots {
  display: flex;
  gap: 14px;
  margin: 0 0 18px;
}

.fl-feedback-dot {
  width: 42px;
  height: 42px;
  border: 2px solid rgba(232, 214, 176, 0.25);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.fl-feedback-dot[data-sentiment='bad'] {
  background: rgba(239, 125, 125, 0.85);
  border-color: rgba(239, 125, 125, 0.95);
}

.fl-feedback-dot[data-sentiment='okay'] {
  background: rgba(240, 196, 91, 0.85);
  border-color: rgba(240, 196, 91, 0.95);
}

.fl-feedback-dot[data-sentiment='good'] {
  background: rgba(68, 201, 182, 0.85);
  border-color: rgba(68, 201, 182, 0.95);
}

.fl-feedback-dot.is-selected {
  transform: scale(1.08);
  box-shadow: 0 0 0 3px rgba(42, 157, 181, 0.35);
}

.fl-feedback-dot:focus-visible {
  outline: 2px solid var(--fl-gold, #f0c45b);
  outline-offset: 3px;
}

.fl-feedback-comment-label {
  display: block;
  margin-bottom: 8px;
}

.fl-feedback-optional {
  font-size: 0.92em;
  opacity: 0.75;
}

.fl-feedback-comment {
  width: 100%;
  margin: 0 0 16px;
  padding: 12px 14px;
  border: 1px solid rgba(42, 157, 181, 0.28);
  border-radius: 8px;
  background: rgba(10, 25, 47, 0.65);
  color: var(--fl-paper, #e8d6b0);
  font: inherit;
  font-size: 14px;
  line-height: 1.5;
  resize: vertical;
  box-sizing: border-box;
}

.fl-feedback-comment:focus {
  outline: 2px solid rgba(42, 157, 181, 0.55);
  outline-offset: 1px;
}

.fl-feedback-submit-form {
  display: none;
}

.fl-feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
}

.fl-feedback-submit {
  padding: 10px 18px;
  border: none;
  border-radius: 999px;
  background: var(--fl-teal, #2a9db5);
  color: #04101f;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.fl-feedback-submit:disabled {
  opacity: 0.45;
  cursor: default;
}

.fl-feedback-skip {
  padding: 8px 4px;
  border: none;
  background: transparent;
  color: rgba(185, 200, 222, 0.85);
  font: inherit;
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.fl-feedback-thanks {
  margin: 8px 0 0;
  font-family: var(--fl-serif, Georgia, serif);
  font-size: 17px;
  color: var(--fl-gold, #f0c45b);
}

.fl-feedback-continue {
  display: block;
  margin: 18px auto 0;
  padding: 10px 22px;
  border: none;
  border-radius: 999px;
  background: var(--fl-teal, #2a9db5);
  color: #04101f;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.fl-feedback-continue[hidden] {
  display: none;
}

.fl-drills-sec {
  margin-top: 54px;
  padding-top: 8px;
}

.fl-drills-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 6px;
  flex-wrap: wrap;
  gap: 8px;
}

.fl-drills-head .fl-t {
  font-family: var(--fl-serif);
  font-weight: 700;
  font-size: 27px;
  color: var(--fl-ink);
  letter-spacing: -0.015em;
}

.fl-drills-head .fl-m {
  font-size: 12px;
  color: var(--fl-muted);
  letter-spacing: 0.04em;
}

.fl-ex-list {
  display: flex;
  flex-direction: column;
}

.fl-ex {
  display: grid;
  grid-template-columns: 54px 1fr 84px;
  align-items: center;
  gap: 20px;
  padding: 22px 8px;
  border: 0;
  border-top: 1px solid var(--fl-border-soft);
  background: transparent;
  color: inherit;
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.fl-ex:last-child {
  border-bottom: 1px solid var(--fl-border-soft);
}

.fl-ex:hover {
  background: var(--fl-navy-850);
}

.fl-ex-no {
  font-family: var(--fl-serif);
  font-weight: 800;
  font-size: 21px;
  color: var(--fl-gold);
  line-height: 1;
}

.fl-ex-nm {
  font-weight: 600;
  font-size: 18px;
  color: var(--fl-ink);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.fl-ex:hover .fl-ex-nm {
  color: var(--fl-gold);
}

.fl-ex-ds {
  font-family: var(--fl-serif);
  font-weight: 400;
  font-size: 15px;
  color: var(--fl-muted);
  line-height: 1.45;
}

.fl-ex--no-diagram {
  grid-template-columns: 54px 1fr;
}

.fl-ex-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  justify-self: end;
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  opacity: 0.92;
}

.fl-ex-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.fl-ex-fb {
  justify-self: end;
}

.fl-ex-fb svg {
  height: 62px;
  display: block;
}

/* ── Exercise modal ── */

body.fl-modal-open {
  overflow: hidden;
}

.fl-drill-modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    max(10px, env(safe-area-inset-top))
    max(12px, env(safe-area-inset-right))
    max(10px, env(safe-area-inset-bottom))
    max(12px, env(safe-area-inset-left));
}

.fl-drill-modal[hidden] {
  display: none !important;
}

.fl-drill-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 25, 47, 0.9);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.fl-drill-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(720px, calc(100vw - 24px));
  max-height: calc(100dvh - 20px);
  display: flex;
  flex-direction: column;
  background: var(--fl-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  box-shadow: 0 24px 64px rgba(4, 10, 24, 0.55);
  overflow: hidden;
}

.fl-drill-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  background: transparent;
  color: var(--fl-gold);
  font-weight: 800;
  cursor: pointer;
  box-shadow:
    0 2px 12px rgba(4, 10, 24, 0.45),
    0 0 0 1px rgba(255, 255, 255, 0.1);
}

.fl-drill-modal-close:hover {
  border-color: rgba(240, 196, 91, 0.35);
  color: var(--fl-gold);
}

.fl-drill-modal-close svg {
  width: 18px;
  height: 18px;
}

.fl-drill-modal-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  padding: 56px 24px 32px;
}

.fl-drill-modal-body.fl-col {
  padding: 0;
}

.fl-drill-modal .fl-ex-head {
  padding: 0;
  text-align: left;
}

.fl-drill-modal .fl-ex-kicker {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--fl-eyebrow);
}

.fl-drill-modal .fl-ex-head h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: #fff;
  margin: 6px 0 0;
}

.fl-drill-modal .fl-ex-sub {
  font-family: var(--fl-sans);
  font-style: normal;
  font-size: 15px;
  color: var(--fl-body);
  margin: 8px 0 0;
  max-width: none;
}

.fl-drill-modal .fl-ornament {
  display: none;
}

.fl-drill-modal .fl-plate {
  margin-top: 20px;
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(18, 34, 66, 0.86);
  box-shadow: none;
}

.fl-drill-modal .fl-plate-label {
  margin-top: 10px;
  text-align: left;
  color: var(--fl-muted);
}

.fl-drill-modal .fl-plate-figrow {
  border-top-color: rgba(255, 255, 255, 0.08);
}

.fl-drill-modal .fl-figcap {
  font-family: var(--fl-sans);
  font-style: normal;
  color: var(--fl-body);
}

.fl-drill-modal .fl-method {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 20px;
}

.fl-drill-modal .fl-drill-block {
  margin: 0;
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(18, 34, 66, 0.86);
}

.fl-drill-modal .fl-drill-block--tip {
  border-color: rgba(240, 196, 91, 0.2);
  background: rgba(240, 196, 91, 0.06);
}

.fl-drill-modal .fl-tip-with-media {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 40%);
  gap: 14px 18px;
  align-items: start;
  max-width: 100%;
}

.fl-drill-modal .fl-tip-text p {
  margin: 0;
}

.fl-drill-modal .fl-tip-figure {
  margin: 0;
}

.fl-drill-modal .fl-tip-image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid rgba(240, 196, 91, 0.22);
}

.fl-drill-modal .fl-drill-block--fun-fact {
  border: 1px solid rgba(91, 196, 229, 0.26);
  border-left: 4px solid rgba(91, 196, 229, 0.65);
  background: rgba(91, 196, 229, 0.08);
}

.fl-drill-modal .fl-done-line {
  display: block;
  border-left: none;
  background: rgba(18, 34, 66, 0.86);
}

.fl-drill-modal .fl-done-line .fl-entry-label {
  display: block;
  color: var(--fl-gold);
  padding-top: 0;
  margin-bottom: 10px;
}

.fl-drill-modal .fl-done-line p {
  font-style: normal;
  font-weight: 400;
  color: var(--fl-body);
}

.fl-drill-modal .fl-entry-label {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.13em;
  color: var(--fl-gold);
  margin-bottom: 10px;
}

.fl-drill-modal .fl-entry p {
  font-family: var(--fl-sans);
  font-size: 15px;
  line-height: 1.75;
  color: var(--fl-body);
}

.fl-drill-modal .fl-twin {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.fl-drill-modal .fl-chap-nav {
  margin-top: 20px;
}

.fl-drill-modal .fl-chap-nav a,
.fl-drill-modal .fl-chap-nav button {
  border-radius: 14px;
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(18, 34, 66, 0.86);
}

.fl-drill-modal .fl-chap-nav a:hover,
.fl-drill-modal .fl-chap-nav button:hover {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(18, 34, 66, 0.96);
}

/* ── Drill content (modal + legacy) ── */

.fl-ex-head {
  padding: 64px 0 0;
  text-align: center;
}

.fl-ex-kicker {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fl-eyebrow);
}

.fl-ex-head h1 {
  font-family: var(--fl-serif);
  font-weight: 800;
  font-size: clamp(2rem, 5.5vw, 50px);
  line-height: 1.04;
  color: var(--fl-paper);
  letter-spacing: -0.03em;
  margin: 18px 0 0;
}

.fl-ex-sub {
  font-family: var(--fl-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 20px;
  color: var(--fl-body-warm);
  margin: 18px auto 0;
  max-width: 34ch;
}

.fl-plate {
  background: linear-gradient(180deg, var(--fl-navy-850), var(--fl-navy-900));
  border: 1px solid var(--fl-border);
  border-radius: 6px;
  padding: 30px 34px 26px;
  box-shadow: 0 24px 50px -28px rgba(0, 0, 0, 0.7);
  margin: 0;
}

.fl-plate-tab {
  min-height: 80px;
}

.fl-plate-tab .fret-diagram-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0 0 18px;
}

.fl-plate-tab .fret-diagram-figure:last-child {
  margin-bottom: 0;
}

.fl-plate-tab .fret-diagram-figure figcaption {
  margin: 10px 0 0;
  font-family: var(--fl-serif);
  font-style: italic;
  font-size: 14px;
  color: var(--fl-body-warm);
  text-align: center;
}

.fl-plate-tab .fb-board {
  display: grid;
  grid-template-columns: 22px 6px repeat(var(--fb-frets), minmax(0, 1fr));
  grid-template-rows: 22px repeat(4, 36px);
  background: linear-gradient(to bottom, rgba(9, 25, 52, 0.95), rgba(6, 16, 36, 0.98));
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  overflow: hidden;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  box-sizing: border-box;
}

/* Open-string column before the nut */
.fl-plate-tab .fb-board.fb-board--open {
  grid-template-columns: 22px 22px 6px repeat(var(--fb-frets), minmax(0, 1fr));
}

.fl-plate-tab .fb-board.fb-board--picking,
.fl-diagram-board .fb-board.fb-board--picking {
  --pick-view-h: 192px;
  --pick-band-h: 144px;
  --pick-band-y: 24px;
  --pick-body-w: 34%;
  display: block;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  padding: 0;
  background: linear-gradient(to bottom, rgba(9, 25, 52, 0.95), rgba(6, 16, 36, 0.98));
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  overflow: hidden;
  box-sizing: border-box;
}

.fl-plate-tab .fb-pick-main {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  position: relative;
  height: var(--pick-view-h);
  min-height: var(--pick-view-h);
  padding-right: var(--pick-body-w);
  box-sizing: border-box;
  overflow: hidden;
  --pick-string-left: 22px;
}

.fl-plate-tab .fb-pick-main--capstone {
  --pick-string-left: 26px;
}

.fl-plate-tab .fb-pick-strings {
  position: absolute;
  top: var(--pick-band-y);
  left: 0;
  right: 0;
  height: var(--pick-band-h);
  pointer-events: none;
  z-index: 4;
}

.fl-plate-tab .fb-pick-string-line {
  position: absolute;
  left: var(--pick-string-left);
  right: 0;
  height: 1.5px;
  background: rgba(232, 214, 176, 0.38);
  transform: translateY(-50%);
}

.fl-plate-tab .fb-pick-string-line--3 { top: 12.5%; }
.fl-plate-tab .fb-pick-string-line--2 { top: 37.5%; }
.fl-plate-tab .fb-pick-string-line--1 { top: 62.5%; }
.fl-plate-tab .fb-pick-string-line--0 { top: 87.5%; }

.fl-plate-tab .fb-pick-neck,
.fl-plate-tab .fb-pick-chords {
  display: grid;
  grid-template-columns: 22px 16px 6px repeat(4, 22px);
  grid-template-rows: 22px repeat(4, 36px);
  min-width: 0;
  position: relative;
  z-index: 3;
  flex-shrink: 0;
  margin-top: 2px;
}

.fl-plate-tab .fb-pick-chords--nut {
  grid-template-columns: 26px 22px 6px repeat(5, 24px);
}

.fl-plate-tab .fb-pick-chords--nut .fb-head-blank {
  visibility: hidden;
}

.fl-plate-tab .fb-pick-chords--nut .fb-string-label {
  position: relative;
  z-index: 2;
  justify-content: flex-end;
  padding-right: 6px;
  overflow: hidden;
  border-right: none;
}

.fl-plate-tab .fb-pick-chords--nut .fb-cell-fret0 {
  position: relative;
  padding: 0;
  border-left: none;
  border-right: none;
  overflow: visible;
}

.fl-plate-tab .fb-pick-chords--nut .fb-nut-bar {
  border-left: none;
  border-right: 3px solid rgba(232, 214, 176, 0.72);
  background: transparent;
  padding: 0;
}

.fl-plate-tab .fb-board.fb-board--picking .fb-pick-chords .fb-cell-fret0 .fb-shape-dot--open {
  width: 12px;
  height: 12px;
  min-width: 12px;
  max-width: 12px;
  line-height: 1;
  border-width: 2px;
  box-sizing: border-box;
}

.fl-plate-tab .fb-pick-main--capstone .fb-pick-chords {
  flex: 0 0 auto;
  border-right: none;
}

.fl-plate-tab .fb-pick-main--capstone .fb-pick-chords .fb-corner {
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
}

.fl-plate-tab .fb-pick-bridge {
  flex: 1 1 auto;
  min-width: 24px;
  position: relative;
  z-index: 2;
  align-self: stretch;
  margin-top: 2px;
}

.fl-plate-tab .fb-pick-fade {
  position: absolute;
  top: var(--pick-band-y);
  height: var(--pick-band-h);
  left: 22%;
  width: 38%;
  pointer-events: none;
  z-index: 3;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(6, 16, 36, 0.25) 25%,
    rgba(6, 16, 36, 0.88) 55%,
    rgba(72, 50, 30, 0.35) 85%,
    transparent 100%
  );
}

.fl-plate-tab .fb-pick-body {
  position: absolute;
  top: 0;
  right: 0;
  width: var(--pick-body-w);
  height: 100%;
  z-index: 1;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(118, 86, 52, 0.32) 0%, rgba(82, 58, 34, 0.48) 45%, rgba(68, 48, 28, 0.52) 100%);
  border-left: 2.5px solid rgba(232, 214, 176, 0.38);
}

.fl-plate-tab .fb-pick-body-inner {
  position: absolute;
  inset: 0;
}

.fl-plate-tab .fb-board.fb-board--picking .fb-sound-hole {
  position: absolute;
  left: 38%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 52%;
  max-width: 118px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 32%, #243448 0%, #101c2c 48%, #060c14 100%);
  border: 3px solid rgba(92, 68, 40, 0.7);
  box-shadow:
    inset 0 0 20px rgba(0, 0, 0, 0.92),
    0 0 0 1px rgba(255, 255, 255, 0.06),
    0 0 0 8px rgba(92, 68, 40, 0.22),
    0 0 0 11px rgba(140, 108, 68, 0.12);
  z-index: 1;
  pointer-events: none;
}

.fl-plate-tab .fb-pick-neck {
  flex: 1 1 auto;
}

.fl-plate-tab .fb-pick-dots {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.fl-plate-tab .fb-pick-dots--overlay {
  top: var(--pick-band-y);
  height: var(--pick-band-h);
  left: auto;
  right: 0;
  width: var(--pick-body-w);
  z-index: 5;
}

.fl-plate-tab .fb-board.fb-board--picking .fb-pick-zone-dot {
  position: absolute;
  width: 24px;
  height: 24px;
  margin: -12px 0 0 -12px;
  font-size: 11px;
  font-weight: 800;
  line-height: 24px;
  text-align: center;
  border: none;
  z-index: 5;
}

.fl-plate-tab .fb-board.fb-board--picking .fb-pick-neck .fb-cell::before,
.fl-plate-tab .fb-board.fb-board--picking .fb-pick-chords .fb-cell::before,
.fl-plate-tab .fb-board.fb-board--picking .fb-nut-bar::before {
  display: none;
}

.fl-plate-tab .fb-pick-chords--nut .fb-cell {
  position: relative;
}

.fl-plate-tab .fb-board.fb-board--picking .fb-pick-chords .fb-shape-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}

.fl-plate-tab .fb-board.fb-board--picking .fb-pick-chords .fb-shape-dot:not(.fb-shape-dot--open) {
  width: 20px;
  height: 20px;
  line-height: 20px;
  font-size: 10px;
}

.fl-diagram-board .fret-diagram-figure:has(.fb-board--picking) .fret-diagram-play-btn {
  display: none !important;
}

.fl-plate-tab .fb-corner {
  grid-column: 1;
  grid-row: 1;
}

.fl-plate-tab .fb-nut-header {
  padding: 0;
  min-width: 0;
}

.fl-plate-tab .fb-fret-header {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.62rem;
  font-weight: 600;
  color: rgba(168, 144, 112, 0.8);
}

.fl-plate-tab .fb-position-marker {
  font-size: 0.58rem;
  letter-spacing: 0.04em;
}

.fl-plate-tab .fb-string-label {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: rgba(212, 184, 150, 0.85);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.fl-plate-tab .fb-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-left: 1.5px solid rgba(232, 214, 176, 0.22);
}

.fl-plate-tab .fb-cell::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  background: rgba(232, 214, 176, 0.28);
  transform: translateY(-50%);
  pointer-events: none;
}

.fl-plate-tab .fb-cell-open {
  border-left: none;
  border-right: none;
  background: rgba(0, 0, 0, 0.15);
  padding: 0;
  min-width: 0;
  overflow: visible;
}

.fl-plate-tab .fb-nut-bar {
  border-left: none;
  border-right: 3px solid rgba(232, 214, 176, 0.72);
  background: transparent;
  padding: 0;
  min-width: 0;
}

.fl-plate-tab .fb-nut-bar::before {
  display: none;
}

.fl-plate-tab .fb-dot {
  position: relative;
  z-index: 1;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s ease, opacity 0.12s ease, box-shadow 0.1s ease;
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 800;
  color: #071832;
}

.fl-plate-tab .fb-dot-open {
  width: 14px;
  height: 14px;
  min-width: 14px;
  max-width: 14px;
  min-height: 14px;
  max-height: 14px;
  aspect-ratio: 1;
  padding: 0;
  line-height: 1;
  flex-shrink: 0;
  align-self: center;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 800;
  background: none;
  border: none;
  border-radius: 50%;
  box-sizing: content-box;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.85);
}

.fl-plate-tab .fb-dot.fb-dot--active {
  color: #071832 !important;
}

.fb-dot.fb-dot--active {
  color: #071832 !important;
}

.fl-plate-tab .fb-dot-muted {
  width: auto;
  height: auto;
  background: none !important;
  color: rgba(212, 184, 150, 0.75);
  font-size: 16px;
  font-weight: 700;
}

.fl-plate-tab .fb-scale-mantra-wrap {
  width: 100%;
  max-width: 520px;
  margin: 10px auto 0;
}

.fl-plate-tab .fb-scale-mantra-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  justify-content: center;
  margin-bottom: 10px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(212, 184, 150, 0.85);
}

.fl-plate-tab .fb-scale-key {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.fl-plate-tab .fb-scale-key-swatch {
  display: inline-block;
  height: 6px;
  border-radius: 3px;
}

.fl-plate-tab .fb-scale-key--tone .fb-scale-key-swatch {
  width: 22px;
  background: rgba(56, 220, 210, 0.75);
}

.fl-plate-tab .fb-scale-key--semi .fb-scale-key-swatch {
  width: 10px;
  background: rgba(240, 196, 91, 0.85);
}

.fl-plate-tab .fb-scale-mantra {
  display: grid;
  grid-template-columns: 22px 6px repeat(var(--fb-frets), minmax(0, 1fr));
  grid-template-rows: 22px 28px;
  gap: 4px 0;
  align-items: center;
}

.fl-plate-tab .fb-scale-mantra-nut {
  grid-column: 2;
  grid-row: 1 / 3;
  border-right: 3px solid rgba(232, 214, 176, 0.72);
}

.fl-plate-tab .fb-scale-mantra-corner {
  grid-column: 1;
  grid-row: 2;
  font-size: 0.62rem;
  font-weight: 700;
  color: rgba(212, 184, 150, 0.7);
  text-align: center;
}

.fl-plate-tab .fb-scale-bridge {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  height: 18px;
  border-radius: 9px;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #071832;
}

.fl-plate-tab .fb-scale-bridge--tone {
  background: rgba(56, 220, 210, 0.55);
  border: 1px solid rgba(56, 220, 210, 0.75);
}

.fl-plate-tab .fb-scale-bridge--semi {
  background: rgba(240, 196, 91, 0.45);
  border: 1px solid rgba(240, 196, 91, 0.7);
}

.fl-plate-tab .fb-scale-note {
  justify-self: center;
  min-width: 22px;
  padding: 2px 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.62rem;
  font-weight: 800;
  color: rgba(240, 196, 91, 0.95);
  text-align: center;
}

.fl-plate-tab .fb-chord-name {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fl-teal);
  padding: 6px 0 2px;
}

.fl-plate-figrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--fl-border-soft);
  flex-wrap: wrap;
}

.fl-figcap {
  font-family: var(--fl-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 15px;
  color: var(--fl-body-warm);
}

.fl-figcap b {
  color: var(--fl-paper);
  font-style: normal;
  font-weight: 500;
}

.fl-play {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 0;
  cursor: pointer;
  background: transparent;
  color: var(--fl-gold);
  font-family: var(--fl-sans);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  padding: 9px 18px;
  border-radius: 24px;
  box-shadow: inset 0 0 0 1px rgba(240, 167, 58, 0.5);
}

.fl-play:hover {
  background: rgba(240, 167, 58, 0.1);
}

.fl-play svg {
  width: 13px;
  height: 13px;
}

.fl-plate-tab .fret-diagram-play-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 0;
  cursor: pointer;
  background: transparent;
  color: var(--fl-gold);
  font-family: var(--fl-sans);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  padding: 9px 18px;
  border-radius: 24px;
  box-shadow: inset 0 0 0 1px rgba(240, 167, 58, 0.5);
  margin: 12px auto 0;
}

.fl-plate-tab .fret-diagram-play-btn:hover {
  background: rgba(240, 167, 58, 0.1);
}

.fl-plate-tab .fret-diagram-figure:only-child .fret-diagram-play-btn {
  display: none;
}

.fl-plate-label {
  text-align: center;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fl-muted);
  margin-top: 14px;
}

.fl-method {
  margin-top: 46px;
}

.fl-drill-intro {
  font-family: var(--fl-serif);
  font-size: 17px;
  line-height: 1.72;
  color: var(--fl-body);
  text-wrap: pretty;
  margin: 0 0 30px;
  max-width: 42rem;
}

.fl-entry {
  margin-bottom: 30px;
}

.fl-entry-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fl-gold);
  margin-bottom: 11px;
}

.fl-entry p,
.fl-entry li {
  font-family: var(--fl-serif);
  font-weight: 400;
  font-size: 16.5px;
  line-height: 1.72;
  color: var(--fl-body);
  text-wrap: pretty;
}

.fl-entry p {
  margin: 0;
}

.fl-entry-text p + p,
.fl-entry-text p + .fl-instruction-list,
.fl-entry-text p + .fl-instruction-steps,
.fl-entry-text .fl-instruction-part + .fl-instruction-steps,
.fl-entry-text .fl-instruction-list + p,
.fl-entry-text .fl-instruction-list + .fl-instruction-list,
.fl-entry-text .fl-instruction-steps + p {
  margin-top: 12px;
}

.fl-instruction-part {
  font-family: var(--fl-sans);
  font-weight: 600;
  margin: 14px 0 0;
}

.fl-instruction-steps {
  margin: 14px 0 0;
  padding-left: 1.55rem;
}

.fl-instruction-steps li {
  margin: 12px 0;
  padding-left: 0.25rem;
}

.fl-instruction-steps li::marker {
  color: var(--fl-gold);
  font-family: var(--fl-sans);
  font-size: 0.86em;
  font-weight: 800;
}

.fl-instruction-step-body p {
  margin: 0;
}

.fl-instruction-helper {
  color: var(--fl-muted) !important;
  font-family: var(--fl-sans) !important;
  font-size: 14px !important;
  line-height: 1.55 !important;
  margin-top: 4px !important;
}

.fl-instruction-list {
  margin: 12px 0 0;
  padding-left: 1.35rem;
}

.fl-instruction-list li {
  margin: 7px 0;
  padding-left: 0.15rem;
}

.fl-instruction-list li::marker {
  color: var(--fl-gold);
  font-weight: 700;
}

.fl-text-strong {
  color: var(--fl-ink);
  font-weight: 700;
}

.fl-entry-lead p {
  font-size: 16.5px;
}

.fl-note-name {
  font-family: ui-monospace, 'Courier New', monospace;
  font-style: normal;
  font-size: 0.92em;
  font-weight: 700;
  color: var(--fl-gold);
  letter-spacing: 0.01em;
}

.fl-entry-lead p.fl-instruction-multiline {
  white-space: pre-line;
}

.fl-done-line {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 6px 0 30px;
  padding: 16px 20px;
  border-left: 2px solid var(--fl-teal);
  background: linear-gradient(90deg, rgba(92, 178, 189, 0.07), transparent);
}

.fl-done-line .fl-entry-label {
  flex-shrink: 0;
  color: var(--fl-teal);
  letter-spacing: 0.16em;
  padding-top: 3px;
  margin-bottom: 0;
}

.fl-done-line p {
  font-family: var(--fl-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 16.5px;
  color: var(--fl-paper);
  line-height: 1.5;
  margin: 0;
}

.fl-self-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: -12px 0 28px;
  padding: 14px 18px;
  border: 1px solid rgba(42, 157, 181, 0.24);
  border-radius: 8px;
  background: rgba(10, 25, 47, 0.35);
  cursor: pointer;
  user-select: none;
}

.fl-self-check-input {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  accent-color: var(--fl-teal, #2a9db5);
  cursor: pointer;
}

.fl-self-check-text {
  font-family: var(--fl-sans, 'Archivo', sans-serif);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--fl-body, #b9c8de);
}

.fl-self-check:has(.fl-self-check-input:checked) {
  border-color: rgba(42, 157, 181, 0.45);
  background: rgba(42, 157, 181, 0.08);
}

.fl-self-check:has(.fl-self-check-input:checked) .fl-self-check-text {
  color: var(--fl-paper, #e8d6b0);
}

.fl-reader-toc-drill.is-self-checked .dt::after {
  content: ' ✓';
  color: var(--fl-teal, #2a9db5);
  font-weight: 700;
}

.fl-twin {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.fl-twin .fl-entry {
  margin-bottom: 0;
}

.fl-twin .fl-entry p {
  font-size: 16px;
  line-height: 1.62;
}

.fl-twin--tip-media {
  grid-template-columns: 1fr;
  gap: 24px;
}

.fl-entry--tip-media {
  max-width: 100%;
}

.fl-tip-with-media {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 40%);
  gap: 16px 22px;
  align-items: start;
  max-width: 100%;
}

.fl-tip-text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.62;
}

.fl-tip-figure {
  margin: 0;
}

.fl-tip-image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid rgba(240, 196, 91, 0.22);
}

.fl-drill-block--tip .fl-tip-image {
  border-color: rgba(240, 196, 91, 0.28);
}

/* ── Chapter nav ── */

.fl-chap-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 56px 0 0;
}

.fl-chap-nav a,
.fl-chap-nav button {
  text-decoration: none;
  border: 1px solid var(--fl-border-soft);
  border-radius: 10px;
  padding: 18px 20px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.fl-chap-nav a:hover,
.fl-chap-nav button:hover {
  border-color: var(--fl-border);
  background: var(--fl-navy-850);
}

.fl-chap-nav .fl-next {
  text-align: right;
}

.fl-chap-nav .fl-dir {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fl-muted);
  margin-bottom: 7px;
}

.fl-chap-nav .fl-ttl {
  font-family: var(--fl-serif);
  font-size: 19px;
  color: var(--fl-ink);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.fl-chap-nav a:hover .fl-ttl,
.fl-chap-nav button:hover .fl-ttl {
  color: var(--fl-gold);
}

/* ── Footer (blend with page background) ── */

.first-light-page .siteFooter {
  margin-top: 8px;
  border-top-color: var(--fl-border-soft);
  background: transparent;
}

/* Footer sits in the right-hand reader column, not under the TOC */
.fl-reader-mode .first-light-wrap:last-of-type {
  max-width: none;
  width: auto;
  margin-left: var(--fl-sidebar-w);
  margin-right: 0;
  padding: 0 40px 24px;
  box-sizing: border-box;
}

.fl-reader-mode .first-light-wrap:last-of-type .siteFooter {
  max-width: calc(var(--fl-read-w) + 220px);
  margin-left: auto;
  margin-right: auto;
}

/* ── Responsive ── */

@media (max-width: 900px) {
  .fl-col {
    padding: 0 0 40px;
  }

  .fl-landing-grid,
  .fl-briefing-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .fl-landing-sidebar,
  .fl-briefing-sidebar {
    position: static;
  }

  .fl-briefing-grid--glossary .fl-briefing-sidebar {
    overflow: visible;
  }

  .fl-briefing-grid--glossary .fl-glossary-list {
    overflow-y: visible;
  }

  .fl-briefing-main .fl-chap-head {
    padding-top: 0;
  }

  .fl-briefing-main .fl-chap-head h1 {
    max-width: none;
  }

  .fl-briefing-sidebar .fl-ex {
    grid-template-columns: 54px 1fr 52px;
    gap: 20px;
    padding: 22px 8px;
  }

  .fl-briefing-sidebar .fl-ex-icon {
    width: 48px;
    height: 48px;
  }

  .fl-briefing-sidebar .fl-ex-no {
    font-size: 21px;
  }

  .fl-briefing-sidebar .fl-ex-nm {
    font-size: 18px;
  }

  .fl-briefing-sidebar .fl-ex-ds {
    font-size: 15px;
  }

  .fl-toc--sidebar .fl-toc-desc {
    display: block;
    font-size: 0.82rem;
  }

  .fl-diagnostic-grid {
    grid-template-columns: 1fr;
  }

  .fl-toc-btn {
    grid-template-columns: 48px 1fr auto;
    gap: 14px;
    padding: 18px 10px;
  }

  .fl-toc-num {
    font-size: 28px;
  }

  .fl-twin {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .fl-tip-with-media,
  .fl-drill-modal .fl-tip-with-media {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .fl-chap-nav {
    grid-template-columns: 1fr;
  }

  .fl-chap-nav .fl-next {
    text-align: left;
  }
}

@media (max-width: 560px) {
  .fl-drill-modal {
    padding: 0;
    align-items: stretch;
  }

  .fl-drill-modal-dialog {
    width: 100%;
    max-height: 100%;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }

  .fl-drill-modal-scroll {
    padding: 0 16px 24px;
  }

  .fl-ex {
    grid-template-columns: 40px 1fr 40px;
  }

  .fl-ex-icon {
    width: 40px;
    height: 40px;
  }

  .fl-ex-fb {
    display: none;
  }

  .fl-toc-count {
    display: none;
  }

  .fl-toc-btn {
    grid-template-columns: 44px 1fr;
  }

}

/* ── Reader layout (full-width shell · fixed sidebar · inline pages) ── */

.fl-reader-mode {
  --fl-sidebar-w: 316px;
  --fl-read-w: 720px;
  --fl-nav-h: 64px;
  /* Match .fl-reader-sidebar-brand block height (padding + title stack) */
  --fl-sidebar-brand-h: 7rem;
  /* bar-in padding + crumb line + progress track */
  --fl-reader-bar-h: 2.75rem;
}

.fl-reader-mode .first-light-wrap:first-of-type {
  margin-bottom: 0;
  padding-bottom: 0;
}

.fl-reader-app {
  position: relative;
  min-height: calc(100vh - 64px);
  display: block;
  padding: 0;
}

.fl-reader-app::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(120% 80% at 78% -8%, rgba(240, 167, 58, 0.05), transparent 60%),
    radial-gradient(90% 70% at -10% 110%, rgba(92, 178, 189, 0.045), transparent 55%);
}

.fl-reader-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--fl-sidebar-w);
  z-index: 40;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, #0a1726, var(--fl-bg));
  border-right: 1px solid var(--fl-border-soft);
}

.fl-reader-sidebar-brand {
  padding: 24px 24px 18px;
  border-bottom: 1px solid var(--fl-border-soft);
}

.fl-reader-mode .fl-reader-sidebar-brand {
  box-sizing: border-box;
  min-height: var(--fl-sidebar-brand-h);
}

.fl-reader-sidebar-tag {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fl-teal);
  margin-bottom: 12px;
}

.fl-reader-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  color: inherit;
}

.fl-reader-brand-title {
  font-family: var(--fl-sans);
  font-weight: 800;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  color: var(--fl-paper);
  line-height: 1;
}

.fl-reader-brand-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fl-gold);
  transform: translateY(-2px);
}

.fl-reader-brand-tag {
  margin: 8px 0 0;
  font-size: 11.5px;
  font-style: italic;
  color: var(--fl-muted);
}

.fl-reader-sidebar-scroll {
  flex: 1;
  overflow: auto;
  padding: 14px 12px 20px;
}

.fl-reader-sidebar-scroll .fl-contents-meta {
  padding: 0 10px 10px;
  font-size: 11.5px;
}

.fl-reader-tools-link {
  margin: 0;
  padding: 16px 24px;
  border-top: 1px solid var(--fl-border-soft);
}

.fl-reader-toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.fl-reader-toc-front {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-bottom: 12px;
}

.fl-reader-toc-link {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--fl-body);
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
}

.fl-reader-toc-link:hover,
.fl-reader-toc-link.is-active {
  background: var(--fl-navy-800);
  color: var(--fl-ink);
}

.fl-reader-toc-heading {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fl-muted);
  padding: 12px 12px 8px;
}

.fl-reader-toc-chapter {
  margin-bottom: 2px;
}

.fl-reader-toc-chaprow {
  display: grid;
  grid-template-columns: 30px 1fr 16px;
  align-items: center;
  gap: 8px;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--fl-body);
  padding: 9px 12px;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
}

.fl-reader-toc-chaprow:hover,
.fl-reader-toc-chapter.is-active > .fl-reader-toc-chaprow {
  background: var(--fl-navy-800);
}

.fl-reader-toc-chaprow .cn {
  font-weight: 700;
  font-size: 13px;
  color: var(--fl-gold);
  font-variant-numeric: tabular-nums;
}

.fl-reader-toc-chaprow .ct {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--fl-ink);
  letter-spacing: -0.01em;
}

.fl-reader-toc-chaprow .chev {
  width: 14px;
  height: 14px;
  color: var(--fl-muted);
  transition: transform 0.2s ease;
}

.fl-reader-toc-chapter.is-expanded .chev {
  transform: rotate(90deg);
}

.fl-reader-toc-drills {
  list-style: none;
  margin: 0;
  padding: 2px 0 6px;
  display: none;
}

.fl-reader-toc-chapter.is-expanded .fl-reader-toc-drills {
  display: flex;
  flex-direction: column;
}

.fl-reader-toc-drill {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 8px;
  align-items: center;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--fl-muted);
  padding: 7px 12px;
  border-radius: 7px;
  font-size: 12.5px;
  cursor: pointer;
  text-align: left;
}

.fl-reader-toc-drill .dn {
  text-align: right;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.fl-reader-toc-drill .dt {
  color: var(--fl-body);
  font-weight: 500;
  line-height: 1.25;
}

.fl-reader-toc-drill:hover {
  background: var(--fl-navy-800);
}

.fl-reader-toc-drill:hover .dt {
  color: var(--fl-ink);
}

.fl-reader-toc-drill.is-active {
  background: var(--fl-navy-700);
  box-shadow: inset 0 0 0 1px var(--fl-border);
}

.fl-reader-toc-drill.is-active .dn,
.fl-reader-toc-drill.is-active .dt {
  color: var(--fl-gold);
}

.fl-reader-main {
  margin-left: var(--fl-sidebar-w);
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
}

/* Reader bar bottom border lines up with the TOC divider under the title */
.fl-reader-mode .fl-reader-main {
  margin-top: calc(var(--fl-sidebar-brand-h) - var(--fl-nav-h) - var(--fl-reader-bar-h));
}

.fl-reader-bar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(10, 25, 47, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--fl-border-soft);
}

.fl-reader-bar-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: calc(var(--fl-read-w) + 220px);
  margin: 0 auto;
  padding: 13px 40px;
}

.fl-reader-crumb {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  color: var(--fl-muted);
  min-width: 0;
}

.fl-reader-crumb b {
  color: var(--fl-body-warm);
  font-weight: 600;
}

.fl-reader-crumb .sep {
  color: #3a5067;
}

.fl-reader-crumb .now {
  color: var(--fl-ink);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fl-reader-page-count {
  font-size: 11.5px;
  color: var(--fl-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.fl-reader-progress {
  height: 2px;
  background: var(--fl-border-soft);
}

.fl-reader-progress-fill {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #d8902a, var(--fl-gold));
  transition: width 0.35s ease;
}

.fl-reader-pane {
  flex: 1;
  padding: 0 0 48px;
}

.fl-reader-col {
  max-width: var(--fl-read-w);
  margin: 0 auto;
  padding: 0 40px;
}

.fl-reader-page {
  animation: fl-reader-fade 0.2s ease;
}

@keyframes fl-reader-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* chapter + drill editorial */
.fl-reader-page.fl-chapter-page {
  padding: 60px 0 40px;
}

.fl-reader-page.fl-chapter-page .fl-briefing-main {
  width: 100%;
  max-width: none;
}

.fl-reader-page.fl-chapter-page .fl-briefing-main .fl-chap-head h1 {
  max-width: none;
}

.fl-reader-page.fl-chapter-page .fl-chap-head {
  padding: 0;
  text-align: center;
}

.fl-reader-page.fl-chapter-page .fl-chap-head h1 {
  font-weight: 800;
  font-size: clamp(2.4rem, 5vw, 56px);
  max-width: none;
  margin-bottom: 0;
}

.fl-reader-page.fl-chapter-page .fl-chap-lede {
  margin: 20px auto 0;
  max-width: 34ch;
  font-style: italic;
  font-size: 20px;
}

.fl-reader-page.fl-chapter-page .fl-brief-body {
  max-width: 64ch;
  margin-left: auto;
  margin-right: auto;
}

.fl-reader-page.fl-chapter-page .fl-briefing-main .fl-ornament {
  width: 100%;
  max-width: none;
  justify-content: center;
  margin: 38px auto 44px;
}

.fl-reader-page.fl-chapter-page .fl-brief-body p {
  font-size: 16.5px;
  line-height: 1.78;
  max-width: 64ch;
}

.fl-reader-page.fl-chapter-page .fl-brief-body p.fl-drop::first-letter {
  font-weight: 800;
  float: left;
  font-size: 70px;
  line-height: 0.78;
  padding: 9px 14px 0 0;
  color: var(--fl-gold);
}

.fl-reader-drills-sec {
  margin-top: 54px;
}

.fl-reader-drills-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 4px;
  flex-wrap: wrap;
  gap: 8px;
}

.fl-reader-drills-head .t {
  font-weight: 700;
  font-size: 26px;
  color: var(--fl-ink);
}

.fl-reader-drills-head .m {
  font-size: 12px;
  color: var(--fl-muted);
}

.fl-reader-page.fl-drill-page {
  padding: 56px 0 40px;
}

.fl-reader-page.fl-drill-page .fl-ex-head {
  padding: 0;
  text-align: center;
}

.fl-reader-page.fl-drill-page .fl-ex-head h1 {
  font-size: clamp(2rem, 5vw, 52px);
}

/* standalone-style diagram plate */
.fl-diagram-wrap {
  margin: 32px 0 10px;
}

.fl-diagram-plate {
  background: linear-gradient(180deg, var(--fl-navy-850), #0c1e30);
  border: 1px solid var(--fl-border);
  border-radius: 8px;
  padding: 30px 34px 24px;
  box-shadow: 0 26px 54px -30px rgba(0, 0, 0, 0.75);
  margin: 0;
}

.fl-diagram-board .fret-diagram-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
}

.fl-diagram-board.fl-plate-tab .fb-board {
  max-width: 100%;
  width: 100%;
}

.fl-diagram-board .fret-diagram-play-btn {
  display: none;
}

.fl-diagram-board .fret-diagram-play-btn.fl-diagram-native-play {
  display: inline-flex;
  margin-top: 12px;
}

.fl-diagram-figrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--fl-border-soft);
}

.fl-diagram-cap {
  font-style: italic;
  font-size: 15px;
  color: var(--fl-body-warm);
  line-height: 1.45;
  margin: 0;
  flex: 1;
}

.fl-diagram-play-row,
.fret-diagram-play-row {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-shrink: 0;
}

.fret-diagram-play-row {
  display: none;
}

.fl-diagram-play {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 0;
  cursor: pointer;
  background: transparent;
  color: var(--fl-gold);
  font-family: var(--fl-sans);
  font-weight: 600;
  font-size: 13.5px;
  padding: 10px 18px;
  border-radius: 24px;
  box-shadow: inset 0 0 0 1px rgba(240, 167, 58, 0.5);
  white-space: nowrap;
}

.fl-diagram-play:hover {
  background: rgba(240, 167, 58, 0.1);
}

.fl-diagram-play.is-playing {
  background: var(--fl-gold);
  color: #23170a;
  box-shadow: none;
}

.fl-diagram-play svg {
  width: 13px;
  height: 13px;
}

.fl-play-glyph {
  display: inline-flex;
  color: var(--fl-gold);
}

.fl-play-glyph svg {
  width: 26px;
  height: 26px;
  opacity: 0.85;
}

.fl-reader-pane .fl-ex.fl-reader-ex {
  grid-template-columns: 50px 1fr 70px;
}

.fl-reader-toc-toggle {
  display: none;
  position: fixed;
  left: 12px;
  bottom: 16px;
  z-index: 50;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(10, 25, 47, 0.94);
  color: inherit;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.fl-reader-toc-toggle svg {
  width: 18px;
  height: 18px;
}

.fl-reader-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 10, 18, 0.6);
  z-index: 35;
}

.fl-reader-toc.fl-toc--diagnostic-active .fl-reader-toc-chapter--dim {
  opacity: 0.38;
}

.fl-reader-toc-chapter--match > .fl-reader-toc-chaprow {
  box-shadow: inset 0 0 0 1px rgba(240, 167, 58, 0.35);
}

@media (max-width: 960px) {
  .fl-reader-sidebar {
    transform: translateX(-105%);
    transition: transform 0.28s ease;
    width: 300px;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.6);
  }

  .fl-reader-sidebar.is-open {
    transform: translateX(0);
  }

  .fl-reader-main {
    margin-left: 0;
    margin-top: 0;
  }

  .fl-reader-mode .first-light-wrap:last-of-type {
    margin-left: 0;
    padding-left: 22px;
    padding-right: 22px;
  }

  .fl-reader-toc-toggle {
    display: inline-flex;
  }

  .fl-reader-bar-in,
  .fl-reader-col {
    padding-left: 22px;
    padding-right: 22px;
  }
}