/* Lessons list + reader shared styles */

.main {
  min-height: 100vh;
  overflow-x: hidden;
}

/* Lessons hero */
.lessons-hero {
  padding: clamp(4rem, 10vh, 7rem) clamp(1.5rem, 5vw, 4rem) clamp(2rem, 6vh, 4rem);
  position: relative;
}
.lessons-hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle at center, rgba(0, 255, 136, 0.06), transparent 60%);
  pointer-events: none;
}
.lessons-hero-inner {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
}

.lessons-title {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 600;
  color: var(--fg, #F0F0F0);
  margin: 1rem 0 1.25rem;
  max-width: 900px;
}
.lessons-title em {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-weight: 400;
  color: var(--accent, #00FF88);
}

.lessons-lead {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  color: var(--muted, #9A9A9A);
  line-height: 1.55;
  max-width: 640px;
  margin: 0;
}

/* Filter bar */
.lessons-filters {
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  margin-bottom: 2rem;
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(180deg, var(--bg, #000) 60%, transparent);
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.filters-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.filters-inner::-webkit-scrollbar { display: none; }

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: transparent;
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 999px;
  color: var(--muted, #9A9A9A);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 200ms ease, color 200ms ease, background 200ms ease;
}
.filter-btn:hover {
  color: var(--fg, #E8E8E8);
  border-color: rgba(255, 255, 255, 0.15);
}
.filter-btn.is-active {
  background: rgba(0, 255, 136, 0.08);
  border-color: rgba(0, 255, 136, 0.3);
  color: var(--accent, #00FF88);
}
.filter-count {
  font-size: 0.7rem;
  opacity: 0.6;
}

/* Lessons grid */
.lessons-list {
  padding: 0 clamp(1.5rem, 5vw, 4rem) clamp(4rem, 10vh, 7rem);
}
.lessons-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.lesson-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent);
  transition: border-color 250ms ease, transform 300ms ease;
  position: relative;
  min-height: 220px;
}
.lesson-card:hover {
  border-color: rgba(0, 255, 136, 0.3);
  transform: translateY(-2px);
}
.lesson-card:hover .lesson-card-arrow {
  transform: translateX(4px);
  color: var(--accent, #00FF88);
}

.lesson-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.lesson-num {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 1.75rem;
  color: var(--accent, #00FF88);
  line-height: 1;
}

.lesson-level {
  display: inline-block;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.55rem;
  border-radius: 4px;
}
.lesson-level--beginner {
  background: rgba(0, 255, 136, 0.10);
  color: var(--accent, #00FF88);
  border: 1px solid rgba(0, 255, 136, 0.2);
}
.lesson-level--intermediate {
  background: rgba(255, 191, 0, 0.08);
  color: #FFBF00;
  border: 1px solid rgba(255, 191, 0, 0.2);
}
.lesson-level--advanced {
  background: rgba(255, 90, 90, 0.08);
  color: #FF7070;
  border: 1px solid rgba(255, 90, 90, 0.2);
}

.lesson-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--fg, #F0F0F0);
  margin: 0 0 0.5rem;
  line-height: 1.25;
}
.lesson-card p {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--muted, #9A9A9A);
  margin: 0 0 auto;
}

.lesson-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.5rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--muted, #6B6B6B);
}
.lesson-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.lesson-card-meta i {
  width: 14px;
  height: 14px;
}
.lesson-card-arrow {
  color: var(--muted, #6B6B6B);
  transition: transform 250ms ease, color 250ms ease;
}


/* ─── Reader ─── */

.reader-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  z-index: 100;
}
.reader-progress-bar {
  height: 100%;
  width: 0;
  background: var(--accent, #00FF88);
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.6);
  transition: width 60ms linear;
}

.reader-main {
  padding: clamp(5rem, 10vh, 7rem) clamp(1.5rem, 5vw, 4rem) clamp(4rem, 10vh, 6rem);
}

.reader-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  max-width: 720px;
  margin: 0 auto 3rem;
  padding: 0;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--muted, #9A9A9A);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color 200ms ease;
  width: 100%;
}
.reader-back:hover {
  color: var(--accent, #00FF88);
}
.reader-back i { width: 14px; height: 14px; }

.reader-article {
  max-width: 720px;
  margin: 0 auto;
}

.reader-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--dim, #1F1F1F);
}

.reader-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.reader-meta .lesson-num {
  font-size: 1.5rem;
}
.reader-time {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--muted, #6B6B6B);
  letter-spacing: 0.05em;
}
.reader-time i { width: 13px; height: 13px; }

.reader-title {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 600;
  color: var(--fg, #F5F5F5);
  margin: 0 0 1rem;
}

.reader-summary {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  font-style: italic;
  color: var(--muted, #B0B0B0);
  line-height: 1.4;
  margin: 0;
}

/* Article typography */
.reader-body {
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--fg, #DDD);
}
.reader-body > * + * { margin-top: 1.25rem; }

.reader-body h2 {
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg, #F5F5F5);
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.reader-body h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--fg, #F5F5F5);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.reader-body p {
  color: #C8C8C8;
}
.reader-body strong {
  color: var(--fg, #F5F5F5);
  font-weight: 600;
}
.reader-body code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.9em;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.15);
  color: var(--accent, #00FF88);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

.reader-body ul,
.reader-body ol {
  padding-left: 1.5rem;
  color: #C8C8C8;
}
.reader-body ul li,
.reader-body ol li {
  margin-bottom: 0.5rem;
}
.reader-body ul {
  list-style: none;
  padding-left: 0;
}
.reader-body ul li {
  position: relative;
  padding-left: 1.5rem;
}
.reader-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent, #00FF88);
  opacity: 0.6;
}

.reader-body blockquote {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 2px solid var(--accent, #00FF88);
  background: rgba(0, 255, 136, 0.03);
  border-radius: 0 8px 8px 0;
}
.reader-body blockquote p {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 1.1rem;
  color: #DDD;
  margin: 0;
}

/* Practice CTA at end of article */
.reader-cta {
  margin: 4rem 0 3rem;
  padding: 2.5rem 2rem;
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 14px;
  background:
    radial-gradient(circle at 100% 0%, rgba(0, 255, 136, 0.06), transparent 60%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
  text-align: left;
}
.reader-cta h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg, #F5F5F5);
  margin: 1rem 0 0.5rem;
}
.reader-cta p {
  color: var(--muted, #9A9A9A);
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Reader nav */
.reader-nav {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--dim, #1F1F1F);
}

.reader-nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.15rem 1.35rem;
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 12px;
  color: var(--fg, #E8E8E8);
  text-decoration: none;
  transition: border-color 250ms ease, transform 300ms ease;
}
.reader-nav-link:hover {
  border-color: rgba(0, 255, 136, 0.3);
  transform: translateY(-2px);
}
.reader-nav-link i {
  width: 18px;
  height: 18px;
  color: var(--accent, #00FF88);
  flex-shrink: 0;
}

.reader-nav-back {
  justify-content: center;
}
.reader-nav-back span {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

.reader-nav-next {
  justify-content: space-between;
}
.reader-nav-next div {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
  flex: 1;
}
.reader-nav-next small {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted, #6B6B6B);
}
.reader-nav-next span {
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--fg, #E8E8E8);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}


/* Responsive */

@media (max-width: 900px) {
  .lessons-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .lessons-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .lesson-card {
    min-height: 0;
    padding: 1.5rem 1.25rem;
  }
  .reader-body { font-size: 1rem; }
  .reader-body h2 { font-size: 1.35rem; margin-top: 2.5rem; }
  .reader-body blockquote {
    padding: 1rem 1.15rem;
    margin: 1.5rem 0;
  }
  .reader-cta {
    padding: 2rem 1.5rem;
  }
  .reader-nav {
    grid-template-columns: 1fr;
  }
  .filter-btn {
    padding: 0.5rem 0.85rem;
    font-size: 0.72rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-card,
  .reader-nav-link,
  .lesson-card-arrow {
    transition: none !important;
  }
}


/* Alias new catalog-card class to existing lesson-card styles */
.catalog-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent);
  transition: border-color 250ms ease, transform 300ms ease;
  position: relative;
  min-height: 220px;
}
.catalog-card:hover {
  border-color: rgba(0, 255, 136, 0.3);
  transform: translateY(-2px);
}
.catalog-card.is-done {
  border-color: rgba(0, 255, 136, 0.25);
  background:
    linear-gradient(180deg, rgba(0, 255, 136, 0.03), transparent),
    linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent);
}

.cc-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.cc-num {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 1.75rem;
  color: var(--accent, #00FF88);
  line-height: 1;
}

.cc-done {
  position: absolute;
  top: 1.75rem;
  right: 5.5rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent, #00FF88);
  padding: 0.3rem 0.55rem;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 4px;
}

.cc-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--fg, #F0F0F0);
  margin: 0 0 0.5rem;
  line-height: 1.25;
}

.cc-desc {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--muted, #9A9A9A);
  margin: 0 0 auto;
}

.cc-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.5rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--muted, #6B6B6B);
}
.cc-time {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.cc-time i { width: 14px; height: 14px; }
.cc-start {
  color: var(--accent, #00FF88);
  transition: transform 250ms ease;
}
.catalog-card:hover .cc-start {
  transform: translateX(3px);
}


/* Filter button active state (matches lessons.js which uses .active) */
.filter-btn.active {
  background: rgba(0, 255, 136, 0.08);
  border-color: rgba(0, 255, 136, 0.3);
  color: var(--accent, #00FF88);
}


/* Catalog progress bar */
.catalog-progress {
  padding: 0 clamp(1.5rem, 5vw, 4rem) 1rem;
}
.cp-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 12px;
}
.cp-info {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.6rem;
}
.cp-label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted, #7A7A7A);
}
.cp-count {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--fg, #E8E8E8);
}
.cp-bar {
  height: 4px;
  background: var(--dim, #1F1F1F);
  border-radius: 2px;
  overflow: hidden;
}
.cp-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, rgba(0, 255, 136, 0.7), var(--accent, #00FF88));
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.4);
  transition: width 500ms cubic-bezier(0.16, 1, 0.3, 1);
}


/* Reader states (loading, error) */
.reader-state {
  max-width: 480px;
  margin: 4rem auto 0;
  padding: 3rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.reader-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--dim, #1F1F1F);
  border-top-color: var(--accent, #00FF88);
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.reader-state-label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.85rem;
  color: var(--muted, #9A9A9A);
  letter-spacing: 0.05em;
}

.reader-state--error {
  padding: 3rem 2rem;
  background: rgba(255, 90, 90, 0.03);
  border: 1px solid rgba(255, 90, 90, 0.15);
  border-radius: 14px;
}
.reader-error-icon {
  width: 36px;
  height: 36px;
  color: #FF7070;
}
.reader-error-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--fg, #F0F0F0);
  margin: 0;
  letter-spacing: -0.02em;
}
.reader-error-msg {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.8rem;
  color: var(--muted, #9A9A9A);
  margin: 0 0 1rem;
  word-break: break-all;
}


/* Reader layout: TOC sidebar + main article */
.reader-content-wrap {
  max-width: 1080px;
  margin: 0 auto;
}
.reader-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
}


/* TOC sidebar */
.reader-toc {
  position: sticky;
  top: 5rem;
  padding: 1.5rem 1.25rem;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 14px;
  align-self: start;
}
.toc-progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.toc-bar {
  flex: 1;
  height: 3px;
  background: var(--dim, #1F1F1F);
  border-radius: 2px;
  overflow: hidden;
}
.toc-fill {
  height: 100%;
  width: 0;
  background: var(--accent, #00FF88);
  transition: width 400ms ease;
}
.toc-pct {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.7rem;
  color: var(--muted, #9A9A9A);
  min-width: 2.5rem;
  text-align: right;
}
.toc-label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted, #7A7A7A);
  margin: 0 0 0.75rem;
}
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.toc-list li a {
  display: block;
  padding: 0.45rem 0.55rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: var(--muted, #9A9A9A);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
  transition: color 200ms ease, background 200ms ease, border-color 200ms ease;
}
.toc-list li a:hover {
  color: var(--fg, #E8E8E8);
  background: rgba(255, 255, 255, 0.02);
}
.toc-list li a.toc-active {
  color: var(--accent, #00FF88);
  border-left-color: var(--accent, #00FF88);
  background: rgba(0, 255, 136, 0.05);
}


/* Reader meta bar (level pill + duration) */
.reader-meta-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--dim, #1F1F1F);
}
.lesson-level.level-beginner {
  background: rgba(0, 255, 136, 0.10);
  color: var(--accent, #00FF88);
  border: 1px solid rgba(0, 255, 136, 0.2);
}
.lesson-level.level-intermediate {
  background: rgba(255, 191, 0, 0.08);
  color: #FFBF00;
  border: 1px solid rgba(255, 191, 0, 0.2);
}
.lesson-level.level-advanced {
  background: rgba(255, 90, 90, 0.08);
  color: #FF7070;
  border: 1px solid rgba(255, 90, 90, 0.2);
}
.lesson-level.level-beginner,
.lesson-level.level-intermediate,
.lesson-level.level-advanced {
  display: inline-block;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
}
.reader-duration {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--muted, #9A9A9A);
  letter-spacing: 0.05em;
}


/* Reader hero */
.reader-hero-icon {
  font-size: 3.5rem;
  line-height: 1;
  margin-bottom: 1.25rem;
  filter: drop-shadow(0 0 20px rgba(0, 255, 136, 0.2));
}
.reader-hero-icon[data-done="true"]::after {
  content: '✓';
  display: inline-block;
  margin-left: 0.5rem;
  color: var(--accent, #00FF88);
  font-size: 2rem;
  vertical-align: middle;
}


/* Body section blocks */
#lesson-sections > * + * {
  margin-top: 2rem;
}

.ls-text {
  font-family: 'Inter', sans-serif;
}
.ls-text h3 {
  font-family: 'Inter', sans-serif;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--fg, #F5F5F5);
  letter-spacing: -0.02em;
  margin: 0 0 0.85rem;
  line-height: 1.3;
}
.ls-text p {
  font-size: 1.02rem;
  line-height: 1.7;
  color: #C8C8C8;
  margin: 0;
}


.ls-example {
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 14px;
}
.ls-example-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted, #7A7A7A);
  margin-bottom: 1rem;
}
.ls-example-header .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot-red { background: #FF7070; }
.dot-green { background: var(--accent, #00FF88); }

.ls-example-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.ls-ex-col {
  padding: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  border: 1px solid var(--dim, #1F1F1F);
}
.ls-ex-label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 0.6rem;
}
.ls-ex-label.fake { color: #FF9494; }
.ls-ex-label.real { color: var(--accent, #00FF88); }
.ls-ex-value {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--fg, #E8E8E8);
  margin: 0;
  word-break: break-word;
}
.ls-example-explanation {
  padding: 0.9rem 1rem;
  background: rgba(0, 255, 136, 0.05);
  border: 1px solid rgba(0, 255, 136, 0.15);
  border-radius: 8px;
  font-size: 0.9rem;
  line-height: 1.55;
  color: #C8C8C8;
}


.ls-warning {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.15rem 1.35rem;
  background: rgba(255, 191, 0, 0.05);
  border: 1px solid rgba(255, 191, 0, 0.25);
  border-radius: 12px;
  border-left-width: 3px;
}
.ls-warning-icon {
  font-size: 1.15rem;
  line-height: 1.4;
  flex-shrink: 0;
}
.ls-warning p {
  font-family: 'Inter', sans-serif;
  font-size: 0.98rem;
  line-height: 1.6;
  color: #E8D590;
  margin: 0;
}


/* Quiz block */
.quiz-block {
  margin-top: 4rem;
  padding: 2rem;
  background:
    radial-gradient(circle at 100% 0%, rgba(0, 255, 136, 0.06), transparent 60%),
    rgba(255, 255, 255, 0.015);
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 16px;
}
.quiz-block-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--dim, #1F1F1F);
}
.quiz-block-header .section-label {
  display: block;
  margin-bottom: 0.4rem;
}
.quiz-block-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--fg, #F5F5F5);
  letter-spacing: -0.02em;
  margin: 0;
}


/* Quiz questions */
.quiz-question {
  padding: 1.5rem 0;
  border-top: 1px solid var(--dim, #1F1F1F);
}
.quiz-question:first-child { border-top: 0; padding-top: 0; }

.qq-number {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent, #00FF88);
  margin: 0 0 0.85rem;
}
.qq-text {
  font-family: 'Inter', sans-serif;
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--fg, #F0F0F0);
  margin: 0 0 1.25rem;
  letter-spacing: -0.01em;
}


/* Quiz options */
.qq-options {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.qq-option {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--dim, #1F1F1F);
  border-radius: 10px;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--fg, #E8E8E8);
  text-align: left;
  cursor: pointer;
  line-height: 1.4;
  transition: border-color 200ms ease, background 200ms ease, transform 150ms ease;
}
.qq-option:hover:not(:disabled) {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
  transform: translateX(2px);
}
.qq-option:disabled {
  cursor: default;
  transform: none;
}
.qq-option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  background: var(--dim, #1F1F1F);
  border-radius: 6px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted, #9A9A9A);
  margin-top: 0.05em;
}
.qq-option.selected {
  border-color: rgba(0, 255, 136, 0.4);
  background: rgba(0, 255, 136, 0.05);
}
.qq-option.selected .qq-option-letter {
  background: var(--accent, #00FF88);
  color: #000;
}
.qq-option.correct {
  border-color: rgba(0, 255, 136, 0.5);
  background: rgba(0, 255, 136, 0.08);
  color: var(--fg, #F0F0F0);
}
.qq-option.correct .qq-option-letter {
  background: var(--accent, #00FF88);
  color: #000;
}
.qq-option.wrong {
  border-color: rgba(255, 90, 90, 0.5);
  background: rgba(255, 90, 90, 0.06);
}
.qq-option.wrong .qq-option-letter {
  background: #FF7070;
  color: #000;
}


/* Explanation shown after submit */
.qq-explanation {
  display: none;
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  background: rgba(0, 255, 136, 0.05);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-left-width: 3px;
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  line-height: 1.55;
  color: #C8C8C8;
}
.qq-explanation.show {
  display: block;
}


/* Quiz submit button */
.quiz-submit-btn {
  margin-top: 2rem;
  width: 100%;
  justify-content: center;
  padding-block: 1rem;
}


/* Quiz result */
.quiz-result {
  margin-top: 2rem;
  padding: 2rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(0, 255, 136, 0.25);
  border-radius: 14px;
  text-align: center;
}
.qr-score-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.qr-score-label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted, #7A7A7A);
}
.qr-score {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 3rem;
  line-height: 1;
  color: var(--accent, #00FF88);
}
.qr-label {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 1.2rem;
  color: var(--fg, #E8E8E8);
  margin: 0 0 1.5rem;
}
.qr-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.25rem;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 12px;
  margin-bottom: 1.5rem;
  text-align: left;
}
.qr-badge i {
  width: 28px;
  height: 28px;
  color: var(--accent, #00FF88);
}
.qr-badge-lbl {
  display: block;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted, #7A7A7A);
  margin-bottom: 0.15rem;
}
.qr-badge-name {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg, #F0F0F0);
}
.qr-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}


/* Responsive */
@media (max-width: 900px) {
  .reader-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .reader-toc {
    position: static;
    order: 2;
  }
  .reader-article {
    order: 1;
  }
}

@media (max-width: 640px) {
  .catalog-card {
    min-height: 0;
    padding: 1.5rem 1.25rem;
  }
  .cc-done {
    top: 1.5rem;
    right: 5rem;
  }
  .reader-layout {
    gap: 1.5rem;
  }
  .reader-hero-icon {
    font-size: 2.75rem;
  }
  .quiz-block {
    padding: 1.5rem 1.25rem;
  }
  .ls-example-body {
    grid-template-columns: 1fr;
  }
  .qq-option {
    font-size: 0.9rem;
    padding: 0.85rem 0.9rem;
  }
  .qr-score {
    font-size: 2.5rem;
  }
  .qr-badge {
    flex-direction: column;
    text-align: center;
  }
}