/* Web3 Nepal — Public Learning Notes (lpl.css) */
:root {
  --accent:       #0d9488;
  --accent-dark:  #0f766e;
  --accent-mid:   #5eead4;
  --accent-light: #f0fdfa;
  --accent-glow:  rgba(13,148,136,0.15);
  --ink:          #0a0a0a;
  --body:         #374151;
  --muted:        #6b7280;
  --dim:          #9ca3af;
  --border:       #e5e7eb;
  --border-2:     #f3f4f6;
  --mono:         'JetBrains Mono', 'Courier New', monospace;
}

/* ─── Reader layout ─── */
.lpl-layout {
  display: flex;
  min-height: calc(100vh - 60px);
  margin-top: 60px;
  background: #fff;
}

/* ─── Sidebar ─── */
.lpl-sidebar {
  width: 272px;
  flex-shrink: 0;
  background: #f9fafb;
  border-right: 1px solid var(--border);
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #d1d5db transparent;
}
.lpl-sidebar::-webkit-scrollbar { width: 3px; }
.lpl-sidebar::-webkit-scrollbar-track { background: transparent; }
.lpl-sidebar::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 2px; }

.lpl-sidebar-inner { padding: 1.25rem 0; }

.lpl-course-back {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 1.25rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
  transition: color 0.15s;
}
.lpl-course-back:hover { color: var(--accent-dark); }

/* ─── Outline (generated by helpers.php) ─── */
.lpl-outline { }

.lpl-outline-header {
  padding: 0.75rem 1.25rem;
  background: var(--accent);
}
.lpl-outline-course-link {
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  display: block;
  line-height: 1.4;
}
.lpl-outline-course-link:hover { color: rgba(255,255,255,0.88); }

.lpl-outline-group { border-bottom: 1px solid var(--border-2); }
.lpl-outline-group:last-child { border-bottom: none; }

.lpl-outline-group__label {
  padding: 0.55rem 1.25rem 0.3rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  background: #f9fafb;
  display: none; /* replaced by accordion button via JS */
}

/* Accordion toggle button (built by lpl.js) */
.lpl-group-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  padding: 0.55rem 1.25rem;
  background: #f9fafb;
  border: none;
  border-bottom: 1px solid var(--border-2);
  cursor: pointer;
  text-align: left;
  font: inherit;
  transition: background 0.15s;
}
.lpl-group-toggle:hover { background: var(--accent-light); }

.lpl-group-toggle__title {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  line-height: 1.4;
}

.lpl-group-toggle__indicator {
  position: relative;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
}
.lpl-group-toggle__indicator::before,
.lpl-group-toggle__indicator::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 8px; height: 1.5px;
  background: #fff;
  transform: translate(-50%, -50%);
}
.lpl-group-toggle__indicator::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: opacity 0.15s;
}
.lpl-group-toggle[aria-expanded="true"] .lpl-group-toggle__indicator::after { opacity: 0; }

.lpl-outline-group__list { list-style: none; margin: 0; padding: 0; }
.lpl-outline-group__list[hidden] { display: none !important; }

.lpl-note-item { border-bottom: 1px solid var(--border-2); }
.lpl-note-item:last-child { border-bottom: none; }

.lpl-note-item a {
  display: block;
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  line-height: 1.4;
  border-left: 2px solid transparent;
  transition: all 0.15s;
}
.lpl-note-item a:hover {
  background: var(--accent-light);
  color: var(--accent-dark);
  border-left-color: var(--accent-mid);
}
.lpl-note-item.lpl-active a {
  background: var(--accent-light);
  color: var(--accent-dark);
  font-weight: 600;
  border-left-color: var(--accent);
}

/* ─── Main content ─── */
.lpl-main {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 3.5rem 5rem;
  background: #fff;
}

/* Mobile sidebar toggle */
.lpl-sidebar-toggle {
  display: none;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-light);
  border: 1px solid var(--accent-mid);
  color: var(--accent-dark);
  padding: 0.4rem 1rem;
  border-radius: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 1.5rem;
  transition: all 0.15s;
}
.lpl-sidebar-toggle:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Breadcrumb */
.lpl-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--dim);
  margin-bottom: 2rem;
  flex-wrap: wrap;
  font-family: var(--mono);
}
.lpl-breadcrumb a { color: var(--muted); text-decoration: none; transition: color 0.15s; }
.lpl-breadcrumb a:hover { color: var(--accent); }
.lpl-breadcrumb span:last-child { color: var(--accent-dark); font-weight: 600; }

/* Article */
.lpl-article { max-width: 740px; }

.lpl-article-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 2rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

/* Content body */
.lpl-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--body);
}

.lpl-content h2 {
  font-size: 1.35rem;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 2.5rem 0 0.875rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.lpl-content h2:first-child { margin-top: 0; }
.lpl-content h3 {
  font-size: 1.1rem;
  color: #1f2937;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.01em;
}
.lpl-content p { margin-bottom: 1.25rem; color: var(--body); }
.lpl-content strong { color: var(--ink); font-weight: 700; }
.lpl-content em { color: var(--muted); font-style: italic; }

.lpl-content ul, .lpl-content ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
.lpl-content ul li { list-style: disc; color: var(--body); margin-bottom: 0.4rem; }
.lpl-content ol li { list-style: decimal; color: var(--body); margin-bottom: 0.4rem; }

.lpl-content pre {
  background: #0f172a;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.875rem;
  color: #e2e8f0;
  margin: 1.5rem 0;
  line-height: 1.65;
}
.lpl-content code {
  background: var(--accent-light);
  border: 1px solid var(--accent-mid);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-family: var(--mono);
  font-size: 0.875em;
  color: var(--accent-dark);
}
.lpl-content pre code { background: none; border: none; padding: 0; color: inherit; }

.lpl-content blockquote {
  border-left: 3px solid var(--accent-mid);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  color: var(--muted);
  font-style: italic;
  background: var(--accent-light);
  border-radius: 0 6px 6px 0;
}

.lpl-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}
.lpl-content th {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-align: left;
  padding: 0.7rem 1rem;
  font-size: 0.82rem;
}
.lpl-content td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border-2);
  color: var(--body);
}
.lpl-content tr:last-child td { border-bottom: none; }
.lpl-content tr:nth-child(even) td { background: #fafafa; }

/* ─── Prev/Next pager ─── */
.lpl-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  max-width: 740px;
}
.lpl-pager-btn {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  text-decoration: none;
  transition: all 0.18s;
  color: inherit;
}
.lpl-pager-btn:hover {
  border-color: var(--accent-mid);
  background: var(--accent-light);
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-1px);
}
.lpl-pager-btn span { font-size: 0.7rem; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; }
.lpl-pager-btn strong { font-size: 0.9rem; color: var(--ink); font-weight: 600; line-height: 1.35; }
.lpl-pager-btn--next { text-align: right; }

/* ─── Course archive grid ─── */
.lpl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}
.lpl-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.lpl-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s;
}
.lpl-card:hover {
  border-color: var(--accent-mid);
  box-shadow: 0 8px 24px var(--accent-glow);
  transform: translateY(-2px);
}
.lpl-card:hover::before { transform: scaleX(1); }

.lpl-card-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}
.lpl-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--border-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.6rem;
}
.lpl-badge--free {
  color: var(--accent-dark);
  background: var(--accent-light);
  border-color: var(--accent-mid);
}

.lpl-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.lpl-card-title a { color: var(--ink); text-decoration: none; transition: color 0.15s; }
.lpl-card-title a:hover { color: var(--accent-dark); }

.lpl-card-excerpt {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lpl-btn {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border-radius: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s;
  box-shadow: 0 1px 6px var(--accent-glow);
}
.lpl-btn:hover {
  background: var(--accent-dark);
  color: #fff;
  box-shadow: 0 4px 14px rgba(13,148,136,0.3);
  transform: translateY(-1px);
}

/* ─── Single course fallback ─── */
.lpl-course-desc {
  font-size: 1.05rem;
  color: var(--body);
  margin-bottom: 2.5rem;
  max-width: 660px;
}

.lpl-outline-wrap { max-width: 740px; }
.lpl-outline-cta { margin-top: 2rem; }

.lpl-outline-section-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 1rem;
  overflow: hidden;
}
.lpl-outline-section-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: #f9fafb;
  border-bottom: 1px solid var(--border);
}
.lpl-outline-section-block__name {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink);
}
.lpl-outline-section-block__count {
  font-size: 0.78rem;
  color: var(--muted);
  font-family: var(--mono);
}
.lpl-outline-section-block__list { list-style: none; margin: 0; padding: 0; }
.lpl-outline-section-block__item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border-2);
  transition: background 0.15s;
}
.lpl-outline-section-block__item:last-child { border-bottom: none; }
.lpl-outline-section-block__item:hover { background: var(--accent-light); }
.lpl-outline-section-block__num {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--border-2);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--muted);
  flex-shrink: 0;
  font-family: var(--mono);
}
.lpl-outline-section-block__item a {
  color: var(--body);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}
.lpl-outline-section-block__item:hover a { color: var(--accent-dark); }

/* ─── Practice cards (interactive content) ─── */
.lpl-practice-filter {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.lpl-filter-btn {
  padding: 0.3rem 1rem;
  border-radius: 50px;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.lpl-filter-btn:hover,
.lpl-filter-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.lpl-practice-set {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.875rem;
  margin-bottom: 0.5rem;
}
@media (max-width: 700px) { .lpl-practice-set { grid-template-columns: 1fr; } }

.lpl-practice-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.lpl-practice-card:hover {
  border-color: var(--accent-mid);
  box-shadow: 0 4px 14px var(--accent-glow);
}
.lpl-practice-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.lpl-difficulty {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 50px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.lpl-difficulty--easy   { background: #d1fae5; color: #065f46; }
.lpl-difficulty--medium { background: #fef3c7; color: #92400e; }
.lpl-difficulty--hard   { background: #fee2e2; color: #991b1b; }

.lpl-practice-card__words { font-size: 0.72rem; color: var(--muted); font-weight: 600; }
.lpl-practice-card__topic { font-size: 0.78rem; color: var(--muted); margin-bottom: 0.75rem; }

.lpl-practice-card__sentence {
  background: var(--accent-light);
  border-left: 3px solid var(--accent-mid);
  border-radius: 0 6px 6px 0;
  padding: 0.65rem 1rem;
  font-size: 0.95rem;
  color: var(--ink);
  font-style: italic;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}
.lpl-practice-card__sentence[hidden] { display: none; }

.lpl-reveal-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.9rem;
  border-radius: 5px;
  border: 1.5px solid var(--accent-mid);
  background: #fff;
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.lpl-reveal-btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.lpl-practice-card[data-difficulty].lpl-hidden { display: none; }

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .lpl-layout { flex-direction: column; }

  .lpl-sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    width: 272px;
    z-index: 90;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    height: calc(100vh - 60px);
    box-shadow: 4px 0 24px rgba(0,0,0,0.1);
  }
  .lpl-sidebar.open { transform: translateX(0); }

  .lpl-main { padding: 2rem 1.5rem 4rem; }
  .lpl-sidebar-toggle { display: inline-flex; }
  .lpl-pager { grid-template-columns: 1fr; }
  .lpl-pager-btn--next { text-align: left; }
}

@media (max-width: 480px) {
  .lpl-main { padding: 1.5rem 1.25rem 4rem; }
  .lpl-grid { grid-template-columns: 1fr; }
}