.lesson-workspace {
  width: min(100%, 100rem);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  align-items: start;
  position: relative;
  transition: grid-template-columns 0.25s cubic-bezier(0.2, 0, 0, 1);
}
.lesson-workspace.is-sidebar-collapsed {
  grid-template-columns: 0px minmax(0, 1fr);
}
.sidebar-expand-btn {
  display: none;
  position: sticky;
  top: 92px;
  left: 0.75rem;
  z-index: 35;
  margin-left: 0.75rem;
  margin-top: 0.75rem;
  margin-bottom: -50px;
  align-self: start;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  background: var(--color-surface, #ffffff);
  color: var(--color-brand, #1C2228);
  font-size: 0.82rem;
  font-weight: 800;
  font-family: var(--font-ui);
  border: 1.5px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.lesson-workspace.is-sidebar-collapsed .sidebar-expand-btn {
  display: inline-flex;
}
.sidebar-expand-btn:hover {
  background: var(--color-brand);
  color: #ffffff;
  border-color: var(--color-brand);
  transform: translateX(2px);
}
.presentation-toolbar { position: fixed; z-index: 40; right: 1rem; bottom: 1rem; display: flex; gap: .35rem; padding: .4rem; border: 1px solid var(--color-line); border-radius: var(--radius-md); background: rgb(255 255 255 / .94); box-shadow: var(--shadow-md); backdrop-filter: blur(10px); }
.presentation-toolbar button { min-width: 42px; min-height: 42px; padding: .5rem .65rem; border: 1px solid var(--color-line); border-radius: var(--radius-sm); background: white; color: var(--color-brand); font-weight: 900; cursor: pointer; }
.presentation-toolbar button:hover, .presentation-toolbar button[aria-pressed="true"] { background: var(--color-brand); color: white; border-color: var(--color-brand); }
.lesson-sidebar {
  position: sticky;
  top: 79px;
  height: calc(100svh - 79px);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.4rem 1rem 3rem;
  background: var(--color-canvas);
  border-right: 1px solid var(--color-line);
  width: 290px;
  box-sizing: border-box;
  transition: opacity 0.22s ease, transform 0.25s cubic-bezier(0.2, 0, 0, 1), visibility 0.25s;
}
.lesson-workspace.is-sidebar-collapsed .lesson-sidebar {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-15px);
  padding: 0;
  border-right-color: transparent;
  width: 0;
  overflow: hidden;
}
.lesson-workspace.is-sidebar-collapsed .lesson-book-page,
.lesson-workspace.is-sidebar-collapsed .family-summary-page {
  max-width: 88rem;
  width: 100%;
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-inline: 0.2rem;
  gap: 0.5rem;
}
.sidebar-header .timeline-label {
  margin: 0;
}
.sidebar-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 750;
  font-family: var(--font-ui);
  color: var(--color-muted);
  background: var(--color-paper-warm);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.sidebar-toggle-btn:hover {
  background: var(--color-brand);
  color: white;
  border-color: var(--color-brand);
}
.timeline-label { margin: 0 0 1rem; padding-inline: .4rem; color: var(--color-muted); font-size: .68rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.tense-timeline { position: relative; margin: 0; padding: 0 0 0 1.35rem; list-style: none; }
.tense-timeline::before { content: ""; position: absolute; left: .36rem; top: .8rem; bottom: .8rem; width: 1px; background: var(--color-line); }
.timeline-era { position: relative; margin: 1.2rem 0 .45rem; color: var(--color-accent); font: italic .78rem var(--font-reading); }
.timeline-era::before { content: ""; position: absolute; left: -1.14rem; top: .35rem; width: 9px; aspect-ratio: 1; border: 2px solid var(--color-canvas); border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 0 1px var(--color-accent); }
.tense-timeline a { display: block; margin-bottom: .18rem; padding: .62rem .7rem; border-radius: var(--radius-sm); color: var(--color-muted); font-size: .82rem; font-weight: 650; line-height: 1.25; text-decoration: none; transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast); }
.tense-timeline a:hover { background: var(--color-brand-light); color: var(--color-brand); transform: translateX(3px); }
.tense-timeline a[aria-current="page"] { background: var(--color-brand); color: white; }
.tense-timeline .summary-link a { margin-bottom: .35rem; padding-block: .45rem; border: 1px dashed var(--color-accent-border); color: var(--color-accent); font-size: .76rem; }
.tense-timeline .strategy-era { margin-top: .25rem; color: var(--color-brand); font-weight: 800; }
.tense-timeline .strategy-era::before { background: var(--color-gold); box-shadow: 0 0 0 1px var(--color-gold); }
.tense-timeline .strategy-link a { margin-bottom: 1.4rem; border: 1px solid var(--color-line); background: var(--color-paper-warm); color: var(--color-brand-deep); font-weight: 850; }
.lesson-picker { display: none; }
.lesson-book-page { min-width: 0; max-width: 78rem; min-height: calc(100svh - 79px); padding: clamp(2rem, 4vw, 4rem); background: var(--color-surface); border: 1px solid var(--color-line); box-shadow: var(--shadow-sm); border-radius: var(--radius-sm); font-size: calc(1rem * var(--lesson-font-scale, 1)); animation: page-in .35s both; }
.lesson-strip-title { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: var(--space-3); margin-bottom: 1.5rem; background: var(--color-brand); border-left: 4px solid var(--color-accent); color: var(--color-surface); min-height: 3.5rem; padding: var(--space-3) var(--space-4); border-radius: var(--radius-xs); }
.lesson-strip-title .eyebrow, .lesson-strip-title .view-kicker { grid-column: 1; margin: 0 0 var(--space-1) 0; color: var(--color-accent-border); letter-spacing: 0.1em; font-size: var(--fs-xs); text-transform: uppercase; font-weight: 700; }
.lesson-strip-title h1, .lesson-strip-title #view-title { grid-column: 1; margin: 0; color: var(--color-surface); font-family: var(--font-reading); font-size: clamp(1.4rem, 3.5vw, 2rem); line-height: 1.15; letter-spacing: -0.01em; }
.lesson-number { align-self: stretch; display: inline-flex; align-items: center; justify-content: center; min-width: 2.75rem; margin: calc(var(--space-3) * -1) calc(var(--space-4) * -1) calc(var(--space-3) * -1) var(--space-2); background: var(--color-accent); color: #FFFFFF; font: 900 1.8rem/1 var(--font-ui); border-radius: 0 var(--radius-xs) var(--radius-xs) 0; }
.lesson-intro { max-width: 78ch; margin-bottom: 1.5rem; font-family: var(--font-reading); font-size: 1.05rem; }
.formula-table-wrap, .family-table-wrap, .agreement-table-wrap {
  width: 100%;
  margin: 1.5rem 0 2rem;
  overflow-x: auto;
  border: 1.5px solid var(--color-table-border-strong, #6B5E4F);
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px rgba(107, 94, 79, 0.08);
  background-color: var(--color-surface);
}
.formula-table, .family-table, .agreement-table { width: 100%; min-width: 760px; margin: 0; border-collapse: collapse; background: white; font-size: .9rem; border: 1.5px solid var(--color-table-border-strong, #6B5E4F); }
.formula-table caption, .family-table caption, .agreement-table caption { padding: 0; background: var(--color-paper-warm, #EFE8DE); color: var(--color-ink); font-weight: 800; border-bottom: 2px solid var(--color-table-border-strong, #6B5E4F); }
.formula-table th, .formula-table td, .family-table th, .family-table td, .agreement-table th, .agreement-table td { padding: .8rem 1rem; border: 1.5px solid var(--color-table-border, #9C8E7E); text-align: left; }
.formula-table tbody th, .family-table tbody th, .agreement-table tbody th { width: 13%; background: var(--color-paper, #F3EEE7); color: var(--color-brand); border-right: 2px solid var(--color-table-border-strong, #6B5E4F); }
.formula-table thead th, .family-table thead th, .agreement-table thead th { background: var(--color-brand, #1C2228); color: white; border-bottom: 2px solid var(--color-table-border-strong, #6B5E4F); }
.formula-code { width: 27%; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-weight: 700; }
.formula-examples { margin: 0; padding-left: 1.2rem; font-family: var(--font-reading); }
.formula-examples li + li { margin-top: .4rem; }
.lesson-section { margin-top: 2.2rem; }
.section-bar { margin-bottom: 1rem; padding: .55rem .8rem; background: var(--color-brand); border-left: 4px solid var(--color-accent); color: white; font-size: .84rem; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.use-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--color-line); }
.use-list li { min-width: 0; padding: 1.15rem 1rem 1.15rem 0; border-bottom: 1px solid var(--color-line); }
.use-list li:nth-child(even) { padding-left: 1rem; border-left: 1px solid var(--color-line); }
.use-list strong { display: block; margin-bottom: .25rem; color: var(--color-brand); }
.use-list p { margin-bottom: .45rem; color: var(--color-deep-red); font-size: .96rem; font-weight: 700; }
.use-list em { font-family: var(--font-reading); }
.usage-examples { margin: .75rem 0 0; padding-left: 1.25rem; color: var(--color-ink); font-family: var(--font-reading); font-size: .9rem; }
.usage-examples li { padding: 0; border: 0; }
.use-list .usage-examples li:nth-child(even) { padding-left: 0; border-left: 0; }
.usage-examples li + li { margin-top: .45rem; }
.expression-list { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0; padding: 0; list-style: none; }
.expression-list li { min-width: 116px; padding: .55rem .7rem; border: 1px solid var(--color-line); background: white; color: var(--color-brand); text-align: center; border-radius: var(--radius-xs); }
.expression-en, .expression-tr { display: block; }
.expression-en { font-size: .84rem; font-weight: 850; }
.expression-tr { margin-top: .18rem; color: var(--color-muted); font-size: .7rem; font-weight: 650; }
.example-list { margin: 0; padding-left: 1.5rem; font-family: var(--font-reading); font-size: 1.03rem; }
.example-list li + li { margin-top: .65rem; }
.contrast-note { margin: 2rem 0 0; padding: 1.1rem 1.2rem; border-left: 4px solid var(--color-accent); background: var(--color-accent-light); }
.contrast-note strong { color: var(--color-accent); }
.lesson-actions { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--color-line); }
.source-note { margin: 0; color: var(--color-muted); font-size: .76rem; }
.family-summary-page { min-width: 0; max-width: 78rem; min-height: calc(100svh - 79px); padding: clamp(2rem, 4vw, 4rem); background: var(--color-surface); border: 1px solid var(--color-line); box-shadow: var(--shadow-sm); border-radius: var(--radius-sm); animation: page-in .35s both; }
.summary-decision, .summary-examples { margin-top: 2rem; padding: 1.3rem; background: white; border-left: 5px solid var(--color-accent); border: 1px solid var(--color-line); border-left-width: 5px; }
.summary-decision h2, .summary-examples h2 { margin-top: 0; color: var(--color-brand); }
.summary-decision li + li, .summary-examples li + li { margin-top: .55rem; }
.agreement-principles { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1px; margin: 0; padding: 1px; background: var(--color-line); list-style: none; }
.agreement-principles > li { display: grid; grid-template-columns: 2.5rem 1fr; gap: .8rem; padding: 1rem; background: white; }
.agreement-principles > li > span { color: var(--color-accent); font-size: 1.2rem; font-weight: 900; }
.agreement-principles h3 { margin: 0 0 .3rem; color: var(--color-brand); font-size: 1rem; }
.agreement-principles p { margin: 0 0 .6rem; color: var(--color-muted); font-size: .9rem; }
.agreement-principles code { color: var(--color-deep-red); white-space: normal; }
.agreement-table code { white-space: normal; }
.pattern-warning { margin: .8rem 0 0; padding: .8rem 1rem; background: var(--color-paper-warm); font-size: .88rem; border-left: 4px solid var(--color-accent); }
.trap-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .8rem; }
.trap-grid article,.agreement-question { padding: 1rem; border: 1px solid var(--color-line); background: white; border-radius: var(--radius-xs); }
.trap-grid article > span { display: inline-block; padding: .2rem .5rem; background: var(--color-accent); color: white; font-weight: 900; border-radius: var(--radius-xs); }
.trap-grid p { margin: .7rem 0 .25rem; color: var(--color-muted); }
.trap-grid strong,.trap-grid small { display: block; }
.trap-grid small { margin-top: .4rem; color: var(--color-muted); line-height: 1.45; }
.agreement-questions { display: grid; gap: 1rem; }
.agreement-question header { display: flex; align-items: center; gap: .6rem; color: var(--color-brand); }
.agreement-question header span { padding: .25rem .45rem; background: var(--color-brand); color: white; font-size: .72rem; font-weight: 900; border-radius: var(--radius-xs); }
.agreement-stem { font: 1.02rem/1.6 var(--font-reading); }
.agreement-question ol { columns: 2; padding-left: 1.6rem; }
.agreement-question li { break-inside: avoid; margin-bottom: .4rem; }
.agreement-question details { margin-top: .8rem; border-top: 1px solid var(--color-line); }
.agreement-question summary { padding-top: .8rem; color: var(--color-accent); font-weight: 850; cursor: pointer; }
.solution-panel { margin-top: .75rem; padding: 1rem; background: var(--color-paper-warm); border-radius: var(--radius-xs); }
.solution-panel ul { margin-bottom: 0; padding-left: 1.2rem; }
.agreement-checklist ol { display: grid; gap: .55rem; margin: 0; padding: 0; list-style-position: inside; }
.agreement-checklist li { padding: .75rem 1rem; border-left: 4px solid var(--color-accent); background: white; border: 1px solid var(--color-line); border-left-width: 4px; }
body.presentation-mode .lesson-sidebar, body.presentation-mode .lesson-picker, body.presentation-mode .sidebar-expand-btn { display: none !important; }
body.presentation-mode .lesson-workspace { display: block; width: 100%; max-width: none; }
body.presentation-mode .lesson-book-page,
body.presentation-mode .family-summary-page { max-width: none; min-height: 100svh; margin: 0; padding: clamp(1.5rem, 4vw, 4rem); box-shadow: none; border: 0; }
body.presentation-mode .presentation-toolbar { top: 1rem; bottom: auto; }
@keyframes page-in { from { opacity: 0; transform: translateY(12px); } }
@media (max-width: 1100px) {
  .lesson-workspace { display: block; }
  .lesson-sidebar, .sidebar-expand-btn, .sidebar-toggle-btn { display: none !important; }
  .lesson-picker { position: sticky; z-index: 10; top: 79px; display: flex; align-items: center; gap: .7rem; padding: .7rem 1rem; background: var(--color-canvas); border-bottom: 1px solid var(--color-line); }
  .lesson-picker label { font-size: .75rem; font-weight: 800; text-transform: uppercase; }
  .lesson-picker select { min-width: 0; flex: 1; padding: .55rem; border: 1px solid var(--color-line); background: white; }
  .lesson-book-page, .family-summary-page { max-width: none; }
}
@media (max-width: 760px) {
  .lesson-picker { top: 0; }
  .lesson-book-page, .family-summary-page { padding: 1rem; }
  .lesson-strip-title { margin-inline: -1rem; padding: 1.2rem 1rem; }
  .use-list { grid-template-columns: 1fr; }
  .agreement-principles,.trap-grid { grid-template-columns: 1fr; }
  .agreement-question ol { columns: 1; }
  .use-list li:nth-child(even) { padding-left: 0; border-left: 0; }
  .formula-table-wrap, .family-table-wrap { margin-inline: 0; }
  .formula-table { min-width: 0; }
  .formula-table caption { display: block; width: 100%; box-sizing: border-box; }
  .formula-table thead { display: none; }
  .formula-table, .formula-table tbody { display: block; }
  .formula-table tbody tr { display: grid; grid-template-columns: 88px minmax(0, 1fr); margin-bottom: .8rem; border: 1px solid var(--color-line); }
  .formula-table tbody th, .formula-table tbody td { width: auto; padding: .7rem; border: 0; }
  .formula-table tbody th { grid-row: 1; }
  .formula-table .formula-code { grid-row: 1; }
  .formula-table tbody td:last-child { grid-column: 1 / -1; border-top: 1px solid var(--color-line); }
  .lesson-actions { align-items: flex-start; flex-direction: column; }
}

/* TABLE CAPTION BAR & FULLSCREEN FOCUS OVERLAY (Akıllı Tahta Odak Modu) */
.table-caption-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
}

.table-caption-title {
  flex: 1;
  text-align: left;
}

.table-focus-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface, #ffffff);
  color: var(--color-brand, #1C2228);
  border: 1.5px solid var(--color-table-border-strong, #6B5E4F);
  border-radius: var(--radius-xs, 6px);
  padding: 5px 12px;
  font-size: 12.5px;
  font-weight: 700;
  font-family: var(--font-ui, sans-serif);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  transition: all 0.15s ease;
  user-select: none;
}

.table-focus-btn:hover {
  background: var(--color-accent, #B84A39);
  color: #ffffff;
  border-color: var(--color-accent, #B84A39);
  transform: translateY(-1px);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.12);
}

.table-focus-btn svg {
  flex-shrink: 0;
}

body.table-focus-open {
  overflow: hidden;
}

.table-focus-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100000;
  align-items: center;
  justify-content: center;
  padding: 18px;
  box-sizing: border-box;
}

.table-focus-modal.is-active {
  display: flex;
}

.table-focus-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(16, 20, 23, 0.92);
  backdrop-filter: blur(8px);
}

.table-focus-shell {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1140px;
  max-height: 94vh;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 2px solid var(--color-brand, #1C2228);
  transition: max-width 0.25s ease;
}

.table-focus-shell.is-full-width {
  max-width: 98vw;
}

.table-focus-header {
  background: var(--color-brand, #1C2228);
  color: #ffffff;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 4px solid var(--color-accent, #B84A39);
  gap: 16px;
  flex-wrap: wrap;
}

.table-focus-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.table-focus-badge {
  background: var(--color-accent, #B84A39);
  color: #ffffff;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table-focus-title {
  font-family: var(--font-heading, 'Merriweather', serif);
  font-size: 1.15rem;
  font-weight: 800;
  margin: 0;
  color: #ffffff;
}

.table-focus-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.focus-btn-group {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  padding: 2px;
}

.focus-tool-btn {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 5px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-ui, sans-serif);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
  user-select: none;
}

.focus-btn-group .focus-tool-btn {
  background: transparent;
  border: none;
  border-radius: 4px;
  padding: 5px 9px;
}

.focus-tool-btn:hover {
  background: var(--color-accent, #B84A39);
  border-color: var(--color-accent, #B84A39);
}

.focus-scale-indicator {
  font-size: 12.5px;
  font-weight: 700;
  color: #e2e8f0;
  padding: 0 8px;
  min-width: 48px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.focus-close-btn {
  background: #dc2626 !important;
  border-color: #b91c1c !important;
  color: #ffffff !important;
}

.focus-close-btn:hover {
  background: #991b1b !important;
}

.table-focus-body {
  flex: 1;
  overflow: auto;
  padding: 24px;
  background: var(--color-canvas, #FAF7F2);
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.table-focus-content {
  width: 100%;
}

.table-focus-body table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
  border: 1.5px solid var(--color-table-border-strong, #6B5E4F);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.table-focus-body caption {
  display: none;
}

.table-focus-body th,
.table-focus-body td {
  padding: calc(12px * var(--table-focus-scale, 1.35)) calc(16px * var(--table-focus-scale, 1.35));
  font-size: calc(14.5px * var(--table-focus-scale, 1.35));
  line-height: 1.45;
  border: 1px solid #d5cec5;
}

.table-focus-body thead th {
  background-color: var(--color-paper-warm, #EFE8DE);
  color: var(--color-brand, #1C2228);
  font-weight: 800;
  border-bottom: 2px solid var(--color-table-border-strong, #6B5E4F);
}

.table-focus-body tbody th {
  background-color: var(--color-paper, #F3EEE7);
  color: var(--color-brand, #1C2228);
  font-weight: 700;
  width: auto;
}

.table-focus-body tbody td {
  color: #334155;
}

.table-focus-body tbody tr:hover td {
  background-color: #fef7ec;
}

.table-focus-footer {
  background: #f1f5f9;
  padding: 8px 20px;
  font-size: 12px;
  color: #64748b;
  border-top: 1px solid #e2e8f0;
  display: flex;
  justify-content: space-between;
}



/* Teacher Note Editor Styles */

.pdf-rule-item {
  padding-left: var(--space-1);
  font-family: var(--font-ui);
  line-height: 1.55;
}

.pdf-rule-item > strong {
  color: var(--color-brand);
}

.pdf-rule-item { cursor: pointer; }
.pdf-rule-item:focus-within { outline: 2px solid var(--color-accent); outline-offset: 4px; border-radius: var(--radius-xs); }
.lesson-note-card,
.lesson-note-editor {
  margin-top: var(--space-3); padding: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--color-accent) 35%, var(--color-line));
  border-radius: var(--radius-md); background: linear-gradient(135deg, var(--color-accent-light), var(--color-surface));
  box-shadow: 0 8px 22px rgba(28, 34, 40, 0.08);
}
.lesson-note-card > strong, .lesson-note-editor-head label { color: var(--color-brand); font: 850 var(--fs-xs)/1 var(--font-ui); letter-spacing: .075em; text-transform: uppercase; }
.lesson-note-body { margin: var(--space-3) 0 0; color: var(--color-ink); font: 500 var(--fs-sm)/1.65 var(--font-ui); }
.lesson-note-body > :first-child { margin-top: 0; }.lesson-note-body > :last-child { margin-bottom: 0; }.lesson-note-body ul,.lesson-note-body ol { padding-left: 1.35rem; }
.lesson-note-editor-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-3); }
.lesson-note-editor-head span { color: var(--color-muted); font: 650 var(--fs-xs)/1.2 var(--font-ui); }
.lesson-note-toolbar { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: var(--space-2); padding: .35rem; border: 1px solid var(--color-line); border-radius: var(--radius-sm); background: rgb(255 255 255 / .72); }
.lesson-note-toolbar button { display: grid; place-items: center; width: 2.25rem; min-height: 2rem; border: 0; border-radius: var(--radius-xs); background: transparent; color: var(--color-brand); font: 800 1rem/1 var(--font-ui); cursor: pointer; }
.lesson-note-toolbar button:hover,.lesson-note-toolbar button:focus-visible { background: var(--color-brand); color: var(--color-surface); outline: none; }
.lesson-note-input { min-height: 7.5rem; padding: var(--space-3); overflow-wrap: anywhere; border: 1px solid var(--color-line); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-ink); font: 500 var(--fs-sm)/1.65 var(--font-ui); outline: none; }
.lesson-note-input:empty::before { content: attr(data-placeholder); color: var(--color-muted); pointer-events: none; }.lesson-note-input:focus { border-color: var(--color-accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 18%, transparent); }
.lesson-note-actions { display: flex; gap: var(--space-2); margin-top: var(--space-2); }
.lesson-note-actions button { min-height: 2.35rem; border: 1px solid var(--color-brand); border-radius: 999px; padding: 0 var(--space-4); background: var(--color-surface); color: var(--color-brand); font: 800 var(--fs-xs)/1 var(--font-ui); cursor: pointer; }
.lesson-note-actions button[data-lesson-note-save] { background: var(--color-brand); color: var(--color-surface); }
.lesson-note-actions button[data-lesson-note-delete] { border-color: #9f352a; color: #9f352a; }

.lesson-key-points {
  margin-block: var(--space-6);
  padding: var(--space-5);
  border: 2px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.lesson-key-points h2 {
  background: var(--color-brand);
  color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  text-shadow: none;
}

.pronoun-highlight {
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-weight: 800;
  padding: 0.05rem 0.3rem;
  border-radius: var(--radius-xs);
}

.practice-panel {
  margin-top: var(--space-6);
  background: var(--color-paper-warm);
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;