/*
 * Página-modelo do novo padrão de aulas.
 * Escopo deliberadamente limitado a .lesson-clean-model para não alterar
 * a página inicial, as páginas de conteúdos nem as demais aulas.
 */

.lesson-clean-model {
  --lesson-blue: #075ee6;
  --lesson-blue-dark: #073b91;
  --lesson-blue-soft: #eef5ff;
  --lesson-ink: #101a33;
  --lesson-text: #34415d;
  --lesson-muted: #68748b;
  --lesson-line: #dfe7f2;
  --lesson-soft: #f7faff;
  --lesson-green: #16845f;
  --lesson-green-soft: #eefbf5;
  --lesson-amber: #a86100;
  --lesson-amber-soft: #fff8e8;
  color: var(--lesson-ink);
  background: #f8fbff !important;
  background-image: none !important;
  overflow-x: hidden;
}

.lesson-clean-model,
.lesson-clean-model * {
  box-sizing: border-box;
}

.lesson-clean-model .lesson-skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  background: var(--lesson-blue);
  border-radius: 8px;
  transform: translateY(-150%);
}

.lesson-clean-model .lesson-skip-link:focus {
  transform: translateY(0);
}

/* Cabeçalho simples */
.lesson-clean-model .lesson-model-header {
  min-height: 70px;
  padding: 0 clamp(20px, 4vw, 64px);
  background: rgba(255, 255, 255, .98) !important;
  border-bottom: 1px solid var(--lesson-line);
  box-shadow: 0 4px 18px rgba(36, 72, 126, .045);
  backdrop-filter: blur(14px);
}

.lesson-clean-model .lesson-model-header .brand {
  gap: 11px;
  color: var(--lesson-ink);
  font-size: 1.05rem;
  letter-spacing: -.025em;
  text-decoration: none;
}

.lesson-clean-model .lesson-model-header .brand-mark {
  display: grid;
  width: 24px;
  height: 24px;
  padding: 0;
  place-items: center;
  color: #fff;
  font-size: .88rem;
  background: var(--lesson-blue);
  border-radius: 4px;
  box-shadow: none;
  transform: rotate(45deg);
}

.lesson-clean-model .lesson-model-header .brand-symbol {
  display: block;
  color: #fff !important;
  line-height: 1;
  transform: rotate(-45deg);
}

.lesson-clean-model .lesson-model-header .brand-name,
.lesson-clean-model .lesson-model-header .brand-name span {
  color: var(--lesson-ink);
}

.lesson-clean-model .lesson-model-header .brand-name span {
  color: var(--lesson-blue);
}

.lesson-clean-model .lesson-model-header .main-nav {
  gap: clamp(8px, 2vw, 26px);
  font-size: .88rem;
}

.lesson-clean-model .lesson-model-header .main-nav a {
  position: relative;
  min-height: 70px;
  display: inline-flex;
  align-items: center;
  padding: 0 4px;
  color: #26334e;
  font-weight: 700;
  text-decoration: none;
}

.lesson-clean-model .lesson-model-header .main-nav a::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: -1px;
  left: 4px;
  height: 2px;
  background: var(--lesson-blue);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .18s ease;
}

.lesson-clean-model .lesson-model-header .main-nav a:hover,
.lesson-clean-model .lesson-model-header .main-nav a:focus-visible,
.lesson-clean-model .lesson-model-header .main-nav a[aria-current="page"] {
  color: var(--lesson-blue);
}

.lesson-clean-model .lesson-model-header .main-nav a:hover::after,
.lesson-clean-model .lesson-model-header .main-nav a:focus-visible::after,
.lesson-clean-model .lesson-model-header .main-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.lesson-clean-model .study-pet,
.lesson-clean-model [data-study-pet] {
  display: none !important;
}

.lesson-clean-model .lesson-model-header .nav-toggle {
  width: 42px;
  height: 42px;
  padding: 9px;
  border-color: var(--lesson-line);
  border-radius: 8px;
  background: #fff;
}

/* Moldura e introdução */
.lesson-clean-model .lesson-studio {
  width: min(1480px, calc(100% - 40px));
  max-width: none;
  padding: 0 0 64px;
}

.lesson-clean-model .studio-intro {
  position: relative;
  display: block;
  min-height: 214px;
  padding: 42px 0 30px 286px;
  border-bottom: 1px solid var(--lesson-line);
}

.lesson-clean-model .studio-intro > div:first-child {
  max-width: 890px;
}

.lesson-clean-model .studio-intro .breadcrumb {
  position: absolute;
  top: 26px;
  left: 0;
  width: 250px;
  margin: 0;
  color: var(--lesson-muted);
  font-size: .76rem;
}

.lesson-clean-model .studio-intro .breadcrumb a {
  color: var(--lesson-blue);
  text-decoration: none;
}

.lesson-clean-model .studio-intro h1 {
  margin: 22px 0 0;
  color: var(--lesson-ink);
  font-family: Inter, system-ui, sans-serif;
  font-size: clamp(2.35rem, 4vw, 3.7rem);
  line-height: 1.02;
  letter-spacing: -.055em;
  font-weight: 850;
}

.lesson-clean-model .studio-intro h1::before {
  content: "Fundamentos";
  display: table;
  margin-bottom: 12px;
  padding: 4px 8px;
  color: var(--lesson-blue);
  font-size: .68rem;
  line-height: 1;
  letter-spacing: .04em;
  text-transform: uppercase;
  background: var(--lesson-blue-soft);
  border-radius: 5px;
}

.lesson-clean-model .studio-kicker {
  margin: 12px 0 0 !important;
  color: var(--lesson-muted) !important;
  font-size: 1rem !important;
  line-height: 1.5 !important;
  font-weight: 650;
}

.lesson-clean-model .studio-intro p:not(.studio-kicker) {
  max-width: 780px;
  margin: 12px 0 0;
  color: var(--lesson-text);
  font-size: .98rem;
  line-height: 1.72;
}

.lesson-clean-model .studio-decoration {
  display: none;
}

/* Duas colunas somente: tópicos reais + conteúdo */
.lesson-clean-model .lesson-page-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.lesson-clean-model .lesson-anchor-nav {
  position: sticky;
  top: 88px;
  z-index: 3;
  grid-column: 1;
  grid-row: 1;
  width: 250px;
  max-height: calc(100vh - 108px);
  margin-top: -146px;
  padding-right: 12px;
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: #bdcce1 transparent;
}

.lesson-clean-model .lesson-anchor-card {
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.lesson-clean-model .lesson-anchor-title {
  margin: 0 0 10px;
  padding: 0 10px;
  color: var(--lesson-ink);
  font-size: .86rem;
  letter-spacing: 0;
}

.lesson-clean-model .lesson-anchor-list {
  gap: 1px;
}

.lesson-clean-model .lesson-anchor-link {
  position: relative;
  padding: 8px 10px 8px 14px;
  color: #4b5871;
  font-size: .78rem;
  line-height: 1.32;
  font-weight: 620;
  border: 0;
  border-radius: 6px;
}

.lesson-clean-model .lesson-anchor-link::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 0;
  width: 2px;
  background: transparent;
}

.lesson-clean-model .lesson-anchor-link:hover,
.lesson-clean-model .lesson-anchor-link:focus-visible,
.lesson-clean-model .lesson-anchor-link.active,
.lesson-clean-model .lesson-anchor-link[aria-current="location"] {
  color: var(--lesson-blue);
  background: var(--lesson-blue-soft);
  border-color: transparent;
}

.lesson-clean-model .lesson-anchor-link.active::before,
.lesson-clean-model .lesson-anchor-link[aria-current="location"]::before {
  background: var(--lesson-blue);
}

.lesson-clean-model .lesson-page-layout .studio-main {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  display: block;
  counter-reset: lesson-section;
  background: #fff;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  overflow: visible;
}

.lesson-clean-model .lesson-mobile-anchor-toggle {
  display: none;
}

/* Conteúdo corrido, sem um card por conceito */
.lesson-clean-model .studio-main > .study-card {
  display: block;
  counter-increment: lesson-section;
  margin: 0;
  padding: 34px 4px 38px;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--lesson-line);
  border-radius: 0;
  box-shadow: none;
  transition: none;
}

.lesson-clean-model .studio-main > .study-card:first-child {
  padding-top: 30px;
}

.lesson-clean-model .studio-main > .study-card:last-of-type {
  border-bottom: 0;
}

.lesson-clean-model .studio-main > .study-card:hover {
  transform: none;
  border-color: var(--lesson-line);
  box-shadow: none;
}

.lesson-clean-model .study-icon {
  display: none;
}

.lesson-clean-model .study-card > div,
.lesson-clean-model .study-card-body {
  min-width: 0;
}

.lesson-clean-model .study-card h2 {
  margin: 0 0 14px;
  color: var(--lesson-blue);
  font-family: Inter, system-ui, sans-serif;
  font-size: clamp(1.28rem, 2vw, 1.62rem);
  line-height: 1.22;
  letter-spacing: -.032em;
  font-weight: 800;
}

.lesson-clean-model .study-card h2::before {
  content: counter(lesson-section) ". ";
  color: var(--lesson-blue);
}

.lesson-clean-model .study-card h3 {
  color: var(--lesson-ink);
  font-family: Inter, system-ui, sans-serif;
  line-height: 1.35;
}

.lesson-clean-model .study-card p,
.lesson-clean-model .study-card li {
  color: var(--lesson-text);
  font-size: .96rem;
  line-height: 1.78;
}

.lesson-clean-model .study-card p {
  margin: 10px 0 0;
}

.lesson-clean-model .study-card :is(ul, ol) {
  padding-left: 1.35rem;
}

.lesson-clean-model .study-card li + li {
  margin-top: 7px;
}

.lesson-clean-model .two-column-card {
  grid-template-columns: 1fr;
}

/* Exemplos no fluxo, sem aparência de card */
.lesson-clean-model .lesson-examples,
.lesson-clean-model .representation-example {
  margin: 22px 0 0;
  padding: 0 0 0 18px;
  background: transparent;
  border: 0;
  border-left: 2px solid #b9d4f8;
  border-radius: 0;
  box-shadow: none;
}

.lesson-clean-model .lesson-examples h3,
.lesson-clean-model .representation-example > p:first-child {
  color: var(--lesson-blue-dark);
  font-size: .88rem;
  font-weight: 800;
}

/* Grades explicativas sem transformar cada trecho em cartão */
.lesson-clean-model .mini-grid,
.lesson-clean-model .representation-grid {
  gap: 0 24px;
}

.lesson-clean-model .mini-note,
.lesson-clean-model .representation-grid > div {
  min-height: 0;
  padding: 18px 0;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--lesson-line);
  border-radius: 0;
  box-shadow: none;
}

.lesson-clean-model .mini-note:hover {
  background: transparent;
  border-color: var(--lesson-line);
  transform: none;
}

.lesson-clean-model .mini-note strong,
.lesson-clean-model .representation-grid > div strong {
  margin-bottom: 6px;
  color: var(--lesson-blue-dark) !important;
  font-family: Inter, system-ui, sans-serif;
  font-size: .98rem;
  line-height: 1.35;
  font-style: normal;
  font-weight: 800;
}

.lesson-clean-model .mini-note p {
  margin-top: 5px;
}

.lesson-clean-model .element-demo,
.lesson-clean-model .notation-translate,
.lesson-clean-model .element-rules {
  border-radius: 8px;
}

.lesson-clean-model .element-set-box,
.lesson-clean-model .element-outside-box,
.lesson-clean-model .notation-translate > div,
.lesson-clean-model .element-rules > p,
.lesson-clean-model .representation-note,
.lesson-clean-model .notation-note,
.lesson-clean-model .element-question {
  border-radius: 6px;
}

/* Fórmulas importantes */
.lesson-clean-model .math-block,
.lesson-clean-model .worked-panel.formula-panel,
.lesson-clean-model .single-formula-panel {
  max-width: 100%;
  margin: 20px 0 0;
  padding: 18px 20px;
  color: var(--lesson-ink);
  background: var(--lesson-blue-soft);
  border: 1px solid #c9ddfa;
  border-left: 4px solid var(--lesson-blue);
  border-radius: 7px;
  box-shadow: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.lesson-clean-model .worked-panel.formula-panel::before {
  content: "Fórmula importante";
  display: block;
  margin-bottom: 9px;
  color: var(--lesson-blue-dark);
  font-family: Inter, system-ui, sans-serif;
  font-size: .7rem;
  line-height: 1;
  letter-spacing: .05em;
  text-transform: uppercase;
  font-weight: 850;
}

.lesson-clean-model .math-text,
.lesson-clean-model .math-line,
.lesson-clean-model .formula-panel p {
  overflow-wrap: anywhere;
}

/* Deduções e exemplos resolvidos em etapas */
.lesson-clean-model .worked-panel:not(.formula-panel) {
  margin: 20px 0 0;
  padding: 2px 0 2px 20px;
  background: transparent;
  border: 0;
  border-left: 3px solid #92bdf4;
  border-radius: 0;
  box-shadow: none;
}

.lesson-clean-model .worked-panel ol {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: worked-step;
}

.lesson-clean-model .worked-panel ol li {
  position: relative;
  min-height: 32px;
  padding-left: 42px;
  counter-increment: worked-step;
}

.lesson-clean-model .worked-panel ol li::before {
  content: counter(worked-step);
  position: absolute;
  top: 1px;
  left: 0;
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  color: var(--lesson-blue);
  font-size: .76rem;
  font-weight: 850;
  background: var(--lesson-blue-soft);
  border: 1px solid #c9ddfa;
  border-radius: 50%;
}

/* Observações, alertas e pegadinhas */
.lesson-clean-model .lesson-note {
  margin: 20px 0 0 !important;
  padding: 16px 18px 16px 46px;
  color: #245844 !important;
  background: var(--lesson-green-soft);
  border: 1px solid #bfe8d7;
  border-left: 4px solid var(--lesson-green);
  border-radius: 7px;
}

.lesson-clean-model .lesson-note::before {
  content: "i";
  float: left;
  display: grid;
  width: 22px;
  height: 22px;
  margin: 1px 0 0 -32px;
  place-items: center;
  color: #fff;
  font-family: Georgia, serif;
  font-size: .8rem;
  font-weight: 800;
  background: var(--lesson-green);
  border-radius: 50%;
}

.lesson-clean-model #pegadinhas > div {
  padding: 22px 24px;
  background: var(--lesson-amber-soft);
  border: 1px solid #f1d79e;
  border-left: 4px solid #d28a16;
  border-radius: 7px;
}

.lesson-clean-model #pegadinhas h2 {
  color: var(--lesson-amber);
}

.lesson-clean-model #como-cai .method-list,
.lesson-clean-model #metodo .method-list {
  margin-top: 18px;
}

/* Tabelas e diagramas */
.lesson-clean-model .lesson-table {
  width: 100%;
  max-width: 100%;
  margin-top: 20px;
  border: 1px solid var(--lesson-line);
  border-radius: 7px;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
  box-shadow: none;
}

.lesson-clean-model .lesson-table th,
.lesson-clean-model .lesson-table td {
  padding: 13px 14px;
  color: var(--lesson-text);
  font-size: .88rem;
  line-height: 1.55;
  border-color: var(--lesson-line);
  overflow-wrap: anywhere;
}

.lesson-clean-model .lesson-table th {
  color: var(--lesson-ink);
  background: var(--lesson-soft);
}

.lesson-clean-model .set-diagram {
  width: min(100%, 800px);
  margin: 24px auto 0;
  border: 1px solid var(--lesson-line);
  border-radius: 8px;
}

.lesson-clean-model .venn-controls {
  gap: 8px;
}

.lesson-clean-model .venn-chip {
  min-height: 40px;
  border-radius: 6px;
}

.lesson-clean-model .venn-feedback,
.lesson-clean-model .venn-steps li {
  border-radius: 6px;
  box-shadow: none;
}

/* Exercícios separados, sem alterar enunciados ou respostas */
.lesson-clean-model .exercise-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.lesson-clean-model .exercise-item {
  min-width: 0;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--lesson-line);
  border-radius: 8px;
  box-shadow: none;
}

.lesson-clean-model .exercise-item:hover {
  background: #fff;
  border-color: #b7cdf0;
  transform: none;
}

.lesson-clean-model .exercise-item h3 {
  color: var(--lesson-ink);
  font-size: .94rem;
}

.lesson-clean-model .exercise-options {
  gap: 7px;
}

.lesson-clean-model .exercise-options span {
  min-width: 0;
  padding: 9px 10px;
  background: var(--lesson-soft);
  border-color: var(--lesson-line);
  border-radius: 5px;
  overflow-wrap: anywhere;
}

.lesson-clean-model .answer-highlight {
  margin-top: 14px !important;
  padding: 13px 15px;
  color: #185b43 !important;
  background: var(--lesson-green-soft);
  border: 1px solid #bfe8d7;
  border-radius: 6px;
}

.lesson-clean-model .difficulty-badge {
  border-radius: 999px;
}

/* Navegação final discreta */
.lesson-clean-model .studio-bottom-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--lesson-line);
}

.lesson-clean-model .studio-bottom-nav .button {
  min-height: 44px;
  padding: 0 15px;
  font-size: .82rem;
  border-radius: 7px;
  box-shadow: none;
}

.lesson-clean-model .studio-bottom-nav .secondary {
  color: var(--lesson-blue);
  background: #fff;
  border-color: #c9d8ed;
}

.lesson-clean-model .studio-bottom-nav .primary {
  background: var(--lesson-blue);
}

.lesson-clean-model :is(a, button, input, select, textarea):focus-visible {
  outline: 3px solid rgba(7, 94, 230, .26);
  outline-offset: 3px;
}

/* Tablet e Android */
@media (max-width: 1040px) {
  .lesson-clean-model .lesson-studio {
    width: min(900px, calc(100% - 32px));
  }

  .lesson-clean-model .studio-intro {
    min-height: 0;
    padding: 30px 0 26px;
  }

  .lesson-clean-model .studio-intro .breadcrumb {
    position: static;
    width: auto;
  }

  .lesson-clean-model .studio-intro h1 {
    margin-top: 22px;
  }

  .lesson-clean-model .lesson-mobile-anchor-toggle {
    display: flex;
    min-height: 48px;
    margin: 18px 0 6px;
    padding: 12px 14px;
    color: var(--lesson-ink);
    background: #fff;
    border: 1px solid var(--lesson-line);
    border-radius: 7px;
    box-shadow: none;
  }

  .lesson-clean-model .lesson-page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .lesson-clean-model .lesson-anchor-nav {
    display: none;
    position: static;
    grid-column: 1;
    grid-row: auto;
    width: 100%;
    max-height: 58vh;
    margin: 0 0 8px;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--lesson-line);
    border-radius: 7px;
  }

  .lesson-clean-model .lesson-anchor-nav.open {
    display: block;
  }

  .lesson-clean-model .lesson-page-layout .studio-main {
    grid-column: 1;
    grid-row: auto;
  }
}

@media (max-width: 760px) {
  .lesson-clean-model .lesson-model-header {
    min-height: 60px;
    padding: 0 14px;
  }

  .lesson-clean-model .lesson-model-header .brand {
    font-size: .96rem;
  }

  .lesson-clean-model .lesson-model-header .main-nav {
    top: calc(100% + 1px);
    right: 10px;
    left: 10px;
    gap: 0;
    padding: 8px;
    background: #fff;
    border: 1px solid var(--lesson-line);
    border-radius: 8px;
    box-shadow: 0 14px 36px rgba(25, 58, 108, .12);
  }

  .lesson-clean-model .lesson-model-header .main-nav.open,
  .lesson-clean-model .lesson-model-header .main-nav.is-open {
    display: flex;
  }

  .lesson-clean-model .lesson-model-header .main-nav a {
    width: 100%;
    min-height: 44px;
    padding: 0 12px;
    border-radius: 5px;
  }

  .lesson-clean-model .lesson-model-header .main-nav a::after {
    display: none;
  }

  .lesson-clean-model .lesson-model-header .main-nav a[aria-current="page"] {
    background: var(--lesson-blue-soft);
  }

  .lesson-clean-model .lesson-studio {
    width: min(100% - 28px, 700px);
    padding-bottom: 40px;
  }

  .lesson-clean-model .studio-intro {
    padding: 24px 0 22px;
  }

  .lesson-clean-model .studio-intro h1 {
    font-size: clamp(2.1rem, 11vw, 2.75rem);
    letter-spacing: -.045em;
  }

  .lesson-clean-model .studio-intro h1::before {
    margin-bottom: 10px;
  }

  .lesson-clean-model .studio-kicker {
    font-size: .92rem !important;
  }

  .lesson-clean-model .studio-intro p:not(.studio-kicker) {
    font-size: .92rem;
    line-height: 1.7;
  }

  .lesson-clean-model .studio-main > .study-card,
  .lesson-clean-model .studio-main > .study-card:first-child {
    padding: 28px 0 31px;
  }

  .lesson-clean-model .study-card h2 {
    font-size: 1.28rem;
  }

  .lesson-clean-model .study-card p,
  .lesson-clean-model .study-card li {
    font-size: .93rem;
    line-height: 1.72;
  }

  .lesson-clean-model .mini-grid,
  .lesson-clean-model .representation-grid,
  .lesson-clean-model .exercise-grid,
  .lesson-clean-model .studio-bottom-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-clean-model .lesson-table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    -webkit-overflow-scrolling: touch;
  }

  .lesson-clean-model .lesson-table th,
  .lesson-clean-model .lesson-table td {
    min-width: 120px;
    padding: 10px;
    font-size: .78rem;
  }

  .lesson-clean-model .math-block,
  .lesson-clean-model .worked-panel.formula-panel,
  .lesson-clean-model .single-formula-panel {
    padding: 15px 14px;
    font-size: clamp(1rem, 4.3vw, 1.24rem);
  }

  .lesson-clean-model .worked-panel:not(.formula-panel) {
    padding-left: 14px;
  }

  .lesson-clean-model .worked-panel ol li {
    padding-left: 36px;
  }

  .lesson-clean-model #pegadinhas > div,
  .lesson-clean-model .exercise-item {
    padding: 16px;
  }

  .lesson-clean-model .lesson-note {
    padding: 14px 14px 14px 42px;
  }

  .lesson-clean-model .exercise-options {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-clean-model .studio-bottom-nav .button {
    width: 100%;
  }
}

@media (max-width: 380px) {
  .lesson-clean-model .lesson-studio {
    width: calc(100% - 22px);
  }

  .lesson-clean-model .studio-intro h1 {
    font-size: 2rem;
  }

  .lesson-clean-model .study-card h2 {
    font-size: 1.16rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lesson-clean-model *,
  .lesson-clean-model *::before,
  .lesson-clean-model *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}
/* Dedução de fórmulas: explicação e transformação matemática em sequência. */
.lesson-clean-model .formula-derivation {
  margin: 24px 0 0;
}

.lesson-clean-model .formula-derivation-title {
  margin: 0;
  color: var(--lesson-ink);
  font-size: 1rem;
  font-weight: 800;
}

.lesson-clean-model .formula-derivation-steps {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: formula-step;
  border-bottom: 1px solid var(--lesson-line);
}

.lesson-clean-model .formula-derivation-step {
  display: grid;
  grid-template-columns: 28px minmax(210px, .8fr) minmax(280px, 1.2fr);
  gap: 16px;
  align-items: center;
  margin: 0;
  padding: 17px 0;
  counter-increment: formula-step;
  border-top: 1px solid var(--lesson-line);
}

.lesson-clean-model .formula-derivation-step::before {
  content: counter(formula-step);
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  color: #fff;
  font-size: .7rem;
  line-height: 1;
  font-weight: 850;
  background: var(--lesson-blue);
  border-radius: 50%;
}

.lesson-clean-model .formula-step-explanation {
  margin: 0 !important;
  color: var(--lesson-text);
  font-size: .9rem !important;
  line-height: 1.55 !important;
}

.lesson-clean-model .formula-step-expression {
  min-width: 0;
  margin: 0;
  padding: 5px 2px;
  color: var(--lesson-ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.02rem, 1.45vw, 1.28rem);
  line-height: 1.55;
  text-align: center;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  white-space: nowrap;
}

.lesson-clean-model .formula-derivation-result {
  display: grid;
  grid-template-columns: minmax(130px, .45fr) minmax(260px, 1fr);
  gap: 18px;
  align-items: center;
  margin-top: 18px;
  padding: 16px 18px;
  color: var(--lesson-ink);
  background: var(--lesson-blue-soft);
  border: 1px solid #c9ddfa;
  border-radius: 7px;
}

.lesson-clean-model .formula-derivation-result > span {
  color: var(--lesson-blue-dark);
  font-size: .78rem;
  font-weight: 850;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.lesson-clean-model .formula-derivation-result .math-line {
  min-width: 0;
  color: var(--lesson-ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.12rem, 1.8vw, 1.42rem);
  line-height: 1.55;
  text-align: center;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .lesson-clean-model .formula-derivation-step {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 8px 12px;
    align-items: start;
  }

  .lesson-clean-model .formula-step-expression {
    grid-column: 2;
    width: 100%;
    padding: 7px 0;
    text-align: left;
  }
}

@media (max-width: 760px) {
  .lesson-clean-model .formula-derivation {
    margin-top: 20px;
  }

  .lesson-clean-model .formula-derivation-step {
    padding: 15px 0;
  }

  .lesson-clean-model .formula-step-expression {
    font-size: clamp(1rem, 4.6vw, 1.18rem);
  }

  .lesson-clean-model .formula-derivation-result {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 14px;
  }

  .lesson-clean-model .formula-derivation-result .math-line {
    width: 100%;
    font-size: clamp(1.08rem, 5vw, 1.3rem);
    text-align: left;
  }
}
/* Diagramas visuais de relações e funções. */
.lesson-clean-model .function-rule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0 22px;
}
.lesson-clean-model .function-rule {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid #cfe1f5;
  border-radius: 14px;
  background: #f7fbff;
}
.lesson-clean-model .function-rule > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: #0969e8;
  font-weight: 900;
}
.lesson-clean-model .function-rule strong { color: #071943; }
.lesson-clean-model .function-rule p { margin: 3px 0 0; font-size: .92rem; }
.lesson-clean-model .function-mapping-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0;
}
.lesson-clean-model .function-mapping-card {
  min-width: 0;
  padding: 16px;
  border: 1px solid #d8e6f5;
  border-top: 4px solid #d97706;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(18, 78, 145, .07);
}
.lesson-clean-model .function-mapping-card.is-valid { border-top-color: #0e9f6e; }
.lesson-clean-model .function-mapping-card h3 {
  margin: 0 0 12px;
  color: #071943;
  font-size: 1rem;
  line-height: 1.35;
}
.lesson-clean-model .function-mapping-visual {
  overflow: hidden;
  border: 1px solid #e0eaf5;
  border-radius: 14px;
  background: #f9fbfe;
}
.lesson-clean-model .function-mapping-visual svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 210px;
}
.lesson-clean-model .mapping-set-shape { fill: #eef3ff; stroke: #8194b3; stroke-width: 2; }
.lesson-clean-model .mapping-nodes circle { fill: #12244d; }
.lesson-clean-model .mapping-nodes circle.is-alert { fill: #d97706; }
.lesson-clean-model .mapping-nodes text,
.lesson-clean-model .mapping-set-name { fill: #34435f; font-family: Inter, Arial, sans-serif; font-size: 14px; font-weight: 800; }
.lesson-clean-model .mapping-set-name { text-anchor: middle; }
.lesson-clean-model .mapping-arrow { fill: none; stroke: #d97706; stroke-width: 2.5; }
.lesson-clean-model .function-mapping-card.is-valid .mapping-arrow { stroke: #0e9f6e; }
.lesson-clean-model .mapping-arrow-head { fill: #d97706; }
.lesson-clean-model .function-mapping-card.is-valid .mapping-arrow-head { fill: #0e9f6e; }
.lesson-clean-model .function-mapping-card > p { margin: 8px 0 0; font-size: .9rem; }
.lesson-clean-model .function-mapping-verdict { font-weight: 900; color: #b45309; }
.lesson-clean-model .function-mapping-card.is-valid .function-mapping-verdict { color: #087a55; }
@media (max-width: 760px) {
  .lesson-clean-model .function-rule-grid,
  .lesson-clean-model .function-mapping-grid { grid-template-columns: 1fr; }
  .lesson-clean-model .function-mapping-card { padding: 13px; }
  .lesson-clean-model .function-mapping-visual svg { min-height: 0; }
}
/* Organização pedagógica da aula de conceito de função. */
.lesson-clean-model .function-case-heading {
  grid-column: 1 / -1;
  margin: 4px 0 -4px;
  padding: 0 2px 8px;
  border-bottom: 1px solid #dbe6f2;
  color: #9a4f08;
  font-size: .95rem;
  letter-spacing: .02em;
}
.lesson-clean-model .function-case-heading.is-valid { margin-top: 10px; color: #087a55; }
.lesson-clean-model .function-representation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 22px;
}
.lesson-clean-model .function-representation-item {
  min-width: 0;
  padding: 16px;
  border: 1px solid #d8e6f5;
  border-radius: 15px;
  background: #f9fbfe;
}
.lesson-clean-model .function-representation-item > strong {
  display: block;
  margin-bottom: 10px;
  color: #075fca;
  font-size: .92rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.lesson-clean-model .function-representation-item .math-line {
  overflow-x: auto;
  padding: 8px 0;
  color: #071943;
  font-size: 1.08rem;
  white-space: nowrap;
}
.lesson-clean-model .function-representation-item small { color: #5d6f8b; }
.lesson-clean-model .function-representation-item table {
  width: 100%;
  border-collapse: collapse;
  text-align: center;
}
.lesson-clean-model .function-representation-item th,
.lesson-clean-model .function-representation-item td {
  padding: 6px 10px;
  border-bottom: 1px solid #dbe6f2;
}
.lesson-clean-model .function-representation-item th { color: #075fca; }
.lesson-clean-model .function-mini-graph svg { display: block; width: 100%; max-height: 185px; }
.lesson-clean-model .function-axis { fill: none; stroke: #62748e; stroke-width: 1.7; }
.lesson-clean-model .function-graph-line { fill: none; stroke: #0969e8; stroke-width: 3; }
.lesson-clean-model .function-graph-points circle { fill: #0969e8; }
.lesson-clean-model .function-graph-labels { fill: #34435f; font-family: Inter, Arial, sans-serif; font-size: 11px; font-weight: 700; }
@media (max-width: 760px) {
    .lesson-clean-model .function-case-heading { grid-column: 1; }
  .lesson-clean-model .function-representation { grid-template-columns: 1fr; }
}
/* Relações e teste cartesiano para o conceito de função. */
.lesson-clean-model .function-relations-table-wrap {
  overflow-x: auto;
  margin: 18px 0 22px;
  border: 1px solid #d8e6f5;
  border-radius: 16px;
  background: #fff;
  scrollbar-width: thin;
}
.lesson-clean-model .function-relations-table {
  width: 100%;
  min-width: 840px;
  border-collapse: collapse;
  color: #34435f;
  font-size: .92rem;
}
.lesson-clean-model .function-relations-table th,
.lesson-clean-model .function-relations-table td {
  padding: 13px 15px;
  border-bottom: 1px solid #e1eaf4;
  text-align: left;
  vertical-align: top;
}
.lesson-clean-model .function-relations-table thead th {
  color: #071943;
  background: #eef5fd;
  font-weight: 900;
}
.lesson-clean-model .function-relations-table tbody th { color: #075fca; white-space: nowrap; }
.lesson-clean-model .function-relations-table tbody tr:last-child > * { border-bottom: 0; }
.lesson-clean-model .function-relations-table tr.is-invalid strong { color: #a75009; }
.lesson-clean-model .function-relations-table tr.is-valid strong { color: #087a55; }
.lesson-clean-model .cartesian-check-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.lesson-clean-model .cartesian-check-card {
  min-width: 0;
  padding: 15px;
  border: 1px solid #d8e6f5;
  border-top: 4px solid #d97706;
  border-radius: 16px;
  background: #f9fbfe;
}
.lesson-clean-model .cartesian-check-card.is-valid { border-top-color: #0e9f6e; }
.lesson-clean-model .cartesian-check-card h3 { margin: 0 0 8px; color: #071943; font-size: 1rem; }
.lesson-clean-model .cartesian-check-card svg { display: block; width: 100%; height: auto; margin: 4px 0 8px; }
.lesson-clean-model .cartesian-check-card p { margin: 0; font-size: .88rem; }
.lesson-clean-model .cartesian-axis { fill: none; stroke: #6b7c95; stroke-width: 1.7; }
.lesson-clean-model .cartesian-curve,
.lesson-clean-model .cartesian-closed-curve { fill: none; stroke: #0969e8; stroke-width: 3; }
.lesson-clean-model .cartesian-test-line { fill: none; stroke: #d97706; stroke-width: 2; stroke-dasharray: 6 5; }
.lesson-clean-model .cartesian-hit { fill: #d97706; }
.lesson-clean-model .cartesian-axis-label,
.lesson-clean-model .cartesian-gap-label { fill: #34435f; font-family: Inter, Arial, sans-serif; font-size: 11px; font-weight: 800; }
@media (max-width: 940px) {
  .lesson-clean-model .cartesian-check-grid { grid-template-columns: 1fr; }
  .lesson-clean-model .cartesian-check-card svg { max-height: 220px; }
}
/* Largura de leitura padronizada em todas as páginas de aula. */
@media (min-width: 1041px) {
  body.lesson-clean-model {
    --lesson-reading-width: 980px;
  }

  body.lesson-clean-model .studio-intro {
    width: min(100%, calc(var(--lesson-sidebar-width) + 36px + var(--lesson-reading-width)));
  }

  body.lesson-clean-model .studio-intro > div:first-child,
  body.lesson-clean-model .lesson-page-layout .studio-main {
    width: min(100%, var(--lesson-reading-width));
    max-width: var(--lesson-reading-width);
  }

  body.lesson-clean-model .lesson-page-layout .studio-main {
    justify-self: start;
  }
}
/* Diagramas das relações iniciais de função. */
body.lesson-clean-model.function-concept-page #conceito .set-pair-summary {
  display: inline-flex;
  width: auto;
  min-width: 0;
  max-width: 100%;
  align-items: center;
  flex-wrap: wrap;
  margin: 16px 0;
  padding: 9px 16px;
  color: #071943;
  font-size: clamp(1.05rem, 1.45vw, 1.22rem);
  line-height: 1.3;
  text-align: left;
  background: #f5f9ff;
  border: 1px solid #c9ddfa;
  border-left: 4px solid var(--lesson-blue);
  border-radius: 10px;
}
body.lesson-clean-model.function-concept-page #conceito .set-pair-summary span {
  white-space: nowrap;
}
body.lesson-clean-model.function-concept-page #conceito .set-pair-summary span + span {
  margin-left: 20px;
  padding-left: 20px;
  border-left: 1px solid #b8cfea;
}
body.lesson-clean-model.function-concept-page .initial-relations-heading {
  margin: 28px 0 6px;
}
body.lesson-clean-model.function-concept-page .initial-relations-diagram-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 22px;
}
body.lesson-clean-model.function-concept-page .initial-relation-diagram {
  min-width: 0;
  padding: 14px;
  border: 1px solid #d8e6f5;
  border-top: 4px solid #d97706;
  border-radius: 16px;
  background: #f9fbfe;
}
body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-valid { border-top-color: #0e9f6e; }
body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-centered {
  grid-column: 1 / -1;
  width: calc(50% - 7px);
  justify-self: center;
}
body.lesson-clean-model.function-concept-page .initial-relation-diagram h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 4px;
  color: #071943;
  font-size: .98rem;
}
body.lesson-clean-model.function-concept-page .initial-relation-diagram h4 span {
  display: inline-grid;
  width: 26px;
  height: 26px;
  place-items: center;
  color: #fff;
  background: #d97706;
  border-radius: 7px;
  font-weight: 900;
}
body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-valid h4 span { background: #0e9f6e; }
body.lesson-clean-model.function-concept-page .initial-relation-diagram svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 205px;
}
body.lesson-clean-model.function-concept-page .initial-relation-diagram > p {
  margin: 5px 0 0;
  font-size: .88rem;
}
body.lesson-clean-model.function-concept-page .initial-set { fill: #eef3ff; stroke: #8194b3; stroke-width: 1.8; }
body.lesson-clean-model.function-concept-page .initial-set-label { fill: #34435f; text-anchor: middle; font: 800 12px Inter, Arial, sans-serif; }
body.lesson-clean-model.function-concept-page .initial-nodes circle { fill: #12244d; }
body.lesson-clean-model.function-concept-page .initial-nodes circle.is-alert { fill: #d97706; }
body.lesson-clean-model.function-concept-page .initial-nodes text { fill: #34435f; font: 800 11px Inter, Arial, sans-serif; }
body.lesson-clean-model.function-concept-page .initial-arrows line { stroke: #d97706; stroke-width: 2.2; }
body.lesson-clean-model.function-concept-page .initial-arrow-head { fill: #d97706; }
body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-valid .initial-arrows line { stroke: #0e9f6e; }
body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-valid .initial-arrow-head { fill: #0e9f6e; }
body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-invalid > p strong { color: #a75009; }
body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-valid > p strong { color: #087a55; }
@media (max-width: 760px) {
  body.lesson-clean-model.function-concept-page #conceito .set-pair-summary {
    max-width: 100%;
    padding: 9px 13px;
  }
  body.lesson-clean-model.function-concept-page .initial-relations-diagram-grid { grid-template-columns: 1fr; }
  body.lesson-clean-model.function-concept-page .initial-relation-diagram.is-centered { grid-column: 1; width: 100%; }
}
@media (max-width: 480px) {
  body.lesson-clean-model.function-concept-page #conceito .set-pair-summary {
    display: flex;
    width: fit-content;
    align-items: flex-start;
    flex-direction: column;
  }
  body.lesson-clean-model.function-concept-page #conceito .set-pair-summary span + span {
    width: 100%;
    margin: 7px 0 0;
    padding: 7px 0 0;
    border-top: 1px solid #b8cfea;
    border-left: 0;
  }
}
/* Leitura pedagógica da definição de função. */
body.lesson-clean-model.function-concept-page .definition-decoder {
  margin: 14px 0 18px;
  border-top: 1px solid #d8e6f5;
  border-bottom: 1px solid #d8e6f5;
}
body.lesson-clean-model.function-concept-page .definition-decoder-row {
  display: grid;
  grid-template-columns: 165px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 12px 2px;
  border-bottom: 1px solid #e1eaf4;
}
body.lesson-clean-model.function-concept-page .definition-decoder-row:last-child { border-bottom: 0; }
body.lesson-clean-model.function-concept-page .definition-decoder-row p { margin: 0; }
body.lesson-clean-model.function-concept-page .definition-symbol {
  color: #075fca;
  font: italic 700 1.06rem/1.35 Georgia, "Times New Roman", serif;
  white-space: nowrap;
}
body.lesson-clean-model.function-concept-page .definition-example-check {
  margin: 18px 0;
  padding: 13px 16px;
  color: #245c4b;
  background: #f0fbf7;
  border-left: 4px solid #0e9f6e;
  border-radius: 8px;
}
body.lesson-clean-model.function-concept-page .definition-example-check > p { margin: 0 0 8px; }
body.lesson-clean-model.function-concept-page .definition-example-check ul { margin: 0; padding-left: 1.2rem; }
body.lesson-clean-model.function-concept-page .definition-example-check li + li { margin-top: 6px; }
@media (max-width: 620px) {
  body.lesson-clean-model.function-concept-page .definition-decoder-row {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}
/* Links contextuais para revisar pré-requisitos em outras aulas */
body.lesson-clean-model .prerequisite-link {
  color: #075fd8;
  font-weight: 700;
  text-decoration-line: underline;
  text-decoration-style: dotted;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}
body.lesson-clean-model .prerequisite-link:not(.prerequisite-symbol)::after {
  content: " →";
  display: inline;
  font-size: .78em;
  font-weight: 800;
  white-space: nowrap;
}
body.lesson-clean-model .prerequisite-link:hover {
  color: #004bb5;
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}
body.lesson-clean-model .prerequisite-link:focus-visible {
  border-radius: 3px;
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}
body.lesson-clean-model .prerequisite-link.prerequisite-symbol {
  font-family: Georgia, "Times New Roman", serif;
}
/* Domínio, classificações e leitura gráfica na aula de função */
.lesson-clean-model .concept-formula-line { display:block; width:fit-content; max-width:100%; margin:12px 0 16px; padding:0; overflow-x:auto; color:#0b3f82; background:transparent; border:0; font:italic 700 1.22rem/1.55 Georgia,"Times New Roman",serif; white-space:nowrap; }
.lesson-clean-model .clean-concept-list { margin:10px 0 18px; padding-left:1.35rem; }
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.lesson-clean-model .clean-function-example p { margin:0; }
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@media (max-width:900px) {
  .lesson-clean-model .classification-summary-grid { grid-template-columns:1fr; }
  .lesson-clean-model .graph-reading-layout { grid-template-columns:1fr; }
  .lesson-clean-model .classification-visual { overflow-x:auto; }
  .lesson-clean-model .classification-visual svg { min-width:720px; }
}
/* Diagrama limpo de domínio, contradomínio e imagem */
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.lesson-clean-model .function-sets-canvas { overflow-x:auto; padding:2px 0 8px; }
.lesson-clean-model .function-sets-canvas svg { display:block; width:100%; min-width:560px; max-width:740px; height:auto; margin:0 auto; }
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.lesson-clean-model .function-sets-visual figcaption strong { color:#0b5fc6; }
@media (max-width:680px) { .lesson-clean-model .function-sets-canvas svg { min-width:520px; } .lesson-clean-model .function-sets-visual figcaption { justify-content:flex-start; } }

/* Diagramas separados de funções injetora, sobrejetora e bijetora */
.lesson-clean-model .classification-single-visual {
  width: min(100%, 390px);
  margin: 18px 0 22px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  overflow: visible;
}
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@media (max-width: 900px) {
  .lesson-clean-model .classification-single-visual { overflow: visible; }
  .lesson-clean-model .classification-single-visual svg { min-width: 0; }
}
/* Gráficos cartesianos das classificações de funções */
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.lesson-clean-model .classification-graph-visual svg { display:block; width:100%; height:auto; }
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.lesson-clean-model .classification-graph-hit { fill:#d97706; stroke:#fff; stroke-width:2; }
.lesson-clean-model .classification-graph-muted-area { fill:#eef2f7; opacity:.82; }
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.lesson-clean-model .classification-graph-note { fill:#6b4a12; font-size:11px; }
@media (max-width:560px) {
  .lesson-clean-model .classification-graph-visual { width:100%; overflow-x:auto; }
  .lesson-clean-model .classification-graph-visual svg { min-width:430px; }
}

/* Nível Avançada nos exercícios das aulas */
.lesson-clean-model .difficulty-badge.advanced { color:#6f42b5; background:#f2ebff; }

/* Exemplos comentados: leitura linear, explicada e sem grade de cards */
.lesson-clean-model .commented-examples { margin-top: 26px; }
.lesson-clean-model .commented-example { padding: 30px 0 34px; border-top: 1px solid var(--lesson-line); }
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.lesson-clean-model .commented-example-heading > span { display: grid; flex: 0 0 30px; width: 30px; height: 30px; place-items: center; color: #fff; font-size: .82rem; font-weight: 850; background: var(--lesson-blue); border-radius: 50%; }
.lesson-clean-model .commented-example-heading h3 { margin: 0; color: var(--lesson-ink); font-size: 1.08rem; line-height: 1.35; }
.lesson-clean-model .commented-question { margin: 0 0 20px; padding: 2px 0 2px 16px; color: var(--lesson-text); border-left: 3px solid #8dbcf4; }
.lesson-clean-model .commented-solution { margin: 0; padding: 0; list-style: none; counter-reset: commented-step; }
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.lesson-clean-model .commented-contrast { margin: 12px 0 0; color: #53647d; font-size: .91rem; }
.lesson-clean-model .compact-example-table { width: min(100%, 360px); margin: 10px 0 2px; }
.lesson-clean-model .compact-example-table th,
.lesson-clean-model .compact-example-table td { padding: 8px 12px; text-align: center; }
@media (max-width: 620px) {
  .lesson-clean-model .commented-example { padding: 26px 0 30px; }
  .lesson-clean-model .commented-solution > li { padding-left: 40px; }
  .lesson-clean-model .commented-solution .math-line { width: 100%; }
}
/* Gráficos inseridos nas resoluções dos exemplos comentados */
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@media (max-width: 560px) {
  .lesson-clean-model .commented-graph { padding: 10px 8px 8px; overflow-x: auto; }
  .lesson-clean-model .commented-graph svg { min-width: 430px; }
}
/* Página de Função afim: comparações, gráficos e leitura pedagógica */
body.lesson-clean-model.affine-function-page .affine-value-table { width: min(100%, 720px); }
body.lesson-clean-model.affine-function-page .affine-family-list { margin-top: 22px; border-top: 1px solid var(--lesson-line); }
body.lesson-clean-model.affine-function-page .affine-family-list > div { display: grid; grid-template-columns: 170px minmax(160px, 210px) minmax(0, 1fr); gap: 18px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--lesson-line); }
body.lesson-clean-model.affine-function-page .affine-family-list strong { color: var(--lesson-ink); }
body.lesson-clean-model.affine-function-page .affine-family-list .math-line { color: #0b4f9e; font-family: Georgia,"Times New Roman",serif; font-size: 1.14rem; }
body.lesson-clean-model.affine-function-page .affine-family-list p { margin: 0; }
body.lesson-clean-model.affine-function-page .affine-coefficient-reading { margin: 20px 0; border-top: 1px solid var(--lesson-line); }
body.lesson-clean-model.affine-function-page .affine-coefficient-reading p { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: center; margin: 0; padding: 13px 0; border-bottom: 1px solid var(--lesson-line); }
body.lesson-clean-model.affine-function-page .affine-coefficient-reading strong { display: grid; width: 34px; height: 34px; place-items: center; color: #fff; background: var(--lesson-blue); border-radius: 50%; font-family: Georgia,"Times New Roman",serif; font-size: 1.08rem; }
body.lesson-clean-model.affine-function-page .affine-graph-figure { width: min(100%, 620px); margin: 24px 0 8px; padding: 12px 14px 10px; background: #fbfdff; border: 1px solid var(--lesson-line); border-radius: 8px; overflow: hidden; }
body.lesson-clean-model.affine-function-page .affine-graph-figure svg { display: block; width: 100%; height: auto; }
body.lesson-clean-model.affine-function-page .affine-graph-figure figcaption { margin-top: 6px; color: #52647f; font-size: .86rem; line-height: 1.55; }
body.lesson-clean-model.affine-function-page .affine-axis { fill: none; stroke: #667b96; stroke-width: 1.8; }
body.lesson-clean-model.affine-function-page .affine-grid { fill: none; stroke: #dce6f2; stroke-width: 1; }
body.lesson-clean-model.affine-function-page .affine-line { fill: none; stroke: #0874e8; stroke-width: 3.4; stroke-linecap: round; }
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body.lesson-clean-model.affine-function-page .affine-line.is-tertiary { stroke: #8758c7; }
body.lesson-clean-model.affine-function-page .affine-points circle { fill: #0874e8; stroke: #fff; stroke-width: 2.5; }
body.lesson-clean-model.affine-function-page .affine-guides line { stroke: #8b9bb0; stroke-width: 1.2; stroke-dasharray: 5 4; }
body.lesson-clean-model.affine-function-page .affine-intersection { fill: #d97706; stroke: #fff; stroke-width: 2.5; }
body.lesson-clean-model.affine-function-page .affine-labels { fill: #34435f; font: 700 12px Inter,Arial,sans-serif; }
body.lesson-clean-model.affine-function-page .affine-formula-label { fill: #0b4f9e; font: italic 700 14px Georgia,"Times New Roman",serif; }
body.lesson-clean-model.affine-function-page .affine-sign-line { display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch; width: min(100%, 720px); margin: 22px 0 8px; border-top: 2px solid #7c8da5; border-bottom: 2px solid #7c8da5; }
body.lesson-clean-model.affine-function-page .affine-sign-line > * { display: grid; min-height: 74px; padding: 12px 14px; place-items: center; text-align: center; }
body.lesson-clean-model.affine-function-page .affine-sign-line strong { min-width: 112px; color: #0b4f9e; background: var(--lesson-blue-soft); border-right: 1px solid var(--lesson-line); border-left: 1px solid var(--lesson-line); }
body.lesson-clean-model.affine-function-page .affine-sign-line .is-positive { color: #087a55; background: #edf9f4; }
body.lesson-clean-model.affine-function-page .affine-sign-line .is-negative { color: #a75009; background: #fff7ea; }
body.lesson-clean-model.affine-function-page .affine-short-derivation .formula-derivation-step { grid-template-columns: 28px minmax(200px,.7fr) minmax(320px,1.3fr); }
@media (max-width: 760px) {
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  body.lesson-clean-model.affine-function-page .affine-graph-figure { padding: 10px 8px 8px; overflow-x: auto; }
  body.lesson-clean-model.affine-function-page .affine-graph-figure svg { min-width: 500px; }
  body.lesson-clean-model.affine-function-page .affine-sign-line { grid-template-columns: 1fr; border: 1px solid var(--lesson-line); }
  body.lesson-clean-model.affine-function-page .affine-sign-line strong { order: 2; border: 0; border-top: 1px solid var(--lesson-line); border-bottom: 1px solid var(--lesson-line); }
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  body.lesson-clean-model.affine-function-page .affine-sign-line .is-negative { order: 3; }
}
/* Função afim: texto comum separado das expressões matemáticas. */
body.lesson-clean-model.affine-function-page .affine-mixed-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: .35rem;
}

body.lesson-clean-model.affine-function-page .affine-mixed-formula .math-connector {
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  font-size: inherit;
  font-style: inherit;
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