:root {
  --color-bg: #f6f1e7;
  --color-primary: #bc7b4a;
  --color-accent: #e91e8c;
  --color-text: #211d2c;
  --color-card: #ffffff;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

#app {
  min-height: 100vh;
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
}

.raizlex-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.raizlex-header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.busca-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-card);
  border: 1px solid rgba(33, 29, 44, 0.08);
  text-decoration: none;
  font-size: 15px;
}

.raizlex-logo-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

.raizlex-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  background: var(--color-primary);
  padding: 36px 24px 40px;
  color: var(--color-bg);
  margin-bottom: 24px;
}

.hero-blob {
  position: absolute;
  right: -40px;
  bottom: -60px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.9;
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.85;
  margin: 0 0 8px;
  position: relative;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 34px;
  line-height: 1.08;
  margin: 0 0 12px;
  position: relative;
}

.hero-subtitle {
  font-size: 15px;
  line-height: 1.5;
  margin: 0;
  max-width: 88%;
  opacity: 0.95;
  position: relative;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  margin: 8px 0 14px;
}

.placeholder-card {
  background: var(--color-card);
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(33, 29, 44, 0.06);
  border: 1px solid rgba(33, 29, 44, 0.06);
  margin-bottom: 12px;
}

.placeholder-card h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 600;
}

.placeholder-card p {
  margin: 0;
  font-size: 13px;
  color: rgba(33, 29, 44, 0.6);
}

.chip {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(233, 30, 140, 0.12);
  color: var(--color-accent);
  margin-top: 8px;
}

.footer-note {
  margin-top: auto;
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  color: rgba(33, 29, 44, 0.45);
}

.footer-note a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

/* Temas */
.tema-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.tema-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--color-card);
  border-radius: 16px;
  padding: 18px 16px;
  text-decoration: none;
  color: var(--color-text);
  border: 1px solid rgba(33, 29, 44, 0.06);
  box-shadow: 0 1px 3px rgba(33, 29, 44, 0.06);
  transition: transform 0.15s ease;
}

.tema-card:active {
  transform: scale(0.97);
}

.tema-card-nome {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
}

.tema-card-count {
  font-size: 12px;
  color: rgba(33, 29, 44, 0.5);
}

/* Navegação */
.back-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  margin-bottom: 8px;
}

/* Filtros por nível */
.filtros {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 18px;
}

.filtro-chip {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-text);
  border: 1px solid rgba(33, 29, 44, 0.1);
  text-decoration: none;
  white-space: nowrap;
}

.filtro-chip-ativo {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
}

/* Lista de materiais */
.materiais-lista {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.material-card {
  display: block;
  background: var(--color-card);
  border-radius: 16px;
  padding: 16px;
  text-decoration: none;
  color: var(--color-text);
  border: 1px solid rgba(33, 29, 44, 0.06);
  box-shadow: 0 1px 3px rgba(33, 29, 44, 0.06);
}

.material-card-topo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.material-card h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 600;
}

.material-card p {
  margin: 0;
  font-size: 13px;
  color: rgba(33, 29, 44, 0.6);
}

.tipo-badge {
  font-size: 12px;
  font-weight: 600;
  color: rgba(33, 29, 44, 0.6);
}

.empty-state {
  text-align: center;
  color: rgba(33, 29, 44, 0.5);
  font-size: 14px;
  padding: 32px 0;
}

/* Tela de material */
.material-topo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.material-descricao {
  font-size: 14px;
  color: rgba(33, 29, 44, 0.65);
  margin: 0 0 20px;
}

.material-explicacao {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(33, 29, 44, 0.1);
}

.material-explicacao h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--color-primary);
  margin: 0 0 16px;
}

.material-explicacao h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  color: var(--color-primary);
  margin: 24px 0 10px;
  padding: 10px 14px;
  background: rgba(188, 123, 74, 0.12);
  border-radius: 10px;
}

.material-explicacao h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-accent);
  margin: 18px 0 8px;
}

.material-explicacao p {
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 10px;
}

.material-explicacao ul {
  margin: 0 0 14px;
  padding-left: 20px;
}

.material-explicacao li {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 6px;
}

.material-explicacao strong {
  color: var(--color-text);
  font-weight: 700;
}

.material-explicacao a {
  color: var(--color-accent);
  font-weight: 600;
}

.material-explicacao table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  font-size: 14px;
}

.material-explicacao th,
.material-explicacao td {
  text-align: left;
  padding: 8px 10px;
  border: 1px solid rgba(33, 29, 44, 0.12);
}

.material-explicacao th {
  background: rgba(188, 123, 74, 0.12);
  color: var(--color-primary);
  font-weight: 600;
}

.conteudo-embed {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: 16px;
  overflow: hidden;
  background: #000;
}

.conteudo-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.botao-abrir {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-primary);
  color: var(--color-bg);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 16px;
  border-radius: 14px;
}

/* Progresso */
.progresso-barra {
  margin-top: 12px;
  height: 8px;
  border-radius: 999px;
  background: rgba(33, 29, 44, 0.08);
  overflow: hidden;
}

.progresso-barra-preenchida {
  height: 100%;
  background: var(--color-accent);
  border-radius: 999px;
  transition: width 0.2s ease;
}

.material-card-estudado {
  opacity: 0.7;
}

.estudado-badge {
  font-size: 13px;
}

.botao-estudado {
  display: block;
  width: 100%;
  margin-top: 16px;
  background: var(--color-card);
  border: 1px solid rgba(33, 29, 44, 0.15);
  color: var(--color-text);
  font-weight: 600;
  font-size: 15px;
  padding: 14px;
  border-radius: 14px;
  cursor: pointer;
}

.botao-estudado-ativo {
  background: rgba(233, 30, 140, 0.1);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Busca */
.busca-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(33, 29, 44, 0.15);
  background: var(--color-card);
  color: var(--color-text);
  margin-bottom: 18px;
}

.busca-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* Login e cadastro */
.auth-tela {
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.auth-erro {
  margin: 0;
  font-size: 13px;
  color: var(--color-accent);
  min-height: 16px;
}

.auth-troca {
  margin-top: 20px;
  text-align: center;
  font-size: 14px;
  color: rgba(33, 29, 44, 0.6);
}

.auth-troca a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.botao-sair {
  display: block;
  margin: 28px auto 0;
  background: none;
  border: none;
  color: rgba(33, 29, 44, 0.5);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  padding: 8px;
}

.botao-sair:hover {
  color: var(--color-text);
}

/* Exercícios */
.exercicio-guia {
  background: var(--color-card);
  border-radius: 14px;
  padding: 18px 18px 4px;
  margin-bottom: 20px;
  border: 1px solid rgba(33, 29, 44, 0.06);
}

.exercicio-guia-titulo {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin: 0 0 16px;
}

.exercicio-guia dl {
  margin: 0;
}

.exercicio-guia dt {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 14px;
  margin: 0 0 6px;
}

.exercicio-guia dd {
  margin: 0 0 28px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(33, 29, 44, 0.75);
}

.exercicio-guia dd:last-of-type {
  margin-bottom: 4px;
}

.exercicio-parte {
  margin-bottom: 28px;
}

.exercicio-parte-titulo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  margin: 0 0 4px;
}

.exercicio-parte-instrucao {
  font-size: 13px;
  color: rgba(33, 29, 44, 0.65);
  margin: 0 0 14px;
  line-height: 1.5;
}

.exercicio-parte-titulo-respostas {
  font-weight: 700;
  font-size: 13px;
  color: var(--color-primary);
  margin: 0 0 6px;
}

.exercicio-instrucao {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 12px;
}

.exercicio-banco {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.exercicio-banco-item {
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(188, 123, 74, 0.12);
  color: var(--color-primary);
}

.exercicio-lista {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0;
  margin: 0 0 16px;
  list-style: none;
}

.exercicio-item {
  background: var(--color-card);
  border-radius: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(33, 29, 44, 0.06);
  box-shadow: 0 1px 3px rgba(33, 29, 44, 0.06);
}

.exercicio-item-numero {
  font-weight: 700;
  color: var(--color-accent);
  margin-right: 6px;
}

.exercicio-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}

.exercicio-blank {
  display: inline-block;
  font-weight: 700;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  padding: 0 2px;
}

.exercicio-respostas {
  background: var(--color-card);
  border-radius: 14px;
  padding: 4px 16px;
  border: 1px solid rgba(33, 29, 44, 0.06);
  margin-bottom: 16px;
}

.exercicio-respostas summary {
  padding: 14px 0;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-primary);
  cursor: pointer;
}

.exercicio-respostas ol {
  margin: 0 0 14px;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(33, 29, 44, 0.75);
}

.exercicio-explicacao {
  font-size: 13px;
  font-style: italic;
  color: rgba(33, 29, 44, 0.55);
}

/* Respostas abertas */
.aberta-parte {
  margin-bottom: 24px;
}

.aberta-parte-titulo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  margin: 0 0 4px;
}

.aberta-parte-instrucao {
  font-size: 13px;
  color: rgba(33, 29, 44, 0.65);
  margin: 0 0 14px;
  line-height: 1.5;
}

.aberta-pergunta {
  margin-bottom: 14px;
}

.aberta-pergunta-texto {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.aberta-textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(33, 29, 44, 0.15);
  background: var(--color-card);
  color: var(--color-text);
  resize: vertical;
}

.aberta-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.aberta-status {
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  min-height: 16px;
  margin-top: 10px;
}

.material-card-tema {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-primary);
  margin-bottom: 4px;
}