:root {
  --oceano: #0e7c86;
  --oceano-escuro: #0a5b63;
  --turquesa: #20b2aa;
  --coral: #ff7f66;
  --areia: #f6efe3;
  --areia-escura: #efe3cc;
  --texto: #24333b;
  --texto-suave: #5c6f79;
  --branco: #ffffff;
  --sombra: 0 4px 18px rgba(14, 76, 86, 0.12);
  --raio: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--areia);
  color: var(--texto);
  line-height: 1.6;
}

#app { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--oceano) 0%, var(--oceano-escuro) 100%);
  color: var(--branco);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.brand-flag { width: 52px; height: auto; border-radius: 4px; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3); }
.brand-text h1 { font-size: 26px; font-weight: 800; letter-spacing: 0.5px; }
.brand-text p { font-size: 12px; opacity: 0.85; }

.nav { display: flex; flex-direction: column; gap: 6px; flex-grow: 1; }

.nav-item {
  background: transparent;
  border: none;
  color: var(--branco);
  font-size: 16px;
  text-align: left;
  padding: 12px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s;
}
.nav-item:hover { background: rgba(255, 255, 255, 0.12); }
.nav-item.active { background: var(--coral); font-weight: 600; }

.sidebar-footer { font-size: 12px; opacity: 0.8; margin-top: 20px; }

/* ---------- Conteúdo ---------- */
.content {
  flex: 1;
  padding: 32px 40px;
  max-width: 920px;
  margin: 0 auto;
  width: 100%;
}

.view-header { margin-bottom: 24px; }
.view-header h2 { font-size: 28px; font-weight: 800; color: var(--oceano-escuro); }
.view-header p { color: var(--texto-suave); margin-top: 4px; }

.card {
  background: var(--branco);
  border-radius: var(--raio);
  box-shadow: var(--sombra);
  padding: 24px;
  margin-bottom: 16px;
}

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.btn {
  display: inline-block;
  background: var(--oceano);
  color: var(--branco);
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 15px;
  cursor: pointer;
  transition: filter 0.15s, transform 0.05s;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: scale(0.98); }
.btn.coral { background: var(--coral); }
.btn.ghost { background: transparent; color: var(--oceano); border: 2px solid var(--oceano); }
.btn.ghost:hover { background: rgba(14, 124, 134, 0.08); }
.btn.small { padding: 6px 14px; font-size: 13px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

select, input[type="text"] {
  font: inherit;
  padding: 9px 12px;
  border: 2px solid var(--areia-escura);
  border-radius: 10px;
  background: var(--branco);
  color: var(--texto);
  min-width: 200px;
}
select:focus, input[type="text"]:focus { outline: none; border-color: var(--oceano); }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 13px; font-weight: 600; color: var(--texto-suave); }

/* ---------- Home ---------- */
.hero {
  background: linear-gradient(135deg, var(--oceano), var(--turquesa));
  color: var(--branco);
  border-radius: var(--raio);
  padding: 36px;
  margin-bottom: 24px;
}
.hero h2 { font-size: 32px; margin-bottom: 8px; }
.hero p { font-size: 17px; opacity: 0.95; }
.hero .btn { margin-top: 18px; background: var(--coral); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat {
  background: var(--branco);
  border-radius: var(--raio);
  box-shadow: var(--sombra);
  padding: 18px;
  text-align: center;
}
.stat .valor { font-size: 30px; font-weight: 800; color: var(--oceano); }
.stat .rotulo { font-size: 13px; color: var(--texto-suave); }

.home-card { cursor: pointer; transition: transform 0.1s, box-shadow 0.1s; }
.home-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14, 76, 86, 0.18); }
.home-card h3 { color: var(--oceano-escuro); margin-bottom: 6px; }
.home-card p { color: var(--texto-suave); font-size: 14px; }
.home-card .icone { font-size: 30px; margin-bottom: 8px; }

/* ---------- Lições ---------- */
.breadcrumb { font-size: 13px; color: var(--texto-suave); margin-bottom: 14px; }
.breadcrumb button { background: none; border: none; color: var(--oceano); cursor: pointer; font: inherit; padding: 0 4px; }
.breadcrumb button:hover { text-decoration: underline; }

/* Cards de módulos */
.lesson-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  text-align: left;
  width: 100%;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s, border-color 0.1s;
}
.lesson-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14, 76, 86, 0.18); }
.lesson-card-top { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.lesson-card-count { font-size: 13px; color: var(--texto-suave); }
.lesson-card-titulo { font-size: 17px; font-weight: 700; color: var(--oceano-escuro); line-height: 1.3; }
.lesson-card-sub { font-size: 13px; color: var(--texto-suave); }
.lesson-card-seta { font-size: 18px; color: var(--oceano); align-self: flex-end; margin-top: 4px; }

/* Lista de lições de um módulo */
.lesson-list { padding: 6px; }
.lesson-list .lesson-item {
  border-bottom: 1px solid var(--areia-escura);
}
.lesson-list .lesson-item:last-child { border-bottom: none; }

.lesson-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 10px;
  background: none;
  border: none;
  border-radius: 10px;
  font: inherit;
  font-size: 16px;
  text-align: left;
  cursor: pointer;
  color: var(--texto);
  transition: background 0.12s, color 0.12s;
}
.lesson-link:hover { background: var(--areia); color: var(--oceano); }
.lesson-link-nome { flex: 1; }
.lesson-link-seta { color: var(--oceano); font-weight: 700; opacity: 0; transition: opacity 0.12s, transform 0.12s; }
.lesson-link:hover .lesson-link-seta { opacity: 1; transform: translateX(3px); }
.lesson-list .badge { background: var(--areia-escura); color: var(--oceano-escuro); border-radius: 999px; padding: 2px 10px; font-size: 12px; font-weight: 700; }

.lesson-body h3 { color: var(--oceano-escuro); margin: 18px 0 8px; font-size: 20px; }
.lesson-body h4 { color: var(--oceano); margin: 14px 0 6px; font-size: 16px; }
.lesson-body p { margin-bottom: 10px; }
.lesson-body strong { color: var(--oceano-escuro); }
.lesson-body .inline {
  background: var(--areia-escura);
  border-radius: 6px;
  padding: 1px 6px;
  font-family: Consolas, monospace;
  font-size: 0.92em;
  color: #0a4a52;
}
.lesson-body ul, .lesson-body ol { margin: 8px 0 12px 22px; }
.lesson-body li { margin-bottom: 4px; }

.lesson-body .callout {
  background: #e5f6f4;
  border-left: 5px solid var(--turquesa);
  border-radius: 0 10px 10px 0;
  padding: 12px 16px;
  margin: 12px 0;
}
.lesson-body .callout p { margin-bottom: 0; }

.lesson-body .dialogo {
  background: #1f2d33;
  color: #eaf6f5;
  border-radius: 10px;
  padding: 16px 20px;
  font-family: Consolas, monospace;
  white-space: pre-wrap;
  margin: 12px 0;
  font-size: 14.5px;
}

.lesson-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 16px;
  font-size: 15px;
}
.lesson-body th, .lesson-body td {
  border: 1px solid var(--areia-escura);
  padding: 8px 12px;
  text-align: left;
}
.lesson-body th { background: var(--oceano); color: var(--branco); }
.lesson-body tr:nth-child(even) { background: var(--areia); }

.pagination { display: flex; justify-content: space-between; gap: 12px; margin-top: 20px; }

/* ---------- Flashcards ---------- */
.fc-setup { max-width: 640px; margin: 0 auto; }

.flashcard-box { perspective: 1200px; max-width: 620px; margin: 24px auto; }
.flashcard {
  background: var(--branco);
  border-radius: 18px;
  box-shadow: var(--sombra);
  min-height: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s;
}
.flashcard:hover { transform: translateY(-3px); }
.flashcard .front { font-size: 34px; font-weight: 800; color: var(--oceano-escuro); }
.flashcard .front-cat { font-size: 13px; color: var(--texto-suave); margin-top: 8px; }
.flashcard .back { font-size: 26px; font-weight: 700; color: var(--coral); }
.flashcard .back-cat { font-size: 13px; color: var(--texto-suave); margin-top: 6px; }
.flashcard .hint { font-size: 13px; color: var(--texto-suave); margin-top: 18px; }

.fc-acoes { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.fc-acoes .btn { min-width: 110px; }
.rating-de-novo { background: #b0554f; }
.rating-dificil { background: #d98a3d; }
.rating-bom { background: var(--oceano); }
.rating-facil { background: var(--turquesa); }

.fc-progresso { text-align: center; color: var(--texto-suave); margin-bottom: 8px; font-size: 14px; }

/* ---------- Quiz ---------- */
.quiz-setup { max-width: 640px; margin: 0 auto; }

.quiz-pergunta { text-align: center; margin-bottom: 20px; }
.quiz-pergunta .prompt { font-size: 30px; font-weight: 800; color: var(--oceano-escuro); }
.quiz-pergunta .prompt-dir { font-size: 13px; color: var(--texto-suave); margin-top: 4px; }

.quiz-opcoes { display: grid; gap: 10px; max-width: 560px; margin: 0 auto 18px; }
.quiz-opcao {
  background: var(--branco);
  border: 2px solid var(--areia-escura);
  border-radius: 10px;
  padding: 12px 16px;
  font: inherit;
  font-size: 17px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.1s, background 0.1s;
}
.quiz-opcao:hover { border-color: var(--oceano); }
.quiz-opcao.certo { background: #d7f0dc; border-color: #2e9e4f; font-weight: 700; }
.quiz-opcao.errado { background: #fbdcd8; border-color: #c2453a; }
.quiz-opcao:disabled { cursor: default; }

.quiz-digite { display: flex; gap: 10px; justify-content: center; margin-bottom: 16px; }
.quiz-digite input { font-size: 18px; min-width: 280px; text-align: center; }

.quiz-feedback { text-align: center; font-size: 18px; margin-bottom: 16px; min-height: 28px; font-weight: 600; }
.quiz-feedback.certo { color: #2e9e4f; }
.quiz-feedback.errado { color: #c2453a; }

.quiz-cabecalho { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; color: var(--texto-suave); font-size: 14px; }

.quiz-resultado { text-align: center; padding: 30px; }
.quiz-resultado .score { font-size: 60px; font-weight: 800; color: var(--oceano); }
.quiz-resultado .score-label { color: var(--texto-suave); margin-bottom: 20px; }

/* ---------- Vocabulário ---------- */
.voc-busca { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.voc-busca input { flex: 1; min-width: 200px; }

.voc-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.voc-table th, .voc-table td { padding: 9px 12px; border-bottom: 1px solid var(--areia-escura); text-align: left; }
.voc-table th { position: sticky; top: 0; background: var(--areia); }
.voc-table tr:hover { background: var(--areia); }
.cat-pill { background: var(--areia-escura); color: var(--oceano-escuro); border-radius: 999px; padding: 2px 10px; font-size: 12px; font-weight: 600; white-space: nowrap; }

/* ---------- Botão voltar no topo de cards ---------- */
.topbar { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.topbar .btn { padding: 6px 12px; }

/* ---------- Responsivo ---------- */
@media (max-width: 820px) {
  #app { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    padding: 16px;
  }
  .brand { margin-bottom: 12px; }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .nav-item { flex: 1; text-align: center; padding: 10px 6px; font-size: 14px; }
  .sidebar-footer { display: none; }
  .content { padding: 20px 16px; }
  .hero { padding: 24px; }
  .flashcard .front { font-size: 26px; }
  .quiz-digite input { min-width: 200px; }
}

.tema-note { margin-top: 18px; padding: 12px; background: var(--areia); border-radius: 10px; font-size: 13px; color: var(--texto-suave); }