/* ==========================================================================
   Estilo Base - Aulas Interativas de História (6º Ano)
   Inspirado no design editorial Tufte & Material Didático Moderno
   ========================================================================== */

:root {
  --bg-main: #fbfbf9;
  --bg-card: #ffffff;
  --bg-accent: #f0f4f8;
  --text-main: #1d2129;
  --text-muted: #5c6370;
  --primary: #8a3b14; /* Tom terracota / grego antigo / clássico */
  --primary-light: #fbeee8;
  --secondary: #1e3a5f; /* Azul medieval / mar profundo */
  --secondary-light: #e8f0fe;
  --accent: #2c7a4b;
  --accent-light: #eaf6ee;
  --danger: #b91c1c;
  --danger-light: #fee2e2;
  --border: #e2e4e8;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --radius: 8px;
  --radius-lg: 12px;
  --font-serif: "ETBembo", "Palatino Linotype", "Palatino", "Georgia", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.65;
  padding: 2.5rem 1.25rem 4rem;
  max-width: 820px;
  margin: 0 auto;
}

/* Header & Nav */
header.course-header {
  border-bottom: 2px solid var(--primary);
  padding-bottom: 1.5rem;
  margin-bottom: 2.5rem;
}

.course-meta {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

h1.lesson-title {
  font-size: 2.3rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.lesson-subtitle {
  font-family: var(--font-sans);
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Breadcrumbs / Quick Nav */
.lesson-nav {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.lesson-nav a {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  text-decoration: none;
  background: var(--bg-accent);
  color: var(--secondary);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.lesson-nav a:hover {
  background: var(--secondary);
  color: #fff;
}

/* Content Headings */
h2 {
  font-size: 1.65rem;
  color: var(--primary);
  margin: 2.5rem 0 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}

h3 {
  font-size: 1.3rem;
  color: var(--secondary);
  margin: 1.75rem 0 0.75rem;
}

p {
  margin-bottom: 1.25rem;
}

strong {
  color: #111;
}

/* Cards & Callouts */
.callout {
  background: var(--bg-card);
  border-left: 4px solid var(--primary);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
}

.callout.secondary {
  border-left-color: var(--secondary);
  background: var(--secondary-light);
}

.callout.highlight {
  border-left-color: var(--accent);
  background: var(--accent-light);
}

.callout-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.callout.secondary .callout-title {
  color: var(--secondary);
}

.callout.highlight .callout-title {
  color: var(--accent);
}

/* Visual Schemes / Flowcards */
.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin: 1.75rem 0;
}

.concept-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.concept-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.concept-card h4 {
  font-family: var(--font-sans);
  color: var(--primary);
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-light);
  padding-bottom: 0.25rem;
}

.concept-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Table styles */
table.reference-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--bg-card);
  font-size: 0.98rem;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

table.reference-table th,
table.reference-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.reference-table th {
  background-color: var(--secondary);
  color: #fff;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
}

table.reference-table tr:last-child td {
  border-bottom: none;
}

table.reference-table tr:hover {
  background-color: var(--primary-light);
}

/* Primary Source Box */
.primary-source {
  background: #fdfaf6;
  border: 1px solid #ebd0c2;
  border-radius: var(--radius);
  padding: 1.25rem;
  margin: 2rem 0;
  font-size: 0.95rem;
}

.primary-source .label {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

/* Interactive Quiz Widget */
.quiz-section {
  background: var(--bg-card);
  border: 2px solid var(--secondary);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-lg);
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--secondary-light);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.quiz-title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--secondary);
}

.quiz-score {
  font-family: var(--font-sans);
  font-weight: bold;
  font-size: 0.95rem;
  background: var(--secondary-light);
  color: var(--secondary);
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
}

.quiz-question {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px dashed var(--border);
}

.quiz-question:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.quiz-q-text {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.85rem;
  color: var(--text-main);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.quiz-option {
  background: var(--bg-main);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  text-align: left;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.quiz-option:hover:not([disabled]) {
  background: var(--secondary-light);
  border-color: var(--secondary);
}

.quiz-option.correct {
  background: var(--accent-light) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  font-weight: 600;
}

.quiz-option.incorrect {
  background: var(--danger-light) !important;
  border-color: var(--danger) !important;
  color: var(--danger) !important;
}

.quiz-feedback {
  margin-top: 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius);
  display: none;
  line-height: 1.45;
}

.quiz-feedback.show-correct {
  display: block;
  background: var(--accent-light);
  color: #1e5c36;
  border: 1px solid #c2e5d1;
}

.quiz-feedback.show-incorrect {
  display: block;
  background: var(--danger-light);
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* Footer & Agent Prompts */
footer.lesson-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.agent-help-prompt {
  background: #fdfaf3;
  border: 1px solid #f2e3be;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 2.5rem 0;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.agent-help-prompt .icon {
  font-size: 1.8rem;
  line-height: 1;
}

.agent-help-prompt p {
  margin: 0;
  font-size: 0.95rem;
}

/* Print Friendly */
@media print {
  body {
    max-width: 100%;
    padding: 0;
    color: #000;
  }
  .quiz-section, .agent-help-prompt, .lesson-nav {
    display: none;
  }
  .callout, .concept-card {
    border: 1px solid #ccc;
    box-shadow: none;
  }
}