:root {
  --bg-page: #f4f6fb;
  --bg-card: #ffffff;
  --bg-subtle: #eef2f9;
  --bg-code: #f8fafc;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;
  --primary-border: #bfdbfe;

  --success: #059669;
  --success-hover: #047857;
  --success-soft: #ecfdf5;
  --success-border: #a7f3d0;

  --warning: #d97706;
  --warning-soft: #fffbeb;
  --warning-border: #fde68a;

  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --danger-border: #fecaca;

  --purple: #7c3aed;
  --purple-soft: #f5f3ff;
  --purple-border: #ddd6fe;

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 14px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --reader-scale: 1;
}

body.dark-theme {
  --bg-page: #0b1120;
  --bg-card: #151f32;
  --bg-subtle: #1e293b;
  --bg-code: #0f172a;
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #263349;
  --border-strong: #334155;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-soft: rgba(59, 130, 246, 0.14);
  --primary-border: rgba(59, 130, 246, 0.35);

  --success: #10b981;
  --success-hover: #34d399;
  --success-soft: rgba(16, 185, 129, 0.14);
  --success-border: rgba(16, 185, 129, 0.35);

  --warning: #f59e0b;
  --warning-soft: rgba(245, 158, 11, 0.14);
  --warning-border: rgba(245, 158, 11, 0.35);

  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.14);
  --danger-border: rgba(239, 68, 68, 0.35);

  --purple: #8b5cf6;
  --purple-soft: rgba(139, 92, 246, 0.15);
  --purple-border: rgba(139, 92, 246, 0.35);

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 40px rgba(0, 0, 0, 0.55);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.55;
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

.hidden {
  display: none !important;
}

/* ==================== HEADER ==================== */
.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  user-select: none;
}

.brand-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.header-date-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-success {
  background: var(--success);
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(5, 150, 105, 0.25);
}

.btn-success:hover {
  background: var(--success-hover);
}

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--border-strong);
  background: var(--border-color);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.btn-ghost:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: var(--danger-border);
}

.btn-danger:hover {
  background: var(--danger);
  color: #ffffff;
}

.btn-teacher {
  background: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
}

.btn-teacher:hover,
.btn-teacher.active-mode {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: var(--primary-border);
}

.btn-icon {
  padding: 9px 12px;
}

.btn-lg {
  padding: 12px 22px;
  font-size: 0.98rem;
  border-radius: 10px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.82rem;
}

.btn-xs {
  padding: 4px 10px;
  font-size: 0.76rem;
  border-radius: 6px;
}

/* ==================== MAIN CONTENT ==================== */
.main-content {
  padding-top: 26px;
  padding-bottom: 64px;
}

/* ==================== INTRO & SEARCH BAR ==================== */
.portal-intro-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.portal-intro-text p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  max-width: 600px;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 280px;
  max-width: 440px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 11px 38px 11px 42px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.clear-search-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px;
}

/* ==================== FEATURED HERO CARD (ATIVIDADE DO DIA / TOPO) ==================== */
.featured-hero-container {
  margin-bottom: 30px;
}

.featured-section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 10px;
}

.featured-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.hero-card {
  background: var(--bg-card);
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, #2563eb, #7c3aed);
}

.hero-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.badges-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}

.badge-featured {
  background: linear-gradient(135deg, #f59e0b, #ea580c);
  color: #ffffff;
}

.badge-code {
  background: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
  font-family: 'JetBrains Mono', monospace;
}

.badge-aula {
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.badge-atividade {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.badge-avaliacao {
  background: var(--purple-soft);
  color: var(--purple);
  border: 1px solid var(--purple-border);
}

.badge-mode-folha {
  background: var(--warning-soft);
  color: var(--warning);
  border: 1px solid var(--warning-border);
}

.badge-mode-site {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.hero-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  cursor: pointer;
}

.hero-title:hover {
  color: var(--primary);
}

.hero-summary {
  font-size: 1rem;
  color: var(--text-secondary);
}

.hero-preview-box {
  background: var(--bg-code);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  max-height: 92px;
  overflow: hidden;
  position: relative;
}

.hero-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 6px;
}

.hero-meta-info {
  font-size: 0.84rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ==================== FILTER TABS & FEED ==================== */
.feed-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.filter-pills {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-pill,
.admin-filter-pill {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.filter-pill:hover,
.admin-filter-pill:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-pill.active,
.admin-filter-pill.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.pill-count {
  font-size: 0.74rem;
  padding: 1px 7px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
}

.filter-pill.active .pill-count {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.feed-sort-info {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==================== ACTIVITIES BLOG GRID ==================== */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.activity-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.activity-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.activity-card.is-featured-card {
  border-color: var(--primary);
  background: linear-gradient(180deg, var(--primary-soft) 0%, var(--bg-card) 90px);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 8px;
  line-height: 1.35;
  cursor: pointer;
}

.card-title:hover {
  color: var(--primary);
}

.card-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.card-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==================== STUDENT READER VIEW ==================== */
.reader-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.reader-font-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.font-control-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-right: 4px;
}

.reader-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

.reader-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.reader-title {
  font-size: calc(1.75rem * var(--reader-scale));
  font-weight: 800;
  margin: 12px 0 8px;
  line-height: 1.25;
}

.reader-meta {
  font-size: 0.86rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.mode-callout {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: calc(0.96rem * var(--reader-scale));
}

.mode-callout.folha {
  background: var(--warning-soft);
  border: 1px solid var(--warning-border);
  color: var(--text-main);
}

.mode-callout.site {
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  color: var(--text-main);
}

.mode-callout-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.reader-section {
  margin-bottom: 28px;
}

.reader-section-title {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
}

.instructions-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.instruction-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--bg-subtle);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  font-size: calc(0.98rem * var(--reader-scale));
  transition: all 0.15s ease;
}

.instruction-item:hover {
  border-color: var(--primary-border);
}

.instruction-item.done {
  opacity: 0.65;
  text-decoration: line-through;
  background: var(--success-soft);
  border-color: var(--success-border);
}

.instruction-item input[type="checkbox"] {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  accent-color: var(--success);
  cursor: pointer;
  flex-shrink: 0;
}

/* Copyable Text Block Box */
.copy-blocks-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.copy-block-card {
  border: 2px solid var(--primary-border);
  border-radius: var(--radius-md);
  background: var(--bg-code);
  overflow: hidden;
}

.copy-block-header {
  background: var(--primary-soft);
  padding: 14px 20px;
  border-bottom: 1px solid var(--primary-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.copy-block-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.copy-block-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
}

.copy-block-stats {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.copy-block-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-copy-big {
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 700;
}

.copy-block-content {
  padding: 22px 24px;
  font-size: calc(1.04rem * var(--reader-scale));
  line-height: 1.75;
  color: var(--text-main);
  white-space: pre-wrap;
  word-break: break-word;
  user-select: text;
  font-family: 'Inter', Georgia, serif;
}

/* Reader Optional Image */
.reader-image-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.reader-image-box img {
  max-width: 100%;
  max-height: 520px;
  border-radius: var(--radius-sm);
  cursor: zoom-in;
  box-shadow: var(--shadow-sm);
}

.reader-image-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ==================== TEACHER ADMIN PANEL ==================== */
.admin-header-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-sm);
}

.admin-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 6px;
}

.admin-header-info h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.admin-header-info p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  max-width: 650px;
}

.admin-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.stat-value {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-main);
}

.stat-released {
  border-left: 4px solid var(--success);
}

.stat-hidden {
  border-left: 4px solid var(--text-muted);
}

.stat-featured {
  border-left: 4px solid var(--warning);
}

.admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.admin-search-box input {
  padding-left: 16px;
}

.admin-activities-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.admin-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.15s;
}

.admin-item-card.is-hidden-act {
  border-left: 5px solid var(--text-muted);
  background: var(--bg-subtle);
}

.admin-item-card.is-released-act {
  border-left: 5px solid var(--success);
}

.admin-item-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.admin-item-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 6px;
  color: var(--text-main);
}

.admin-item-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.admin-release-switch-box {
  display: flex;
  align-items: center;
  gap: 10px;
}

.admin-item-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.admin-top-schedule-quick {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.inline-date-input {
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.8rem;
  font-family: inherit;
}

.admin-item-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* ==================== MODALS & FORMS ==================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(3px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-sm {
  max-width: 420px;
}

.modal-md {
  max-width: 560px;
}

.modal-xl {
  max-width: 880px;
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.18rem;
  font-weight: 800;
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}

.modal-close-btn:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

.modal-body {
  padding: 22px 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-helper {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.modal-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.form-row {
  display: grid;
  gap: 14px;
}

.form-row-2 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.form-row-3 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-control {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.94rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.pin-input {
  font-size: 1.4rem;
  text-align: center;
  letter-spacing: 0.25em;
  font-weight: 700;
}

.form-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.form-section-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.highlight-rules-box {
  border-color: var(--warning-border);
  background: var(--warning-soft);
}

.form-section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.form-section-header h4 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.form-section-header p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.date-preset-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.checkbox-group-centered {
  justify-content: flex-end;
}

.checkbox-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 600;
}

.checkbox-card input {
  width: 17px;
  height: 17px;
  accent-color: var(--primary);
}

.text-blocks-editor {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.text-block-editor-item {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.text-block-editor-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.text-block-editor-top input {
  flex: 1;
}

.image-preview-wrapper {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 8px;
}

.image-preview-wrapper img {
  max-height: 110px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
}

.release-status-box {
  background: var(--success-soft);
  border-color: var(--success-border);
}

.release-toggle-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.release-toggle-label input {
  width: 20px;
  height: 20px;
  accent-color: var(--success);
}

.release-toggle-text {
  display: flex;
  flex-direction: column;
}

.release-toggle-text span {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ==================== EMPTY STATE & ALERTS ==================== */
.empty-state {
  background: var(--bg-card);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 48px 24px;
  text-align: center;
  grid-column: 1 / -1;
}

.empty-state h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 600;
}

.alert-error {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}

/* ==================== LIGHTBOX ==================== */
.lightbox-container {
  position: relative;
  max-width: 92vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.lightbox-close {
  background: #ffffff;
  color: #0f172a;
  border: none;
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
}

.lightbox-container img {
  max-width: 92vw;
  max-height: 82vh;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* ==================== TOAST ==================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: #0f172a;
  color: #ffffff;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 0.92rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.2s ease-out;
  border-left: 4px solid var(--success);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 12px 0;
  }

  .hero-card {
    padding: 20px;
  }

  .hero-title {
    font-size: 1.25rem;
  }

  .reader-card {
    padding: 20px;
  }

  .activities-grid {
    grid-template-columns: 1fr;
  }
}

/* ==================== SITE FOOTER (ECODE CLEAN) ==================== */
body {
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  width: 100%;
}

.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 22px 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.ecode-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 12px;
  border-radius: 8px;
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.footer-dev-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-dev-text strong {
  color: var(--text-main);
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==================== NEW FEATURES: AMBAS, PDF, INLINE IMAGES, PROMPT ==================== */
.badge-ambas {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.14), rgba(5, 150, 105, 0.14));
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.badge-week {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.combo-input-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pdf-upload-box {
  margin-top: 8px;
  padding: 14px;
  background: var(--bg-card);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
}

.pdf-preview-status {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--success-soft);
  border: 1px solid var(--success-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--success);
}

.pdf-download-banner {
  background: linear-gradient(135deg, var(--primary-soft), var(--bg-subtle));
  border: 2px solid var(--primary-border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.pdf-download-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.pdf-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #dc2626;
  color: #ffffff;
  font-weight: 800;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-prompt-card {
  background: var(--success-soft);
  border: 2px solid var(--success-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin-top: 24px;
}

.activity-prompt-title {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--success);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.activity-prompt-body {
  font-size: calc(1.02rem * var(--reader-scale));
  color: var(--text-main);
  white-space: pre-wrap;
  line-height: 1.7;
}

/* Inline Positioned Images inside Text Blocks */
.inline-block-image-wrap {
  margin: 14px 0;
  display: flex;
  flex-direction: column;
}

.inline-block-image-wrap.align-left {
  align-items: flex-start;
}

.inline-block-image-wrap.align-center {
  align-items: center;
}

.inline-block-image-wrap.align-right {
  align-items: flex-end;
}

.inline-block-image-wrap img {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
  height: auto;
}

.inline-block-image-wrap.size-small img {
  max-width: 320px;
  width: 100%;
}

.inline-block-image-wrap.size-medium img {
  max-width: 580px;
  width: 100%;
}

.inline-block-image-wrap.size-large img {
  max-width: 100%;
  width: 100%;
}

.tb-image-controls {
  background: var(--bg-subtle);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tb-order-btns {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==================== USER PROFILE HEADER DROPDOWN & PASSWORD FIELD ==================== */
.user-profile-menu-wrap {
  position: relative;
  display: inline-flex;
}

.user-profile-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 8px;
  border-radius: 999px;
  border: 1.5px solid var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.user-profile-btn:hover {
  background: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.user-avatar-circle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  flex-shrink: 0;
}

.user-profile-btn:hover .user-avatar-circle {
  background: #ffffff;
  color: var(--primary);
}

.user-caret {
  font-size: 0.78rem;
  opacity: 0.85;
}

.user-dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 250px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  z-index: 250;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.user-dropdown-header {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.user-dropdown-header strong {
  font-size: 0.94rem;
  color: var(--text-main);
}

.user-dropdown-header span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.user-dropdown-item {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}

.user-dropdown-item:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.user-dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

.user-dropdown-logout {
  color: var(--danger);
}

.user-dropdown-logout:hover {
  background: var(--danger-soft);
  color: var(--danger);
}

.password-field-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.password-field-wrap .form-control {
  width: 100%;
  padding-right: 42px;
}

.password-field-wrap .pin-input {
  font-size: 1.05rem;
  text-align: left;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.toggle-password-btn {
  position: absolute;
  right: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: 4px 6px;
  border-radius: 6px;
  opacity: 0.7;
  transition: opacity 0.15s ease, background 0.15s ease;
}

.toggle-password-btn:hover {
  opacity: 1;
  background: var(--bg-subtle);
}

/* ==================== CRITÉRIOS DA ATIVIDADE & INTRODUÇÃO DO BLOCO ==================== */
.criteria-enable-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
}

.criteria-enable-toggle input[type="checkbox"] {
  width: 17px;
  height: 17px;
  accent-color: var(--primary);
  cursor: pointer;
}

.criteria-builder-wrapper {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-strong);
}

.criteria-list-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.criterion-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}

.criterion-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}

.criterion-row .form-control {
  flex: 1;
}

.criteria-builder-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.criteria-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.criteria-progress-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
}

.criterion-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  margin-right: 6px;
  flex-shrink: 0;
}

.instruction-item.done .criterion-tag {
  background: var(--success-soft);
  color: var(--success);
}

.copy-block-intro {
  padding: 12px 18px;
  background: var(--primary-soft);
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 0.94rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.tb-copy-toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  cursor: pointer;
  user-select: none;
}

.tb-copy-toggle-label input[type="checkbox"] {
  accent-color: var(--primary);
  cursor: pointer;
}