/* ── Study bar ───────────────────────────────── */
#study-reveal-count {
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

#study-bar button {
  height: 28px;
  padding: 0 12px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
  white-space: nowrap;
}

#study-bar button:hover:not(:disabled) {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

#study-bar button:disabled { opacity: 0.3; cursor: not-allowed; }

#btn-highlight-flow {
  border-color: rgba(250,204,21,0.3) !important;
  color: #facc15 !important;
}

#btn-highlight-flow:hover:not(:disabled) {
  background: rgba(250,204,21,0.08) !important;
}

#btn-clear-flow {
  border-color: rgba(249,115,22,0.3) !important;
  color: #f97316 !important;
}

/* ── Quiz overlay ────────────────────────────── */
#quiz-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  backdrop-filter: blur(6px);
  animation: fadeIn 0.18s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

#quiz-modal {
  width: 560px;
  max-width: 95vw;
  max-height: 90vh;
  background: #111111;
  border: 1px solid var(--border-medium);
  border-radius: 14px;
  box-shadow: var(--shadow-modal);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.22s ease;
}

@keyframes slideUp {
  from { transform: translateY(14px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

/* ── Quiz header ─────────────────────────────── */
#quiz-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

#quiz-meta { flex: 1; display: flex; flex-direction: column; gap: 6px; }

#quiz-progress-label { font-size: 11px; color: var(--text-muted); font-weight: 600; }

#quiz-progress-bar {
  height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  overflow: hidden;
}

#quiz-progress-fill {
  height: 100%;
  background: #ffffff;
  border-radius: 2px;
  transition: width 0.3s ease;
}

#quiz-score-display {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  flex-shrink: 0;
}

#quiz-score-label { font-size: 9px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
#quiz-score-value { font-size: 16px; font-weight: 700; color: var(--text-primary); font-family: var(--font-mono); }

#quiz-exit-btn {
  width: 28px;
  height: 28px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--t-fast), color var(--t-fast);
}

#quiz-exit-btn:hover { background: var(--accent-bg); color: var(--text-primary); }

/* ── WIP area ────────────────────────────────── */
#quiz-wip-area {
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

#quiz-wip-icon { font-size: 48px; }

#quiz-wip-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

#quiz-wip-msg {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 340px;
}

/* ── Question area ───────────────────────────── */
#quiz-question-area {
  padding: 24px 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

#quiz-process-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  align-self: flex-start;
}

#quiz-question-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
}

/* ── Options ─────────────────────────────────── */
#quiz-options-grid { display: flex; flex-direction: column; gap: 7px; }

.quiz-option {
  padding: 11px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: rgba(255,255,255,0.03);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
  display: flex;
  align-items: center;
  gap: 10px;
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: rgba(255,255,255,0.07);
  color: var(--text-primary);
}

.quiz-option:disabled { cursor: default; }

.quiz-option__letter {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  flex-shrink: 0;
  color: var(--text-muted);
}

.quiz-option.is-correct {
  border-color: var(--color-upstream);
  background: rgba(34,197,94,0.1);
  color: var(--color-upstream);
}

.quiz-option.is-correct .quiz-option__letter {
  border-color: var(--color-upstream);
  background: rgba(34,197,94,0.15);
  color: var(--color-upstream);
}

.quiz-option.is-wrong {
  border-color: #ef4444;
  background: rgba(239,68,68,0.08);
  color: #ef4444;
}

.quiz-option.is-wrong .quiz-option__letter {
  border-color: #ef4444;
  background: rgba(239,68,68,0.12);
  color: #ef4444;
}

/* ── Feedback ────────────────────────────────── */
#quiz-feedback {
  padding: 11px 14px;
  border-radius: 7px;
  font-size: 13px;
  line-height: 1.5;
}

#quiz-feedback.correct {
  background: rgba(34,197,94,0.08);
  border: 1px solid rgba(34,197,94,0.25);
  color: var(--color-upstream);
}

#quiz-feedback.wrong {
  background: rgba(239,68,68,0.07);
  border: 1px solid rgba(239,68,68,0.22);
  color: #f87171;
}

#quiz-next-btn {
  align-self: flex-end;
  padding: 9px 20px;
  background: #ffffff;
  border: none;
  border-radius: 7px;
  color: #000000;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--t-fast);
}

#quiz-next-btn:hover { background: #e0e0e0; }

/* ── Result ──────────────────────────────────── */
#quiz-result-area {
  padding: 36px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

#quiz-result-icon { font-size: 44px; }
#quiz-result-title { font-size: 20px; font-weight: 700; color: var(--text-primary); }
#quiz-result-score { font-size: 34px; font-weight: 800; font-family: var(--font-mono); color: #ffffff; }
#quiz-result-message { font-size: 14px; color: var(--text-secondary); line-height: 1.5; max-width: 360px; }

.quiz-result-actions { display: flex; gap: 10px; margin-top: 8px; }

.quiz-result-actions button {
  padding: 10px 24px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
}

#quiz-restart-btn { background: #ffffff; border: none; color: #000000; }
#quiz-restart-btn:hover { background: #e0e0e0; }

#quiz-finish-btn {
  background: transparent;
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
}

#quiz-finish-btn:hover { background: var(--accent-bg); color: var(--text-primary); }

/* ── Princípios painel flutuante ─────────────── */
#principles-panel {
  position: fixed;
  top: 80px;
  left: 244px; /* 12px offset + 220px menu + 12px gap */
  width: 800px;
  max-height: calc(100vh - 100px);
  background: rgba(17,17,17,0.97);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.40);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 79; /* abaixo do menu flutuante (z-index 80) */
  animation: slideInLeft 0.18s ease;
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}

#principles-header {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

#principles-header h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

#principles-close-btn {
  width: 28px;
  height: 28px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--t-fast), color var(--t-fast);
}

#principles-close-btn:hover { background: var(--accent-bg); color: var(--text-primary); }

#principles-content {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.principles-group__title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.principles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.principle-card {
  padding: 16px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: rgba(255,255,255,0.03);
}

.principle-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.principle-card__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}