/* ===== Quiz Section ===== */
.quiz-tag-bar { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 0.85rem; }
.tag-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; font-weight: 400;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 140ms ease;
}
.tag-chip:hover { border-color: var(--accent); color: var(--text); }
.tag-chip.active { border-color: var(--accent); color: var(--text); background: var(--accent-bg); }

.quiz-stats {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1.15rem;
  margin-bottom: 0.85rem;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 0.65rem;
}
.stat-item { text-align: center; flex: 1; }
.stat-num {
  font-family: Georgia, serif;
  font-size: 1.65rem; font-weight: 400;
  color: var(--text); line-height: 1;
}
.stat-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem; color: var(--muted);
  margin-top: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.quiz-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.85rem; }

/* Question card */
.q-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: clamp(0.85rem, 1.4vw, 1.15rem) 1.25rem;
  margin-bottom: 0.85rem;
}
.q-meta {
  display: flex; align-items: center; gap: 0.45rem;
  margin-bottom: 0.65rem; flex-wrap: wrap;
}
.q-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; color: var(--accent);
  font-weight: 400;
}
.q-progress {
  flex: 1; height: 3px; background: var(--border);
  border-radius: 999px; overflow: hidden;
}
.q-progress-fill { height: 100%; background: var(--accent); border-radius: 999px; transition: width 300ms ease; }
.q-text {
  font-size: 1rem; line-height: 1.55;
  color: var(--text); margin-bottom: 0.85rem;
  font-weight: 450;
}
.opts { display: flex; flex-direction: column; gap: 0.4rem; }
.opt {
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.96rem; line-height: 1.55;
  color: var(--text-body);
  transition: all 140ms cubic-bezier(0.22, 1, 0.36, 1);
  display: flex; gap: 0.55rem; align-items: flex-start;
}
.opt:hover { border-color: var(--accent); }
.opt.selected { border-color: var(--accent); background: var(--accent-bg); color: var(--text); }
.opt.correct { border-color: var(--success); background: var(--success-bg); color: var(--text); }
.opt.wrong { border-color: var(--error); background: var(--error-bg); color: var(--text); }
.opt-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; font-weight: 400;
  color: var(--muted);
  min-width: 1.2rem; flex-shrink: 0;
}
.opt.selected .opt-label { color: var(--accent); }
.opt.correct .opt-label { color: var(--success); }
.opt.wrong .opt-label { color: var(--error); }

.explain-box {
  margin-top: 0.85rem;
  padding: 0.65rem 0.9rem;
  background: var(--success-bg);
  border-left: 2px solid var(--success);
  border-radius: 0 4px 4px 0;
}
.explain-box .exp-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem; font-weight: 400;
  color: var(--success);
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.explain-box p { font-size: 0.82rem; line-height: 1.55; }

.q-nav {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 1rem; flex-wrap: wrap; gap: 0.5rem;
}

/* Result card */
.result-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem 1.5rem;
  text-align: center;
}
.result-score {
  font-family: Georgia, serif;
  font-size: clamp(3rem, 8vw, 4.5rem);
  font-weight: 400; color: var(--text);
  line-height: 1;
}
.result-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem; color: var(--muted);
  margin-top: 0.35rem;
}
.result-breakdown {
  display: flex; justify-content: center; gap: 2rem;
  margin-top: 1.25rem;
}
.bd-item .bd-num {
  font-family: Georgia, serif;
  font-size: 1.4rem; font-weight: 400; line-height: 1;
}
.bd-item .bd-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem; color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.bd-correct .bd-num { color: var(--success); }
.bd-wrong .bd-num { color: var(--error); }
.bd-skip .bd-num { color: var(--warning); }