/* =====================================================
   DPBT MASTER – Exam Mode Styles
   ===================================================== */

/* ---- Exam question navigation ---- */
.exam-nav-section {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.9rem 1rem;
  margin-bottom: 1.2rem;
}
.exam-nav-title {
  font-size: 0.72rem; font-weight: 700; color: var(--text3);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.6rem;
}
.exam-question-dots {
  display: flex; flex-wrap: wrap; gap: 0.35rem;
}
.exam-dot {
  width: 28px; height: 28px; border-radius: 6px;
  border: 1.5px solid var(--border);
  background: var(--glass);
  font-size: 0.68rem; font-weight: 700; color: var(--text3);
  cursor: pointer; transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.exam-dot:hover { border-color: var(--cyan); color: var(--text); }
.exam-dot.current { border-color: var(--purple); background: rgba(124,58,237,0.2); color: var(--purple-l); }
.exam-dot.answered { border-color: var(--cyan); background: rgba(6,182,212,0.12); color: var(--cyan-l); }

/* Exam legend */
.exam-legend {
  display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 0.6rem;
  font-size: 0.7rem; color: var(--text2);
}
.legend-item { display: flex; align-items: center; gap: 0.3rem; }
.legend-dot { width: 10px; height: 10px; border-radius: 3px; }
.legend-dot--current  { background: rgba(124,58,237,0.5); border: 1px solid var(--purple); }
.legend-dot--answered { background: rgba(6,182,212,0.3); border: 1px solid var(--cyan); }
.legend-dot--empty    { background: var(--glass); border: 1px solid var(--border); }

/* Exam question navigation buttons */
.exam-nav-buttons {
  display: flex; gap: 0.6rem; margin-top: 1.2rem;
}
.exam-nav-btn {
  background: var(--glass); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius-s);
  padding: 0.6rem 1rem; font-size: 0.85rem; font-weight: 600;
  transition: var(--transition); flex: 1;
}
.exam-nav-btn:hover { border-color: var(--purple); background: rgba(124,58,237,0.1); }
.exam-nav-btn:disabled { opacity: 0.4; cursor: default; }

/* Submit button */
.btn-exam-submit {
  background: var(--grad-green);
  color: #fff; border-radius: var(--radius);
  padding: 0.9rem 2rem; font-weight: 700; font-size: 1rem;
  transition: var(--transition); box-shadow: 0 4px 16px rgba(16,185,129,0.3);
}
.btn-exam-submit:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(16,185,129,0.5); }

/* Exam header info bar */
.exam-info-bar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.7rem 1.1rem;
  margin-bottom: 1rem; flex-wrap: wrap; gap: 0.6rem;
}
.exam-info-item { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; }
.exam-info-label { color: var(--text2); font-size: 0.75rem; }
.exam-info-val   { font-weight: 700; color: var(--text); }
.exam-info-time  { font-weight: 700; color: var(--yellow); font-size: 1rem; }
.exam-info-time.urgent { color: var(--red); animation: pulse-red 1s infinite; }

/* ---- Results Screen ---- */
.results-grade-banner {
  padding: 1.2rem; border-radius: var(--radius-l); margin-bottom: 1.2rem;
  text-align: center;
}
.results-grade-banner.grade-a { background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.3); }
.results-grade-banner.grade-b { background: rgba(6,182,212,0.12); border: 1px solid rgba(6,182,212,0.3); }
.results-grade-banner.grade-c { background: rgba(245,158,11,0.12); border: 1px solid rgba(245,158,11,0.3); }
.results-grade-banner.grade-d { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); }
.results-grade-letter { font-size: 3.5rem; font-weight: 900; }
.results-grade-label  { font-size: 0.9rem; color: var(--text2); }

/* Topic breakdown bars */
.topic-breakdown {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius-l); padding: 1.4rem;
  margin-bottom: 1rem;
}
.topic-breakdown h3 {
  font-size: 0.85rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text2); margin-bottom: 1rem;
}
.breakdown-row {
  display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.7rem;
}
.breakdown-label { width: 120px; font-size: 0.8rem; color: var(--text2); flex-shrink: 0; }
.breakdown-bar { flex: 1; height: 8px; background: var(--bg3); border-radius: 4px; overflow: hidden; }
.breakdown-fill { height: 100%; border-radius: 4px; transition: width 0.7s ease; }
.breakdown-fill.good { background: var(--green); }
.breakdown-fill.ok   { background: var(--yellow); }
.breakdown-fill.bad  { background: var(--red); }
.breakdown-pct { width: 36px; text-align: right; font-size: 0.75rem; font-weight: 700; }
.breakdown-pct.good { color: var(--green-l); }
.breakdown-pct.ok   { color: var(--yellow-l); }
.breakdown-pct.bad  { color: var(--red-l); }

/* Exam review answers list */
.review-list { display: flex; flex-direction: column; gap: 0.6rem; }
.review-item {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.1rem;
}
.review-item.r-correct { border-color: rgba(16,185,129,0.3); }
.review-item.r-wrong   { border-color: rgba(239,68,68,0.3); }
.review-item-header {
  display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.5rem;
}
.review-q-num {
  width: 26px; height: 26px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem; font-weight: 700; flex-shrink: 0;
}
.r-correct .review-q-num { background: rgba(16,185,129,0.2); color: var(--green-l); border: 1px solid var(--green); }
.r-wrong   .review-q-num { background: rgba(239,68,68,0.15); color: var(--red-l); border: 1px solid var(--red); }
.review-q-text-head { font-size: 0.88rem; font-weight: 600; color: var(--text); }
.review-answers-row { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.8rem; }
.review-your-ans  { color: var(--text2); }
.review-your-ans .ans-val { color: var(--red-l); font-weight: 600; }
.review-your-ans.correct .ans-val { color: var(--green-l); }
.review-correct-ans .ans-val { color: var(--green-l); font-weight: 600; }
.review-explanation-text { font-size: 0.8rem; color: var(--text2); line-height: 1.5; margin-top: 0.5rem; padding-top: 0.5rem; border-top: 1px solid var(--border); }

/* Exam filter tabs */
.review-filter {
  display: flex; gap: 0.4rem; margin-bottom: 1rem; flex-wrap: wrap;
}
.filter-tab {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: 20px; padding: 0.35rem 0.9rem;
  font-size: 0.78rem; font-weight: 600; color: var(--text2);
  cursor: pointer; transition: var(--transition);
}
.filter-tab:hover { border-color: var(--purple); color: var(--text); }
.filter-tab.active { background: rgba(124,58,237,0.15); border-color: var(--purple); color: var(--purple-l); }
.filter-tab.f-wrong.active  { background: rgba(239,68,68,0.12); border-color: var(--red); color: var(--red-l); }
.filter-tab.f-correct.active { background: rgba(16,185,129,0.12); border-color: var(--green); color: var(--green-l); }