.exam-hub-shell {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.exam-hub-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 24px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(30, 41, 59, 0.92));
  border: 1px solid rgba(103, 232, 249, 0.18);
}

.exam-hub-header h2 {
  margin: 8px 0 6px;
  color: #f8fafc;
  font-size: 1.75rem;
}

.exam-hub-header p {
  margin: 0;
  color: #94a3b8;
  max-width: 720px;
  line-height: 1.55;
}

.exam-hub-kicker {
  color: #67e8f9;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.exam-hub-mode-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 14px;
  text-align: center;
}

.exam-hub-mode-tab {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 26px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: linear-gradient(160deg, rgba(10, 20, 54, 0.94) 0%, rgba(5, 11, 30, 0.94) 100%);
  color: #cbd5e1;
  font-weight: 800;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease, color 0.2s ease;
}

.exam-hub-mode-tab i {
  font-size: 1.2rem;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(148, 163, 184, 0.14);
  color: #94a3b8;
  transition: all 0.2s ease;
}

.exam-hub-mode-tab::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.14), transparent);
  transform: translateX(-130%);
  transition: transform 0.6s ease;
}

.exam-hub-mode-tab:hover::before { transform: translateX(130%); }

.exam-hub-mode-tab:hover {
  border-color: rgba(212, 175, 55, 0.45);
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(2, 6, 23, 0.5);
}

.exam-hub-mode-tab.active {
  border-color: #d4af37;
  background:
    radial-gradient(ellipse 90% 120% at 0% 0%, rgba(212, 175, 55, 0.22), transparent 60%),
    linear-gradient(160deg, #10204d 0%, #0a1436 100%);
  color: #ffe066;
  box-shadow: 0 16px 36px rgba(212, 175, 55, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}

.exam-hub-mode-tab.active:hover { transform: translateY(-4px); }

.exam-hub-mode-tab.active i {
  background: linear-gradient(135deg, #ffe066, #d4af37);
  color: #10142b;
  box-shadow: 0 6px 16px rgba(212, 175, 55, 0.4);
}

.exam-hub-mode-tab .mode-badge {
  margin-left: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.18);
  color: #cbd5e1;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.exam-hub-mode-tab.active .mode-badge {
  background: linear-gradient(135deg, #ffe066, #d4af37);
  color: #10142b;
}

@media (max-width: 640px) {
  .exam-hub-mode-tab { flex: 1 1 100%; justify-content: center; }
}


.exam-bilingual-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(212, 175, 55, 0.14);
  border: 1px solid rgba(212, 175, 55, 0.28);
  color: #fde68a;
  font-size: 0.72rem;
  font-weight: 800;
}

.exam-question-bilingual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.exam-option-bilingual-row {
  display: grid;
  grid-template-columns: 28px 1fr 1fr;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.exam-option-bilingual-row label.option-letter {
  color: #94a3b8;
  font-weight: 800;
  text-align: center;
}

.exam-lang-switch {
  display: inline-flex;
  gap: 8px;
  margin-top: 12px;
}

.exam-lang-switch button {
  border: 1px solid rgba(103, 232, 249, 0.24);
  background: rgba(15, 23, 42, 0.72);
  color: #cbd5e1;
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 700;
  cursor: pointer;
}

.exam-lang-switch button.active {
  background: rgba(34, 211, 238, 0.18);
  border-color: rgba(34, 211, 238, 0.42);
  color: #67e8f9;
}

.question-card-bilingual {
  display: grid;
  gap: 8px;
}

.question-card-bilingual .lang-line {
  color: #e2e8f0;
  line-height: 1.45;
}

.question-card-bilingual .lang-line small {
  color: #67e8f9;
  font-weight: 800;
  margin-right: 8px;
}

.exam-hub-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 8px;
}

.exam-hub-step {
  padding: 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.exam-hub-step strong {
  display: block;
  color: #f8fafc;
  margin-bottom: 6px;
}

.exam-hub-step span {
  color: #94a3b8;
  font-size: 0.86rem;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .exam-question-bilingual-grid,
  .exam-hub-steps {
    grid-template-columns: 1fr;
  }

  .exam-option-bilingual-row {
    grid-template-columns: 28px 1fr;
  }
}