/* ==========================================================================
   TopMCQBD & 5266-BP-APP Smart Layout & Visual Fidelity System
   100% Identical Visual Fidelity, Colors, Cards Grid, Badges & Animations
   Pure Light Theme Only | 1300px Max-Width Standard
   ========================================================================== */

:root {
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --primary-light: #e0f2fe;
  --dark: #0f172a;
  --accent: #5b50e6;
  --accent-light: #ede9fe;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --emerald-600: #059669;
  --emerald-50: #ecfdf5;
  --emerald-200: #a7f3d0;
  --font-bangla: 'Noto Sans Bengali', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body, input, button, select, textarea {
  font-family: 'Noto Sans Bengali', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
}

body {
  font-family: var(--font-bangla) !important;
  background-color: #f8fafc !important;
  color: #0f172a;
  line-height: 1.5;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   MAIN WRAPPER & CONTAINER
   ========================================================================== */
.qb-demo-wrapper,
.smart-hub-wrapper {
  padding: 35px 0 70px;
  background-color: #f8fafc;
  width: 100%;
  box-sizing: border-box;
}

.qb-container,
.smart-hub-container {
  max-width: 1300px !important;
  width: 100% !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  box-sizing: border-box !important;
}

/* ==========================================================================
   HEADER SECTION
   ========================================================================== */
.header-section {
  text-align: center;
  margin-bottom: 30px;
}

.badge-archive {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 18px;
  border-radius: 20px;
  background-color: #fef3c7;
  color: #d97706;
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 14px;
  box-shadow: 0 1px 3px rgba(217, 119, 6, 0.08);
}

.badge-archive svg,
.badge-archive i {
  font-size: 0.95rem;
}

.title-main {
  font-size: 2.35rem;
  color: #0f172a;
  font-weight: 800;
  margin: 0 0 12px 0;
  letter-spacing: -0.5px;
  line-height: 1.3;
}

.title-main span.gradient-text {
  color: #0284c7;
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.desc-sub {
  color: #64748b;
  font-size: 1.02rem;
  max-width: 680px;
  margin: 0 auto 20px auto;
  line-height: 1.6;
}

/* ==========================================================================
   VIEW TOGGLE BAR (Cards Grid vs All Questions vs Mock Test)
   ========================================================================== */
.smart-view-switcher {
  display: inline-flex;
  background: #ffffff;
  padding: 4px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  margin: 0 auto 26px auto;
  gap: 4px;
}

.smart-view-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 9px;
  font-size: 0.92rem;
  font-weight: 700;
  color: #475569;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  white-space: nowrap;
}

.smart-view-btn:hover {
  color: #0f172a;
  background: #f1f5f9;
}

.smart-view-btn.active {
  background: #0284c7;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.3);
}

/* ==========================================================================
   FILTER & SEARCH CARD (EXACT 5266-BP-APP)
   ========================================================================== */
.filter-control-card {
  background: #ffffff;
  border-radius: 14px;
  padding: 16px 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  border: 1px solid #e2e8f0;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pills-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid #e2e8f0;
}

.filter-btn {
  padding: 7px 15px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  border: 1px solid transparent;
  outline: none;
  font-family: inherit;
}

.filter-btn.active {
  border: 1px solid #5b50e6;
  background-color: #5b50e6;
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(91, 80, 230, 0.3);
}

.filter-btn.active .count-badge {
  background: rgba(255, 255, 255, 0.24);
  color: #ffffff;
}

.filter-btn.inactive {
  border: 1px solid #e2e8f0;
  background-color: #f1f5f9;
  color: #475569;
}

.filter-btn.inactive:hover {
  background-color: #e2e8f0;
  color: #0f172a;
}

.filter-btn.inactive .count-badge {
  background: #cbd5e1;
  color: #334155;
}

.count-badge {
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 0.74rem;
  font-weight: 700;
  line-height: 1.3;
}

/* Search & Dropdowns Row */
.qb-search-filter-row {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 14px;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 900px) {
  .qb-search-filter-row {
    grid-template-columns: 1fr;
  }
}

.qb-search-box-wrap {
  position: relative;
  width: 100%;
}

.qb-search-box-wrap svg.search-icon {
  position: absolute;
  left: 14px;
  top: 14px;
  width: 18px;
  height: 18px;
  stroke: #94a3b8;
  pointer-events: none;
}

.qb-search-box-wrap .btn-clear-search {
  position: absolute;
  right: 12px;
  top: 12px;
  border: none;
  background: transparent;
  color: #94a3b8;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 2px 6px;
}

.input-glass {
  width: 100%;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #0f172a;
  font-family: inherit;
  font-size: 0.92rem;
  padding: 10px 14px;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  height: 46px;
  box-sizing: border-box;
}

.input-glass:focus {
  border-color: #5b50e6;
  box-shadow: 0 0 0 3px rgba(91, 80, 230, 0.15);
  background: #ffffff;
}

select.input-glass {
  appearance: auto;
  -webkit-appearance: menulist;
  cursor: pointer;
  font-weight: 600;
  color: #1e293b;
}

/* ==========================================================================
   CARDS GRID LAYOUT (3-COLUMN RESPONSIVE - EXACT 5266-BP-APP)
   ========================================================================== */
.cards-grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

@media (max-width: 640px) {
  .cards-grid-layout {
    grid-template-columns: 1fr;
  }
}

.hub-card-item {
  background-color: #ffffff;
  border-radius: 16px;
  padding: 22px;
  border: 1px solid #e2e8f0;
  border-left: 5px solid #0284c7;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
}

.hub-card-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  border-color: #0284c7;
}

/* Category & Tag Badges */
.card-header-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.category-chip {
  background-color: #e0f2fe;
  color: #0284c7;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(2, 132, 199, 0.2);
  transition: all 0.2s ease;
  user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tag-chip {
  background-color: #f1f5f9;
  color: #475569;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid #e2e8f0;
  transition: all 0.2s ease;
  user-select: none;
}

.tag-chip.ready-chip {
  background-color: #ecfdf5;
  color: #059669;
  border-color: #a7f3d0;
}

/* Card Title */
.card-exam-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 10px 0;
  line-height: 1.35;
}

/* Subject Breakdown Box */
.subject-breakdown-box {
  font-size: 0.86rem;
  color: #334155;
  background-color: #f8fafc;
  padding: 10px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
  line-height: 1.5;
}

/* Meta Stats Row */
.meta-stats-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: #64748b;
  margin-bottom: 16px;
  font-weight: 600;
  border-top: 1px dashed #e2e8f0;
  padding-top: 10px;
}

.meta-stats-row strong {
  color: #334155;
}

/* Card Buttons Flex */
.card-buttons-flex {
  display: flex;
  gap: 10px;
}

.btn-read-solution {
  flex: 1;
  background-color: #f8fafc;
  color: #334155;
  border: 1px solid #cbd5e1;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: inherit;
  box-sizing: border-box;
}

.btn-read-solution:hover {
  background-color: #e2e8f0;
  color: #0f172a;
  border-color: #94a3b8;
}

.btn-start-exam {
  flex: 1.2;
  background-color: #0284c7;
  color: #ffffff;
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.3);
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: inherit;
  box-sizing: border-box;
}

.btn-start-exam:hover {
  background-color: #0369a1;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.4);
  transform: translateY(-1px);
}

/* ==========================================================================
   SMART QUESTIONS VIEW CONTAINER & TOP NAVIGATION
   ========================================================================== */
.smart-questions-wrapper {
  margin-top: 10px;
}

/* Chapter Grouping Header (অধ্যায়ভিত্তিক সেকশন হেডার) */
.chapter-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
  border-left: 4px solid #0284c7;
  border-radius: 12px;
  border-top: 1px solid #e2e8f0;
  border-right: 1px solid #e2e8f0;
  border-bottom: 1px solid #e2e8f0;
  padding: 12px 18px;
  margin: 28px 0 16px 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.chapter-group-header:first-child {
  margin-top: 8px;
}

.chapter-group-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.chapter-group-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #e0f2fe;
  color: #0284c7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.chapter-group-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: #0f172a;
  margin: 0;
  line-height: 1.3;
}

.chapter-group-subject {
  font-size: 0.8rem;
  color: #64748b;
  font-weight: 600;
  margin-top: 2px;
  display: block;
}

.chapter-group-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
}

.smart-topic-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 12px 18px;
  margin-bottom: 24px;
  gap: 14px;
  flex-wrap: wrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.smart-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: #f1f5f9;
  color: #0284c7;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: inherit;
}

.smart-back-btn:hover {
  background: #e2e8f0;
  color: #0369a1;
}

.smart-topic-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  color: #334155;
  font-weight: 700;
}

.smart-mode-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: #e0f2fe;
  color: #0284c7;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
}

/* Empty State */
.smart-empty-box {
  text-align: center;
  padding: 60px 20px;
  background: #ffffff;
  border-radius: 16px;
  border: 1px dashed #cbd5e1;
  margin: 30px 0;
}

.smart-empty-box h3 {
  font-size: 1.2rem;
  color: #0f172a;
  margin-bottom: 8px;
}

.smart-empty-box p {
  color: #64748b;
  font-size: 0.92rem;
  max-width: 500px;
  margin: 0 auto;
}



/* ==========================================================================
   5266-BP-APP JOB SOLUTION PRACTICE: QUESTIONS, OPTIONS & ANSWER VIEW
   ========================================================================== */

/* 1. Question Card Container */
.question-card-5266 {
  background: #ffffff;
  padding: 24px;
  margin-bottom: 20px;
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  border-left: 4px solid #10b981;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  position: relative;
  font-family: 'Noto Sans Bengali', sans-serif !important;
  transition: all 0.2s ease;
}

.question-card-5266:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
  border-color: #cbd5e1;
}

/* 2. Header Badges & Action Tools */
.q-card-header-5266 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

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

.q-badge-num {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 2px 10px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
}

.q-badge-subject {
  background: #ecfdf5;
  color: #047857;
  border: 1px solid #a7f3d0;
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.82rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}

.q-badge-topic {
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #bae6fd;
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.82rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.q-header-right-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-tool-bookmark,
.btn-tool-copy {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  color: #64748b;
  border-radius: 6px;
  padding: 6px 10px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-tool-bookmark:hover,
.btn-tool-copy:hover {
  background: #e2e8f0;
  color: #0f172a;
  border-color: #cbd5e1;
}

.btn-tool-bookmark.active {
  background: #fffbeb;
  border-color: #fde68a;
  color: #b45309;
}

/* 3. Question Text */
.q-text-5266 {
  font-size: 1.18rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.75;
  margin: 0 0 20px 0;
  font-family: 'Noto Sans Bengali', sans-serif !important;
}

/* 4. Options Grid — 4 options in 1 line on Desktop (Exact 5266 layout) */
.question-options-grid {
  font-family: 'Noto Sans Bengali', sans-serif !important;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
  align-items: stretch;
}

@media (max-width: 960px) {
  .question-options-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }
}

@media (max-width: 540px) {
  .question-options-grid {
    grid-template-columns: 1fr !important;
  }
}

/* 5. Option Item Styling */
.option-item-5266 {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  min-width: 0;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  color: #1e293b;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  box-sizing: border-box;
}

.option-item-5266:hover:not(.locked) {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.option-item-5266 .opt-indicator {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: #edf2f7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.98rem;
  flex-shrink: 0;
  color: #1e293b;
}

.option-item-5266 .opt-label {
  flex: 1;
  min-width: 0;
  font-size: 0.96rem;
  line-height: 1.55;
  word-break: break-word;
}

/* Correct Option State */
.option-item-5266.correct {
  background: #ecfdf5 !important;
  border: 1px solid #34d399 !important;
  color: #047857 !important;
  font-weight: 600 !important;
}

.option-item-5266.correct .opt-indicator {
  background: rgba(16, 185, 129, 0.18) !important;
  color: #047857 !important;
}

/* Wrong Selected Option State */
.option-item-5266.wrong {
  background: #fff1f2 !important;
  border: 1px solid #fb7185 !important;
  color: #be123c !important;
  font-weight: 600 !important;
}

.option-item-5266.wrong .opt-indicator {
  background: rgba(225, 29, 72, 0.18) !important;
  color: #be123c !important;
}

.option-item-5266.locked {
  cursor: default;
}

.opt-status-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 6. Explanation Toggle & Action Bar */
.q-action-bar-5266 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.btn-toggle-expl-5266 {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: none;
  padding: 4px 0;
  color: #059669;
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: color 0.18s ease;
  font-family: inherit;
}

.btn-toggle-expl-5266:hover {
  color: #047857;
}

/* 7. Expanded Explanation Section */
.explanation-box-5266 {
  margin-top: 14px;
  padding: 18px;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  font-size: 0.94rem;
  line-height: 1.7;
  display: none;
}

.explanation-box-5266.show {
  display: block;
}

.expl-correct-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #047857;
  font-weight: 700;
  margin-bottom: 14px;
  font-size: 1rem;
  flex-wrap: wrap;
}

.expl-title-row {
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
}

.expl-text-body {
  padding-left: 12px;
  border-left: 3px solid #10b981;
  line-height: 1.8;
  font-size: 1.02rem;
  color: #334155;
}

/* 8. Floating Bottom-Left Practice Progress Pill (Exact 5266-BP-APP) */
.quiz-floating-progress-left {
  position: fixed;
  bottom: 25px;
  left: 25px;
  z-index: 999;
  display: flex;
  align-items: center;
  transition: all 0.25s ease-in-out;
  animation: quizSlideInLeft 0.3s ease forwards;
}

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

.quiz-progress-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #ffffff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 8px 18px;
  font-size: 14.5px;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(30, 64, 175, 0.09), 0 1px 3px rgba(0, 0, 0, 0.04);
  white-space: nowrap;
  user-select: none;
  font-family: 'Noto Sans Bengali', sans-serif !important;
  transition: all 0.2s ease;
}

.quiz-progress-pill-badge:hover {
  border-color: #93c5fd;
  box-shadow: 0 6px 18px rgba(30, 64, 175, 0.14);
}

.quiz-pill-divider {
  color: #94a3b8;
  font-weight: 400;
  opacity: 0.75;
}

@media (max-width: 768px) {
  .quiz-floating-progress-left {
    bottom: 15px;
    left: 12px;
    z-index: 990;
  }
  .quiz-progress-pill-badge {
    padding: 6px 14px;
    font-size: 13px;
    gap: 8px;
  }
}

/* 9. Practice Mode Switcher (Practice vs Read Mode) */
.practice-mode-segmented {
  display: inline-flex;
  background: #f1f5f9;
  padding: 4px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  gap: 4px;
}

.practice-mode-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: #475569;
  transition: all 0.2s ease;
  font-family: inherit;
}

.practice-mode-btn.active {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

/* ==========================================================================
   STICKY SCORE BAR & HEADER SWAPPING IN EXAM / QUESTIONS SECTION
   ========================================================================== */

.site-master-header {
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.site-master-header.header-hidden-for-exam {
  transform: translateY(-100%) !important;
}

.stats-bar {
  max-width: 1300px !important;
  width: 100% !important;
  margin: 0 auto 20px auto !important;
  box-sizing: border-box !important;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 12px 18px;
  transition: all 0.25s ease;
}

.stats-bar-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  width: 100% !important;
  max-width: 1300px !important;
  margin: 0 auto !important;
  padding: 0 !important;
  box-sizing: border-box !important;
}

.stats-bar.sticky-score-bar {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 !important;
  padding: 10px 0 !important;
  border-radius: 0 0 16px 16px !important;
  border-top: none !important;
  border-left: none !important;
  border-right: none !important;
  border-bottom: 1px solid #e2e8f0 !important;
  background: rgba(255, 255, 255, 0.97) !important;
  backdrop-filter: blur(14px) !important;
  -webkit-backdrop-filter: blur(14px) !important;
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.12) !important;
  z-index: 99998 !important;
  animation: slideDownScoreBar 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

@keyframes slideDownScoreBar {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ==========================================================================
   200-QUESTIONS CHUNK PAGINATION STYLES
   ========================================================================== */

.chunk-pagination-container {
  max-width: 1300px !important;
  width: 100% !important;
  margin: 35px auto 25px auto !important;
  padding: 22px 24px;
  box-sizing: border-box !important;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
  text-align: center;
  font-family: 'Noto Sans Bengali', sans-serif;

.chunk-pagination-title {
  font-size: 0.96rem;
  font-weight: 700;
  color: #334155;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.chunk-dropdown-jump {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1.5px solid #cbd5e1;
  background: #f8fafc;
  color: #0f172a;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  font-family: inherit;
  transition: all 0.2s ease;
}

.chunk-dropdown-jump:focus {
  border-color: #0284c7;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.chunk-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

.chunk-page-btn {
  padding: 8px 18px;
  border-radius: 10px;
  border: 1.5px solid #cbd5e1;
  background: #f8fafc;
  color: #1e293b;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: inherit;
  min-width: 110px;
}

.chunk-page-btn:hover {
  border-color: #0284c7;
  background: #f0f9ff;
  color: #0284c7;
  transform: translateY(-1px);
}

.chunk-page-btn.active {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  border-color: #0284c7;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
  transform: translateY(-1px);
}

.chunk-nav-btn {
  padding: 8px 18px;
  border-radius: 10px;
  border: 1.5px solid #cbd5e1;
  background: #ffffff;
  color: #0284c7;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.chunk-nav-btn:hover:not(:disabled) {
  background: #0284c7;
  color: #ffffff;
  border-color: #0284c7;
}

.chunk-ellipsis {
  padding: 0 6px;
  color: #94a3b8;
  font-weight: 700;
  user-select: none;
}

/* ==========================================================================
   PURE 1300PX STANDARD ALIGNMENT & RESPONSIVE GUTTER RULES
   ========================================================================== */
.filter-control-card,
#smartChapterCardsView,
#chapterCardsGrid,
#smartQuestionsView,
.question-card-5266 {
  width: 100% !important;
  box-sizing: border-box !important;
}

.stats-bar.sticky-score-bar .stats-bar-inner {
  max-width: 1300px !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  box-sizing: border-box !important;
}

footer {
  max-width: 1300px !important;
  width: 100% !important;
  margin: 40px auto 0 auto !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  box-sizing: border-box !important;
}

@media (max-width: 1340px) {
  .site-header-inner,
  .qb-container,
  .smart-hub-container,
  .stats-bar.sticky-score-bar .stats-bar-inner,
  footer {
    padding-left: 20px !important;
    padding-right: 20px !important;
  }
}