/* CBT Exam Practice Plugin Stylesheet - Advanced Mobile Drawer & Fullscreen Optimization */

#cbt-exam-app {
  --cbt-primary: #1E3A8A;
  --cbt-primary-light: #3B82F6;
  --cbt-success: #16A34A;
  --cbt-warning: #D97706;
  --cbt-danger: #DC2626;
  --cbt-review: #7E22CE;
  --cbt-dark: #0F172A;
  --cbt-light-bg: #F8FAFC;
  --cbt-card-bg: #FFFFFF;
  --cbt-border: #E2E8F0;

  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--cbt-dark);
  background-color: #F1F5F9;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  margin: 15px 0;
  display: flex;
  flex-direction: column;
  min-height: 600px;
  max-width: 100%;
  box-sizing: border-box;
  position: relative;
  transition: all 0.3s ease;
}

#cbt-exam-app * {
  box-sizing: border-box;
}

/* BACKDROP OVERLAY WHEN PALETTE DRAWER IS OPEN */
#cbt-exam-app .cbt-palette-backdrop {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(2px);
  z-index: 99999999;
}
#cbt-exam-app.cbt-palette-open {
  overflow: visible !important;
}
#cbt-exam-app.cbt-palette-open .cbt-palette-backdrop {
  display: block;
}

/* FULLSCREEN / MAXIMIZE MODE */
#cbt-exam-app.cbt-fullscreen-mode {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100vw !important;
  max-height: 100vh !important;
  margin: 0 !important;
  border-radius: 0 !important;
  z-index: 99999999 !important;
  overflow-y: auto !important;
  box-shadow: none !important;
}

#cbt-exam-app.cbt-fullscreen-mode .cbt-container {
  flex: 1;
  min-height: 0;
}

/* Header */
#cbt-exam-app .cbt-header {
  background: linear-gradient(135deg, #1E3A8A, #1E40AF);
  color: #FFFFFF;
  padding: 10px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  position: relative !important;
  z-index: 100000005 !important;
  flex-wrap: wrap;
  gap: 8px;
}
#cbt-exam-app .exam-info {
  display: flex;
  flex-direction: column;
}
#cbt-exam-app .exam-title {
  font-size: 12pt;
  font-weight: 800;
  letter-spacing: 0.5px;
  line-height: 1.3;
}
#cbt-exam-app .exam-sub {
  font-size: 8.5pt;
  color: #BFDBFE;
}
#cbt-exam-app .user-timer-box {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* Candidate Profile Box */
#cbt-exam-app .candidate-profile-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  padding: 3px 8px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.25);
}
#cbt-exam-app .candidate-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid #38BDF8;
  object-fit: cover;
  background: #ffffff;
  display: block;
}
#cbt-exam-app .candidate-meta {
  text-align: left;
  line-height: 1.2;
}
#cbt-exam-app .candidate-meta .c-name {
  color: #FFFFFF;
  font-size: 8pt;
  font-weight: 700;
  max-width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#cbt-exam-app .candidate-meta .c-sub {
  color: #BFDBFE;
  font-size: 7pt;
}

/* Timer Badge */
#cbt-exam-app .timer-badge {
  background: #0F172A;
  border: 2px solid #38BDF8;
  color: #38BDF8;
  font-family: 'Courier New', Courier, monospace;
  font-size: 12.5pt;
  font-weight: 900;
  padding: 4px 9px;
  border-radius: 6px;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 5px;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.3);
}

/* Fullscreen Toggle Button */
#cbt-exam-app .btn-fullscreen {
  background: rgba(255, 255, 255, 0.15);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  color: #FFFFFF;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 8pt;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s;
  user-select: none;
}
#cbt-exam-app .btn-fullscreen:hover {
  background: rgba(255, 255, 255, 0.3);
}
#cbt-exam-app.cbt-fullscreen-mode .btn-fullscreen {
  background: #EF4444;
  border-color: #DC2626;
}

/* PALETTE TOGGLE BUTTON IN HEADER (Green prominent button) */
#cbt-exam-app .btn-palette-toggle {
  background: #16A34A;
  border: 1.5px solid #22C55E;
  color: #FFFFFF;
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 8.5pt;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.2s;
  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
  user-select: none;
}
#cbt-exam-app .btn-palette-toggle:hover {
  background: #15803D;
  transform: translateY(-1px);
}
#cbt-exam-app .btn-palette-toggle.active-palette {
  background: #DC2626;
  border-color: #EF4444;
}

/* Main Workspace */
#cbt-exam-app .cbt-container {
  display: flex;
  flex: 1;
  background: #F8FAFC;
  position: relative;
}

/* Pure Question Area */
#cbt-exam-app .main-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 14px 18px;
  overflow-y: auto;
}

/* Section Nav (Horizontal Scroll) */
#cbt-exam-app .section-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  border-bottom: 2px solid var(--cbt-border);
  padding-bottom: 8px;
  overflow-x: auto;
  white-space: nowrap;
  flex-wrap: nowrap;
  -webkit-overflow-scrolling: touch;
}
#cbt-exam-app .sec-btn {
  flex-shrink: 0;
  padding: 5px 14px;
  background: #FFFFFF;
  border: 1.5px solid var(--cbt-border);
  border-radius: 20px;
  font-size: 9pt;
  font-weight: 700;
  color: #475569;
  cursor: pointer;
  transition: all 0.2s;
}
#cbt-exam-app .sec-btn:hover {
  background: #EFF6FF;
  border-color: #93C5FD;
}
#cbt-exam-app .sec-btn.active {
  background: var(--cbt-primary);
  color: #FFFFFF;
  border-color: var(--cbt-primary);
  box-shadow: 0 2px 5px rgba(30, 58, 138, 0.3);
}

#cbt-exam-app .q-meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #FFFFFF;
  padding: 8px 14px;
  border-radius: 8px 8px 0 0;
  border: 1.5px solid var(--cbt-border);
  border-bottom: none;
  font-size: 9.5pt;
  font-weight: bold;
  color: #334155;
  flex-wrap: wrap;
  gap: 6px;
}
#cbt-exam-app .q-card-main {
  background: #FFFFFF;
  border: 1.5px solid var(--cbt-border);
  border-radius: 0 0 8px 8px;
  padding: 18px 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  flex: 1;
  display: flex;
  flex-direction: column;
}
#cbt-exam-app .q-image-container img {
  max-width: 100%;
  max-height: 240px;
  object-fit: contain;
  border-radius: 6px;
  border: 1px solid var(--cbt-border);
  padding: 4px;
}

/* BOTH HINDI & ENGLISH FONTS BOLD & ULTRA-CLEAR */
#cbt-exam-app .q-text-hi {
  font-size: 11.5pt;
  font-weight: 700;
  color: #0F172A;
  line-height: 1.65;
  margin-bottom: 8px;
  word-break: break-word;
}
#cbt-exam-app .q-text-en {
  font-size: 11pt;
  font-weight: 700 !important; /* Bold like Hindi */
  color: #1E293B !important;   /* Dark high-contrast */
  line-height: 1.6;
  margin-bottom: 14px;
  word-break: break-word;
}

#cbt-exam-app .q-diagram {
  margin: 8px auto;
  text-align: center;
  max-width: 100%;
  overflow-x: auto;
}

/* Options */
#cbt-exam-app .options-grid {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin: 12px 0 6px 0;
}
#cbt-exam-app .opt-label {
  display: flex;
  align-items: center;
  background: #F8FAFC;
  border: 1.5px solid #CBD5E1;
  border-radius: 7px;
  padding: 10px 14px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 10.5pt;
  font-weight: 600;
  color: #1E293B;
  min-height: 44px; /* Google Touch Friendly Target */
  word-break: break-word;
}
#cbt-exam-app .opt-label:hover {
  background: #EFF6FF;
  border-color: #93C5FD;
}
#cbt-exam-app .opt-label.selected {
  background: #EFF6FF;
  border-color: #2563EB;
  font-weight: 700;
  color: #1E40AF;
  box-shadow: 0 0 0 1px #2563EB;
}
#cbt-exam-app .opt-radio {
  margin-right: 12px;
  accent-color: #2563EB;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ACTION BAR (Under Options for Direct Thumb Reach) */
#cbt-exam-app .action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #FFFFFF;
  padding: 10px 14px;
  border: 1.5px solid var(--cbt-border);
  border-radius: 8px;
  margin-top: 12px;
  gap: 8px;
  flex-wrap: wrap;
}
#cbt-exam-app .action-group {
  display: flex;
  gap: 8px;
  align-items: center;
}
#cbt-exam-app .btn-action {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 9pt;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
#cbt-exam-app .btn-save-next {
  background: var(--cbt-success);
  color: #FFFFFF;
  border: none;
  box-shadow: 0 2px 6px rgba(22, 163, 74, 0.35);
}
#cbt-exam-app .btn-save-next:hover {
  background: #15803D;
}
#cbt-exam-app .btn-review { background: var(--cbt-review); color: #FFFFFF; border: none; }
#cbt-exam-app .btn-clear { background: #FFFFFF; color: #475569; border: 1.5px solid #CBD5E1; }
#cbt-exam-app .btn-nav { background: #FFFFFF; color: var(--cbt-primary); border: 1.5px solid var(--cbt-primary); }
#cbt-exam-app .btn-nav:hover { background: #EFF6FF; }

/* =======================================================
   PALETTE PANEL (SIDE-BY-SIDE DESKTOP / SLIDE-IN DRAWER ON MOBILE)
   ======================================================= */
#cbt-exam-app .palette-panel {
  width: 310px;
  background: #FFFFFF;
  border-left: 1.5px solid var(--cbt-border);
  display: flex;
  flex-direction: column;
}

/* Close bar on top of palette drawer */
#cbt-exam-app .palette-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #1E3A8A;
  color: #FFFFFF;
  padding: 10px 14px;
  font-size: 10.5pt;
  font-weight: bold;
}
#cbt-exam-app .btn-palette-close {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #FFFFFF;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 8.5pt;
  cursor: pointer;
  font-weight: bold;
  transition: all 0.2s;
}
#cbt-exam-app .btn-palette-close:hover {
  background: #DC2626;
  border-color: #DC2626;
}

/* STUDY TOOLS */
#cbt-exam-app .palette-tools-box {
  background: #F8FAFC;
  border-bottom: 1.5px solid var(--cbt-border);
  padding: 10px 12px;
}
#cbt-exam-app .tools-header-label {
  font-size: 8pt;
  font-weight: 800;
  color: #64748B;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
#cbt-exam-app .tools-btn-group {
  display: flex;
  gap: 6px;
}
#cbt-exam-app .btn-hint,
#cbt-exam-app .btn-sol {
  flex: 1;
  padding: 6px 4px;
  font-size: 8.5pt;
  font-weight: 700;
  border-radius: 5px;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}
#cbt-exam-app .btn-hint {
  background: #FEF3C7;
  border: 1.5px solid #FCD34D;
  color: #92400E;
}
#cbt-exam-app .btn-hint:hover { background: #FDE68A; }
#cbt-exam-app .btn-sol {
  background: #DCFCE7;
  border: 1.5px solid #86EFAC;
  color: #166534;
}
#cbt-exam-app .btn-sol:hover { background: #BBF7D0; }

#cbt-exam-app .hint-box, #cbt-exam-app .sol-box {
  display: none;
  border-radius: 6px;
  padding: 9px 12px;
  margin-top: 8px;
  font-size: 8.5pt;
  line-height: 1.45;
  max-height: 180px;
  overflow-y: auto;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.04);
}
#cbt-exam-app .hint-box {
  background: #FFFBEB;
  border-left: 4px solid #D97706;
  color: #92400E;
}
#cbt-exam-app .sol-box {
  background: #F0FDF4;
  border-left: 4px solid #16A34A;
  color: #166534;
}
#cbt-exam-app .sol-box .trick {
  background: #EFF6FF;
  border-left: 3px solid #2563EB;
  padding: 5px 8px;
  margin: 6px 0;
  color: #1E40AF;
  font-weight: bold;
  border-radius: 0 4px 4px 0;
}

#cbt-exam-app .palette-header {
  background: #F8FAFC;
  padding: 8px 12px;
  border-bottom: 1.5px solid var(--cbt-border);
  font-size: 10pt;
  font-weight: 800;
  color: #1E3A8A;
  display: flex;
  justify-content: space-between;
}
#cbt-exam-app .legend-box {
  padding: 8px 10px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px 8px;
  font-size: 7.5pt;
  font-weight: bold;
  border-bottom: 1px solid var(--cbt-border);
  background: #F8FAFC;
}
#cbt-exam-app .legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
}
#cbt-exam-app .legend-badge {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 7pt;
  font-weight: 800;
  color: #FFFFFF;
}
#cbt-exam-app .badge-answered { background: var(--cbt-success); }
#cbt-exam-app .badge-not-answered { background: var(--cbt-danger); }
#cbt-exam-app .badge-not-visited { background: #E2E8F0; color: #475569; border: 1px solid #CBD5E1; }
#cbt-exam-app .badge-review { background: var(--cbt-review); }

/* Questions Grid */
#cbt-exam-app .grid-container {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  max-height: 350px;
}
#cbt-exam-app .q-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}
#cbt-exam-app .q-cell {
  height: 34px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9pt;
  font-weight: bold;
  cursor: pointer;
  background: #E2E8F0;
  color: #334155;
  border: 1.5px solid #CBD5E1;
  transition: all 0.15s;
  user-select: none;
}
#cbt-exam-app .q-cell:hover { transform: scale(1.05); }
#cbt-exam-app .q-cell.active-q { outline: 2.5px solid #2563EB; outline-offset: 1px; }
#cbt-exam-app .q-cell.answered { background: var(--cbt-success); color: #FFFFFF; border-color: #15803D; }
#cbt-exam-app .q-cell.not-answered { background: var(--cbt-danger); color: #FFFFFF; border-color: #B91C1C; }
#cbt-exam-app .q-cell.review { background: var(--cbt-review); color: #FFFFFF; border-color: #6B21A8; }
#cbt-exam-app .q-cell.ans-review {
  background: var(--cbt-review);
  color: #FFFFFF;
  border-color: #6B21A8;
  position: relative;
}
#cbt-exam-app .q-cell.ans-review::after {
  content: '';
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #4ADE80;
  border: 1px solid #FFFFFF;
}

#cbt-exam-app .palette-footer {
  padding: 8px 10px;
  border-top: 1.5px solid var(--cbt-border);
  background: #F8FAFC;
}
#cbt-exam-app .btn-submit {
  width: 100%;
  padding: 10px;
  background: linear-gradient(135deg, #1E3A8A, #2563EB);
  color: #FFFFFF;
  border: none;
  border-radius: 5px;
  font-size: 10pt;
  font-weight: 800;
  cursor: pointer;
}

/* MODAL RESULTS */
#cbt-exam-app .modal-overlay,
.modal-overlay#resultModal {
  display: none !important;
  position: fixed !important;
  top: 0 !important; left: 0 !important; right: 0 !important; bottom: 0 !important;
  background: rgba(15, 23, 42, 0.75) !important;
  z-index: 2147483647 !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 12px !important;
}
#cbt-exam-app .modal-card {
  background: #FFFFFF;
  border-radius: 12px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px;
}
#cbt-exam-app .modal-title { font-size: 14pt; font-weight: 800; color: #1E3A8A; text-align: center; }
#cbt-exam-app .score-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 14px 0;
  text-align: center;
}
#cbt-exam-app .score-box { background: #F8FAFC; border: 1.5px solid var(--cbt-border); border-radius: 6px; padding: 8px 4px; }
#cbt-exam-app .score-val { font-size: 14pt; font-weight: 900; margin-top: 2px; }
#cbt-exam-app .modal-close-btn {
  display: block;
  width: 100%;
  padding: 10px;
  background: var(--cbt-primary);
  color: #FFFFFF;
  border: none;
  border-radius: 6px;
  font-size: 10pt;
  font-weight: bold;
  cursor: pointer;
  margin-top: 12px;
}

/* =========================================================================
   MOBILE & TABLET RESPONSIVE RULES (<= 900px) & FULLSCREEN PALETTE OVERLAY
   ========================================================================= */

@media(max-width: 900px) {
  /* HIDE PALETTE BY DEFAULT ON MOBILE & TABLET (Never covers questions!) */
  #cbt-exam-app .palette-panel {
    display: none !important;
  }

  /* WHEN TOGGLED OPEN: SLIDE-IN DRAWER OVERLAY */
  #cbt-exam-app.cbt-palette-open .palette-panel {
    display: flex !important;
    position: fixed !important;
    top: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 86% !important;
    max-width: 350px !important;
    height: 100vh !important;
    background: #FFFFFF !important;
    z-index: 100000000 !important;
    box-shadow: -6px 0 25px rgba(0, 0, 0, 0.45) !important;
    overflow-y: auto !important;
    border-left: 2px solid var(--cbt-border) !important;
    animation: cbtSlideInRight 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }

  #cbt-exam-app .cbt-container {
    flex-direction: column;
  }
}

/* Mobile Screen Specific Optimizations (<= 640px) */
@media(max-width: 640px) {
  #cbt-exam-app {
    margin: 8px 0;
    border-radius: 6px;
  }

  #cbt-exam-app .cbt-header {
    padding: 8px 12px;
  }
  
  #cbt-exam-app .exam-info {
    max-width: 100%;
    width: 100%;
    margin-bottom: 4px;
  }

  #cbt-exam-app .exam-title {
    font-size: 10.5pt;
  }

  #cbt-exam-app .exam-sub {
    font-size: 7.5pt;
  }

  #cbt-exam-app .user-timer-box {
    width: 100%;
    justify-content: space-between;
    padding-top: 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
  }

  #cbt-exam-app .candidate-tag {
    display: block;
  }

  #cbt-exam-app .candidate-meta .c-name {
    max-width: 90px;
    font-size: 7.5pt;
  }

  #cbt-exam-app .timer-badge {
    font-size: 11pt;
    padding: 2px 6px;
  }

  #cbt-exam-app .btn-fullscreen {
    font-size: 7.5pt;
    padding: 3px 6px;
  }

  #cbt-exam-app .btn-palette-toggle {
    font-size: 7.5pt;
    padding: 3px 7px;
  }

  #cbt-exam-app .main-panel {
    padding: 10px 12px;
  }

  #cbt-exam-app .q-card-main {
    padding: 14px 14px;
  }

  #cbt-exam-app .q-text-hi {
    font-size: 11pt;
  }

  #cbt-exam-app .q-text-en {
    font-size: 10.5pt;
  }

  /* MOBILE ACTION BAR - 2 CLEAN ROWS */
  #cbt-exam-app .action-bar {
    flex-direction: column;
    padding: 8px 10px;
    gap: 6px;
  }

  #cbt-exam-app .action-group-primary {
    width: 100%;
    display: flex;
    gap: 6px;
  }

  #cbt-exam-app .action-group-primary .btn-save-next {
    flex: 2;
    padding: 10px 6px;
    font-size: 9.5pt;
    text-align: center;
  }

  #cbt-exam-app .action-group-primary .btn-nav {
    flex: 1;
    padding: 10px 6px;
    font-size: 9pt;
    text-align: center;
  }

  #cbt-exam-app .action-group-secondary {
    width: 100%;
    display: flex;
    gap: 6px;
  }

  #cbt-exam-app .action-group-secondary .btn-action {
    flex: 1;
    padding: 7px 4px;
    font-size: 8pt;
    text-align: center;
  }

  /* RESPONSIVE 2x2 SCORE GRID ON MOBILE */
  #cbt-exam-app .score-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
}

@keyframes cbtSlideInRight {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}


/* === CBT v2.9 SVG & MathJax Chemical Structure Enhancements === */
#cbt-exam-app .q-diagram-svg,
#cbt-exam-app .q-text-hi svg,
#cbt-exam-app .q-text-en svg {
  display: block !important;
  margin: 12px auto !important;
  max-width: 100% !important;
  height: auto !important;
  background: #ffffff !important;
  border-radius: 6px !important;
  padding: 4px !important;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05) !important;
}

#cbt-exam-app .opt-label svg {
  display: inline-block !important;
  vertical-align: middle !important;
  max-height: 110px !important;
  max-width: 160px !important;
  margin: 6px 8px !important;
  background: #ffffff !important;
  border-radius: 4px !important;
}

#cbt-exam-app mjx-container {
  display: inline-block !important;
  margin: 0 2px !important;
  outline: none !important;
  font-size: 105% !important;
}

#cbt-exam-app mjx-container[jax="CHTML"][display="true"] {
  display: block !important;
  margin: 10px 0 !important;
  text-align: center !important;
}


/* === CBT Portal Logo & Branding Styles === */
#cbt-exam-app .cbt-logo-container {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

#cbt-exam-app .cbt-site-logo-img {
  width: 200px !important;
  height: 33px !important;
  max-width: 200px !important;
  max-height: 33px !important;
  aspect-ratio: 200 / 33 !important;
  object-fit: contain !important;
  display: inline-block !important;
  vertical-align: middle !important;
}

#cbt-exam-app .cbt-eras-logo {
  font-family: 'Eras Bold ITC', 'Eras Demi ITC', 'Trebuchet MS', 'Arial Black', sans-serif;
  font-size: 22pt;
  font-weight: 900;
  letter-spacing: -0.5px;
  line-height: 1.1;
  display: inline-flex;
  align-items: baseline;
  user-select: none;
}

#cbt-exam-app .cbt-eras-logo .chem-text {
  color: #D6CAA8;
  text-shadow: 1.5px 1.5px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1.5px 0 #000, 2.5px 2.5px 0 rgba(0,0,0,0.85);
}

#cbt-exam-app .cbt-eras-logo .chem-a {
  color: #17B2B2;
  text-shadow: 1.5px 1.5px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1.5px 0 #000, 2.5px 2.5px 0 rgba(0,0,0,0.85);
}

#cbt-exam-app .cbt-eras-logo .chem-b {
  color: #8CC63F;
  text-shadow: 1.5px 1.5px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1.5px 0 #000, 2.5px 2.5px 0 rgba(0,0,0,0.85);
}

#cbt-exam-app .cbt-eras-logo .chem-c {
  color: #D97706;
  text-shadow: 1.5px 1.5px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1.5px 0 #000, 2.5px 2.5px 0 rgba(0,0,0,0.85);
}

@media (max-width: 768px) {
  #cbt-exam-app .cbt-eras-logo {
    font-size: 16pt !important;
  }
  #cbt-exam-app .cbt-site-logo-img {
    max-height: 32px !important;
  }
}

/* === Virtual Scientific Calculator Styles === */
.cbt-calc-modal {
  position: fixed;
  top: 60px;
  right: 20px;
  width: 270px;
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.3), 0 10px 10px -5px rgba(0,0,0,0.2);
  border: 1.5px solid #cbd5e1;
  z-index: 99999;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.cbt-calc-header {
  background: #1e3a8a;
  color: #ffffff;
  padding: 8px 12px;
  font-size: 11.5px;
  font-weight: bold;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cbt-calc-close {
  background: none;
  border: none;
  color: #ffffff;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
}

.cbt-calc-body {
  padding: 10px;
}

.cbt-calc-display {
  width: 100%;
  height: 38px;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 18px;
  font-weight: bold;
  text-align: right;
  padding: 4px 8px;
  color: #0f172a;
  margin-bottom: 8px;
  box-sizing: border-box;
}

.cbt-calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
}

.cbt-calc-grid button {
  height: 32px;
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  border-radius: 5px;
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  color: #1e293b;
  transition: all 0.1s;
}

.cbt-calc-grid button:hover {
  background: #e2e8f0;
}

.cbt-calc-grid button.btn-calc-op {
  background: #e0e7ff;
  color: #3730a3;
}

.cbt-calc-grid button.btn-calc-fn {
  background: #fef3c7;
  color: #92400e;
  font-size: 11px;
}

.cbt-calc-grid button.btn-calc-clear {
  background: #fee2e2;
  color: #991b1b;
}

.cbt-calc-grid button.btn-calc-equals {
  background: #16a34a;
  color: #ffffff;
  border-color: #16a34a;
}

/* === NTA Attempt Limit Toast Notification === */
.cbt-limit-toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: #7f1d1d;
  color: #ffffff;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 12.5px;
  line-height: 1.4;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.4);
  z-index: 9999999;
  max-width: 90%;
  border: 1.5px solid #f87171;
  animation: cbtFadeIn 0.3s ease-out;
}

@keyframes cbtFadeIn {
  from { opacity: 0; transform: translate(-50%, 15px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* === Scorecard Table Styling === */
.cbt-scorecard-table th, .cbt-scorecard-table td {
  border: 1px solid #e2e8f0;
}

/* === Print Scorecard Mode === */
@media print {
  body * {
    visibility: hidden;
  }
  #resultModal, #resultModal .modal-card, #resultModal .modal-card * {
    visibility: visible;
  }
  #resultModal {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: auto;
    background: #ffffff !important;
    display: block !important;
  }
  #resultModal .modal-card {
    box-shadow: none !important;
    border: none !important;
    width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
  }
  #resultModal button {
    display: none !important;
  }
}

/* Clean Header & Container Isolation */
#cbt-exam-app {
  clear: both !important;
  position: relative !important;
}
#cbt-exam-app .cbt-header {
  position: relative !important;
  z-index: 100 !important;
  clear: both !important;
}

#cbt-exam-app .main-panel {
  position: relative !important;
  z-index: 10 !important;
}
#cbt-exam-app .q-card-main {
  position: relative !important;
  z-index: 20 !important;
  background: #FFFFFF !important;
}

/* ==========================================================================
   RAZORPAY / PHONEPE PAYWALL CARD & CHECKOUT STYLES
   ========================================================================== */
#cbt-exam-app .cbt-paywall-screen {
  width: 100%;
  padding: 40px 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #F8FAFC;
  min-height: 520px;
}
#cbt-exam-app .cbt-paywall-card {
  background: #FFFFFF;
  border-radius: 14px;
  border: 1.5px solid #CBD5E1;
  box-shadow: 0 10px 30px -5px rgba(30, 58, 138, 0.12);
  padding: 30px 24px;
  max-width: 580px;
  width: 100%;
  text-align: center;
}
#cbt-exam-app .paywall-badge {
  background: #EFF6FF;
  color: #1E40AF;
  border: 1px solid #BFDBFE;
  font-size: 8.5pt;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-block;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
#cbt-exam-app .paywall-title {
  font-size: 15pt;
  font-weight: 900;
  color: #0F172A;
  margin: 0 0 8px 0;
  line-height: 1.3;
}
#cbt-exam-app .paywall-sub {
  font-size: 9pt;
  color: #475569;
  margin: 0 0 16px 0;
  line-height: 1.5;
}
#cbt-exam-app .paywall-price-box {
  background: linear-gradient(135deg, #F0FDF4, #DCFCE7);
  border: 1.5px solid #86EFAC;
  border-radius: 10px;
  padding: 12px 20px;
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 18px;
}
#cbt-exam-app .p-currency {
  font-size: 16pt;
  font-weight: 800;
  color: #15803D;
}
#cbt-exam-app .p-amount {
  font-size: 26pt;
  font-weight: 900;
  color: #166534;
}
#cbt-exam-app .p-note {
  font-size: 9pt;
  color: #15803D;
  font-weight: 600;
  margin-left: 6px;
}
#cbt-exam-app .paywall-perks {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 7px;
  background: #F8FAFC;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid #E2E8F0;
  margin-bottom: 18px;
  font-size: 9pt;
  color: #334155;
  line-height: 1.4;
}
#cbt-exam-app .pay-inputs-row {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 14px;
}
#cbt-exam-app .pay-inputs-row input {
  width: 100% !important;
  padding: 10px 12px !important;
  border: 1.5px solid #CBD5E1 !important;
  border-radius: 6px !important;
  font-size: 10pt !important;
  box-sizing: border-box !important;
}
#cbt-exam-app .pay-inputs-row input:focus {
  border-color: #2563EB !important;
  outline: none !important;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15) !important;
}
#cbt-exam-app .btn-pay-unlock {
  width: 100%;
  padding: 12px 16px;
  background: linear-gradient(135deg, #16A34A, #15803D);
  color: #FFFFFF;
  border: none;
  border-radius: 8px;
  font-size: 10.5pt;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(22, 163, 74, 0.35);
  transition: all 0.2s;
}
#cbt-exam-app .btn-pay-unlock:hover {
  background: linear-gradient(135deg, #15803D, #166534);
  transform: translateY(-1px);
}
#cbt-exam-app .paywall-trust-row {
  margin-top: 12px;
  font-size: 7.5pt;
  color: #64748B;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
#cbt-exam-app .pay-apps-label {
  color: #1E3A8A;
  font-weight: bold;
}


/* Desktop Palette Collapse/Expand Support */
#cbt-exam-app.cbt-palette-closed .palette-panel {
  display: none !important;
}
#cbt-exam-app.cbt-palette-closed .main-panel {
  flex: 1 1 100% !important;
  max-width: 100% !important;
}

/* Fullscreen High Z-Index & Parent Escaping */
#cbt-exam-app.cbt-fullscreen-mode {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100vw !important;
  max-height: 100vh !important;
  margin: 0 !important;
  border-radius: 0 !important;
  z-index: 2147483647 !important;
  overflow-y: auto !important;
}

/* ==========================================================================
   FULLSCREEN SECTION NAV & SVG ACCURACY FIXES
   ========================================================================== */
#cbt-exam-app.cbt-fullscreen-mode .section-nav {
  display: flex !important;
  flex-wrap: wrap !important;
  gap: 6px !important;
  padding: 4px 0 8px 0 !important;
  margin-bottom: 8px !important;
  overflow: visible !important;
  width: 100% !important;
}

#cbt-exam-app.cbt-fullscreen-mode .sec-btn {
  padding: 4px 10px !important;
  font-size: 8.5pt !important;
  border-radius: 6px !important;
  white-space: nowrap !important;
  height: auto !important;
}

#cbt-exam-app.cbt-fullscreen-mode .main-panel {
  padding: 10px 16px !important;
  overflow-y: auto !important;
}

#cbt-exam-app .q-diagram-svg,
#cbt-exam-app .q-diagram,
#cbt-exam-app svg {
  margin: 12px auto !important;
  text-align: center !important;
  display: block !important;
  max-width: 100% !important;
  height: auto !important;
  overflow: visible !important;
}

/* ==========================================================================
   FULLSCREEN SECTION NAV & CENTERED SVG DIAGRAM FIXES
   ========================================================================== */
#cbt-exam-app.cbt-fullscreen-mode {
  left: 0 !important;
  top: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100vw !important;
  margin: 0 !important;
  transform: none !important;
}

#cbt-exam-app.cbt-fullscreen-mode .cbt-container {
  width: 100% !important;
  max-width: 100% !important;
  padding: 0 !important;
  margin: 0 !important;
}

#cbt-exam-app.cbt-fullscreen-mode .main-panel {
  padding: 10px 18px !important;
  width: 100% !important;
  overflow-y: auto !important;
}

#cbt-exam-app.cbt-fullscreen-mode .section-nav {
  display: flex !important;
  flex-wrap: wrap !important;
  gap: 8px !important;
  padding: 8px 14px !important;
  background: #EFF6FF !important;
  border-bottom: 2px solid #BFDBFE !important;
  border-radius: 6px !important;
  width: 100% !important;
  overflow: visible !important;
  margin-bottom: 10px !important;
}

#cbt-exam-app.cbt-fullscreen-mode .sec-btn {
  padding: 5px 12px !important;
  font-size: 8.5pt !important;
  font-weight: 700 !important;
  border-radius: 14px !important;
  flex-shrink: 0 !important;
  cursor: pointer !important;
  border: 1.5px solid #93C5FD !important;
  background: #FFFFFF !important;
  color: #1E3A8A !important;
}

#cbt-exam-app.cbt-fullscreen-mode .sec-btn.active {
  background: #1E3A8A !important;
  color: #FFFFFF !important;
  border-color: #1E3A8A !important;
  box-shadow: 0 2px 6px rgba(30, 58, 138, 0.3) !important;
}

/* SVG Centering & Overflow Protection (Prevents Right Floating & Label Clipping) */
#cbt-exam-app .q-diagram,
#cbt-exam-app .q-diagram-svg,
#cbt-exam-app .q-card-main svg,
#cbt-exam-app svg {
  display: block !important;
  margin: 14px auto !important;
  text-align: center !important;
  float: none !important;
  clear: both !important;
  max-width: 100% !important;
  height: auto !important;
  overflow: visible !important;
}


/* ==========================================================================
   FAST MOBILE TOUCH RESPONSIVENESS & FULLSCREEN STABILITY FIXES
   ========================================================================== */
#cbt-exam-app button,
#cbt-exam-app .btn-action,
#cbt-exam-app .btn-nav,
#cbt-exam-app .btn-save-next,
#cbt-exam-app .btn-fullscreen,
#cbt-exam-app .btn-palette-toggle,
#cbt-exam-app .sec-btn,
#cbt-exam-app .opt-label,
#cbt-exam-app .q-cell {
  touch-action: manipulation !important;
  -webkit-tap-highlight-color: transparent !important;
  cursor: pointer !important;
}

html.cbt-fs-lock,
body.cbt-fs-lock {
  overflow: hidden !important;
  height: 100% !important;
  width: 100% !important;
}

#cbt-exam-app .cbt-palette-backdrop {
  display: none !important;
  pointer-events: none !important;
  position: fixed !important;
  top: 0 !important; left: 0 !important; right: 0 !important; bottom: 0 !important;
  background: rgba(15, 23, 42, 0.65) !important;
  backdrop-filter: blur(2px) !important;
  z-index: 99999999 !important;
}

#cbt-exam-app.cbt-palette-open {
  overflow: visible !important;
}
#cbt-exam-app.cbt-palette-open .cbt-palette-backdrop {
  display: block !important;
  pointer-events: auto !important;
}

@media (max-width: 900px) {
  /* Provide ample bottom clearance so sticky floating bars (social share, WhatsApp widgets) never block CBT action buttons */
  #cbt-exam-app .main-panel {
    padding-bottom: 80px !important;
  }
}


/* ROCK-SOLID CLICKABILITY FOR HEADER ACTION BUTTONS */
#cbt-exam-app .user-timer-box {
  position: relative !important;
  z-index: 100000010 !important;
}
#cbt-exam-app .btn-fullscreen,
#cbt-exam-app .btn-palette-toggle,
#cbt-exam-app #btnFullscreen,
#cbt-exam-app #btnPaletteToggle,
#cbt-exam-app #btnCalculator {
  position: relative !important;
  z-index: 100000015 !important;
  cursor: pointer !important;
  pointer-events: auto !important;
  user-select: none !important;
  -webkit-tap-highlight-color: transparent !important;
}
#cbt-exam-app .btn-fullscreen *,
#cbt-exam-app .btn-palette-toggle * {
  pointer-events: none !important;
}



/* =========================================================================
   ULTRA-RELIABLE PALETTE DRAWER (MOBILE) & SIDEBAR (DESKTOP)
   ========================================================================= */
@media (max-width: 900px) {
  #cbt-exam-app .palette-panel {
    display: none !important;
  }
  #cbt-exam-app.cbt-palette-open .palette-panel {
    display: flex !important;
    position: fixed !important;
    top: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 86% !important;
    max-width: 360px !important;
    height: 100vh !important;
    height: 100dvh !important;
    background: #FFFFFF !important;
    z-index: 2147483647 !important;
    box-shadow: -6px 0 30px rgba(0, 0, 0, 0.5) !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    border-left: 2px solid var(--cbt-border) !important;
    animation: cbtSlideInRight 0.22s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }
  #cbt-exam-app .cbt-palette-backdrop {
    display: none !important;
    position: fixed !important;
    top: 0 !important; left: 0 !important; right: 0 !important; bottom: 0 !important;
    background: rgba(15, 23, 42, 0.7) !important;
    backdrop-filter: blur(2px) !important;
    z-index: 2147483640 !important;
  }
  #cbt-exam-app.cbt-palette-open .cbt-palette-backdrop {
    display: block !important;
    pointer-events: auto !important;
  }
}

@media (min-width: 901px) {
  #cbt-exam-app .palette-panel {
    display: flex !important;
    width: 310px !important;
    position: static !important;
    height: auto !important;
  }
  #cbt-exam-app.cbt-palette-closed .palette-panel {
    display: none !important;
  }
  #cbt-exam-app .cbt-palette-backdrop {
    display: none !important;
  }
}

/* Clean Section Active Button Color Guard */
#cbt-exam-app .sec-btn.active,
#cbt-exam-app.cbt-fullscreen-mode .sec-btn.active {
  background: var(--cbt-primary) !important;
  color: #FFFFFF !important;
  border-color: var(--cbt-primary) !important;
  box-shadow: 0 2px 5px rgba(30, 58, 138, 0.35) !important;
}


/* Accessible Search Engine Outline: Zero visual clutter for users, 100% indexable for Google */
.cbt-seo-container,
#cbt-exam-app ~ .cbt-seo-container {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  clip-path: inset(50%) !important;
  white-space: normal !important;
  border: 0 !important;
}

/* Automatic Palette Suppression when Scorecard Result Modal is Active */
#cbt-exam-app.cbt-results-active .palette-panel,
#cbt-exam-app.cbt-results-active .cbt-palette-backdrop,
#cbt-exam-app.cbt-results-active .btn-palette-toggle {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

#cbt-exam-app .modal-overlay#resultModal {
  z-index: 2147483647 !important;
}

#resultModal .modal-card {
  margin-top: 20px !important;
  max-height: 90vh !important;
  overflow-y: auto !important;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4) !important;
}