/* ================================
   exam.css
================================= */
.breadcrumb-bar{background:var(--bg-surface);border-bottom:1px solid var(--border);padding:10px 0}
.breadcrumb-inner{max-width:1400px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:6px}
.bc-link{font-size:13px;color:var(--text-muted);transition:color .15s}
.bc-link:hover{color:var(--primary)}
.bc-current{font-size:13px;font-weight:600;color:var(--text-primary)}
.breadcrumb-inner svg{color:var(--text-muted);flex-shrink:0}
.exam-main{min-height:calc(100vh - 120px);background:var(--bg-main);padding:32px 0 60px}
.exam-page-inner{max-width:1400px;margin:0 auto;padding:0 20px}
.exam-page-header{display:flex;align-items:center;margin-bottom:28px;gap:16px;flex-wrap:wrap}
.exam-page-left{display:flex;align-items:center;gap:18px}
.exam-page-icon{width:64px;height:64px;border-radius:16px;background:var(--primary-light);border:2px solid var(--border-blue);display:flex;align-items:center;justify-content:center;font-size:32px;flex-shrink:0}
.exam-page-title{font-size:28px;font-weight:800;color:var(--text-primary);letter-spacing:-.5px;margin-bottom:4px}
.exam-page-subtitle{font-size:14px;color:var(--text-muted);margin-bottom:10px}
.exam-page-meta{display:flex;gap:8px;flex-wrap:wrap}
.meta-chip{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;color:var(--text-secondary);background:var(--bg-surface);border:1px solid var(--border);padding:4px 10px;border-radius:20px}
.meta-chip svg{color:var(--primary)}
.exam-tabs{display:flex;gap:4px;border-bottom:2px solid var(--border);margin-bottom:28px}
.exam-tab{display:flex;align-items:center;gap:7px;padding:10px 20px;font-size:14px;font-weight:600;color:var(--text-muted);border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .2s;border-radius:6px 6px 0 0}
.exam-tab:hover{color:var(--primary);background:var(--primary-light)}
.exam-tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-count{font-size:11px;font-weight:700;background:var(--primary);color:#fff;padding:2px 7px;border-radius:20px}
.tab-content{display:none}
.tab-content.active{display:block}
.subject-cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.subject-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:16px;padding:24px 20px;cursor:pointer;transition:all .25s ease;display:flex;flex-direction:column;gap:14px;position:relative;overflow:hidden}
.subject-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;border-radius:16px 16px 0 0}
.subject-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--border-blue)}
.subject-card-top{display:flex;align-items:center;gap:14px}
.subject-card-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;flex-shrink:0}
.subject-card-name{font-size:17px;font-weight:800;color:var(--text-primary)}
.subject-card-chapters{font-size:12px;color:var(--text-muted);font-weight:500;margin-top:2px}
.subject-card-stats{display:flex;gap:12px}
.subject-stat{display:flex;flex-direction:column;gap:2px}
.subject-stat-num{font-size:18px;font-weight:800;color:var(--primary);line-height:1}
.subject-stat-label{font-size:11px;color:var(--text-muted);font-weight:500}
.subject-card-arrow{position:absolute;bottom:18px;right:18px;color:var(--text-muted);transition:transform .2s,color .2s}
.subject-card:hover .subject-card-arrow{transform:translateX(4px);color:var(--primary)}
.scard-physics::before{background:linear-gradient(90deg,#3b82f6,#60a5fa)}
.scard-physics .subject-card-icon{background:#dbeafe}
.scard-chemistry::before{background:linear-gradient(90deg,#10b981,#34d399)}
.scard-chemistry .subject-card-icon{background:#d1fae5}
.scard-maths::before{background:linear-gradient(90deg,#8b5cf6,#a78bfa)}
.scard-maths .subject-card-icon{background:#ede9fe}
.scard-biology::before{background:linear-gradient(90deg,#f59e0b,#fbbf24)}
.scard-biology .subject-card-icon{background:#fef3c7}
.scard-bengali::before{background:linear-gradient(90deg,#ef4444,#f87171)}
.scard-bengali .subject-card-icon{background:#fee2e2}
.scard-english::before{background:linear-gradient(90deg,#06b6d4,#22d3ee)}
.scard-english .subject-card-icon{background:#cffafe}
.scard-gs::before{background:linear-gradient(90deg,#f97316,#fb923c)}
.scard-gs .subject-card-icon{background:#ffedd5}
.scard-default::before{background:linear-gradient(90deg,#6366f1,#818cf8)}
.scard-default .subject-card-icon{background:#e0e7ff}
.bookmarks-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;gap:10px;text-align:center}
.empty-icon{font-size:48px;margin-bottom:8px}
.bookmarks-empty p{font-size:17px;font-weight:700;color:var(--text-secondary)}
.bookmarks-empty span{font-size:13px;color:var(--text-muted);max-width:300px}
.subject-page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:16px;flex-wrap:wrap}
.subject-page-left{display:flex;align-items:center;gap:16px}
.subject-page-icon{width:56px;height:56px;border-radius:14px;background:var(--primary-light);border:2px solid var(--border-blue);display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0}
.subject-page-title{font-size:24px;font-weight:800;color:var(--text-primary);letter-spacing:-.3px;margin-bottom:4px}
.subject-page-sub{font-size:13px;color:var(--text-muted)}
.syllabus-btn{display:inline-flex;align-items:center;gap:7px;padding:9px 18px;background:var(--bg-surface);border:1.5px solid var(--border);border-radius:8px;font-size:13px;font-weight:600;color:var(--text-secondary);transition:all .2s;white-space:nowrap}
.syllabus-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.chapter-filter-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-surface);border:1px solid var(--border);border-radius:10px;margin-bottom:24px;flex-wrap:wrap}
.filter-label{font-size:13px;font-weight:600;color:var(--text-secondary);white-space:nowrap}
.filter-btns{display:flex;gap:6px}
.filter-btn{padding:5px 12px;font-size:12.5px;font-weight:600;color:var(--text-secondary);background:var(--bg-card);border:1px solid var(--border);border-radius:6px;transition:all .2s}
.filter-btn:hover{border-color:var(--primary);color:var(--primary)}
.filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.chapter-count-label{margin-left:auto;font-size:12px;color:var(--text-muted);font-weight:500}
.chapters-container{display:flex;flex-direction:column;gap:28px}
.unit-title{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:1.2px;color:var(--text-muted);padding:0 0 10px;margin-bottom:8px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}
.unit-title::before{content:'';display:inline-block;width:20px;height:2px;background:var(--primary);border-radius:2px}
.chapter-row{display:flex;align-items:center;gap:14px;padding:14px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:10px;cursor:pointer;transition:all .2s;margin-bottom:6px}
.chapter-row:hover{border-color:var(--border-blue);background:var(--primary-light);transform:translateX(4px)}
.chapter-row:last-child{margin-bottom:0}
.chapter-num{width:26px;height:26px;border-radius:6px;background:var(--bg-surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:var(--text-muted);flex-shrink:0}
.chapter-name{flex:1;font-size:14.5px;font-weight:600;color:var(--text-primary)}
.chapter-tags{display:flex;align-items:center;gap:6px;flex-shrink:0}
.chapter-status{font-size:10px;font-weight:700;padding:2px 8px;border-radius:20px;text-transform:uppercase;letter-spacing:.3px}
.status-active{background:#d1fae5;color:#065f46}
.status-reduced{background:#fef3c7;color:#92400e}
.status-removed{background:#fee2e2;color:#991b1b}
.chapter-weightage{font-size:10.5px;font-weight:700;padding:2px 8px;border-radius:20px}
.weight-high{background:#dbeafe;color:#1e40af}
.weight-medium{background:#ede9fe;color:#5b21b6}
.weight-low{background:#f3f4f6;color:#6b7280}
.chapter-qcount{font-size:12px;font-weight:700;color:var(--text-muted);background:var(--bg-surface);padding:3px 10px;border-radius:20px;border:1px solid var(--border);white-space:nowrap}
.chapter-arrow{color:var(--text-muted);transition:transform .2s;flex-shrink:0}
.chapter-row:hover .chapter-arrow{transform:translateX(4px);color:var(--primary)}
.questions-header-bar{background:var(--bg-card);border-bottom:1px solid var(--border);padding:16px 0;position:sticky;top:64px;z-index:50;box-shadow:var(--shadow-sm)}
.questions-header-inner{max-width:1400px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.qh-title{font-size:20px;font-weight:800;color:var(--text-primary);letter-spacing:-.3px;margin-bottom:5px}
.qh-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.qh-chip{font-size:12px;font-weight:600;color:var(--text-secondary);background:var(--bg-surface);border:1px solid var(--border);padding:3px 10px;border-radius:20px}
.qh-count{color:var(--primary);background:var(--primary-light);border-color:var(--border-blue)}
.qh-right{display:flex;gap:8px;flex-shrink:0}
.qh-btn{display:flex;align-items:center;gap:6px;padding:8px 14px;background:var(--bg-surface);border:1.5px solid var(--border);border-radius:8px;font-size:13px;font-weight:600;color:var(--text-secondary);transition:all .2s;white-space:nowrap}
.qh-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.qh-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.qh-btn#showBookmarkedBtn{position:relative}
.qh-btn-badge{position:absolute;top:-7px;right:-7px;min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:#ef4444;color:#fff;font-size:11px;font-weight:700;line-height:18px;text-align:center;border:2px solid var(--bg-primary)}
.filter-panel{background:var(--bg-surface);border-bottom:1px solid var(--border);max-height:0;overflow:hidden;transition:max-height .3s ease}
.filter-panel.open{max-height:200px}
.filter-panel-inner{max-width:1400px;margin:0 auto;padding:16px 20px;display:flex;align-items:flex-start;gap:28px;flex-wrap:wrap}
.fp-group{display:flex;flex-direction:column;gap:8px}
.fp-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted)}
.fp-options{display:flex;gap:6px;flex-wrap:wrap}
.fp-opt{padding:5px 12px;font-size:12.5px;font-weight:600;color:var(--text-secondary);background:var(--bg-card);border:1px solid var(--border);border-radius:6px;transition:all .2s}
.fp-opt:hover{border-color:var(--primary);color:var(--primary)}
.fp-opt.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.fp-clear{margin-left:auto;align-self:flex-end;padding:6px 14px;font-size:12px;font-weight:600;color:var(--wrong);background:#fee2e2;border:1px solid #fecaca;border-radius:6px;transition:all .2s}
.fp-clear:hover{background:var(--wrong);color:#fff}
.questions-main{padding:28px 0 60px}
.questions-inner{max-width:900px;margin:0 auto;padding:0 20px}
.year-group{margin-bottom:36px}
.year-divider{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.year-label{font-size:13px;font-weight:800;color:var(--primary);background:var(--primary-light);border:1.5px solid var(--border-blue);padding:4px 14px;border-radius:20px;white-space:nowrap}
.year-line{flex:1;height:1px;background:var(--border)}
.year-qcount{font-size:11px;color:var(--text-muted);font-weight:600;white-space:nowrap}
.question-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:12px;transition:border-color .2s}
.question-card:hover{border-color:var(--border-blue)}
.question-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}
.question-num-text{display:flex;align-items:flex-start;gap:10px;flex:1}
.question-num{width:26px;height:26px;border-radius:6px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0;margin-top:1px}
.question-text{font-size:15px;color:var(--text-primary);line-height:1.65;font-weight:500;flex:1}
.question-bookmark-btn{width:32px;height:32px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--text-muted);background:var(--bg-surface);border:1px solid var(--border);transition:all .2s}
.question-bookmark-btn:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-light)}
.question-bookmark-btn.bookmarked{color:var(--primary);background:var(--primary-light);border-color:var(--primary)}
.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:14px}
.option-item{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border-radius:8px;border:1.5px solid var(--border);background:var(--bg-surface);cursor:pointer;transition:all .2s;font-size:14px;color:var(--text-primary)}
.option-item:hover{border-color:var(--primary);background:var(--primary-light)}
.option-item.correct{border-color:var(--correct);background:#f0fdf4;color:#166534}
.option-item.wrong{border-color:var(--wrong);background:#fef2f2;color:#991b1b}
.option-letter{width:22px;height:22px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;background:var(--bg-card);border:1px solid var(--border);color:var(--text-muted)}
.option-item.correct .option-letter{background:var(--correct);color:#fff;border-color:var(--correct)}
.option-item.wrong .option-letter{background:var(--wrong);color:#fff;border-color:var(--wrong)}
.question-footer{display:flex;align-items:center;justify-content:space-between;gap:10px}
.show-answer-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 16px;background:var(--primary);color:#fff;font-size:13px;font-weight:600;border-radius:7px;transition:all .2s}
.show-answer-btn:hover{background:var(--primary-dark)}
.show-answer-btn.revealed{background:var(--bg-surface);color:var(--text-muted);border:1px solid var(--border)}
.explanation-box{margin-top:14px;padding:14px;background:#f0fdf4;border:1.5px solid #86efac;border-radius:8px;display:none}
.explanation-box.show{display:block}
.explanation-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--correct);margin-bottom:6px}
.explanation-text{font-size:13.5px;color:#166534;line-height:1.65}
.q-empty-state,.q-no-results{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 20px;gap:10px;text-align:center}
.q-empty-state p,.q-no-results p{font-size:17px;font-weight:700;color:var(--text-secondary)}
.q-empty-state span,.q-no-results span{font-size:13px;color:var(--text-muted)}
@media(max-width:768px){.exam-page-title{font-size:22px}.subject-cards-grid{grid-template-columns:1fr 1fr}.options-grid{grid-template-columns:1fr}.questions-header-inner{flex-direction:column;align-items:flex-start;gap:10px}.qh-right{width:100%}.qh-btn{flex:1;justify-content:center}.chapter-filter-bar{flex-direction:column;align-items:flex-start}.chapter-count-label{margin-left:0}.subject-page-header{flex-direction:column;align-items:flex-start}}
@media(max-width:520px){.subject-cards-grid{grid-template-columns:1fr}.exam-page-left{flex-direction:column;align-items:flex-start}.exam-tabs{overflow-x:auto}.question-text{font-size:14px}}
/* ================================
   QUESTION TYPE BANNER
================================= */
.qtype-banner {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 12px;
  border-left: 4px solid;
}
.qtype-banner-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.qtype-banner-desc {
  font-size: 11.5px;
  font-weight: 500;
  opacity: 0.85;
}

/* Single Correct */
.qtype-mcq {
  background: #dbeafe;
  border-color: #2563eb;
  color: #1e40af;
}

/* Multiple Correct */
.qtype-multi {
  background: #ffedd5;
  border-color: #ea580c;
  color: #c2410c;
}

/* Numerical */
.qtype-numerical {
  background: #f3e8ff;
  border-color: #9333ea;
  color: #7e22ce;
}

/* ================================
   NUMERICAL INPUT
================================= */
.numerical-input-wrap {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  align-items: center;
}
.numerical-input {
  flex: 1;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: var(--bg-surface);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}
.numerical-input:focus { border-color: var(--primary); }
.numerical-input.correct {
  border-color: var(--correct);
  background: #f0fdf4;
}
.numerical-input.wrong {
  border-color: var(--wrong);
  background: #fef2f2;
}
.check-num-btn {
  padding: 10px 18px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}
.check-num-btn:hover { background: var(--primary-dark); }
.check-num-btn.correct-btn { background: var(--correct); }
.check-num-btn.wrong-btn { background: var(--wrong); }