*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #eff6ff;--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--text: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--bg: #f8fafc;--card-bg: #ffffff;--radius: 12px;--shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06)}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.main-content{max-width:1100px;margin:0 auto;padding:2rem 1rem;min-height:calc(100vh - 64px)}.page{width:100%}.loading{text-align:center;padding:4rem;color:var(--text-muted);font-size:1.1rem}.empty-state{text-align:center;padding:3rem;color:var(--text-muted)}.empty-state p{margin-bottom:1rem}.navbar{background:var(--card-bg);border-bottom:1px solid var(--border);padding:0 1.5rem;height:64px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}.navbar-brand a{font-size:1.25rem;font-weight:700;color:var(--primary);text-decoration:none}.navbar-links{display:flex;align-items:center;gap:1.5rem}.navbar-links a{color:var(--text);font-weight:500;font-size:.95rem;text-decoration:none;transition:color .2s}.navbar-links a:hover{color:var(--primary)}.btn-link{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.95rem;font-weight:500;padding:0}.btn-link:hover{color:var(--danger)}.menu-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}.btn-primary{background:var(--primary);color:#fff;border:none;padding:.6rem 1.4rem;border-radius:8px;font-weight:600;font-size:.95rem;cursor:pointer;text-decoration:none;display:inline-block;transition:background .2s,transform .1s}.btn-primary:hover{background:var(--primary-dark);text-decoration:none;color:#fff}.btn-primary:active{transform:scale(.98)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary);padding:.55rem 1.3rem;border-radius:8px;font-weight:600;font-size:.95rem;cursor:pointer;text-decoration:none;display:inline-block;transition:all .2s}.btn-outline:hover{background:var(--primary-light);text-decoration:none}.btn-success{background:var(--success);color:#fff;border:none;padding:.6rem 1.4rem;border-radius:8px;font-weight:600;font-size:.95rem;cursor:pointer;transition:opacity .2s}.btn-success:hover{opacity:.9}.btn-success:disabled{opacity:.6;cursor:not-allowed}.btn-full{width:100%;text-align:center}.btn-lg{padding:.8rem 2rem;font-size:1.05rem}.btn-sm{padding:.35rem .85rem;font-size:.85rem}.form-group{margin-bottom:1.2rem}.form-group label{display:block;font-weight:600;margin-bottom:.4rem;font-size:.9rem;color:var(--text-muted)}.form-group input,select,input[type=text],input[type=email],input[type=password],input[type=tel]{width:100%;padding:.65rem .9rem;border:1.5px solid var(--border);border-radius:8px;font-size:1rem;background:var(--card-bg);color:var(--text);transition:border-color .2s}input:focus,select:focus{outline:none;border-color:var(--primary)}.alert{padding:.8rem 1rem;border-radius:8px;margin-bottom:1rem;font-size:.95rem}.alert-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c}.alert-info{background:#eff6ff;border:1px solid #bfdbfe;color:#1d4ed8}.alert-success{background:#f0fdf4;border:1px solid #bbf7d0;color:#15803d}.badge{display:inline-block;padding:.2rem .6rem;border-radius:100px;font-size:.78rem;font-weight:600;background:var(--primary-light);color:var(--primary);margin-right:.4rem}.badge-secondary{background:#f1f5f9;color:var(--text-muted)}.badge-admin{background:#fef3c7;color:#92400e}.page-header{margin-bottom:2rem}.page-header h1{font-size:2rem;font-weight:700;margin-bottom:.4rem}.page-header p{color:var(--text-muted)}.breadcrumb{font-size:.88rem;color:var(--text-muted);margin-bottom:1rem}.breadcrumb a{color:var(--primary)}.hero{text-align:center;padding:4rem 1rem;background:linear-gradient(135deg,#eff6ff,#e0f2fe);border-radius:var(--radius);margin-bottom:3rem}.hero h1{font-size:2.8rem;font-weight:800;margin-bottom:1rem;color:var(--text)}.hero p{font-size:1.15rem;color:var(--text-muted);max-width:560px;margin:0 auto 2rem}.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem;margin-bottom:3rem}.feature-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;text-align:center;box-shadow:var(--shadow);cursor:pointer;text-decoration:none;color:inherit;display:block;transition:transform .15s,box-shadow .15s}.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);text-decoration:none}.feature-icon{font-size:2.5rem;display:block;margin-bottom:.75rem}.feature-card h3{font-size:1.05rem;margin-bottom:.5rem}.feature-card p{color:var(--text-muted);font-size:.9rem}.welcome-back{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;text-align:center}.welcome-back h2{margin-bottom:1.5rem}.quick-links{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.auth-page{display:flex;align-items:center;justify-content:center;min-height:70vh}.auth-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:2.5rem;width:100%;max-width:440px;box-shadow:var(--shadow-md)}.auth-card h2{margin-bottom:1.5rem;font-size:1.5rem}.auth-footer{text-align:center;color:var(--text-muted);font-size:.9rem;margin-top:1.5rem}.search-bar{margin-bottom:1.5rem}.search-bar input{max-width:400px}.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.25rem}.category-card{display:flex;align-items:flex-start;gap:1rem;background:var(--card-bg);border:2px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-decoration:none;color:var(--text);transition:box-shadow .2s,transform .15s;box-shadow:var(--shadow)}.category-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);text-decoration:none;color:var(--text)}.category-icon{width:48px;height:48px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;flex-shrink:0;color:#fff}.category-info h3{font-size:1rem;margin-bottom:.2rem}.category-info .nepali{color:var(--text-muted);font-size:.9rem;margin-bottom:.3rem}.category-info .desc{color:var(--text-muted);font-size:.85rem;margin-bottom:.5rem}.topic-count{font-size:.8rem;color:var(--primary);font-weight:600}.topics-list{display:flex;flex-direction:column;gap:1rem}.topic-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem 1.5rem;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow);gap:1rem}.topic-info h3{font-size:1rem;margin-bottom:.3rem}.topic-info .nepali{color:var(--text-muted);font-size:.88rem}.topic-excerpt{color:var(--text-muted);font-size:.85rem;margin:.3rem 0 .5rem}.topic-actions{display:flex;gap:.5rem;flex-shrink:0}.topic-detail-header{margin-bottom:2rem}.topic-detail-header h1{font-size:2rem;margin-bottom:.5rem}.topic-meta{margin-top:.5rem}.topic-content{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.5rem}.topic-content h3{margin-bottom:.75rem;color:var(--text-muted);font-size:.9rem;text-transform:uppercase;letter-spacing:.05em}.topic-content p{color:var(--text);line-height:1.8}.topic-quiz-cta{background:linear-gradient(135deg,#eff6ff,#e0f2fe);border-radius:var(--radius);padding:2rem;text-align:center;margin-top:2rem}.topic-quiz-cta h3{margin-bottom:1rem}.quiz-options{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.quiz-page{max-width:720px;margin:0 auto}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.quiz-topic{font-weight:600;font-size:1rem}.quiz-timer{font-weight:700;font-size:1.1rem;color:var(--primary);background:var(--primary-light);padding:.3rem .8rem;border-radius:100px}.quiz-timer.urgent{color:var(--danger);background:#fef2f2}.quiz-progress-text{font-size:.88rem;color:var(--text-muted)}.quiz-progress-bar{height:6px;background:var(--border);border-radius:100px;margin-bottom:1.5rem;overflow:hidden}.quiz-progress-fill{height:100%;background:var(--primary);border-radius:100px;transition:width .3s ease}.quiz-question-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin-bottom:1.5rem;box-shadow:var(--shadow)}.question-meta{margin-bottom:1rem}.difficulty{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:.2rem .6rem;border-radius:100px}.difficulty-easy{background:#d1fae5;color:#065f46}.difficulty-medium{background:#fef3c7;color:#92400e}.difficulty-hard{background:#fee2e2;color:#991b1b}.question-text{font-size:1.1rem;font-weight:500;line-height:1.7;margin-bottom:1.5rem}.options-list{display:flex;flex-direction:column;gap:.75rem}.option-btn{display:flex;align-items:center;gap:1rem;padding:.85rem 1.2rem;border:2px solid var(--border);border-radius:10px;background:var(--card-bg);cursor:pointer;text-align:left;font-size:.95rem;transition:all .15s;width:100%}.option-btn:hover,.option-btn.selected{border-color:var(--primary);background:var(--primary-light)}.option-key{width:32px;height:32px;border-radius:8px;background:var(--border);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0}.option-btn.selected .option-key{background:var(--primary);color:#fff}.option-text{flex:1}.quiz-nav{display:flex;justify-content:space-between;align-items:center;gap:1rem}.question-dots{display:flex;gap:.4rem;flex-wrap:wrap;justify-content:center}.dot{width:10px;height:10px;border-radius:50%;border:2px solid var(--border);background:var(--card-bg);cursor:pointer;padding:0;transition:all .15s}.dot.answered{background:var(--primary-light);border-color:var(--primary)}.dot.active{background:var(--primary);border-color:var(--primary)}.result-summary{text-align:center;padding:2.5rem 2rem;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:2rem;box-shadow:var(--shadow-md)}.score-circle{width:120px;height:120px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0 auto 1.5rem;border:6px solid}.score-circle.pass{border-color:var(--success);background:#f0fdf4}.score-circle.fail{border-color:var(--danger);background:#fef2f2}.score-value{font-size:1.6rem;font-weight:800;line-height:1}.score-label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-top:2px}.score-circle.pass .score-value,.score-circle.pass .score-label{color:var(--success)}.score-circle.fail .score-value,.score-circle.fail .score-label{color:var(--danger)}.result-summary h2{font-size:1.5rem;margin-bottom:.3rem}.topic-name{color:var(--text-muted);margin-bottom:1.5rem}.result-stats{display:flex;justify-content:center;gap:2rem;margin-bottom:2rem;flex-wrap:wrap}.stat{display:flex;flex-direction:column;align-items:center}.stat-value{font-size:1.5rem;font-weight:700}.stat-label{font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.result-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.answer-review{margin-top:1rem}.answer-review h3{margin-bottom:1rem}.answer-item{background:var(--card-bg);border-left:4px solid var(--border);border-radius:0 8px 8px 0;padding:1rem 1.25rem;margin-bottom:.75rem;border:1px solid var(--border)}.answer-item.correct{border-left-color:var(--success);background:#f0fdf4}.answer-item.incorrect{border-left-color:var(--danger);background:#fef2f2}.answer-item .q-num{font-weight:600;margin-bottom:.4rem}.answer-item p{font-size:.9rem;margin-bottom:.2rem}.explanation{color:var(--text-muted);font-style:italic;margin-top:.4rem}.results-summary-bar{display:flex;gap:2rem;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem 2rem;margin-bottom:1.5rem;flex-wrap:wrap}.results-list{display:flex;flex-direction:column;gap:1rem}.result-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem 1.5rem;box-shadow:var(--shadow)}.result-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}.result-card-header h3{font-size:1rem;margin-bottom:.3rem}.result-card-stats{display:flex;gap:1.25rem;font-size:.88rem;color:var(--text-muted);margin-bottom:.75rem;flex-wrap:wrap}.score-badge{font-weight:700;font-size:1.1rem;padding:.25rem .75rem;border-radius:8px;flex-shrink:0}.score-badge.pass{background:#d1fae5;color:#065f46}.score-badge.fail{background:#fee2e2;color:#991b1b}.result-progress{height:6px;background:var(--border);border-radius:100px;overflow:hidden;margin-bottom:.75rem}.result-progress-fill{height:100%;border-radius:100px;transition:width .5s}.profile-container{display:grid;grid-template-columns:300px 1fr;gap:1.5rem;align-items:start}.profile-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;text-align:center;box-shadow:var(--shadow)}.avatar{width:80px;height:80px;border-radius:50%;background:var(--primary);color:#fff;font-size:2rem;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 1rem}.profile-card h2{margin-bottom:.3rem}.profile-email,.profile-phone{color:var(--text-muted);font-size:.9rem}.stats-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow)}.stats-card h3{margin-bottom:1.5rem}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:2rem}.stat-item{background:var(--bg);border-radius:10px;padding:1.25rem;text-align:center}.stat-number{display:block;font-size:2rem;font-weight:800;color:var(--primary)}.stat-desc{font-size:.85rem;color:var(--text-muted)}.profile-actions{display:flex;gap:1rem;flex-wrap:wrap}.leaderboard-filters{display:flex;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}.leaderboard-filters select{padding:.6rem 1rem;border:1.5px solid var(--border);border-radius:8px;font-size:.95rem;background:var(--card-bg);color:var(--text);min-width:200px}.leaderboard-table{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.leaderboard-header-row{display:grid;grid-template-columns:60px 1fr 120px 200px;padding:.85rem 1.5rem;background:var(--bg);border-bottom:1px solid var(--border);font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.leaderboard-row{display:grid;grid-template-columns:60px 1fr 120px 200px;padding:1rem 1.5rem;border-bottom:1px solid var(--border);align-items:center;transition:background .15s}.leaderboard-row:last-child{border-bottom:none}.leaderboard-row:hover{background:var(--bg)}.leaderboard-row.top-three{background:#fffbeb}.rank{font-size:1.3rem}.lb-name{font-weight:600}.lb-quizzes{color:var(--text-muted);font-size:.88rem}.lb-score-wrap{display:flex;align-items:center;gap:.75rem}.lb-score-bar{flex:1;height:8px;background:var(--border);border-radius:100px;overflow:hidden}.lb-score-fill{height:100%;background:var(--primary);border-radius:100px}.lb-score{font-weight:700;font-size:.9rem;min-width:45px}.search-form{display:flex;gap:.75rem;margin-bottom:1.5rem}.search-form input{flex:1;max-width:500px}.search-count{color:var(--text-muted);font-size:.9rem;margin-bottom:1rem}@media(max-width:768px){.menu-toggle{display:block}.navbar-links{display:none;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--card-bg);border-bottom:1px solid var(--border);padding:1rem 1.5rem;gap:1rem;box-shadow:var(--shadow-md);align-items:flex-start}.navbar-links.open{display:flex}.hero h1{font-size:2rem}.profile-container{grid-template-columns:1fr}.leaderboard-header-row,.leaderboard-row{grid-template-columns:50px 1fr 100px}.lb-score-wrap{display:none}.topic-card{flex-direction:column;align-items:flex-start}.topic-actions{width:100%}.quiz-nav{flex-wrap:wrap}.question-dots{order:3;width:100%}.result-stats{gap:1rem}}.page-header{margin-bottom:1.5rem}.page-header h1{font-size:1.8rem;font-weight:700;margin-bottom:.25rem}.page-subtitle{color:var(--text-muted);font-size:1rem}.result-count{color:var(--text-muted);font-size:.9rem;margin-bottom:1rem}.back-link{display:inline-block;color:var(--text-muted);font-size:.9rem;margin-bottom:1.25rem}.back-link:hover{color:var(--primary)}.filter-bar{display:flex;gap:.75rem;margin-bottom:1.5rem;flex-wrap:wrap;align-items:center}.filter-bar.wrap{flex-wrap:wrap}.search-input{flex:1;min-width:200px;padding:.6rem 1rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem;background:var(--card-bg)}.filter-select{padding:.6rem 1rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.9rem;background:var(--card-bg);cursor:pointer}.nav-dropdown{position:relative}.nav-dropdown-trigger{background:none;border:none;color:var(--text);font-weight:500;font-size:.95rem;cursor:pointer;padding:0}.nav-dropdown-trigger:hover{color:var(--primary)}.nav-dropdown-menu{position:absolute;top:calc(100% + .5rem);left:0;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md);min-width:200px;z-index:200;display:flex;flex-direction:column;overflow:hidden}.nav-dropdown-menu a{padding:.75rem 1rem;color:var(--text);font-size:.9rem;border-bottom:1px solid var(--border);text-decoration:none}.nav-dropdown-menu a:last-child{border-bottom:none}.nav-dropdown-menu a:hover{background:var(--primary-light);color:var(--primary)}.quick-access-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;margin-bottom:2rem}.quick-card{display:flex;align-items:flex-start;gap:1rem;padding:1.25rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--card-bg);text-decoration:none;color:var(--text);transition:transform .15s,box-shadow .15s}.quick-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);text-decoration:none}.quick-icon{font-size:2rem;line-height:1}.quick-card h3{font-size:1rem;font-weight:600;margin-bottom:.25rem}.quick-card p{font-size:.85rem;color:var(--text-muted);margin:0}.past-q-card{border-left:3px solid #6366f1}.ebook-card{border-left:3px solid #10b981}.reading-card{border-left:3px solid #f59e0b}.quiz-card{border-left:3px solid var(--primary)}.sci-card{border-left:3px solid #8b5cf6}.faculty-badge{display:inline-block;background:var(--primary-light);color:var(--primary);padding:.2rem .6rem;border-radius:100px;font-size:.75rem;font-weight:600;text-transform:capitalize;margin-bottom:.5rem}.faculty-badge.large{font-size:.85rem;padding:.3rem .8rem}.faculty-badge.small{font-size:.7rem}.tags{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.5rem}.tag{background:var(--bg);border:1px solid var(--border);color:var(--text-muted);padding:.15rem .5rem;border-radius:100px;font-size:.75rem}.materials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem;margin-bottom:2rem}.material-card{display:flex;flex-direction:column;justify-content:space-between;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-decoration:none;color:var(--text);transition:transform .15s,box-shadow .15s}.material-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);text-decoration:none}.material-card h3{font-size:1rem;font-weight:600;margin-bottom:.25rem}.material-summary{font-size:.85rem;color:var(--text-muted);margin-top:.5rem;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.material-card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:.75rem}.view-count{font-size:.8rem;color:var(--text-muted)}.nepali-title{font-size:.85rem;color:var(--text-muted);margin-bottom:.25rem}.material-detail-page{max-width:780px}.material-header{margin-bottom:2rem;border-bottom:1px solid var(--border);padding-bottom:1.5rem}.material-header h1{font-size:1.7rem;font-weight:700;margin:.5rem 0}.material-meta{display:flex;gap:1rem;color:var(--text-muted);font-size:.85rem;margin:.75rem 0;align-items:center}.source-link{color:var(--primary);text-decoration:none}.material-content{line-height:1.9}.content-heading{font-size:1.1rem;font-weight:700;margin:1.5rem 0 .5rem;color:var(--text)}.content-p{margin-bottom:.5rem}.content-li{margin-left:1.5rem;margin-bottom:.25rem;list-style:disc}.content-hr{border:none;border-top:1px solid var(--border);margin:1rem 0}.content-table-wrap{overflow-x:auto;margin:1rem 0}.content-table{width:100%;border-collapse:collapse;font-size:.9rem}.content-table th{background:var(--primary);color:#fff;padding:.5rem .75rem;text-align:left;white-space:nowrap}.content-table td{padding:.45rem .75rem;border-bottom:1px solid var(--border);vertical-align:top}.content-table tr:nth-child(2n) td{background:var(--bg-secondary, #f8f8f8)}.content-table tr:hover td{background:var(--primary-light, #eef2ff)}.ebooks-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.25rem;margin-bottom:2rem}.ebook-card{display:flex;gap:1rem;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;transition:box-shadow .15s}.ebook-card:hover{box-shadow:var(--shadow-md)}.ebook-cover{width:70px;flex-shrink:0}.ebook-cover img{width:70px;height:90px;object-fit:cover;border-radius:6px}.ebook-cover-placeholder{width:70px;height:90px;background:var(--primary-light);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:2rem}.ebook-info{flex:1;min-width:0}.ebook-info h3{font-size:.95rem;font-weight:600;margin-bottom:.25rem;line-height:1.3}.ebook-author{font-size:.82rem;color:var(--text-muted);margin-bottom:.4rem}.ebook-desc{font-size:.82rem;color:var(--text-muted);margin-bottom:.5rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.ebook-meta{display:flex;flex-wrap:wrap;gap:.4rem;font-size:.78rem;color:var(--text-muted);margin-bottom:.75rem}.ebook-subject{color:var(--primary);font-weight:500}.ebook-footer{display:flex;justify-content:space-between;align-items:center}.download-count{font-size:.78rem;color:var(--text-muted)}.btn-sm{padding:.35rem .75rem;font-size:.82rem}.type-toggle{display:flex;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.type-btn{padding:.5rem 1rem;background:var(--card-bg);border:none;cursor:pointer;font-size:.9rem;color:var(--text-muted);transition:background .15s}.type-btn.active{background:var(--primary);color:#fff;font-weight:600}.past-questions-list{display:flex;flex-direction:column;gap:1rem;margin-bottom:2rem}.past-question-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}.pq-meta{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin-bottom:.75rem;font-size:.8rem}.pq-faculty{background:#f0fdf4;color:#166534;padding:.15rem .5rem;border-radius:100px;font-weight:600;text-transform:capitalize}.pq-year{background:#eff6ff;color:#1d4ed8;padding:.15rem .5rem;border-radius:100px}.pq-source{color:var(--text-muted)}.pq-marks{background:#fef3c7;color:#92400e;padding:.15rem .5rem;border-radius:100px;font-weight:600}.pq-number{font-size:.82rem;color:var(--text-muted);margin-bottom:.25rem}.pq-text{font-size:1rem;font-weight:500;margin-bottom:1rem;line-height:1.6}.pq-options{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1rem}.pq-option{display:flex;gap:.6rem;padding:.6rem .85rem;border:1px solid var(--border);border-radius:8px;font-size:.9rem;align-items:flex-start}.pq-option.correct-answer{border-color:var(--success);background:#f0fdf4;color:#166534;font-weight:500}.opt-key{font-weight:700;flex-shrink:0}.pq-answer-box{background:#f0fdf4;border:1px solid #86efac;border-radius:8px;padding:1rem;margin-bottom:.75rem}.pq-answer-box.error{background:#fef2f2;border-color:#fca5a5;color:var(--danger)}.answer-label{font-weight:600;margin-bottom:.4rem}.answer-explanation{color:var(--text-muted);font-size:.88rem;margin-top:.4rem;font-style:italic}.subjective-answer{font-size:.9rem;line-height:1.8;color:var(--text)}.subjective-answer p{margin-bottom:.25rem}.reveal-btn{background:none;border:1px solid var(--border);border-radius:8px;padding:.45rem 1rem;font-size:.85rem;cursor:pointer;color:var(--primary);font-weight:500;transition:background .15s}.reveal-btn:hover,.reveal-btn.revealed{background:var(--primary-light)}.pagination{display:flex;align-items:center;justify-content:center;gap:1rem;margin-top:2rem}.page-info{color:var(--text-muted);font-size:.9rem}@media(max-width:768px){.quick-access-grid{grid-template-columns:1fr 1fr}.ebooks-grid,.materials-grid{grid-template-columns:1fr}.filter-bar{flex-direction:column}.search-input,.filter-select{width:100%}.nav-dropdown-menu{position:fixed;left:0;right:0;top:64px;border-radius:0}.ebook-card{flex-direction:column}.ebook-cover{width:100%}.ebook-cover img,.ebook-cover-placeholder{width:100%;height:120px}}@media(max-width:480px){.quick-access-grid{grid-template-columns:1fr}}.scientific-names-page{max-width:1100px;margin:0 auto;padding:1rem}.sn-header{text-align:center;margin-bottom:1.5rem}.sn-header h1{font-size:1.8rem;margin-bottom:.25rem}.sn-subtitle{color:var(--text-muted, #666);font-size:.95rem}.sn-search-wrap{display:flex;gap:.75rem;margin-bottom:1rem;flex-wrap:wrap}.sn-search-box{flex:1;min-width:260px;position:relative;display:flex;align-items:center;border:2px solid var(--border);border-radius:8px;background:var(--bg);overflow:hidden;transition:border-color .2s}.sn-search-box:focus-within{border-color:var(--primary)}.sn-search-icon{padding:0 .6rem;font-size:1rem;color:var(--text-muted, #888)}.sn-search-input{flex:1;border:none;background:transparent;padding:.65rem .25rem;font-size:.95rem;color:var(--text);outline:none}.sn-search-clear{background:none;border:none;cursor:pointer;padding:0 .75rem;font-size:1rem;color:var(--text-muted, #888)}.sn-search-clear:hover{color:var(--text)}.sn-origin-select{padding:.65rem 1rem;border:2px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:.9rem;cursor:pointer}.sn-tabs{display:flex;gap:.4rem;flex-wrap:wrap;margin-bottom:1rem;border-bottom:2px solid var(--border);padding-bottom:.5rem}.sn-tab{display:flex;align-items:center;gap:.3rem;padding:.45rem .85rem;border:1px solid var(--border);border-radius:20px;background:var(--bg);color:var(--text);cursor:pointer;font-size:.85rem;transition:all .15s}.sn-tab:hover{border-color:var(--primary);color:var(--primary)}.sn-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.sn-tab-icon{font-size:1rem}.sn-tab-count{background:#00000026;border-radius:10px;padding:0 .4rem;font-size:.75rem}.sn-tab.active .sn-tab-count{background:#ffffff40}.sn-results-info{font-size:.85rem;color:var(--text-muted, #666);margin-bottom:.75rem}.sn-empty{text-align:center;padding:3rem 1rem;color:var(--text-muted, #888)}.sn-table-wrap{overflow-x:auto;border-radius:8px;border:1px solid var(--border)}.sn-table{width:100%;border-collapse:collapse;font-size:.875rem}.sn-table thead{background:var(--primary);color:#fff}.sn-table th{padding:.6rem .85rem;text-align:left;white-space:nowrap;font-weight:600}.sn-table td{padding:.5rem .85rem;border-bottom:1px solid var(--border);vertical-align:middle}.sn-table tr:last-child td{border-bottom:none}.sn-table tr:nth-child(2n) td{background:var(--bg-secondary, #f9f9f9)}.sn-table tr:hover td{background:var(--primary-light, #eef2ff)}.sn-num{color:var(--text-muted, #888);font-size:.8rem;width:40px}.sn-sci{font-style:italic;color:#2563eb}.sn-nepali{font-size:.9rem}.sn-family{font-size:.8rem;color:var(--text-muted, #666)}.sn-origin{font-size:.8rem}.sn-badge{display:inline-block;padding:.15rem .5rem;border-radius:12px;font-size:.75rem;font-weight:500}.sn-cat-plant{background:#dcfce7;color:#166534}.sn-cat-mammal{background:#fef3c7;color:#92400e}.sn-cat-bird{background:#dbeafe;color:#1e40af}.sn-cat-reptile{background:#d1fae5;color:#065f46}.sn-cat-amphibian{background:#e0e7ff;color:#3730a3}.sn-cat-fish{background:#cffafe;color:#155e75}.sn-cat-insect{background:#fce7f3;color:#9d174d}.admin-nav-link{background:linear-gradient(135deg,#7c3aed,#4f46e5)!important;color:#fff!important;padding:5px 12px;border-radius:6px;font-size:.85rem;font-weight:600}.admin-nav-link:hover{opacity:.9}.admin-dashboard{min-height:100vh;background:#0f172a;color:#f1f5f9;padding:24px}.admin-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-bottom:28px}.admin-header h1{font-size:1.8rem;font-weight:700;color:#f1f5f9;margin:0}.admin-header p{color:#64748b;font-size:.85rem;margin:4px 0 0}.admin-tabs{display:flex;gap:8px}.admin-tab{background:#1e293b;border:1px solid #334155;color:#94a3b8;padding:8px 18px;border-radius:8px;cursor:pointer;font-size:.9rem;transition:all .15s}.admin-tab:hover{border-color:#3b82f6;color:#f1f5f9}.admin-tab.active{background:#3b82f6;border-color:#3b82f6;color:#fff;font-weight:600}.admin-loading{display:flex;align-items:center;justify-content:center;gap:12px;padding:60px;color:#64748b;font-size:1rem}.spinner{width:24px;height:24px;border:3px solid #334155;border-top-color:#3b82f6;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.admin-content{display:flex;flex-direction:column;gap:24px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}.stat-card{background:#1e293b;border-radius:12px;padding:20px;display:flex;align-items:flex-start;gap:14px;border:1px solid #334155;transition:transform .15s}.stat-card:hover{transform:translateY(-2px)}.stat-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}.stat-body{flex:1;min-width:0}.stat-value{font-size:1.7rem;font-weight:700;color:#f1f5f9;line-height:1}.stat-label{font-size:.8rem;color:#94a3b8;margin-top:4px;font-weight:500;text-transform:uppercase;letter-spacing:.04em}.stat-sub{font-size:.75rem;color:#64748b;margin-top:3px}.chart-controls{display:flex;align-items:center;gap:8px;color:#64748b;font-size:.85rem}.days-btn{background:#1e293b;border:1px solid #334155;color:#94a3b8;padding:4px 12px;border-radius:6px;cursor:pointer;font-size:.82rem;transition:all .15s}.days-btn:hover{border-color:#3b82f6;color:#f1f5f9}.days-btn.active{background:#3b82f6;border-color:#3b82f6;color:#fff}.chart-section{background:#1e293b;border:1px solid #334155;border-radius:14px;padding:24px}.chart-section h2{font-size:1rem;font-weight:600;color:#f1f5f9;margin:0 0 4px}.chart-desc{font-size:.8rem;color:#64748b;margin:0 0 18px}.chart-row-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}.topic-bars{display:flex;flex-direction:column;gap:10px}.topic-bar-row{display:grid;grid-template-columns:28px 1fr 200px 80px 60px;align-items:center;gap:12px;font-size:.85rem}.topic-rank{color:#64748b;font-size:.75rem;font-weight:600}.topic-name{color:#e2e8f0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topic-bar-wrap{background:#0f172a;border-radius:999px;height:8px;overflow:hidden}.topic-bar-fill{height:100%;background:linear-gradient(90deg,#3b82f6,#8b5cf6);border-radius:999px;transition:width .4s ease}.topic-quizzes{color:#94a3b8;font-size:.78rem;text-align:right}.topic-avg{color:#22c55e;font-size:.78rem;font-weight:600;text-align:right}.users-header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.users-count{font-size:1rem;color:#94a3b8;font-weight:500}.user-search{background:#1e293b;border:1px solid #334155;color:#f1f5f9;padding:9px 14px;border-radius:8px;font-size:.88rem;width:280px;outline:none;transition:border-color .15s}.user-search:focus{border-color:#3b82f6}.user-search::placeholder{color:#475569}.table-wrap{overflow-x:auto;border-radius:10px;border:1px solid #334155}.admin-table{width:100%;border-collapse:collapse;font-size:.85rem}.admin-table th{background:#0f172a;color:#64748b;padding:11px 14px;text-align:left;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap;border-bottom:1px solid #334155}.admin-table td{padding:11px 14px;border-bottom:1px solid #1e293b;color:#e2e8f0;vertical-align:middle}.admin-table tbody tr:hover td{background:#1e293b}.admin-table tbody tr:last-child td{border-bottom:none}.row-num{color:#475569;font-size:.75rem}.user-name-cell{display:flex;align-items:center;gap:10px;white-space:nowrap}.user-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#3b82f6,#8b5cf6);display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;color:#fff;flex-shrink:0}.user-avatar.small{width:26px;height:26px;font-size:.7rem}.user-email{color:#64748b;font-size:.82rem}.center{text-align:center}.score-badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:.78rem;font-weight:600}.score-badge.good{background:#16a34a22;color:#4ade80;border:1px solid #16a34a44}.score-badge.mid{background:#d9770622;color:#fb923c;border:1px solid #d9770644}.score-badge.low{background:#dc262622;color:#f87171;border:1px solid #dc262644}.last-active{color:#64748b;font-size:.8rem}.role-badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:.75rem;font-weight:600}.role-badge.admin{background:#7c3aed22;color:#a78bfa;border:1px solid #7c3aed44}.role-badge.user{background:#0f172a;color:#475569;border:1px solid #334155}.empty-row{text-align:center;color:#475569;padding:40px!important}.empty-state{text-align:center;color:#475569;padding:30px}.pagination{display:flex;align-items:center;justify-content:center;gap:16px;color:#94a3b8;font-size:.88rem}.pagination button{background:#1e293b;border:1px solid #334155;color:#94a3b8;padding:7px 16px;border-radius:8px;cursor:pointer;font-size:.85rem;transition:all .15s}.pagination button:hover:not(:disabled){border-color:#3b82f6;color:#f1f5f9}.pagination button:disabled{opacity:.4;cursor:not-allowed}@media(max-width:768px){.admin-dashboard{padding:16px}.admin-header{flex-direction:column;align-items:flex-start}.chart-row-2{grid-template-columns:1fr}.stat-grid{grid-template-columns:repeat(2,1fr)}.topic-bar-row{grid-template-columns:28px 1fr 60px}.topic-bar-wrap,.topic-avg{display:none}.user-search{width:100%}}