@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--primary:#2563eb;--primary-hover:#1d4ed8;--bg-app:#f8fafc;--bg-sidebar:#fff;--bg-card:#fff;--border:#e2e8f0;--border-focus:#3b82f6;--text-main:#0f172a;--text-muted:#64748b;--success:#16a34a;--success-bg:#dcfce7;--warning:#f59e0b;--warning-bg:#fef3c7;--danger:#dc2626;--danger-bg:#fee2e2;--hover:#f1f5f9;--selected:#dbeafe;--radius:6px;--radius-lg:8px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow:0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -2px #00000014;--transition:all .2s cubic-bezier(.16, 1, .3, 1);--sidebar-width:260px;--sidebar-collapsed-width:70px;--top-nav-height:64px}[data-theme=dark]{--bg-app:#0b0f19;--bg-sidebar:#111827;--bg-card:#1e293b;--border:#334155;--border-focus:#60a5fa;--text-main:#f8fafc;--text-muted:#94a3b8;--hover:#334155;--selected:#1e3a8a;--success-bg:#16a34a26;--warning-bg:#f59e0b26;--danger-bg:#dc262626}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--text-main);background-color:var(--bg-app);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.5}h1{color:var(--text-main);letter-spacing:-.025em;font-size:32px;font-weight:700}h2{color:var(--text-main);letter-spacing:-.02em;font-size:24px;font-weight:600}h3{color:var(--text-main);font-size:18px;font-weight:600}p{color:var(--text-muted)}a{color:var(--primary);transition:var(--transition);text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font-family:inherit;font-size:15px}.app-container{min-height:100vh;display:flex}.auth-container{background-color:var(--bg-app);width:100vw;min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid var(--border);z-index:50;height:100vh;transition:var(--transition);flex-direction:column;flex-shrink:0;display:flex;position:sticky;top:0}.sidebar.collapsed{width:var(--sidebar-collapsed-width)}.sidebar-header{height:var(--top-nav-height);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:0 20px;display:flex}.sidebar-brand{color:var(--text-main);white-space:nowrap;align-items:center;gap:10px;font-size:18px;font-weight:700;display:flex;overflow:hidden}.sidebar-brand img{object-fit:contain;border-radius:4px;width:32px;height:32px}.sidebar-toggle-btn{cursor:pointer;color:var(--text-muted);border-radius:var(--radius);background:0 0;border:none;justify-content:center;align-items:center;padding:6px;display:flex}.sidebar-toggle-btn:hover{background-color:var(--hover);color:var(--text-main)}.sidebar-menu{flex-direction:column;flex:1;gap:20px;padding:16px 12px;display:flex;overflow-y:auto}.sidebar-group-title{text-transform:uppercase;color:var(--text-muted);letter-spacing:.05em;white-space:nowrap;text-overflow:ellipsis;margin-bottom:8px;padding-left:8px;font-size:11px;font-weight:700;overflow:hidden}.sidebar-menu-list{flex-direction:column;gap:4px;list-style:none;display:flex}.sidebar-menu-item a{color:var(--text-muted);border-radius:var(--radius);transition:var(--transition);white-space:nowrap;align-items:center;gap:12px;padding:8px 12px;font-size:14px;font-weight:500;display:flex}.sidebar-menu-item a:hover{background-color:var(--hover);color:var(--text-main);text-decoration:none}.sidebar-menu-item.active a{background-color:var(--selected);color:var(--primary);font-weight:600}.sidebar-footer{border-top:1px solid var(--border);flex-direction:column;gap:12px;padding:16px 12px;display:flex}.user-profile-badge{border-radius:var(--radius);align-items:center;gap:10px;padding:6px 8px;display:flex;overflow:hidden}.user-profile-badge:hover{background-color:var(--hover)}.user-avatar{background-color:var(--selected);width:32px;height:32px;color:var(--primary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.user-info{text-overflow:ellipsis;white-space:nowrap;flex-direction:column;display:flex;overflow:hidden}.user-name{color:var(--text-main);font-size:13px;font-weight:600;line-height:1.2}.user-role{color:var(--text-muted);text-transform:capitalize;font-size:11px}.logout-btn{border:1px solid var(--border);border-radius:var(--radius);width:100%;color:var(--danger);cursor:pointer;transition:var(--transition);background-color:#0000;justify-content:center;align-items:center;gap:8px;padding:8px;font-size:13px;font-weight:500;display:flex}.logout-btn:hover{background-color:var(--danger-bg)}.main-wrapper{flex-direction:column;flex:1;min-width:0;height:100vh;display:flex;overflow:hidden}.top-nav{height:var(--top-nav-height);background-color:var(--bg-sidebar);border-bottom:1px solid var(--border);z-index:40;justify-content:space-between;align-items:center;padding:0 32px;display:flex;position:sticky;top:0}.breadcrumb-container{align-items:center;gap:8px;font-size:14px;display:flex}.breadcrumb-separator,.breadcrumb-item{color:var(--text-muted)}.breadcrumb-item.active{color:var(--text-main);font-weight:500}.top-nav-actions{align-items:center;gap:16px;display:flex}.notification-bell{cursor:pointer;color:var(--text-muted);transition:var(--transition);background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:6px;display:flex;position:relative}.notification-bell:hover{background-color:var(--hover);color:var(--text-main)}.notification-badge{background-color:var(--danger);border-radius:50%;width:8px;height:8px;position:absolute;top:2px;right:2px}.content-container{background-color:var(--bg-app);flex:1;padding:32px;overflow-y:auto}.footer{border-top:1px solid var(--border);background-color:var(--bg-sidebar);color:var(--text-muted);justify-content:space-between;align-items:center;padding:16px 32px;font-size:13px;display:flex}.btn{border-radius:var(--radius);cursor:pointer;transition:var(--transition);border:1px solid #0000;outline:none;justify-content:center;align-items:center;gap:8px;padding:8px 16px;font-size:14px;font-weight:500;display:inline-flex}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-primary:focus{border-color:var(--border-focus);box-shadow:0 0 0 2px #2563eb33}.btn-secondary{background-color:var(--bg-card);border-color:var(--border);color:var(--text-main)}.btn-secondary:hover{background-color:var(--hover)}.btn-danger{background-color:var(--danger);color:#fff}.btn-danger:hover{background-color:#b91c1c}.btn-sm{padding:6px 12px;font-size:13px}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);margin-bottom:24px;padding:24px}.card-title{color:var(--text-main);margin-bottom:16px;font-size:18px;font-weight:600}.badge{text-transform:capitalize;border-radius:9999px;align-items:center;padding:2px 8px;font-size:12px;font-weight:600;display:inline-flex}.badge-success{background-color:var(--success-bg);color:var(--success)}.badge-warning{background-color:var(--warning-bg);color:var(--warning)}.badge-danger{background-color:var(--danger-bg);color:var(--danger)}.badge-info{background-color:var(--selected);color:var(--primary)}.dashboard-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;margin-bottom:32px;display:grid}.stat-card{background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);align-items:center;gap:16px;padding:20px;display:flex}.stat-icon{border-radius:var(--radius);background-color:var(--hover);width:48px;height:48px;color:var(--primary);flex-shrink:0;justify-content:center;align-items:center;display:flex}.stat-info{flex-direction:column;display:flex}.stat-label{color:var(--text-muted);font-size:13px;font-weight:500}.stat-value{color:var(--text-main);margin-top:4px;font-size:24px;font-weight:700;line-height:1.1}.form-group{flex-direction:column;gap:6px;margin-bottom:20px;display:flex}.form-label{color:var(--text-main);font-size:14px;font-weight:600}.form-control{border:1px solid var(--border);border-radius:var(--radius);background-color:var(--bg-card);width:100%;color:var(--text-main);transition:var(--transition);outline:none;padding:8px 12px}.form-control:focus{border-color:var(--border-focus);box-shadow:0 0 0 2px #2563eb26}.form-control::placeholder{color:#a1a1aa}.form-error{color:var(--danger);font-size:13px}.form-helper{color:var(--text-muted);font-size:12px}.checkbox-group{cursor:pointer;align-items:center;gap:8px;display:flex}.checkbox-group input{cursor:pointer}.select-pills{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.select-pill{background-color:var(--hover);border:1px solid var(--border);border-radius:var(--radius);align-items:center;gap:6px;padding:2px 8px;font-size:13px;display:flex}.select-pill-remove{cursor:pointer;color:var(--text-muted);background:0 0;border:none}.select-pill-remove:hover{color:var(--danger)}.table-responsive{border:1px solid var(--border);border-radius:var(--radius);background-color:var(--bg-card);width:100%;overflow-x:auto}.enterprise-table{border-collapse:collapse;text-align:left;width:100%;font-size:14px}.enterprise-table th{background-color:var(--hover);color:var(--text-muted);border-bottom:1px solid var(--border);-webkit-user-select:none;user-select:none;padding:12px 16px;font-weight:600}.enterprise-table td{border-bottom:1px solid var(--border);color:var(--text-main);padding:14px 16px}.enterprise-table tbody tr:last-child td{border-bottom:none}.enterprise-table tr:hover td{background-color:var(--hover)}.table-header-controls{background-color:var(--bg-card);border-bottom:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px;display:flex}.table-search-input{max-width:320px}.table-filters{gap:10px;display:flex}.table-pagination{border-top:1px solid var(--border);background-color:var(--bg-card);color:var(--text-muted);justify-content:space-between;align-items:center;padding:12px 16px;font-size:13px;display:flex}.pagination-btn-group{gap:6px;display:flex}.modal-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:100;background-color:#0f172a66;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-md);width:100%;max-width:500px;animation:.2s cubic-bezier(.16,1,.3,1) modal-enter;overflow:hidden}.modal-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.modal-title{color:var(--text-main);font-size:18px;font-weight:600}.modal-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;font-size:20px}.modal-close:hover{color:var(--text-main)}.modal-body{padding:20px}.modal-footer{background-color:var(--hover);border-top:1px solid var(--border);justify-content:flex-end;gap:10px;padding:12px 20px;display:flex}.toast-container{z-index:200;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:24px;right:24px}.toast{background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md);justify-content:space-between;align-items:center;gap:16px;min-width:280px;max-width:400px;padding:12px 16px;animation:.3s cubic-bezier(.16,1,.3,1) toast-slide;display:flex}.toast-message{color:var(--text-main);font-size:14px}.toast-close-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;font-size:16px;line-height:1}.toast-success{border-left:4px solid var(--success)}.toast-error{border-left:4px solid var(--danger)}.toast-warning{border-left:4px solid var(--warning)}.toast-info{border-left:4px solid var(--primary)}.tabs-header{border-bottom:1px solid var(--border);gap:24px;margin-bottom:24px;display:flex}.tab-btn{cursor:pointer;color:var(--text-muted);transition:var(--transition);background:0 0;border:none;border-bottom:2px solid #0000;padding:10px 4px;font-size:14px;font-weight:500}.tab-btn:hover{color:var(--text-main)}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}.exam-layout{background-color:var(--bg-app);flex-direction:column;width:100vw;height:100vh;display:flex;overflow:hidden}.exam-header{height:var(--top-nav-height);border-bottom:1px solid var(--border);background-color:#fff;flex-shrink:0;justify-content:space-between;align-items:center;padding:0 24px;display:flex}.exam-title-section{align-items:center;gap:12px;display:flex}.exam-title-text{color:var(--text-main);font-size:16px;font-weight:600}.exam-main{height:calc(100vh - var(--top-nav-height));flex:1;display:flex;overflow:hidden}.exam-left-panel{border-right:1px solid var(--border);background-color:#fff;flex-direction:column;flex-shrink:0;width:280px;height:100%;display:flex}.exam-panel-title{color:var(--text-main);border-bottom:1px solid var(--border);padding:16px 20px;font-size:14px;font-weight:600}.question-palette-grid{grid-template-columns:repeat(5,1fr);gap:8px;padding:20px;display:grid;overflow-y:auto}.palette-btn{aspect-ratio:1;border-radius:var(--radius);cursor:pointer;border:1px solid var(--border);color:var(--text-main);transition:var(--transition);background-color:#fff;justify-content:center;align-items:center;font-size:13px;font-weight:600;display:flex}.palette-btn:hover{background-color:var(--hover)}.palette-btn.active{border-color:var(--primary);outline:2px solid var(--primary)}.palette-btn.answered{background-color:var(--success-bg);border-color:var(--success);color:var(--success)}.palette-btn.marked{background-color:var(--warning-bg);border-color:var(--warning);color:var(--warning)}.palette-btn.unvisited{background-color:var(--hover);color:var(--text-muted)}.palette-legend{border-top:1px solid var(--border);flex-direction:column;gap:10px;padding:16px 20px;font-size:12px;display:flex}.legend-item{align-items:center;gap:10px;display:flex}.legend-color{border:1px solid var(--border);border-radius:4px;width:16px;height:16px}.exam-center-panel{background-color:var(--bg-app);flex-direction:column;flex:1;height:100%;padding:40px;display:flex;overflow-y:auto}.question-card{border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);background-color:#fff;flex-direction:column;flex-shrink:0;gap:24px;width:100%;max-width:800px;margin:0 auto;padding:32px;display:flex}.question-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding-bottom:16px;display:flex}.question-number-tag{color:var(--text-muted);font-size:14px;font-weight:600}.question-points-tag{color:var(--primary);font-size:13px;font-weight:500}.question-text{color:var(--text-main);font-size:18px;font-weight:500;line-height:1.6}.options-list{flex-direction:column;gap:12px;display:flex}.option-item{border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:var(--transition);align-items:center;gap:12px;padding:14px 18px;display:flex}.option-item:hover{background-color:var(--hover);border-color:#cbd5e1}.option-item.selected{background-color:var(--selected);border-color:var(--primary)}.option-indicator{border:1px solid var(--border);background-color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;font-size:11px;font-weight:600;display:flex}.option-item.selected .option-indicator{background-color:var(--primary);border-color:var(--primary);color:#fff}.text-answer-area{border:1px solid var(--border);border-radius:var(--radius);resize:vertical;outline:none;width:100%;height:180px;padding:12px;font-size:15px}.text-answer-area:focus{border-color:var(--border-focus)}.question-actions{justify-content:space-between;margin-top:12px;display:flex}.exam-right-panel{border-left:1px solid var(--border);background-color:#fff;flex-direction:column;flex-shrink:0;width:280px;height:100%;display:flex}.timer-box{border-bottom:1px solid var(--border);flex-direction:column;align-items:center;gap:12px;padding:24px 20px;display:flex}.timer-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:12px;font-weight:700}.timer-clock{color:var(--text-main);font-variant-numeric:tabular-nums;letter-spacing:-.02em;font-size:32px;font-weight:700}.timer-clock.warning-time{color:var(--danger);animation:1s infinite alternate pulse}.progress-stats-box{flex-direction:column;flex:1;gap:16px;padding:20px;display:flex}.progress-row{justify-content:space-between;font-size:14px;display:flex}.progress-row-label{color:var(--text-muted)}.progress-row-val{color:var(--text-main);font-weight:600}.auto-save-indicator{color:var(--text-muted);background-color:var(--hover);border-radius:var(--radius);justify-content:center;align-items:center;gap:8px;margin-top:auto;padding:12px;font-size:13px;display:flex}.auto-save-dot{background-color:var(--success);border-radius:50%;width:8px;height:8px}.auto-save-dot.saving{background-color:var(--warning);animation:.5s infinite alternate pulse}.exam-submit-box{border-top:1px solid var(--border);padding:20px}.results-page{max-width:1000px;margin:0 auto}.results-header-summary{grid-template-columns:repeat(4,1fr);gap:20px;margin:24px 0;display:grid}.score-hero-card{color:#fff;background:linear-gradient(135deg,#1e3a8a,#2563eb);border:none;grid-column:span 2}.score-hero-card .card-title{color:#fffc;text-transform:uppercase;letter-spacing:.05em;font-size:14px}.score-hero-value-box{align-items:baseline;gap:10px;margin:12px 0;display:flex}.score-hero-percentage{letter-spacing:-.02em;font-size:48px;font-weight:800}.score-hero-fraction{color:#ffffffb3;font-size:18px}.results-grid{grid-template-columns:2fr 1fr;gap:24px;display:grid}.results-chart-container{height:300px}@keyframes modal-enter{0%{opacity:0;transform:scale(.95)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}@keyframes toast-slide{0%{opacity:0;transform:translateY(20px)scale(.9)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes pulse{0%{opacity:1}to{opacity:.4}}.skeleton{background:linear-gradient(90deg,#f1f5f9 25%,#e2e8f0 37%,#f1f5f9 63%) 0 0/400% 100%;border-radius:4px;width:100%;height:16px;animation:1.4s infinite skeleton-loading}@keyframes skeleton-loading{0%{background-position:100%}to{background-position:0%}}@media (width<=1024px){.app-container{flex-direction:column}.sidebar{width:100%;height:auto;position:relative}.sidebar.collapsed{width:100%}.main-wrapper{height:auto;overflow:visible}.exam-main{flex-direction:column;height:auto;overflow:visible}.exam-left-panel,.exam-right-panel{width:100%;height:auto}.results-grid{grid-template-columns:1fr}.results-header-summary{grid-template-columns:repeat(2,1fr)}}@media (width<=640px){.results-header-summary{grid-template-columns:1fr}.score-hero-card{grid-column:span 1}.top-nav{padding:0 16px}.content-container{padding:16px}}.drawer-overlay{z-index:200;background:#00000059;animation:.2s fadeIn;position:fixed;inset:0}.drawer{background:var(--bg-card);z-index:201;flex-direction:column;width:420px;max-width:95vw;height:100vh;animation:.25s cubic-bezier(.16,1,.3,1) slideInRight;display:flex;position:fixed;top:0;right:0;overflow:hidden;box-shadow:-8px 0 32px #0000001f}.drawer-header{border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.drawer-body{flex:1;padding:24px;overflow-y:auto}.drawer-footer{border-top:1px solid var(--border);flex-wrap:wrap;flex-shrink:0;gap:8px;padding:16px 24px;display:flex}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.skeleton{background:linear-gradient(90deg, var(--hover) 25%, #e8edf2 50%, var(--hover) 75%);border-radius:var(--radius);background-size:200% 100%;animation:1.4s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-text{border-radius:4px;height:14px;margin-bottom:8px}.skeleton-avatar{border-radius:50%;flex-shrink:0;width:48px;height:48px}.exam-schedule-card{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-card);transition:var(--transition);padding:20px;position:relative;overflow:hidden}.exam-schedule-card:before{content:"";background:var(--primary);border-radius:4px 0 0 4px;width:4px;position:absolute;top:0;bottom:0;left:0}.exam-schedule-card.status-active:before{background:var(--success)}.exam-schedule-card.status-completed:before{background:var(--text-muted)}.exam-schedule-card.status-cancelled:before{background:var(--danger)}.exam-schedule-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.exam-meta-grid{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px;display:grid}.exam-meta-item{flex-direction:column;gap:2px;display:flex}.exam-meta-item span:first-child{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:11px}.exam-meta-item span:last-child{color:var(--text-main);font-size:13px;font-weight:600}.grading-answer-row{border:1px solid var(--border);border-radius:var(--radius);background:var(--hover);margin-bottom:12px;padding:16px}.marks-input{border:1px solid var(--border);border-radius:var(--radius);text-align:center;width:80px;color:var(--primary);padding:6px 10px;font-size:14px;font-weight:600}.search-bar-wrapper{position:relative}.search-bar-input{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-card);width:100%;transition:var(--transition);color:var(--text-main);padding:12px 16px 12px 44px;font-size:15px}.search-bar-input:focus{border-color:var(--border-focus);outline:none;box-shadow:0 0 0 3px #3b82f61f}.search-bar-icon{color:var(--text-muted);pointer-events:none;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.stat-pill{background:var(--hover);color:var(--text-main);border-radius:999px;align-items:center;gap:4px;padding:4px 10px;font-size:12px;font-weight:600;display:inline-flex}.stat-pill.easy{background:var(--success-bg);color:var(--success)}.stat-pill.medium{background:var(--warning-bg);color:var(--warning)}.stat-pill.hard{background:var(--danger-bg);color:var(--danger)}