:root{--primary-color: #2c3e50;--secondary-color: #3498db;--accent-color: #e74c3c;--light-color: #ecf0f1;--dark-color: #2c3e50;--success-color: #2ecc71;--warning-color: #f39c12;--info-color: #3498db}*{margin:0;padding:0;box-sizing:border-box;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}body{background-color:#f5f5f5;color:#333;overflow-x:hidden}.login-container{height:100vh;overflow:hidden;position:relative}.login-form{background:#fff;padding:2rem 2rem 4rem;border-radius:10px;box-shadow:0 10px 30px #0003;width:400px;text-align:center;animation:fadeIn 1s ease-in-out;position:absolute;left:15%;top:6%}@keyframes fadeIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.login-form h1{margin-bottom:1.5rem;color:var(--primary-color)}.form-group{margin-bottom:1.5rem;text-align:left}.form-group input{width:100%;padding:.8rem;border:1px solid #ddd;border-radius:5px;font-size:1rem;transition:border .3s}.form-group input:focus{border-color:var(--secondary-color);outline:none;box-shadow:0 0 0 3px #3498db33}.login-btn{width:100%;padding:.8rem;background-color:var(--secondary-color);color:#fff;border:none;border-radius:5px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .3s}.login-btn:hover{background-color:#2980b9}.lms-container{min-height:100vh}.header{background-color:var(--primary-color);color:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 10px #0000001a;position:sticky;top:0;z-index:100}.header-left{display:flex;align-items:center}.header-left h1{font-size:1.5rem;margin-left:1rem}.logo img{width:50px;height:50px;border-radius:50%;object-fit:cover}.logo2 img{width:200px;height:100px;border-radius:50%;object-fit:cover}.logopara{opacity:.5;line-height:0;margin-bottom:4rem}.header-right{display:flex;align-items:center}.user-avatar{width:40px;height:40px;border-radius:50%;background-color:var(--light-color);margin-right:.5rem;overflow:hidden;display:flex;justify-content:center;align-items:center;color:var(--dark-color);font-weight:700}.user-avatar img{width:100%;height:100%;object-fit:cover}.notification-badge{position:absolute;top:-5px;right:-5px;background-color:var(--accent-color);color:#fff;border-radius:50%;width:18px;height:18px;display:flex;justify-content:center;align-items:center;font-size:.7rem;font-weight:700}.main-container{display:flex;min-height:calc(100vh - 70px)}.sidebar{width:250px;background-color:#fff;padding:1rem 0;font-weight:500}.sidebar-menu{list-style:none}.sidebar-menu li{margin-bottom:.5rem}.sidebar-menu a{display:flex;align-items:center;padding:.6rem 1.5rem;color:var(--dark-color);text-decoration:none;transition:all .3s;border-left:3px solid transparent}.sidebar-menu a:hover,.sidebar-menu a.active{background-color:#3498db1a;border-left:3px solid var(--secondary-color);color:var(--secondary-color)}.sidebar-menu a:hover{transform:translate(8px)}.sidebar-menu a i{margin-right:.8rem;font-size:1.1rem}.content{flex:1;padding:.01rem 2rem 2rem;background-color:#f9f9f9}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.dashboard-header h2{color:var(--primary-color);font-size:1.8rem}.date-display{background-color:#fff;padding:.5rem 1rem;border-radius:5px;box-shadow:0 2px 5px #0000000d;font-weight:600}.dashboard-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem;margin-bottom:2rem}.card{background-color:#fff;border-radius:10px;box-shadow:0 5px 15px #0000000d;padding:1.5rem;transition:transform .3s,box-shadow .3s}.card:hover{transform:translateY(-5px);box-shadow:0 10px 20px #0000001a}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.card-title{font-size:1.2rem;font-weight:600;color:var(--primary-color)}.card-icon{width:40px;height:40px;border-radius:50%;display:flex;justify-content:center;align-items:center;color:#fff}.card-icon.primary{background-color:var(--primary-color)}.card-icon.secondary{background-color:var(--secondary-color)}.card-icon.accent{background-color:var(--accent-color)}.card-icon.success{background-color:var(--success-color)}.card-content{color:#666;line-height:1.6}.attendance-chart{height:200px;margin-top:1rem}.table-container{background-color:#fff;border-radius:10px;box-shadow:0 5px 15px #0000000d;padding:1.5rem;margin-bottom:2rem;overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{padding:1rem;text-align:left;border-bottom:1px solid #eee}th{background-color:#f5f5f5;font-weight:600;color:var(--primary-color)}tr:hover{background-color:#f9f9f9}.status-badge{padding:.3rem .6rem;border-radius:20px;font-size:.8rem;font-weight:600}.status-badge.present{background-color:#2ecc711a;color:var(--success-color)}.status-badge.absent{background-color:#e74c3c1a;color:var(--accent-color)}.status-badge.late{background-color:#f39c121a;color:var(--warning-color)}.course-progress{margin-top:1rem}.progress-bar{height:8px;background-color:#eee;border-radius:4px;overflow:hidden;margin-top:.5rem}.progress-fill{height:100%;background-color:var(--secondary-color);border-radius:4px}.notification-container{position:fixed;top:20px;right:20px;z-index:1000;max-width:350px}.notification{background-color:#fff;border-radius:8px;box-shadow:0 5px 15px #0000001a;padding:1rem;margin-bottom:1rem;display:flex;align-items:flex-start;transform:translate(100%);opacity:0;transition:all .3s 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1rem;display:flex;justify-content:space-between;align-items:center;cursor:pointer}.ai-chat-body{flex:1;padding:1rem;overflow-y:auto;max-height:400px}.ai-message{margin-bottom:1rem;display:flex;flex-direction:column}.ai-message-content{max-width:80%;padding:.8rem;border-radius:10px;margin-bottom:.5rem;line-height:1.4}.ai-message.received .ai-message-content{background-color:#f0f0f0;align-self:flex-start}.ai-message.sent .ai-message-content{background-color:var(--secondary-color);color:#fff;align-self:flex-end}.ai-message-time{font-size:.7rem;color:#999;align-self:flex-end}.ai-chat-input{display:flex;padding:.8rem;border-top:1px solid #eee}.ai-chat-input input{flex:1;padding:.8rem;border:1px solid #ddd;border-radius:20px;outline:none}.ai-chat-input button{background-color:var(--secondary-color);color:#fff;border:none;border-radius:50%;width:40px;height:40px;margin-left:.5rem;cursor:pointer;transition:background-color .3s}.ai-chat-input button:hover{background-color:#2980b9}.ai-chat-toggle{position:fixed;bottom:20px;right:20px;width:60px;height:60px;background-color:var(--secondary-color);color:#fff;border-radius:50%;display:flex;justify-content:center;align-items:center;cursor:pointer;box-shadow:0 5px 15px #0003;z-index:1000;font-size:1.5rem;display:none}.profile-container{max-width:800px;margin:0 auto}.profile-header{display:flex;align-items:center;margin-bottom:2rem}.profile-avatar{width:120px;height:120px;border-radius:50%;background-color:#eee;margin-right:2rem;overflow:hidden;position:relative}.profile-avatar img{width:100%;height:100%;object-fit:cover}.profile-avatar-edit{position:absolute;bottom:1rem;right:1rem;background-color:var(--secondary-color);color:#fff;width:35px;height:35px;border-radius:50%;display:flex;justify-content:center;align-items:center;cursor:pointer;opacity:0;transition:all .2s ease-in}.profile-avatar:hover .profile-avatar-edit{opacity:1}.profile-info h2{color:var(--primary-color);margin-bottom:.5rem}.profile-info p{color:#666;margin-bottom:.3rem}.profile-section{margin-bottom:2rem}.profile-section h3{color:var(--primary-color);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid #eee}.form-row{display:flex;margin-bottom:1rem}.form-group{flex:1;margin-right:1rem}.form-group:last-child{margin-right:0}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--dark-color)}.form-group input,.form-group select{width:100%;padding:.8rem;border:1px solid #ddd;border-radius:5px;font-size:1rem}.save-btn{background-color:var(--secondary-color);color:#fff;border:none;padding:.8rem 1.5rem;border-radius:5px;font-size:1rem;font-weight:600;cursor:pointer;transition:background-color .3s}.save-btn:hover{background-color:#2980b9}.tabs{display:flex;border-bottom:1px solid #ddd;margin-bottom:1.5rem}.tab{padding:.8rem 1.5rem;cursor:pointer;border-bottom:3px solid transparent;transition:all .3s}.tab.active{border-bottom:3px solid var(--secondary-color);color:var(--secondary-color);font-weight:600}.tab-content{display:none}.tab-content.active{display:block}.lectures-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:1.5rem;margin-bottom:2rem}.lecture-card{background-color:#fff;border-radius:8px;box-shadow:0 5px 15px #0000000d;padding:1.5rem;transition:transform .3s,box-shadow .3s}.lecture-card:hover{transform:translateY(-5px);box-shadow:0 10px 20px #0000001a}.lecture-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid #eee}.lecture-header h3{color:var(--primary-color);margin:0}.lecture-status{padding:.3rem .8rem;border-radius:20px;font-size:.8rem;font-weight:600}.lecture-status.upcoming{background-color:#f39c121a;color:var(--warning-color)}.lecture-status.live{background-color:#2ecc711a;color:var(--success-color);animation:pulse 2s infinite}@keyframes 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h3{color:var(--primary-color);margin-bottom:1rem}.upcoming-lectures table{width:100%;border-collapse:collapse}.upcoming-lectures th,.upcoming-lectures td{padding:.8rem;text-align:left;border-bottom:1px solid #eee}.upcoming-lectures th{background-color:#f5f5f5;font-weight:600;color:var(--primary-color)}.upcoming-lectures tr:hover{background-color:#f9f9f9}.add-calendar{padding:.4rem .8rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:.9rem;transition:background-color .3s}.add-calendar:hover{background-color:#1a252f}.lecture-card{flex:0 0 300px;min-width:300px;height:300px;display:flex;flex-direction:column;background:#fff;border-radius:10px;box-shadow:0 4px 8px #0000001a;overflow:hidden;transition:transform .3s}.lecture-card:hover{transform:translateY(-5px)}.lecture-header{padding:15px;background:#f8f9fa;border-bottom:1px solid #eee}.lecture-header 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0}.lectures-slider{display:flex;overflow-x:auto;scroll-behavior:smooth;gap:20px;padding:15px 5px;scrollbar-width:none;-ms-overflow-style:none;width:950px}::-webkit-scrollbar{display:none}.lectures-slider::-webkit-scrollbar{display:none}.slider-nav{background:#f8f9fa;border:none;border-radius:50%;width:40px;height:40px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;transition:all .3s;box-shadow:0 2px 5px #0000001a;opacity:0}.lectures-slider-container:hover .slider-nav{opacity:1}.slider-nav:hover{background:#e2e6ea}.upcoming-lectures{margin-top:30px}.upcoming-lectures table{width:100%;border-collapse:collapse;margin-top:15px}.upcoming-lectures th,.upcoming-lectures td{padding:12px 15px;text-align:left;border-bottom:1px solid #ddd}.upcoming-lectures th{background:#f8f9fa;font-weight:600}.upcoming-lectures tr:hover{background:#f5f5f5}.course-item{background-color:#fff;border-radius:8px;box-shadow:0 2px 5px #0000000d;padding:1rem;margin-bottom:1rem;display:flex;justify-content:space-between;align-items:center;color:#3f51b5}.course-folder-icon{margin-right:8px}.course-info h4{color:var(--primary-color);margin-bottom:.3rem;color:#3f51b5;max-width:300px}.course-info p{color:#666;font-size:.9rem}.course-action{background-color:var(--secondary-color);color:#fff;border:none;padding:.5rem 1rem;border-radius:5px;cursor:pointer;transition:background-color .3s}.course-action:hover{background-color:#2980b9}.course-toggle{background:none;border:none;cursor:pointer;font-size:1.1rem;padding:.5rem;color:#95a5a6;transition:all .3s ease}.course-toggle .fa-lock{color:red}.course-toggle .fa-check{color:#2ecc71;display:none}.course-toggle.completed .fa-lock{display:none}.course-toggle.completed .fa-check{display:inline-block}.reset-courses-btn{background-color:#e74c3c;color:#fff;border:none;border-radius:4px;padding:8px 16px;margin:10px;font-size:14px;font-weight:700;cursor:pointer;transition:all .3s 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#eee}.notification-actions{display:flex;align-items:center;gap:10px}.close-notifications{background:none;border:none;color:#95a5a6;cursor:pointer;padding:5px;font-size:14px;transition:color .2s}.close-notifications:hover{color:#e74c3c}.close-notifications i{display:block}.custom-modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;z-index:1000;justify-content:center;align-items:center}.custom-modal .modal-content{background-color:#fff;border-radius:8px;width:90%;max-width:400px;box-shadow:0 4px 20px #00000026;animation:modalFadeIn .3s ease-out;color:#000}@keyframes modalFadeIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.modal-header{padding:15px 20px;border-bottom:1px solid #eee;display:flex;justify-content:space-between;align-items:center}.modal-header h3{margin:0}.close-modal{font-size:24px;cursor:pointer;color:#777}.modal-body{padding:20px}.modal-footer{padding:15px 20px;border-top:1px solid #eee;display:flex;justify-content:flex-end;gap:10px;align-items:center}.modal-footer .btn{padding:8px 16px;border-radius:4px;cursor:pointer;border:none;font-weight:500}.btn-danger{background-color:#e74c3c;color:#fff;margin-top:0}.btn-secondary{background-color:#ecf0f1;color:#333;height:fit-content}.modal{display:none;position:fixed;top:20px;right:-400px;width:350px;background:#fff;border-radius:8px;box-shadow:0 4px 12px #00000026;z-index:1000;padding:20px;font-family:Arial,sans-serif;transition:right .4s ease-out}.modal.active{display:block;right:20px}.close-btn{position:absolute;top:-10px;right:-10px;font-size:22px;cursor:pointer;color:red;background:#fff;border-radius:50%;width:28px;height:28px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 4px #0000001a}.close-btn:hover{color:#555}.modal p{margin:0;color:#333;font-size:16px}.custom-select-wrapper{position:relative;display:inline-block;width:200px}.form-control{padding:8px 30px 8px 12px;border:2px solid #ddd;border-radius:4px;font-size:16px;width:100%;appearance:none;background-color:#fff;cursor:pointer}.custom-arrow{position:absolute;top:50%;right:12px;transform:translateY(-50%);pointer-events:none;transition:transform .3s ease;font-size:12px}.custom-select-wrapper.active .custom-arrow{transform:translateY(-50%) rotate(180deg)}.form-control:focus{outline:none;border-color:#4a90e2;box-shadow:0 0 0 2px #4a90e233}.year-results{margin-top:20px;border:1px solid #eee;border-radius:4px;padding:15px;background-color:#f9f9f9}.year-results h3{margin-top:0;color:#333;border-bottom:1px solid #ddd;padding-bottom:8px}#results .failing-grade{background-color:#fdd;color:#c00}#results .failing-grade td{border-color:#f99}#results .failing-grade:hover{background-color:#fcc}.export-button{margin-left:20px;padding:8px 16px;background-color:#4caf50;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px;transition:background-color .3s}.export-button:hover{background-color:#45a049}.tabs{display:flex;align-items:center}.tab.CGPA{margin-left:auto}.calendar-header{text-align:center;margin-bottom:10px}.calendar-table th{text-align:center;padding:5px;font-size:.8em;color:#666}.calendar-table td{text-align:center;padding:5px;border:1px solid #eee}.calendar-table td.current-day{background-color:#4caf50;color:#fff;border-radius:50%;font-weight:700}.progress-fill{background-color:#2196f3;transition:width .3s ease}.progress-fill.completed{background-color:#4caf50}.fa-graduation-cap.cap2{margin-left:8px;color:green}.fee-table-container{background:#fff;border-radius:8px;padding:1.5rem;box-shadow:0 2px 5px #0000001a}.fee-table{width:100%;border-collapse:collapse;margin-top:1rem}.fee-table th,.fee-table td{padding:12px 15px;text-align:left;border-bottom:1px solid #eee}.fee-table th{background-color:#f8f9fa;font-weight:600}.paid-amount{color:#28a745;font-weight:500}.debit-balance{color:#dc3545;font-weight:500}.credit-balance{color:#28a745;font-weight:500}.payment-status{padding:5px 10px;border-radius:4px;font-size:.85rem;font-weight:500}.payment-status.paid{background-color:#d4edda;color:#155724}.payment-status.pending{background-color:#fff3cd;color:#856404}.fa-check-circle{color:#28a745;margin-left:5px}.fa-spinner{color:#ffc107;margin-left:5px;animation:spin 1s linear infinite}.payment-tracker{position:relative;width:40px;height:40px;margin:0 auto}.progress-circle{width:100%;height:100%}.circle-bg{fill:none;stroke:#eee;stroke-width:3}.circle-fill{fill:none;stroke-width:3;stroke-linecap:round;animation:progress 1s ease-out forwards}.tracker-percent{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:10px;font-weight:700;color:#555}.payment-action{background-color:#007bff;color:#fff;border:none;padding:8px 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rgba(255,255,0,.7)}.notification-progress{position:absolute;bottom:0;left:0;height:3px;background-color:var(--secondary-color);width:100%;transform:scaleX(0);transform-origin:left;animation:progress 8s linear forwards}@keyframes progress{to{transform:scaleX(1)}}.lecture-modal{display:none;position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background-color:#000000e6}.lecture-modal .modal-content{position:relative;background-color:#2a2a2a;margin:5% auto;padding:20px;width:90%;max-width:600px;border-radius:8px;color:#fff}.close-modal{position:absolute;right:20px;top:10px;color:#aaa;font-size:28px;font-weight:700;cursor:pointer}.close-modal:hover{color:#fff}.modal-header{margin-bottom:20px;padding-bottom:10px;border-bottom:1px solid #444}.meeting-options{display:flex;gap:20px;margin:30px 0}.option-card{flex:1;padding:20px;background:#444;border-radius:8px;text-align:center;cursor:pointer;transition:transform .2s,background 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#e1e4e8;align-items:center;display:flex;flex-direction:column;justify-content:space-between}.course-code{font-weight:700;color:#3f51b5;font-size:15px}.assignment-title{font-weight:600;font-size:16px;color:#333;margin:5px 0}.assignment-dates{display:flex;flex-direction:column;gap:8px;margin:5px 0}.date-item{display:flex;align-items:center;gap:8px;font-size:14px;color:#555}.date-item i{color:#666;width:16px;text-align:center}.assignment-status{display:flex;align-items:center;gap:8px;color:#4caf50;font-size:14px;margin-top:5px}.assignment-status i{font-size:16px}.marks-display{font-size:30px;font-weight:700;color:#333;margin-top:2rem}.assignment-marks.excellent{background-color:#4caf5026;border-right:3px solid #4CAF50}.assignment-marks.good{background-color:#8bc34a26;border-right:3px solid #8BC34A}.assignment-marks.average{background-color:#ffc10726;border-right:3px solid #FFC107}.assignment-marks.poor{background-color:#f4433626;border-right:3px solid #F44336}.assignment-marks .marks-display{color:#333}.view-results{background:#04b804;color:#fff;border:none;border-radius:4px;padding:8px 15px;font-size:14px;cursor:pointer;width:100%;max-width:150px;margin-top:10px;transition:background .2s ease-in}.view-results:hover{background:#05d505}.view-results:active{background:#05ea05}.view-results i{font-size:12px}.marks-pending{font-size:30px;margin:15px 0;text-align:center}.marks-display i{color:#f44336}.submitted-btn{background:#3f51b5;color:#fff;border:none;border-radius:4px;padding:8px 15px;font-size:14px;cursor:default;width:100%;max-width:150px;margin-top:10px;text-align:center}.marks-pending+.view-results{display:none}.marks-display.not-submitted i{color:#ff9800}.not-submitted-btn{background:#ff9800;color:#fff;border:none;border-radius:4px;padding:8px 15px;font-size:14px;width:100%;max-width:150px;margin-top:10px;text-align:center;opacity:.8;cursor:default}.marks-display.pending-marks i{color:#f44336}.submitted-btn{background:#3f51b5;color:#fff;border:none;border-radius:4px;padding:8px 15px;font-size:14px;width:100%;max-width:150px;margin-top:10px;text-align:center;opacity:.8;cursor:default}.tut-tab-content{padding:20px;background-color:#f9f9f9;border-radius:8px;box-shadow:0 2px 10px #0000000d}.tut-dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.tut-dashboard-header h2{font-size:24px;color:#333;margin:0}.tut-date-display{color:#666;font-size:14px}.tut-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:25px;margin-top:20px}.tut-card{background:#fff;border-radius:12px;box-shadow:0 4px 12px #00000014;padding:24px;transition:all .3s ease;border:1px solid #eaeaea;display:flex;flex-direction:column;height:100%;min-height:380px}.tut-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:18px;min-height:60px}.tut-card-title{font-size:18px;color:#2d3748;margin:0;font-weight:600;line-height:1.4;flex:1}.tut-status{font-size:12px;padding:4px 10px;border-radius:12px;font-weight:600;margin-left:10px}.tut-status-new{background-color:#ebf5ff;color:#3182ce}.tut-status-completed{background-color:#f0fff4;color:#38a169}.tut-meta{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:20px;font-size:14px;color:#4a5568}.tut-meta-item{display:flex;align-items:center;gap:6px}.tut-meta-item i{font-size:14px;color:#718096}.tut-description{font-size:15px;color:#4a5568;line-height:1.5;margin-bottom:20px;flex-grow:1;display:-webkit-box;line-clamp:content;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;min-height:72px}.tut-progress{margin-bottom:20px}.tut-progress-bar{height:6px;background-color:#edf2f7;border-radius:3px;margin-bottom:8px;overflow:hidden}.tut-progress-fill{height:100%;background-color:#4caf50;border-radius:3px;transition:width .4s ease}.tut-progress-text{font-size:13px;color:#718096;display:block;text-align:right;font-weight:500}.tut-action-btn{width:100%;padding:12px 16px;background:linear-gradient(135deg,#4299e1,#3182ce);color:#fff;border:none;border-radius:6px;font-weight:500;font-size:15px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:8px;margin-top:auto}.tut-action-btn:hover{background:linear-gradient(135deg,#3182ce,#2b6cb0);transform:translateY(-1px)}.tut-action-btn:active{transform:translateY(0)}.tut-action-btn i{font-size:14px}.tut-video-modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:#000c;z-index:1000;justify-content:center;align-items:center}.tut-modal-content{background-color:#fff;width:80%;max-width:800px;border-radius:8px;overflow:hidden}.tut-modal-header{padding:15px 20px;background-color:#f5f5f5;border-bottom:1px solid #ddd;display:flex;justify-content:space-between;align-items:center}.tut-modal-header h3{margin:0;font-size:18px;color:#333}.tut-close-modal{font-size:24px;cursor:pointer;color:#666}.tut-close-modal:hover{color:#333}.tut-video-container{position:relative;padding-bottom:56.25%;height:0;overflow:hidden}.tut-video-container video{position:absolute;top:0;left:0;width:100%;height:100%}.tut-modal-footer{padding:15px;background-color:#f5f5f5;border-top:1px solid #ddd}.tut-video-progress{display:flex;align-items:center;gap:10px;margin-bottom:10px}.tut-video-progress span{font-size:13px;color:#666;min-width:40px}#tut-progressBar{flex:1;height:6px;cursor:pointer}.tut-video-controls{display:flex;align-items:center;gap:15px}.tut-video-controls button{background:none;border:none;cursor:pointer;color:#666;font-size:16px}.tut-video-controls button:hover{color:#333}#tut-volumeControl{width:80px;height:6px;cursor:pointer}.tut-status-in-progress{background-color:#fff3cd;color:#856404}.profile-info p{margin:5px 0;color:#555}.profile-info h2{margin-bottom:10px;color:#2d3748}.alert{position:fixed;top:20px;right:20px;padding:15px 25px;border-radius:5px;color:#fff;font-weight:500;box-shadow:0 4px 12px #00000026;z-index:1000;transition:opacity .3s ease}.alert-success{background-color:#4caf50}.alert-error{background-color:#f44336}.custom-alert{position:fixed;top:15%;right:4rem;background-color:#f44;color:#fff;padding:10px 15px;border-radius:5px;box-shadow:0 4px 8px #0000001a;display:none;z-index:1000;animation:slideIn .3s ease-out;max-width:300px;font-size:14px}.alert-content{display:flex;justify-content:space-between;align-items:center}.close-alert{background:none;border:none;color:#fff;font-size:20px;cursor:pointer;margin-left:15px;margin-top:-1rem}.lecture-status.ended{background-color:#6c757d;color:#fff}.join-button.ended-button{background-color:#6c757d;color:#fff;cursor:not-allowed;opacity:.7}.exam-cards-container{display:flex;gap:20px;flex-wrap:wrap}.exam-card{width:300px;background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;overflow:hidden;display:flex;flex-direction:column}.exam-content{padding:20px}.exam-content h3{margin:0 0 12px;font-size:16px}.exam-meta span{display:block;color:#666;font-size:13px;margin-bottom:8px}.exam-footer{padding:0 20px 20px;margin-top:auto}.exam-btn{width:100%;padding:10px;border:none;border-radius:6px;font-weight:500;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s}.exam-btn.begin{background:#2196f3;color:#fff}.exam-btn.begin:hover{background:#0d8bf2;transform:translateY(-1px)}.exam-btn.submitted{background:#f5f5f5;color:#666;cursor:not-allowed}.exam-btn i{font-size:14px}.admin-controls{margin-top:15px;padding:10px;background:#f8f9fa;border-radius:5px}.day-toggles{display:flex;gap:5px}.day-toggle{padding:5px 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.spinner-text{font-size:18px;color:#333;font-weight:500}.logout-spinner{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#ffffffe6;display:none;flex-direction:column;justify-content:center;align-items:center;z-index:9999;color:#fff}.spinner-logo{position:relative;width:300px;height:300px;animation:pulse 1.5s infinite ease-in-out}.spinner-logo img{width:100%;height:100%;object-fit:contain}.spinner-logo .spinner{position:absolute;inset:-10px;border:4px solid rgba(255,255,255,.1);border-top-color:#3498db;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%{transform:scale(.95)}50%{transform:scale(1.05)}to{transform:scale(.95)}}.logout-spinner p{margin-top:20px;font-size:1.2rem;font-weight:700;color:var(--secondary-color)}@media(max-width:768px){.sidebar{overflow:hidden}.sidebar-menu a i{margin-right:0;font-size:1.3rem}.dashboard-cards{grid-template-columns:1fr}.profile-header{flex-direction:column;text-align:center}.profile-avatar{margin-right:0;margin-bottom:1rem}.form-row{flex-direction:column}.form-group{margin-right:0;margin-bottom:1rem}}.admin-controls{margin-top:20px;padding:15px;background:#f8f9fa;border-radius:8px}.text-muted{color:#6c757d!important;margin-bottom:10px}.day-toggles{display:flex;gap:10px;margin-bottom:15px}.day-toggle{padding:8px 16px;border:2px solid #ddd;background:#fff;border-radius:6px;cursor:pointer;font-weight:500;transition:all .3s}.day-toggle.btn-present{background:#27ae60;color:#fff;border-color:#27ae60}.day-toggle.btn-absent{background:#e74c3c;color:#fff;border-color:#e74c3c}.day-toggle.active{transform:scale(1.05);box-shadow:0 3px 10px #0003}.btn{display:inline-block;font-weight:400;text-align:center;white-space:nowrap;vertical-align:middle;-webkit-user-select:none;user-select:none;border:1px solid transparent;padding:.375rem .75rem;font-size:1rem;line-height:1.5;border-radius:.25rem;transition:color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out}.btn-sm{padding:.25rem .5rem;font-size:.875rem;line-height:1.5;border-radius:.2rem}.btn-warning{color:#212529;background-color:#ffc107;border-color:#ffc107}.btn-success{color:#fff;background-color:#28a745;border-color:#28a745}.btn-success:hover{background-color:#218838;border-color:#1e7e34}.mt-2{margin-top:.5rem!important}.calendar-table th{padding:10px;text-align:center;color:#7f8c8d;font-size:12px;font-weight:600;border-bottom:1px solid #eee}.calendar-table td{padding:12px;text-align:center;border:1px solid #f1f1f1;cursor:pointer;transition:background .3s;font-size:14px}.calendar-table td:hover{background:#f8f9fa}.calendar-table .current-day{background:#3498db;color:#fff;border-radius:50%;font-weight:700}@keyframes progressAnimation{0%{width:0%}to{width:var(--progress-width)}}.progress-fill{animation:progressAnimation 1s ease-in-out}@media(max-width:1200px){.dashboard-cards{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}}@media(max-width:768px){.dashboard-cards{grid-template-columns:1fr}.day-toggles{flex-wrap:wrap}.day-toggle{flex:1;min-width:60px}}@keyframes slideOut{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-20px)}}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes slideOut{0%{transform:translate(0);opacity:1}to{transform:translate(100%);opacity:0}}.day-toggle:hover{opacity:.9;transform:translateY(-2px)}.day-toggle:active{transform:translateY(0)}.calendar-table{width:100%;border-collapse:collapse}.calendar-table th{padding:8px;text-align:center;font-weight:500;color:#666}.calendar-table td{padding:10px;text-align:center;border:1px solid #eee}.calendar-table .current-day{background-color:#3498db;color:#fff;font-weight:700;border-radius:50%}.dashboard-container{min-height:100vh;background-color:#f5f7fb}.dashboard-content{padding:2rem;margin-left:260px;transition:margin-left .3s}.dashboard-content.sidebar-collapsed{margin-left:70px}.dashboard-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem;margin-bottom:2rem;opacity:1;transition:opacity .3s ease}.dashboard-cards.loading{opacity:.5}.calendar-table{min-height:250px}.attendance-chart{height:200px!important;min-height:200px;position:relative}.dashboard-spinner{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#fffffff2;display:flex;justify-content:center;align-items:center;z-index:9999;flex-direction:column}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.dashboard-spinner .spinner{animation:spin 1s linear infinite}