.header{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-dark) 100%);color:#fff;padding:15px 20px;box-shadow:var(--box-shadow)}.header-content{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px;max-width:1400px;margin:0 auto}.header-left{display:flex;align-items:center;gap:10px}.sidebar-toggle-header{background:linear-gradient(135deg,#87CEEB 0%,#ADD8E6 100%);border:none;color:#fff;width:35px;height:35px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:all .3s ease;flex-shrink:0;box-shadow:0 2px 8px #87cefa4d}.sidebar-toggle-header:hover{background:linear-gradient(135deg,#ADD8E6 0%,#87CEEB 100%);transform:scale(1.1);box-shadow:0 4px 12px #87cefa66}.header-logo{text-align:center;justify-self:center}.scan-attendance-btn{background:linear-gradient(135deg,#28a745 0%,#229954 100%);color:#fff;border:none;padding:8px 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ease}.btn-back:hover{background:var(--primary-color);color:#fff}.dashboard{padding:20px;max-width:1400px;margin:0 auto}.dashboard-title{font-size:2.5rem;color:#2c3e50;margin-bottom:10px;font-weight:600;text-align:center}.dashboard-subtitle{font-size:1.1rem;color:#7f8c8d;margin-bottom:40px;text-align:center}.component-card-wrapper{position:relative}.component-card{background:white;border-radius:15px;padding:30px;text-align:center;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #0000001a;border:2px solid transparent;position:relative;min-height:180px;display:flex;flex-direction:column;justify-content:center}.component-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px #87cefa4d;border-color:#87ceeb}.component-card.register-staff-card{background:linear-gradient(135deg,#f8f9fa 0%,#e9ecef 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ease}.action-btn:hover{background:var(--primary-color);color:#fff}.action-btn.delete{border-color:var(--error);color:var(--error)}.action-btn.delete:hover{background:var(--error);color:#fff}.loading,.empty-state{text-align:center;padding:40px;color:var(--text-light)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal-content{background:white;border-radius:20px;max-height:95vh;overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column;box-shadow:0 8px 32px #0003}.modal-small{width:90%;max-width:400px}.modal-medium{width:90%;max-width:600px}.modal-large{width:90%;max-width:900px}.modal-header h2{margin:0;color:var(--secondary-color);font-size:1.5rem}.modal-close{background:none;border:none;font-size:2rem;color:var(--text-light);cursor:pointer;padding:0;width:30px;height:30px;display:flex;align-items:center;justify-content:center;transition:color .3s 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th:nth-child(8){min-width:150px}.students-table th:nth-child(9){min-width:150px}.students-table th:nth-child(10){min-width:180px}.students-table td{padding:16px 12px;vertical-align:middle;white-space:nowrap;font-size:14px;overflow:hidden;text-overflow:ellipsis}.student-photo{width:50px;height:50px;border-radius:50%;object-fit:cover;border:2px solid #87CEEB;box-shadow:0 2px 8px #87cefa33}.student-photo-placeholder{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#87CEEB 0%,#ADD8E6 100%);color:#fff;font-size:1.2rem;font-weight:600;border:2px solid #87CEEB;box-shadow:0 2px 8px #87cefa33}.student-info{color:#7f8c8d}.gender-badge{display:inline-block;padding:6px 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768px){.students-page{padding:15px}.page-header{margin-bottom:25px;padding:20px 0}.back-button{position:relative;top:0;left:0;margin-bottom:15px}.page-title{font-size:1.8rem;letter-spacing:1px}.page-subtitle{font-size:.95rem}.stats-container{grid-template-columns:1fr;gap:15px;margin-bottom:25px}.stat-card{padding:20px;gap:15px}.stat-icon{font-size:2.5rem;width:60px;height:60px}.stat-number{font-size:2rem}.stat-label{font-size:.85rem}.actions-section{flex-direction:column;align-items:stretch;gap:15px;margin-bottom:20px}.action-buttons-group{width:100%;justify-content:center}.btn-register,.btn-reports{flex:1;min-width:0;padding:12px 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#e0e0e0;position:sticky;top:0;background:white;z-index:10}.modal-header h2{font-size:1.5rem;color:#2c3e50;margin:0}.modal-close{background:none;border:none;font-size:2rem;color:#7f8c8d;cursor:pointer;padding:0;width:30px;height:30px;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.modal-close:hover{color:#e74c3c;transform:rotate(90deg)}.activity-form{display:flex;flex-direction:column;gap:20px}.form-label{font-size:.9rem;font-weight:600;color:#2c3e50}.form-input,.form-select,.form-textarea{padding:12px 15px;border:2px solid #e0e0e0;border-radius:8px;font-size:.95rem;transition:all .3s ease;font-family:inherit}.form-textarea{resize:vertical;min-height:100px;max-height:150px;overflow-y:auto}.form-actions{display:flex;gap:15px;justify-content:flex-end;margin-top:10px}.btn{padding:12px 24px;border:none;border-radius:8px;cursor:pointer;font-size:1rem;font-weight:600;transition:all .3s ease}.btn-cancel:hover{background:#d0d0d0}.btn-submit:hover{transform:translateY(-2px);box-shadow:0 4px 12px #87cefa4d}@media (max-width: 768px){.page-header{padding:20px 0}.back-button{position:relative;top:0;margin-bottom:20px}.filter-section{flex-direction:column;align-items:stretch}.stats-section{grid-template-columns:1fr}.activity-header{flex-direction:column}.form-row{grid-template-columns:1fr}.modal-content{width:95%;margin:20px}}.create-qr-code{padding:20px}.qr-container{background:white;border-radius:20px;padding:40px;box-shadow:var(--box-shadow);max-width:800px;margin:0 auto}.qr-settings{margin-bottom:30px}.form-group label{display:block;margin-bottom:8px;font-weight:600;color:var(--text-color)}.form-group input,.form-group select{width:100%;padding:12px;border:2px solid rgba(135,206,250,.3);border-radius:10px;font-size:1rem}.form-group 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24px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-submit{background:linear-gradient(135deg,#3498db 0%,#2980b9 100%);color:#fff}.btn-submit:hover{background:linear-gradient(135deg,#2980b9 0%,#3498db 100%);transform:translateY(-2px);box-shadow:0 4px 12px #3498db66}@media (max-width: 768px){.form-row{grid-template-columns:1fr}.grades-checkbox-container{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}}.communication-page{padding:20px;max-width:1400px;margin:0 auto;width:100%;min-height:100vh}.back-button{background:linear-gradient(135deg,#87CEEB 0%,#ADD8E6 100%);color:#fff;border:none;padding:12px 24px;border-radius:25px;cursor:pointer;font-size:1rem;font-weight:500;margin-bottom:20px;transition:all .3s ease}.back-button:hover{transform:translateY(-2px);box-shadow:0 4px 15px #87cefa66}.page-title{font-size:2.5rem;color:#2c3e50;margin-bottom:10px}.page-subtitle{color:#7f8c8d;font-size:1.1rem}.communication-tabs{display:flex;gap:10px;margin-bottom:20px;border-bottom:2px solid #e0e0e0}.tab-btn{padding:12px 24px;border:none;background:transparent;cursor:pointer;font-size:1rem;font-weight:500;color:#7f8c8d;border-bottom:3px solid transparent;transition:all .3s ease;position:relative}.tab-btn.active{color:#3498db;border-bottom-color:#3498db}.tab-badge{background:#e74c3c;color:#fff;border-radius:12px;padding:2px 8px;font-size:.75rem;margin-left:8px}.chat-container{display:grid;grid-template-columns:300px 1fr;gap:20px;height:calc(100vh - 250px);background:white;border-radius:15px;box-shadow:0 4px 15px #0000001a;overflow:hidden}.staff-sidebar{background:#f8f9fa;border-right:2px solid #e0e0e0;display:flex;flex-direction:column}.sidebar-header{padding:20px;display:flex;justify-content:space-between;align-items:center;border-bottom:2px solid #e0e0e0}.sidebar-header 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