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#e8eaed;margin-bottom:40px;padding-bottom:25px;text-align:center;width:100%}.cohort-header h2{color:#333;font-size:2.2rem;font-weight:700;margin-bottom:12px;text-align:center}.cohort-description{color:#666;font-size:1.05rem;line-height:1.6;margin:0 auto;max-width:800px}.proficiency-ratings-section{background:#f8f9fa;border:1px solid #e8eaed;border-radius:12px;box-shadow:0 2px 8px #00000014;padding:30px}.proficiency-ratings-section h3{border-bottom:1px solid #dee2e6;color:#333;font-size:1.6rem;font-weight:600;margin-bottom:25px;padding-bottom:15px}.rating-overall{color:var(--color-primary);font-size:1.2rem;text-align:center}.cohort-section{display:flex;justify-content:center;margin-top:20px}.cohort-badge{align-items:center;border-radius:25px;box-shadow:0 4px 15px #0d94884d;display:flex;gap:12px;padding:12px 24px;transition:transform .3s ease,box-shadow .3s ease}.cohort-badge:hover{box-shadow:0 6px 20px 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p.no-bio{color:#999;font-style:italic}.tutor-rating-section{background:#f8f9fa;border-radius:10px;margin-top:15px;padding:20px;text-align:center}.rating-label{color:#666;font-size:.9rem;margin:0 0 15px}.star-rating{display:flex;gap:8px;justify-content:center;margin-bottom:15px}.star{background:none;border:none;color:#ddd;cursor:pointer;font-size:2rem;line-height:1;padding:0;transition:all .2s ease}.star:hover{transform:scale(1.2)}.star.filled,.star:hover{color:#ffc107}.your-rating{color:var(--color-primary);font-size:.9rem;font-weight:600;margin:8px 0 5px;text-align:center}.average-rating{color:#888;font-size:.85rem;font-style:italic;margin:5px 0 0;text-align:center}.btn-rate-tutor{background:var(--gradient-primary-simple);border:none;border-radius:8px;color:#fff;cursor:pointer;font-size:.9rem;font-weight:500;margin-top:12px;padding:8px 16px;transition:all .3s ease;width:100%}.btn-rate-tutor:hover{box-shadow:0 4px 12px #0d94884d;transform:translateY(-2px)}.tutor-rating-form{padding:20px}.tutor-rating-form .form-group{margin-bottom:20px}.tutor-rating-form label{color:#333;display:block;font-weight:500;margin-bottom:8px}.star-rating-form{display:flex;gap:10px;justify-content:center;margin:15px 0}.star-form{background:none;border:none;color:#ddd;cursor:pointer;font-size:2.5rem;line-height:1;padding:0;transition:all .2s ease}.star-form:hover{color:#ffc107;transform:scale(1.2)}.star-form.filled{color:#ffc107}.selected-rating-text{color:var(--color-primary);font-size:.95rem;font-weight:600;margin-top:10px;text-align:center}.feedback-textarea{border:1px solid #ddd;border-radius:8px;box-sizing:border-box;font-family:inherit;font-size:.95rem;min-height:100px;padding:12px;resize:vertical;width:100%}.feedback-textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #0d94881a;outline:none}.character-count{color:#999;font-size:.8rem}.sticker-section{display:flex;justify-content:center;margin:35px 0}.sticker-badge{align-items:center;background:linear-gradient(135deg,var(--color-primary)20 0,var(--color-primary-dark)40 100%);border:2px solid var(--color-primary);border-radius:15px;box-shadow:0 6px 20px #0d948826;display:flex;flex-direction:column;gap:15px;margin:0 auto;max-width:600px;overflow:hidden;padding:25px 30px;position:relative;text-align:center;transition:transform .3s ease,box-shadow .3s ease;width:100%}.sticker-badge:before{background:linear-gradient(45deg,#0000 30%,#ffffff1a 50%,#0000 70%);bottom:0;content:"";left:0;position:absolute;right:0;top:0;transform:translateX(-100%);transition:transform .6s ease}.sticker-badge:hover{box-shadow:0 8px 25px #0d948840;transform:translateY(-3px)}.sticker-badge:hover:before{transform:translateX(100%)}.sticker-icon{filter:drop-shadow(0 2px 4px rgba(0,0,0,.1));flex-shrink:0;font-size:3.5rem}.sticker-content{flex:1 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var(--color-primary);border-radius:12px;padding:20px}.review-section h3{align-items:center;color:#333;display:flex;font-size:1.3rem;font-weight:600;gap:10px;margin:0 0 15px}.review-section h3:before{background:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none' stroke='%230ea5e9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2'/%3E%3Crect width='8' height='4' x='8' y='2' rx='1' ry='1'/%3E%3Cpath d='M12 11h4M12 16h4M8 11h.01M8 16h.01'/%3E%3C/svg%3E") no-repeat 50%;background-size:contain;content:"";display:inline-block;height:20px;margin-right:8px;vertical-align:middle;width:20px}.overview-info{grid-gap:15px;display:grid;gap:15px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.info-item{background:#fff;border:1px solid #e0e0e0;font-size:.9rem;padding:12px 15px}.info-item strong{color:var(--color-primary);margin-right:8px}.responses-grid{grid-gap:15px;display:grid;gap:15px}.response-item{background:#fff;border:1px solid #e0e0e0;border-radius:8px;padding:15px}.response-item h4{color:#333;font-size:1rem;font-weight:600;margin:0 0 10px}.response-item p{color:#555;font-size:.9rem;line-height:1.5;margin:0}.work-links{display:flex;flex-direction:column;gap:8px}.work-link{background:#f0f4ff;border-radius:5px;color:var(--color-primary);font-size:.9rem;padding:5px 10px;text-decoration:none;transition:all .3s ease}.work-link:hover{background:#e0e8ff;text-decoration:underline}.feedback-content{background:#fff;border:1px solid #e0e0e0;border-radius:8px;padding:20px;position:relative}.feedback-content p{color:#555;font-size:1rem;font-style:italic;line-height:1.6;margin:0 0 15px}.feedback-author{color:var(--color-primary);font-size:.9rem;font-weight:600;text-align:right}.solution-content{background:#fff;border:1px solid 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.stat-subtitle{font-size:14px;margin:0;opacity:.8}.stats-card{background:var(--gradient-primary-simple);border-radius:8px;color:#fff;margin-bottom:20px;padding:20px;text-align:center}.stat-value{font-size:48px;font-weight:700;margin-top:10px}.grades-list{margin-top:20px}.grade-item{background:#f9f9f9;border-left:4px solid var(--color-primary);border-radius:5px;margin-bottom:15px;padding:15px}.grade-item h4{color:#333;margin:0 0 10px}.grade-score{color:var(--color-primary);font-size:20px;font-weight:700;margin-bottom:10px}.grade-feedback{color:#555;line-height:1.6;margin:10px 0}.grade-date,.submission-date{color:#999;font-size:12px;margin-top:5px}.submission-content{background:#f5f5f5;border-radius:5px;margin:15px 0}.graded-info{background:#e8f5e9;border-radius:5px;color:#2e7d32;margin-top:20px;padding:15px}@media (max-width:768px){.dashboard-content{grid-template-columns:1fr}.challenges-list,.students-list,.submissions-list{max-height:300px}}.mentor-content{background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a;padding:30px}.challenges-overview{margin-bottom:30px}.challenges-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.challenge-card{background:#f9f9f9;border-radius:8px;padding:20px;transition:all .2s}.challenge-card:hover{box-shadow:0 4px 8px #0000001a}.challenge-card h3{color:#333;font-size:18px;margin:0 0 10px}.challenge-desc{color:#666;font-size:14px;line-height:1.5;margin-bottom:15px}.challenge-meta{align-items:center;justify-content:space-between}.student-info{background:#f5f5f5;border-radius:8px;margin-top:20px;padding:20px}.student-info h2{margin-top:0}.student-info p{color:#555;margin:10px 0}.proficiency-section{background:#f8f9fa;border:1px solid #e9ecef;border-radius:10px;margin-bottom:30px;padding:25px}.proficiency-section h3{color:#333;font-size:22px;font-weight:600;margin:0 0 10px}.proficiency-categories{grid-gap:15px;display:grid;gap:15px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.proficiency-item{background:#fff;border:1px solid #dee2e6;border-radius:8px;padding:15px;transition:all .2s ease}.proficiency-item:hover{box-shadow:0 4px 12px #0000001a;transform:translateY(-2px)}.proficiency-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:10px}.category-name{color:#495057;font-size:14px;font-weight:600}.category-score{font-size:16px;font-weight:700}.category-rating,.stat-rating-container{align-items:center;display:flex}.stat-rating-container{justify-content:center}.star-rating-display{align-items:center;display:flex;flex-direction:column;gap:.5rem}.rating-text{color:#666;font-size:.875rem;font-weight:500}.no-rating-text{color:#999;font-style:italic}.proficiency-bar{background-color:#e9ecef;border-radius:4px;height:8px;overflow:hidden;width:100%}.proficiency-fill{border-radius:4px;height:100%;transition:width .3s ease}.completed-challenges-section{background:#fff;border:1px solid #e9ecef;border-radius:10px;margin-bottom:30px;padding:25px}.completed-challenges-section h3{color:#333;font-size:22px;font-weight:600;margin:0 0 10px}.challenges-grid{grid-gap:20px;gap:20px;margin-top:20px}.completed-challenge-card{background:#f8f9fa;border:1px solid #dee2e6;border-radius:10px;padding:20px;transition:all .2s ease}.completed-challenge-card:hover{box-shadow:0 6px 20px #0000001a;transform:translateY(-3px)}.challenge-header h4{color:#333;flex:1 1;font-size:18px;font-weight:600;margin:0 10px 0 0}.category-badge{background:#e3f2fd;border-radius:20px;color:#1976d2;font-size:12px;font-weight:600;letter-spacing:.5px;padding:4px 12px;text-transform:uppercase}.challenge-grade{align-items:center;background:#fff;border:1px solid #e9ecef;border-radius:8px;display:flex;justify-content:space-between;margin-bottom:15px;padding:15px}.grade-score{color:#495057;font-size:16px;font-weight:600}.grade-percentage{font-size:18px;font-weight:700}.challenge-meta{color:#6c757d;font-size:13px;margin-bottom:10px}.challenge-meta p{margin:3px 0}.challenge-feedback{background:#e7f3ff;border:1px solid #b8daff;border-radius:6px;margin-top:10px;padding:12px}.challenge-feedback p{color:#004085;font-size:14px;line-height:1.5;margin:0}.weekly-progress-section{background:#fff;border:1px solid #e9ecef;border-radius:10px;padding:25px}.weekly-progress-section h3{color:#333;font-size:22px;font-weight:600;margin:0 0 10px}.histogram-container{background:#f8f9fa;border:1px solid #dee2e6;border-radius:8px;margin-top:20px;padding:20px}.histogram{align-items:end;display:flex;gap:8px;height:300px;justify-content:space-between;overflow-x:auto;padding:20px 0}.histogram-bar-container{align-items:center;display:flex;flex:1 1;flex-direction:column;min-width:60px}.histogram-bar{border-radius:4px 4px 0 0;cursor:pointer;margin-bottom:10px;max-width:50px;min-height:20px;transition:all .3s ease;width:100%}.histogram-bar:hover{opacity:.8;transform:scaleY(1.05)}.histogram-label{color:#6c757d;font-size:11px;height:40px;margin-bottom:5px;text-orientation:mixed;writing-mode:vertical-rl}.histogram-label,.histogram-value{align-items:center;display:flex;justify-content:center;text-align:center}.histogram-value{color:#495057;font-size:12px;font-weight:600}.no-data{background:#f8f9fa;border:1px solid #dee2e6;border-radius:8px;color:#6c757d;font-style:italic;padding:40px;text-align:center}@media (max-width:1200px){.proficiency-categories{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.challenges-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}}@media (max-width:768px){.dashboard-content{gap:15px;grid-template-columns:1fr}.students-list{margin-bottom:20px;max-height:200px}.challenges-grid,.proficiency-categories{grid-template-columns:1fr}.histogram{height:200px;padding:10px 0}.histogram-label{font-size:10px;height:30px}.challenge-header{align-items:flex-start;flex-direction:column;gap:10px}.challenge-grade{flex-direction:column;gap:10px;text-align:center}}.opportunities-section{background:#f8f9fa;border:1px solid #e9ecef;border-radius:10px;margin-top:30px;padding:25px}.opportunities-section h3{color:#333;font-size:22px;font-weight:600;margin:0 0 10px}.section-subtitle{color:#6c757d;font-size:14px;font-style:italic;margin-bottom:20px}.opportunities-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));margin-top:20px}.opportunity-card{background:#fff;border:1px solid #dee2e6;border-radius:12px;box-shadow:0 2px 8px #00000014;padding:25px;transition:all .3s ease}.opportunity-card:hover{box-shadow:0 8px 25px #00000026;transform:translateY(-3px)}.opportunity-submit-card{background:#fff;border:1px solid #dee2e6;border-radius:12px;box-shadow:0 2px 8px #00000014;margin-bottom:20px;padding:20px}.opportunity-submit-header h3{color:#2c3e50;font-size:18px;margin:0 0 5px}.opportunity-submit-header p{color:#6c757d;font-size:13px;margin:0 0 15px}.opportunity-submit-grid{grid-gap:16px;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.grade-selection{background:#fff;border:1px solid #e9ecef;border-radius:8px;padding:16px}.grade-range-row{grid-gap:16px;border-bottom:1px solid #e9ecef;display:grid;gap:16px;grid-template-columns:1fr 1fr;margin-bottom:16px;padding-bottom:16px}.grade-range-row .form-group label{font-size:13px;font-weight:500}.grade-other-section{margin-top:12px}.grade-other-label{color:#2c3e50;display:block;font-size:13px;font-weight:600;margin-bottom:10px}.grade-checkbox-grid{grid-gap:8px 16px;display:grid;gap:8px 16px;grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}.grade-checkbox{font-weight:400;margin:0}.opportunity-submit-actions{display:flex;justify-content:flex-end;margin-top:10px}.message{font-size:13px;margin-bottom:12px;padding:10px 12px}.message.error{background:#fcebea;color:#cc1f1a}.message.success{background:#eafaf1;border:1px solid #c9f0d8;color:#1e7e34}.opportunity-header{align-items:flex-start;display:flex;justify-content:space-between;margin-bottom:15px}.opportunity-header h4{color:#333;flex:1 1;font-size:18px;font-weight:600;line-height:1.3;margin:0 15px 0 0}.opportunity-type-badge{background:#e3f2fd;border-radius:20px;color:#1976d2;font-size:12px;font-weight:600;letter-spacing:.5px;padding:6px 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#e9ecef;padding-top:20px}.opportunity-meta{margin-bottom:15px}.opportunity-meta p{align-items:center;color:#6c757d;display:flex;font-size:13px;margin:8px 0}.opportunity-meta strong{color:#495057;font-weight:600;min-width:140px}.opportunity-link{color:var(--color-primary);display:inline-block;font-weight:600;margin-top:12px;text-decoration:none}.opportunity-link:hover{text-decoration:underline}.parent-sidebar-student-wrapper{margin-bottom:8px}.parent-sidebar-options{border-left:2px solid #0d94884d;display:flex;flex-direction:column;gap:4px;margin-left:12px;margin-top:8px;padding-left:12px}.parent-sidebar-option{align-items:center;background:#0000;border:none;border-radius:6px;color:#555;cursor:pointer;display:flex;font-size:14px;gap:8px;padding:8px 12px;text-align:left;transition:all .2s}.parent-sidebar-option:hover{background:#f0f0f0;color:#333}.parent-sidebar-option.active{background:#0d948826;color:var(--color-primary);font-weight:600}.parent-sidebar-option 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h4{color:#333;margin:0 0 8px}.cohort-meta{color:#666;font-size:13px;margin:0 0 12px}.cohort-select-link{color:var(--color-primary);font-size:14px;font-weight:600}.opportunity-requirements{margin-bottom:15px}.opportunity-requirements p{color:#6c757d;font-size:13px;font-weight:600;margin:8px 0}.opportunity-requirements ul{margin:8px 0 0 20px;padding:0}.opportunity-requirements li{color:#6c757d;font-size:13px;line-height:1.4;margin:5px 0}.opportunity-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}.opportunity-tag{background:#f8f9fa;border:1px solid #dee2e6;border-radius:15px;color:#6c757d;font-size:11px;font-weight:500;padding:4px 10px}.opportunity-actions{align-items:center;display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.planner-section{max-width:100%}.planner-calendar{display:flex;flex-direction:column;gap:2rem}.planner-month-block{background:#fafbfc;border:1px solid #e8ecf0;border-radius:12px;box-shadow:0 1px 3px #0000000a;padding:1.25rem 1.5rem}.planner-month-header{border-bottom:2px solid var(--color-primary);color:#2d3748;display:inline-block;font-size:1.25rem;font-weight:600;letter-spacing:.02em;margin:0 0 1rem;padding-bottom:.5rem}.planner-month-grid{margin-top:0}.opportunity-prep-options{align-items:center;border-top:1px solid #eee;display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 0;padding-top:12px}.opportunity-prep-options .prep-label{color:#555;font-size:13px;font-weight:600;margin-right:4px}.interest-btn{background:#f8f9fa;border:1px solid #ddd;border-radius:8px;color:#555;cursor:pointer;font-size:12px;font-weight:500;padding:6px 12px;transition:all .2s ease}.interest-btn:hover{background:#e9ecef;border-color:#ccc}.interest-btn.active{background:#e7f3ff;border-color:#06c;color:#06c}.interest-btn.active:hover{background:#cce5ff}.planner-add-btn,.planner-remove-btn{border:none;border-radius:8px;cursor:pointer;font-size:13px;font-weight:500;padding:8px 16px;transition:all .2s ease}.planner-add-btn{background:#e7f3ff;color:#06c}.planner-add-btn:hover{background:#cce5ff}.planner-remove-btn{background:#fff5f5;color:#c33}.planner-remove-btn:hover{background:#ffe5e5}.planner-added-by-parent,.planner-added-by-student{color:#6c757d;font-size:12px;font-style:italic}.register-button{background:linear-gradient(135deg,#28a745,#20c997);border-radius:8px;box-shadow:0 3px 10px #28a7454d;color:#fff;display:inline-block;font-size:14px;font-weight:600;padding:12px 24px;text-decoration:none;transition:all .3s ease}.register-button:hover{background:linear-gradient(135deg,#218838,#1ea085);box-shadow:0 5px 15px #28a74566;color:#fff;text-decoration:none;transform:translateY(-2px)}@media (max-width:768px){.opportunities-grid{grid-template-columns:1fr}.opportunity-header{align-items:flex-start;flex-direction:column;gap:10px}.opportunity-header h4{margin-right:0}.opportunity-meta strong{min-width:120px}}.subscription-section{background:#fff;border:1px solid #e0e0e0;border-radius:8px;box-shadow:0 2px 4px #0000001a;margin-top:20px;padding:25px}.subscription-section h2{color:#333;font-size:1.5rem;font-weight:600;margin-bottom:15px}.subscription-info{gap:15px}.subscription-info p{color:#666;line-height:1.5;margin:0}.upgrade-button{align-self:flex-start;border:none;border-radius:6px;box-shadow:0 2px 8px #0d94884d;color:#fff;cursor:pointer;font-size:16px;font-weight:600;padding:12px 24px;transition:all .3s ease}.upgrade-button,.upgrade-button:hover{background:var(--gradient-primary-simple)}.upgrade-button:hover{box-shadow:0 4px 12px #0d948866;transform:translateY(-2px)}.upgrade-button:active{transform:translateY(0)}.student-sticker-small{align-items:center;border:1px solid;border-radius:8px;box-shadow:0 2px 4px #0000001a;display:flex;font-size:.85rem;font-weight:600;gap:8px;margin:10px 0;padding:8px 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2px 4px rgba(0,0,0,.1));flex-shrink:0;font-size:2.5rem}.sticker-content-large{flex:1 1;min-width:0}.sticker-title-large{font-size:1.6rem;font-weight:700;line-height:1.2;margin-bottom:6px;text-shadow:0 1px 2px #0000001a}.sticker-description-large{font-size:.95rem;font-weight:500;line-height:1.4;opacity:.9}.survey-section{background:#f8f9fa;border-radius:12px;box-shadow:0 4px 15px #0000001a;margin:40px auto;max-width:1200px;padding:40px 20px;width:100%}.survey-section h2{color:#333;font-size:2rem;font-weight:700;margin-bottom:20px;text-align:center}.survey-content{grid-gap:40px;align-items:center;display:grid;gap:40px;grid-template-columns:1fr 1fr;margin:0 auto;max-width:1000px}.survey-info p{color:#666;font-size:1.1rem;line-height:1.6;margin-bottom:30px}.survey-benefits{display:flex;flex-direction:column;gap:15px}.benefit-item{align-items:center;display:flex;gap:12px;padding:12px 0}.benefit-icon{flex-shrink:0;font-size:1.5rem}.benefit-item span:last-child{color:#555;font-weight:500}.survey-actions{align-items:center;display:flex;flex-direction:column;gap:20px}.survey-button.single-survey{font-size:1.1rem;max-width:400px;padding:18px 32px;width:100%}.survey-button{align-items:center;border:none;border-radius:10px;box-shadow:0 4px 12px #0000001a;cursor:pointer;display:flex;font-size:1rem;font-weight:600;gap:12px;justify-content:center;padding:18px 25px;text-decoration:none;transition:all .3s ease;width:100%}.survey-button.primary{background:var(--gradient-primary-simple);color:#fff}.survey-button.primary:hover{background:var(--gradient-primary-simple);box-shadow:0 6px 20px #0d94884d;transform:translateY(-2px)}.survey-button.secondary{background:linear-gradient(135deg,#28a745,#20c997);color:#fff}.survey-button.secondary:hover{background:linear-gradient(135deg,#218838,#1e7e34);box-shadow:0 6px 20px #28a7454d;transform:translateY(-2px)}.button-icon{font-size:1.2rem}@media 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h3{color:#333;font-size:1.2rem;font-weight:600;margin:0 0 20px}.form-grid{grid-template-columns:repeat(2,1fr)}.form-group.full-width{grid-column:1/-1}.form-group label{font-size:.95rem}.form-group input,.form-group textarea{border:1px solid #ddd;border-radius:6px;font-family:inherit;font-size:.95rem;padding:10px 12px;transition:border-color .3s ease,box-shadow .3s ease}.form-group input:focus,.form-group textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #0d94881a;outline:none}.form-group textarea{min-height:100px;resize:vertical}.form-hint{color:#6b7280;font-size:.85rem;margin-top:6px}.profile-modal .modal-actions{border-top:1px solid #e0e0e0;display:flex;gap:10px;justify-content:flex-end;margin-top:20px;padding-top:20px}.student-management{margin:0 auto;max-width:1200px;padding:20px}.management-header{align-items:center;border-bottom:2px solid #e9ecef;display:flex;justify-content:space-between;margin-bottom:30px;padding-bottom:20px}.management-header 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.2s}.btn-secondary:hover{background:#5a6268}.btn-danger{background:#dc3545;border:none;border-radius:6px;color:#fff;cursor:pointer;font-size:.9rem;font-weight:500;padding:8px 16px;transition:background .2s}.btn-danger:hover{background:#c82333}.btn-outline{background:#0000;border:1px solid var(--color-primary);border-radius:6px;color:var(--color-primary);cursor:pointer;font-size:.9rem;font-weight:500;padding:8px 16px;transition:all .2s}.btn-outline:hover{background:var(--color-primary);color:#fff}.loading-container{align-items:center;color:#6c757d;display:flex;flex-direction:column;height:400px;justify-content:center}.loading-spinner{animation:spin 1s linear infinite;border:4px solid #f3f3f3;border-radius:50%;border-top:4px solid var(--color-primary);height:40px;margin-bottom:20px;width:40px}.empty-state{color:#6c757d;padding:60px 20px}.empty-icon{font-size:4rem;margin-bottom:20px}.empty-state h3{color:#495057;font-size:1.5rem;margin:0 0 10px}.empty-state p{font-size:1.1rem;line-height:1.5;margin:0 0 25px}.challenges-grid{grid-gap:25px;display:grid;gap:25px;grid-template-columns:repeat(auto-fill,minmax(350px,1fr))}.challenge-card{background:#fff;border:1px solid #e0e0e0;border-radius:12px;box-shadow:0 2px 10px #0000001a;padding:25px;transition:transform .2s,box-shadow .2s}.challenge-card:hover{box-shadow:0 4px 20px #00000026;transform:translateY(-2px)}.challenge-card.big-challenge{border-left:4px solid var(--color-primary)}.challenge-header{align-items:flex-start;display:flex;justify-content:space-between;margin-bottom:15px}.challenge-header h3{color:#333;flex:1 1;font-size:1.3rem;font-weight:600;margin:0}.challenge-badges{display:flex;flex-wrap:wrap;gap:8px}.badge{border-radius:12px;font-size:.75rem;font-weight:500;padding:4px 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