:root{--primary-bg: #2f4f4f;--accent-color: #fff;--hover-color: #ff8c00;--secondary-bg: #f8f9fa;--shadow-color: #ddd;--spacing-unit: 20px}.error{text-align:center;color:#e63946;margin-bottom:var(--spacing-unit)}.student-link{color:var(--hover-color);text-decoration:none;transition:color .3s ease}.student-link:hover{color:darken(var(--hover-color),10%)}.student-list-container{margin:var(--spacing-unit) auto;padding:var(--spacing-unit);background-color:#fff;border-radius:8px;box-shadow:0 2px 5px var(--shadow-color)}.student-list-title{color:var(--primary-bg);margin-bottom:var(--spacing-unit);font-size:1.5rem;text-align:center}.student-table-wrapper{overflow-x:auto;margin-bottom:var(--spacing-unit)}.student-table{width:100%;min-width:1600px;border-collapse:collapse}.student-table th,.student-table td{padding:calc(var(--spacing-unit) * .75);text-align:left;border-bottom:1px solid var(--shadow-color);white-space:nowrap}.student-table th{background-color:var(--primary-bg);color:var(--accent-color);font-weight:600}.student-table tr:nth-child(2n){background-color:var(--secondary-bg)}.student-table tr:hover{background-color:#f4a2611a}.loading{text-align:center;color:var(--hover-color)}.pagination{display:flex;justify-content:center;align-items:center;gap:var(--spacing-unit)}.pagination-btn{background-color:var(--primary-bg);color:var(--accent-color);border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;transition:background-color .3s ease,color .3s ease}.pagination-btn:hover:not(:disabled){background-color:var(--hover-color);color:#fff}.pagination-btn:disabled{opacity:.5;cursor:not-allowed}.pagination-info{color:var(--primary-bg);font-weight:500}.btn{padding:5px 10px;border-radius:4px;text-decoration:none;transition:background-color .3s ease}.btn-sm{font-size:.875rem}.btn-primary{background-color:var(--primary-bg);color:var(--accent-color);border:none}.btn-primary:hover{background-color:darken(var(--primary-bg),10%)}.student-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.student-controls{display:flex;gap:15px;align-items:center}.search-input{padding:8px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px;width:200px;transition:border-color .3s ease}.search-input:focus{outline:none;border-color:#007bff;box-shadow:0 0 5px #007bff4d}.create-btn{padding:8px 16px;font-size:14px}@media (max-width: 768px){.student-header{flex-direction:column;gap:15px}.search-input{width:100%}}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background-color:#fff;padding:20px;border-radius:8px;width:90%;max-width:600px;max-height:80vh;overflow-y:auto;box-shadow:0 4px 10px #0003}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.modal-header h3{margin:0;font-size:20px;color:#333}.close-btn{background:none;border:none;font-size:24px;cursor:pointer;color:#666;transition:color .3s ease}.close-btn:hover{color:#333}.error{color:#dc3545;text-align:center;margin-bottom:15px;font-size:14px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-bottom:20px}.form-group{display:flex;flex-direction:column;gap:5px}.form-group label{font-size:14px;color:#333}.required{color:#dc3545}.form-group input,.form-group select{padding:8px;border:1px solid #ddd;border-radius:4px;font-size:14px;width:100%}.form-group input:focus,.form-group select:focus{outline:none;border-color:#007bff;box-shadow:0 0 5px #007bff4d}.profile-picture-group{grid-column:span 2;text-align:center}.profile-picture-container{display:flex;flex-direction:column;align-items:center;gap:10px}.profile-preview{width:100px;height:100px;-o-object-fit:cover;object-fit:cover;border-radius:50%;border:2px solid #ddd}.profile-placeholder{width:100px;height:100px;display:flex;align-items:center;justify-content:center;background-color:#f5f5f5;border-radius:50%;border:2px solid #ddd;color:#666;font-size:14px}.profile-input{margin-top:10px}.modal-actions{display:flex;justify-content:flex-end;gap:10px}.btn{padding:8px 16px;border:none;border-radius:4px;cursor:pointer;font-size:14px}.btn-primary{background-color:#007bff;color:#fff}.btn-primary:hover{background-color:#0056b3}.btn-secondary{background-color:#6c757d;color:#fff}.btn-secondary:hover{background-color:#5a6268}@media (max-width: 768px){.form-grid{grid-template-columns:1fr}.profile-picture-group{grid-column:span 1}}