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ease}.search-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.btn-download{background:#48bb78;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:.5rem;transition:all .2s ease;box-shadow:0 4px 12px #48bb784d}.btn-download:hover{background:#38a169;transform:translateY(-2px);box-shadow:0 6px 20px #48bb7866}.btn-download:active{transform:translateY(0)}.table-wrapper{overflow-x:auto;border-radius:12px;border:1px solid #e2e8f0}.student-table{width:100%;border-collapse:collapse;font-size:.9rem}.student-table thead{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.student-table th{padding:1rem;text-align:left;font-weight:600;letter-spacing:.5px;text-transform:uppercase;font-size:.8rem;white-space:nowrap}.student-table th:first-child{border-radius:12px 0 0}.student-table th:last-child{border-radius:0 12px 0 0}.student-table tbody tr{background:#fff;border-bottom:1px solid #f7fafc;transition:all .2s ease}.student-table tbody tr:hover{background:#f7fafc}.student-table tbody tr:last-child{border-bottom:none}.student-table td{padding:1rem;color:#2d3748}.empty-state{text-align:center;padding:3rem 1rem;color:#718096;font-style:italic}.action-buttons{display:flex;gap:.5rem}.btn-edit,.btn-delete{background:none;border:none;padding:.5rem;border-radius:6px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.btn-edit{color:#4299e1;background:#ebf8ff}.btn-edit:hover{background:#4299e1;color:#fff;transform:scale(1.1)}.btn-delete{color:#f56565;background:#fff5f5}.btn-delete:hover{background:#f56565;color:#fff;transform:scale(1.1)}.table-footer{display:flex;justify-content:space-between;align-items:center;margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid #e2e8f0;font-size:.9rem;color:#718096}.student-count{font-weight:500}@media (max-width: 768px){.table-container{padding:1.5rem}.table-header{flex-direction:column;align-items:stretch}.search-box{max-width:100%}.btn-download{width:100%;justify-content:center}.table-wrapper{border-radius:8px}.student-table{font-size:.85rem}.student-table th,.student-table td{padding:.75rem .5rem}.action-buttons{flex-direction:column}}@media (max-width: 480px){.student-table thead{display:none}.table-row{display:block;margin-bottom:1rem;border:1px solid #e2e8f0;border-radius:8px}.table-row td{display:flex;align-items:center;padding:.75rem 1rem;border-bottom:1px solid #f7fafc}.table-row td:last-child{border-bottom:none}.table-row td:before{content:attr(data-label);font-weight:600;color:#4a5568;min-width:80px;margin-right:.5rem}}.loading-container{background:#fff;border-radius:16px;padding:4rem 2rem;text-align:center;box-shadow:0 4px 6px #0000001a;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px}.loading-spinner{width:60px;height:60px;border:4px solid #e2e8f0;border-top:4px solid #667eea;border-radius:50%;animation:spin 1s linear infinite;margin-bottom:2rem;box-shadow:0 0 20px #667eea33}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-title{font-size:1.5rem;font-weight:600;color:#1a202c;margin-bottom:.5rem}.loading-subtitle{color:#718096;font-size:.95rem;font-weight:400}@media (max-width: 768px){.loading-container{padding:3rem 1.5rem;min-height:300px}.loading-spinner{width:50px;height:50px;border-width:3px;margin-bottom:1.5rem}.loading-title{font-size:1.25rem}.loading-subtitle{font-size:.9rem}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:2rem 1rem;color:#1a202c;line-height:1.6}#root{max-width:1200px;margin:0 auto}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}