.prime-checker-section,.prime-generator-section{min-height:400px}.control-group{margin-bottom:1rem}.control-group label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-primary)}.action-buttons{display:flex;gap:.75rem;flex-wrap:wrap}.stats-display{display:flex;gap:1rem;margin-bottom:1rem;padding:1rem;background:var(--bg-tertiary);border-radius:8px;border:1px solid var(--border-light)}.stat-item{display:flex;flex-direction:column;align-items:center;text-align:center;min-width:80px}.stat-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:.25rem}.stat-value{font-size:1.25rem;font-weight:700;color:var(--primary)}.result-display{min-height:200px;max-height:400px;overflow-y:auto;color:var(--text-primary);padding:1rem;background:var(--bg-secondary);border-radius:8px;border:1px solid var(--border-light)}.primes-container h4{margin-bottom:1rem;color:var(--text-primary);font-size:1.1rem}.primes-grid{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1rem}.prime-number{display:inline-block;padding:.375rem .75rem;background:var(--primary);color:#fff;border-radius:6px;font-weight:600;font-size:.875rem;color:var(--text-primary);text-align:center;min-width:40px;transition:background-color .2s}.prime-number:hover{background:var(--primary-dark)}.prime-ellipsis{display:inline-block;padding:.375rem .75rem;background:var(--bg-tertiary);color:var(--text-secondary);border-radius:6px;font-style:italic;font-size:.875rem;border:1px solid var(--border-light)}.all-primes{max-height:300px;overflow-y:auto;padding:1rem;background:var(--bg-tertiary);border-radius:6px;border:1px solid var(--border-light)}.prime-check-container{text-align:center}.result-positive{padding:1.5rem;background:linear-gradient(135deg,#d4edda,#c3e6cb);border:2px solid #28a745;border-radius:8px;color:#155724}.result-negative{padding:1.5rem;background:linear-gradient(135deg,#f8d7da,#f5c6cb);border:2px solid #dc3545;border-radius:8px;color:#721c24}.result-negative h4,.result-positive h4{margin-bottom:.75rem;font-size:1.25rem;font-weight:700}.result-negative p,.result-positive p{margin-bottom:.5rem;font-size:1rem}.calculation-info{margin-top:.75rem;padding-top:.75rem;border-top:1px solid currentColor;opacity:.8}.error-message{margin:1rem 0;padding:1rem;background:#f8d7da;color:#721c24;border:1px solid #f5c6cb;border-radius:8px;font-weight:600;text-align:center}.text-muted{color:var(--text-secondary);font-style:italic;text-align:center;padding:2rem}.instruction-list{margin:0;padding-left:1.5rem}.instruction-list li{margin-bottom:.5rem;line-height:1.5}@media (max-width:768px){.stats-display{flex-direction:column;gap:.5rem}.stat-item{flex-direction:row;justify-content:space-between;text-align:left}.action-buttons{flex-direction:column}.prime-number{min-width:35px;font-size:.8rem;padding:.25rem .5rem}.result-display{min-height:150px}}.prime-check-container,.primes-container{animation:.3s ease-out fadeInUp}@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.all-primes::-webkit-scrollbar,.result-display::-webkit-scrollbar{width:8px}.all-primes::-webkit-scrollbar-track,.result-display::-webkit-scrollbar-track{background:var(--bg-tertiary);border-radius:4px}.all-primes::-webkit-scrollbar-thumb,.result-display::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:4px}.all-primes::-webkit-scrollbar-thumb:hover,.result-display::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}