.tool-header{text-align:center;margin-bottom:40px}.header-badge{display:flex;justify-content:center;gap:12px;margin-bottom:24px;flex-wrap:wrap}.badge{background:linear-gradient(135deg, #10b981, #059669);color:white;padding:6px 18px;border-radius:40px;font-size:0.75rem;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.tool-header h1{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg, #1e293b, #10b981);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}.tool-header p{color:var(--gray-500);font-size:1rem}.core-stats{display:flex;justify-content:center;gap:24px;margin-bottom:32px;flex-wrap:wrap}.core-stat{background:white;border-radius:60px;padding:16px 28px;display:flex;align-items:center;gap:16px;box-shadow:0 4px 15px rgba(0,0,0,0.05);border:1px solid var(--gray-200)}.core-stat-icon{width:48px;height:48px;background:linear-gradient(135deg, #d1fae5, #a7f3d0);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#10b981;font-size:1.3rem}.core-stat-info{text-align:left}.core-stat-value{display:block;font-size:1.5rem;font-weight:700;color:var(--gray-800)}.core-stat-label{font-size:0.7rem;color:var(--gray-500)}.input-tabs{display:flex;gap:16px;margin-bottom:24px;justify-content:center}.input-tab{background:transparent;border:none;padding:12px 28px;cursor:pointer;transition:all 0.3s;border-radius:60px;font-weight:500}.input-tab i{margin-right:8px}.input-tab.active{background:linear-gradient(135deg, #10b981, #059669);color:white;box-shadow:0 4px 12px rgba(16,185,129,0.3)}.input-card{background:linear-gradient(135deg, #fff, #f8fafc);border-radius:24px;padding:20px;border:1px solid var(--gray-200)}.input-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-weight:600}.array-textarea{width:100%;min-height:150px;padding:16px;border:1px solid var(--gray-200);border-radius:16px;font-family:'Inter',monospace;font-size:0.9rem;resize:vertical;background:white}.array-textarea:focus{outline:none;border-color:#10b981}.input-hint{font-size:0.7rem;color:var(--gray-400);margin-top:12px}.visual-card{background:linear-gradient(135deg, #fff, #f8fafc);border-radius:24px;padding:20px;border:1px solid var(--gray-200)}.visual-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;font-weight:600}.visual-array{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;min-height:120px;padding:20px;background:var(--gray-50);border-radius:16px}.visual-item{background:linear-gradient(135deg, #10b981, #059669);color:white;padding:12px 20px;border-radius:12px;font-weight:500;cursor:pointer;transition:all 0.2s;position:relative;min-width:60px;text-align:center}.visual-item:hover{transform:scale(1.05);box-shadow:0 4px 12px rgba(16,185,129,0.3)}.visual-item .remove-item{position:absolute;top:-8px;right:-8px;width:20px;height:20px;background:#ef4444;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;cursor:pointer;opacity:0;transition:opacity 0.2s}.visual-item:hover .remove-item{opacity:1}.visual-hint{font-size:0.7rem;color:var(--gray-400);margin-top:12px;text-align:center}.reverse-options{background:var(--gray-50);border-radius:20px;padding:16px 20px;margin:20px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}.option-group{display:flex;gap:20px;flex-wrap:wrap}.option-group label{display:flex;align-items:center;gap:6px;cursor:pointer;font-size:0.8rem}.action-buttons{display:flex;gap:16px;justify-content:center;margin:20px 0;flex-wrap:wrap}.reverse-btn{background:linear-gradient(135deg, #10b981, #059669);padding:12px 32px;font-size:1rem;border-radius:50px}.btn-outline{background:transparent;border:1px solid var(--gray-300);padding:10px 24px;border-radius:50px;font-weight:500;cursor:pointer;transition:all 0.3s}.btn-outline:hover{background:var(--gray-100);border-color:#10b981;color:#10b981}.result-area{background:white;border-radius:24px;overflow:hidden;border:1px solid var(--gray-200);animation:fadeIn 0.3s ease;margin-top:20px}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.result-title{font-weight:600;display:flex;align-items:center;gap:8px}.array-display{padding:20px;border-bottom:1px solid var(--gray-200)}.display-label{font-size:0.8rem;font-weight:500;color:var(--gray-600);margin-bottom:16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.array-badge{background:#e0e7ff;color:#1e40af;padding:2px 10px;border-radius:20px;font-size:0.7rem}.array-badge.success{background:#d1fae5;color:#065f46}.array-items{display:flex;flex-wrap:wrap;gap:12px}.array-item{background:linear-gradient(135deg, #3b82f6, #2563eb);color:white;padding:12px 18px;border-radius:12px;font-family:monospace;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,0.1);transition:all 0.2s}.array-item.swapping{background:#f59e0b;transform:scale(1.05)}.step-display{padding:20px;border-bottom:1px solid var(--gray-200);background:var(--gray-50)}.steps-container{display:flex;flex-direction:column;gap:12px;max-height:300px;overflow-y:auto}.step-item{display:flex;align-items:center;gap:16px;padding:8px 12px;background:white;border-radius:12px;font-family:monospace;font-size:0.8rem}.step-index{width:28px;height:28px;background:#10b981;color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.7rem;font-weight:600}.step-detail{flex:1}.algorithm-note{padding:16px 20px;background:#fef3c7}.note-header{display:flex;align-items:center;gap:8px;font-weight:600;color:#92400e;margin-bottom:8px}.note-content{font-size:0.75rem;color:#78350f;line-height:1.5}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.core-stats{gap:12px}.core-stat{padding:12px 20px}.reverse-options{flex-direction:column}.action-buttons{flex-direction:column}.btn-outline,.reverse-btn{width:100%;text-align:center}.array-item{padding:8px 14px;font-size:0.8rem}}@media (max-width:480px){.array-items{justify-content:center}}