.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}.input-section{background:linear-gradient(135deg, #f8fafc, #fff);border-radius:32px;padding:32px;margin-bottom:32px;border:1px solid var(--gray-200)}.input-cards{display:grid;grid-template-columns:repeat(2, 1fr);gap:24px;margin-bottom:24px}.input-card{background:white;border-radius:24px;padding:20px;border:1px solid var(--gray-200);transition:all 0.3s}.input-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.05)}.card-header{display:flex;align-items:center;gap:8px;margin-bottom:16px;font-weight:600;color:var(--gray-700)}.card-header i{font-size:1.2rem;color:#10b981}.number-input{width:100%;padding:16px;border:2px solid var(--gray-200);border-radius:16px;font-size:1.2rem;font-weight:500;text-align:center;transition:all 0.3s}.number-input:focus{outline:none;border-color:#10b981;box-shadow:0 0 0 3px rgba(16,185,129,0.1)}.calculate-btn{width:100%;padding:16px;font-size:1.1rem;background:linear-gradient(135deg, #10b981, #059669);border-radius:60px}.result-area{margin-bottom:24px}.result-cards{display:grid;grid-template-columns:repeat(3, 1fr);gap:24px}.result-card{background:linear-gradient(135deg, #fff, #f8fafc);border-radius:24px;padding:24px;display:flex;align-items:center;gap:20px;border:1px solid var(--gray-200);transition:all 0.3s}.result-card:hover{transform:translateY(-4px);box-shadow:0 12px 25px rgba(0,0,0,0.08)}.result-icon{width:56px;height:56px;background:linear-gradient(135deg, #d1fae5, #a7f3d0);border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#10b981}.result-info{flex:1}.result-label{display:block;font-size:0.7rem;color:var(--gray-500);margin-bottom:4px}.result-value{display:block;font-size:1.8rem;font-weight:700;color:var(--gray-800)}.steps-area{background:var(--gray-50);border-radius:24px;padding:24px;margin-bottom:24px;animation:fadeIn 0.3s ease}.steps-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--gray-200);font-weight:600}.steps-copy-btn{background:transparent;border:1px solid var(--gray-300);padding:6px 16px;border-radius:30px;font-size:0.7rem;cursor:pointer;transition:all 0.2s}.steps-copy-btn:hover{background:#10b981;border-color:#10b981;color:white}.steps-content{font-family:monospace;font-size:0.9rem;line-height:1.8;color:var(--gray-700)}.step-item{display:flex;gap:12px;margin-bottom:12px;padding:8px;background:white;border-radius:12px}.step-number{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;flex-shrink:0}.step-text{flex:1}.visual-area{background:linear-gradient(135deg, #f0fdf4, #ecfdf5);border-radius:24px;padding:24px;margin-bottom:24px;animation:fadeIn 0.3s ease}.visual-header{display:flex;align-items:center;gap:8px;margin-bottom:20px;font-weight:600;color:#065f46}.visual-content{text-align:center}.division-visual{display:flex;justify-content:center;flex-wrap:wrap;gap:4px;margin-bottom:20px}.visual-block{width:40px;height:40px;background:linear-gradient(135deg, #10b981, #059669);border-radius:8px;display:inline-flex;align-items:center;justify-content:center;color:white;font-weight:600;margin:2px;transition:all 0.2s;animation:fadeInUp 0.3s ease}.visual-block.remainder{background:linear-gradient(135deg, #f59e0b, #d97706)}.formula-display{font-size:1.2rem;font-family:monospace;padding:16px;background:white;border-radius:16px;box-shadow:0 2px 8px rgba(0,0,0,0.05)}.formula-display span{color:#10b981;font-weight:600}.quick-examples{margin-bottom:24px}.divider{display:flex;align-items:center;gap:12px;margin-bottom:16px}.divider span{font-size:0.85rem;font-weight:500;color:var(--gray-600)}.divider::after{content:'';flex:1;height:1px;background:var(--gray-200)}.example-buttons{display:flex;flex-wrap:wrap;gap:12px}.example-btn{background:var(--gray-100);border:1px solid var(--gray-200);padding:10px 20px;border-radius:40px;cursor:pointer;transition:all 0.2s;font-size:0.85rem;font-family:monospace}.example-btn:hover{background:#10b981;border-color:#10b981;color:white}.knowledge-section{background:var(--gray-50);border-radius:24px;padding:24px}.knowledge-header{display:flex;align-items:center;gap:8px;margin-bottom:20px;font-weight:600;color:var(--gray-700)}.knowledge-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.knowledge-card{background:white;border-radius:20px;padding:20px;text-align:center;transition:all 0.3s}.knowledge-card:hover{transform:translateY(-4px);box-shadow:0 10px 25px rgba(0,0,0,0.08)}.knowledge-card i{font-size:1.5rem;color:#10b981;margin-bottom:12px}.knowledge-card h4{font-size:0.9rem;margin-bottom:8px}.knowledge-card p{font-size:0.7rem;color:var(--gray-500);line-height:1.5}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{from{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}@media (max-width:900px){.input-cards{grid-template-columns:1fr}.result-cards{grid-template-columns:1fr}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:480px){.knowledge-grid{grid-template-columns:1fr}.visual-block{width:30px;height:30px;font-size:0.7rem}.formula-display{font-size:0.9rem}}