.calculator-tabs{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap;background:var(--bg-secondary);padding:12px;border-radius:var(--radius-md);border:1px solid var(--border-color)}.tab-button{padding:8px 16px;background:transparent;border:1px solid transparent;color:var(--text-secondary);font-size:13px;font-weight:500;cursor:pointer;border-radius:var(--radius-sm);transition:all .2s ease}.tab-button:hover{color:var(--text-primary);background:#6c3ce11a}.tab-button.active{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary)}.calculator-section{display:none;padding:24px;background:var(--bg-tool);border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:24px}.calculator-section.active{display:block;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.calculator-section h2{margin-top:0;margin-bottom:20px;font-size:18px;color:var(--text-primary)}.calculator-inputs{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}.input-group{display:flex;flex-direction:column}.input-group label{font-size:12px;font-weight:600;color:var(--text-secondary);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}.input-group input,.input-group select{padding:10px 12px;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:14px;font-family:inherit;transition:border-color .2s ease}.input-group input:focus,.input-group select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 2px #6c3ce133}.input-group input::-moz-placeholder{color:var(--text-muted)}.input-group input::placeholder{color:var(--text-muted)}.tip-quick-buttons{display:flex;gap:8px;margin-bottom:8px;flex-wrap:wrap}.quick-tip-btn{padding:6px 12px;background:#6c3ce126;border:1px solid var(--accent-primary);color:var(--accent-primary);border-radius:var(--radius-sm);font-size:12px;font-weight:600;cursor:pointer;transition:all .2s ease}.quick-tip-btn:hover{background:var(--accent-primary);color:#fff}.result-section{padding:20px;background:#6c3ce10d;border:1px solid rgba(108,60,225,.2);border-radius:var(--radius-md)}.result-display{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;font-size:24px}.result-label{color:var(--text-secondary);font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.result-value{font-size:32px;font-weight:700;color:var(--accent-primary)}.result-unit{color:var(--text-secondary);font-size:18px;font-weight:500}.change-type{font-size:13px;padding:4px 10px;border-radius:var(--radius-sm);font-weight:600}.change-type.increase{background:#10b98133;color:var(--accent-success)}.change-type.decrease{background:#ef444433;color:var(--accent-error)}.result-breakdown{margin-bottom:16px}.breakdown-item{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.05)}.breakdown-item:last-child{border-bottom:none}.breakdown-item.highlight{background:#6c3ce11a;padding:12px;border-radius:var(--radius-sm);border-bottom:none;margin-top:8px}.breakdown-label{color:var(--text-secondary);font-size:13px;font-weight:600}.breakdown-value{color:var(--text-primary);font-size:18px;font-weight:700}.breakdown-value.savings{color:var(--accent-success)}.progress-bar{width:100%;height:8px;background:#ffffff0d;border-radius:4px;overflow:hidden;margin:16px 0}.progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-primary),var(--accent-secondary));width:0%;transition:width .3s ease;border-radius:4px}.copy-btn{width:100%;padding:10px 16px;margin-top:12px;background:var(--accent-primary);border:none;color:#fff;font-size:13px;font-weight:600;cursor:pointer;border-radius:var(--radius-sm);transition:all .2s ease}.copy-btn:hover{background:#7d51f0;transform:translateY(-1px)}.copy-feedback{display:inline-block;margin-top:8px;font-size:12px;color:var(--accent-success);font-weight:600;min-height:16px}.history-section{margin-top:40px;padding:20px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md)}.history-section h3{margin-top:0;margin-bottom:16px;color:var(--text-primary);font-size:16px}.history-list{max-height:300px;overflow-y:auto;margin-bottom:12px}.history-item{padding:10px;background:var(--bg-tool);border:1px solid var(--border-color);border-radius:var(--radius-sm);margin-bottom:8px;font-size:13px;color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.history-item:hover{background:#6c3ce11a;border-color:var(--accent-primary);color:var(--text-primary)}.history-empty{color:var(--text-muted);font-size:13px;text-align:center;padding:20px 10px}.clear-history-btn{width:100%;padding:8px 12px;background:#ef44441a;border:1px solid var(--accent-error);color:var(--accent-error);font-size:12px;font-weight:600;cursor:pointer;border-radius:var(--radius-sm);transition:all .2s ease}.clear-history-btn:hover{background:var(--accent-error);color:#fff}.seo-content{margin-top:48px;padding-top:32px;border-top:1px solid var(--border-color)}.seo-content h2{margin-top:32px;margin-bottom:16px;font-size:20px;color:var(--text-primary)}.seo-content p,.seo-content li{color:var(--text-secondary);line-height:1.6;margin-bottom:12px}.seo-content ul{padding-left:20px;margin-bottom:24px}.seo-content li{margin-bottom:8px}.seo-content strong{color:var(--text-primary)}.faq-section{margin-top:24px}.faq-section details{margin-bottom:12px;padding:16px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer}.faq-section details summary{font-weight:600;color:var(--text-primary);-webkit-user-select:none;-moz-user-select:none;user-select:none;transition:color .2s ease}.faq-section details summary:hover{color:var(--accent-primary)}.faq-section details p{margin-top:12px;margin-bottom:0;color:var(--text-secondary)}@media(max-width:768px){.calculator-tabs{gap:6px;padding:10px}.tab-button{padding:6px 12px;font-size:12px}.calculator-section{padding:16px}.calculator-inputs{grid-template-columns:1fr;gap:12px}.result-value{font-size:28px}.result-display{font-size:18px}.tip-quick-buttons{gap:6px}.quick-tip-btn{padding:4px 10px;font-size:11px}}