:root{--primary:#0ea5e9;--primary-dark:#0284c7;--primary-light:#e0f2fe;--dark:#0f172a;--dark-2:#1e293b;--text:#334155;--text-light:#64748b;--border:#e2e8f0;--bg:#ffffff;--bg-light:#f8fafc;--bg-alt:#f1f5f9;--success:#10b981;--success-light:#d1fae5;--danger:#ef4444;--warning:#f59e0b;--radius:12px;--radius-sm:8px;--radius-xs:6px;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow:0 1px 3px rgba(0,0,0,0.1),0 1px 2px rgba(0,0,0,0.06);--shadow-md:0 4px 6px rgba(0,0,0,0.07),0 2px 4px rgba(0,0,0,0.06);--shadow-lg:0 10px 25px rgba(0,0,0,0.1),0 4px 6px rgba(0,0,0,0.05);--transition:0.2s ease;--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}*,::after,::before{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--primary-dark)}img{max-width:100%;display:block}button,input,select,textarea{font-family:inherit;font-size:inherit}ol,ul{list-style:none}.container{max-width:1160px;margin:0 auto;padding:0 20px}.container-sm{max-width:860px;margin:0 auto;padding:0 20px}.navbar{position:sticky;top:0;z-index:100;background:var(--dark);border-bottom:1px solid rgba(255,255,255,.06);box-shadow:0 2px 8px rgba(0,0,0,.25)}.navbar .container{display:flex;align-items:center;height:60px;gap:8px}.nav-logo{display:flex;align-items:center;gap:8px;text-decoration:none;margin-right:16px;flex-shrink:0}.nav-logo svg{width:28px;height:28px}.nav-logo-text{font-size:1.05rem;font-weight:700;color:#fff;letter-spacing:-.02em}.nav-logo-text span{color:var(--primary)}.nav-links{display:flex;align-items:center;gap:2px;flex:1}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:4px;padding:6px 12px;color:rgba(255,255,255,.8);font-size:.875rem;font-weight:500;border-radius:var(--radius-xs);transition:all var(--transition);cursor:pointer;background:0 0;border:none;white-space:nowrap}.nav-link.active,.nav-link:hover{color:#fff;background:rgba(255,255,255,.08)}.nav-link svg{width:14px;height:14px;opacity:.7;transition:transform var(--transition)}.nav-item.open .nav-link svg{transform:rotate(180deg)}.dropdown-menu{display:none;position:absolute;top:calc(100% + 8px);left:0;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);min-width:240px;padding:8px;z-index:200}.nav-item.open .dropdown-menu{display:block}.nav-item.open .dropdown-menu.dropdown-menu-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px;min-width:520px}.dropdown-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius-sm);color:var(--text);font-size:.875rem;font-weight:500;transition:all var(--transition)}.dropdown-item:hover{background:var(--bg-light);color:var(--primary)}.dropdown-item-icon{width:28px;height:28px;background:var(--primary-light);border-radius:6px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:.8rem}.dropdown-item-text{font-size:.8rem;color:var(--text-light)}.dropdown-divider{height:1px;background:var(--border);margin:6px 0}.nav-hamburger{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;padding:12px 8px;min-width:44px;background:0 0;border:none;margin-left:auto}.nav-hamburger span{display:block;width:22px;height:2px;background:rgba(255,255,255,.8);border-radius:2px;transition:all var(--transition)}.mobile-menu{display:none;position:fixed;inset:60px 0 0 0;background:var(--dark);z-index:99;overflow-y:auto;padding:16px;transition:opacity .3s ease,transform .3s ease}.mobile-menu.open{display:block}.mobile-menu-section{margin-bottom:24px}.mobile-menu-label{font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.72);padding:0 8px;margin-bottom:8px}.mobile-menu-item{display:flex;align-items:center;gap:10px;padding:12px 16px;min-height:48px;color:rgba(255,255,255,.8);font-size:.95rem;border-radius:var(--radius-sm);transition:all var(--transition)}.mobile-menu-item:hover{color:#fff;background:rgba(255,255,255,.06)}.hero{background:linear-gradient(135deg,var(--dark) 0,var(--dark-2) 100%);padding:48px 0 40px;text-align:center}.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(14,165,233,.15);border:1px solid rgba(14,165,233,.3);color:var(--primary);font-size:.75rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;padding:4px 12px;border-radius:100px;margin-bottom:16px}.hero h1{font-size:clamp(1.75rem, 4vw, 2.5rem);font-weight:800;color:#fff;line-height:1.2;letter-spacing:-.03em;margin-bottom:12px}.hero h1 span{color:var(--primary)}.hero p{font-size:1rem;color:rgba(255,255,255,.65);max-width:540px;margin:0 auto;line-height:1.7}.ad-slot{background:var(--bg-alt);border:1px dashed var(--border);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--text-light);font-size:.75rem;overflow:hidden}.ad-slot-banner{height:90px;margin:16px 0}.ad-slot-rect{height:250px}.ad-slot-leaderboard{height:90px;margin:24px 0}.page-main{padding:32px 0 64px}.page-layout{display:grid;grid-template-columns:1fr 300px;gap:28px;align-items:start}.page-layout-full{max-width:900px;margin:0 auto}.sidebar{display:flex;flex-direction:column;gap:20px}.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}.card:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(14,165,233,.12);border-color:var(--primary)}.card-header{padding:18px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}.card-header h2{font-size:1rem;font-weight:700;color:var(--dark)}.card-header-icon{width:32px;height:32px;background:var(--primary-light);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0}.card-body{padding:24px}.card-footer{padding:14px 24px;background:var(--bg-light);border-top:1px solid var(--border);display:flex;align-items:center;gap:10px;flex-wrap:wrap}.form-row{display:grid;gap:16px;margin-bottom:16px}.form-row-2{grid-template-columns:1fr 1fr}.form-row-3{grid-template-columns:1fr 1fr 1fr}.form-row-4{grid-template-columns:repeat(4,1fr)}.form-group{display:flex;flex-direction:column;gap:6px}.form-label{font-size:.8rem;font-weight:600;color:var(--dark);display:flex;align-items:center;gap:4px}.form-label .info-icon{width:14px;height:14px;background:var(--text-light);color:#fff;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:.6rem;cursor:help;flex-shrink:0}.input,.select{height:42px;padding:0 12px;background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-sm);color:var(--dark);font-size:.9rem;transition:border-color var(--transition),box-shadow var(--transition);width:100%;appearance:none}.input:focus,.select:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 3px rgba(14,165,233,.15)}.btn:focus-visible{outline:3px solid var(--primary);outline-offset:2px}.input::placeholder{color:var(--text-light)}.input-group{display:flex}.input-group .input{border-radius:var(--radius-sm) 0 0 var(--radius-sm);border-right:none}.input-group-addon{display:flex;align-items:center;padding:0 12px;background:var(--bg-alt);border:1.5px solid var(--border);border-left:none;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:.8rem;color:var(--text-light);white-space:nowrap}.select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:32px;cursor:pointer}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:0 18px;height:40px;border-radius:var(--radius-sm);font-size:.875rem;font-weight:600;cursor:pointer;border:none;transition:all var(--transition);white-space:nowrap;text-decoration:none}.btn svg{width:15px;height:15px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);color:#fff}.btn-secondary{background:var(--bg);color:var(--text);border:1.5px solid var(--border)}.btn-secondary:hover{background:var(--bg-light);border-color:var(--text-light)}.btn-danger{background:#fef2f2;color:var(--danger);border:1.5px solid #fecaca}.btn-danger:hover{background:#fee2e2}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#059669;color:#fff}.btn-ghost{background:0 0;color:var(--text-light);padding:0 10px}.btn-ghost:hover{color:var(--text);background:var(--bg-light)}.btn-sm{height:32px;padding:0 12px;font-size:.8rem}.btn-lg{height:48px;padding:0 28px;font-size:1rem}.btn-icon{width:36px;height:36px;padding:0;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);cursor:pointer;border:1.5px solid var(--border);background:var(--bg);color:var(--text-light);transition:all var(--transition);flex-shrink:0}.btn-icon:hover{color:var(--danger);border-color:var(--danger);background:#fef2f2}.btn-icon svg{width:15px;height:15px}.unit-toggle{display:inline-flex;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-sm);padding:3px;gap:2px}.unit-toggle-btn{padding:4px 12px;border-radius:5px;font-size:.8rem;font-weight:600;color:var(--text-light);background:0 0;border:none;cursor:pointer;transition:all var(--transition)}.unit-toggle-btn.active{background:var(--bg);color:var(--dark);box-shadow:var(--shadow-sm)}.calc-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:16px}.calc-table{width:100%;border-collapse:collapse;min-width:600px}.calc-table th{background:var(--bg-light);padding:10px 12px;font-size:.75rem;font-weight:700;color:var(--text-light);text-transform:uppercase;letter-spacing:.04em;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap}.calc-table th.text-right{text-align:right}.calc-table td{padding:6px 8px;border-bottom:1px solid var(--border);vertical-align:middle}.calc-table tr:last-child td{border-bottom:none}.calc-table tr:hover td{background:var(--bg-light)}.calc-table .input{height:36px;font-size:.85rem;padding:0 8px}.calc-table .input-num{text-align:right;width:80px}.calc-table .input-desc{width:130px}.calc-table .select{height:36px;font-size:.85rem;padding:0 28px 0 8px;width:72px}.calc-table .row-num{font-size:.75rem;color:var(--text-light);font-weight:600;text-align:center;width:32px}.calc-table .cbm-value{text-align:right;font-weight:700;font-size:.9rem;color:var(--primary-dark);font-variant-numeric:tabular-nums}.calc-table .action-cell{text-align:center;width:40px}.table-add-row{padding:10px 16px;border-top:1px dashed var(--border);background:var(--bg-light)}.results-panel{background:linear-gradient(135deg,var(--dark) 0,var(--dark-2) 100%);border-radius:var(--radius);padding:24px;color:#fff;margin-top:16px}.results-panel-title{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,.75);margin-bottom:16px}.results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;margin-bottom:20px}.result-label{font-size:.75rem;color:rgba(255,255,255,.75);margin-bottom:4px}.result-value{font-size:1.75rem;font-weight:800;color:#fff;letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1}.result-value.large{font-size:2.5rem}.result-unit{font-size:.8rem;color:rgba(255,255,255,.75);font-weight:500;margin-top:2px}.result-actions{display:flex;gap:8px;flex-wrap:wrap;padding-top:16px;border-top:1px solid rgba(255,255,255,.1)}.result-actions .btn-secondary{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.15);color:rgba(255,255,255,.8)}.result-actions .btn-secondary:hover{background:rgba(255,255,255,.18);color:#fff}.info-box{background:var(--primary-light);border:1px solid rgba(14,165,233,.25);border-left:3px solid var(--primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:12px 16px;font-size:.85rem;color:var(--dark-2);line-height:1.6;margin:16px 0}.info-box strong{color:var(--primary-dark)}.warning-box{background:#fffbeb;border:1px solid #fde68a;border-left:3px solid var(--warning);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:12px 16px;font-size:.85rem;color:#78350f}.success-box{background:var(--success-light);border:1px solid #6ee7b7;border-left:3px solid var(--success);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:12px 16px;font-size:.85rem;color:#065f46}.related-tools{margin-top:40px}.section-title{font-size:1.1rem;font-weight:700;color:var(--dark);margin-bottom:16px;display:flex;align-items:center;gap:8px}.section-title::after{content:'';flex:1;height:1px;background:var(--border)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}.tool-card{display:flex;align-items:center;gap:12px;padding:14px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);text-decoration:none;transition:all var(--transition)}.tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-1px);color:var(--text)}.tool-card-icon{width:36px;height:36px;background:var(--primary-light);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0;transition:background var(--transition)}.tool-card:hover .tool-card-icon{background:var(--primary)}.tool-card-name{font-size:.8rem;font-weight:600;color:var(--dark);line-height:1.3}.tool-card-desc{font-size:.72rem;color:var(--text-light);margin-top:2px}.widget{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.widget-header{padding:12px 16px;background:var(--bg-light);border-bottom:1px solid var(--border);font-size:.8rem;font-weight:700;color:var(--dark);text-transform:uppercase;letter-spacing:.04em}.widget-body{padding:14px 16px}.widget-link{display:flex;align-items:center;gap:8px;padding:7px 0;font-size:.85rem;color:var(--text);border-bottom:1px solid var(--border);transition:color var(--transition)}.widget-link:last-child{border-bottom:none}.widget-link:hover{color:var(--primary)}.widget-link-icon{font-size:.9rem;width:20px;text-align:center}.article{max-width:780px;margin:0 auto}.article h2{font-size:1.4rem;font-weight:700;color:var(--dark);margin:32px 0 12px;letter-spacing:-.02em}.article h3{font-size:1.1rem;font-weight:700;color:var(--dark);margin:24px 0 10px}.article p{font-size:.95rem;line-height:1.8;color:var(--text);margin-bottom:14px}.article ol,.article ul{padding-left:20px;margin-bottom:16px}.article ul{list-style:disc}.article ol{list-style:decimal}.article li{font-size:.95rem;line-height:1.8;color:var(--text);margin-bottom:6px}.article table,.faq-answer table,.post-content table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}.article table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.9rem}.article table th{background:var(--bg-light);padding:10px 14px;text-align:left;font-weight:700;color:var(--dark);border:1px solid var(--border)}.article table td{padding:9px 14px;border:1px solid var(--border);color:var(--text)}.article table tr:nth-child(2n) td{background:var(--bg-light)}.formula-box{background:var(--dark);color:#e2e8f0;border-radius:var(--radius-sm);padding:16px 20px;font-family:'SF Mono','Fira Code',monospace;font-size:.9rem;margin:16px 0;line-height:1.6}.formula-box .formula-highlight{color:var(--primary);font-weight:700}.faq-list{display:flex;flex-direction:column;gap:8px;margin-top:16px}.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 16px;font-size:.9rem;font-weight:600;color:var(--dark);background:var(--bg);border:none;cursor:pointer;text-align:left;transition:background var(--transition);gap:12px}.faq-question:hover{background:var(--bg-light)}.faq-question svg{width:16px;height:16px;color:var(--text-light);flex-shrink:0;transition:transform var(--transition)}.faq-item.open .faq-question svg{transform:rotate(180deg)}.faq-answer{display:none;padding:0 16px 14px;font-size:.875rem;color:var(--text);line-height:1.7;border-top:1px solid var(--border);padding-top:12px}.faq-item.open .faq-answer{display:block}.footer{background:var(--dark);color:rgba(255,255,255,.8);padding:48px 0 28px;margin-top:64px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px;margin-bottom:40px}.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px;text-decoration:none}.footer-logo-text{font-size:1rem;font-weight:700;color:#fff}.footer-logo-text span{color:var(--primary)}.footer-tagline{font-size:.85rem;line-height:1.7;color:rgba(255,255,255,.72);margin-bottom:16px}.footer-col-title{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,.72);margin-bottom:14px}.footer-links{display:flex;flex-direction:column;gap:8px}.footer-link{font-size:.85rem;color:rgba(255,255,255,.78);transition:color var(--transition)}.footer-link:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;display:flex;align-items:center;justify-content:space-between;font-size:.8rem;flex-wrap:wrap;gap:8px}.text-center{text-align:center}.text-right{text-align:right}.text-primary{color:var(--primary)}.text-success{color:var(--success)}.text-danger{color:var(--danger)}.text-muted{color:var(--text-light)}.font-mono{font-family:'SF Mono','Fira Code',monospace}.font-bold{font-weight:700}.mt-0{margin-top:0}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mb-0{margin-bottom:0}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.hidden{display:none!important}.d-flex{display:flex}.align-center{align-items:center}.gap-8{gap:8px}.gap-12{gap:12px}.flex-1{flex:1}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:100px;font-size:.7rem;font-weight:700;letter-spacing:.02em}.badge-primary{background:var(--primary-light);color:var(--primary-dark)}.badge-success{background:var(--success-light);color:#065f46}.badge-warning{background:#fffbeb;color:#92400e}.dim-formula{display:flex;align-items:center;gap:6px;font-size:.85rem;color:var(--text-light);margin:8px 0;flex-wrap:wrap}.dim-formula .dim-val{font-weight:700;color:var(--dark);font-variant-numeric:tabular-nums}.dim-formula .dim-op{color:var(--text-light)}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:16px 0}.compare-card{border:2px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;transition:all var(--transition)}.compare-card.winner{border-color:var(--success);background:var(--success-light)}.compare-card.loser{opacity:.6}.compare-card-label{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-light);margin-bottom:8px}.compare-card.winner .compare-card-label{color:var(--success)}.compare-card-value{font-size:2rem;font-weight:800;color:var(--dark);font-variant-numeric:tabular-nums}.compare-card.winner .compare-card-value{color:var(--success)}.compare-card-sub{font-size:.8rem;color:var(--text-light);margin-top:4px}.winner-badge{display:inline-flex;align-items:center;gap:4px;background:var(--success);color:#fff;font-size:.7rem;font-weight:700;padding:3px 10px;border-radius:100px;margin-top:8px}.calc-tabs{display:flex;gap:4px;margin-bottom:-1px;flex-wrap:wrap}.calc-tab{padding:8px 18px;border:1.5px solid var(--border);border-bottom:none;border-radius:var(--radius-sm) var(--radius-sm) 0 0;background:var(--bg-light);color:var(--text-light);font-size:.85rem;font-weight:600;cursor:pointer;transition:all var(--transition);text-decoration:none;display:inline-flex;align-items:center;gap:6px}.calc-tab:hover{background:var(--bg);color:var(--dark)}.calc-tab.active{background:var(--bg);color:var(--primary);border-color:var(--border);border-bottom:2px solid var(--bg)}.calc-tab-link{background:var(--primary-light);color:var(--primary-dark);border-color:rgba(14,165,233,.3)}.calc-tab-link:hover{background:var(--primary);color:#fff}.tab-panel{display:none}.tab-panel.active{display:block}.fill-bar-inner{transition:width .4s ease;border-radius:100px}.fill-good{background:var(--success)}.fill-warning{background:var(--warning)}.fill-danger{background:var(--danger)}.conv-panel{margin-top:16px}.conv-results{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:12px}.conv-result-item{background:var(--bg-light);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;display:flex;flex-direction:column;gap:2px}.conv-result-val{font-size:1.05rem;font-weight:700;color:var(--dark);font-variant-numeric:tabular-nums;word-break:break-all}.conv-result-unit{font-size:.72rem;color:var(--text-light);font-weight:600;text-transform:uppercase;letter-spacing:.04em}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.article a,.faq-answer a,.info-box a,.post-content a{text-decoration:underline;text-underline-offset:2px;color:var(--primary-dark)}.article a:hover,.faq-answer a:hover,.info-box a:hover,.post-content a:hover{color:var(--primary)}@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .25s ease}@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}.calculating{animation:pulse 1s infinite}.mobile-bottom-bar{display:none}@media (max-width:1024px){.page-layout{grid-template-columns:1fr}.sidebar{display:grid;grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}@media (max-width:768px){.dropdown-menu,.dropdown-menu-grid{min-width:280px!important;grid-template-columns:1fr!important;left:0!important;right:0!important}}@media (max-width:768px){.nav-links{display:none}.nav-hamburger{display:flex}.hero{padding:32px 0 28px}.form-row-2,.form-row-3,.form-row-4{grid-template-columns:1fr}.tools-grid{grid-template-columns:1fr 1fr}.compare-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;text-align:center}.sidebar{grid-template-columns:1fr}.footer-link{font-size:.9rem}}@media (max-width:900px){.page-layout{grid-template-columns:1fr}}@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:24px}}@media (max-width:600px){.footer-grid{grid-template-columns:1fr;gap:20px}.footer-link{font-size:.9rem;min-height:36px;display:flex;align-items:center}}@media (max-width:960px){.results-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:480px){.container,.container-sm{padding:0 14px}.card-body{padding:16px}.results-grid{grid-template-columns:1fr}.tools-grid{grid-template-columns:1fr}.unit-toggle-btn{padding:6px 12px;font-size:.82rem;min-height:36px}}@media (max-width:640px){.input,.select,input[type=number],input[type=text],select{font-size:16px!important;height:48px}.btn-sm{height:42px;padding:0 16px;font-size:.875rem}.btn-icon{width:44px;height:44px}.form-label{font-size:.85rem;font-weight:600}.result-value{font-size:1.4rem}.result-value.large{font-size:1.75rem}.article table td,.article table th{font-size:.78rem;padding:6px 8px}.hero{padding:32px 0 24px}.hero h1{font-size:clamp(1.5rem, 5vw, 2rem);line-height:1.2}.hero p{font-size:.95rem;line-height:1.6}.hero-badge{font-size:.72rem;padding:4px 12px}.mobile-bottom-bar{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:100;background:var(--dark);border-top:1px solid rgba(255,255,255,.08);padding:8px 12px;padding-bottom:calc(8px + env(safe-area-inset-bottom,0px));gap:4px;box-shadow:0 -4px 16px rgba(0,0,0,.2)}.mobile-bottom-bar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.65rem;font-weight:600;color:rgba(255,255,255,.55);text-decoration:none;padding:4px 2px;border-radius:8px;transition:color .2s ease,background .2s ease;min-height:44px;justify-content:center}.mobile-bottom-bar a.active,.mobile-bottom-bar a:hover{color:var(--primary);background:rgba(14,165,233,.1)}.mobile-bottom-bar a svg{width:20px;height:20px}body{padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}}