@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--primary-color: #3b82f6;--primary-hover: #2563eb;--secondary-color: #64748b;--accent-color: #0ea5e9;--background-bg: #f8fafc;--surface-bg: #ffffff;--text-primary: #1e293b;--text-secondary: #475569;--border-color: #e2e8f0;--success-color: #10b981;--warning-color: #f59e0b;--error-color: #ef4444;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--container-max-width: 1400px;--header-height: 60px;--sidebar-width: 250px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:#f1f5f9;color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:4px;height:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#94a3b8;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#64748b}html{scrollbar-width:thin;scrollbar-color:#94a3b8 transparent}.app-container{display:flex;flex-direction:column;min-height:100vh}.header{height:var(--header-height);background-color:#fffc;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(226,232,240,.7);box-shadow:0 4px 6px -1px #0000000d;position:sticky;top:0;z-index:1000}.header-inner{width:100%;max-width:100%;margin:0;height:100%;padding:0 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:2rem}.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:5px;z-index:1100}.mobile-menu-btn span{width:25px;height:3px;background-color:var(--text-primary);border-radius:3px;transition:all .3s ease}.mobile-menu-btn.active span:nth-child(1){transform:rotate(45deg) translate(5px,6px)}.mobile-menu-btn.active span:nth-child(2){opacity:0}.mobile-menu-btn.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-6px)}.logo{font-size:1.25rem;font-weight:700;color:var(--primary-color);text-decoration:none;white-space:nowrap}.logo span{color:var(--text-primary)}.main-layout{display:flex;flex:1;max-width:var(--container-max-width);margin:0 auto;width:100%;padding:2rem;gap:2rem}.home-hero{text-align:center;padding:5rem 1rem 6rem;background:radial-gradient(circle at top right,#eff6ff,transparent),radial-gradient(circle at bottom left,#f5f3ff,transparent),#fff;border-radius:32px;margin-bottom:-4rem;position:relative;overflow:hidden;border:1px solid rgba(226,232,240,.8);box-shadow:0 10px 50px -12px #0000000d}.home-hero h1{font-size:3.5rem;font-weight:800;line-height:1.2;margin-bottom:1.5rem;letter-spacing:-.02em;background:linear-gradient(135deg,#1e293b,#3b82f6);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.home-hero p{font-size:1.25rem;color:#64748b;max-width:650px;margin:0 auto 3rem;line-height:1.6}.search-container{max-width:640px;margin:0 auto;position:relative;z-index:10}.search-input{width:100%;padding:1.4rem 1.5rem 1.4rem 3.8rem;border:1px solid #e2e8f0;border-radius:20px;font-size:1.15rem;background:#fff;box-shadow:0 10px 25px -5px #0000000d;transition:all .3s ease;box-sizing:border-box;color:#1e293b}.search-input:focus{outline:none;border-color:#3b82f6;box-shadow:0 20px 25px -5px #3b82f61a}.search-icon-bg{position:absolute;left:1.4rem;display:flex;align-items:center;justify-content:center;color:#3b82f6;pointer-events:none}.category-nav-container{margin:0 auto 3rem;padding:0 1rem;max-width:1200px;position:relative;z-index:20}.category-tabs{display:flex;gap:.75rem;overflow-x:auto;padding:1rem .5rem;scrollbar-width:none;-ms-overflow-style:none;justify-content:center}.category-tabs::-webkit-scrollbar{display:none}.category-tab{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:120px;padding:1rem;background:#fff;border:1px solid var(--border-color);border-radius:16px;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);gap:.5rem;text-decoration:none;color:var(--text-primary);box-shadow:var(--shadow-sm)}.category-tab .tab-icon{width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:#f1f5f9;border-radius:12px;color:var(--text-secondary);transition:all .3s ease}.category-tab span{font-size:.85rem;font-weight:600;white-space:nowrap}.category-tab:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--primary-color)}.category-tab.active{background:#1e293b;border-color:#1e293b;color:#fff;box-shadow:var(--shadow-lg)}.category-tab.active .tab-icon{background:#ffffff1a;color:#fff}.category-tab.active span{color:#fff}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-top:1rem;animation:fadeIn .4s ease-out}.tool-card{background:#fff;border:1px solid var(--border-color);border-radius:20px;padding:1.5rem;display:flex;flex-direction:column;gap:1.25rem;text-decoration:none;color:var(--text-primary);transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}.tool-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#3b82f64d}.tool-card:hover .tool-icon-wrapper{background:var(--primary-color);color:#fff;transform:scale(1.1)}.tool-icon-wrapper{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:#eff6ff;border-radius:14px;color:var(--primary-color);transition:all .3s ease}.tool-info h3{font-size:1rem;font-weight:700;margin-bottom:.5rem;line-height:1.4;color:var(--text-primary)}.tool-action{font-size:.85rem;font-weight:600;color:var(--primary-color);display:inline-block}.category-section{margin-bottom:3rem}.category-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}.category-header h2{font-size:1.5rem;color:var(--text-primary)}@media(max-width:768px){.home-hero h1{font-size:2rem}.category-tabs{justify-content:flex-start}.category-tab{min-width:100px;padding:.75rem}.tool-card{padding:1.25rem}}.header-nav{flex:1;height:100%;min-width:0}.header-nav-list{display:flex;list-style:none;gap:.25rem;height:100%;align-items:center;justify-content:flex-end;overflow-x:auto;overflow-y:visible;scrollbar-width:thin;padding:0 .5rem}.header-nav-list::-webkit-scrollbar{height:2px}.header-nav-list::-webkit-scrollbar-track{background:transparent}.header-nav-list::-webkit-scrollbar-thumb{background:#3b82f633;border-radius:10px}.header-nav-list:hover::-webkit-scrollbar-thumb{background:#3b82f680}.nav-item{position:relative;height:100%;display:flex;align-items:center}.nav-link{display:flex;align-items:center;gap:.25rem;text-decoration:none;color:var(--text-primary);font-weight:600;font-size:.82rem;transition:all .2s cubic-bezier(.4,0,.2,1);height:70%;padding:0 .6rem;border-radius:6px;cursor:pointer;white-space:nowrap}.nav-link:hover{color:var(--primary-color);background:#3b82f614}.nav-arrow{font-size:.65rem;color:var(--text-secondary);transition:transform .3s ease;margin-top:1px}.nav-item:hover .nav-arrow{transform:rotate(180deg);color:var(--primary-color)}.header-nav-list{overflow:visible!important}@media(max-width:1200px){.header-nav-list{overflow-x:auto!important}}.nav-dropdown{position:absolute;top:100%;left:0;width:250px;background:var(--surface-bg);border:1px solid var(--border-color);border-top:none;border-radius:0 0 8px 8px;box-shadow:var(--shadow-lg);padding:.5rem 0;z-index:100;max-height:500px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#94a3b8 transparent;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s cubic-bezier(.4,0,.2,1)}.nav-dropdown::-webkit-scrollbar{width:4px;height:4px}.nav-dropdown::-webkit-scrollbar-track{background:transparent}.nav-dropdown::-webkit-scrollbar-thumb{background:#94a3b8;border-radius:4px}.nav-dropdown::-webkit-scrollbar-thumb:hover{background:#64748b}.nav-item:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.nav-item:nth-last-child(-n+3) .nav-dropdown{left:auto;right:0}.dropdown-link{display:block;padding:.6rem 1.25rem;text-decoration:none;color:var(--text-secondary);font-size:.85rem;transition:all .2s}.dropdown-link:hover{color:var(--primary-color);background-color:#f8fafc;padding-left:1.5rem}.content{flex:1;min-width:0}h1{font-size:1.75rem;font-weight:700;color:var(--primary-color);margin-bottom:.5rem}.intro-text,.intro-subtext{margin-bottom:1rem;color:var(--text-secondary);font-size:.95rem}.alert-box{background-color:#eff6ff;border-left:4px solid var(--primary-color);padding:.75rem;border-radius:4px;margin-bottom:1.5rem;color:#1e3a8a;display:flex;align-items:center;gap:.5rem}.alert-icon{font-size:1.25rem}.calc-card{background:var(--surface-bg);border-radius:12px;box-shadow:0 1px 3px #0000001a,0 1px 2px -1px #0000001a;border:1px solid var(--border-color);padding:2rem;margin-bottom:3rem}.card-header{background-color:#f8fafc;padding:1rem 2rem;margin:-2rem -2rem 2rem;border-radius:12px 12px 0 0;font-weight:600;font-size:1.1rem;color:var(--text-primary);border-bottom:1px solid var(--border-color)}.required-note{font-size:.85rem;color:var(--error-color);margin-bottom:2rem;display:block;font-weight:500;opacity:.9}.form-group{margin-bottom:1.5rem;display:grid;grid-template-columns:150px 1fr;align-items:center;gap:1rem}.form-group label{font-weight:600;color:var(--text-primary)}.required-star{color:var(--error-color)}.input-wrapper{display:flex;align-items:center;gap:.5rem}.input-field{padding:.6rem 1rem;border:1px solid #cbd5e1;border-radius:6px;font-size:1rem;width:100%;max-width:320px;background-color:#fff}.input-field:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f61a}.radio-group{display:flex;gap:2rem}.radio-label{display:flex;align-items:center;gap:.6rem;cursor:pointer;font-weight:400!important;color:var(--text-primary)}.btn-group{display:flex;gap:1rem;margin-top:2rem;padding-left:calc(150px + 1rem)}.btn{padding:.75rem 2rem;border-radius:6px;font-weight:600;cursor:pointer;font-size:1rem;border:none;width:auto}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:#fff;border:1px solid #cbd5e1;color:var(--text-secondary)}.btn-secondary:hover{background-color:#f1f5f9;color:var(--text-primary)}.related-calcs-outer{margin:3rem 0}.related-calcs{margin-top:2rem!important;padding:1.25rem!important;background:#f8fafc!important;border-radius:8px!important;border:1px solid #e2e8f0!important}.related-calcs h4{margin-bottom:1rem!important;color:#1e293b!important;border-bottom:2px solid #2563eb!important;display:inline-block!important;font-weight:600!important;font-size:1rem!important;padding-bottom:.25rem!important}.related-calcs ul{list-style:none!important;padding:0!important;display:grid!important;grid-template-columns:repeat(2,1fr)!important;gap:.75rem!important;margin-top:.5rem!important}.related-calcs li{margin:0!important;list-style:none!important}.related-calcs a{color:#2563eb!important;text-decoration:none!important;font-weight:500!important;display:block!important;border-radius:4px!important;position:relative!important;padding:.5rem .5rem .5rem 1.5rem!important;font-size:.9rem!important}.related-calcs a:before{content:"➔"!important;position:absolute!important;left:.5rem!important;color:#2563eb!important;font-weight:700!important;font-size:.9rem!important}.related-calcs a:hover{background-color:#eff6ff!important}.qa-section h2,.qa-section h3{margin-top:2rem;margin-bottom:1rem;color:var(--text-primary)}.qa-section p{margin-bottom:1rem;color:var(--text-secondary)}.mobile-sidebar{display:flex;position:fixed;top:0;left:0;width:300px;height:100vh;background:var(--surface-bg);z-index:10001;transform:translate(-100%);transition:transform .4s cubic-bezier(.16,1,.3,1);box-shadow:5px 0 25px #00000026;flex-direction:column}@media(max-width:1024px){.header-nav{display:none}.mobile-menu-btn{display:flex}}.mobile-sidebar.active{transform:translate(0)}.mobile-sidebar-header{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;border-bottom:1px solid var(--border-color);background-color:#fffffff2}.mobile-menu-close{background:none;border:none;font-size:2rem;line-height:1;color:var(--text-secondary);cursor:pointer;transition:color .2s}.mobile-menu-close:hover{color:var(--error-color)}.mobile-sidebar-content{flex:1;overflow-y:auto;padding:1.5rem;scrollbar-width:thin;scrollbar-color:#94a3b8 transparent}.mobile-sidebar-content::-webkit-scrollbar{width:4px;height:4px}.mobile-sidebar-content::-webkit-scrollbar-track{background:transparent}.mobile-sidebar-content::-webkit-scrollbar-thumb{background:#94a3b8;border-radius:4px}.mobile-sidebar-content::-webkit-scrollbar-thumb:hover{background:#64748b}.mobile-nav-list{list-style:none;display:flex;flex-direction:column;gap:.5rem}.mobile-nav-item{border-bottom:1px solid transparent}.mobile-nav-link{display:flex;justify-content:space-between;align-items:center;padding:.85rem 1rem;text-decoration:none;font-weight:600;color:var(--text-primary);border-radius:8px;transition:all .2s ease;background-color:transparent}.mobile-nav-link:hover{background-color:#f1f5f9;color:var(--primary-color)}.mobile-nav-link.active{background-color:#3b82f61a;color:var(--primary-color)}.mobile-nav-arrow{transition:transform .3s ease;font-size:.8rem;opacity:.6}.mobile-nav-item.open .mobile-nav-arrow{transform:rotate(180deg);opacity:1}.mobile-submenu{list-style:none;max-height:0;overflow:hidden;transition:max-height .35s cubic-bezier(0,1,0,1);padding-left:.5rem;margin-top:0;opacity:.5}.mobile-nav-item.open .mobile-submenu{max-height:500px;opacity:1;margin-top:.25rem;margin-bottom:.5rem;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#94a3b8 transparent}.mobile-submenu::-webkit-scrollbar{width:4px;height:4px}.mobile-submenu::-webkit-scrollbar-track{background:transparent}.mobile-submenu::-webkit-scrollbar-thumb{background:#94a3b8;border-radius:4px}.mobile-submenu::-webkit-scrollbar-thumb:hover{background:#64748b}.mobile-sub-link{display:block;padding:.6rem 1rem;text-decoration:none;font-size:.95rem;color:var(--text-secondary);border-left:2px solid transparent;transition:all .2s;margin-left:.5rem}.mobile-sub-link:hover{color:var(--primary-color);border-left-color:var(--border-color);background:linear-gradient(90deg,#f8fafc,transparent)}.mobile-sidebar-footer{padding:1rem;text-align:center;font-size:.8rem;color:var(--text-secondary);border-top:1px solid var(--border-color);background-color:#f8fafc}.mobile-menu-overlay{position:fixed;top:0;left:0;width:100%;height:100vh;background-color:#0f172a66;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:10000;opacity:0;visibility:hidden;transition:all .3s ease}.mobile-menu-overlay.active{opacity:1;visibility:visible}.footer{margin-top:auto;background-color:var(--surface-bg);border-top:1px solid var(--border-color);color:var(--text-secondary)}.footer-container{max-width:var(--container-max-width);margin:0 auto;padding:2rem 1rem}.footer-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2rem;padding-bottom:2rem;border-bottom:1px solid var(--border-color);margin-bottom:1.5rem}.footer-brand{flex:1;min-width:250px}.footer-logo{font-size:1.5rem;font-weight:700;color:var(--primary-color);margin-bottom:.5rem}.footer-logo span{color:var(--text-primary)}.footer-tagline{font-size:1rem;color:var(--text-secondary);margin:0}.footer-links{display:flex;flex-wrap:wrap;gap:2rem}.footer-column{flex:1;min-width:180px}.footer-column h4{font-size:1rem;font-weight:600;color:var(--text-primary);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.footer-column ul{list-style:none;padding:0;margin:0}.footer-column li{margin-bottom:.5rem}.footer-column a{color:var(--text-secondary);text-decoration:none;font-size:.9rem;transition:color .2s}.footer-column a:hover{color:var(--primary-color)}.footer-bottom{text-align:center;padding-top:1rem}.footer-copyright{margin:0;font-size:.9em;color:var(--text-secondary)}@media(max-width:992px){.footer-top{flex-direction:column;gap:1.5rem}.footer-brand,.footer-links{min-width:100%}.footer-links{flex-direction:column;gap:1.5rem}}@media(max-width:768px){.main-layout{flex-direction:column;padding:1rem}.btn-group{flex-direction:column;padding-left:0}.btn{width:100%}.form-group{grid-template-columns:1fr;gap:.5rem}}.home-hero{text-align:center;margin-bottom:3rem;padding:3rem 1.5rem;background:linear-gradient(135deg,var(--surface-bg) 0%,#f1f5f9 100%);border-radius:16px;border:1px solid var(--border-color);box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.home-hero:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color),var(--accent-color))}.home-hero h1{font-size:2.2rem;margin-bottom:1rem;color:var(--text-primary);letter-spacing:-.5px}.home-hero p{color:var(--text-secondary);font-size:1.1rem;max-width:600px;margin:0 auto 2rem}.search-container{max-width:640px;margin:0 auto 2rem;position:relative;z-index:10}.search-input-wrapper{position:relative;display:flex;align-items:center}.search-input{width:100%;padding:1.2rem 1.5rem 1.2rem 3.8rem;border:1px solid var(--border-color);border-radius:12px;font-size:1rem;background:#fff;box-shadow:0 4px 6px -1px #0000000d;transition:all .3s ease;box-sizing:border-box;color:var(--text-primary)}.search-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f633}.calculator-display{background:#1e293b;color:#fff;padding:1.5rem;border-radius:8px;margin-bottom:1.5rem;font-size:1.5rem;text-align:right;min-height:80px;display:flex;align-items:center;justify-content:flex-end;font-family:Courier New,monospace;box-shadow:inset 0 2px 4px #00000040}.calculator-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:.75rem}.calc-btn{padding:1rem;border:none;border-radius:8px;font-size:1.2rem;font-weight:600;cursor:pointer;transition:all .2s}.calc-btn.operator{background:#f1f5f9;color:#3b82f6}.calc-btn.operator:hover{background:#e2e8f0}.calc-btn.number{background:#f8fafc;color:#1e293b}.calc-btn.number:hover{background:#e2e8f0}.calc-btn.equals{background:#3b82f6;color:#fff;grid-column:span 2}.calc-btn.equals:hover{background:#2563eb}.calc-btn.clear{background:#ef4444;color:#fff}.calc-btn.clear:hover{background:#dc2626}.categories-wrapper{display:flex;flex-direction:column;gap:3rem}.category-section{animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.category-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem;padding-bottom:.5rem;border-bottom:2px solid var(--border-color)}.category-header h2{font-size:1.5rem;color:var(--text-primary);margin:0}.cat-icon-svg{width:32px;height:32px;color:var(--primary-color)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.tool-card{display:flex;flex-direction:column;background:var(--surface-bg);border:1px solid var(--border-color);border-radius:12px;padding:1.5rem;text-decoration:none;transition:all .2s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;height:100%}.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.tool-icon-wrapper{width:48px;height:48px;background-color:#eff6ff;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--primary-color)}.tool-card svg{width:24px;height:24px}.tool-info h3{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem;line-height:1.4}.tool-action{font-size:.9rem;font-weight:600;color:var(--primary-color);margin-top:auto;display:flex;align-items:center;gap:.25rem;opacity:.8;transition:opacity .2s}.tool-card:hover .tool-action{opacity:1}.tool-icon-green{color:var(--success-color);background-color:#ecfdf5}.tool-icon-orange{color:var(--warning-color);background-color:#fffbeb}.tool-icon-blue{color:var(--primary-color);background-color:#eff6ff}