@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');:root{--bg-primary:#f8fafc;--bg-card:#ffffff;--text-primary:#0f172a;--text-secondary:#475569;--accent-blue:#2563eb;--accent-blue-hover:#1d4ed8;--accent-blue-light:#eff6ff;--accent-primary:#3e6352;--accent-primary-hover:#2f4d3f;--accent-primary-light:#f0f5f2;--accent-primary-border:rgba(62,99,82,0.2);--accent-primary-gradient-end:#d2dfd8;--border-color:#e2e8f0;--border-color-focus:#3e6352;--success-green:#10b981;--success-green-light:#ecfdf5;--error-red:#ef4444;--error-red-light:#fef2f2;--accent-orange:#f59e0b;--accent-orange-hover:#d97706;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.08),0 2px 4px -1px rgba(0,0,0,.04);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.08),0 4px 6px -2px rgba(0,0,0,.04);--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--font-sans:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}header{background-color:var(--bg-card);border-bottom:1px solid var(--border-color);position:relative;z-index:200;box-shadow:var(--shadow-sm)}.nav-container{max-width:1200px;margin:0 auto;padding:0.75rem 1rem;display:flex;justify-content:space-between;align-items:center;gap:0.5rem}.logo{text-decoration:none;display:flex;align-items:center;flex-shrink:0}.site-logo{display:block;width:auto;height:52px;max-width:245px;object-fit:contain}.nav-toggle{display:flex;flex-direction:column;justify-content:space-between;width:26px;height:20px;cursor:pointer;background:none;border:none;padding:0;flex-shrink:0}.nav-toggle span{display:block;height:2.5px;width:100%;background-color:var(--text-primary);border-radius:2px;transition:all 0.25s ease}.nav-toggle.open span:nth-child(1){transform:translateY(8.75px) rotate(45deg)}.nav-toggle.open span:nth-child(2){opacity:0;transform:scaleX(0)}.nav-toggle.open span:nth-child(3){transform:translateY(-8.75px) rotate(-45deg)}.nav-links{display:none;flex-direction:column;gap:0;position:absolute;top:100%;left:0;right:0;background-color:var(--bg-card);border-top:1px solid var(--border-color);border-bottom:2px solid var(--accent-primary);box-shadow:var(--shadow-md);z-index:199;padding:0.5rem 0}.nav-links.open{display:flex}.nav-links a{color:var(--text-primary);text-decoration:none;font-weight:500;font-size:1rem;padding:0.85rem 1.25rem;border-bottom:1px solid var(--border-color);transition:background-color 0.15s,color 0.15s;display:block}.nav-links a:last-child{border-bottom:none}.nav-links a:hover,.nav-links a:active{background-color:var(--accent-primary-light);color:var(--accent-primary)}@media (min-width:680px){.nav-toggle{display:none}.nav-links{display:flex !important;flex-direction:row;position:static;border:none;box-shadow:none;padding:0;gap:1.25rem;align-items:center;background:transparent}.nav-links a{padding:0;border:none;font-size:0.95rem;color:var(--text-secondary)}.nav-links a:hover{background:transparent;color:var(--accent-blue)}}.breadcrumbs{max-width:1200px;margin:0.3rem auto 0;padding:0 1rem;font-size:0.8rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.breadcrumbs a{color:var(--accent-blue);text-decoration:none}.breadcrumbs a:hover{text-decoration:underline}.breadcrumbs span{margin:0 0.4rem;color:var(--text-secondary)}.main-wrapper{max-width:1200px;margin:0 auto;padding:0.5rem 1rem;display:grid;grid-template-columns:1fr;gap:0.75rem}@media (min-width:992px){.main-wrapper{padding:1.5rem;gap:2rem;grid-template-columns:8fr 4fr}}.content-area{display:flex;flex-direction:column;gap:1.25rem}@media (min-width:992px){.content-area{gap:2rem}}.calculator-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:1.25rem 1rem;position:relative;overflow:hidden}@media (min-width:600px){.calculator-card{padding:1rem 1.25rem}}.calculator-card::before{content:'';position:absolute;top:0;left:0;right:0;height:5px;background:linear-gradient(90deg,var(--accent-primary),var(--accent-primary-gradient-end))}.calculator-title{font-size:1.15rem;font-weight:700;margin-bottom:1rem;text-align:center;color:var(--text-primary);line-height:1.3}@media (min-width:600px){.calculator-title{font-size:1.2rem;margin-bottom:0.75rem}}.calc-number-row{margin-bottom:0.5rem}.calc-number-row label{display:block;font-size:0.8rem;font-weight:600;color:var(--text-secondary);margin-bottom:0.4rem;text-transform:uppercase;letter-spacing:0.04em}.calc-input{width:100%;padding:0.55rem 0.85rem;font-size:1.1rem;font-weight:700;border:2px solid var(--border-color);border-radius:var(--radius-md);outline:none;transition:border-color 0.2s,box-shadow 0.2s;color:var(--text-primary);background-color:#fff}.calc-input:focus{border-color:var(--border-color-focus);box-shadow:0 0 0 3px var(--accent-primary-border)}.calc-unit-row{display:grid;grid-template-columns:1fr 42px 1fr;gap:0.5rem;align-items:end;margin-bottom:0.5rem}.input-group{display:flex;flex-direction:column;gap:0.4rem}.input-label{font-size:0.8rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:0.04em}.unit-select{width:100%;padding:0.5rem 0.5rem;font-size:0.875rem;font-weight:500;border:2px solid var(--border-color);border-radius:var(--radius-md);outline:none;background-color:#fff;color:var(--text-primary);cursor:pointer;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23475569' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 0.6rem center;padding-right:1.8rem;transition:border-color 0.2s;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.unit-select:focus{border-color:var(--border-color-focus);box-shadow:0 0 0 3px var(--accent-primary-border)}.unit-select optgroup{font-weight:700;color:var(--text-secondary);background-color:var(--bg-primary)}.unit-select option{font-weight:400;color:var(--text-primary);padding:0.25rem}.swap-btn-container{display:flex;justify-content:center;align-items:flex-end;padding-bottom:0.15rem}.swap-btn{background-color:var(--accent-primary-light);border:2px solid var(--accent-primary-border);color:var(--accent-primary);width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.1rem;transition:transform 0.25s ease,background-color 0.2s;flex-shrink:0}.swap-btn:hover,.swap-btn:active{background-color:var(--accent-primary);color:#fff;transform:rotate(180deg)}.btn-primary{background-color:var(--accent-orange);color:#ffffff;border:none;padding:0.65rem 1.5rem;font-size:1rem;font-weight:700;border-radius:var(--radius-md);cursor:pointer;transition:background-color 0.2s ease,transform 0.15s;width:100%;letter-spacing:0.02em}.btn-primary:hover,.btn-primary:active{background-color:var(--accent-orange-hover);transform:translateY(-1px)}.calculator-result{margin-top:0.5rem;background:linear-gradient(135deg,var(--accent-primary-light) 0%,var(--accent-primary-gradient-end) 100%);border:1.5px solid var(--accent-primary-border);padding:0.6rem 1rem;border-radius:var(--radius-md);text-align:center}.result-formula{font-size:0.85rem;color:var(--text-secondary);margin-bottom:0.15rem;font-weight:500}.result-value{font-size:1.5rem;font-weight:800;color:var(--accent-primary);line-height:1.2}.result-table{width:100%;border-collapse:collapse;margin-top:0.75rem;font-size:0.875rem}.result-table td{padding:0.45rem 0.6rem;border-bottom:1px solid rgba(37,99,235,.12);color:var(--text-secondary)}.result-table td:first-child{font-weight:600;color:var(--text-primary);width:55%}.result-table td:last-child{font-weight:700;color:var(--accent-primary);text-align:right}.unit-tabs{display:flex;gap:0.4rem;flex-wrap:wrap;margin-bottom:1rem}.unit-tab{background:var(--bg-primary);border:1.5px solid var(--border-color);color:var(--text-secondary);padding:0.4rem 0.85rem;border-radius:999px;font-size:0.82rem;font-weight:600;cursor:pointer;transition:all 0.15s;white-space:nowrap}.unit-tab.active,.unit-tab:hover{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.flex-input-group{display:grid;grid-template-columns:1fr 1fr;gap:0.75rem;margin-bottom:1rem}@media (min-width:480px){.flex-input-group{grid-template-columns:repeat(auto-fit,minmax(130px,1fr))}}.seo-article{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.25rem 1rem;box-shadow:var(--shadow-sm)}@media (min-width:600px){.seo-article{padding:2rem 1.75rem}}.seo-article h1{font-size:1.4rem;font-weight:800;color:var(--text-primary);margin-bottom:0.75rem;line-height:1.3;border-bottom:2px solid var(--accent-primary-light);padding-bottom:0.5rem}@media (min-width:600px){.seo-article h1{font-size:1.85rem}}.seo-article h2{font-size:1.2rem;font-weight:700;color:var(--text-primary);margin-top:1.5rem;margin-bottom:0.75rem;line-height:1.3}@media (min-width:600px){.seo-article h2{font-size:1.4rem}}.seo-article h3{font-size:1.05rem;font-weight:700;color:var(--text-primary);margin-top:1.25rem;margin-bottom:0.5rem}p,li,td,th{font-size:19px !important}h2{font-size:24.7px !important}h1{font-size:34px !important}.seo-article p{color:var(--text-secondary);margin-bottom:1rem;font-size:19px;line-height:1.7}.legal-page-wrapper{display:block;max-width:860px;margin:0 auto;padding-top:2rem}.legal-page ul{color:var(--text-secondary);margin:0 0 1.25rem 1.5rem}.legal-page a{color:var(--accent-blue);text-decoration:none;overflow-wrap:anywhere}.legal-page a:hover{text-decoration:underline}.legal-page-note{border-top:1px solid var(--border-color);margin-top:2rem;padding-top:1rem;font-size:0.95rem !important}@media (min-width:600px){.seo-article p{font-size:19px}}.formula-box{background-color:var(--bg-primary);border-left:4px solid var(--accent-primary);padding:0.85rem 1.25rem;margin:1.25rem 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:1rem;font-weight:600;color:var(--text-primary)}.table-container{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.25rem 0;border:1px solid var(--border-color);border-radius:var(--radius-md)}.conversion-table{width:100%;border-collapse:collapse;text-align:left;font-size:0.875rem;min-width:280px}.conversion-table th{background-color:var(--bg-primary);color:var(--text-primary);font-weight:700;padding:0.65rem 0.85rem;border-bottom:2px solid var(--border-color);white-space:nowrap;font-size:0.8rem;text-transform:uppercase;letter-spacing:0.04em}.conversion-table td{padding:0.6rem 0.85rem;border-bottom:1px solid var(--border-color);color:var(--text-secondary)}.conversion-table tr:last-child td{border-bottom:none}.conversion-table tr:nth-child(even) td{background-color:#f9fafb}.conversion-table tr:hover td{background-color:var(--accent-primary-light);color:var(--text-primary)}.conversion-table tr.highlighted td{background-color:var(--accent-primary-light);font-weight:700;color:var(--accent-primary)}.faq-section{margin-top:1.5rem}.faq-title{font-size:1.15rem;font-weight:700;margin-bottom:1rem;color:var(--text-primary)}@media (min-width:600px){.faq-title{font-size:1.35rem}}.faq-item{background-color:#fff;border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:0.6rem;overflow:hidden}.faq-question{padding:0.9rem 1rem;font-weight:600;font-size:0.95rem;color:var(--text-primary);cursor:pointer;display:flex;justify-content:space-between;align-items:center;user-select:none;transition:background-color 0.15s;gap:0.75rem;line-height:1.4}.faq-question:hover{background-color:var(--accent-primary-light)}.faq-question::after{content:'+';font-size:1.4rem;color:var(--accent-primary);font-weight:700;flex-shrink:0;transition:transform 0.2s;line-height:1}.faq-item.active .faq-question::after{content:'−'}.faq-answer{padding:0 1rem;max-height:0;overflow:hidden;transition:max-height 0.25s ease,padding 0.2s ease;font-size:0.95rem;color:var(--text-secondary);line-height:1.7}.faq-item.active .faq-answer{padding:0.85rem 1rem;max-height:600px;border-top:1px solid var(--border-color)}.sidebar{display:flex;flex-direction:column;gap:1rem}.widget-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.25rem;box-shadow:var(--shadow-sm)}.widget-title{font-size:1rem;font-weight:700;margin-bottom:0.85rem;padding-bottom:0.5rem;border-bottom:2px solid var(--bg-primary);color:var(--text-primary)}.widget-list{list-style:none;display:flex;flex-direction:column;gap:0.55rem}.widget-list a{color:var(--accent-blue);text-decoration:none;font-size:0.9rem;font-weight:500;display:flex;justify-content:space-between;align-items:center}.widget-list a:hover{color:var(--accent-blue-hover);text-decoration:underline}.search-widget{position:relative}.search-input{width:100%;padding:0.7rem 1rem 0.7rem 2.4rem;border:2px solid var(--border-color);border-radius:var(--radius-md);outline:none;font-size:0.95rem;background-color:#fff}.search-input:focus{border-color:var(--border-color-focus)}.search-icon{position:absolute;left:0.8rem;top:50%;transform:translateY(-50%);color:var(--text-secondary);pointer-events:none;font-size:1rem}.hero-section{text-align:center;padding:0.5rem 0 0.25rem}.hero-section h1{font-size:1.6rem;font-weight:800;color:var(--text-primary);line-height:1.25;margin-bottom:0.3rem}@media (min-width:600px){.hero-section h1{font-size:2.25rem}}.hero-section p{font-size:0.975rem;color:var(--text-secondary);max-width:560px;margin:0 auto 0.4rem;line-height:1.5}@media (min-width:600px){.hero-section p{font-size:1.05rem}}.dashboard-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width:540px){.dashboard-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width:992px){.dashboard-grid{grid-template-columns:repeat(2,1fr)}}.category-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.25rem;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:0.65rem;transition:transform 0.2s,box-shadow 0.2s}.category-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}.category-header{display:flex;align-items:center;gap:0.65rem}.category-icon{font-size:1.25rem;background-color:var(--accent-primary-light);color:var(--accent-primary);padding:0.4rem;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;width:38px;height:38px;flex-shrink:0}.category-name{font-size:1.05rem;font-weight:700;color:var(--text-primary)}.category-links{list-style:none;display:flex;flex-direction:column;gap:0.45rem;margin-top:0.25rem}.category-links a{color:var(--accent-blue);text-decoration:none;font-size:0.9rem;font-weight:500;padding:0.15rem 0;display:block}.category-links a:hover{text-decoration:underline}.all-tools-section{margin:2rem auto 3rem;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.25rem;box-shadow:var(--shadow-sm)}.all-tools-section h2{margin:0 0 0.4rem;color:var(--text-primary);font-size:1.35rem !important}.all-tools-section>p{color:var(--text-secondary);margin-bottom:1rem;font-size:0.95rem !important}.all-tools-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width:700px){.all-tools-grid{grid-template-columns:repeat(2,1fr)}}.all-tools-group{min-width:0}.all-tools-group h3{color:var(--text-primary);font-size:1rem;margin-bottom:0.6rem}.all-tools-group ul{columns:1;list-style:none}@media (min-width:700px){.all-tools-group ul{columns:2;column-gap:1rem}}.all-tools-group li{break-inside:avoid;margin-bottom:0.35rem}.all-tools-group a{color:var(--accent-blue);text-decoration:none;font-size:0.85rem;line-height:1.35}.all-tools-group a:hover{text-decoration:underline}.content-tabs{display:flex;gap:0;border-bottom:2px solid var(--border-color);margin-bottom:1.25rem;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.content-tabs::-webkit-scrollbar{display:none}.content-tab{padding:0.65rem 1rem;font-size:0.875rem;font-weight:600;color:var(--text-secondary);cursor:pointer;border:none;background:none;border-bottom:2.5px solid transparent;margin-bottom:-2px;white-space:nowrap;transition:color 0.15s,border-color 0.15s}.content-tab.active,.content-tab:hover{color:var(--accent-primary);border-bottom-color:var(--accent-primary)}.tab-panel{display:none}.tab-panel.active{display:block}footer{background-color:var(--text-primary);color:#94a3b8;padding:2rem 1rem 1.25rem;margin-top:0}@media (min-width:768px){footer{padding:3rem 1.5rem 1.5rem}}.footer-content{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;padding-bottom:1.5rem;border-bottom:1px solid #334155}@media (min-width:768px){.footer-content{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:2rem;padding-bottom:2rem}}.footer-column{display:flex;flex-direction:column;gap:0.75rem}.footer-logo{display:flex;align-items:center}.footer-logo-img{display:block;width:auto;height:44px;max-width:210px;object-fit:contain}.footer-column h4{color:#f1f5f9;font-size:0.9rem;font-weight:600}.footer-column ul{list-style:none;display:flex;flex-direction:column;gap:0.4rem}.footer-column ul a{color:#94a3b8;text-decoration:none;font-size:0.85rem;transition:color 0.2s}.footer-column ul a:hover{color:#ffffff}.footer-bottom{max-width:1200px;margin:0 auto;padding-top:1.25rem;display:flex;flex-direction:column;align-items:center;gap:0.6rem;font-size:0.8rem;text-align:center}@media (min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between;text-align:left}}.footer-bottom-links{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center}.footer-bottom-links a{color:#94a3b8;text-decoration:none;font-size:0.8rem}.footer-bottom-links a:hover{color:#ffffff}.text-center{text-align:center}.text-muted{color:var(--text-secondary)}.font-bold{font-weight:700}.mt-1{margin-top:0.5rem}.mt-2{margin-top:1rem}.mb-1{margin-bottom:0.5rem}.mb-2{margin-bottom:1rem}.badge{display:inline-block;padding:0.2rem 0.6rem;border-radius:999px;font-size:0.75rem;font-weight:600;background-color:var(--accent-primary-light);color:var(--accent-primary)}#scrollTopBtn{display:none;position:fixed;bottom:1.5rem;right:1.25rem;z-index:300;background-color:var(--accent-primary);color:#fff;border:none;border-radius:50%;width:44px;height:44px;font-size:1.25rem;cursor:pointer;box-shadow:var(--shadow-lg);align-items:center;justify-content:center;transition:background-color 0.2s,transform 0.2s}#scrollTopBtn.visible{display:flex}#scrollTopBtn:hover{background-color:var(--accent-primary-hover);transform:translateY(-2px)}