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rgba(var(--primary-color-rgb),.2);border-radius:var(--border-radius-full);font-size:var(--font-size-xs);font-weight:600;color:var(--primary-color);text-transform:uppercase;letter-spacing:.5px}.calculator-favorite-btn{background:none;border:none;color:var(--text-tertiary);cursor:pointer;padding:var(--spacing-xs);border-radius:var(--border-radius-sm);display:flex;align-items:center;justify-content:center;transition:all .2s ease;width:32px;height:32px}.calculator-favorite-btn:hover{background-color:rgba(var(--error-color-rgb),.1);color:var(--error-color);transform:scale(1.1)}.calculator-favorite-btn.active{color:var(--error-color)}.calculator-card-icon{font-size:3rem;margin-bottom:var(--spacing-md);text-align:center;transition:transform .3s ease}.calculator-card:hover .calculator-card-icon{transform:scale(1.1) rotate(5deg)}.calculator-card-content{flex:1;display:flex;flex-direction:column;gap:var(--spacing-sm)}.calculator-card-title{font-size:var(--font-size-lg);font-weight:700;color:var(--text-primary);margin:0;line-height:1.3}.calculator-card-description{font-size:var(--font-size-sm);color:var(--text-secondary);margin:0;line-height:1.6;flex:1}.calculator-card-footer{margin-top:var(--spacing-md);padding-top:var(--spacing-md);border-top:1px solid var(--border-color)}.calculator-card-cta{font-size:var(--font-size-sm);font-weight:600;color:var(--primary-color);display:flex;align-items:center;gap:var(--spacing-xs);transition:all .2s ease}.calculator-card:hover .calculator-card-cta{gap:var(--spacing-sm);color:var(--primary-dark)}.calculator-card.loading{pointer-events:none;opacity:.6}.calculator-card-link:focus-visible .calculator-card{outline:3px solid var(--primary-color);outline-offset:2px}@media (max-width: 768px){.calculator-card{padding:var(--spacing-md)}.calculator-card-icon{font-size:2.5rem}}.skeleton-container{width:100%}.skeleton-wrapper{margin-bottom:var(--spacing-md)}.skeleton{animation:skeleton-loading 1.5s ease-in-out infinite;background:linear-gradient(90deg,var(--bg-secondary) 0%,var(--bg-tertiary) 50%,var(--bg-secondary) 100%);background-size:200% 100%;border-radius:var(--border-radius-md)}@keyframes skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-calculator-card{padding:var(--spacing-lg);height:180px;border:1px solid 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var(--border-color);border-radius:var(--border-radius-lg);padding:var(--spacing-xl);display:flex;align-items:center;gap:var(--spacing-md);transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.stat-card:before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(180deg,var(--primary-color),var(--primary-light));transform:scaleY(0);transform-origin:bottom;transition:transform .3s ease}.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.stat-card:hover:before{transform:scaleY(1)}.stat-icon{font-size:2.5rem;flex-shrink:0}.stat-content{flex:1}.stat-value{font-size:var(--font-size-2xl);font-weight:700;color:var(--primary-color);line-height:1.2;margin-bottom:var(--spacing-xs)}.stat-label{font-size:var(--font-size-sm);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;font-weight:500}@media (max-width: 768px){.stats-grid{grid-template-columns:repeat(2,1fr)}.stat-card{padding:var(--spacing-lg)}.stat-icon{font-size:2rem}.stat-value{font-size:var(--font-size-xl)}}@media (max-width: 480px){.stats-grid{grid-template-columns:1fr}}.trending-calculators{padding:var(--spacing-xxl) 0;background:linear-gradient(135deg,var(--bg-primary) 0%,var(--bg-secondary) 100%);border-top:2px solid var(--border-color);border-bottom:2px solid var(--border-color);margin:var(--spacing-xxl) 0}.trending-header{text-align:center;margin-bottom:var(--spacing-xl)}.trending-title{font-size:var(--font-size-xxl);font-weight:700;color:var(--text-primary);margin-bottom:var(--spacing-sm);display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm)}.trending-icon{font-size:var(--font-size-2xl);animation:pulse 2s ease-in-out infinite}@keyframes 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h1{color:#fff;font-size:clamp(var(--font-size-2xl),6vw,var(--font-size-4xl));margin-bottom:var(--spacing-md);line-height:1.2}.hero-subtitle{font-size:clamp(var(--font-size-base),3vw,var(--font-size-lg));color:#fffffff2;margin-bottom:var(--spacing-lg);line-height:1.6}@media (min-width: 768px){.hero-subtitle{margin-bottom:var(--spacing-xl)}}.search-container{max-width:100%;margin:0 auto;width:100%}@media (min-width: 640px){.search-container{max-width:600px}}@media (min-width: 768px){.search-container{max-width:700px}}.search-wrapper{position:relative;display:flex;align-items:center;background-color:#fffffff2;border-radius:var(--border-radius-lg);box-shadow:var(--shadow-lg);transition:all .3s ease;overflow:hidden}.search-wrapper:focus-within{box-shadow:0 0 0 4px #ffffff4d,var(--shadow-xl);transform:scale(1.02)}.search-icon{position:absolute;left:var(--spacing-lg);color:var(--text-tertiary);pointer-events:none;z-index:1}.search-input{width:100%;padding:var(--spacing-md) var(--spacing-md) var(--spacing-md) 48px;min-height:48px;font-size:16px;border:none;background:transparent;color:var(--text-primary);transition:var(--transition);-webkit-appearance:none;-moz-appearance:none;appearance:none}@media (min-width: 768px){.search-input{padding:var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) 50px;font-size:var(--font-size-lg)}}.search-input::placeholder{color:var(--text-tertiary)}.search-input:focus{outline:none}.search-clear{position:absolute;right:var(--spacing-md);background:none;border:none;color:var(--text-tertiary);cursor:pointer;padding:var(--spacing-xs);border-radius:var(--border-radius-sm);display:flex;align-items:center;justify-content:center;transition:all .2s ease;z-index:1}.search-clear:hover{background-color:#0000000d;color:var(--text-primary)}[data-theme=dark] .search-wrapper{background-color:#1f2937f2}[data-theme=dark] 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0}}.section-title{text-align:center;margin-bottom:var(--spacing-md);font-size:var(--font-size-2xl);color:var(--primary-color)}.section-subtitle{text-align:center;margin-bottom:var(--spacing-xl);font-size:var(--font-size-lg);color:var(--text-secondary);max-width:800px;margin-left:auto;margin-right:auto}.calculators-grid{display:grid;grid-template-columns:1fr;gap:var(--spacing-md);width:100%}.calculator-card-category{display:inline-block;font-size:var(--font-size-xs);font-weight:600;color:var(--primary-color);background-color:#2563eb1a;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--border-radius);margin-bottom:var(--spacing-sm);text-transform:uppercase;letter-spacing:.5px}.no-results{text-align:center;padding:var(--spacing-2xl);color:var(--text-secondary);min-height:400px;display:flex;flex-direction:column;align-items:center;justify-content:center}.no-results-icon{font-size:4rem;margin-bottom:var(--spacing-lg);opacity:.5}.no-results h3{color:var(--text-primary);margin-bottom:var(--spacing-sm)}.no-results p{margin-bottom:var(--spacing-lg)}.features-section{padding:var(--spacing-xl) 0;background-color:var(--bg-primary)}@media (min-width: 768px){.features-section{padding:var(--spacing-2xl) 0}}.features-grid{display:grid;grid-template-columns:1fr;gap:var(--spacing-md);max-width:1200px;margin:0 auto}@media (min-width: 640px){.features-grid{grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}}@media (min-width: 1024px){.features-grid{grid-template-columns:repeat(3,1fr)}}@media (min-width: 1280px){.features-grid{grid-template-columns:repeat(4,1fr)}}.feature-card{background-color:var(--bg-secondary);border-radius:var(--border-radius);padding:var(--spacing-xl);text-align:center;box-shadow:var(--shadow-sm);transition:var(--transition);border-top:4px solid var(--primary-color)}.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-top-color:var(--secondary-color)}.feature-icon{font-size:3rem;margin-bottom:var(--spacing-md)}.feature-card h3{margin-bottom:var(--spacing-sm);color:var(--primary-color)}.feature-card p{color:var(--text-secondary);margin:0;line-height:1.6}.seo-content{padding:var(--spacing-2xl) 0;background-color:var(--bg-primary)}.seo-content h2{margin-bottom:var(--spacing-lg)}.seo-content h3{margin-top:var(--spacing-xl);margin-bottom:var(--spacing-md)}.seo-content ul{margin-left:var(--spacing-xl);margin-bottom:var(--spacing-lg)}.seo-content li{margin-bottom:var(--spacing-sm);color:var(--text-secondary)}.seo-content a{color:var(--primary-color);font-weight:600}@media (min-width: 640px){.calculators-grid{grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}}@media (min-width: 768px){.calculators-grid{grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}}@media (min-width: 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var(--border-color);background-color:var(--bg-primary);color:var(--text-secondary);border-radius:var(--border-radius);cursor:pointer;transition:var(--transition)}.category-btn:hover{border-color:var(--primary-color);color:var(--primary-color)}.category-btn.active{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color)}.category-section{margin-bottom:var(--spacing-2xl)}.category-section h2{margin-bottom:var(--spacing-lg);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--border-color)}.calculators-grid{display:grid;grid-template-columns:1fr;gap:var(--spacing-md)}.calculator-card-link{text-decoration:none;color:inherit;display:block;transition:var(--transition)}.calculator-card-link:hover{transform:translateY(-4px)}.calculator-card{background-color:var(--bg-primary);border-radius:var(--border-radius);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);transition:var(--transition);height:100%;border:2px solid transparent}.calculator-card-link:hover 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h1{margin-bottom:var(--spacing-md);color:var(--primary-color)}.about-intro{font-size:var(--font-size-lg);color:var(--text-secondary);max-width:800px;margin:0 auto}.about-section{margin-bottom:var(--spacing-2xl)}.about-section:last-child{margin-bottom:0}.about-section h2{color:var(--primary-color);margin-bottom:var(--spacing-md);font-size:var(--font-size-xl);padding-bottom:var(--spacing-sm);border-bottom:1px solid var(--border-color)}.about-section p{margin-bottom:var(--spacing-md);line-height:1.8;color:var(--text-secondary)}.about-section ul{margin-left:var(--spacing-xl);margin-bottom:var(--spacing-md)}.about-section li{margin-bottom:var(--spacing-sm);line-height:1.8;color:var(--text-secondary)}.about-section a{color:var(--primary-color);font-weight:600;text-decoration:underline}.about-section 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auto}.faq-category{margin-bottom:var(--spacing-2xl);background-color:var(--bg-primary);border-radius:var(--border-radius);padding:var(--spacing-xl);box-shadow:var(--shadow-sm)}.category-title{font-size:var(--font-size-xl);color:var(--primary-color);margin-bottom:var(--spacing-lg);padding-bottom:var(--spacing-md);border-bottom:2px solid var(--border-color)}.faq-list{display:flex;flex-direction:column;gap:var(--spacing-sm)}.faq-item{border:1px solid var(--border-color);border-radius:var(--border-radius);overflow:hidden;transition:var(--transition)}.faq-item:hover{box-shadow:var(--shadow-sm)}.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md) 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#0000001a;border-left-width:5px}.result-item:hover:after{left:100%}.result-label{font-weight:600;color:var(--text-primary);flex:1}.result-value{font-weight:700;font-size:var(--font-size-lg);color:var(--primary-color);text-align:right;word-break:break-word}.calculation-history{margin-top:var(--spacing-lg);padding:var(--spacing-lg)}.calculation-history h3{margin-bottom:var(--spacing-md);font-size:var(--font-size-lg)}.history-list{list-style:none;margin:0;padding:0}.history-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm) 0;border-bottom:1px solid var(--border-color)}.history-item:last-child{border-bottom:none}.history-time{font-size:var(--font-size-sm);color:var(--text-secondary)}.history-load{background:none;border:1px solid var(--primary-color);color:var(--primary-color);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--border-radius);cursor:pointer;font-size:var(--font-size-sm);transition:var(--transition)}.history-load:hover{background-color:var(--primary-color);color:var(--bg-primary)}.keyboard-shortcuts{margin-top:var(--spacing-lg);padding:var(--spacing-md)}.keyboard-shortcuts summary{cursor:pointer;font-weight:600;color:var(--text-secondary);font-size:var(--font-size-sm);-webkit-user-select:none;user-select:none}.keyboard-shortcuts summary:hover{color:var(--primary-color)}.keyboard-shortcuts ul{list-style:none;margin-top:var(--spacing-sm);padding:0}.keyboard-shortcuts li{padding:var(--spacing-xs) 0;font-size:var(--font-size-sm);color:var(--text-secondary)}.keyboard-shortcuts kbd{background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:4px;padding:2px 6px;font-family:monospace;font-size:.85em;box-shadow:0 1px 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768px){html{-webkit-overflow-scrolling:touch}body{overflow-x:hidden;position:relative}}.loading{opacity:.6;pointer-events:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.formula-section{margin-top:var(--spacing-xl);padding:var(--spacing-lg);background:linear-gradient(135deg,#2563eb0d,#10b9810d);border-left:4px solid var(--primary-color);border-radius:var(--border-radius);border-top:1px solid var(--border-color)}.formula-header{margin-bottom:var(--spacing-md);color:var(--primary-color);font-size:var(--font-size-lg)}.formula-content{color:var(--text-secondary);line-height:1.8}.formula-content p{margin:var(--spacing-sm) 0}.formula-content ul{margin:var(--spacing-md) 0;padding-left:var(--spacing-xl);list-style-type:disc}.formula-content li{margin:var(--spacing-xs) 0}.formula-content strong{color:var(--text-primary);font-weight:600}.formula-note{margin-top:var(--spacing-md);padding:var(--spacing-sm);background-color:var(--bg-secondary);border-radius:var(--border-radius-sm);font-size:var(--font-size-sm);font-style:italic}[data-theme=dark] .location-info{background:linear-gradient(135deg,#3b82f626,#10b98126);border-left-color:var(--primary-color)}[data-theme=dark] .form-help-text{background-color:var(--bg-tertiary);border-left-color:var(--primary-color)}[data-theme=dark] .keyboard-shortcuts,[data-theme=dark] .calculation-history,[data-theme=dark] .result-item{background-color:var(--bg-tertiary)}[data-theme=dark] .result-item:hover{background-color:#3b82f61a}[data-theme=dark] .highlight-result{background:linear-gradient(135deg,#3b82f633,#10b98133)}[data-theme=dark] .hero{background:linear-gradient(135deg,#1e3a8a,#1e40af)}[data-theme=dark] .feature-card,[data-theme=dark] .testimonial-card,[data-theme=dark] .step-card,[data-theme=dark] .tip-card,[data-theme=dark] .example-card,[data-theme=dark] .calculator-card,[data-theme=dark] .card{background-color:var(--bg-secondary)}[data-theme=dark] .cookie-consent{background-color:var(--bg-secondary);border-top-color:var(--border-color)}