:root{--color-primary: #1a64d6;--color-primary-dark: #1254b8;--color-primary-light: #e6f0ff;--color-secondary: #34c3b5;--color-secondary-dark: #2a9d8f;--color-accent: #f4812b;--color-accent-light: #fff1e6;--color-success: #38b27b;--color-warning: #f9cc4a;--color-error: #e53e3e;--color-text: #333333;--color-text-light: #666666;--color-text-lighter: #888888;--color-background: #ffffff;--color-background-alt: #f8f9fa;--color-border: #e5e7eb;--font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--spacing-0: 0;--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-5: 1.25rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--spacing-10: 2.5rem;--spacing-12: 3rem;--spacing-16: 4rem}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{font-family:var(--font-sans);color:var(--color-text);line-height:1.5;background-color:var(--color-background)}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--spacing-4)}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin-bottom:var(--spacing-4);color:var(--color-text)}h1{font-size:2rem}h2{font-size:1.75rem;margin-top:var(--spacing-8);position:relative;padding-bottom:var(--spacing-3)}h2:after{content:"";position:absolute;bottom:0;left:0;width:80px;height:3px;background-color:var(--color-primary);border-radius:3px}h3{font-size:1.4rem;margin-top:var(--spacing-6);margin-bottom:var(--spacing-3)}h4{font-size:1.2rem;margin-bottom:var(--spacing-2)}p,ul,ol{margin-bottom:var(--spacing-4)}mark{background-color:var(--color-accent-light);color:var(--color-text);padding:0 3px;border-radius:var(--radius-sm)}a{color:var(--color-primary);text-decoration:none;transition:color .2s ease-in-out}a:hover,a:focus{color:var(--color-primary-dark);text-decoration:underline}header{background-color:var(--color-background);position:sticky;top:0;box-shadow:var(--shadow-sm);z-index:100;padding:var(--spacing-3) 0;border-bottom:1px solid var(--color-border)}.brand{display:flex;align-items:center;gap:var(--spacing-2)}.brand h1 a{color:var(--color-text);text-decoration:none}.brand h1 a:hover{color:var(--color-primary);text-decoration:none}.logo{color:var(--color-primary)}nav ul{display:flex;list-style:none;margin:0}nav li{margin-left:var(--spacing-6)}nav a{text-decoration:none;color:var(--color-text);font-weight:500;padding:var(--spacing-2) 0;position:relative}nav a:after{content:"";position:absolute;width:0;height:2px;bottom:0;left:0;background-color:var(--color-primary);transition:width .3s ease}nav a:hover:after,nav a.active:after{width:100%}nav a.active{color:var(--color-primary)}header .container{display:flex;justify-content:space-between;align-items:center}main{padding:var(--spacing-8) 0}section{margin-bottom:var(--spacing-16)}.calculator-section{background-color:var(--color-primary-light);padding:var(--spacing-8);border-radius:var(--radius-lg);margin-bottom:var(--spacing-12)}.calculator-section h2{text-align:center;margin-bottom:var(--spacing-6)}.calculator-section h2:after{left:50%;transform:translate(-50%)}.instructions{max-width:800px;margin:0 auto var(--spacing-6);text-align:center;color:var(--color-text-light)}.calculator{max-width:600px;margin:0 auto;background-color:var(--color-background);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:var(--spacing-6)}.converter-container{display:flex;flex-direction:column;gap:var(--spacing-4)}.converter-box{padding:var(--spacing-4);border-radius:var(--radius-md);background-color:var(--color-background-alt);display:flex;flex-direction:column;gap:var(--spacing-3);transition:transform .2s ease,box-shadow .2s ease}.converter-box:hover,.converter-box:focus-within{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.converter{display:flex;flex-direction:column;gap:var(--spacing-2)}.converter label{font-weight:600;color:var(--color-text)}.input-group{display:flex;align-items:center;position:relative}.input-group input{width:100%;padding:var(--spacing-3);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:1.1rem;transition:border .2s ease,box-shadow .2s ease;-webkit-appearance:none;-moz-appearance:textfield}.input-group input::-webkit-outer-spin-button,.input-group input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.input-group input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px #1a64d633}.input-group .unit{position:absolute;right:var(--spacing-4);color:var(--color-text-lighter);font-weight:500;pointer-events:none}.result{background-color:var(--color-primary-light);padding:var(--spacing-3) var(--spacing-4);border-radius:var(--radius-md);font-weight:600;color:var(--color-primary-dark);font-size:1.1rem;display:flex;justify-content:center;align-items:center;min-height:48px}.separator{display:flex;justify-content:center;align-items:center;font-size:1.5rem;color:var(--color-text-light)}#calcola-btn{background-color:var(--color-primary);color:#fff;border:none;padding:12px 24px;border-radius:var(--radius-md);font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:var(--shadow-sm)}#calcola-btn:hover{background-color:var(--color-primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}#calcola-btn:active{transform:translateY(0);box-shadow:var(--shadow-sm)}#calcola-btn:focus{outline:none;box-shadow:0 0 0 2px #1a64d64d}.info-section{max-width:800px;margin:0 auto}.info-section article{margin-bottom:var(--spacing-10)}.formula{font-weight:700;text-align:center;padding:var(--spacing-4);margin:var(--spacing-4) 0;background-color:var(--color-primary-light);border-radius:var(--radius-md);color:var(--color-primary-dark)}.diagram{display:flex;flex-direction:column;gap:var(--spacing-2);margin:var(--spacing-4) 0;padding:var(--spacing-4);background-color:var(--color-background-alt);border-radius:var(--radius-md)}.ruler{height:40px;position:relative;border-radius:var(--radius-sm)}.ruler.inch{background-color:var(--color-primary-light);width:254px}.ruler.cm{background-color:var(--color-secondary-light, #e6fff9);width:254px;display:flex}.inch-marker,.cm-marker{position:absolute;width:2px;height:16px;bottom:0;background-color:currentColor}.inch-marker:nth-child(1){left:0}.inch-marker:nth-child(2){right:0}.cm-marker{position:relative;flex:1;border-right:2px solid var(--color-secondary-dark)}.cm-marker:last-child{border-right:none}figure{margin:var(--spacing-6) 0}figcaption{text-align:center;font-style:italic;color:var(--color-text-light);margin-top:var(--spacing-2)}details{background-color:var(--color-background-alt);border-radius:var(--radius-md);padding:var(--spacing-4);margin:var(--spacing-4) 0}summary{font-weight:600;cursor:pointer;padding:var(--spacing-1) 0}details[open] summary{margin-bottom:var(--spacing-3)}summary::-webkit-details-marker{color:var(--color-primary)}ul,ol{padding-left:var(--spacing-6)}li{margin-bottom:var(--spacing-2)}.table-section{overflow:hidden}.table-container{overflow-x:auto;margin:var(--spacing-6) 0;box-shadow:var(--shadow-sm);border-radius:var(--radius-md)}table{width:100%;border-collapse:collapse;border:1px solid var(--color-border);background-color:var(--color-background);font-size:.9rem}caption{font-weight:700;padding:var(--spacing-4);background-color:var(--color-primary-light);caption-side:top;text-align:center}th,td{padding:var(--spacing-3) var(--spacing-4);text-align:left;border:1px solid var(--color-border)}th{background-color:var(--color-background-alt);font-weight:600}tr:nth-child(2n){background-color:var(--color-background-alt)}tr:hover{background-color:var(--color-primary-light)}.legal-section{max-width:900px;margin:0 auto;line-height:1.6}.legal-section h1{font-size:2.5rem;margin-bottom:var(--spacing-4);color:var(--color-primary);text-align:center}.legal-section .last-updated{text-align:center;color:var(--color-text-light);font-style:italic;margin-bottom:var(--spacing-8);padding-bottom:var(--spacing-4);border-bottom:1px solid var(--color-border)}.legal-section article{margin-bottom:var(--spacing-8)}.legal-section h2{font-size:1.5rem;color:var(--color-primary);margin-top:var(--spacing-8);margin-bottom:var(--spacing-4)}.legal-section h3{font-size:1.2rem;color:var(--color-text);margin-top:var(--spacing-6);margin-bottom:var(--spacing-3)}.legal-section ul{margin-bottom:var(--spacing-4)}.legal-section li{margin-bottom:var(--spacing-2)}.legal-section address{font-style:normal;background-color:var(--color-background-alt);padding:var(--spacing-4);border-radius:var(--radius-md);margin:var(--spacing-4) 0}.legal-section time{font-weight:600}.legal-section strong{color:var(--color-primary-dark)}.legal-section em{color:var(--color-text-light)}footer{background-color:var(--color-background-alt);padding:var(--spacing-10) 0;border-top:1px solid var(--color-border)}.footer-content{display:flex;justify-content:space-between;flex-wrap:wrap;gap:var(--spacing-8)}.footer-info{flex:1;min-width:260px}.footer-links{min-width:160px}.footer-links ul{list-style:none;padding:0;margin:0}.footer-links li{margin-bottom:var(--spacing-2)}@media (min-width: 640px){.converter-container{flex-direction:row;align-items:center;gap:var(--spacing-2)}.converter-box{flex:1}.separator{transform:rotate(90deg)}}@media (max-width: 768px){h1{font-size:1.6rem}h2{font-size:1.4rem}h3{font-size:1.2rem}.calculator-section{padding:var(--spacing-6) var(--spacing-4)}.calculator{padding:var(--spacing-4)}.converter-box{padding:var(--spacing-3)}.input-group input{font-size:1rem;padding:var(--spacing-3) var(--spacing-10) var(--spacing-3) var(--spacing-3)}.result{font-size:1rem;padding:var(--spacing-3)}.footer-content{flex-direction:column;gap:var(--spacing-6)}.legal-section h1{font-size:2rem}#calcola-btn{padding:10px 20px;font-size:1rem}}@media (max-width: 480px){header .container{flex-direction:column;gap:var(--spacing-4)}nav ul{justify-content:center}nav li{margin:0 var(--spacing-2)}.brand{justify-content:center}h1{font-size:1.4rem}h2{font-size:1.3rem}h3{font-size:1.1rem}.calculator-section{padding:var(--spacing-4) var(--spacing-2)}.calculator{padding:var(--spacing-3)}.converter-box{padding:var(--spacing-2)}.input-group input{font-size:16px;padding:var(--spacing-3) var(--spacing-8) var(--spacing-3) var(--spacing-3)}.input-group .unit{right:var(--spacing-3);font-size:.9rem}.result{font-size:.95rem;padding:var(--spacing-2);min-height:44px}.legal-section h1{font-size:1.8rem}#calcola-btn{padding:12px 20px;font-size:1rem;width:100%;max-width:200px}}@keyframes highlight{0%{background-color:var(--color-primary-light)}50%{background-color:#1a64d64d}to{background-color:var(--color-primary-light)}}.result span{display:inline-block;min-width:60px;text-align:right;transition:all .3s ease}.result span.highlight{animation:highlight .5s ease-in-out}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}input:focus-visible{outline: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}