:root{color-scheme:dark;--bg:#08111e;--bg2:#0c1829;--panel:#111e30;--panel2:#142439;--line:#2a3b51;--text:#f1f6fb;--muted:#b3c3d3;--accent:#5de3ca;--accent2:#82a5ff;--danger:#ffb3ad;--radius:18px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(ellipse at 70% 0%,rgba(40,89,109,.15),transparent 40%),var(--bg);color:var(--text);line-height:1.65}a{color:inherit}a:hover{color:var(--accent)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--accent2);outline-offset:3px}button,input,select,textarea{font:inherit}button{cursor:pointer}button:hover{filter:brightness(1.07)}.container{max-width:1160px;margin:auto;padding:0 24px}.site-header{border-bottom:1px solid var(--line);background:rgba(8,17,30,.91)}.header-inner{min-height:78px;display:flex;gap:24px;align-items:center;justify-content:space-between}.logo{font-weight:850;text-decoration:none;letter-spacing:-.05em;font-size:23px;display:inline-flex;gap:9px;align-items:center;white-space:nowrap}.logo-mark{width:31px;height:31px;border-radius:10px;background:var(--accent);color:#071722;display:grid;place-items:center;font-weight:900;font-size:20px;letter-spacing:-.05em}.logo strong{color:var(--accent)}.main-nav{display:flex;align-items:center;gap:24px;font-size:14px;color:var(--muted)}.main-nav a{text-decoration:none}.main-nav .language-link{border:1px solid var(--line);padding:6px 12px;border-radius:99px;color:var(--text);font-weight:700}.hero{padding:82px 0 56px}.eyebrow{text-transform:uppercase;letter-spacing:.16em;color:var(--accent);font-size:12px;font-weight:800}.hero h1{max-width:880px;font-size:clamp(38px,6vw,68px);line-height:1.08;letter-spacing:-.055em;margin:20px 0 20px}.lead{max-width:680px;color:var(--muted);font-size:19px;line-height:1.7}.accent{color:var(--accent)}.hero-tools{margin:36px 0 12px;max-width:630px}.search-box{height:58px;display:flex;align-items:center;gap:12px;border:1px solid #496078;border-radius:13px;background:var(--panel);padding:0 18px;box-shadow:0 10px 35px rgba(0,0,0,.13)}.search-box svg{width:21px;stroke:var(--accent)}.search-box input{background:transparent;color:var(--text);outline:0;border:0;width:100%;height:100%}.search-box input::placeholder{color:#9fb1c6}.search-note{font-size:13px;color:var(--muted);margin-top:10px}.section{padding:34px 0 64px}.section-title{font-size:clamp(24px,3vw,33px);margin:0 0 6px;letter-spacing:-.035em}.section-desc{color:var(--muted);margin:0 0 26px}.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.tool-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:23px;text-decoration:none;display:flex;flex-direction:column;min-height:207px;transition:transform .18s,border-color .18s}.tool-card:hover{transform:translateY(-3px);border-color:var(--accent);color:var(--text)}.tool-card[hidden]{display:none}.card-icon{display:grid;place-items:center;border-radius:12px;width:43px;height:43px;background:#17394a;color:var(--accent);font-weight:850;font-size:21px}.card-title{font-size:17px;font-weight:750;margin:17px 0 7px;line-height:1.35}.card-subtitle{font-size:13px;color:var(--muted);line-height:1.45}.card-arrow{margin-top:auto;padding-top:14px;color:var(--accent);font-size:13px;font-weight:750}.feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:14px}.feature{border:1px solid var(--line);border-radius:var(--radius);padding:24px}.feature strong{display:block;margin-bottom:7px}.feature p{color:var(--muted);font-size:14px;margin:0}.page-intro{padding:52px 0 24px}.breadcrumbs{font-size:13px;color:var(--muted);margin:0 0 26px}.breadcrumbs a{text-decoration:none}.page-intro h1{max-width:820px;font-size:clamp(32px,4.5vw,53px);line-height:1.14;letter-spacing:-.05em;margin:10px 0}.page-intro .lead{font-size:17px;max-width:780px}.tool-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(260px,.85fr);gap:22px;align-items:start;margin-bottom:62px}.tool-panel,.side-panel,.reading-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px}.tool-panel h2,.side-panel h2{margin:0 0 19px;font-size:21px;line-height:1.35}.side-panel p,.side-panel li{color:var(--muted);font-size:14px}.side-panel ul{padding-left:20px}.side-panel li{margin:6px 0}.fields-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.field{display:flex;flex-direction:column;gap:8px;min-width:0}.field span{font-size:13px;font-weight:700;color:#d6e2ee}.field input,.field select,.field textarea{width:100%;background:var(--bg2);border:1px solid #42566e;border-radius:10px;color:var(--text);padding:12px;min-height:47px}.field textarea{min-height:84px}.field.full{grid-column:1/-1}.checkbox-field{flex-direction:row;align-items:center;grid-column:1/-1;padding-top:15px}.checkbox-field input{width:18px;min-height:auto;height:18px;accent-color:var(--accent)}.field-note{font-size:13px;color:var(--muted);margin:13px 0 0}.tool-output{background:var(--bg2);border:1px solid #30545a;border-radius:15px;margin-top:22px;padding:22px;min-height:118px}.tool-output.has-error{border-color:#a94849;color:var(--danger)}.tool-output .eyebrow{margin:0 0 12px}.results-grid{margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.result-item dt{color:var(--muted);font-size:12px}.result-item dd{margin:4px 0 0;font-size:20px;font-weight:800;line-height:1.3;overflow-wrap:anywhere}.result-item.primary dd{font-size:30px;color:var(--accent)}.reading-panel{max-width:845px;background:transparent;padding:0;border:0;margin-bottom:70px}.reading-panel h2{font-size:27px;margin:30px 0 10px}.reading-panel h3{font-size:19px;margin:24px 0 8px}.reading-panel p,.reading-panel li{color:#c4d2df}.reading-panel ul{padding-left:22px}.reading-panel code{background:var(--panel2);border:1px solid var(--line);border-radius:4px;padding:2px 5px}.notice{border-left:3px solid var(--accent);padding:13px 17px;background:var(--panel);font-size:14px;color:var(--muted);border-radius:4px}.barcode-art{overflow:auto;background:white;padding:8px;border-radius:10px;max-width:max-content}.barcode-art svg{display:block;max-width:100%;height:auto}.barcode-number{font-size:14px;color:var(--muted)}.download-btn,.cta{display:inline-flex;text-decoration:none;border:0;border-radius:10px;padding:11px 17px;background:var(--accent);color:#071722;font-weight:800}.site-footer{border-top:1px solid var(--line);padding:35px 0 42px;color:var(--muted);font-size:13px}.footer-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}.footer-inner a{color:var(--muted);margin-left:15px}.footer-inner a:hover{color:var(--accent)}.language-small{font-size:13px}.empty-search{color:var(--muted);font-size:14px}.skip-link{position:absolute;left:-999px;top:8px;padding:10px;background:var(--accent);color:#000;z-index:30}.skip-link:focus{left:8px}.root-choice{display:flex;gap:14px;flex-wrap:wrap;margin:22px 0}.root-choice a{border:1px solid var(--line);padding:16px 25px;border-radius:12px;text-decoration:none;background:var(--panel);font-weight:700}
@media(max-width:1000px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.tool-layout{grid-template-columns:1fr}}@media(max-width:670px){.container{padding:0 17px}.header-inner{min-height:68px}.logo{font-size:19px}.main-nav{gap:10px;font-size:12px}.hero{padding:52px 0 30px}.hero h1{font-size:39px}.lead{font-size:16px}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.tool-card{padding:15px;min-height:195px}.feature-strip{grid-template-columns:1fr}.fields-grid,.results-grid{grid-template-columns:1fr}.tool-panel,.side-panel{padding:19px}.page-intro{padding:33px 0 12px}.footer-inner{align-items:flex-start;flex-direction:column}.footer-inner a:first-child{margin-left:0}}
@media(max-width:360px){.card-grid{grid-template-columns:1fr}.tool-card{min-height:150px}}

/* v0.2: accessible category filters and related tool navigation */
.filter-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}.filter-tab{color:var(--text);background:var(--panel);border:1px solid var(--line);padding:9px 15px;border-radius:999px;font-size:.9rem}.filter-tab[aria-pressed="true"]{background:var(--accent);color:#06171b;border-color:var(--accent);font-weight:750}.related-list{margin:12px 0 20px;padding-left:20px}.related-list li{margin:12px 0}.related-list a{text-decoration:underline;text-underline-offset:3px}.tool-card[hidden]{display:none!important}@media(max-width:600px){.filter-tabs{gap:7px}.filter-tab{padding:8px 11px;font-size:.83rem}}

/* v0.3 secure bilingual contact form */
.contact-form-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(20px,3vw,34px);margin:22px 0 55px;max-width:850px}.contact-form-panel h2{font-size:clamp(21px,2.6vw,28px);margin:0 0 6px}.contact-intro,.contact-info,.contact-muted{color:var(--muted);font-size:14px}.contact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;margin-top:24px}.contact-label{display:flex;flex-direction:column;gap:7px;color:var(--text);font-size:14px;font-weight:700;min-width:0}.contact-label span{display:block}.contact-label input,.contact-label select,.contact-label textarea{font:inherit;color:var(--text);background:var(--bg2);width:100%;border:1px solid #496078;border-radius:10px;min-height:48px;padding:12px}.contact-label textarea{min-height:155px;resize:vertical}.contact-label small{font-weight:400;color:var(--muted)}.contact-wide{grid-column:1/-1}.contact-honeypot{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important}.contact-captcha{margin:23px 0 16px;min-height:78px}.contact-agreement{display:flex;gap:12px;align-items:flex-start;font-size:14px;line-height:1.6}.contact-agreement input{width:18px;height:18px;flex:none;margin-top:4px;accent-color:var(--accent)}.contact-agreement a{color:var(--accent)}.contact-submit{display:inline-flex;justify-content:center;align-items:center;gap:8px;background:var(--accent);color:#071722!important;font-weight:800;border:0;border-radius:11px;padding:14px 21px;margin:8px 0 4px;text-decoration:none;cursor:pointer}.contact-submit:hover{filter:brightness(1.06)}.contact-form input:focus-visible,.contact-form select:focus-visible,.contact-form textarea:focus-visible{outline:3px solid var(--accent2);outline-offset:2px}@media(max-width:640px){.contact-grid{grid-template-columns:1fr}.contact-form-panel{margin:12px 0 40px}.contact-submit{width:100%}}

/* v0.5 accessible example tables */
.reading-panel table{width:100%;border-collapse:collapse;margin:18px 0 20px;font-variant-numeric:tabular-nums;font-size:clamp(13px,1.7vw,15px)}
.reading-panel th,.reading-panel td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.reading-panel th{color:var(--text);font-weight:700;background:var(--panel2)}
.reading-panel td{color:var(--muted)}
.reading-panel table tr:last-child td{border-bottom:0}
@media(max-width:440px){.reading-panel th,.reading-panel td{padding:8px 7px}}

/* v0.7 — accessible browsing and responsive reading improvements */
.search-status{color:var(--muted);font-size:14px;margin:0 0 17px;min-height:1.4em}
.reading-panel{overflow-wrap:anywhere}
.reading-panel a{text-underline-offset:3px;text-decoration-thickness:1px}
.reading-panel a:focus-visible{border-radius:3px}
.tool-card:focus-visible{outline:3px solid var(--accent2);outline-offset:4px}
@media(max-width:670px){.reading-panel h2{font-size:23px;line-height:1.25}.reading-panel h3{font-size:18px;line-height:1.3}.hero h1{overflow-wrap:break-word}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tool-card{transition:none}.tool-card:hover{transform:none}}

/* v0.11: explicit hidden-fields rule survives authored .field display:flex. */
.field[hidden]{display:none!important}
.fields-grid>.field-note{grid-column:1/-1}
.tool-actions{display:flex;flex-wrap:wrap;gap:10px;margin:15px 0 0}
.tool-actions .download-btn{flex:1 1 150px}
.tool-actions .download-btn:disabled{opacity:.55;cursor:not-allowed}

/* v0.12 bilingual unit-price comparison cards */
.unit-offer{border:1px solid var(--line);border-radius:14px;padding:15px;margin:12px 0;min-width:0}
.unit-offer legend{color:var(--text);font-weight:750;padding:0 8px}
.unit-offer .fields-grid{margin:0}
@media(max-width:440px){.unit-offer{padding:10px}.unit-offer .fields-grid{grid-template-columns:1fr;gap:12px}}

/* v0.12 QA: prevent the longer Italian header links from overflowing mobile viewports. */
@media(max-width:540px){
  .header-inner{flex-wrap:wrap;justify-content:center;row-gap:10px;padding-top:12px;padding-bottom:12px}
  .main-nav{width:100%;justify-content:center;flex-wrap:wrap;gap:8px 12px;min-width:0}
  .main-nav .language-link{padding:6px 10px}
}

/* v0.13: image-ratio preview with bounded dimensions and keyboard-visible controls */
.aspect-preview-wrap{margin-top:18px}
.aspect-preview-wrap h3{font-size:16px;margin:0 0 12px}
.aspect-preview{display:block;width:min(100%,240px);aspect-ratio:16/9;max-height:260px;min-height:24px;border:2px solid var(--accent);border-radius:8px;background:linear-gradient(135deg,var(--bg2),var(--panel));position:relative}
.aspect-preview:after{content:'↔';position:absolute;inset:0;display:grid;place-items:center;color:var(--text);font-weight:700}
.field input[type=file]{padding:8px;max-width:100%;height:auto;min-height:47px}
.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible,.download-btn:focus-visible{outline:3px solid var(--accent2);outline-offset:2px}
.tool-output{overflow-wrap:anywhere}
@media(max-width:440px){.tool-actions{flex-direction:column}.tool-actions .download-btn{flex-basis:auto}}

/* Reserve stable vertical room for the progressive image calculator UI to reduce layout shift. */
#tool-app[data-tool-v06="aspect"]{min-height:720px}
@media(max-width:670px){#tool-app[data-tool-v06="aspect"]{min-height:940px}}