:root{
  --bg:#101112;
  --card:#181a1f;
  --card2:#22262d;
  --panel:#1d2026;
  --border:rgba(255,255,255,0.09);
  --border-strong:rgba(255,255,255,0.16);
  --text:#f4f1ea;
  --muted:#98a1ad;
  --muted2:#adb5c2;
  --amber:#eeb24a;
  --amber-soft:#f6c96f;
  --green:#34c78f;
  --blue:#58aeea;
  --radius:8px;
  --font-sans:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:Consolas,"SFMono-Regular",monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);}
img{display:block;max-width:100%;}
a{color:inherit;}
:focus-visible{outline:2px solid var(--amber);outline-offset:4px;border-radius:3px;}
.skip-link{position:fixed;top:8px;left:8px;z-index:1000;padding:10px 14px;background:#fff;color:#111;transform:translateY(-160%);}
.skip-link:focus{transform:translateY(0);}

.site-header{
  position:sticky;
  top:0;
  z-index:20;
  min-height:66px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:0 max(20px,calc((100vw - 1040px)/2));
  background:rgba(11,13,14,0.94);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(12px);
}
.site-nav{display:flex;align-items:center;gap:22px;font-size:13px;font-weight:700;}
.site-nav a{color:var(--muted2);text-decoration:none;}
.site-nav a:hover,.site-nav a:focus-visible,.site-nav a[aria-current="page"]{color:var(--text);}
.site-nav a[aria-current="page"]{position:relative;}
.site-nav a[aria-current="page"]::after{content:"";position:absolute;right:0;bottom:-9px;left:0;height:2px;background:var(--amber);}
.nav-tools-mobile{display:none;}

.shell{width:min(1080px,calc(100% - 40px));margin-inline:auto;}
.blog-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);background:linear-gradient(140deg,#111315 0%,#181a1f 72%,#1c211f 100%);}
.blog-hero::after{
  content:"";
  position:absolute;
  top:-160px;
  right:max(-160px,calc((100vw - 1080px)/2 - 160px));
  width:540px;
  height:540px;
  border:1px solid rgba(238,178,74,0.12);
  border-radius:50%;
  box-shadow:0 0 0 70px rgba(52,199,143,0.025),0 0 0 140px rgba(88,174,234,0.02);
}
.blog-hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:78px;align-items:end;padding-block:96px 88px;}
.eyebrow,.section-kicker,.article-category{margin:0 0 14px;color:var(--amber);font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;}
.blog-hero h1{max-width:760px;margin:0;font-size:clamp(44px,6vw,72px);line-height:1.03;letter-spacing:-.035em;}
.blog-hero-copy{max-width:660px;margin:26px 0 0;color:var(--muted2);font-size:18px;line-height:1.7;}
.hero-note{padding:24px;border:1px solid var(--border-strong);border-radius:var(--radius);background:rgba(16,17,18,.56);}
.hero-note-label{margin:0 0 18px;color:var(--muted);font:700 11px var(--font-mono);letter-spacing:.06em;text-transform:uppercase;}
.hero-note ol{list-style:none;margin:0;padding:0;counter-reset:steps;}
.hero-note li{position:relative;margin:0;padding:12px 0 12px 36px;border-top:1px solid var(--border);color:var(--muted2);font-size:13px;line-height:1.45;counter-increment:steps;}
.hero-note li::before{content:"0" counter(steps);position:absolute;top:13px;left:0;color:var(--green);font:700 11px var(--font-mono);}

.blog-section{padding-block:82px;}
.blog-section-alt{border-block:1px solid var(--border);background:var(--card);}
.section-heading{display:flex;justify-content:space-between;gap:48px;align-items:end;margin-bottom:38px;}
.section-heading>div{max-width:680px;}
.section-heading h2{margin:0;font-size:38px;line-height:1.12;letter-spacing:-.02em;}
.section-heading p:last-child{margin:16px 0 0;color:var(--muted2);font-size:15px;line-height:1.7;}
.section-count{flex:none;color:var(--muted);font:700 12px var(--font-mono);}

.featured-card{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);min-height:460px;overflow:hidden;border:1px solid var(--border-strong);border-radius:var(--radius);background:var(--panel);box-shadow:0 18px 54px rgba(0,0,0,.22);}
.featured-media{position:relative;min-height:360px;overflow:hidden;}
.featured-media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 48%,rgba(29,32,38,.72) 100%);}
.featured-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.82) contrast(1.02);}
.featured-copy{position:relative;display:flex;flex-direction:column;align-items:flex-start;padding:44px;}
.featured-copy::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:linear-gradient(var(--amber),var(--green));}
.post-meta{display:flex;flex-wrap:wrap;gap:8px 16px;margin:0 0 22px;color:var(--muted);font:700 11px var(--font-mono);text-transform:uppercase;}
.post-meta span+span{position:relative;}
.post-meta span+span::before{content:"";position:absolute;top:50%;left:-9px;width:3px;height:3px;border-radius:50%;background:var(--muted);transform:translateY(-50%);}
.featured-copy h2{margin:0;font-size:34px;line-height:1.16;letter-spacing:-.02em;}
.featured-copy>p:not(.post-meta):not(.article-category){margin:18px 0 28px;color:var(--muted2);font-size:15px;line-height:1.75;}
.read-link{display:inline-flex;align-items:center;gap:10px;margin-top:auto;color:var(--green);font-size:14px;font-weight:800;text-decoration:none;}
.read-link:hover,.read-link:focus-visible{text-decoration:underline;text-underline-offset:4px;}

.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;}
.article-card{position:relative;min-height:350px;display:flex;flex-direction:column;align-items:flex-start;padding:30px;overflow:hidden;border:1px solid var(--border);border-radius:var(--radius);background:linear-gradient(180deg,var(--panel),var(--card));transition:border-color .18s ease,transform .18s ease;}
.article-card::before{content:"";position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,var(--green),var(--blue));}
.article-card:nth-child(2)::before{background:linear-gradient(90deg,var(--blue),var(--amber));}
.article-card:nth-child(3)::before{background:linear-gradient(90deg,var(--amber),var(--green));}
.article-card:hover{border-color:var(--border-strong);transform:translateY(-2px);}
.article-card .article-category{color:var(--green);}
.article-card:nth-child(2) .article-category{color:var(--blue);}
.article-card:nth-child(3) .article-category{color:var(--amber);}
.article-card h2,.article-card h3{margin:0;font-size:27px;line-height:1.2;letter-spacing:-.015em;}
.article-card h2 a,.article-card h3 a{text-decoration:none;}
.article-card h2 a::after,.article-card h3 a::after{content:"";position:absolute;inset:0;}
.article-card>p:not(.article-category,.post-meta){margin:16px 0 26px;color:var(--muted2);font-size:14px;line-height:1.75;}
.article-card .post-meta{margin-top:auto;margin-bottom:18px;}
.article-card .read-link{position:relative;z-index:1;margin-top:0;color:var(--blue);}

.tool-cta{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center;padding:42px;border:1px solid var(--border-strong);border-radius:var(--radius);background:linear-gradient(135deg,#1d2026,#181d1b);}
.tool-cta h2{margin:0;font-size:34px;line-height:1.15;}
.tool-cta p{margin:16px 0 0;color:var(--muted2);font-size:15px;line-height:1.7;}
.tool-actions{display:grid;gap:10px;}
.button{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:52px;padding:0 18px;border:1px solid var(--border-strong);border-radius:var(--radius);background:var(--card2);font-size:14px;font-weight:800;text-decoration:none;}
.button-primary{border-color:var(--amber);background:var(--amber);color:#101112;box-shadow:0 10px 24px rgba(238,178,74,.18);}
.button:hover,.button:focus-visible{border-color:var(--text);}
.button-primary:hover,.button-primary:focus-visible{border-color:var(--amber-soft);background:var(--amber-soft);}

.site-footer{display:flex;justify-content:space-between;align-items:center;gap:28px;padding:32px max(20px,calc((100vw - 1040px)/2));background:#0b0d0e;border-top:1px solid var(--border);color:var(--muted2);}
.site-footer>div{display:flex;flex-direction:column;gap:6px;font-size:12px;}
.site-footer nav{display:flex;align-items:center;flex-wrap:wrap;gap:18px;font-size:12px;}
.site-footer a{color:var(--muted2);}

/* Article pages */
.article-header{border-bottom:1px solid var(--border);background:linear-gradient(145deg,#111315,#191c20);}
.article-header-inner{padding-block:56px 64px;}
.breadcrumb{margin:0 0 42px;color:var(--muted);font-size:12px;}
.breadcrumb a{color:var(--blue);}
.article-heading{max-width:890px;}
.article-heading h1{max-width:850px;margin:0;font-size:clamp(40px,6vw,62px);line-height:1.06;letter-spacing:-.035em;}
.article-deck{max-width:760px;margin:24px 0 26px;color:var(--muted2);font-size:19px;line-height:1.65;}
.article-byline{display:flex;flex-wrap:wrap;gap:9px 22px;margin:0;color:var(--muted);font:700 11px var(--font-mono);text-transform:uppercase;}
.article-byline span+span{position:relative;}
.article-byline span+span::before{content:"";position:absolute;top:50%;left:-13px;width:4px;height:4px;border-radius:50%;background:var(--amber);transform:translateY(-50%);}

.article-layout{display:grid;grid-template-columns:230px minmax(0,730px);gap:70px;align-items:start;padding-block:64px 88px;}
.article-toc{position:sticky;top:96px;padding:20px 0;border-block:1px solid var(--border);}
.toc-label{margin:0 0 14px;color:var(--muted);font:700 11px var(--font-mono);text-transform:uppercase;}
.article-toc ol{list-style:none;margin:0;padding:0;counter-reset:toc;}
.article-toc li{counter-increment:toc;}
.article-toc a{display:grid;grid-template-columns:24px 1fr;gap:6px;padding:7px 0;color:var(--muted2);font-size:12px;line-height:1.45;text-decoration:none;}
.article-toc a::before{content:"0" counter(toc);color:var(--amber);font:700 10px var(--font-mono);}
.article-toc a:hover,.article-toc a:focus-visible{color:var(--text);}
.article-body{min-width:0;color:#d1d5da;font-size:17px;line-height:1.82;}
.article-body>p:first-child{margin-top:0;font-size:19px;color:var(--text);}
.article-body h2{scroll-margin-top:92px;margin:58px 0 18px;color:var(--text);font-size:30px;line-height:1.2;letter-spacing:-.015em;}
.article-body h3{scroll-margin-top:92px;margin:34px 0 12px;color:var(--text);font-size:20px;line-height:1.3;}
.article-body p{margin:0 0 20px;}
.article-body ul,.article-body ol{margin:0 0 24px;padding-left:24px;}
.article-body li{margin-bottom:9px;padding-left:5px;}
.article-body a{color:var(--blue);text-underline-offset:3px;}
.article-body strong{color:var(--text);}
.article-body code{padding:2px 5px;border:1px solid var(--border);border-radius:4px;background:var(--card);color:var(--amber);font: .88em var(--font-mono);}
.lead-box,.callout,.formula-card,.article-example{margin:30px 0;padding:24px;border:1px solid var(--border-strong);border-radius:var(--radius);background:var(--card);}
.lead-box{border-left:3px solid var(--green);}
.callout{border-left:3px solid var(--amber);}
.callout.warning{border-left-color:var(--blue);}
.box-label{display:block;margin:0 0 10px;color:var(--amber);font:800 11px var(--font-mono);letter-spacing:.05em;text-transform:uppercase;}
.lead-box .box-label{color:var(--green);}
.callout.warning .box-label{color:var(--blue);}
.lead-box p:last-child,.callout p:last-child,.article-example p:last-child{margin-bottom:0;}
.formula-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center;background:linear-gradient(135deg,var(--panel),var(--card));}
.formula-card p{margin:0;color:var(--muted2);font-size:14px;}
.formula{padding:16px 18px;border:1px solid rgba(238,178,74,.28);border-radius:6px;background:#111315;color:var(--amber);font:700 16px/1.45 var(--font-mono);text-align:center;white-space:nowrap;}
.article-example{position:relative;padding-top:46px;}
.article-example::before{content:"Esempio";position:absolute;top:0;left:0;padding:7px 12px;border-radius:7px 0 7px 0;background:var(--blue);color:#0d1418;font:800 10px var(--font-mono);text-transform:uppercase;}
.number-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:26px 0;}
.number-flow>div{padding:18px 14px;border:1px solid var(--border);border-radius:6px;background:#131516;}
.number-flow span{display:block;margin-bottom:7px;color:var(--muted);font:700 10px var(--font-mono);text-transform:uppercase;}
.number-flow strong{display:block;color:var(--text);font-size:20px;}
.comparison-table{width:100%;margin:28px 0;border-collapse:collapse;font-size:14px;}
.comparison-table th,.comparison-table td{padding:13px 14px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top;}
.comparison-table th{color:var(--muted);font:700 10px var(--font-mono);letter-spacing:.04em;text-transform:uppercase;}
.comparison-table td:first-child{color:var(--text);font-weight:700;}
.article-cta{margin:52px 0;padding:30px;border:1px solid rgba(52,199,143,.3);border-radius:var(--radius);background:linear-gradient(135deg,rgba(52,199,143,.08),var(--card));}
.article-cta h2{margin:0 0 12px;font-size:24px;}
.article-cta p{margin-bottom:20px;color:var(--muted2);font-size:15px;}
.article-cta .button{display:inline-flex;min-height:46px;width:auto;color:#101112;text-decoration:none;}
.sources-block{margin-top:58px;padding-top:30px;border-top:1px solid var(--border-strong);}
.sources-block h2{margin-top:0;font-size:24px;}
.sources-block li{font-size:14px;color:var(--muted2);}
.editorial-note{margin-top:30px;padding:18px;border:1px solid var(--border);border-radius:var(--radius);color:var(--muted2);font-size:13px;line-height:1.65;}

.related-section{padding-block:70px;border-top:1px solid var(--border);background:var(--card);}
.related-section .section-heading{margin-bottom:30px;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;}
.related-card{position:relative;min-height:210px;padding:26px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);}
.related-card p{margin:0 0 16px;color:var(--green);font:800 11px var(--font-mono);text-transform:uppercase;}
.related-card h2,.related-card h3{margin:0;font-size:22px;line-height:1.25;}
.related-card a{text-decoration:none;}
.related-card a::after{content:"";position:absolute;inset:0;}

@media(max-width:860px){
  .blog-hero-inner{grid-template-columns:1fr;gap:42px;padding-block:78px 70px;}
  .hero-note{max-width:600px;}
  .featured-card{grid-template-columns:1fr;}
  .featured-media{min-height:310px;}
  .featured-media::after{background:linear-gradient(0deg,rgba(29,32,38,.55),transparent 45%);}
  .featured-copy::before{inset:0 0 auto;width:auto;height:3px;background:linear-gradient(90deg,var(--amber),var(--green));}
  .tool-cta{grid-template-columns:1fr;gap:30px;}
  .article-layout{grid-template-columns:1fr;gap:32px;}
  .article-toc{position:static;}
  .article-toc ol{columns:2;column-gap:28px;}
}
@media(max-width:680px){
  .site-header{min-height:66px;padding:12px 14px;}
  .site-nav{gap:15px;font-size:12px;}
  .site-nav .nav-desktop{display:none;}
  .nav-tools-mobile{display:inline;}
  .shell{width:min(100% - 32px,1080px);}
  .blog-hero-inner{padding-block:64px 58px;}
  .blog-hero h1{font-size:42px;}
  .blog-hero-copy{font-size:16px;}
  .blog-section{padding-block:62px;}
  .section-heading{display:block;margin-bottom:30px;}
  .section-heading h2{font-size:31px;}
  .section-count{display:block;margin-top:18px;}
  .featured-media{min-height:230px;}
  .featured-copy{padding:28px 24px;}
  .featured-copy h2{font-size:28px;}
  .article-grid,.related-grid{grid-template-columns:1fr;}
  .article-card{min-height:310px;padding:26px 24px;}
  .tool-cta{padding:28px 24px;}
  .tool-cta h2{font-size:29px;}
  .site-footer{padding:28px 14px;align-items:flex-start;flex-direction:column;}
  .article-header-inner{padding-block:38px 48px;}
  .breadcrumb{margin-bottom:32px;}
  .article-heading h1{font-size:39px;}
  .article-deck{font-size:17px;}
  .article-byline{gap:8px 12px;}
  .article-byline span+span::before{content:"•";position:static;display:inline-block;width:auto;height:auto;margin-right:8px;background:none;color:var(--amber);transform:none;}
  .article-layout{padding-block:42px 68px;}
  .article-toc ol{columns:1;}
  .article-body{font-size:16px;line-height:1.78;}
  .article-body>p:first-child{font-size:18px;}
  .article-body h2{margin-top:48px;font-size:27px;}
  .formula-card{grid-template-columns:1fr;}
  .formula{white-space:normal;}
  .number-flow{grid-template-columns:1fr;}
  .comparison-table{display:block;overflow-x:auto;}
}
@media(max-width:390px){
  .site-nav{gap:12px;font-size:11px;}
  .blog-hero h1{font-size:37px;}
  .article-heading h1{font-size:35px;}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}.article-card{transition:none;}}
@media print{
  body{background:#fff;color:#111;}
  .site-header,.site-footer,.article-toc,.related-section,.article-cta,.skip-link{display:none;}
  .article-header{background:#fff;border:0;}
  .article-layout{display:block;padding-top:20px;}
  .article-body,.article-body p,.article-body li{color:#222;}
  .article-body h2,.article-body h3,.article-heading h1,.article-body strong{color:#111;}
  .lead-box,.callout,.formula-card,.article-example{background:#fff;border-color:#bbb;break-inside:avoid;}
  a{color:#111;text-decoration:underline;}
}