/* =========================================================
   Impronta Enologica — foglio di stile globale
   Contiene le regole condivise dalle pagine interne del sito
   (assistenza, come-lavoriamo, compliance-registri,
    consulenza-enologica, genio, laboratorio-analisi, privacy,
    protocolli). La pagina index.html mantiene il proprio
    sistema dedicato. Le regole specifiche di pagina (varianti
    di hero, btn-dark, display-hero, data-reveal, ecc.)
    restano nei singoli <style> di pagina e fanno override.
   ========================================================= */

/* ----- Variabili globali ----- */
:root{
  --bg:#F7F4ED; --bg-warm:#EFEAE0; --ink:#1C1A16; --ink-soft:#3D3A33;
  --muted:#8A867E; --line:#D9D3C4; --fuchsia:#C8175C; --accent:#5E6B4F;
}

/* ----- Reset / base ----- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;font-weight:400;overflow-x:hidden;margin:0}

/* ----- Helper tipografici / utility ----- */
.serif{font-family:'Cormorant Garamond',serif;font-weight:400}
.serif-italic{font-family:'Cormorant Garamond',serif;font-style:italic;font-weight:400}
.mono{font-family:'DM Mono',monospace}
.text-ink{color:var(--ink)}
.text-muted{color:var(--muted)}
.text-ink-soft{color:var(--ink-soft)}
.text-fuchsia-b{color:var(--fuchsia)}
.bg-warm{background:var(--bg-warm)}
.bg-ink{background:var(--ink)}
.border-line{border-color:var(--line)}
.eyebrow{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}

/* ----- Nav fissa ----- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(247,244,237,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}

/* ----- Nav: hamburger mobile ----- */
.nav-toggle{display:none;background:transparent;border:0;margin:0;padding:10px;cursor:pointer;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;color:var(--ink)}
.nav-toggle span{display:block;width:24px;height:2px;background:currentColor;border-radius:1px;flex-shrink:0;transition:transform .3s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  header.nav > div > nav{
    display:flex !important;
    position:fixed;left:0;right:0;top:76px;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg);
    border-bottom:1px solid var(--line);
    padding:6px 24px 22px;
    transform:translateY(-130%);
    transition:transform .4s cubic-bezier(.6,0,.2,1);
    z-index:49;
    pointer-events:none;
    max-height:calc(100vh - 76px);
    overflow-y:auto;
  }
  header.nav > div > nav.is-open{transform:translateY(0);pointer-events:auto}
  header.nav > div > nav a{padding:16px 0;border-bottom:1px solid var(--line);font-size:13px}
  header.nav > div > nav a:last-child{border-bottom:0}
}

/* ----- Underline link animato ----- */
.ulink{position:relative;display:inline-block}
.ulink::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .45s cubic-bezier(.2,.8,.2,1)}
.ulink:hover::after{transform:scaleX(1);transform-origin:left}

/* ----- Footer ----- */
footer{background:var(--ink);color:var(--bg);padding:60px 0 40px}
footer a{color:var(--bg);text-decoration:none;opacity:.7;transition:opacity .3s}
footer a:hover{opacity:1}

/* ----- Scroll progress ----- */
.scroll-progress{position:fixed;top:0;left:0;height:2px;background:var(--fuchsia);z-index:100;transform-origin:left;transform:scaleX(0);transition:transform .1s linear}

/* ----- Sistema "chapters" ----- */
.chapters-wrap{position:relative}
.chapters-nav-bar{position:sticky;top:76px;z-index:40;background:rgba(247,244,237,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding:14px 0;border-bottom:1px solid transparent;transition:border-color .3s}
.chapters-nav-bar.is-stuck{border-bottom-color:var(--line)}
.chapters-nav{display:flex;flex-wrap:wrap;gap:6px;padding:6px;background:var(--bg-warm);border-radius:999px;width:fit-content;border:1px solid var(--line);margin:0 auto}
.chapters-nav a{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.22em;text-transform:uppercase;padding:10px 18px;border-radius:999px;color:var(--ink-soft);text-decoration:none;transition:all .3s}
.chapters-nav a:hover{color:var(--ink)}
.chapters-nav a.active{background:var(--ink);color:var(--bg)}
.chapter{padding:100px 0;border-bottom:1px solid var(--line);position:relative}
.chapter:last-of-type{border-bottom:none}
.chapter-icon{flex-shrink:0;display:block}
.chapter-icon svg,.chapter-icon img{width:100%;height:auto;display:block}
.chapter-title{font-family:'Cormorant Garamond',serif;font-weight:300;font-size:clamp(2.2rem,4.2vw,3.8rem);line-height:1.05;letter-spacing:-.01em;margin:0 0 32px 0}
.chapter-body p{font-size:17px;line-height:1.75;color:var(--ink-soft);margin:0 0 18px 0;max-width:56ch}
.chapter-body p strong{color:var(--ink);font-weight:500}
.chapter-body .lead{font-family:'Cormorant Garamond',serif;font-weight:300;font-size:clamp(1.4rem,2vw,1.8rem);line-height:1.4;color:var(--ink);max-width:40ch;margin-bottom:32px}
@media (max-width:768px){.chapters-nav{display:none}.chapter{padding:60px 0}}

/* ----- Keypoints ----- */
.keypoints{list-style:none;padding:0;margin:32px 0 0 0;border-top:1px solid var(--line)}
.keypoints li{display:flex;align-items:flex-start;gap:24px;padding:24px 0;border-bottom:1px solid var(--line)}
.keypoints .kp-text{color:var(--ink-soft);line-height:1.6;font-size:15px}
.keypoints .kp-text strong{color:var(--ink);font-weight:500}

/* ----- Pullquote ----- */
.pullquote{border-left:2px solid var(--fuchsia);padding:8px 0 8px 32px;margin:48px 0;font-family:'Cormorant Garamond',serif;font-style:italic;font-weight:300;font-size:clamp(1.6rem,2.4vw,2.2rem);line-height:1.3;color:var(--ink);max-width:48ch}

/* ----- Stamp grid ----- */
.stamp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:32px}
.stamp-grid .stamp{padding:28px 20px;border-right:1px solid var(--line);position:relative}
.stamp-grid .stamp:last-child{border-right:none}
.stamp .stamp-num{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.22em;color:var(--fuchsia);margin-bottom:10px}
.stamp .stamp-title{font-family:'Cormorant Garamond',serif;font-size:22px;line-height:1.15;font-weight:400;margin-bottom:10px;color:var(--ink)}
.stamp .stamp-desc{font-size:13px;line-height:1.55;color:var(--ink-soft)}
@media (max-width:900px){.stamp-grid{grid-template-columns:1fr}.stamp-grid .stamp{border-right:none;border-bottom:1px solid var(--line)}.stamp-grid .stamp:last-child{border-bottom:none}}

/* ----- Registri list ----- */
.registri-list{list-style:none;padding:0;margin:32px 0 0 0}
.registri-list li{display:grid;grid-template-columns:64px 1fr auto;gap:20px;padding:18px 0;border-bottom:1px solid var(--line);align-items:baseline}
.registri-list li:first-child{border-top:1px solid var(--line)}
.registri-list .r-name{font-size:15px;color:var(--ink)}
.registri-list .r-name .sub{color:var(--muted);font-size:13px;display:block;margin-top:3px;font-family:'DM Sans',sans-serif}
.registri-list .r-tag{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--fuchsia);white-space:nowrap}
@media (max-width:640px){.registri-list li{grid-template-columns:50px 1fr;gap:14px}.registri-list .r-tag{grid-column:2;padding-top:4px}}

/* ----- Calendar ----- */
.calendar{margin-top:32px;border-top:1px solid var(--line)}
.calendar-row{display:grid;grid-template-columns:140px 1fr;gap:28px;padding:22px 0;border-bottom:1px solid var(--line);align-items:baseline}
.calendar-row .c-body{font-size:15px;line-height:1.55;color:var(--ink-soft)}
.calendar-row .c-body strong{color:var(--ink);font-weight:500;display:block;font-family:'Cormorant Garamond',serif;font-size:22px;font-weight:400;line-height:1.2;margin-bottom:6px}
@media (max-width:640px){.calendar-row{grid-template-columns:1fr;gap:6px}}

/* ----- Partners grid ----- */
.partners-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0;margin-top:40px;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.partners-grid .p-cell{padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.partners-grid .p-title{font-family:'Cormorant Garamond',serif;font-size:22px;line-height:1.15;margin-bottom:10px;color:var(--ink)}
@media (max-width:700px){.partners-grid{grid-template-columns:1fr}}

/* ----- Process steps ----- */
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:32px}
.process .step{padding:28px 20px;border-right:1px solid var(--line);position:relative}
.process .step:last-child{border-right:none}
.process .step-title{font-family:'Cormorant Garamond',serif;font-size:22px;line-height:1.15;font-weight:400;margin-bottom:10px;color:var(--ink)}
.process .step-desc{font-size:13px;line-height:1.55;color:var(--ink-soft)}
@media (max-width:900px){.process{grid-template-columns:repeat(2,1fr)}.process .step:nth-child(2n){border-right:none}.process .step:nth-child(1),.process .step:nth-child(2){border-bottom:1px solid var(--line)}}
@media (max-width:500px){.process{grid-template-columns:1fr}.process .step{border-right:none;border-bottom:1px solid var(--line)}.process .step:last-child{border-bottom:none}}

/* ----- Analytes table ----- */
.analytes-row{display:grid;grid-template-columns:60px 1fr auto;gap:24px;padding:18px 0;border-bottom:1px solid var(--line);align-items:baseline}
.analytes-row .a-name{font-size:15px;color:var(--ink)}
.analytes-row .a-name .sub{color:var(--muted);font-size:13px;display:block;margin-top:3px;font-family:'DM Sans',sans-serif}
.analytes-row .a-meta{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft)}
@media (max-width:640px){.analytes-row{grid-template-columns:50px 1fr;gap:16px}.analytes-row .a-meta{grid-column:2;padding-top:4px}}

/* ----- CTA block ----- */
.cta-block{background:var(--ink);color:var(--bg);padding:80px 48px;margin-top:80px;position:relative;overflow:hidden}
.cta-block::before{content:"";position:absolute;left:-200px;bottom:-200px;width:600px;height:600px;background:radial-gradient(circle,rgba(200,23,92,.2) 0%,transparent 60%);pointer-events:none}