:root{
  --sand:#f6efe3; --sand-2:#ecdfc8; --ochre:#b8642b; --ochre-d:#8f4a1d;
  --water:#1f5f7a; --water-d:#143f52; --ink:#22262a; --muted:#5d6468;
  --line:#e2d6c1; --card:#fffdf9; --max:1100px;
  --serif:"Source Serif 4",Georgia,serif; --sans:"Inter",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--sand);color:var(--ink);font:17px/1.7 var(--sans)}
img{max-width:100%;height:auto;display:block}
a{color:var(--water)}
a:hover{color:var(--ochre-d)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:10}

/* header */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;font:700 1.2rem/1 var(--serif);letter-spacing:.08em;color:var(--water-d);text-decoration:none}
.brand small{display:block;font:500 .72rem/1 var(--sans);letter-spacing:.02em;color:var(--muted);margin-left:8px}
.mark{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--water) 50%,var(--ochre) 50%)}
.menu ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.menu a{display:block;padding:8px 12px;border-radius:6px;text-decoration:none;color:var(--ink);font-size:.95rem;font-weight:500}
.menu a:hover{background:var(--sand)}
.menu a[aria-current]{color:var(--ochre-d);background:var(--sand-2)}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 14px;font:500 .95rem var(--sans);cursor:pointer}

/* hero: rosso con gradiente */
.hero{color:#fff;padding:88px 0 64px;background:#8e1b1b center/cover no-repeat;position:relative}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(110,14,14,.55),rgba(110,14,14,.15) 70%)}
.hero .wrap{position:relative}
.hero h1{font:700 clamp(2rem,5vw,3.2rem)/1.15 var(--serif);margin:0 0 12px;max-width:18ch;text-shadow:0 1px 2px rgba(0,0,0,.2)}
.lead{font-size:1.15rem;max-width:52ch;margin:0;opacity:.95}
.hero-home{background-image:linear-gradient(120deg,#6e0e0e 0%,#b3202a 50%,#e0493a 100%)}
.hero-storia{background-image:linear-gradient(120deg,#6e0e0e,#b3202a 60%,#d8402f)}
.hero-progetti{background-image:linear-gradient(120deg,#6e0e0e,#b3202a 60%,#d8402f)}
.hero-prospettive{background-image:linear-gradient(120deg,#6e0e0e,#b3202a 60%,#d8402f)}
.hero-multimedia{background-image:linear-gradient(120deg,#6e0e0e,#b3202a 60%,#d8402f)}
.hero-bibliografia{background-image:linear-gradient(120deg,#6e0e0e,#b3202a 60%,#d8402f)}
.hero-contatti{background-image:linear-gradient(120deg,#6e0e0e,#b3202a 60%,#d8402f)}

/* immagini */
.banner{margin:0 0 36px;border-radius:10px;overflow:hidden;box-shadow:0 2px 10px rgba(60,20,10,.12)}
.banner img{width:100%;aspect-ratio:1200/371;object-fit:cover}
.side{margin:6px 0 16px;max-width:280px}
.side img{border-radius:8px;box-shadow:0 2px 8px rgba(60,20,10,.12)}
.side.right{float:right;margin-left:24px}
.side.left{float:left;margin-right:24px}
.prose h2,.next,.projects,.compare,.facts,.note,.effects,.checklist{clear:both}
.timeline li{display:flow-root}
blockquote{display:flow-root}

/* content */
.content{padding:32px 20px 72px}
.crumb{font-size:.85rem;color:var(--muted);margin-bottom:24px}
.crumb a{color:var(--muted)}
.prose{max-width:760px}
h2{font:700 1.7rem/1.25 var(--serif);color:var(--water-d);margin:48px 0 14px}
h3{font:600 1.15rem/1.35 var(--serif);margin:0 0 8px}
.prose > h2:first-child,section > h2:first-child{margin-top:8px}
blockquote{margin:28px 0;padding:18px 24px;background:var(--card);border-left:4px solid var(--ochre);font-family:var(--serif);font-size:1.08rem}
blockquote.big{font-size:1.35rem;line-height:1.5;border-left-color:var(--water)}
blockquote cite{display:block;margin-top:10px;font:500 .85rem var(--sans);color:var(--muted);font-style:normal}
.note{background:var(--sand-2);padding:20px 24px;border-radius:8px;margin-top:40px;font-size:.95rem}
.small{font-size:.85rem;color:var(--muted)}

.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px 24px}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0}
.compare .dry{border-top:5px solid var(--ochre)}
.compare .wet{border-top:5px solid var(--water)}
.compare p{margin:0;font-size:.97rem}
.compare strong{font-weight:500}
.facts{list-style:none;padding:0;margin:28px 0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.facts li{border-top:2px solid var(--ink);padding-top:10px}
.facts b{display:block;font:700 2.2rem/1 var(--serif);color:var(--ochre-d)}
.facts span{font-size:.9rem;color:var(--muted)}
.projects{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:32px 0}
.project h2{margin-top:0;font-size:1.4rem;letter-spacing:.06em}
.effects li,.checklist li{margin-bottom:10px}
.btn{display:inline-block;background:var(--ochre);color:#fff;text-decoration:none;border:0;border-radius:8px;padding:12px 22px;font:600 1rem var(--sans);cursor:pointer}
.btn:hover{background:var(--ochre-d);color:#fff}
.next{margin-top:40px}

/* timeline */
.timeline{list-style:none;padding:0;margin:32px 0;border-left:2px solid var(--line)}
.timeline li{position:relative;padding:0 0 12px 28px}
.timeline li::before{content:"";position:absolute;left:-8px;top:8px;width:14px;height:14px;border-radius:50%;background:var(--ochre);border:3px solid var(--sand)}
.year{display:inline-block;font:700 1.3rem var(--serif);color:var(--water-d)}

/* multimedia */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:20px 0 40px}
.video-grid.four{grid-template-columns:repeat(2,1fr)}
.video{margin:0;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.ratio{aspect-ratio:4/3;background:#000}
.ratio iframe{width:100%;height:100%;border:0;display:block}
.video figcaption{padding:12px 14px}
.video figcaption strong{display:block;line-height:1.35}
.video figcaption span{font-size:.85rem;color:var(--muted)}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:18px;margin-top:20px}
.shot{margin:0;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px}
.shot img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:6px;background:var(--sand-2)}
.shot figcaption{font-size:.85rem;padding-top:8px;line-height:1.4}

/* bibliografia */
.filters{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:8px;font-size:.9rem}
.filters button{border:1px solid var(--line);background:var(--card);border-radius:20px;padding:6px 14px;font:500 .88rem var(--sans);cursor:pointer}
.filters button.on{background:var(--water);color:#fff;border-color:var(--water)}
.bib-list{list-style:none;padding:0;margin:16px 0 0}
.bib{display:grid;grid-template-columns:42px 1fr auto;gap:14px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
.bib[hidden]{display:none}
.lang{font:600 .72rem var(--sans);letter-spacing:.06em;text-align:center;padding:4px 0;border-radius:4px;background:var(--sand-2);color:var(--ochre-d)}
.bib h3{font:500 1rem/1.4 var(--sans);margin:0}
.bib h3 a{color:var(--ink);text-decoration:none}
.bib h3 a:hover{color:var(--water);text-decoration:underline}
.bib p{margin:2px 0 0;font-size:.85rem;color:var(--muted)}
.bib time{margin-left:6px}
.dl{white-space:nowrap;font-size:.85rem;font-weight:600;text-decoration:none;border:1px solid var(--water);border-radius:6px;padding:6px 12px}
.dl:hover{background:var(--water);color:#fff}

/* contatti */
.contact{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:start}
.form{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:28px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:500;font-size:.92rem;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;font:inherit;font-size:1rem;padding:10px 12px;border:1px solid #cdbfa6;border-radius:8px;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--water);border-color:var(--water)}
.check{display:flex;gap:10px;align-items:flex-start}
.check input{width:auto;margin-top:5px}
.check label{font-weight:400;font-size:.85rem;line-height:1.5}
.hp{position:absolute;left:-9999px}
.alert{padding:14px 18px;border-radius:8px;margin-top:16px}
.alert.ok{background:#e3f1e6;color:#1d5a2c}
.alert.ko{background:#f8e3df;color:#8a2a17}
.form-error{color:#8a2a17;font-size:.9rem}

/* footer */
.site-footer{background:var(--water-d);color:#dce8ec;padding:36px 0;font-size:.92rem}
.site-footer a{color:#fff}
.foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.motto{margin:0;text-align:right;font-family:var(--serif)}
.motto span{font:400 .8rem var(--sans);opacity:.8}

@media (max-width:900px){
  .menu-toggle{display:block}
  .menu{position:absolute;top:68px;left:0;right:0;background:var(--card);border-bottom:1px solid var(--line);display:none}
  .menu.open{display:block}
  .menu ul{flex-direction:column;padding:8px 16px 16px}
  .video-grid,.video-grid.four{grid-template-columns:1fr 1fr}
  .contact{grid-template-columns:1fr}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .brand small{display:none}
  .hero{padding:56px 0 40px}
  .side,.side.left,.side.right{float:none;max-width:100%;margin:8px 0 20px}
  .side img{width:100%}
  .compare,.projects,.facts,.video-grid,.video-grid.four{grid-template-columns:1fr}
  .bib{grid-template-columns:36px 1fr}
  .bib .dl{grid-column:2;justify-self:start}
  .motto{text-align:left}
}