/* ============================================================
   Stratigram — foglio di stile di produzione
   Base: stratigram_mockup_v5.html
   Integra: docs/design-review.md, docs/seo-strategy.md
   ============================================================ */

/* ---------- 1. Token ---------- */

:root{
  color-scheme: light;

  /* colore, palette originale */
  --mist:#F4F3F7; --paper:#FBFAFC; --white:#FFFFFF;
  --graphite:#25242B; --ink:#25263A;
  --blue:#7186C7; --violet:#A395C7; --rose:#C98F91; --glacier:#B8D5D2;
  --fog:#E5E3EA;

  /* colore, correzioni di contrasto (design-review §2.1) */
  --muted:#6C6975;          /* era #777481, sotto soglia su ogni fondo della pagina */
  --muted-soft:#777481;     /* resta per usi decorativi */
  --blue-strong:#4C67B9;    /* testo piccolo in blu */
  --blue-hover:#4762B4;
  --blue-active:#3F58A4;
  --graphite-hover:#34333C;
  --graphite-active:#15141A;

  /* superfici e bordi */
  --line:rgba(37,36,43,.10);
  --line-strong:rgba(37,36,43,.22);
  --line-focus:rgba(37,36,43,.50);
  --surface-hover:rgba(37,36,43,.035);
  --surface-active:rgba(37,36,43,.06);
  --overlay-light:rgba(255,255,255,.12);

  /* stato */
  --success:#45746B; --error:#B54459; --warning:#84653F; --info:#4C67B9;

  /* messa a fuoco */
  --focus:#3D4C86;
  --focus-width:2px;
  --focus-offset:3px;

  /* tipografia */
  --font-serif:'Instrument Serif', Georgia, 'Times New Roman', serif;
  --font-sans:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --fs-micro:.68rem; --fs-small:.8rem; --fs-body:.91rem; --fs-lead:1.05rem;

  /* spaziatura */
  --s-2:8px; --s-3:12px; --s-4:16px; --s-5:20px; --s-6:24px;
  --s-8:32px; --s-10:40px; --s-12:48px; --s-16:64px; --s-24:96px;

  /* raggi */
  --r-s:10px; --r-m:18px; --r-l:28px; --r-pill:999px;
  --radius:28px;

  /* ombre */
  --shadow-sm:0 8px 24px rgba(37,36,43,.08);
  --shadow-md:0 18px 40px rgba(37,36,43,.08);
  --shadow-lg:0 35px 90px rgba(37,38,58,.12);

  /* movimento */
  --dur-instant:120ms; --dur-fast:180ms; --dur-base:280ms;
  --dur-slow:620ms; --dur-cycle:1100ms;
  --ease-out:cubic-bezier(.16,1,.3,1);
  --ease-in-out:cubic-bezier(.4,0,.2,1);

  /* sovrapposizione */
  --z-base:1; --z-raised:2; --z-overlay:5; --z-nav:30; --z-menu:40; --z-skip:50;

  /* soglie, dichiarate per il codice del menu */
  --bp-sm:620px; --bp-md:900px; --bp-lg:1120px;

  --nav-h:81px;
}

/* anello di messa a fuoco chiaro sulle sezioni scure */
.hero, .story-section, .manifesto, .nav-panel{ --focus:#B8D5D2 }

/* ---------- 2. Base ---------- */

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:var(--mist);
  color:var(--graphite);
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,picture,video{max-width:100%}
.serif{font-family:var(--font-serif);font-weight:400}

::selection{background:var(--glacier);color:var(--graphite)}

section[id], main[id]{scroll-margin-top:calc(var(--nav-h) + var(--s-4))}

:where(a,button,summary,[tabindex]:not([tabindex="-1"])):focus-visible{
  outline:var(--focus-width) solid var(--focus);
  outline-offset:var(--focus-offset);
  border-radius:var(--r-s);
}
:where(.hero-cta,.cta-primary,.button,.store-pill):focus-visible{border-radius:var(--r-pill)}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

.skip{
  position:absolute;left:var(--s-4);top:-100px;z-index:var(--z-skip);
  background:var(--graphite);color:#fff;
  padding:var(--s-3) var(--s-5);border-radius:var(--r-pill);
  font-size:var(--fs-small);
  transition:top var(--dur-fast) var(--ease-out);
}
.skip:focus{top:var(--s-4)}

/* ---------- 3. Barra di navigazione ---------- */

nav{
  position:fixed;inset:0 0 auto 0;z-index:var(--z-nav);
  display:flex;align-items:center;justify-content:space-between;
  gap:var(--s-6);
  padding:var(--s-6) var(--s-12);
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--dur-base) var(--ease-in-out),
             border-color var(--dur-base) var(--ease-in-out),
             backdrop-filter var(--dur-base) var(--ease-in-out);
}
nav[data-tema="chiaro"]{
  background:rgba(244,243,247,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}

.logo{
  font-family:var(--font-serif);font-size:1.55rem;letter-spacing:.04em;
  color:#fff;transition:color var(--dur-base) var(--ease-in-out);
  flex:0 0 auto;
}
nav[data-tema="chiaro"] .logo{color:var(--graphite)}

.nav-links{display:flex;gap:var(--s-8);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase}
.nav-links a{
  color:rgba(255,255,255,.75);
  transition:color var(--dur-fast) var(--ease-out);
}
.nav-links a:hover{color:#fff}
nav[data-tema="chiaro"] .nav-links a{color:var(--muted)}
nav[data-tema="chiaro"] .nav-links a:hover{color:var(--graphite)}

.nav-cta{
  flex:0 0 auto;
  font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  padding:.6rem 1.1rem;border-radius:var(--r-pill);
  background:#fff;color:var(--ink);
  transition:background var(--dur-fast) var(--ease-out),transform var(--dur-fast) var(--ease-out);
}
.nav-cta:hover{transform:translateY(-1px)}
nav[data-tema="chiaro"] .nav-cta{background:var(--graphite);color:#fff}
nav[data-tema="chiaro"] .nav-cta:hover{background:var(--graphite-hover)}

/* comando del menu, visibile solo sotto 900px */
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  flex-direction:column;gap:6px;
  background:none;border:0;cursor:pointer;color:#fff;
  transition:color var(--dur-base) var(--ease-in-out);
}
nav[data-tema="chiaro"] .nav-toggle{color:var(--graphite)}
.nav-toggle-line{
  display:block;width:20px;height:1px;background:currentColor;
  transition:transform var(--dur-base) var(--ease-out),opacity var(--dur-fast) var(--ease-out);
}
/* nth-of-type e non last-of-type: l'ultimo span del pulsante è l'etichetta
   per i lettori di schermo, non la seconda linea */
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-of-type(1){transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-of-type(2){transform:translateY(-3.5px) rotate(-45deg)}

.nav-panel{
  position:fixed;inset:0;z-index:var(--z-menu);
  background:var(--paper);color:var(--graphite);
  padding:calc(var(--nav-h) + var(--s-8)) var(--s-5) var(--s-8);
  display:flex;flex-direction:column;
  opacity:0;transform:translateY(-8px);
  transition:opacity var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out);
}
.nav-panel[hidden]{display:none}
.nav-panel.is-open{opacity:1;transform:none}
.nav-panel-list{list-style:none;display:flex;flex-direction:column}
.nav-panel-list a{
  display:flex;align-items:center;min-height:56px;
  font-family:var(--font-serif);font-size:1.8rem;
  border-top:1px solid var(--line);
}
.nav-panel-list li:last-child a{border-bottom:1px solid var(--line)}
.nav-panel .button{margin-top:var(--s-8);align-self:flex-start}
body.is-locked{overflow:hidden}

/* con il pannello aperto la barra resta sopra, altrimenti il comando di
   chiusura finisce sotto al pannello e diventa irraggiungibile */
body.is-locked nav{z-index:calc(var(--z-menu) + 1)}
body.is-locked .logo,
body.is-locked .nav-toggle{color:var(--graphite)}

/* ---------- 4. Hero ---------- */

.hero{
  min-height:100vh;position:relative;display:grid;place-items:center;
  background:var(--ink);color:#fff;overflow:hidden;text-align:center;
}
.hero-video{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.72;filter:saturate(.7) contrast(.95);
}
.hero:after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 50% 40%,rgba(37,38,58,.12),rgba(37,38,58,.38) 52%,rgba(17,18,30,.78) 100%);
}
.hero-content{position:relative;z-index:3;max-width:890px;padding:7rem var(--s-8) var(--s-16)}

.word-cycle{
  position:absolute;z-index:2;left:50%;top:45%;
  transform:translate(-50%,-50%) scale(1);
  width:100%;padding:0 2vw;text-align:center;white-space:nowrap;
  overflow:visible;pointer-events:none;user-select:none;
  font-family:var(--font-serif);font-style:italic;
  font-size:clamp(6.5rem,16vw,15rem);font-weight:400;line-height:.78;letter-spacing:-.025em;
  color:rgba(255,255,255,.025);
  -webkit-text-stroke:1.15px rgba(255,255,255,.24);
  text-shadow:0 0 32px rgba(184,213,210,.06);
  opacity:1;filter:blur(0);
  transition:opacity var(--dur-cycle) ease,filter var(--dur-cycle) ease,transform var(--dur-cycle) ease;
}
.word-cycle.is-fading{opacity:0;filter:blur(8px);transform:translate(-50%,-50%) scale(1.018)}

.hero h1{
  position:relative;z-index:2;font-family:var(--font-serif);
  font-size:clamp(3.2rem,8vw,6.5rem);line-height:.92;font-weight:400;
  margin:1.2rem auto 1.4rem;max-width:860px;
  text-shadow:0 2px 24px rgba(10,11,20,.18);
}
.hero p{font-size:1rem;line-height:1.7;color:rgba(255,255,255,.72);max-width:610px;margin:auto}

.hero-actions{
  display:flex;flex-wrap:wrap;gap:var(--s-4);
  justify-content:center;align-items:center;margin-top:var(--s-8);
}
.cta-primary{
  display:inline-flex;align-items:center;
  padding:var(--s-3) var(--s-6);
  background:#fff;color:var(--ink);
  border-radius:var(--r-pill);
  font-size:var(--fs-small);letter-spacing:.08em;font-weight:500;
  transition:transform var(--dur-fast) var(--ease-out),background var(--dur-fast) var(--ease-out);
}
.cta-primary:hover{transform:translateY(-2px);background:#F2F1F6}
.hero-cta{
  display:inline-flex;align-items:center;
  padding:.9rem 1.25rem;
  border:1px solid rgba(255,255,255,.45);
  border-radius:var(--r-pill);
  font-size:var(--fs-small);letter-spacing:.08em;
  transition:background var(--dur-fast) var(--ease-out),border-color var(--dur-fast) var(--ease-out);
}
.hero-cta:hover{background:var(--overlay-light);border-color:rgba(255,255,255,.7)}

/* ---------- 5. Impianto delle sezioni ---------- */

.section{padding:var(--s-24) var(--s-12)}
.wrap{max-width:1180px;margin:auto}
.eyebrow{
  font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--blue-strong);margin-bottom:var(--s-4);
}
.headline{
  font-family:var(--font-serif);font-weight:400;
  font-size:clamp(2.5rem,5vw,4.7rem);line-height:1.02;max-width:900px;
}
.lead{margin-top:1.4rem;max-width:720px;color:var(--muted);font-size:var(--fs-lead);line-height:1.8}
.intro{background:var(--paper)}

/* comparsa a scorrimento: senza JavaScript il contenuto resta visibile */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity var(--dur-slow) var(--ease-out),transform var(--dur-slow) var(--ease-out)}
.js .reveal.is-in{opacity:1;transform:none}

/* ---------- 6. Flusso ---------- */

.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s-4);margin-top:var(--s-16)}
.flow-card{
  min-height:500px;border:1px solid var(--line);border-radius:var(--radius);
  position:relative;overflow:hidden;background:#fff;display:flex;flex-direction:column;
  transition:border-color var(--dur-fast) var(--ease-out),box-shadow var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out);
}
.flow-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-md);transform:translateY(-3px)}
.flow-photo{height:52%;min-height:235px;position:relative;overflow:hidden}
.flow-photo picture,.flow-photo img{display:block;width:100%;height:100%;object-fit:cover}
.flow-photo:after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,20,28,.02),rgba(20,20,28,.18));
}
.flow-copy{padding:1.55rem 1.7rem 1.8rem;position:relative;flex:1;background:rgba(251,250,252,.96)}
.n{font-family:var(--font-serif);font-size:2rem;color:var(--blue-strong);position:absolute;right:1.7rem;top:1.45rem}
.flow-card h3{font-family:var(--font-serif);font-size:1.8rem;font-weight:400;margin:.15rem 3rem .7rem 0}
.flow-card p{color:var(--muted);line-height:1.65;font-size:var(--fs-body)}

/* ---------- 7. Dimostrazione ---------- */

.demo{background:linear-gradient(180deg,var(--mist),#EEEFF5)}
.demo-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:var(--s-16);align-items:center}
.phone{
  width:min(360px,85vw);aspect-ratio:9/19;margin:auto;background:#fff;
  border:1px solid var(--line);border-radius:48px;padding:18px;box-shadow:var(--shadow-lg);
}
.screen{
  height:100%;border-radius:34px;
  background:linear-gradient(160deg,#F8F8FB,#F0EFF6);
  padding:var(--s-6);display:flex;flex-direction:column;
}
.status{font-size:.72rem;display:flex;justify-content:space-between;opacity:.75}
.screen-title{font-family:var(--font-serif);font-size:2.1rem;margin-top:4.2rem}
.screen-sub{font-size:.86rem;color:var(--muted);line-height:1.5;margin-top:.6rem}
.capture{margin-top:auto;border:1px solid var(--line);background:#fff;border-radius:26px;padding:var(--s-4)}
.wave{height:46px;display:flex;align-items:center;gap:4px}
.wave i{display:block;width:3px;background:var(--blue);border-radius:5px;animation:wave 1.2s ease-in-out infinite}
.wave i:nth-child(2n){animation-delay:.15s}
.wave i:nth-child(3n){animation-delay:.28s}
@keyframes wave{0%,100%{height:10px}50%{height:38px}}
.capture small{color:var(--muted)}

/* ---------- 8. Thought Stories ---------- */

.story-section{background:var(--ink);color:#fff;overflow:hidden}
.story-section .eyebrow{color:var(--glacier)}
.story-section .lead{color:rgba(255,255,255,.72)}
.story-demo{display:grid;grid-template-columns:.82fr 1.18fr;gap:var(--s-16);align-items:center;margin-top:var(--s-16)}
/* senza questo gli elementi della griglia si allargano al contenuto e la lista
   orizzontale delle storie esce dallo schermo invece di scorrere */
.story-demo>*{min-width:0}
.story-phone{
  width:min(350px,82vw);aspect-ratio:9/18.7;margin:auto;
  border-radius:48px;padding:12px;background:#11121b;
  box-shadow:0 42px 110px rgba(0,0,0,.35);transform:rotate(-1.2deg);
}
.story-screen{
  height:100%;border-radius:38px;overflow:hidden;position:relative;
  background:linear-gradient(155deg,#798dd0 0%,#8f86bc 48%,#c58e9d 100%);
  padding:1.25rem;display:flex;flex-direction:column;
}
/* velatura che rende leggibile il testo sul gradiente (design-review §2.1 D-G) */
.story-screen:after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 10%,rgba(17,18,27,.55) 78%);
  border-radius:inherit;pointer-events:none;z-index:1;
}
.story-progress{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;position:relative;z-index:2}
.story-progress i{height:2px;border-radius:3px;background:rgba(255,255,255,.4)}
.story-progress i:first-child{background:#fff}
.story-ui-top{
  display:flex;justify-content:space-between;align-items:center;margin-top:.85rem;
  font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;
  color:rgba(255,255,255,.85);position:relative;z-index:2;
}
.story-orbit{position:absolute;width:260px;height:260px;border:1px solid rgba(255,255,255,.25);border-radius:50%;right:-75px;top:25%;transform:rotate(18deg)}
.story-orbit:before,.story-orbit:after{content:"";position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.18)}
.story-orbit:before{inset:24px}
.story-orbit:after{inset:55px}
.story-dot{position:absolute;width:12px;height:12px;border-radius:50%;background:#fff;box-shadow:0 0 25px rgba(255,255,255,.65);right:57px;top:43%}

.story-main{margin-top:auto;position:relative;z-index:2;padding-bottom:1.5rem}
.story-kicker{font-size:.68rem;letter-spacing:.15em;text-transform:uppercase;color:rgba(255,255,255,.85)}
.story-title{font-family:var(--font-serif);font-weight:400;font-size:2.35rem;line-height:1.02;margin:.75rem 0 1rem}
.story-main p{font-size:.86rem;line-height:1.55;color:rgba(255,255,255,.82)}
.chips{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:1rem}
.chip{font-size:.67rem;border:1px solid rgba(255,255,255,.45);border-radius:var(--r-pill);padding:.35rem .6rem;background:rgba(255,255,255,.07)}
.story-action{
  margin-top:1.15rem;display:flex;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.18);padding-top:1rem;font-size:.75rem;
  position:relative;z-index:2;
}
.story-action b{font-weight:500}

.story-side{display:grid;gap:var(--s-4)}
.story-explain{
  border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);
  padding:1.5rem;background:rgba(255,255,255,.045);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.story-explain small{display:block;color:var(--glacier);text-transform:uppercase;letter-spacing:.13em;font-size:.65rem;margin-bottom:.65rem}
.story-explain h3{font-family:var(--font-serif);font-size:1.65rem;font-weight:400;margin-bottom:.45rem}
.story-explain p{font-size:.84rem;line-height:1.55;color:rgba(255,255,255,.72)}
.story-dots{display:none}

/* ---------- 9. Gli strati ---------- */

.connection{background:var(--paper);overflow:hidden}
.depth-stage{
  margin-top:var(--s-16);min-height:690px;border-radius:40px;
  background:linear-gradient(180deg,#fbfbfd 0%,#f1f0f6 100%);
  border:1px solid var(--line);position:relative;overflow:hidden;
}
.depth-stage:after{
  content:"";position:absolute;left:50%;bottom:7%;width:48%;height:10%;
  transform:translateX(-50%);
  background:radial-gradient(ellipse,rgba(37,38,58,.16),transparent 70%);filter:blur(20px);
}
.depth-map{position:absolute;left:50%;top:50%;width:min(560px,70%);height:540px;transform:translate(-50%,-48%);z-index:2}
.strata-axis{position:absolute;left:50%;top:7%;bottom:7%;width:1px;background:linear-gradient(transparent,rgba(37,36,43,.18) 15%,rgba(37,36,43,.18) 85%,transparent);transform:translateX(-50%)}
.stratum{
  position:absolute;left:50%;width:76%;height:88px;border-radius:50%;
  transform:translateX(-50%);border:1px solid rgba(255,255,255,.68);
  box-shadow:0 18px 40px rgba(37,36,43,.08),inset 0 1px 0 rgba(255,255,255,.72);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.stratum:after{content:"";position:absolute;left:50%;top:50%;width:74%;height:56%;border-radius:50%;transform:translate(-50%,-50%);border:1px solid rgba(255,255,255,.34)}
.s1{top:6%;background:rgba(113,134,199,.56);width:72%}
.s2{top:20%;background:rgba(125,144,205,.43);width:78%}
.s3{top:34%;background:rgba(163,149,199,.47);width:82%}
.s4{top:48%;background:rgba(188,151,190,.44);width:78%}
.s5{top:62%;background:rgba(184,213,210,.52);width:84%}
.s6{top:76%;background:rgba(125,184,174,.52);width:72%}
.strata-dot{position:absolute;width:12px;height:12px;border-radius:50%;background:#fff;box-shadow:0 3px 12px rgba(37,36,43,.18);z-index:4}
.strata-dot.blue{background:#7186c7}
.strata-dot.violet{background:#a395c7}
.strata-dot.rose{background:#c98f91}
.strata-dot.green{background:#83b5ac}
.sd1{left:48%;top:10%}.sd2{left:31%;top:18%}.sd3{right:27%;top:27%}.sd4{left:42%;top:39%}
.sd5{right:34%;top:51%}.sd6{left:27%;top:64%}.sd7{right:25%;top:72%}.sd8{left:47%;top:82%}

/* legenda: ancorata al bordo della mappa, non più a un offset percentuale */
.strata-legend{
  position:absolute;left:50%;top:50%;
  width:min(560px,70%);height:540px;
  transform:translate(-50%,-48%);
  z-index:3;pointer-events:none;
}
.strata-label{position:absolute;right:calc(100% + var(--s-6));width:150px;font-size:.72rem;line-height:1.35;color:var(--muted)}
.strata-label b{display:block;color:var(--graphite);font-weight:500;margin-bottom:.15rem}
.sl1{top:8%}.sl2{top:29%}.sl3{top:50%}.sl4{top:72%}

.strata-key{
  position:absolute;z-index:5;padding:.52rem .72rem;border-radius:var(--r-pill);
  background:rgba(255,255,255,.9);border:1px solid rgba(37,36,43,.08);
  box-shadow:var(--shadow-sm);font-size:.68rem;white-space:nowrap;
  transform:translate(-50%,-50%);
}
.sk1{left:53%;top:8%}.sk2{left:18%;top:34%}.sk3{left:91%;top:49%}.sk4{left:50%;top:68%}.sk5{left:79%;top:78%}

/* a destra e non a sinistra: la colonna sinistra è occupata dalle etichette
   degli strati, e la didascalia copriva l'ultima, «Radici» */
.depth-caption{
  position:absolute;right:var(--s-8);bottom:var(--s-8);z-index:var(--z-overlay);
  width:min(340px,28%);background:rgba(255,255,255,.84);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.85);border-radius:var(--s-6);padding:1.35rem;
}
.depth-caption span{font-size:.65rem;letter-spacing:.14em;text-transform:uppercase;color:var(--blue-strong)}
.depth-caption .depth-title{font-family:var(--font-serif);font-weight:400;font-size:1.8rem;margin:.55rem 0}
.depth-caption p{font-size:.82rem;line-height:1.55;color:var(--muted)}
.depth-hint{position:absolute;left:var(--s-8);top:var(--s-8);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);z-index:var(--z-overlay)}

/* ---------- 10. Output ---------- */

.export{background:linear-gradient(135deg,#ECEBF3,#F5F4F8)}
.export-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-8);margin-top:var(--s-16)}
.export-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:var(--s-8);min-height:260px;
  transition:border-color var(--dur-fast) var(--ease-out),box-shadow var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out);
}
.export-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-md);transform:translateY(-3px)}
.export-card h3{font-family:var(--font-serif);font-size:2rem;font-weight:400}
.export-card p{color:var(--muted);line-height:1.6;margin-top:.7rem}
.export-list{margin-top:1.4rem;display:grid;gap:.65rem;font-size:.83rem}
.export-list div{padding:.72rem 0;border-top:1px solid var(--line)}

/* ---------- 11. Manifesto ---------- */

.manifesto{background:var(--graphite);color:#fff}
.manifesto .eyebrow{color:var(--glacier)}
.principles{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s-4);margin-top:var(--s-16)}
.principle{padding:1.7rem;border-top:1px solid rgba(255,255,255,.2)}
.principle h3{font-family:var(--font-serif);font-size:1.55rem;font-weight:400}
.principle p{font-size:.83rem;line-height:1.6;color:rgba(255,255,255,.72);margin-top:.7rem}

/* ---------- 12. Domande frequenti ---------- */

.faq{background:var(--paper)}
.faq-list{margin-top:var(--s-16);max-width:860px}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:var(--s-6);
  padding:var(--s-6) 0;
  font-family:var(--font-serif);font-size:1.5rem;font-weight:400;line-height:1.25;
  transition:color var(--dur-fast) var(--ease-out);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary h3{font:inherit;font-weight:400;margin:0}
.faq-item summary:hover{color:var(--blue-strong)}
.faq-sign{flex:0 0 auto;width:20px;height:20px;position:relative;margin-top:.55rem}
.faq-sign:before,.faq-sign:after{
  content:"";position:absolute;left:50%;top:50%;background:var(--muted);
  transform:translate(-50%,-50%);transition:transform var(--dur-base) var(--ease-out);
}
.faq-sign:before{width:14px;height:1px}
.faq-sign:after{width:1px;height:14px}
.faq-item[open] .faq-sign:after{transform:translate(-50%,-50%) scaleY(0)}
.faq-answer{padding:0 0 var(--s-6);max-width:680px;color:var(--muted);line-height:1.75;font-size:.95rem}

/* ---------- 13. Chiusura e scarico dell'applicazione ---------- */

.final{
  min-height:70vh;display:grid;place-items:center;text-align:center;
  padding:var(--s-24) var(--s-8);background:var(--paper);
}
.final h2{font-family:var(--font-serif);font-size:clamp(3rem,7vw,6rem);font-weight:400;max-width:900px;line-height:.98}
.final .final-sub{color:var(--muted);margin-top:1.3rem}

.store-tray{
  display:flex;gap:var(--s-4);align-items:center;justify-content:center;flex-wrap:wrap;
  width:fit-content;max-width:100%;
  margin:var(--s-10) auto 0;
  padding:var(--s-5) var(--s-6);
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-l);box-shadow:var(--shadow-sm);
  min-height:92px;
}
.store-soon,.store-live{display:flex;gap:var(--s-4);align-items:center;justify-content:center;flex-wrap:wrap}
.store-badge{display:inline-flex}
.store-badge img{display:block;height:52px;width:auto}
.store-badge:hover{transform:translateY(-2px);filter:brightness(.94)}
.store-badge{transition:transform var(--dur-fast) var(--ease-out),filter var(--dur-fast) var(--ease-out)}

.store-pill{
  display:inline-flex;align-items:center;
  border:1px solid var(--line-strong);background:transparent;
  border-radius:var(--r-pill);padding:var(--s-3) var(--s-5);
  font-size:var(--fs-small);color:var(--muted);
}

.button{
  display:inline-flex;margin-top:var(--s-8);
  padding:1rem 1.4rem;background:var(--graphite);color:#fff;
  border-radius:var(--r-pill);font-size:.82rem;
  transition:background var(--dur-fast) var(--ease-out),transform var(--dur-fast) var(--ease-out);
}
.button:hover{background:var(--graphite-hover);transform:translateY(-2px)}
.button:active{background:var(--graphite-active)}

.final-note{margin:var(--s-5) auto 0;font-size:var(--fs-micro);color:var(--muted);max-width:460px}

/* commutazione fra prima e dopo la pubblicazione */
.final[data-stato="presto"] .store-live{display:none}
.final[data-stato="live"] .store-soon{display:none}
.final[data-stato="live"] .final-note{display:none}

/* ---------- 14. Piè di pagina ---------- */

.site-footer{background:var(--graphite);color:rgba(255,255,255,.72);padding:var(--s-16) var(--s-12) var(--s-10)}
.footer-grid{max-width:1180px;margin:auto;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:var(--s-10)}
.footer-brand .logo{display:inline-block;color:#fff;margin-bottom:var(--s-4)}
.footer-brand p{font-size:.85rem;line-height:1.7;max-width:360px}
.footer-col h2{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--glacier);font-weight:500;margin-bottom:var(--s-4)}
.footer-col ul{list-style:none;display:grid;gap:.6rem;font-size:.85rem}
.footer-col a{transition:color var(--dur-fast) var(--ease-out)}
.footer-col a:hover{color:#fff}
.footer-legal{
  max-width:1180px;margin:var(--s-12) auto 0;padding-top:var(--s-6);
  border-top:1px solid rgba(255,255,255,.14);
  font-size:var(--fs-micro);line-height:1.7;color:rgba(255,255,255,.62);
}

/* ---------- 15. Adattamento ---------- */

@media (max-width:1120px){
  .flow,.principles{grid-template-columns:repeat(2,1fr)}

  .depth-stage{
    display:grid;grid-template-columns:150px 1fr;gap:var(--s-6);
    align-items:center;padding:var(--s-8);min-height:640px;
  }
  .depth-map{position:relative;left:auto;top:auto;transform:none;width:100%;max-width:520px;height:520px;margin:auto}
  .strata-legend{
    position:static;left:auto;top:auto;transform:none;
    width:auto;height:auto;
    display:grid;gap:var(--s-8);pointer-events:auto;
  }
  .strata-label{position:static;width:auto}
  .depth-caption{position:static;grid-column:1 / -1;width:100%;margin-top:var(--s-6)}
  .depth-hint{position:static;grid-column:1 / -1;text-align:right}
  .strata-key{max-width:42%;white-space:normal}
}

@media (max-width:900px){
  nav{padding:var(--s-4) var(--s-5)}
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .section{padding:var(--s-24) var(--s-5)}
  .demo-grid{grid-template-columns:1fr;gap:var(--s-12)}
  .demo-copy{order:-1}
  .story-demo{grid-template-columns:1fr;gap:var(--s-10)}
  .story-side{grid-template-columns:repeat(3,1fr)}
  .flow-card{min-height:460px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--s-8)}
  .footer-brand{grid-column:1 / -1}
  .site-footer{padding:var(--s-12) var(--s-5) var(--s-8)}
}

@media (max-width:620px){
  .flow,.principles,.export-grid{grid-template-columns:1fr}
  .flow-card{min-height:450px}
  .flow-photo{min-height:215px}

  .hero h1{font-size:clamp(2.6rem,11vw,3.55rem)}
  .word-cycle{font-size:clamp(4.6rem,24vw,8rem);top:43%;-webkit-text-stroke:.9px rgba(255,255,255,.22)}

  .story-side{
    grid-auto-flow:column;grid-auto-columns:78vw;grid-template-columns:none;
    overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding-left:var(--s-5);
    margin-inline:calc(var(--s-5) * -1);padding-inline:var(--s-5);
    padding-bottom:var(--s-4);scrollbar-width:none;
  }
  .story-side::-webkit-scrollbar{display:none}
  .story-explain{scroll-snap-align:start}
  .story-dots{display:grid;grid-auto-flow:column;justify-content:center;gap:6px;margin-top:var(--s-4)}
  .story-dots i{display:block;width:22px;height:2px;border-radius:3px;background:rgba(255,255,255,.3);transition:background var(--dur-fast) var(--ease-out)}
  .story-dots i.is-on{background:#fff}

  .depth-stage{grid-template-columns:1fr;padding:var(--s-5);min-height:auto}
  .strata-legend{
    grid-auto-flow:column;grid-auto-columns:62vw;gap:var(--s-4);
    overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding-bottom:var(--s-3);
  }
  .strata-legend::-webkit-scrollbar{display:none}
  .strata-legend .strata-label{scroll-snap-align:start}
  .depth-map{height:400px;max-width:100%}
  .strata-key{font-size:var(--fs-micro)}
  .depth-hint{text-align:left}

  .faq-item summary{font-size:1.25rem}
  .footer-grid{grid-template-columns:1fr}
}

@media (max-width:400px){
  .store-tray,.store-soon,.store-live{flex-direction:column}
  .store-badge img,.store-pill{width:min(260px,100%)}
  .store-pill{justify-content:center}
}

/* ---------- 16. Movimento ridotto ---------- */

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .wave i{animation:none;height:22px}
  .word-cycle{transition:none}
}