/* =============================================================================
   STUDIO — shared.css
   Direzione: "Cinematic Void / Analog Meditation"
   Nero CALDO, accenti ambra->oro, display serif drammatico, grana, vuoto.
   Stili condivisi da tutte le pagine (Home / Lavori / Studio / Contatti).
   ============================================================================= */

/* ---------- View Transitions cross-document (transizioni cucite tra pagine) ---------- */
@view-transition { navigation: auto; }

/* =========================== TOKEN SEMANTICI =============================== */
:root{
  /* --- Palette "Cinematic Void": near-black CALDO, mai #000 puro --- */
  --void-0:#07060a;            /* fondo più profondo (caldo) */
  --void-1:#0d0b11;            /* fondo superfici */
  --void-2:#15121b;            /* elevazione */
  --void-3:#1d1825;            /* hover su superfici */
  --bone:#efe9df;              /* off-white caldo per il testo principale */
  --bone-dim:#a59c8f;          /* testo secondario, caldo */
  --bone-faint:#6f685e;        /* testo terziario / metadati spenti */
  --line:rgba(239,233,223,.12);
  --line-strong:rgba(239,233,223,.22);

  /* Bianco puro SOLO per la nav: serve a mix-blend-mode:difference per restare
     leggibile su qualsiasi frame della scena. Astratto in token (no #fff sparsi). */
  --nav-fg:#ffffff;

  /* --- Un accento per zona: ambra -> oro (luce da proiettore) --- */
  --ember:#ff8a3d;             /* accento primario, caldo */
  --ember-bright:#ffb24d;      /* high-key, per glow/particelle */
  --ember-deep:#c14f16;        /* tinta scura della stessa famiglia (testo su ambra) */
  --gold:#e7c06a;             /* accento secondario, classico */

  /* --- Type scale fluida (clamp): voce editoriale, oversize --- */
  --fs-display:clamp(2.6rem,8.4vw,7.4rem);   /* h1 hero */
  --fs-h2:clamp(1.9rem,4.4vw,3.6rem);
  --fs-h3:clamp(1.5rem,3vw,2.5rem);
  --fs-h4:clamp(1.25rem,2.2vw,1.9rem);
  --fs-lead:clamp(1rem,1.5vw,1.2rem);        /* paragrafo guida */
  --fs-body:1rem;
  --fs-small:.86rem;
  --fs-meta:.72rem;                           /* mono / label */

  /* --- Spacing (scala con un ritmo, non uniforme) --- */
  --sp-1:.5rem;
  --sp-2:1rem;
  --sp-3:1.5rem;
  --sp-4:2.5rem;
  --sp-5:4rem;
  --sp-6:6rem;
  --sp-section:clamp(5rem,12vh,11rem);        /* respiro verticale tra sezioni */

  /* --- Radius: gerarchia con un motivo (mai un radius unico ovunque) --- */
  --r-sharp:2px;               /* spigolo dichiarato */
  --r-soft:10px;
  --r-cut:2px 14px 2px 14px;   /* taglio asimmetrico firma (chip/cta) */

  /* --- Motion language: 3 durate + easing custom, riusati ovunque --- */
  --d-fast:.22s;
  --d-norm:.55s;
  --d-slow:1.1s;
  --ease-cine:cubic-bezier(.16,1,.3,1);     /* ingresso fluido, decelerazione lunga */
  --ease-soft:cubic-bezier(.65,.05,.36,1);  /* push/pull */
  --ease-out:cubic-bezier(.22,.61,.36,1);

  /* --- Layout --- */
  --maxw:1240px;
  --gutter:clamp(18px,5vw,46px);

  /* --- Font stack semantici --- */
  --font-display:"Fraunces",Georgia,"Times New Roman",serif;  /* titoloni drammatici */
  --font-sans:"Space Grotesk",ui-sans-serif,system-ui,"Segoe UI",sans-serif; /* body, NON Inter */
  --font-mono:"Space Grotesk",ui-monospace,"SFMono-Regular",monospace;       /* metadati/label */
}

/* =============================== RESET ===================================== */
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:auto}
body{
  background:var(--void-0);
  color:var(--bone);
  font-family:var(--font-sans);
  font-weight:400;
  line-height:1.55;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:var(--ember);color:#160a03}

/* focus visibile (accessibilità) */
:focus-visible{
  outline:2px solid var(--ember);
  outline-offset:3px;
  border-radius:var(--r-sharp);
}

/* =========================== GRANA + VIGNETTA ============================= */
/* Overlay cinematografici globali — texture che rompe il "troppo liscio" */
.grain{
  position:fixed;inset:-50%;z-index:90;pointer-events:none;
  opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grain 1.1s steps(4) infinite;
}
@keyframes grain{
  0%{transform:translate(0,0)} 25%{transform:translate(-3%,2%)}
  50%{transform:translate(2%,-3%)} 75%{transform:translate(-2%,-2%)} 100%{transform:translate(3%,2%)}
}
.vignette{
  position:fixed;inset:0;z-index:80;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 42%,transparent 52%,rgba(7,6,10,.55) 88%,rgba(7,6,10,.9) 100%);
}

/* =========================== LOADER SIPARIO =============================== */
/* Copre il flash iniziale (e il "buco nero" del canvas vuoto) finché la scena
   3D non è pronta. Personalità Cinematic Void: nero caldo, counter mono, ambra.
   Montato/animato da shared.js (initLoader); qui solo la pelle. */
.curtain{
  position:fixed;inset:0;z-index:200;
  background:var(--void-0);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:26px;
  will-change:transform;
}
.curtain-mark{
  font-family:var(--font-display);font-weight:500;font-size:clamp(18px,4vw,26px);
  letter-spacing:.5em;padding-left:.5em;color:var(--bone);opacity:.9;
}
.curtain-count{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(3.2rem,12vw,7rem);line-height:1;color:var(--ember);letter-spacing:.02em;
}
.curtain-bar{
  width:min(220px,52vw);height:1px;background:var(--line-strong);overflow:hidden;
}
.curtain-bar-fill{
  display:block;width:100%;height:100%;background:var(--ember);
  transform:scaleX(0);transform-origin:left;will-change:transform;
}
/* fallback / reduced-motion: niente counter animato, sipario che sfuma via */
.curtain.is-static{transition:opacity var(--d-norm) var(--ease-out)}
.curtain.is-static.curtain--up{opacity:0;pointer-events:none}
.curtain.is-static .curtain-count{color:var(--bone-dim)}

/* =============================== NAV ====================================== */
nav.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--gutter);
  mix-blend-mode:difference;     /* il wordmark resta leggibile su qualsiasi frame della scena */
}
.wordmark{
  font-family:var(--font-display);font-weight:500;font-size:19px;
  letter-spacing:.42em;padding-left:.42em;color:var(--nav-fg);
  view-transition-name:wordmark; /* il wordmark "persiste" tra le pagine */
}
.nav-links{
  display:flex;align-items:center;gap:26px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--nav-fg);
}
.nav-links a{position:relative;opacity:.62;transition:opacity var(--d-fast) var(--ease-out)}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:1px;
  background:var(--ember);transform:scaleX(0);transform-origin:left;
  transition:transform var(--d-norm) var(--ease-cine);
}
.nav-links a:hover{opacity:1}
.nav-links a:active{opacity:.8}        /* press feedback */
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after{transform:scaleX(1)}
.nav-links a[aria-current="page"]{opacity:1}

/* CTA dentro la nav */
.nav-cta{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;
  color:#07060a;background:var(--nav-fg);padding:9px 16px;border-radius:var(--r-cut);
  transition:transform var(--d-fast) var(--ease-out);will-change:transform;
}
.nav-cta::after{display:none}
.nav-cta:hover{transform:translateY(-1px)}
.nav-cta:active{transform:scale(.96)}

/* hamburger (mobile) */
.nav-toggle{display:none}
@media(max-width:720px){
  .nav-links{
    position:fixed;inset:0;z-index:69;
    flex-direction:column;justify-content:center;gap:34px;
    background:rgba(7,6,10,.96);backdrop-filter:blur(10px);
    font-size:18px;letter-spacing:.1em;mix-blend-mode:normal;
    opacity:0;pointer-events:none;transform:translateY(-8px);
    transition:opacity var(--d-norm) var(--ease-out),transform var(--d-norm) var(--ease-out);
  }
  nav.site-nav.open .nav-links{opacity:1;pointer-events:auto;transform:none}
  .nav-toggle{
    display:flex;flex-direction:column;gap:5px;z-index:71;
    background:none;border:0;cursor:pointer;padding:6px;
  }
  .nav-toggle span{display:block;width:24px;height:2px;background:var(--nav-fg);transition:transform var(--d-fast) var(--ease-out),opacity var(--d-fast)}
  nav.site-nav.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  nav.site-nav.open .nav-toggle span:nth-child(2){opacity:0}
  nav.site-nav.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* =============================== TIPOGRAFIA =============================== */
h1{
  font-family:var(--font-display);font-weight:400;
  font-size:var(--fs-display);line-height:.96;letter-spacing:-.02em;
  text-wrap:balance;color:var(--bone);
}
h1 em{font-style:italic;font-weight:300;color:var(--gold)}
h1 .line{display:block;overflow:hidden}
h1 .line > span{display:block;will-change:transform}

h2{
  font-family:var(--font-display);font-weight:300;
  font-size:var(--fs-h2);line-height:1.06;letter-spacing:-.015em;text-wrap:balance;
}
h2 b{font-weight:500;color:var(--gold)}
h3{font-family:var(--font-display);font-weight:400;font-size:var(--fs-h3);letter-spacing:-.01em;line-height:1.05}
h4{font-family:var(--font-display);font-weight:400;font-size:var(--fs-h4);letter-spacing:-.01em}

p{text-wrap:pretty}
.lead{font-size:var(--fs-lead);color:var(--bone-dim);max-width:54ch}

/* eyebrow / section tag / metadati mono */
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--font-mono);font-size:var(--fs-meta);letter-spacing:.24em;text-transform:uppercase;
  color:var(--bone-dim);
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--ember)}

.section-tag{
  font-family:var(--font-mono);font-size:var(--fs-meta);letter-spacing:.2em;text-transform:uppercase;
  color:var(--ember);display:flex;align-items:center;gap:14px;
}
.section-tag .num{font-family:var(--font-display);font-style:italic;color:var(--bone-dim);font-size:14px}

.meta{font-family:var(--font-mono);font-size:var(--fs-meta);letter-spacing:.14em;text-transform:uppercase;color:var(--bone-faint)}

/* =============================== LAYOUT =================================== */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
section{position:relative;z-index:10}
.section{padding:var(--sp-section) 0}
.section--line{border-top:1px solid var(--line)}

/* griglia editoriale asimmetrica riutilizzabile */
.grid-asym{display:grid;grid-template-columns:1fr;gap:clamp(40px,6vw,90px)}
@media(min-width:920px){ .grid-asym{grid-template-columns:.85fr 1.15fr;align-items:start} }

/* =================== HERO: FALLBACK + SCROLL-HINT (condivisi) ============= */
/* Erano copia-incollati identici in index/lavori/studio (e quasi in contatti).
   Qui una volta sola; le pagine sovrascrivono solo ciò che differisce
   (altezza dell'hero, posizione del faro nella pagina contatti). */
.hero-fallback{
  position:absolute;inset:0;z-index:0;opacity:0;transition:opacity 1.4s ease;
  background:
    radial-gradient(closest-side at 50% 46%, rgba(255,138,61,.30), rgba(193,79,22,.10) 45%, transparent 72%),
    radial-gradient(120% 80% at 50% 120%, rgba(231,192,106,.10), transparent 60%);
}
.hero-fallback.show{opacity:1}
.hero-fallback::after{
  content:"";position:absolute;left:50%;top:46%;width:min(40vw,320px);aspect-ratio:1;
  transform:translate(-50%,-50%) rotate(45deg);
  border:1px solid rgba(239,233,223,.22);
  box-shadow:inset 0 0 80px rgba(255,138,61,.18), 0 0 60px rgba(255,138,61,.10);
  animation:floaty 9s ease-in-out infinite;
}
@keyframes floaty{0%,100%{transform:translate(-50%,-52%) rotate(44deg)}50%{transform:translate(-50%,-48%) rotate(46deg)}}

.scroll-hint{
  position:absolute;z-index:10;right:var(--gutter);bottom:clamp(34px,8vh,84px);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--bone-dim);
  writing-mode:vertical-rl;display:flex;align-items:center;gap:14px;
}
.scroll-hint::after{content:"";width:1px;height:54px;background:linear-gradient(var(--ember),transparent);animation:trickle 2.4s var(--ease-soft) infinite}
@keyframes trickle{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
@media(max-width:680px){ .scroll-hint{display:none} }

/* =============================== BOTTONI ================================== */
.cta{
  position:relative;display:inline-flex;align-items:center;gap:12px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--void-0);background:var(--bone);
  padding:15px 26px;border-radius:var(--r-cut);will-change:transform;
  transition:background var(--d-fast) var(--ease-out),color var(--d-fast) var(--ease-out);
}
.cta:hover{background:var(--ember);color:#160a03}
.cta:active{transform:scale(.96)}          /* press: il click "risponde" */
.cta .arrow{transition:transform var(--d-norm) var(--ease-cine)}
.cta:hover .arrow{transform:translateX(5px)}

.cta--ghost{
  background:transparent;color:var(--bone);
  box-shadow:inset 0 0 0 1px var(--line-strong);
}
.cta--ghost:hover{background:transparent;color:var(--ember);box-shadow:inset 0 0 0 1px var(--ember)}

.link-quiet{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--bone-dim);
  border-bottom:1px solid transparent;padding-bottom:3px;
  transition:color var(--d-fast) var(--ease-out),border-color var(--d-fast) var(--ease-out);
}
.link-quiet:hover{color:var(--bone);border-color:var(--line-strong)}

/* =============================== FOOTER ================================== */
footer.site-footer{
  background:var(--void-0);border-top:1px solid var(--line);
  padding:var(--sp-6) 0 var(--sp-4);position:relative;z-index:10;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:clamp(36px,5vw,64px);
  align-items:start;
}
@media(min-width:760px){ .footer-grid{grid-template-columns:1.4fr .8fr .8fr} }

.footer-brand .fw{
  font-family:var(--font-display);font-size:28px;letter-spacing:.36em;padding-left:.36em;display:block;
}
.footer-brand p{margin-top:var(--sp-2);color:var(--bone-dim);font-size:var(--fs-small);max-width:34ch}

.footer-col h5{font-family:var(--font-mono);font-size:var(--fs-meta);letter-spacing:.18em;text-transform:uppercase;color:var(--bone-faint);margin-bottom:var(--sp-2)}
.footer-col a{display:block;color:var(--bone-dim);font-size:var(--fs-small);padding:5px 0;transition:color var(--d-fast) var(--ease-out)}
.footer-col a:hover{color:var(--ember)}

.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;
  margin-top:var(--sp-5);padding-top:var(--sp-3);border-top:1px solid var(--line);
}

/* =============================== UTILITY ================================== */
.u-amber{color:var(--ember)}
.u-gold{color:var(--gold)}
.u-dim{color:var(--bone-dim)}
.u-mono{font-family:var(--font-mono)}
.u-center{text-align:center}
.u-tabnum{font-variant-numeric:tabular-nums}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* reveal allo scroll: stato iniziale (lo sblocca shared.js o reduced-motion) */
[data-reveal]{opacity:0;transform:translateY(26px)}
.is-ready [data-reveal]{transition:opacity var(--d-slow) var(--ease-cine),transform var(--d-slow) var(--ease-cine)}

/* =========================== VIEW TRANSITIONS ============================ */
/* fade caldo coreografato tra documenti (fallback nativo se l'API c'è) */
::view-transition-old(root){
  animation:vt-out .35s var(--ease-soft) both;
}
::view-transition-new(root){
  animation:vt-in .55s var(--ease-cine) both;
}
@keyframes vt-out{to{opacity:0;transform:translateY(-1.5%) scale(.992)}}
@keyframes vt-in{from{opacity:0;transform:translateY(1.5%) scale(1.006)}}

/* =========================== REDUCED MOTION ============================== */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001s!important;scroll-behavior:auto!important}
  [data-reveal]{opacity:1!important;transform:none!important}
  h1 .line > span{transform:none!important}
  ::view-transition-old(root),::view-transition-new(root){animation:none!important}
  /* il sipario non deve MAI restare a coprire la pagina senza motion */
  .curtain{opacity:0!important;pointer-events:none!important}
}