/* BERTOLDI Cybersecurity - foglio di stile condiviso (it.html + eng.html) */
:root{
  /* ---- palette ancorata a bcsec.io (#1c1408 = unico caldo dichiarato dal sito) ---- */
  --bg:#140f08;        /* fondo: nero caldo */
  --bg-2:#1c1408;      /* pannelli: il marrone scuro reale di bcsec */
  --bg-3:#241a0c;      /* hover */
  --line:#3a2e1c;      /* bordi caldi */
  --ink:#f1ece1;       /* testo chiaro caldo */
  --muted:#a89c86;
  /* ============================================================
     ORO ACCENTO — SEGNAPOSTO, calibrato a vista sulle immagini.
     >>> Sostituisci SOLO questo valore con l'oro esatto di bcsec.io <<<
     Tutto il resto (hover, tinte) si aggiorna da solo.
     ============================================================ */
  --gold:#c6a567;
  --gold-soft:color-mix(in srgb, var(--gold), white 18%);
  --hair:1px solid var(--line);
  --maxw:1140px; --pad:clamp(1.25rem,4vw,3.5rem);
  --display:"Electrolize", "Montserrat", sans-serif;   /* titoli/marchio: tecnico, squadrato */
  --sans:"Montserrat", "Helvetica Neue", Arial, sans-serif; /* corpo */
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-weight:400;
  font-size:clamp(17px,1.15vw,19px);line-height:1.6;letter-spacing:.005em;overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.eyebrow{font-family:var(--display);font-size:.86rem;letter-spacing:.24em;text-transform:uppercase;color:var(--gold)}

/* HEADER */
header.site{position:sticky;top:0;z-index:50;background:rgba(20,15,8,.85);
  backdrop-filter:saturate(140%) blur(10px);border-bottom:var(--hair)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;flex-direction:column;line-height:1}
.brand b{font-family:var(--display);font-weight:400;letter-spacing:.08em;font-size:1.08rem}
.brand span{font-family:var(--display);font-size:.72rem;letter-spacing:.28em;text-transform:uppercase;color:var(--muted);margin-top:.45rem}
.nav ul{display:flex;gap:1.9rem;list-style:none;align-items:center}
.nav a.link{font-size:.94rem;letter-spacing:.05em;color:var(--muted);transition:color .2s}
.nav a.link:hover{color:var(--ink)}
.nav .lang{font-family:var(--display);font-size:.86rem;letter-spacing:.14em;font-weight:700;color:var(--muted);transition:color .2s}
.nav .lang:hover{color:var(--ink)}
.nav .lang.current{color:var(--gold)}
.nav .lang.box{border:1px solid var(--gold);border-radius:2px;padding:.5rem .8rem;color:var(--gold)}
.nav .lang.box:hover{background:var(--gold);color:var(--bg)}
.nav .offensive{font-family:var(--display);font-size:.76rem;letter-spacing:.16em;text-transform:uppercase;
  border:1px solid var(--line);padding:.55rem .9rem;border-radius:2px;color:var(--ink);transition:.25s}
.nav .offensive:hover{background:var(--gold);color:var(--bg);border-color:var(--gold)}

/* HERO */
.hero{position:relative;padding:clamp(3rem,7vh,5rem) 0 clamp(4rem,9vh,7rem)}
.hero-frame{position:relative;border:var(--hair);border-radius:4px;overflow:hidden;
  padding:clamp(3rem,9vw,7rem) clamp(1.5rem,5vw,4.5rem);min-height:60vh;
  display:flex;flex-direction:column;justify-content:center}
.hero-frame::before{content:"";position:absolute;inset:0;z-index:0;opacity:.55;
  background:repeating-radial-gradient(circle at 80% 24%,
     transparent 0 13px, color-mix(in srgb,var(--gold),transparent 88%) 13px 14px, transparent 14px 27px);
  -webkit-mask-image:radial-gradient(120% 110% at 80% 24%,#000 35%,transparent 78%);
          mask-image:radial-gradient(120% 110% at 80% 24%,#000 35%,transparent 78%)}
.hero-frame::after{content:"";position:absolute;inset:0;z-index:0;opacity:.3;
  background:repeating-radial-gradient(circle at 80% 24%,
     transparent 0 27px, rgba(241,236,225,.06) 27px 28px, transparent 28px 55px)}
.hero-frame>*{position:relative;z-index:1}
.hero .eyebrow{display:block;margin-bottom:2rem}
.hero h1{font-family:var(--display);font-weight:400;
  font-size:clamp(2.2rem,5.2vw,4.2rem);line-height:1.12;letter-spacing:-.01em;max-width:19ch}
.hero h1 .hl{color:var(--gold);font-weight:500}
.hero .sub{margin-top:1.9rem;max-width:34ch;font-size:clamp(1.05rem,1.6vw,1.3rem);color:#d8d0c1;line-height:1.5}
.btn{font-family:var(--display);font-size:.9rem;letter-spacing:.13em;text-transform:uppercase;
  padding:1.05rem 1.8rem;border-radius:2px;border:1px solid var(--gold);
  display:inline-flex;align-items:center;gap:.6rem;transition:.25s;cursor:pointer;margin-top:2.6rem}
.btn-solid{background:var(--gold);color:var(--bg)}
.btn-solid:hover{background:var(--gold-soft);border-color:var(--gold-soft)}
.assurances{display:flex;flex-wrap:wrap;gap:1.4rem 2.2rem;margin-top:2.4rem;
  font-family:var(--display);font-size:.84rem;letter-spacing:.1em;color:var(--muted)}
.assurances span{display:inline-flex;align-items:center;gap:.55rem}
.assurances span::before{content:"";width:5px;height:5px;background:var(--gold);border-radius:50%}

/* SECTION */
section{padding:clamp(4.5rem,11vh,8rem) 0;border-top:var(--hair)}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:2rem;flex-wrap:wrap;margin-bottom:3rem}
.sec-head h2{font-family:var(--sans);font-weight:300;font-size:clamp(1.9rem,4.4vw,3.2rem);
  letter-spacing:-.01em;line-height:1.08;max-width:18ch}
.sec-head .num{font-family:var(--display);font-size:.84rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);white-space:nowrap}

/* SERVIZI */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--hair);
  background:var(--line);border:var(--hair);border-radius:3px;overflow:hidden}
.card{background:var(--bg-2);padding:clamp(2rem,3.4vw,3rem);min-height:175px;
  display:flex;flex-direction:column;justify-content:flex-end;gap:.55rem;transition:background .3s}
.card:hover{background:var(--bg-3)}
.card h3{font-family:var(--display);font-weight:400;font-size:1.55rem;letter-spacing:.01em}
.card .tag{font-size:1.1rem;color:#cfc6b6;line-height:1.45}
.card.soc{grid-column:1 / -1;background:linear-gradient(180deg,#241a0c,var(--bg-2));border-top:2px solid var(--gold)}
.card.soc h3{color:var(--gold)}
.card.soc:hover{background:linear-gradient(180deg,#2c2010,#241a0c)}
@media(max-width:680px){.cards{grid-template-columns:1fr}}
.listino-line{margin-top:2.2rem;display:flex;flex-wrap:wrap;align-items:center;gap:1rem;
  justify-content:space-between;font-size:1.04rem;color:var(--muted)}
.listino-line a{font-family:var(--display);font-size:.86rem;letter-spacing:.1em;text-transform:uppercase;
  border-bottom:1px solid var(--gold);padding-bottom:.2rem;color:var(--gold)}
.listino-line a:hover{color:var(--gold-soft)}

/* CREDIBILITA */
.trust .sec-head h2{max-width:18ch}
.trust p{max-width:44ch;color:#cfc6b6;font-size:1.16rem;line-height:1.55;margin-bottom:2rem}
.proof{display:flex;flex-wrap:wrap;gap:.6rem}
.proof a{font-family:var(--display);font-size:.84rem;letter-spacing:.06em;
  border:1px solid var(--line);padding:.7rem 1.05rem;border-radius:22px;color:var(--ink);transition:.25s}
.proof a:hover{border-color:var(--gold);color:var(--gold)}
.offensive-link{display:inline-flex;align-items:center;gap:.5rem;margin-top:2rem;
  font-family:var(--display);font-size:.88rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--gold);border-bottom:1px solid var(--gold);padding-bottom:.25rem}
.offensive-link:hover{color:var(--gold-soft)}
.research{margin-top:2.6rem;padding:clamp(1.8rem,3.4vw,2.8rem);background:var(--bg-2);
  border:var(--hair);border-left:2px solid var(--gold);border-radius:3px}
.research .venue{font-family:var(--display);font-size:.84rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.research .talk{font-family:var(--display);font-weight:400;font-size:clamp(1.15rem,2.2vw,1.6rem);
  line-height:1.25;margin:1rem 0 .8rem;color:var(--ink)}
.research .authors{font-size:1.04rem;color:var(--muted);margin-bottom:1.4rem}
.research .abstract{max-width:70ch;color:#cfc6b6;font-size:1.1rem;line-height:1.65;margin-bottom:1.8rem}
.research .proof{margin-top:0}

/* CONTATTI */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:3rem}
.contact .big a{font-family:var(--sans);font-weight:300;font-size:clamp(1.7rem,3.6vw,2.6rem);
  display:block;line-height:1.4;border-bottom:var(--hair);padding:.6rem 0;transition:.25s}
.contact .big a:hover{padding-left:.6rem;color:var(--gold)}
.contact .meta{font-family:var(--display);font-size:clamp(.86rem,.62rem + .6vw,1.02rem);letter-spacing:.06em;color:var(--muted);line-height:1.95}
.contact .meta a{color:var(--gold);border-bottom:1px solid var(--line)}
.contact .meta a:hover{color:var(--gold-soft)}
/* blocco contatti: gruppi distinti e respiro */
.contact .meta .org{margin:0}
.contact .meta .remote{margin-top:1.9rem;padding-top:1.7rem;border-top:var(--hair)}
.remote-label{font-family:var(--display);font-size:clamp(.8rem,.64rem + .4vw,.92rem);letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink);margin:0 0 1rem}
.remote-terms{font-family:var(--sans);font-size:clamp(.78rem,.6rem + .42vw,.92rem);line-height:1.7;letter-spacing:normal;
  text-transform:none;color:var(--muted);max-width:46ch;
  margin:0 0 1.4rem;padding-left:.95rem;border-left:1px solid var(--line)}
.remote-actions{display:flex;flex-direction:column;gap:.75rem}
.tv-link{font-family:var(--display);font-size:clamp(.84rem,.66rem + .45vw,.98rem);letter-spacing:.08em;color:var(--gold);
  display:inline-flex;align-items:center;gap:.4rem;width:fit-content;
  border-bottom:1px solid var(--line);padding-bottom:.25rem;transition:.2s}
.tv-link:hover{color:var(--gold-soft);border-color:var(--gold)}
@media(max-width:600px){.contact{grid-template-columns:1fr;gap:2rem}}

/* FOOTER */
footer.site{border-top:var(--hair);padding:2.6rem 0}
.foot{display:flex;flex-wrap:wrap;gap:1rem 2rem;align-items:center;justify-content:space-between;
  font-family:var(--display);font-size:.84rem;letter-spacing:.06em;color:var(--muted)}
.foot a:hover{color:var(--gold)}

@media(prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(18px);animation:rise .9s cubic-bezier(.2,.7,.2,1) forwards}
  @keyframes rise{to{opacity:1;transform:none}}
  .d1{animation-delay:.05s}.d2{animation-delay:.18s}.d3{animation-delay:.34s}.d4{animation-delay:.5s}
}

/* ============================================================
   RESPONSIVE — tablet e mobile
   Priorità: leggibilità, ordine, equilibrio degli spazi, eleganza.
   ============================================================ */
@media (max-width:760px){
  /* HEADER: si tiene solo marchio + lingua; le sezioni si raggiungono scorrendo */
  .nav a.link{display:none}
  .nav ul{gap:1rem}
  .nav .lang.box{padding:.6rem 1rem}          /* area di tocco più comoda */
  .brand span{letter-spacing:.26em}

  /* HERO: più compatta, respiro misurato */
  .hero{padding:clamp(2rem,5vh,3rem) 0 clamp(2.5rem,6vh,4rem)}
  .hero-frame{padding:clamp(2.4rem,8vw,3.4rem) clamp(1.25rem,5vw,1.8rem);min-height:62vh}
  .hero .eyebrow{margin-bottom:1.4rem}
  .hero .sub{margin-top:1.4rem}
  .btn{margin-top:2rem;justify-content:center}  /* CTA piena larghezza, testo centrato */
  .assurances{margin-top:1.8rem}

  /* SEZIONI: meno vuoto verticale; intestazione impilata con l'indice sopra il titolo */
  section{padding:3.4rem 0}
  .sec-head{flex-direction:column-reverse;align-items:flex-start;gap:.6rem;margin-bottom:2rem}

  /* SERVIZI */
  .card{min-height:140px;padding:1.7rem}

  /* RICERCA */
  .research{padding:1.6rem 1.4rem;margin-top:2rem}

  /* CONTATTI */
  .contact{gap:1.8rem}

  /* FOOTER centrato */
  .foot{justify-content:center;text-align:center;gap:.7rem 1.4rem}
}

@media (max-width:430px){
  .hero h1{font-size:2rem;line-height:1.16}
  .hero-frame{min-height:58vh}
  .contact .big a{font-size:1.55rem}
  .listino-line{gap:.7rem}
}