/* ===========================================================
   AI4SI — Hub (genitore di Aristeo Lab + Metodo Nicias)
   Light, navy + gold identity. Children color-coded:
   blue = impresa, green = scuola. Sibling of both.
   =========================================================== */

:root{
  --paper:#F7F5F0;        /* warm ivory */
  --surface:#FFFFFF;
  --surface-2:#EEEAE1;
  --ink:#0B1F3A;          /* navy */
  --ink-deep:#081627;
  --header-bg:#0B1F3A;

  --text:#1C2B3A;
  --muted:#56697B;
  --on-dark:#E6ECF3;
  --on-dark-dim:#9DB0C2;

  /* parent identity */
  --gold:#C99A3F;
  --gold-deep:#A87C2B;
  --gold-soft:#F4EAD4;

  /* impresa (blue) */
  --blue:#1666E0;
  --blue-deep:#0E47A1;
  --blue-soft:#E7F0FD;
  /* scuola (green) */
  --green:#2E6B4E;
  --green-deep:#1F4D38;
  --green-soft:#E6F0EA;

  --border:#E4DFD4;
  --border-2:#D8D1C2;
  --shadow-sm:0 1px 2px rgba(11,31,58,.05),0 2px 8px rgba(11,31,58,.04);
  --shadow:0 8px 24px rgba(11,31,58,.08),0 2px 6px rgba(11,31,58,.05);
  --shadow-lg:0 26px 60px rgba(11,31,58,.16);

  --radius:16px;
  --radius-sm:10px;
  --radius-lg:24px;

  --font-head:'Spectral',Georgia,'Times New Roman',serif;
  --font-body:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;

  --wrap:1180px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--paper);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-deep)}
img{max-width:100%;display:block}
.ico{width:1em;height:1em;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.14em;flex-shrink:0}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.55em;justify-content:center;font-family:var(--font-body);font-weight:600;font-size:1rem;padding:.78em 1.5em;border-radius:999px;border:1.5px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;line-height:1;white-space:nowrap}
.btn .ico{font-size:1.15em}
.btn-gold{background:var(--gold);color:#fff;box-shadow:0 8px 20px rgba(201,154,63,.26)}
.btn-gold:hover{background:var(--gold-deep);color:#fff;transform:translateY(-2px)}
.btn-blue{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(22,102,224,.22)}
.btn-blue:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px)}
.btn-green{background:var(--green);color:#fff;box-shadow:0 8px 20px rgba(46,107,78,.22)}
.btn-green:hover{background:var(--green-deep);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--border-2)}
.btn-ghost:hover{border-color:var(--ink);background:var(--surface-2)}
.btn-on-dark{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.3)}
.btn-on-dark:hover{background:rgba(255,255,255,.18);color:#fff}
.btn-lg{font-size:1.06rem;padding:.95em 1.9em}
.btn-sm{font-size:.9rem;padding:.6em 1.1em}

/* ---------- Topbar ---------- */
.topbar{background:var(--ink-deep);color:var(--on-dark)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;padding:9px 28px}
.tb-trust{display:flex;gap:22px;flex-wrap:wrap;font-size:.82rem;font-weight:500}
.tb-trust span{display:inline-flex;align-items:center;gap:7px;color:#C7D4E2}
.tb-trust .ico{color:var(--gold);font-size:1.05em}
.tb-note{font-size:.82rem;color:#B9C7D6;display:inline-flex;align-items:center;gap:7px}
.tb-note .ico{color:var(--gold)}
@media(max-width:880px){.tb-note{display:none}}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:1000;background:var(--header-bg);border-bottom:1px solid rgba(255,255,255,.07)}
.site-header.scrolled{box-shadow:0 8px 30px rgba(8,22,39,.4)}
.site-header nav{max-width:var(--wrap);margin:0 auto;padding:14px 28px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:inline-flex;align-items:baseline;font-family:var(--font-head);font-weight:700;font-size:1.7rem;letter-spacing:.02em;color:#fff}
.brand .four{color:var(--gold);font-style:italic}
.nav-links{list-style:none;display:flex;align-items:center;gap:24px;margin:0}
.nav-links a{color:var(--on-dark-dim);font-size:.94rem;font-weight:500}
.nav-links a:hover{color:#fff}
.nav-links a.nav-cta{color:#fff}
@media(max-width:900px){
  .site-header nav{flex-wrap:wrap;row-gap:0}
  .nav-links{width:100%;justify-content:center;flex-wrap:wrap;gap:14px 18px;margin-top:12px;padding-top:12px;border-top:1px solid rgba(255,255,255,.08)}
}

/* ---------- Hero ---------- */
.hero{background:radial-gradient(120% 100% at 50% 0,#10294a 0,var(--ink) 55%,var(--ink-deep) 100%);color:var(--on-dark);position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(201,154,63,.18),transparent 70%);pointer-events:none}
.hero .wrap{position:relative;z-index:1;padding-top:70px;padding-bottom:60px;text-align:center;max-width:920px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gold)}
.eyebrow .ico{font-size:1.1em}
.hero .eyebrow{background:rgba(201,154,63,.12);border:1px solid rgba(201,154,63,.3);padding:7px 16px;border-radius:999px;margin-bottom:24px}
.hero h1{font-family:var(--font-head);font-weight:700;font-size:clamp(2.5rem,5.6vw,4.2rem);line-height:1.06;letter-spacing:-.01em;color:#fff;text-wrap:balance}
.hero h1 .accent{font-style:italic;color:var(--gold)}
.hero-sub{font-size:clamp(1.1rem,2vw,1.35rem);color:var(--on-dark-dim);max-width:680px;margin:22px auto 0;text-wrap:pretty}
.hero-meta{display:flex;gap:10px 14px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.hero-meta .chip{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:8px 15px;font-size:.86rem;font-weight:500;color:var(--on-dark)}
.hero-meta .chip .ico{color:var(--gold)}

/* ---------- Bivio (two paths) ---------- */
.bivio{position:relative;z-index:1;margin-top:46px;display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:920px;margin-left:auto;margin-right:auto}
@media(max-width:720px){.bivio{grid-template-columns:1fr}}
.path{position:relative;text-align:left;background:var(--surface);border-radius:var(--radius-lg);padding:32px 30px;box-shadow:var(--shadow-lg);border-top:5px solid var(--green);display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease}
.path:hover{transform:translateY(-6px)}
.path.impresa{border-top-color:var(--blue)}
.path-tag{display:inline-flex;align-items:center;gap:7px;font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--green-deep);background:var(--green-soft);padding:5px 12px;border-radius:999px;align-self:flex-start;margin-bottom:14px}
.path.impresa .path-tag{color:var(--blue-deep);background:var(--blue-soft)}
.path h3{font-family:var(--font-head);font-weight:700;font-size:1.65rem;color:var(--ink);line-height:1.1}
.path .who{font-size:.95rem;color:var(--muted);margin:4px 0 12px}
.path p{color:var(--text);font-size:.98rem;margin-bottom:16px}
.path ul{list-style:none;margin:0 0 20px;display:grid;gap:9px}
.path li{display:flex;align-items:flex-start;gap:9px;font-size:.94rem;color:var(--text)}
.path li .ico{color:var(--green);margin-top:.2em;font-size:1.05em}
.path.impresa li .ico{color:var(--blue)}
.path .btn{margin-top:auto;align-self:flex-start}

/* ---------- Sections ---------- */
.section{padding:74px 0}
.section--alt{background:var(--surface-2)}
.section--white{background:var(--surface)}
.section--ink{background:var(--ink);color:var(--on-dark)}
.shead{max-width:720px;margin:0 auto 46px;text-align:center}
.shead .eyebrow{color:var(--gold-deep);margin-bottom:12px}
.shead h2{font-family:var(--font-head);font-weight:700;font-size:clamp(2rem,3.8vw,2.8rem);line-height:1.12;color:var(--ink);letter-spacing:-.01em;text-wrap:balance}
.section--ink .shead h2{color:#fff}
.shead p{color:var(--muted);font-size:1.08rem;margin-top:14px;text-wrap:pretty}
.section--ink .shead p{color:var(--on-dark-dim)}

/* ---------- Jumpbar ---------- */
.jumpbar{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.jumpbar .wrap{display:flex;align-items:center;gap:10px 18px;flex-wrap:wrap;padding:14px 28px}
.jumpbar .jb-label{font-size:.76rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.jumpbar a{display:inline-flex;align-items:center;gap:6px;font-size:.9rem;font-weight:600;color:var(--ink);text-decoration:none}
.jumpbar a:hover{color:var(--gold-deep)}

/* ---------- In 5 punti ---------- */
.def5{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface)}
@media(max-width:900px){.def5{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.def5{grid-template-columns:1fr}}
.def5 .d{padding:26px 22px;border-right:1px solid var(--border)}
.def5 .d:last-child{border-right:none}
@media(max-width:900px){.def5 .d{border-bottom:1px solid var(--border)}}
.def5 .d-ic{width:42px;height:42px;border-radius:11px;background:var(--gold-soft);color:var(--gold-deep);display:grid;place-items:center;margin-bottom:12px}
.def5 .d-ic .ico{font-size:21px}
.def5 h3{font-family:var(--font-body);font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:7px}
.def5 p{font-size:.95rem;color:var(--text);line-height:1.6;margin:0}
.def5 p strong{color:var(--ink)}

/* ---------- Quattro SÌ ---------- */
.si-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:980px){.si-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.si-grid{grid-template-columns:1fr}}
.si-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.si-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--border-2)}
.si-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.si-num{font-family:var(--font-head);font-weight:700;font-size:1.5rem;color:#fff;background:var(--gold);width:48px;height:48px;border-radius:13px;display:grid;place-items:center;flex-shrink:0}
.si-card:nth-child(2) .si-num{background:var(--blue)}
.si-card:nth-child(3) .si-num{background:var(--green)}
.si-card:nth-child(4) .si-num{background:var(--gold-deep)}
.si-title{font-family:var(--font-body);font-weight:700;font-size:1.06rem;color:var(--ink)}
.si-card p{color:var(--muted);font-size:.96rem;line-height:1.66}

/* ---------- Process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
@media(max-width:880px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.steps{grid-template-columns:1fr}}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;position:relative}
.step-n{width:44px;height:44px;border-radius:50%;background:var(--ink);color:#fff;font-family:var(--font-head);font-weight:700;font-size:1.2rem;display:grid;place-items:center;margin-bottom:14px}
.step h4{font-family:var(--font-body);font-size:.82rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--gold-deep);margin-bottom:8px}
.step p{color:var(--muted);font-size:.95rem;line-height:1.6}

/* ---------- Vorrei domandare ---------- */
.askbox-head{max-width:680px;margin:0 auto 24px;text-align:center}
.ask-wrap{max-width:680px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 34px;box-shadow:var(--shadow)}
@media(max-width:560px){.ask-wrap{padding:26px 20px}}
.ask-wrap label{display:block;margin-bottom:7px;font-weight:600;font-size:.9rem;color:var(--text)}
.ask-wrap .optional{color:var(--muted);font-weight:400;font-size:.82rem}
.ask-wrap textarea,.ask-wrap input[type=email],.ask-wrap select{width:100%;padding:.85em 1.05em;background:#FCFBF8;border:1.5px solid var(--border-2);border-radius:var(--radius-sm);color:var(--text);font-size:1rem;font-family:var(--font-body);transition:border-color .2s,box-shadow .2s}
.ask-wrap textarea{min-height:110px;resize:vertical}
.ask-wrap textarea:focus,.ask-wrap input:focus,.ask-wrap select:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,154,63,.14);background:#fff}
.fgroup{margin-bottom:16px}
.ask-consent{display:flex;align-items:flex-start;gap:.65rem;margin:2px 0 16px;font-size:.88rem;color:var(--muted);font-weight:400}
.ask-consent input{margin-top:.18rem;width:18px;height:18px;flex-shrink:0;accent-color:var(--gold-deep);cursor:pointer}
.ask-consent label{font-weight:400;font-size:.88rem;color:var(--muted);margin:0;cursor:pointer}
.btn-submit{width:100%;background:var(--ink);color:#fff;border:none;border-radius:999px;padding:1em;font-size:1.05rem;font-weight:600;font-family:var(--font-body);cursor:pointer;transition:background .2s,transform .15s}
.btn-submit:hover{background:var(--ink-deep);transform:translateY(-1px)}
.btn-submit:disabled{opacity:.6;cursor:not-allowed}
.required{color:var(--gold-deep);font-weight:700}
.form-msg{display:none;margin-top:14px;padding:.9rem 1.1rem;border-radius:var(--radius-sm);font-size:.93rem;line-height:1.5}
.form-msg.success{display:block;background:var(--green-soft);border:1px solid var(--green);color:var(--green-deep)}
.form-msg.error{display:block;background:#FBEAE2;border:1px solid #E2A07F;color:#A9522A}
.ask-note{font-size:.82rem;color:var(--muted);text-align:center;margin-top:12px}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(150deg,var(--ink),#13315a);color:#fff;border-radius:var(--radius-lg);padding:50px 42px;text-align:center;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;top:-70px;right:-50px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(201,154,63,.2),transparent 70%)}
.cta-band h2{font-family:var(--font-head);font-weight:700;font-size:clamp(1.8rem,3.6vw,2.5rem);color:#fff;margin-bottom:12px;position:relative;text-wrap:balance}
.cta-band p{color:rgba(255,255,255,.85);font-size:1.08rem;max-width:600px;margin:0 auto 26px;position:relative}
.cta-band .row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:var(--on-dark-dim);padding:58px 0 30px}
.f-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px;margin-bottom:42px}
@media(max-width:820px){.f-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media(max-width:520px){.f-grid{grid-template-columns:1fr}}
.f-grid h4{color:#fff;font-family:var(--font-head);font-weight:600;font-size:1.1rem;margin-bottom:14px}
.f-grid p{font-size:.94rem;line-height:1.7}
.f-grid ul{list-style:none}
.f-grid li{margin-bottom:9px}
.f-grid a{color:var(--on-dark-dim);font-size:.94rem}
.f-grid a:hover{color:var(--gold)}
.f-brand .word{font-family:var(--font-head);font-weight:700;font-size:1.5rem;color:#fff}
.f-brand .word .four{color:var(--gold);font-style:italic}
.f-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;font-size:.82rem;line-height:1.7;color:var(--on-dark-dim)}
.f-bottom a{color:var(--gold)}
.f-legal{color:#8295A8;font-size:.8rem}
.f-legal a{color:var(--gold)}
.f-signature{text-align:left;font-size:.82rem;color:var(--gold);line-height:1.6;margin-top:10px}

/* ---------- Cookie banner ---------- */
.cookie-banner{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:9500;width:min(960px,calc(100% - 32px));background:#fff;border:1px solid var(--border-2);border-radius:var(--radius);padding:16px 22px;display:flex;align-items:center;gap:18px;flex-wrap:wrap;box-shadow:var(--shadow-lg)}
.cookie-banner[hidden]{display:none}
.cb-msg{flex:1 1 320px;font-size:.9rem;color:var(--muted);line-height:1.5}
.cb-actions{display:flex;gap:10px;flex-wrap:wrap}
.cb-btn{padding:.6rem 1.4rem;border-radius:999px;font-weight:600;font-size:.9rem;cursor:pointer;border:1.5px solid transparent;font-family:var(--font-body)}
.cb-deny{background:transparent;border-color:var(--border-2);color:var(--text)}
.cb-deny:hover{border-color:var(--ink);color:var(--ink)}
.cb-ok{background:var(--ink);color:#fff;border:none}
.cb-ok:hover{background:var(--ink-deep)}

/* ---------- Legal / inner pages ---------- */
.page-hero{background:var(--ink);color:var(--on-dark)}
.page-hero .wrap{padding:54px 28px 46px;text-align:center;max-width:820px}
.page-hero .crumbs{font-size:.85rem;color:var(--on-dark-dim);margin-bottom:14px}
.page-hero .crumbs a{color:var(--gold)}
.page-hero h1{font-family:var(--font-head);font-weight:700;font-size:clamp(2rem,4vw,2.8rem);color:#fff;line-height:1.12;text-wrap:balance}
.page-hero p{color:var(--on-dark-dim);font-size:1.08rem;margin-top:12px;max-width:640px;margin-left:auto;margin-right:auto}
.doc{max-width:820px;margin:0 auto;padding:54px 28px 80px}
.doc h2{font-family:var(--font-head);font-weight:600;font-size:1.35rem;color:var(--ink);margin:30px 0 10px}
.doc p{margin-bottom:14px;color:var(--text)}
.doc ul{margin:0 0 14px 1.2rem}
.doc li{margin-bottom:7px;color:var(--text)}
.doc .updated{color:var(--muted);font-size:.92rem;margin-bottom:8px}
.doc .callout{border-left:4px solid var(--gold);background:var(--gold-soft);padding:16px 20px;border-radius:var(--radius-sm);margin:22px 0;color:var(--text)}

/* ---------- Accessibility & motion ---------- */
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:3px solid var(--gold);outline-offset:2px;border-radius:4px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
}


/* ---------- Domain switcher (AI4SI hierarchy) ---------- */
.brand-lockup{display:flex;flex-direction:column;gap:5px;align-items:flex-start}
.domain-switch{display:flex;align-items:center;gap:6px;font-size:.7rem;font-weight:800;letter-spacing:.03em;text-transform:uppercase}
.domain-switch a{text-decoration:none;padding:2px 9px;border-radius:999px;line-height:1.6;color:var(--on-dark-dim);transition:background .15s,color .15s}
.domain-switch a:hover{color:#fff}
.domain-switch .ds-current{background:rgba(255,255,255,.14);color:#fff}
.domain-switch .ds-scuola{background:var(--green-soft);color:var(--green-deep)}
.domain-switch .ds-scuola:hover{background:var(--green);color:#fff}
.domain-switch .ds-impresa{background:var(--blue-soft);color:var(--blue-deep)}
.domain-switch .ds-impresa:hover{background:var(--blue);color:#fff}