/* =========================================================================
   AI Sul Serio — Hub «Smetti di Chattare con l'AI» (Collana AI Operativa · Vol.4)
   Design system coerente con copertina/interno del libro.
   Blu notte #0B1B34 · Arancio Otto #FF7A1A · Ciano #2BD9D9 · Verde #2E8B57
   Font: Space Grotesk (display) · Inter (UI) · Source Serif 4 (testo) · JetBrains Mono (codice)
   ========================================================================= */

/* ---------- TOKENS: tema scuro (identità di default = blu notte) ---------- */
:root{
  --bg:#0B1B34;
  --bg-2:#0a1730;
  --glow-1:rgba(255,122,26,.18);
  --glow-2:rgba(43,217,217,.16);
  --panel:#0F2143;
  --panel-2:#132a52;
  --panel-3:#16305c;
  --ink:#EDF2FB;
  --ink-2:#AEBFDB;
  --ink-3:#728AB0;
  --line:rgba(150,180,225,.15);
  --line-2:rgba(150,180,225,.08);
  --brand:#FF7A1A;
  --brand-2:#ff8f3d;
  --on-brand:#160b02;
  --cyan:#2BD9D9;
  --green:#37c47f;
  --amber:#f2a83b;
  --red:#ef6a52;
  --serif-ink:#D9E3F4;
  --shadow:0 24px 60px -24px rgba(0,0,0,.65);
  --shadow-sm:0 8px 24px -12px rgba(0,0,0,.55);
  --radius:16px;
  --radius-sm:11px;
  --grid-line:rgba(150,180,225,.05);
  --hero-node:rgba(174,191,219,.55);
  color-scheme:dark;
}

/* ---------- TOKENS: tema chiaro ---------- */
:root[data-theme="light"]{
  --bg:#F4EEE3;
  --bg-2:#efe7d8;
  --glow-1:rgba(232,114,12,.14);
  --glow-2:rgba(18,139,139,.10);
  --panel:#FFFFFF;
  --panel-2:#FBF6EC;
  --panel-3:#F5EEE0;
  --ink:#0B1B34;
  --ink-2:#42506A;
  --ink-3:#6D7C96;
  --line:rgba(11,27,52,.14);
  --line-2:rgba(11,27,52,.07);
  --brand:#E8720C;
  --brand-2:#d1660a;
  --on-brand:#ffffff;
  --cyan:#0f8a8a;
  --green:#2E8B57;
  --amber:#b0781a;
  --red:#B03A2E;
  --serif-ink:#24344f;
  --shadow:0 24px 55px -26px rgba(24,40,72,.35);
  --shadow-sm:0 10px 26px -16px rgba(24,40,72,.30);
  --grid-line:rgba(11,27,52,.045);
  --hero-node:rgba(11,27,52,.35);
  color-scheme:light;
}
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]){
    --bg:#F4EEE3;--bg-2:#efe7d8;--glow-1:rgba(232,114,12,.14);--glow-2:rgba(18,139,139,.10);
    --panel:#FFFFFF;--panel-2:#FBF6EC;--panel-3:#F5EEE0;--ink:#0B1B34;--ink-2:#42506A;--ink-3:#6D7C96;
    --line:rgba(11,27,52,.14);--line-2:rgba(11,27,52,.07);--brand:#E8720C;--brand-2:#d1660a;--on-brand:#fff;
    --cyan:#0f8a8a;--green:#2E8B57;--amber:#b0781a;--red:#B03A2E;--serif-ink:#24344f;
    --shadow:0 24px 55px -26px rgba(24,40,72,.35);--shadow-sm:0 10px 26px -16px rgba(24,40,72,.30);
    --grid-line:rgba(11,27,52,.045);--hero-node:rgba(11,27,52,.35);color-scheme:light;
  }
}

/* ---------- RESET & BASE ---------- */
*{box-sizing:border-box}
*::selection{background:var(--brand);color:var(--on-brand)}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;
  font-feature-settings:"cv05","ss01";
  overflow-x:hidden;
}
/* atmosfera: mesh glow + griglia tecnica */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(60vw 50vh at 82% -8%,var(--glow-1),transparent 60%),
    radial-gradient(52vw 46vh at 8% 6%,var(--glow-2),transparent 62%),
    linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(120vw 120vh at 50% 0%,#000 40%,transparent 92%);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:"Space Grotesk","Inter",sans-serif;font-weight:600;line-height:1.08;margin:0;letter-spacing:-.02em}
p{margin:0 0 1rem}
:focus-visible{outline:2.5px solid var(--brand);outline-offset:3px;border-radius:6px}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
.wrap{width:min(1160px,92vw);margin-inline:auto}
.narrow{width:min(820px,92vw);margin-inline:auto}
.mono{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace}
.serif{font-family:"Source Serif 4",Georgia,serif}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
[hidden]{display:none!important}

/* ---------- HEADER ---------- */
.site-header{position:sticky;top:0;z-index:60;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--bg) 78%,transparent);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:1.2rem;height:66px}
.brand{display:flex;align-items:center;gap:.62rem;font-family:"Space Grotesk",sans-serif;font-weight:700;letter-spacing:-.01em;font-size:1.02rem;white-space:nowrap}
.brand .mark{width:30px;height:30px;flex:0 0 auto;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 6px 16px -6px var(--brand)}
.brand .mark svg{width:18px;height:18px;display:block}
.brand small{display:block;font-family:"Inter";font-weight:600;font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-top:1px}
.brand b{display:block;line-height:1}
.nav-links{display:flex;align-items:center;gap:.35rem;margin-left:auto}
.nav-links a{padding:.5rem .8rem;border-radius:9px;font-weight:500;font-size:.94rem;color:var(--ink-2);transition:color .15s,background .15s}
.nav-links a:hover{color:var(--ink);background:var(--line-2)}
.nav-links a.active{color:var(--ink);background:var(--line-2)}
.nav-links a.active{box-shadow:inset 0 -2px 0 var(--brand)}
.header-tools{display:flex;align-items:center;gap:.5rem;margin-left:.4rem}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--panel);
  color:var(--ink-2);display:grid;place-items:center;cursor:pointer;transition:.15s}
.icon-btn:hover{color:var(--ink);border-color:var(--brand);transform:translateY(-1px)}
.icon-btn svg{width:19px;height:19px}
.theme-toggle .moon{display:none}
:root[data-theme="light"] .theme-toggle .sun{display:none}
:root[data-theme="light"] .theme-toggle .moon{display:block}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .theme-toggle .sun{display:none}:root:not([data-theme="dark"]) .theme-toggle .moon{display:block}}
.menu-btn{display:none}
.nav-links.mobile-open{display:flex}
@media (max-width:820px){
  .nav-links{position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:stretch;gap:.2rem;
    background:var(--bg);border-bottom:1px solid var(--line);padding:.7rem 4vw 1.1rem;margin:0;display:none;box-shadow:var(--shadow)}
  .nav-links a{padding:.85rem 1rem;font-size:1.05rem}
  .nav-links a.active{box-shadow:inset 3px 0 0 var(--brand)}
  .menu-btn{display:grid}
  .header-tools{margin-left:auto}
  .brand small{display:none}
}

/* ---------- BUTTONS ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.72rem 1.15rem;border-radius:11px;
  font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:.96rem;cursor:pointer;border:1px solid transparent;
  transition:transform .15s,box-shadow .15s,background .15s,border-color .15s;white-space:nowrap;letter-spacing:-.01em}
.btn svg{width:18px;height:18px;flex:0 0 auto}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:var(--on-brand);box-shadow:0 12px 28px -12px var(--brand)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px -12px var(--brand)}
.btn-ghost{background:var(--panel);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);transform:translateY(-2px);color:var(--ink)}
.btn-cyan{background:transparent;border-color:var(--cyan);color:var(--cyan)}
.btn-cyan:hover{background:color-mix(in srgb,var(--cyan) 14%,transparent);transform:translateY(-2px)}
.btn-sm{padding:.5rem .85rem;font-size:.86rem;border-radius:9px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none!important}

/* ---------- KICKER / EYEBROW ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-family:"Inter";font-weight:700;
  font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--brand)}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px}
.section-head{max-width:640px}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.5rem);margin:.7rem 0 .5rem}
.section-head p{color:var(--ink-2);font-size:1.06rem}
section{padding:clamp(3.2rem,7vw,5.5rem) 0}

/* ---------- HERO ---------- */
.hero{position:relative;padding:clamp(2.4rem,6vw,4.6rem) 0 clamp(2.6rem,6vw,4.2rem);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(1.5rem,4vw,3.4rem);align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:.55rem;padding:.4rem .8rem .4rem .5rem;border-radius:100px;
  background:var(--panel);border:1px solid var(--line);font-size:.8rem;font-weight:600;color:var(--ink-2)}
.hero-badge .dot{width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  display:grid;place-items:center;color:var(--on-brand);font-size:.62rem;font-weight:800}
.hero h1{font-size:clamp(2.35rem,6vw,4.15rem);letter-spacing:-.035em;margin:1.1rem 0 0}
.hero h1 .accent{color:var(--brand);position:relative;white-space:nowrap}
.hero .lede{font-family:"Source Serif 4",serif;color:var(--serif-ink);font-size:clamp(1.08rem,1.9vw,1.32rem);
  line-height:1.5;margin:1.15rem 0 0;max-width:33ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.7rem}
.hero-meta{display:flex;flex-wrap:wrap;gap:1.5rem;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--line)}
.hero-meta div{min-width:74px}
.hero-meta b{font-family:"Space Grotesk";font-size:1.55rem;color:var(--ink);display:block;line-height:1}
.hero-meta span{font-size:.78rem;color:var(--ink-3);text-transform:uppercase;letter-spacing:.08em;font-weight:600}
.hero-art{position:relative;display:grid;place-items:center;min-height:340px}
.hero-art .otto{position:relative;z-index:2;width:min(360px,78%);filter:drop-shadow(0 30px 50px rgba(0,0,0,.45))}
.hero-nodes{position:absolute;inset:-6% -4%;z-index:1;opacity:.9}
.hero-nodes svg{width:100%;height:100%}
.node-dot{fill:var(--brand)}
.node-ring{fill:none;stroke:var(--cyan);stroke-width:1.4;opacity:.55}
.flow-line{fill:none;stroke:var(--hero-node);stroke-width:1.4;stroke-dasharray:5 9;opacity:.6;
  animation:flow 3.2s linear infinite}
.flow-line.c{stroke:var(--cyan);opacity:.7}
@keyframes flow{to{stroke-dashoffset:-56}}
.pulse{transform-box:fill-box;transform-origin:center;animation:pulse 3s ease-in-out infinite}
.pulse.d2{animation-delay:.8s}.pulse.d3{animation-delay:1.5s}.pulse.d4{animation-delay:2.1s}
@keyframes pulse{0%,100%{opacity:.4;transform:scale(.85)}50%{opacity:1;transform:scale(1.12)}}
@media (prefers-reduced-motion:reduce){.flow-line,.pulse{animation:none}}
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr;text-align:left}
  .hero-art{grid-row:1;min-height:230px}
  .hero-art .otto{width:min(230px,52%)}
}

/* reveal on load */
.reveal{opacity:0;transform:translateY(14px);animation:reveal .7s cubic-bezier(.2,.7,.2,1) forwards}
.reveal.r2{animation-delay:.09s}.reveal.r3{animation-delay:.18s}.reveal.r4{animation-delay:.27s}.reveal.r5{animation-delay:.36s}
@keyframes reveal{to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.reveal{animation:none;opacity:1;transform:none}}

/* ---------- SEARCH (hero + flussi) ---------- */
.searchbar{position:relative;display:flex;align-items:center;gap:.6rem;background:var(--panel);
  border:1px solid var(--line);border-radius:13px;padding:.2rem .3rem .2rem .95rem;box-shadow:var(--shadow-sm)}
.searchbar:focus-within{border-color:var(--brand)}
.searchbar svg{width:19px;height:19px;color:var(--ink-3);flex:0 0 auto}
.searchbar input{flex:1;background:transparent;border:0;outline:0;color:var(--ink);font:inherit;font-size:1rem;padding:.62rem 0}
.searchbar input::placeholder{color:var(--ink-3)}

/* ---------- CARDS (generiche) ---------- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow-sm)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.1rem}
@media (max-width:820px){.grid-3{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}}
.feature{position:relative;overflow:hidden}
.feature .fi{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;margin-bottom:.9rem;
  background:color-mix(in srgb,var(--brand) 15%,transparent);color:var(--brand)}
.feature .fi.cy{background:color-mix(in srgb,var(--cyan) 15%,transparent);color:var(--cyan)}
.feature .fi.gr{background:color-mix(in srgb,var(--green) 16%,transparent);color:var(--green)}
.feature h3{font-size:1.16rem;margin-bottom:.4rem}
.feature p{color:var(--ink-2);font-size:.96rem;margin:0}

/* ---------- PILLS ---------- */
.pill{display:inline-flex;align-items:center;gap:.34rem;padding:.24rem .6rem;border-radius:100px;
  font-size:.74rem;font-weight:700;letter-spacing:.01em;border:1px solid transparent;white-space:nowrap;line-height:1.3}
.pill .pd{width:7px;height:7px;border-radius:50%;background:currentColor}
.pill-cost-gratis{color:var(--green);background:color-mix(in srgb,var(--green) 13%,transparent);border-color:color-mix(in srgb,var(--green) 30%,transparent)}
.pill-cost-freemium{color:var(--cyan);background:color-mix(in srgb,var(--cyan) 13%,transparent);border-color:color-mix(in srgb,var(--cyan) 30%,transparent)}
.pill-cost-pagamento{color:var(--amber);background:color-mix(in srgb,var(--amber) 14%,transparent);border-color:color-mix(in srgb,var(--amber) 32%,transparent)}
.pill-diff-1{color:var(--green);background:color-mix(in srgb,var(--green) 12%,transparent)}
.pill-diff-2{color:var(--amber);background:color-mix(in srgb,var(--amber) 13%,transparent)}
.pill-diff-3{color:var(--red);background:color-mix(in srgb,var(--red) 13%,transparent)}
.pill-diff-4{color:var(--ink-2);background:var(--line-2)}
.pill-stack{color:var(--ink-2);background:var(--line-2);border-color:var(--line);font-family:"JetBrains Mono",monospace;font-size:.7rem;font-weight:600}

/* ---------- FLUSSI: toolbar filtri ---------- */
.flow-toolbar{position:sticky;top:66px;z-index:40;padding:1rem 0;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line-2);margin-bottom:1.6rem}
.filter-row{display:flex;flex-wrap:wrap;gap:.9rem 1.3rem;align-items:flex-end;margin-top:1rem}
.filter-group{display:flex;flex-direction:column;gap:.42rem}
.filter-group>label{font-size:.68rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.chips{display:flex;flex-wrap:wrap;gap:.4rem}
.chip{padding:.36rem .72rem;border-radius:100px;border:1px solid var(--line);background:var(--panel);
  color:var(--ink-2);font-size:.82rem;font-weight:600;cursor:pointer;transition:.14s;white-space:nowrap}
.chip:hover{border-color:var(--brand);color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}
.chip.cyan[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:var(--on-brand)}
.flow-count{margin-left:auto;font-size:.9rem;color:var(--ink-3);font-weight:600;align-self:center}
.flow-count b{color:var(--ink);font-family:"Space Grotesk"}
.reset-link{background:none;border:0;color:var(--brand);font:inherit;font-weight:600;font-size:.85rem;cursor:pointer;padding:.3rem}
.reset-link:hover{text-decoration:underline}

/* ---------- FLUSSI: griglia schede ---------- */
.flows{display:grid;grid-template-columns:repeat(auto-fill,minmax(305px,1fr));gap:1.1rem}
.flow-card{position:relative;text-align:left;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.25rem;cursor:pointer;display:flex;flex-direction:column;gap:.8rem;transition:transform .16s,border-color .16s,box-shadow .16s;overflow:hidden}
.flow-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);opacity:0;transition:.16s}
.flow-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--brand) 45%,var(--line));box-shadow:var(--shadow)}
.flow-card:hover::before{opacity:1}
.flow-card:focus-visible{outline-offset:-2px}
.fc-top{display:flex;align-items:center;justify-content:space-between;gap:.6rem}
.fc-id{font-family:"JetBrains Mono";font-size:.76rem;font-weight:700;color:var(--ink-3);letter-spacing:.04em}
.fc-fam{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.09em;color:var(--brand)}
.flow-card h3{font-size:1.1rem;line-height:1.25;letter-spacing:-.01em}
.fc-why{color:var(--ink-2);font-size:.9rem;line-height:1.5;margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.fc-tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:auto;padding-top:.3rem}
.fc-arrow{position:absolute;right:1.1rem;bottom:1.1rem;color:var(--ink-3);opacity:0;transform:translateX(-4px);transition:.16s}
.flow-card:hover .fc-arrow{opacity:1;transform:none;color:var(--brand)}
.empty-state{text-align:center;padding:4rem 1rem;color:var(--ink-3)}
.empty-state img{width:120px;margin:0 auto 1rem;opacity:.85}

/* ---------- MODALE DETTAGLIO FLUSSO ---------- */
.modal-backdrop{position:fixed;inset:0;z-index:100;background:rgba(6,14,28,.62);backdrop-filter:blur(4px);
  display:flex;justify-content:flex-end;opacity:0;pointer-events:none;transition:opacity .25s}
.modal-backdrop.open{opacity:1;pointer-events:auto}
.sheet{width:min(620px,100%);height:100%;overflow-y:auto;background:var(--bg);border-left:1px solid var(--line);
  box-shadow:var(--shadow);transform:translateX(24px);transition:transform .28s cubic-bezier(.2,.7,.2,1);
  scrollbar-width:thin}
.modal-backdrop.open .sheet{transform:none}
.sheet-head{position:sticky;top:0;z-index:2;background:color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding:1.1rem clamp(1.2rem,3vw,2rem);
  display:flex;align-items:flex-start;justify-content:space-between;gap:1rem}
.sheet-head .fc-id{margin-bottom:.35rem;display:block}
.sheet-head h2{font-size:1.4rem;line-height:1.15;letter-spacing:-.02em;max-width:42ch}
.sheet-body{padding:clamp(1.2rem,3vw,2rem)}
.sheet-tags{display:flex;flex-wrap:wrap;gap:.45rem;margin:1.1rem 0 1.4rem}
.sheet-section{margin:1.5rem 0}
.sheet-section>h4{font-family:"Inter";font-size:.72rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:.6rem;display:flex;align-items:center;gap:.5rem}
.sheet-section>h4 svg{width:15px;height:15px;color:var(--brand)}
.sheet-lede{font-family:"Source Serif 4",serif;font-size:1.12rem;line-height:1.55;color:var(--serif-ink)}
.steps{list-style:none;counter-reset:s;padding:0;margin:0;display:flex;flex-direction:column;gap:.55rem}
.steps li{counter-increment:s;position:relative;padding:.75rem .9rem .75rem 3rem;background:var(--panel);
  border:1px solid var(--line-2);border-radius:11px;font-size:.94rem;line-height:1.5;color:var(--ink)}
.steps li::before{content:counter(s);position:absolute;left:.7rem;top:.7rem;width:24px;height:24px;border-radius:7px;
  background:color-mix(in srgb,var(--brand) 16%,transparent);color:var(--brand);font-family:"Space Grotesk";
  font-weight:700;font-size:.82rem;display:grid;place-items:center}
.steps li.human{border-color:color-mix(in srgb,var(--green) 40%,transparent);background:color-mix(in srgb,var(--green) 8%,var(--panel))}
.steps li.human::before{background:color-mix(in srgb,var(--green) 20%,transparent);color:var(--green)}
.callout{border-radius:12px;padding:.95rem 1.1rem;font-size:.94rem;line-height:1.55;border:1px solid var(--line)}
.callout.warn{background:color-mix(in srgb,var(--amber) 9%,var(--panel));border-color:color-mix(in srgb,var(--amber) 32%,transparent)}
.callout.ok{background:color-mix(in srgb,var(--green) 9%,var(--panel));border-color:color-mix(in srgb,var(--green) 30%,transparent)}
.callout.info{background:var(--panel)}
.callout b{color:var(--ink)}
.callout .ct{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:.35rem}
.callout.warn .ct{color:var(--amber)}.callout.ok .ct{color:var(--green)}
.kv{display:flex;flex-wrap:wrap;gap:.4rem .5rem;font-size:.9rem;color:var(--ink-2)}
.kv .k{color:var(--ink-3);font-weight:600}
.tested{display:inline-flex;align-items:center;gap:.5rem;font-size:.82rem;font-weight:600;padding:.3rem .7rem;border-radius:8px;background:var(--line-2);color:var(--ink-2)}
.tested .dot{width:8px;height:8px;border-radius:50%}
.tested.ok .dot{background:var(--green)}.tested.ris .dot{background:var(--amber)}.tested.ric .dot{background:var(--cyan)}
.variants{display:flex;flex-wrap:wrap;gap:.4rem}

/* ---------- GATE DOWNLOAD ---------- */
.dl-box{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--panel-2)}
.dl-locked{padding:1.3rem;display:flex;gap:1rem;align-items:flex-start}
.dl-locked .lock-ico{width:42px;height:42px;flex:0 0 auto;border-radius:11px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--brand) 15%,transparent);color:var(--brand)}
.dl-locked h4{font-size:1rem;font-family:"Space Grotesk";margin-bottom:.3rem}
.dl-locked p{font-size:.88rem;color:var(--ink-2);margin:0 0 .8rem}
.dl-form{display:flex;gap:.5rem;flex-wrap:wrap}
.dl-form input{flex:1;min-width:150px;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:.6rem .8rem;
  color:var(--ink);font:inherit;font-family:"JetBrains Mono";letter-spacing:.05em}
.dl-form input:focus{outline:0;border-color:var(--brand)}
.dl-form input.err{border-color:var(--red);animation:shake .35s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
.dl-msg{font-size:.82rem;margin-top:.5rem;min-height:1em}
.dl-msg.bad{color:var(--red)}.dl-msg.good{color:var(--green)}
.dl-unlocked{padding:1.2rem;display:flex;flex-direction:column;gap:.7rem}
.dl-unlocked .dl-file{display:flex;align-items:center;gap:.7rem;font-family:"JetBrains Mono";font-size:.82rem;color:var(--ink-2)}
.dl-actions{display:flex;gap:.6rem;flex-wrap:wrap}
.dl-none{padding:1.1rem;font-size:.9rem;color:var(--ink-2);background:var(--panel-2);border-radius:12px;border:1px dashed var(--line)}
.unlocked-tag{display:inline-flex;align-items:center;gap:.4rem;font-size:.74rem;font-weight:700;color:var(--green)}

/* ---------- TOOL STATUS (stato) ---------- */
.update-banner{display:inline-flex;align-items:center;gap:.6rem;padding:.5rem .9rem;border-radius:100px;
  background:color-mix(in srgb,var(--cyan) 12%,transparent);border:1px solid color-mix(in srgb,var(--cyan) 30%,transparent);
  color:var(--cyan);font-size:.84rem;font-weight:600}
.tool-card{display:flex;flex-direction:column;gap:.7rem}
.tool-card .th{display:flex;align-items:center;justify-content:space-between;gap:.6rem}
.tool-card h3{font-size:1.14rem}
.tool-badge{font-size:.7rem;font-weight:700;padding:.22rem .55rem;border-radius:7px;text-transform:uppercase;letter-spacing:.06em}
.tb-stable{color:var(--green);background:color-mix(in srgb,var(--green) 13%,transparent)}
.tb-watch{color:var(--amber);background:color-mix(in srgb,var(--amber) 13%,transparent)}
.tool-card dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:.35rem .9rem;font-size:.9rem}
.tool-card dt{color:var(--ink-3);font-weight:600}
.tool-card dd{margin:0;color:var(--ink);text-align:right}
.tool-note{font-size:.82rem;color:var(--ink-3);border-top:1px solid var(--line-2);padding-top:.6rem;margin-top:.2rem}

/* ---------- CHANGELOG / ERRATA ---------- */
.timeline{border-left:2px solid var(--line);padding-left:1.5rem;display:flex;flex-direction:column;gap:1.8rem}
.tl-item{position:relative}
.tl-item::before{content:"";position:absolute;left:-1.94rem;top:.35rem;width:12px;height:12px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px var(--bg)}
.tl-item time{font-family:"JetBrains Mono";font-size:.8rem;color:var(--ink-3);font-weight:600}
.tl-item h3{font-size:1.1rem;margin:.25rem 0 .4rem}
.tl-item p{color:var(--ink-2);font-size:.95rem;margin:0}
.tl-tag{display:inline-block;font-size:.68rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;
  padding:.15rem .5rem;border-radius:6px;margin-left:.5rem;vertical-align:middle}
.tl-tag.new{color:var(--green);background:color-mix(in srgb,var(--green) 14%,transparent)}
.tl-tag.fix{color:var(--cyan);background:color-mix(in srgb,var(--cyan) 14%,transparent)}
.errata-table{width:100%;border-collapse:collapse;font-size:.92rem}
.errata-table th,.errata-table td{text-align:left;padding:.8rem .9rem;border-bottom:1px solid var(--line)}
.errata-table th{font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-3);font-weight:700}
.errata-empty{text-align:center;padding:2.5rem 1rem;color:var(--ink-3)}

/* ---------- REDIRECT PAGE ---------- */
.redirect-page{min-height:100vh;display:grid;place-items:center;padding:2rem;text-align:center}
.redirect-card{max-width:520px}
.redirect-card .otto{width:170px;margin:0 auto 1.4rem}
.redirect-card h1{font-size:clamp(1.6rem,4vw,2.3rem);margin-bottom:.8rem}
.redirect-card p{color:var(--ink-2);font-size:1.04rem;margin-bottom:.6rem}
.redirect-card .dest{font-family:"JetBrains Mono";font-size:.86rem;color:var(--ink-3);word-break:break-all;
  background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:.6rem .9rem;margin:1.2rem 0}
.spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--brand);
  margin:1.5rem auto 0;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spinner{animation:none}}

/* ---------- STRIP / CTA band ---------- */
.strip{background:linear-gradient(135deg,var(--panel-2),var(--panel));border:1px solid var(--line);
  border-radius:22px;padding:clamp(2rem,4vw,3rem);position:relative;overflow:hidden}
.strip::after{content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,var(--glow-1),transparent 70%)}
.strip .in{position:relative;z-index:1;display:flex;align-items:center;gap:2rem;flex-wrap:wrap;justify-content:space-between}
.strip h2{font-size:clamp(1.5rem,3vw,2.1rem);max-width:22ch}
.strip .otto{width:120px;flex:0 0 auto}

/* ---------- FAMILY LEGEND (home) ---------- */
.fam-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:.9rem}
.fam-item{display:flex;align-items:center;gap:.85rem;padding:1rem 1.1rem;background:var(--panel);border:1px solid var(--line);
  border-radius:13px;transition:.15s}
.fam-item:hover{border-color:var(--brand);transform:translateY(-2px)}
.fam-item .fn{width:38px;height:38px;flex:0 0 auto;border-radius:10px;display:grid;place-items:center;
  font-family:"Space Grotesk";font-weight:700;color:var(--on-brand);background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.fam-item .fn.c2{background:linear-gradient(135deg,var(--cyan),#1fa9a9)}
.fam-item .fn.c3{background:linear-gradient(135deg,var(--green),#1f7a4b)}
.fam-item .fn.c4{background:linear-gradient(135deg,var(--amber),#c98a26)}
.fam-item .fn.c5{background:linear-gradient(135deg,#6B4FA0,#513a80)}
.fam-item b{display:block;font-size:.98rem;font-family:"Space Grotesk"}
.fam-item span{font-size:.8rem;color:var(--ink-3)}

/* ---------- FOOTER ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:4rem;padding:3rem 0 2rem;background:var(--bg-2)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:2rem}
.foot-brand .brand{margin-bottom:.9rem}
.foot-brand p{color:var(--ink-3);font-size:.9rem;max-width:38ch}
.foot-col h4{font-size:.74rem;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-3);margin-bottom:.9rem;font-family:"Inter";font-weight:700}
.foot-col a{display:block;color:var(--ink-2);font-size:.92rem;padding:.28rem 0;transition:color .14s}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;
  margin-top:2.4rem;padding-top:1.5rem;border-top:1px solid var(--line);color:var(--ink-3);font-size:.82rem}
.foot-bottom .otto{width:34px}
.foot-bottom a{color:var(--ink-3);text-decoration:underline;text-underline-offset:2px}
.foot-bottom a:hover{color:var(--brand)}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}}
@media (max-width:460px){.foot-grid{grid-template-columns:1fr}}

/* utilities */
.mt-0{margin-top:0}.mt-1{margin-top:1rem}.mt-2{margin-top:2rem}.mb-0{margin-bottom:0}
.center{text-align:center}
.lead{font-size:1.1rem;color:var(--ink-2)}
.text-serif{font-family:"Source Serif 4",serif;color:var(--serif-ink);font-size:1.08rem;line-height:1.6}
.divlabel{display:flex;align-items:center;gap:1rem;margin:2.5rem 0 1.4rem}
.divlabel::after{content:"";flex:1;height:1px;background:var(--line)}
.divlabel h2{font-size:1.3rem}