/* ============================================================
   eServer — eserver.it
   Design: «il reattore» — tema unico Acciaio (bianco tecnico + blu elettrico); i temi alternativi del test tavolozze vivono nella storia git.
   Display: Unbounded · Body: Schibsted Grotesk · Data: IBM Plex Mono
   ============================================================ */

/* ---------- Font (self-hosted, OFL) ---------- */
@font-face{font-family:'Unbounded';font-style:normal;font-weight:200 900;font-display:swap;
  src:url('../fonts/unbounded-var.woff2') format('woff2');}
@font-face{font-family:'Schibsted Grotesk';font-style:normal;font-weight:400 900;font-display:swap;
  src:url('../fonts/schibstedgrotesk-var.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/ibmplexmono-400.woff2') format('woff2');}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;
  src:url('../fonts/ibmplexmono-500.woff2') format('woff2');}

/* ---------- Token (default = Acciaio: bianco tecnico, blu elettrico) ---------- */
:root{
  --bg:#f4f7fb;
  --bg-2:#eaf0f7;
  --bg-3:#ffffff;
  --line:#d2dce9;
  --line-soft:#dee7f1;
  --text:#0f1b2d;
  --muted:#49596f;
  --faint:#758498;
  --core:#1d5bd8;
  --core-2:#0c7ab7;
  --led:#0d9d66;
  --focus:#123f9e;
  /* token derivati (temizzabili): superfici traslucide, glow, canvas reattore */
  --btn-core-text:#ffffff;
  --ink-on-core:#ffffff;
  --btn-inset:#ffffff2e;
  --btn-inset-hover:#ffffff55;
  --core-glow-40:#1d5bd844;
  --core-glow-60:#1d5bd866;
  --led-glow:#0d9d6666;
  --led-glow-soft:#0d9d6655;
  --hero-tint1:#1d5bd826;
  --hero-tint2:#0c7ab714;
  --vignette-strong:#f4f7fbcc;
  --vignette-soft:#f4f7fb40;
  --chip-bg:#ffffffaa;
  --ghost-bg:#ffffff88;
  --rail-dot:#b9c7da;
  --em-glow:#1d5bd833;
  --cta-tint1:#1d5bd81f;
  --cta-tint2:#0c7ab71a;
  --unit-glow:#1d5bd824;
  --unit-border-hover:#1d5bd866;
  --rx-blend:source-over;
  --rx-warm:29,91,216;
  --rx-hot:12,122,183;
  --rx-nucleus:150,196,255;
  --rx-glow1:90,140,240;
  --rx-glow2:40,110,220;
  --rx-glow3:12,122,183;
  --rx-dust:90,110,140;
  --rx-trace:29,91,216;
  --rx-trace-alpha:0.14;
  --font-display:'Unbounded', system-ui, sans-serif;
  --font-body:'Schibsted Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, 'Cascadia Mono', monospace;
  --w:1160px;
  --radius:14px;
}

/* ---------- Reset minimo ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.7;
  text-align:left;               /* regola portfolio: mai justify */
  overflow-wrap:break-word;
  -webkit-font-smoothing:antialiased;
}
img,svg,canvas{max-width:100%;display:block;}
a{color:var(--core);text-decoration:none;}
a:hover{text-decoration:underline;text-underline-offset:3px;}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:4px;}
::selection{background:var(--core);color:var(--ink-on-core);}

h1,h2,h3{font-family:var(--font-display);font-weight:600;line-height:1.15;
  letter-spacing:-0.01em;margin:0 0 1rem;text-wrap:balance;}
p{margin:0 0 1rem;}

.wrap{max-width:var(--w);margin:0 auto;padding:0 clamp(1.1rem,4vw,2rem);}
section[id]{scroll-margin-top:76px;}

/* eyebrow mono */
.eyebrow{
  font-family:var(--font-mono);font-weight:500;font-size:.78rem;
  letter-spacing:.16em;text-transform:uppercase;color:var(--core);
  display:flex;align-items:center;gap:.6rem;margin-bottom:1.1rem;
}
.eyebrow::before{content:'';width:26px;height:1px;background:var(--core);opacity:.7;}

/* ---------- Skip link ---------- */
.skip{position:absolute;left:-9999px;top:0;background:var(--core);color:var(--ink-on-core);
  padding:.6rem 1rem;z-index:100;border-radius:0 0 8px 0;font-weight:700;}
.skip:focus{left:0;}

/* ---------- Header ---------- */
.site-head{
  position:fixed;inset:0 0 auto 0;z-index:50;
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s;
}
.site-head.scrolled{
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-color:var(--line);
}
.site-head .wrap{display:flex;align-items:center;gap:1.5rem;height:64px;}
.brand{display:flex;align-items:center;gap:.6rem;color:var(--text);font-family:var(--font-display);
  font-weight:700;font-size:1.05rem;letter-spacing:.01em;}
.brand:hover{text-decoration:none;}
.brand svg{width:26px;height:26px;}
.brand svg g{stroke:var(--core);}
.brand svg circle{fill:var(--core-2);}
.brand b{color:var(--core);font-weight:700;}
.site-nav{margin-left:auto;display:flex;align-items:center;gap:1.4rem;}
.site-nav a{
  font-family:var(--font-mono);font-size:.8rem;letter-spacing:.08em;
  color:var(--muted);text-transform:lowercase;
}
.site-nav a:hover{color:var(--text);text-decoration:none;}
.status-pill{
  display:flex;align-items:center;gap:.5rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;padding:.35rem .8rem;
  background:var(--bg-2);white-space:nowrap;
}
.led{width:7px;height:7px;border-radius:50%;background:var(--led);
  box-shadow:0 0 8px 1px var(--led-glow);animation:led 2.6s infinite;}
@keyframes led{0%,100%{opacity:1}50%{opacity:.35}}
@media (max-width:760px){
  .site-nav a{display:none;}
  .site-nav .status-pill{display:flex;}
}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:100svh;display:flex;flex-direction:column;
  justify-content:center;overflow:hidden;
  background:
    radial-gradient(1000px 520px at 72% 30%, var(--hero-tint1), transparent 65%),
    radial-gradient(700px 480px at 18% 82%, var(--hero-tint2), transparent 60%),
    var(--bg);
}
#reactor{position:absolute;inset:0;width:100%;height:100%;}
.hero::after{ /* vignette per leggibilità testo */
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 90% at 30% 60%, var(--vignette-strong) 0%, var(--vignette-soft) 45%, transparent 70%);
}
.hero > .wrap{position:relative;z-index:2;padding-top:7rem;padding-bottom:2rem;}
.hero h1{
  font-size:clamp(1.9rem, 4.6vw, 3.4rem);
  font-weight:700;max-width:21ch;margin-bottom:1.4rem;
}
.hero h1 em{font-style:normal;color:var(--core);
  text-shadow:0 0 34px var(--em-glow);}
.hero .sub{max-width:52ch;color:var(--muted);font-size:clamp(1.02rem,1.5vw,1.18rem);
  margin-bottom:2.2rem;}
.cta-row{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;}

.btn{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--font-mono);font-weight:500;font-size:.92rem;letter-spacing:.02em;
  padding:.95rem 1.6rem;border-radius:10px;border:1px solid transparent;
  transition:transform .2s, box-shadow .2s, background .2s, border-color .2s;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn-core{
  background:linear-gradient(120deg, var(--core), var(--core-2));
  color:var(--btn-core-text);font-weight:500;
  box-shadow:0 6px 30px -6px var(--core-glow-40), inset 0 0 0 1px var(--btn-inset);
}
.btn-core:hover{box-shadow:0 10px 40px -6px var(--core-glow-60), inset 0 0 0 1px var(--btn-inset-hover);}
.btn-ghost{border-color:var(--line);color:var(--text);background:var(--ghost-bg);}
.btn-ghost:hover{border-color:var(--core);color:var(--core);}

/* strip metriche */
.hero .metrics{margin-top:auto;}
.metrics{
  position:relative;z-index:2;border-top:1px solid var(--line);
  background:color-mix(in srgb, var(--bg-2) 72%, transparent);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.metrics .wrap{
  display:grid;grid-template-columns:repeat(4,1fr);
}
.metric{
  padding:1.3rem 1rem 1.2rem 0;border-left:1px solid var(--line);
  padding-left:1.4rem;
}
.metric:first-child{border-left:0;padding-left:0;}
.metric .val{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(1.3rem,2.4vw,1.9rem);color:var(--text);
}
.metric .val i{font-style:normal;color:var(--core);}
.metric .lbl{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--faint);margin-top:.25rem;
}
@media (max-width:760px){
  .metrics .wrap{grid-template-columns:1fr 1fr;}
  .metric{border-left:0;padding-left:0;}
}

/* ---------- Sezioni ---------- */
.section{padding:clamp(4.5rem,9vw,7.5rem) 0;}
.section-head{max-width:62ch;margin-bottom:clamp(2.2rem,5vw,3.6rem);}
.section-head h2{font-size:clamp(1.5rem,3vw,2.3rem);}
.section-head p{color:var(--muted);}

/* ---------- Rack servizi ---------- */
.rack{
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg, var(--bg-2), var(--bg));
  padding:.65rem;position:relative;
}
.rack-unit{
  position:relative;display:grid;
  grid-template-columns:26px 88px minmax(220px,1.1fr) 1.6fr 26px;
  gap:1.4rem;align-items:start;
  padding:1.6rem 1rem;margin:.35rem 0;border-radius:10px;
  border:1px solid var(--line-soft);
  background:color-mix(in srgb, var(--bg-3) 55%, transparent);
  transition:border-color .25s, background .25s, transform .25s, box-shadow .25s;
}
.rack-unit:hover{
  border-color:var(--unit-border-hover);background:var(--bg-3);
  transform:translateY(-2px);
  box-shadow:0 14px 44px -18px var(--unit-glow);
}
/* guide di montaggio laterali */
.rail{
  align-self:stretch;border-radius:4px;
  background-image:radial-gradient(circle, var(--rail-dot) 1.6px, transparent 2px);
  background-size:8px 14px;background-position:center;background-repeat:repeat-y;
  opacity:.8;
}
.u-no{
  font-family:var(--font-mono);font-weight:500;font-size:.8rem;color:var(--faint);
  letter-spacing:.1em;padding-top:.35rem;display:flex;flex-direction:column;gap:.55rem;
}
.u-no .u-led{width:8px;height:8px;border-radius:50%;background:var(--led);
  box-shadow:0 0 9px 1px var(--led-glow-soft);animation:led 3.4s infinite;}
.rack-unit:hover .u-led{background:var(--core);box-shadow:0 0 10px 2px var(--core-glow-60);
  animation-duration:.9s;}
.rack-unit h3{font-size:1.12rem;font-weight:600;margin:0 0 .35rem;}
.rack-unit .tag{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.06em;
  color:var(--core);margin:0;}
.rack-unit .desc{color:var(--muted);font-size:.98rem;margin:0 0 .9rem;}
.chips{display:flex;flex-wrap:wrap;gap:.45rem;margin:0;padding:0;list-style:none;}
.chips li{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.03em;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;padding:.3rem .6rem;
  background:var(--chip-bg);white-space:nowrap;
}
@media (max-width:920px){
  .rack-unit{grid-template-columns:64px 1fr;grid-template-rows:auto auto;}
  .rail{display:none;}
  .rack-unit > div:nth-of-type(2){grid-column:2;}
  .rack-unit > div:last-of-type{grid-column:1 / -1;}
}
@media (max-width:560px){
  .rack-unit{grid-template-columns:1fr;padding:1.3rem 1.1rem;}
  .chips li{white-space:normal;overflow-wrap:anywhere;}
  .u-no{flex-direction:row;align-items:center;padding-top:0;}
  .rack-unit > div:nth-of-type(2){grid-column:1;}
}

/* ---------- Perché ---------- */
.why-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.2rem,3vw,2.2rem);
}
.why{
  position:relative;padding:.4rem 0 .4rem 1.5rem;
}
/* marker LED (linguaggio del rack) al posto del filetto colorato */
.why::before{
  content:'';position:absolute;left:0;top:.78rem;width:8px;height:8px;
  border-radius:50%;background:var(--core);box-shadow:0 0 9px 1px var(--core-glow-40);
}
.why h3{font-size:1.02rem;margin-bottom:.5rem;}
.why p{color:var(--muted);font-size:.98rem;margin:0;}
@media (max-width:760px){.why-grid{grid-template-columns:1fr;}}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:820px;}
.faq-list details{border-bottom:1px solid var(--line);}
.faq-list summary{
  cursor:pointer;list-style:none;display:flex;align-items:baseline;gap:1rem;
  padding:1.25rem .2rem;font-weight:700;font-size:1.02rem;
  transition:color .2s;
}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-list summary::before{
  content:'+';font-family:var(--font-mono);color:var(--core);
  font-size:1.05rem;flex:0 0 auto;transition:transform .25s;transform-origin:center;
}
.faq-list details[open] summary::before{transform:rotate(45deg);}
.faq-list summary:hover{color:var(--core);}
.faq-list .a{padding:0 .2rem 1.35rem 2.1rem;color:var(--muted);font-size:.99rem;}
.faq-list .a p{margin:0;}

/* ---------- CTA ---------- */
.cta{
  position:relative;text-align:center;overflow:hidden;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:
    radial-gradient(640px 300px at 50% 115%, var(--cta-tint1), transparent 70%),
    radial-gradient(900px 420px at 50% 130%, var(--cta-tint2), transparent 70%),
    var(--bg-2);
}
.cta .wrap{max-width:760px;}
.cta h2{font-size:clamp(1.6rem,3.4vw,2.5rem);}
.cta p{color:var(--muted);max-width:48ch;margin:0 auto 2rem;}
.cta .eyebrow{justify-content:center;}
.cta .eyebrow::before,.cta .eyebrow::after{content:'';width:26px;height:1px;
  background:var(--core);opacity:.7;}
.cta-mail{font-family:var(--font-mono);font-size:.85rem;color:var(--faint);
  margin-top:1.2rem;}

/* ---------- Footer ---------- */
.site-foot{padding:3rem 0 2.5rem;}
.foot-top{display:flex;flex-wrap:wrap;gap:1.5rem;align-items:center;
  justify-content:space-between;margin-bottom:1.8rem;}
.foot-nav{display:flex;flex-wrap:wrap;gap:1.3rem;}
/* padding+margin negativo: area tap ≥44px senza cambiare il layout visivo */
.foot-nav a{font-family:var(--font-mono);font-size:.78rem;color:var(--muted);
  padding:.8rem .5rem;margin:-.8rem -.5rem;}
.foot-nav a:hover{color:var(--core);}
.legal-entity{
  border-top:1px solid var(--line);padding-top:1.6rem;
  color:var(--muted);font-size:.82rem;line-height:1.65;
}
.legal-entity a{color:var(--muted);}

/* ---------- Pagine legali ---------- */
.legal-page{max-width:780px;margin:0 auto;padding:8rem 0 4rem;}
.legal-page h1{font-size:clamp(1.7rem,3.4vw,2.4rem);margin-bottom:2rem;}
.legal-page h2{font-size:1.15rem;margin:2.4rem 0 .8rem;}
.legal-page p,.legal-page li{color:var(--muted);font-size:.99rem;}
.legal-page ul{padding-left:1.3rem;}
.legal-page strong{color:var(--text);}

/* ---------- Scelta statistiche (id neutri esc-*, vedi main.js) ---------- */
#escBox{
  position:fixed;left:1rem;bottom:1rem;z-index:95;max-width:340px;
  background:var(--bg-3);border:1px solid var(--line);border-radius:12px;
  padding:1.1rem 1.2rem;box-shadow:0 18px 50px -18px var(--core-glow-40);
}
#escBox .esc-txt{font-size:.88rem;color:var(--muted);margin:0 0 .8rem;}
#escBox .esc-row{display:flex;gap:.5rem;}
.esc-btn{
  font-family:var(--font-mono);font-size:.8rem;cursor:pointer;
  border-radius:8px;padding:.55rem 1rem;border:1px solid var(--line);
  background:var(--bg-2);color:var(--text);
}
.esc-btn.esc-ok{
  background:linear-gradient(120deg, var(--core), var(--core-2));
  color:var(--btn-core-text);border-color:transparent;font-weight:500;
}
.esc-btn:hover{filter:brightness(1.06);}
@media (max-width:560px){#escBox{left:.7rem;right:.7rem;max-width:none;}}

/* ---------- Reveal on scroll ---------- */
/* :where() = specificità zero: così .rv.in (0,2,0) vince sempre sul gate js */
:where(html.js) .rv{opacity:0;transform:translateY(22px);
  transition:opacity .7s cubic-bezier(.2,.6,.2,1), transform .7s cubic-bezier(.2,.6,.2,1);}
.rv.in{opacity:1;transform:none;}
.rv-d1{transition-delay:.08s;} .rv-d2{transition-delay:.16s;} .rv-d3{transition-delay:.24s;}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;}
  .rv{opacity:1;transform:none;}
  #reactor{display:none;}
}