/* ════════════════════════════════════════════════
   techalps — stile condiviso per le landing di servizio
   Estende il sistema visivo del sito (variante dark).
   ════════════════════════════════════════════════ */

:root {
  --ink: #1A1D1F;
  --graphite: #2E3236;
  --stone: #8A8F94;
  --stone-light: #D9D9D6;
  --paper: #F4F2EE;
  --white: #FFFFFF;

  --glacier: #3B6E8F;
  --fir: #2C4A3E;
  --signal: #C84A2E;

  --bg: var(--ink);
  --fg: var(--paper);
  --fg-soft: #B7BBBE;
  --hairline: rgba(244, 242, 238, 0.12);
  --surface: #202427;
  --surface-2: #262b2e;
  --surface-line: rgba(244, 242, 238, 0.14);
  --accent: var(--glacier);
  --accent-bright: #6FA0BE;

  --tracking-wm: -0.04em;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--fg); color: var(--bg); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* rete di punti di sfondo */
#net {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}
.page, .site-footer, .site-header { position: relative; z-index: 1; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 32px; }
@media (min-width: 768px) { .wrap { padding: 0 48px; } }
.wrap--narrow { max-width: 800px; }

/* ─── EYEBROW ─── */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.1em;
  color: var(--stone); text-transform: uppercase; font-weight: 500;
}
.eyebrow::before {
  content: ""; width: 6px; height: 6px; background: var(--accent-bright); flex-shrink: 0;
}

/* ─── HEADER ─── */
.site-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px 32px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500;
}
@media (min-width: 768px) { .site-header { padding: 28px 48px; } }
.site-header .brand {
  font-family: 'Inter', sans-serif; font-weight: 700; font-size: 22px;
  letter-spacing: var(--tracking-wm); text-transform: none;
  display: inline-flex; align-items: baseline;
}
.site-header .brand .dot {
  width: 0.15em; height: 0.15em; background: currentColor;
  display: inline-block; margin-left: 0.08em; align-self: flex-end; margin-bottom: 0.45em;
}
.site-header nav { display: none; gap: 22px; align-items: center; }
.site-header nav a { color: var(--stone); transition: color 0.2s ease; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--fg); }
.lang { display: flex; align-items: center; gap: 6px; padding-left: 18px; border-left: 1px solid var(--surface-line); }
.lang a { color: var(--stone); }
.lang a[aria-current="true"] { color: var(--fg); }
.lang a:hover { color: var(--accent-bright); }
.lang .sep { color: var(--surface-line); }

/* ─── MENU MOBILE (hamburger CSS-only, icona via SVG) ─── */
.nav-toggle { position: absolute; opacity: 0; width: 0; height: 0; }   /* checkbox accessibile ma invisibile */
.nav-burger {
  margin-left: auto; display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; cursor: pointer; color: var(--fg);
  font-size: 26px; line-height: 1;
  -webkit-tap-highlight-color: transparent;
}
.nav-burger .icon-open::before { content: "\2630"; }   /* ☰ */
.nav-burger .icon-close { display: none; }
.nav-burger .icon-close::before { content: "\2715"; }  /* ✕ */

@media (max-width: 767px) {
  .site-header { position: relative; flex-wrap: wrap; }
  .site-header nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-top: 1px solid var(--surface-line);
    border-bottom: 1px solid var(--surface-line);
    padding: 4px 32px 16px; z-index: 30;
    box-shadow: 0 16px 32px rgba(0,0,0,0.45);
  }
  .site-header nav a { padding: 12px 0; width: 100%; font-size: 14px; }
  .site-header { z-index: 40; }   /* header e menu sopra il contenuto .page */
  .site-header .lang { padding: 12px 0 0; margin-top: 6px; border-left: none; border-top: 1px solid var(--surface-line); width: 100%; }
  .nav-toggle:checked ~ nav { display: flex; }
  .nav-toggle:checked ~ .nav-burger .icon-open { display: none; }
  .nav-toggle:checked ~ .nav-burger .icon-close { display: block; }
}
@media (min-width: 768px) {
  .site-header nav { display: flex; }
  .nav-burger { display: none; }
}

/* ─── BREADCRUMB ─── */
.breadcrumb {
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  letter-spacing: 0.06em; color: var(--stone); padding: 8px 0 0;
}
.breadcrumb a:hover { color: var(--accent-bright); }
.breadcrumb .sep { opacity: 0.5; margin: 0 8px; }

/* ─── HERO ─── */
.lp-hero { padding: 56px 0 72px; }
@media (min-width: 768px) { .lp-hero { padding: 72px 0 96px; } }
.lp-hero h1 {
  font-family: 'Inter', sans-serif; font-weight: 600;
  font-size: clamp(34px, 6vw, 60px); letter-spacing: -0.03em; line-height: 1.05;
  margin: 22px 0 0; max-width: 16ch;
}
.lp-hero .sub {
  font-size: clamp(16px, 2.4vw, 20px); color: var(--fg-soft);
  max-width: 56ch; margin: 22px 0 0; font-weight: 400;
}
.lp-hero .cta-row { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 14px 22px; border-radius: 2px; transition: all 0.2s ease;
}
.btn--primary { background: var(--accent); color: var(--paper); border: 1px solid var(--accent); }
.btn--primary:hover { background: var(--accent-bright); border-color: var(--accent-bright); }
.btn--ghost { color: var(--fg); border: 1px solid var(--surface-line); }
.btn--ghost:hover { border-color: var(--accent-bright); color: var(--accent-bright); }

/* ─── SECTIONS ─── */
.lp-section { padding: 72px 0; border-top: 1px solid var(--hairline); }
@media (min-width: 768px) { .lp-section { padding: 96px 0; } }
.lp-section.surface { background: var(--bg); }   /* sfondo pieno: copre la rete punti */
.lp-section h2 {
  font-family: 'Inter', sans-serif; font-weight: 600;
  font-size: clamp(26px, 4.5vw, 40px); letter-spacing: -0.03em; line-height: 1.1;
  margin: 16px 0 0; max-width: 22ch;
}
.lp-section .lead { color: var(--fg-soft); font-size: clamp(15px, 2vw, 17px); max-width: 60ch; margin: 16px 0 0; }
.lp-section .body { color: var(--fg-soft); max-width: 62ch; margin: 24px 0 0; }
.lp-section .body p { margin: 0 0 16px; }

/* ─── GRID CARDS ─── */
.cards { display: grid; grid-template-columns: 1fr; gap: 1px; background: var(--surface-line);
  border: 1px solid var(--surface-line); border-radius: 6px; overflow: hidden; margin-top: 44px; }
@media (min-width: 640px) { .cards.cols-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 860px) { .cards.cols-3 { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--surface); padding: 30px 26px; }
.card .num { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.08em; color: var(--accent-bright); }
.card h3 { font-family: 'Inter', sans-serif; font-size: 19px; font-weight: 600; letter-spacing: -0.02em; margin: 12px 0 8px; }
.card p { color: var(--fg-soft); font-size: 14.5px; margin: 0; }

/* ─── STEPS ─── */
.steps { list-style: none; margin: 44px 0 0; padding: 0; counter-reset: step; }
.steps li {
  display: flex; gap: 20px; padding: 22px 0; border-top: 1px solid var(--hairline);
}
.steps li:first-child { border-top: none; }
.steps .n {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--accent-bright);
  min-width: 36px; padding-top: 3px;
}
.steps h3 { font-family: 'Inter', sans-serif; font-size: 18px; font-weight: 600; margin: 0 0 4px; letter-spacing: -0.01em; }
.steps p { color: var(--fg-soft); font-size: 15px; margin: 0; max-width: 60ch; }

/* ─── FAQ ─── */
.faq { margin-top: 40px; }
.faq details {
  border-top: 1px solid var(--hairline); padding: 4px 0;
}
.faq details:last-child { border-bottom: 1px solid var(--hairline); }
.faq summary {
  cursor: pointer; list-style: none; padding: 20px 0;
  font-family: 'Inter', sans-serif; font-size: 17px; font-weight: 500;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent-bright); font-family: 'JetBrains Mono', monospace; font-size: 20px; transition: transform 0.2s ease; }
.faq details[open] summary::after { content: "−"; }
.faq .answer { color: var(--fg-soft); padding: 0 0 20px; max-width: 64ch; font-size: 15px; }

/* ─── FINAL CTA ─── */
.lp-cta { padding: 88px 0; border-top: 1px solid var(--hairline); text-align: center; background: var(--bg); }
.lp-cta h2 { font-family: 'Inter', sans-serif; font-weight: 600; font-size: clamp(28px, 5vw, 46px); letter-spacing: -0.03em; margin: 0 auto; max-width: 18ch; }
.lp-cta p { color: var(--fg-soft); margin: 18px auto 0; max-width: 50ch; }
.lp-cta .cta-row { margin-top: 34px; display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }

/* ─── FOOTER ─── */
.site-footer { background: var(--bg); border-top: 1px solid var(--hairline); padding: 28px 0;
  font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--stone); }
.site-footer .footer-top { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.site-footer a:hover { color: var(--accent-bright); }
.site-footer .legal { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--hairline);
  font-family: 'Inter', sans-serif; font-size: 11px; letter-spacing: 0; text-transform: none; line-height: 1.6; color: var(--stone); text-align: center; }
.site-footer .legal strong { color: var(--fg-soft); font-weight: 600; }
.site-footer .legal-links { margin-top: 12px; text-align: center; font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--stone); }
.site-footer .legal-links a { color: var(--stone); }
.site-footer .legal-links a:hover { color: var(--accent-bright); }

.site-footer .funding { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--hairline); display: flex; justify-content: center; }
.site-footer .funding img { height: 96px; width: auto; max-width: 100%; display: block; }

/* ─── REVEAL on scroll ─── */
.fade { opacity: 0; transform: translateY(16px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade { opacity: 1; transform: none; transition: none; }
}