:root {
  --black-bg: #010207;
  --section-bg: #010812;
  --icon-blue: #5F76A2;
  --neon-blue: #3E88FA;
  --neon-violet: #A25EFC;
  --gradient-orange: #AE502C;
  --bg: var(--black-bg);
  --bg2: var(--section-bg);
  --bg3: #06111f;
  --surface: #081427;
  --surface2: #0d2038;
  --border: rgba(62, 136, 250, 0.18);
  --border-strong: rgba(162, 94, 252, 0.55);
  --border-subtle: rgba(255,255,255,0.07);
  --text: #f4f7ff;
  --text-muted: #9aa6bd;
  --text-dim: #53607a;
  --green: #4caf50;
  --red: #ff5f57;
  --orange: var(--neon-blue);
  --orange-dim: var(--neon-violet);
  --orange-glow: rgba(62, 136, 250, 0.2);
  --orange-glow-strong: rgba(162, 94, 252, 0.38);
  --button-gradient: linear-gradient(135deg, var(--neon-blue) 0%, var(--neon-violet) 100%);
  --warm-glow: rgba(174, 80, 44, 0.18);
  --warm-glow-soft: rgba(174, 80, 44, 0.08);
  --font-display: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --font-body: 'DM Sans', sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--orange-dim); border-radius: 2px; }

.it-only, .en-only { display: none; }
html[data-lang="it"] .it-only,
html[data-lang="en"] .en-only { display: initial; }
html[data-lang="it"] p.it-only,
html[data-lang="en"] p.en-only,
html[data-lang="it"] div.it-only,
html[data-lang="en"] div.en-only,
html[data-lang="it"] h1.it-only,
html[data-lang="en"] h1.en-only,
html[data-lang="it"] h2.it-only,
html[data-lang="en"] h2.en-only,
html[data-lang="it"] h3.it-only,
html[data-lang="en"] h3.en-only,
html[data-lang="it"] label.it-only,
html[data-lang="en"] label.en-only,
html[data-lang="it"] span.it-only,
html[data-lang="en"] span.en-only { display: block; }
html[data-lang="it"] a.it-only,
html[data-lang="en"] a.en-only,
html[data-lang="it"] button .it-only,
html[data-lang="en"] button .en-only { display: inline; }

.lang-toggle {
  display: flex;
  gap: 4px;
  align-items: center;
}
.lang-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}
.lang-btn.active, .lang-btn:hover {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
  background: rgba(62, 136, 250, 0.12);
}

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: calc(18px + var(--safe-top)) 5% 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(1,2,7,0.72);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s;
}
nav.scrolled {
  padding: calc(12px + var(--safe-top)) 5% 12px;
  background: rgba(1,2,7,0.94);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo span { color: var(--neon-blue); }
.nav-right { display: flex; align-items: center; gap: 20px; }
.nav-cta {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px 22px;
  border-radius: 6px;
  background: var(--button-gradient);
  color: var(--bg);
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--orange-glow-strong);
}
.nav-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--neon-blue); }

footer {
  background: var(--bg);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
}
.footer-logo span { color: var(--neon-blue); }
.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.spinner-icon { animation: spin 0.8s linear infinite; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

[data-lang="it"] .en-only { display: none !important; }
[data-lang="en"] .it-only { display: none !important; }