/* ============================================================
   ETERNAVA — Base: reset, tipografia, layout, nav, footer,
   utilità condivise. I worker NON toccano questo file.
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg-void);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  overflow-x: hidden;
}

img, video { max-width: 100%; height: auto; display: block; }

h1, h2, h3 { margin: 0 0 var(--sp-2); font-weight: 600; }
p { margin: 0 0 var(--sp-2); }
a { color: var(--accent-soft); }

/* --- Font locali — gli stessi dello studio --- */
@font-face {
  font-family: "Syne";
  src: url("../assets/fonts/Syne-Variable.woff2") format("woff2");
  font-weight: 400 800;
  font-display: swap;
}
@font-face {
  font-family: "Space Grotesk";
  src: url("../assets/fonts/SpaceGrotesk-Variable.woff2") format("woff2");
  font-weight: 300 700;
  font-display: swap;
}

/* --- Sfondo cosmico --- */
.sky {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 40% at 15% 10%, var(--nebula-violet), transparent 60%),
    radial-gradient(ellipse 50% 35% at 85% 30%, var(--nebula-cyan), transparent 60%),
    radial-gradient(ellipse 70% 50% at 50% 95%, rgba(139, 92, 246, 0.08), transparent 65%),
    var(--bg-void);
}
.sky canvas { width: 100%; height: 100%; opacity: 0.6; }

/* --- Struttura --- */
.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}
.container--narrow { max-width: var(--container-narrow); }

section[data-theme] {
  position: relative;
  padding-block: var(--sp-section);
}

/* alone di nebula dietro ogni sezione, nel colore del suo tema */
section[data-theme]::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 70% 55% at 50% 40%, var(--nebula), transparent 70%);
}
section[data-theme] > * { position: relative; }

/* --- Tipografia condivisa --- */
.eyebrow {
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sp-2);
}

.h-display {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  line-height: var(--lh-tight);
  font-weight: 570;
  letter-spacing: -0.015em;
}

.h-section {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  line-height: var(--lh-head);
  font-weight: 550;
  letter-spacing: -0.01em;
  max-width: 21ch;
}

.h-card {
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: -0.005em;
}

.lead { font-size: clamp(1.1rem, 1.5vw, 1.3rem); color: var(--ink-dim); }
.dim { color: var(--ink-dim); }
.faint { color: var(--ink-faint); font-size: var(--fs-small); }

/* --- Vetro --- */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius-m);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-card);
}

/* --- Bottoni --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: 0.85em 1.7em;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, var(--violet), #6D3EF2);
  color: #fff;
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.45);
}
.btn--primary:hover { box-shadow: 0 12px 40px rgba(139, 92, 246, 0.6); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--glass-brd);
}
.btn--ghost:hover { background: rgba(168, 168, 195, 0.08); }

.btn--warm {
  background: linear-gradient(135deg, var(--amber), #F59E0B);
  color: #1A1206;
  box-shadow: 0 8px 30px rgba(251, 191, 36, 0.35);
}

/* --- Accessibilità --- */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--sp-2);
  z-index: var(--z-skip);
  padding: 0.6em 1.2em;
  background: var(--violet);
  color: #fff;
  border-radius: var(--radius-s);
  text-decoration: none;
}
.skip-link:focus { top: var(--sp-2); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* --- Nav --- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  transition: background 0.25s ease, border-color 0.25s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(11, 11, 26, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--glass-brd);
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding-block: 0.9rem;
}
.nav__logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.14em;
  color: var(--ink);
  text-decoration: none;
}
.nav__links {
  display: flex;
  gap: var(--sp-3);
  margin-left: auto;
  list-style: none;
  margin-block: 0;
  padding: 0;
}
.nav__links a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 0.925rem;
  transition: color 0.15s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__cta { margin-left: var(--sp-2); }
.nav__cta .btn { padding: 0.55em 1.2em; font-size: 0.9rem; }

.nav__burger {
  display: none;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
}
.nav__burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--ink);
  margin: 5px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 860px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: block; }
  .nav.is-open .nav__links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: rgba(11, 11, 26, 0.97);
    border-bottom: 1px solid var(--glass-brd);
    padding: var(--sp-3);
    gap: var(--sp-2);
  }
  .nav.is-open .nav__burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.is-open .nav__burger span:nth-child(2) { opacity: 0; }
  .nav.is-open .nav__burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--glass-brd);
  padding-block: var(--sp-4);
  color: var(--ink-faint);
  font-size: var(--fs-small);
}
.footer p { margin-bottom: 0.4rem; }
.footer a { color: var(--ink-dim); }

/* --- Animazioni: il contenuto è SEMPRE visibile di default.
       È animations.js (GSAP) a nascondere e rivelare: se il JS
       non arriva, la pagina resta comunque leggibile. --- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}