/* Base: reset, tipografia, scena di sfondo, elementi nativi tematizzati. */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + var(--s-6));
  scrollbar-color: var(--line-strong) transparent;
  background: var(--bg);
}

body {
  margin: 0;
  position: relative;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

h1, h2, h3, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }

h1, h2, h3 { font-weight: 600; text-wrap: balance; color: var(--ink); }
h1, h2 { font-family: var(--font-display); }
h1 { font-size: var(--fs-display); line-height: 1.02; letter-spacing: -0.035em; font-weight: 700; }
h2 { font-size: var(--fs-h2); line-height: 1.08; letter-spacing: -0.03em; font-weight: 700; }
h3 { font-size: var(--fs-h3); line-height: 1.3; letter-spacing: -0.01em; }
p { text-wrap: pretty; }

a {
  color: var(--accent);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--accent-strong); text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-control);
}

/* Superfici del browser che altrimenti restano di sistema */
::selection { background: var(--accent); color: var(--on-accent); }
input, textarea, select { caret-color: var(--accent); accent-color: var(--accent); }
::placeholder { color: var(--ink-3); opacity: 1; }

.skip-link {
  position: absolute;
  left: var(--s-4);
  top: -100px;
  z-index: 60;
  padding: var(--s-3) var(--s-4);
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--r-control);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: var(--s-3); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.icon { flex: none; fill: currentColor; }

/* ---------- Scena: aurora fissa dietro tutta la pagina ---------- */
.scene {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% 0%, var(--bg-2), var(--bg) 70%);
}
.scene::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgb(255 255 255 / .045) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / .045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(90% 70% at 50% 35%, #000 20%, transparent 78%);
  mask-image: radial-gradient(90% 70% at 50% 35%, #000 20%, transparent 78%);
}
.scene__blob {
  position: absolute;
  border-radius: 50%;
  will-change: transform;
}
.scene__blob--1 {
  width: 62vmax; height: 62vmax;
  left: -18vmax; top: -22vmax;
  background: radial-gradient(closest-side, var(--blob-1), transparent);
  animation: drift-1 38s ease-in-out infinite alternate;
}
.scene__blob--2 {
  width: 54vmax; height: 54vmax;
  right: -12vmax; top: -6vh;
  background: radial-gradient(closest-side, var(--blob-3), transparent);
  animation: drift-2 46s ease-in-out infinite alternate;
}
.scene__blob--3 {
  width: 58vmax; height: 58vmax;
  left: 10vw; bottom: -34vmax;
  background: radial-gradient(closest-side, var(--blob-2), transparent);
  animation: drift-3 52s ease-in-out infinite alternate;
}
@keyframes drift-1 { to { transform: translate3d(14vmax, 10vmax, 0) scale(1.12); } }
@keyframes drift-2 { to { transform: translate3d(-16vmax, 8vmax, 0) scale(0.92); } }
@keyframes drift-3 { to { transform: translate3d(12vmax, -12vmax, 0) scale(1.1); } }

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