/* ═══════════════════════════════════════════════════════════
   Nile — reset, atmosfera, tipografia di base
   ═══════════════════════════════════════════════════════════ */

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--bone-2);
  font-family: var(--serif);
  font-size: var(--fs-body);
  line-height: 1.68;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* alone caldo: la "candela" in alto, la brace in fondo */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(120% 70% at 50% -12%, rgba(195, 154, 90, 0.13), transparent 62%),
    radial-gradient(90% 60% at 8% 108%, rgba(125, 58, 41, 0.10), transparent 60%),
    var(--ink);
}

/* grana di pellicola su tutta la pagina */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.34;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
  animation: grain 5s steps(6) infinite;
}

@keyframes grain {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-3%, 2%); }
  40%  { transform: translate(2%, -3%); }
  60%  { transform: translate(-2%, -2%); }
  80%  { transform: translate(3%, 1%); }
  100% { transform: translate(0, 0); }
}

/* vignettatura */
.vignette {
  position: fixed;
  inset: 0;
  z-index: 9997;
  pointer-events: none;
  background: radial-gradient(115% 85% at 50% 45%, transparent 42%, rgba(0, 0, 0, 0.72) 100%);
}

/* ── tipografia ───────────────────────────────────────────── */

h1, h2, h3 {
  font-weight: 300;
  color: var(--bone);
  margin: 0;
  letter-spacing: -0.01em;
  line-height: 1.06;
}

em { font-style: italic; color: var(--brass); }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.4s var(--ease), opacity 0.4s var(--ease);
}

.display {
  font-size: var(--fs-h2);
  text-wrap: balance;
}

.label {
  font-family: var(--sans);
  font-size: var(--fs-label);
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--bone-dim);
  margin: 0 0 1.6rem;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  background: var(--soot);
  color: var(--bone);
  padding: 0.9rem 1.4rem;
  font-family: var(--sans);
  font-size: 0.8rem;
}
.skip:focus { left: 1rem; top: 1rem; }

:focus-visible {
  outline: 1px solid var(--brass);
  outline-offset: 4px;
}

::selection { background: rgba(195, 154, 90, 0.28); color: var(--bone); }

/* ── comparsa allo scroll ─────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity var(--slow) var(--ease),
    transform var(--slow) var(--ease);
  transition-delay: calc(var(--d, 0) * 110ms);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ── pulsanti ─────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--bone);
  padding: 1.05rem 1.9rem;
  border: 1px solid var(--hair);
  background: rgba(232, 224, 211, 0.02);
  transition: border-color 0.5s var(--ease), background 0.5s var(--ease), color 0.5s var(--ease);
}
.btn:hover { border-color: var(--brass-dim); background: rgba(195, 154, 90, 0.07); }
.btn--ghost { border-color: transparent; padding-left: 0.4rem; padding-right: 0.4rem; color: var(--bone-dim); }
.btn--ghost:hover { color: var(--brass); background: none; }
.btn--solid { border-color: var(--brass-dim); color: var(--brass); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .grain { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}