/* ==========================================================================
   MCM — intro.css
   Intro in due atti: schermata di marchio, poi apertura del video hero.

   La scena e alta 200vh e contiene uno sticky da 100vh. Lo scroll dentro quei
   200vh viene tradotto da intro.js in custom property; qui il CSS si limita a
   consumarle. Senza JavaScript i valori restano ai default dichiarati sotto,
   che mostrano l hero gia aperto e leggibile.
   ========================================================================== */

.intro {
  position: relative;
  height: 200vh;
  background: var(--dark);
}

.intro__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
}

/* --- Atto 2 — il palco con il video hero (sta sotto) --------------------- */

.intro__stage {
  position: absolute;
  inset: 0;
  z-index: 1;
  /* Senza JS il palco e gia aperto: il sito resta usabile */
  opacity: var(--stage-opacity, 1);
  transform: scale(var(--stage-scale, 1));
  will-change: opacity, transform;
}

.intro__stage video,
.intro__stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.intro__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    var(--dark) 0%,
    rgba(10, 10, 11, 0.72) 24%,
    rgba(10, 10, 11, 0.08) 62%,
    rgba(10, 10, 11, 0.42) 100%
  );
}

/* --- Testo dell hero, dentro il palco ------------------------------------ */

.intro__hero {
  position: absolute;
  left: 50%;
  bottom: clamp(3rem, 7vw, 6rem);
  transform: translateX(-50%) translateY(var(--hero-y, 0px));
  width: var(--shell);
  opacity: var(--hero-opacity, 1);
  will-change: opacity, transform;
}

.intro__eyebrow { margin-bottom: 1.25rem; }

.intro__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.5rem, 6.5vw, 6rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.intro__title span { display: block; }

.intro__subtitle {
  max-width: 42ch;
  color: var(--muted);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.intro__specs {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-top: 1.75rem;
  border-top: 1px solid var(--hairline);
}

.intro__spec-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2.25rem);
  line-height: 1;
}

.intro__spec-value i {
  font-style: normal;
  color: var(--gold);
  font-size: 0.5em;
  margin-left: 0.25em;
}

/* --- Atto 1 — la schermata di marchio (sta sopra) ------------------------
   Fondo pieno, nessuna immagine: e il momento di marchio puro. */

.intro__brand {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 0;
  background: var(--dark);
  text-align: center;
  pointer-events: none;
  opacity: var(--brand-opacity, 0);
  transform: translateY(var(--brand-y, 0px)) scale(var(--brand-scale, 1));
  will-change: opacity, transform;
}

/* Senza JavaScript il marchio non deve coprire l hero */
html:not(.mcm-js) .intro__brand { display: none; }

/* Il file del logo ha un fondo scuro proprio, RGB(20,21,25), piu chiaro del
   nero di pagina: lasciato cosi si vedrebbe il rettangolo. Il blend "screen"
   somma la luce (l oro resta oro, il nero sparisce) e la maschera radiale
   sfuma i bordi, cosi il riquadro non ha piu confini percepibili. */
.intro__logo {
  width: clamp(220px, 42vw, 720px);
  height: auto;
  mix-blend-mode: screen;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 52%, transparent 76%);
  mask-image: radial-gradient(ellipse at center, #000 52%, transparent 76%);
}

/* Il <picture> non deve introdurre una riga di testo fra logo e filo dorato */
.intro__brand picture { display: block; line-height: 0; }

.intro__mark {
  display: block;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(3.5rem, 13vw, 9rem);
  line-height: 1;
  letter-spacing: 0.08em;
  text-indent: 0.08em;
  color: var(--ice);
}

/* Linea dorata che si espande all ingresso in pagina */
.intro__rule {
  display: block;
  width: min(320px, 44vw);
  height: 1px;
  margin: clamp(1.25rem, 3vw, 2rem) auto;
  background: linear-gradient(to right, transparent, var(--gold) 22%, var(--gold) 78%, transparent);
  transform: scaleX(0);
  animation: mcm-rule-open 1.6s var(--ease-out) 0.35s forwards;
}

@keyframes mcm-rule-open {
  to { transform: scaleX(1); }
}

.intro__tagline {
  display: block;
  font-size: clamp(0.55rem, 1.3vw, 0.7rem);
  font-weight: 300;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
  animation: mcm-fade-up 1.4s var(--ease-out) 0.9s forwards;
}

@keyframes mcm-fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* --- Invito allo scroll con chevron -------------------------------------- */

.intro__cue {
  position: absolute;
  left: 50%;
  bottom: clamp(1.75rem, 4vw, 2.75rem);
  transform: translateX(-50%);
  z-index: 3;
  display: grid;
  justify-items: center;
  gap: 0.85rem;
  font-size: 0.55rem;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: var(--cue-opacity, 1);
  pointer-events: none;
}

.intro__chevron {
  width: 16px;
  height: 16px;
  border-right: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  transform: rotate(45deg);
  animation: mcm-chevron 2.2s var(--ease-out) infinite;
}

@keyframes mcm-chevron {
  0%, 100% { transform: rotate(45deg) translate(0, 0);    opacity: 0.35; }
  50%      { transform: rotate(45deg) translate(4px, 4px); opacity: 1; }
}

/* --- Schermi bassi -------------------------------------------------------- */

@media (max-height: 640px) {
  .intro__mark { font-size: clamp(2.5rem, 11vh, 5rem); }
  .intro__rule { margin-block: 0.85rem; }
  .intro__specs { display: none; }
}

/* --- Movimento ridotto ----------------------------------------------------
   Niente transizione a due atti: si mostra direttamente l hero. */

.intro--statica { height: 100vh; height: 100svh; }
.intro--statica .intro__brand { display: none; }
.intro--statica .intro__cue { display: none; }

@media (prefers-reduced-motion: reduce) {
  .intro { height: 100vh; height: 100svh; }
  .intro__brand { display: none; }
  .intro__cue { display: none; }
  .intro__rule { transform: none; animation: none; }
  .intro__tagline { opacity: 1; animation: none; }
  .intro__stage { opacity: 1; transform: none; }
  .intro__hero { opacity: 1; transform: translateX(-50%); }
}