/* =====================================================
   Dario Cogliati — landing page statica
   ===================================================== */

:root{
  --off: .4;               /* opacità nero 40% - stato base di TUTTO */
  --on: 1;                 /* opacità nero 100% - stato OVER */
  --icon-size: 64px;
  --icon-size-bottom: 78px;
  --gap: 18px;
  --font-main: 'Myriad Pro', 'Myriad Set Pro', 'Myriad', 'Segoe UI', -apple-system,
               BlinkMacSystemFont, Helvetica, Arial, sans-serif;
}

*{ box-sizing: border-box; }

html, body{
  height: 100%;
  margin: 0;
  background: #fff;
  font-family: var(--font-main);
  -webkit-font-smoothing: antialiased;
}

body{
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
}

a{ text-decoration: none; color: inherit; }

svg path, svg polygon, svg rect{ fill: #000; }

/* =====================================================
   STAGE — layout a croce (desktop / tablet)
   ===================================================== */

.stage{
  position: relative;
  width: min(88vw, 1150px);
  aspect-ratio: 1291.8 / 735.96;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-rows: 1fr auto 1fr;
  align-items: center;
  justify-items: center;
}

/* Linee di sfondo: sempre a nero 40%, non reagiscono all'hover */
.lines-bg{
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--off);
}
.lines-bg svg{ width: 100%; height: 100%; display: block; }
.lines-bg svg path, .lines-bg svg rect{ fill: #000; }

/* Nodo centrale: nessuno sfondo bianco che copra le linee, solo il testo */
.center-hex{
  grid-column: 2;
  grid-row: 2;
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
}

.center-text{
  position: relative;
  display: inline-block;
  width: 170px;
  height: 24px;
}
.center-text .txt{
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  color: #000;
  font-size: 16px;
  font-weight: 400;
  transition: opacity .25s ease;
}
.center-text .txt-default{ opacity: 1; }
.center-text .txt-hover{
  font-weight: 700; /* entra: bold, stessa dimensione di Dario Cogliati */
  text-transform: lowercase;
  opacity: 0;
}
.stage.is-entra .txt-default{ opacity: 0; }
.stage.is-entra .txt-hover{ opacity: 1; }

/* Voci di navigazione — base: tutte a nero 40% (icona + testo) */
.nav-item{
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: var(--gap);
  cursor: default;
}

.nav-item .icon{
  display: flex;
  opacity: var(--off);
  transition: opacity .25s ease;
}
.nav-item .label{
  font-size: 15px;
  letter-spacing: .02em;
  white-space: nowrap;
  color: #000;
  opacity: var(--off);
  transition: opacity .25s ease;
}

.icon svg{ width: var(--icon-size); height: var(--icon-size); display: block; }

/* Link attivi: cliccabili, salgono a nero 100% (icona + testo) su hover/focus */
a.nav-item{ cursor: pointer; }
a.nav-item:hover .icon,
a.nav-item:focus-visible .icon{ opacity: var(--on); }
a.nav-item:hover .label,
a.nav-item:focus-visible .label{ opacity: var(--on); }

/* Voci disabilitate: restano sempre a nero 40%, nessun hover */
.nav-item.is-disabled{ pointer-events: none; }
.nav-item.is-disabled .icon{ opacity: var(--off) !important; }
.nav-item.is-disabled .label{ opacity: var(--off) !important; }

/* Posizionamento sulla croce: etichetta verso l'esterno, icona verso il centro */
.nav-top{
  grid-column: 2;
  grid-row: 1;
  align-self: end;
  flex-direction: column;
  padding-bottom: 48%;
}

.nav-bottom{
  grid-column: 2;
  grid-row: 3;
  align-self: start;
  flex-direction: column;
  padding-top: 48%;
}
.nav-bottom .icon svg{ width: var(--icon-size-bottom); height: var(--icon-size-bottom); }

.nav-left{
  grid-column: 1;
  grid-row: 2;
  justify-self: end;
  flex-direction: row;
  padding-right: 24%;
}

.nav-right{
  grid-column: 3;
  grid-row: 2;
  justify-self: start;
  flex-direction: row;
  padding-left: 24%;
}

/* =====================================================
   MOBILE — elenco verticale semplice
   ===================================================== */
@media (max-width: 760px){

  .lines-bg,
  .center-hex{ display: none; }

  .stage{
    display: flex;
    flex-direction: column;
    width: 84vw;
    max-width: 420px;
    aspect-ratio: unset;
  }

  .nav-item{
    flex-direction: column !important;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 30px 0;
    border-bottom: 1px solid rgba(0,0,0,.15);
  }
  .nav-item:last-child{ border-bottom: none; }

  /* Su mobile non esiste hover: le voci con link sono sempre a nero 100% */
  a.nav-item .icon,
  a.nav-item .label{ opacity: 1; }

  .nav-item.is-disabled .icon,
  .nav-item.is-disabled .label{ opacity: var(--off); }

  /* su mobile: sempre icona sopra, etichetta sotto, per tutte le voci */
  .nav-top .icon{ order: 0; }
  .nav-top .label{ order: 1; }
  .nav-left .icon{ order: 0; }
  .nav-left .label{ order: 1; }

  .icon svg{ width: 48px; height: 48px; }
  .nav-bottom .icon svg{ width: 84px; height: 84px; }

  .nav-left, .nav-right{ padding: 30px 0; }
}