/* ═══════════════════════════════════════════════════════════════
   GOLDEN SERVAL — nav.css
   Stile UNICO per navbar desktop + menu mobile.
   Caricato sia da golden-serval.html che da forum.html.

   Versione mobile:
   - nessuno stacco netto tra status bar, menu e contenuto
   - sopra molto scuro, poi sfumatura morbida verso la pagina
   - hamburger non tagliato
   - valido anche per forum.html
   ═══════════════════════════════════════════════════════════════ */

:root {
  --gs-nav-desktop-height: 70px;
  --gs-nav-mobile-height: 86px;
}

/* ═══ NAV DESKTOP ═══ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;

  z-index: 10020;

  display: flex;
  align-items: flex-end;
  justify-content: space-between;

  height: calc(var(--gs-nav-desktop-height) + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  padding-left: 52px;
  padding-right: 52px;
  padding-bottom: 0;

  /* Lo sfondo vero sta su .nav-bg (vedi sotto): così la transizione
     trasparente ↔ solido avviene via opacity ed è fluida.
     I gradienti CSS NON sono animabili: animarli direttamente
     produce lo "scatto" secco. */
  background: transparent;

  border-bottom: 0;

  transform: translateZ(0);
  -webkit-transform: translateZ(0);

  overflow: visible;
}

/* Livello di sfondo della navbar: porta gradiente + blur,
   e sfuma dolcemente quando si è in cima alla pagina (.nav-at-top). */
nav .nav-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;

  background:
    radial-gradient(ellipse 100% 110% at 50% 32%, rgba(112, 64, 176, 0.22), transparent 76%),
    linear-gradient(
      180deg,
      #080313 0%,
      #080313 34%,
      #0b041c 58%,
      #12072b 100%
    );

  backdrop-filter: blur(18px) saturate(145%);
  -webkit-backdrop-filter: blur(18px) saturate(145%);

  opacity: 1;
  transition: opacity 0.5s ease;
  will-change: opacity;
}

/*
  Sfumatura sotto la navbar.
  Deve stare SOPRA il contenuto, non dietro: così elimina il taglio netto.
*/
nav::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 46px;
  pointer-events: none;
  z-index: 0;

  transition: opacity 0.5s ease;

  background:
    linear-gradient(
      180deg,
      rgba(18, 7, 43, 0.92) 0%,
      rgba(18, 7, 43, 0.60) 34%,
      rgba(18, 7, 43, 0.28) 68%,
      rgba(18, 7, 43, 0.00) 100%
    );
}

nav::before {
  display: none;
}

/* Porta logo/link/burger sopra la sfumatura */
nav .nav-logo,
nav .nav-links,
nav .nav-burger {
  position: relative;
  z-index: 2;
  margin-bottom: 12px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  font-family: 'Brush Script MT', cursive;
  font-size: 1.85rem;
  color: var(--gold, #e8a820);
  text-decoration: none;
  text-shadow: 0 0 20px rgba(232, 168, 32, 0.4);
  white-space: nowrap;
}
.nav-logo img {
  display: block;
  height: 34px;
  width: auto;
  filter: drop-shadow(0 0 14px rgba(232, 168, 32, 0.35));
}

.nav-links {
  display: flex;
  gap: 38px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.95rem;
  letter-spacing: 3px;
  color: var(--text-dim, #9e8cbf);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gold, #e8a820);
  transform: scaleX(0);
  transition: transform 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--gold, #e8a820);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}


/* ═══ HAMBURGER MOBILE ═══ */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;

  width: 48px;
  height: 48px;

  background:
    linear-gradient(180deg, rgba(13, 5, 32, 0.96), rgba(8, 3, 20, 0.90));

  border: 1px solid rgba(184, 126, 232, 0.38);
  border-radius: 14px;

  cursor: pointer;
  padding: 8px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;

  z-index: 10030;
  flex-shrink: 0;
  overflow: visible;

  -webkit-tap-highlight-color: transparent;
}

.nav-burger:hover {
  border-color: var(--gold, #e8a820);
  background: rgba(18, 8, 44, 0.98);
  box-shadow: 0 0 18px rgba(112, 64, 176, 0.35);
}

.nav-burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text, #ede5ff);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s, background 0.2s;
  transform-origin: center;
}

.nav-burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--gold, #e8a820);
}

.nav-burger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--gold, #e8a820);
}


/* ═══ OVERLAY SCURO DIETRO IL MENU MOBILE ═══ */
.nav-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.56);
  z-index: 10005;
  opacity: 0;
  transition: opacity 0.3s;
}

.nav-mobile-overlay.open {
  display: block;
  opacity: 1;
}


/* ═══ MENU MOBILE A TENDINA ═══ */
.nav-mobile {
  position: fixed;
  top: calc(var(--gs-nav-desktop-height) + env(safe-area-inset-top, 0px));
  left: 0;
  right: 0;

  z-index: 10015;

  background:
    radial-gradient(ellipse 90% 50% at 50% 0%, rgba(128, 64, 208, 0.34), transparent 72%),
    linear-gradient(
      180deg,
      rgba(8, 3, 20, 0.98) 0%,
      rgba(10, 4, 26, 0.96) 26%,
      rgba(18, 7, 44, 0.88) 58%,
      rgba(32, 12, 68, 0.66) 100%
    );

  border-bottom: 0;
  box-shadow: 0 24px 55px rgba(0, 0, 0, 0.48);

  backdrop-filter: blur(18px) saturate(145%);
  -webkit-backdrop-filter: blur(18px) saturate(145%);

  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;

  transition:
    transform 0.3s cubic-bezier(.4, 0, .2, 1),
    opacity 0.3s;

  overflow-y: auto;
  overflow-x: hidden;
  max-height: calc(100dvh - var(--gs-nav-desktop-height) - env(safe-area-inset-top, 0px));
  -webkit-overflow-scrolling: touch;
}

.nav-mobile.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

/* Sfumatura finale del menu aperto */
.nav-mobile::after {
  content: '';
  display: block;
  height: 42px;
  margin-bottom: -42px;
  pointer-events: none;

  background:
    linear-gradient(
      180deg,
      rgba(32, 12, 68, 0.52) 0%,
      rgba(32, 12, 68, 0.28) 42%,
      rgba(32, 12, 68, 0.10) 74%,
      rgba(32, 12, 68, 0.00) 100%
    );
}

.nav-mobile-links {
  list-style: none;
  padding: 12px 0 18px;
  margin: 0;
}

.nav-mobile-links li {
  border-bottom: 1px solid rgba(112, 64, 176, 0.14);
}

.nav-mobile-links li:last-child {
  border-bottom: none;
}

.nav-mobile-links a {
  display: flex;
  align-items: center;
  gap: 16px;

  padding: 18px 28px;

  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.2rem;
  letter-spacing: 4px;
  color: var(--text, #ede5ff);
  text-decoration: none;

  transition: color 0.2s, background 0.2s, padding-left 0.2s;
}

.nav-mobile-links a:hover,
.nav-mobile-links a:active {
  color: var(--gold, #e8a820);
  background: rgba(240, 184, 48, 0.08);
  padding-left: 36px;
}

.nm-icon {
  font-size: 1.1rem;
  width: 28px;
  text-align: center;
  opacity: 0.75;
}

/* Stagger animation per le voci del menu */
.nav-mobile.open .nav-mobile-links li:nth-child(1) a { animation: nav-slideIn 0.3s 0.05s both; }
.nav-mobile.open .nav-mobile-links li:nth-child(2) a { animation: nav-slideIn 0.3s 0.10s both; }
.nav-mobile.open .nav-mobile-links li:nth-child(3) a { animation: nav-slideIn 0.3s 0.15s both; }
.nav-mobile.open .nav-mobile-links li:nth-child(4) a { animation: nav-slideIn 0.3s 0.20s both; }
.nav-mobile.open .nav-mobile-links li:nth-child(5) a { animation: nav-slideIn 0.3s 0.25s both; }

@keyframes nav-slideIn {
  from { opacity: 0; transform: translateX(-16px); }
  to   { opacity: 1; transform: translateX(0); }
}


/* ═══ MEDIA QUERIES ═══ */

/* Mobile: fix specifico per iPhone/Safari */
@media (max-width: 768px) {
  nav {
    height: calc(var(--gs-nav-mobile-height) + env(safe-area-inset-top, 0px));
    min-height: unset;

    align-items: center;

    padding-top: env(safe-area-inset-top, 0px);
    padding-left: 18px;
    padding-right: 18px;
    padding-bottom: 0;

    /*
      Mobile:
      parte alta NERA per fondersi con la barra/status bar del telefono,
      poi entra gradualmente il viola e infine sfuma verso il contenuto.
      (Il gradiente vive su .nav-bg per poter sfumare con opacity.)
    */
    background: transparent;

    border-bottom: 0;
  }

  nav .nav-bg {
    background:
      radial-gradient(ellipse 110% 120% at 50% 92%, rgba(112, 64, 176, 0.26), transparent 76%),
      linear-gradient(
        180deg,
        #000000 0%,
        #000000 46%,
        #05020d 58%,
        #090318 72%,
        rgba(18, 7, 42, 0.86) 100%
      );
  }

  /*
    Sfumatura sotto la navbar: continua dal nero/viola della barra
    verso la pagina senza creare uno stacco netto.
  */
  nav::after {
    height: 62px;
    background:
      linear-gradient(
        180deg,
        rgba(18, 7, 42, 0.86) 0%,
        rgba(25, 9, 52, 0.56) 34%,
        rgba(34, 11, 66, 0.26) 68%,
        rgba(34, 11, 66, 0.00) 100%
      );
  }

  nav .nav-logo,
  nav .nav-links,
  nav .nav-burger {
    margin-bottom: 0;
  }

  .nav-logo {
    font-size: 1.72rem;
    line-height: 1;
  }

  .nav-logo img {
    height: 28px;
  }

  .nav-links {
    display: none !important;
  }

  .nav-burger {
    display: flex !important;
    width: 52px;
    height: 52px;
    border-radius: 16px;
  }

  .nav-mobile {
    top: calc(var(--gs-nav-mobile-height) + env(safe-area-inset-top, 0px));
    max-height: calc(100dvh - var(--gs-nav-mobile-height) - env(safe-area-inset-top, 0px));
  }
}

/* Schermi molto stretti */
@media (max-width: 380px) {
  .nav-logo {
    font-size: 1.58rem;
  }

  .nav-logo img {
    height: 25px;
  }

  .nav-burger {
    width: 50px;
    height: 50px;
  }
}

/* Desktop */
@media (min-width: 769px) {
  .nav-burger {
    display: none !important;
  }

  .nav-mobile {
    display: none !important;
  }

  .nav-mobile-overlay {
    display: none !important;
  }
}


/* Override finale — hamburger più coerente con la barra nera mobile */
@media (max-width: 768px) {
  .nav-burger {
    background:
      linear-gradient(180deg, rgba(5, 2, 14, 0.98), rgba(12, 4, 28, 0.92)) !important;
  }
}

/* ═══ TOPPER NERO MOBILE ═══
   Riempie esattamente la safe-area-inset-top con nero pieno,
   così si fonde senza distacchi con la navbar sottostante. */
@media (max-width: 768px) {
  nav::before {
    display: block !important;
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: env(safe-area-inset-top, 0px);
    background: #000000;
    z-index: 10025;
    pointer-events: none;
  }
}