/* ====== styles existants ====== */
nav {
  width: 100vw;
  background-color: rgb(251, 251, 251);
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center; /* pour centrer verticalement */
  box-sizing: border-box;
}
h3 {
  color: rgb(148, 147, 147);
  margin: 0;
}
ul {
  margin: auto 0;
  display: flex;
  list-style: none;
  gap: 40px;
  padding: 0;
  align-items: center;
}
.trait {
  height: 23px;
  width: 1px;
  background-color: black;
}
a {
  color: black;
  text-decoration: none;
}

/* ====== burger (caché en desktop) ====== */
.nav-toggle {
  display: none;
}
.nav-burger {
  display: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  -webkit-tap-highlight-color: transparent;
}
.nav-burger span {
  display: block;
  width: 26px;
  height: 2px;
  background: black;
  margin: 6px 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ====== responsive ====== */
@media (max-width: 768px) {
  nav {
    position: relative;
  }

  /* montrer le burger, cacher le menu par défaut */
  .nav-burger {
    display: block;
  }
  ul {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: grid; /* pile verticalement */
    gap: 0;
    background: rgb(251, 251, 251);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
    z-index: 1;
  }
  ul li {
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  }
  ul li a {
    display: block;
    padding: 14px 20px;
  }
  ul .trait {
    display: none;
  } /* on masque le séparateur en mobile */

  /* ouvrir le menu quand coché */
  .nav-toggle:checked ~ ul {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  /* animation burger -> croix */
  .nav-toggle:checked + .nav-burger span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .nav-toggle:checked + .nav-burger span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle:checked + .nav-burger span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* réduire l’encombrement des titres sur petits écrans */
  h1 {
    font-size: 1.05rem;
    margin: 0;
  }
  h3 {
    font-size: 0.8rem;
    line-height: 1.2;
  }

  /* s'assurer que le titre/burger restent cliquables au-dessus du menu */
  a[aria-label^="Accueil"],
  .nav-burger {
    z-index: 2;
  }
}

/* focus visible pour accessibilité */
.nav-burger:focus-visible {
  outline: 2px solid #000;
  outline-offset: 3px;
}