/* Diacenter : en-tête et navigation. */

/* ---------- En-tête ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}

.topbar {
  background: var(--night);
  color: var(--on-ink-soft);
  font-size: var(--fs-sm);
}

.topbar__inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-block: 6px;
}

.topbar a {
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.nav__brand {
  display: block;
  flex: none;
  padding: 3px 6px;
  border-radius: 6px;
  /* Tuile claire en thème sombre : le logo a du texte noir. */
  background: var(--logo-tile);
  transition: transform var(--dur) var(--ease);
}

.nav__brand:hover {
  transform: scale(1.04);
}

.nav__brand img {
  width: auto;
  height: 52px;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__list {
  display: flex;
  gap: 8px;
}

.nav__link {
  position: relative;
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--sea);
  transform: scaleX(0);
  transition: transform 250ms var(--ease);
}

.nav__link:hover {
  color: var(--sea);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__phone {
  display: none;
}

.nav__toggle {
  display: none;
  position: relative;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease);
}

.nav__toggle:hover {
  background: var(--mist);
}

.nav__toggle-bars,
.nav__toggle-bars::before,
.nav__toggle-bars::after {
  position: absolute;
  left: 13px;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 250ms var(--ease), opacity var(--dur) var(--ease);
}

.nav__toggle-bars {
  top: 23px;
}

.nav__toggle-bars::before,
.nav__toggle-bars::after {
  content: "";
  left: 0;
}

.nav__toggle-bars::before {
  transform: translateY(-7px);
}

.nav__toggle-bars::after {
  transform: translateY(7px);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bars {
  background: transparent;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bars::before {
  transform: rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bars::after {
  transform: rotate(-45deg);
}

@media (max-width: 959px) {
  .topbar {
    display: none;
  }

  .nav {
    min-height: 64px;
  }

  .nav__brand img {
    height: 44px;
  }

  .js .nav__toggle {
    display: block;
  }

  /* Sans JavaScript, le menu reste affiché en ligne sous le logo. */
  .nav {
    flex-wrap: wrap;
  }

  .nav__menu {
    flex-wrap: wrap;
    gap: 12px;
    padding-bottom: 12px;
  }

  .js .nav {
    flex-wrap: nowrap;
  }

  .js .nav__menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: grid;
    gap: 16px;
    padding: 16px var(--gutter) 24px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 24px rgba(28, 36, 48, .08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease), transform 250ms var(--ease), visibility 0s linear 250ms;
  }

  .js .nav__menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s;
  }

  .js .nav__list {
    display: grid;
    gap: 2px;
  }

  .js .nav__link {
    padding: 12px;
    font-size: 1.125rem;
  }

  .js .nav__link:hover {
    background: var(--mist);
  }

  .js .nav__link::after {
    display: none;
  }

  .nav__phone {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    font-weight: 700;
    text-decoration: none;
    color: var(--sea);
  }
}