/* ============================================ */
/* nav.css — Menu de navigation commun          */
/* Autonome : ne dépend pas des variables de    */
/* style.css / style2.css                       */
/* ============================================ */

:root {
  --nav-bg-start:   #4d84b0;
  --nav-bg-end:     #274863;
  --nav-text:       rgba(255, 255, 255, 0.88);
  --nav-text-hover: #ffffff;
  --nav-accent:     darkkhaki;
  --nav-radius:     4px;
}

.site-nav {
  background: linear-gradient(120deg, var(--nav-bg-start), var(--nav-bg-end));
  font-family: sans-serif, helvetica, verdana;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 100;
}

.site-nav-inner {
  max-width: 70em;
  margin: 0 auto;
  padding: 0.6em 1.5em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
}

.site-nav-brand {
  color: #fff;
  font-variant: small-caps;
  font-size: 1.35em;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
}
.site-nav-brand:hover { text-decoration: none; color: #fff; }

/* ── Liens (desktop) ─────────────────────────── */
.site-nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.2em;
  margin: 0;
  padding: 0;
}

.site-nav-links a {
  display: inline-block;
  color: var(--nav-text);
  text-decoration: none;
  padding: 0.55em 0.9em;
  border-radius: var(--nav-radius);
  border-bottom: 3px solid transparent;
  font-size: 0.95em;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.site-nav-links a:hover {
  background-color: rgba(255, 255, 255, 0.14);
  color: var(--nav-text-hover);
  text-decoration: none;
}

.site-nav-links a.active {
  color: #fff;
  font-weight: 600;
  border-bottom-color: var(--nav-accent);
}

/* ── Bouton hamburger (mobile) ───────────────── */
.site-nav-toggle {
  display: none;
  width: 2.2em;
  height: 2.2em;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.site-nav-toggle span {
  display: block;
  width: 1.5em;
  height: 2px;
  background-color: #fff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.site-nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================ */
/* RESPONSIVE — mobile (≤ 700px)                */
/* ============================================ */
@media (max-width: 700px) {
  .site-nav-toggle { display: flex; }

  .site-nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--nav-bg-end);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }

  .site-nav-links.open {
    max-height: 20em;
  }

  .site-nav-links a {
    border-radius: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    padding: 0.9em 1.5em;
  }

  .site-nav-links a.active {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    border-left: 4px solid var(--nav-accent);
    background-color: rgba(255, 255, 255, 0.08);
  }
}