/* -------------------------------------------------------- */
/* header.css – Styles du header et navigation             */
/* -------------------------------------------------------- */

header {
  background: linear-gradient(to right, #0055A4 0%, #ffffff 17%, #ffffff 83%, #EF4135 100%);
  padding: 15px 20px;
  position: relative;
  z-index: 1000;
  perspective: 1000px;
}

.header-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

/* Logo et H1 invisible pour SEO */
.logo-link {
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}

.site-title {
  position: absolute;
  left: -9999px; /* H1 invisible mais SEO-friendly */
}

.site-logo {
  max-width: 420px;
  height: auto;
  display: block;
  transition: all 0.4s ease;
}

/* Effet lumière au survol du logo */
.logo-link:hover .site-logo {
  filter:
    drop-shadow(0 0 6px rgba(255,255,255,0.7))
    drop-shadow(0 0 12px rgba(0,191,255,0.6))
    drop-shadow(0 0 20px rgba(30,144,255,0.5));
  transform: scale(1.03);
}

/* Navigation */
nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
}

.menu-item button {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  font: inherit;
  padding: 0;
  text-shadow: 1px 1px 2px rgba(255,0,0,0.35);
  letter-spacing: 0.25px;
  background: linear-gradient(to right, #00bfff, #1e90ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 600;
  font-size: 1.1em;
}

.menu-item button:hover {
  -webkit-text-fill-color: #0066B9;
  background: none;
}

nav a {
  font-weight: 600;
  font-size: 1.1em;
  text-decoration: none;
  text-shadow: 1px 1px 2px rgba(255,0,0,0.35);
  letter-spacing: 0.25px;
  background: linear-gradient(to right, #00bfff, #1e90ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav a:hover {
  -webkit-text-fill-color: #0066B9;
  background: none;
}

/* Media queries pour logo responsive */
@media (max-width: 768px) {
  .site-logo {
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .site-logo {
    max-width: 220px;
  }
}

/* Media query pour nav mobile */
@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    gap: 15px;
  }
}