/* =====================================================
   NUCLEUS — HEADER & NAV
   Structure souple — modifier les variables pour reconfigurer
===================================================== */

/* ---------------------------------
   Variables locales header
   Toucher ici pour reconfigurer sans réécrire
---------------------------------- */

:root {
  --header-direction: column;
  --header-justify: space-between;
  --header-align: center;
  --header-gap: var(--spacing-sm);
  --header-padding: var(--spacing-xs) var(--spacing-md);
  --header-logo-height: 52px;
  --header-bg: var(--color-primary);
}

/* ---------------------------------
   Block principal
---------------------------------- */


.site-header {
  background: var(--header-bg);
  display: flex;
  flex-direction: var(--header-direction);
  justify-content: var(--header-justify);
  align-items: var(--header-align);
  gap: var(--header-gap);
  padding: var(--header-padding);
  width: 100%;
}

/* ---------------------------------
   Logo
---------------------------------- */
/* Header */
.site-header .decor-logo {
  --logo-fill: var(--color-accent);
  --logo-stroke: var(--color-primary-dark);
}

.site-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-header__logo img {
  height: var(--header-logo-height);
  width: auto;
  display: block;
  transition: transform var(--transition);
}

.site-header__logo:hover img {
  transform: scale(1.02);
}

/* ---------------------------------
Titre header
-----------------------------------*/
.header-title {
    display:         flex;
    justify-content: center;
    align-items:     center;
    width:           100%;
}

.site-header .decor-logo {
    height: 60px;
}


/* ---------------------------------
   Nav
---------------------------------- */

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
}

.nav__link {
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-base);
  font-weight: 500;
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-decoration: none;
  padding: 1rem 1.5rem;
  position: relative;
  transition: color var(--transition);
}

.nav__link:hover {
  color: white;
}

/* Soulignement animé */
.nav__link::after {
  content: "";
  position: absolute;
  bottom: 0.7rem;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 40%;
}

.nav__link--active {
  color: white;
  font-weight: 600;
}

/* ---------------------------------
   Controls — langue + burger
---------------------------------- */

.site-header__controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
}

/* ---------------------------------
   Sélecteur de langue
---------------------------------- */

.lang-switcher {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.lang-switcher a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 1px;
  text-decoration: none;
  transition: color var(--transition);
}

.lang-switcher a:hover {
  color: white;
}

.lang-switcher a.lang--active {
  color: white;
  font-weight: 600;
  border-bottom: 1px solid var(--color-accent);
}

/* ---------------------------------
   Burger — masqué desktop
---------------------------------- */

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.burger__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.burger--open .burger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger--open .burger__bar:nth-child(2) {
  opacity: 0;
}

.burger--open .burger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* =================================
   MOBILE — max 768px
================================= */

@media (max-width: 768px) {

  .site-header {
    flex-wrap: wrap;
    padding: var(--spacing-sm);
  }

  .site-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    order: 3;
  }

  .site-nav--open {
    display: flex;
  }

  .nav__link {
    width: 100%;
    text-align: center;
    padding: 1.2rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav__link::after {
    display: none;
  }

  .burger {
    display: flex;
  }

  .site-header__logo {
    order: 1;
  }

  .site-header__controls {
    order: 2;
  }
}