/* =====================================================================
   COMPOSANTS COMMUNS
   Layout global, header, identité et footer.
   ===================================================================== */

.page-layout {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  justify-content: flex-start;
}


/* ---------------------------------------------------------------------
   Header principal
   --------------------------------------------------------------------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(255, 255, 255, 0.45);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);

  transition:
    background-color 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.94);
  border-bottom-color: rgba(148, 163, 184, 0.32);
  box-shadow: 0 3px 14px rgba(15, 23, 42, 0.05);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header-inner {
  width: calc(100vw - 64px);
  min-height: 56px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: 24px;
  padding: 8px 0;
  margin: 0 auto;
}

/*
 * Identité Secret dans le header.
 * Les deux anciennes définitions .site-brand sont fusionnées ici :
 * le rendu effectif conservé est inline-flex avec un gap de 3px.
 */
.site-brand {
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 700;
  white-space: nowrap;
  justify-self: start;

  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.site-brand:hover {
  color: var(--accent);
}

.site-brand-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}


/* Navigation principale */
.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  justify-self: center;
}

.site-nav a {
  position: relative;
  color: #5f6b7a;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.site-nav a:hover {
  color: var(--accent);
}


/* Navigation secondaire */
.site-nav-secondary {
  display: flex;
  align-items: center;
  gap: 28px;
  justify-self: end;
}

.site-nav-secondary a {
  position: relative;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.site-nav-secondary a:hover {
  color: var(--accent);
}


/* Soulignement animé des liens du header */
.site-nav a::after,
.site-nav-secondary a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -7px;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width 0.2s ease;
}

.site-nav a:hover::after,
.site-nav-secondary a:hover::after {
  width: 100%;
}


/* ---------------------------------------------------------------------
   Responsive du header
   --------------------------------------------------------------------- */

@media (max-width: 700px) {
  .site-header-inner {
    width: calc(100vw - 24px);
    min-height: 104px;

    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;

    justify-content: center;
    align-items: center;
    row-gap: 6px;

    padding: 10px 0;
    margin: 0 auto;
  }

  .site-brand {
    grid-row: 1;
    justify-self: center;
  }

  .site-nav {
    grid-row: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    width: 100%;
  }

  .site-nav-secondary {
    grid-row: 3;
    justify-self: center;
  }

  .site-nav a,
  .site-nav-secondary a {
    font-size: 0.74rem;
    white-space: nowrap;
  }

  .page-layout {
    padding-top: 126px;
  }
}

@media (max-width: 480px) {
  .site-header-inner {
    width: calc(100vw - 24px);
  }

  .site-nav {
    gap: 8px;
  }

  .site-nav a {
    font-size: 0.72rem;
  }

  .site-brand-icon {
    width: 32px;
    height: 32px;
  }
}


/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */

.site-footer {
  width: 100%;
  padding: 24px 28px;

  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;

  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}

@media (max-width: 520px) {
  .site-footer {
    flex-direction: column;
    gap: 7px;
    padding: 22px 16px;
  }
}