.sr-only {
   position: absolute;
   left: 30%;
   transform: translateX(-50%);
   top: -100px;
   overflow: hidden;
   display: inline;
   background-color: white;
   padding: 5px 10px;
   font-size: var(--x);
   transition: all ease-in-out 0.2s;
   z-index: 50;
   border-radius: 10px;
   color: black;
}

.sr-only:focus {
  left: 30%;
  transform: translateX(-50%);
  top: 38px;
}



 
/* ==== BURGER (mobile only) ==== */
.nav-toggle, .nav-toggle-label {
  display: none;
}

.nav-toggle-label {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  cursor: pointer;
  min-width: 48px;
  min-height: 48px;
}

.burger {
  display: block;
  position: relative;
  width: 25px;
  height: 3px;
  background: var(--c-1);
  border-radius: 2px;
  transition: background 0.2s ease-in-out;
}

.burger::before,
.burger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 25px;
  height: 3px;
  background: var(--c-1);
  border-radius: 2px;
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55),
    top 0.3s ease, bottom 0.3s ease;
}

.dark-mode-menu .burger,
.dark-mode-menu .burger::before,
.dark-mode-menu .burger::after  { background: var(--n-5);}

.burger::before {   top: -9px; }
.burger::after {   bottom: -9px; }

.nav-toggle:checked + .nav-toggle-label .burger {   width: 28px;   background: transparent; }
.nav-toggle:checked + .nav-toggle-label .burger::before {   width: 28px;   transform: rotate(45deg);   top:0px; }
.nav-toggle:checked + .nav-toggle-label .burger::after {   width: 28px;   transform: rotate(-45deg);   top: 0.5px; }



/* ==== NAVIGATION STRUCTURE ==== */

 header {  padding-block: 0;  gap: 0;}
 
nav {
  width: 100%;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 5;
  font-family: "Poppins", sans-serif;

}

.logo {
  display: block;
  width: 150px;
  aspect-ratio: 5 / 1;
  background: url(../media/logo_couleur.svg) center/contain no-repeat;
}

.dark-mode-menu .logo  {  background: url(../media/logo_blanc.svg) center/contain no-repeat;}

.nav-menu {
  display: flex;
  gap: var(--125x);
  align-items: center;
  padding-block: var(--150x);
}

.nav-item {
  position: relative;
}


.nav-item a,
.nav-item summary {
  display: block;
  padding-block: 4px;
  font-size: var(--85x);
  color: var(--c-1);
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  opacity : 0.8;
}



.nav-item summary {
  padding-right: 15px;
}

.nav-item a:hover,
.nav-item summary:hover,
#menu-2 .nav-item2 summary, 
#menu-3 .nav-item3 summary, 
#menu-4 .nav-item4 a,
#menu-5 .nav-item4 a
{
  opacity: 1;
}


.menu-1 .nav-item1 summary, 
.menu-2 .nav-item2 summary, 
.menu-3 .nav-item3 a
{
  opacity: 1;
  font-weight: 600;
  
}



/* ==== SUBMENUS ==== */

.nav-submenu {
  position: absolute;
  top: calc(100% + var(--x));
  left: 0px;
  display: flex;
  flex-direction: column;
  gap: var(--50x);
  background-color: white;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.8);
  min-width: 250px;
  z-index: 15;
  border-radius: 4px;
  overflow: hidden;
  padding-block: 20px;
}

.nav-item3 .nav-submenu { padding-block: 20px;   } 

.nav-submenu a {
  font-size: var(--85x);
  color : var(--c-1);
  transition: all 0.2s ease;
  padding-inline: 20px;
  border-left: 0px solid rgba(255, 255, 255, 0);
  opacity: 1;
}

.nav-submenu a:hover {
  border-left: 5px solid var(--c-9);
}

nav summary::before {
  content: '';   position: absolute;   top: 50%;   right: 0;   transform: translateY(-50%) rotate(0deg);
  transition: transform 0.3s ease;   width: 0;   height: 0;
  border-left: 4px solid transparent;   border-right: 4px solid transparent;   border-top: 6px solid var(--c-1); /* triangle pointant vers le bas */
}



/* Rotation quand le <details> est ouvert */
nav details[open] summary::before {
  transform: translateY(-50%) rotate(180deg);
}


/* ==== SAFE BUTTON ==== */

.nav-item.incident a {
  
  color: var(--n-5);
  border-radius: 100px;
  padding-block: var(--50x);
  padding-inline:  var(--x) 50px;
  background-image: url(../media/picto_alert.svg);
  background-repeat: no-repeat;
  background-size: 20px;
  background-position: right 15px center;
  text-align: center;
  opacity: 1;
  transition: background ease-in-out 150ms;
  background-color: var(--c-4);
  border: 1px solid var(--c-9);
  
}

.dark-mode-menu .nav-item.incident a {  background-color: rgba(0, 0, 0, 0.5);}

.nav-item.incident a:hover {
  color: white;
  background-color: var(--c-2);
}



/* ==== MOBILE STYLE ==== */
@media (max-width: 1000px) {
  
  
.logo  {  width: 180px; }
 
 header .container {width: 100%; }
 
  nav {
    max-width: 100%;
    padding-block: 30px;
    padding-inline: calc( calc(100% - var(--content-max-width)) / 2);
  }
  
  .logo {
    width: 100px;
    aspect-ratio: 5 / 1;
  }
  
  .nav-toggle-label {
    display: flex;
    min-width: 48px;
    min-height: 48px;
  }


.nav-menu .nav-item {
    opacity: 0;
    transition: opacity linear 200ms 200ms;
    pointer-events: none;
  }
  
  
.nav-toggle:checked ~ .nav-menu .nav-item {
    opacity: 1;
    pointer-events: auto;
  }
  
  
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    background: white;
    box-shadow: 0 150px 400px rgba(0, 0, 0, 0.65);
    padding: 2rem 5%;
    transform: scale(1, 0);
    transform-origin: top;
    transition: transform 0.2s ease-in-out;
    z-index: 100;
  }

  .nav-toggle:checked ~ .nav-menu {
    transform: scale(1, 1);
  }

  .nav-item {
    width: 100%;
    border-top: 1px solid rgb(215, 215, 215); 
  }
  
  .nav-item a, 
  .nav-item summary {
    padding-inline: 0;
    padding: 18px 0 7px 0;
    color : var(--c-1);
  }

  
  .nav-item.incident a, 
  .nav-item.incident a:hover   {
    margin-top: 30px;
    padding : 7px;
    box-shadow: 0 0 0 0;
    color: var(--n-5);
    background-color: var(--c-4);
  }
  
  .nav-item.incident a:hover  {background-color: var(--c-2);}
   
  .nav-item:hover::after,
  .nav-item:has(details[open])::after,
  #menu-2 .nav-item2::after,
  #menu-3 .nav-item3::after,
  #menu-4 .nav-item4::after {
    width: 0;
  }
  
 
  summary::before {
    top: 30px;
    right: 2px;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 8px solid var(--c-1); 
}
  
  .nav-submenu {
    position: static;
    padding: 0; 
    display: flex;
    flex-direction: column;
    box-shadow: none;
    border-radius: 0;
    gap: var(--x);
    padding-block: var(--x);
  }

  .nav-submenu a  {
    padding-block: 0px;
    padding-left: 10px;
    font-weight: 400;  
    opacity: 0.6;
    font-size: var(--x);
    line-height: 120%;
    border-left : 5px solid var(--n-2);
  }
  
  .nav-submenu a:hover {
    padding-left: 12px;
    opacity: 1;
    border-left : 5px solid var(--c-9);
  }

}


/* ==== DESKTOP STYLE ==== */
@media (min-width: 1000px) {
  .nav-toggle-label {
    display: none;
  }

  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    transform: none !important;
  }
  
  .dark-mode-menu nav summary::before  { border-top: 6px solid var(--n-5); }
  
  .dark-mode-menu .nav-item > a,
  .dark-mode-menu .nav-item summary {
    color: var(--n-5);
  }
  
}