/* ================================================================
   HEADER — ERdigIA Premium
   ================================================================ */
#er-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 9999;
  height: 72px;
  display: flex;
  align-items: center;
  background: rgba(5,7,13,0.6);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: all .4s var(--ease);
}
#er-header.scrolled {
  background: rgba(5,7,13,0.92);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.er-header-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 48px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

/* Logo */
.er-header-logo { flex-shrink: 0; }
.er-header-logo a { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.er-header-logo img { height: 36px; width: auto; filter: brightness(1.1); }
.er-header-logo:hover img { filter: brightness(1.2) drop-shadow(0 0 12px rgba(0,212,255,.6)); transition: filter .3s; }

/* Nav */
.er-nav { flex: 1; display: flex; align-items: center; justify-content: center; }
.er-header-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.er-header-nav > li { position: relative; }
.er-header-nav > li > a {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px 16px;
  font-family: var(--f-display);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--t-muted);
  text-decoration: none;
  border-radius: var(--r-md);
  transition: var(--t-fast);
  white-space: nowrap;
}
.er-header-nav > li > a:hover,
.er-header-nav > li.current-menu-item > a,
.er-header-nav > li.current-menu-ancestor > a {
  color: var(--t-bright);
  background: rgba(255,255,255,.06);
}
.er-header-nav > li.current-menu-item > a { color: var(--cyan); }

/* Flèche dropdown */
.er-header-nav > li.menu-item-has-children > a::after {
  content: '';
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: .5;
  transition: transform .2s;
}
.er-header-nav > li.menu-item-has-children:hover > a::after { transform: rotate(-180deg); opacity: 1; }

/* Sous-menu dropdown premium */
.er-header-nav ul.sub-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 220px;
  background: rgba(11,20,32,0.97);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 8px;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  box-shadow: 0 24px 60px rgba(0,0,0,0.8), 0 0 0 1px rgba(0,212,255,.08);
  z-index: 10000;
}
.er-header-nav ul.sub-menu::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-bottom-color: rgba(0,212,255,.2);
}
.er-header-nav > li:hover > ul.sub-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.er-header-nav ul.sub-menu > li > a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--f-body);
  font-size: .88rem;
  color: var(--t-muted);
  text-decoration: none;
  border-radius: var(--r-sm);
  transition: var(--t-fast);
  letter-spacing: 0;
  text-transform: none;
}
.er-header-nav ul.sub-menu > li > a::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
  transition: background .2s;
}
.er-header-nav ul.sub-menu > li > a:hover {
  color: var(--cyan);
  background: rgba(0,212,255,.08);
}
.er-header-nav ul.sub-menu > li > a:hover::before { background: var(--cyan); }

/* CTA Header */
.er-btn-header {
  flex-shrink: 0;
  padding: 10px 24px;
  font-family: var(--f-display);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  background: var(--grad-main);
  color: #05070d !important;
  border: none;
  border-radius: var(--r-md);
  text-decoration: none;
  transition: var(--t-base);
  box-shadow: 0 2px 16px rgba(0,212,255,.3);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.er-btn-header:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0,212,255,.5);
}

/* Toggle mobile */
.er-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  cursor: pointer;
  flex-shrink: 0;
  transition: var(--t-fast);
}
.er-mobile-toggle:hover { border-color: var(--border-hov); }
.er-mobile-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--t-main);
  border-radius: 2px;
  transition: all .3s;
}
.er-mobile-toggle.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.er-mobile-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.er-mobile-toggle.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Menu mobile */
.er-mobile-menu {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0; bottom: 0;
  background: rgba(5,7,13,0.97);
  backdrop-filter: blur(24px);
  z-index: 9998;
  overflow-y: auto;
}
.er-mobile-menu.open { display: block; animation: er-slideDown .3s var(--ease); }
@keyframes er-slideDown { from { opacity:0; transform:translateY(-10px); } to { opacity:1; transform:translateY(0); } }
.er-mobile-menu-inner {
  padding: 32px 32px 48px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.er-mobile-menu-inner > a {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  font-family: var(--f-display);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--t-muted);
  text-decoration: none;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: var(--t-fast);
}
.er-mobile-menu-inner > a:hover { color: var(--cyan); background: rgba(0,212,255,.06); border-color: var(--border); }
.er-mobile-submenu {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 4px 0 4px 16px;
  padding: 12px;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
.er-mobile-submenu a {
  padding: 10px 12px;
  font-size: .8rem;
  color: var(--t-muted);
  text-decoration: none;
  border-radius: var(--r-sm);
  transition: var(--t-fast);
  display: block;
}
.er-mobile-submenu a:hover { color: var(--cyan); background: rgba(0,212,255,.08); }

/* Padding pour page content sous header fixe */
body > *:first-child { padding-top: 0; }
#er-main-content, main.er-page-content { padding-top: 72px; }

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1100px) {
  .er-header-nav { gap: 0; }
  .er-header-nav > li > a { padding: 8px 11px; font-size: .64rem; }
}
@media (max-width: 900px) {
  .er-nav { display: none; }
  .er-mobile-toggle { display: flex; }
  .er-header-inner { padding: 0 24px; }
}
@media (max-width: 600px) {
  .er-mobile-submenu { grid-template-columns: 1fr; }
}