/* ATLAS WORLDS — NAV */
/* ===================== NAV ===================== */

.top {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 18px var(--gutter);
  background: linear-gradient(to bottom, rgba(11,14,23,.92), rgba(11,14,23,.65) 70%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  transition: background .3s, border-color .3s;
}
.top .brand {
  display: flex; align-items: center; gap: 14px;
  font-family: var(--display);
  letter-spacing: 0.18em;
}
.top .brand img {
  width: 46px; height: 46px;
  object-fit: contain;
  filter: drop-shadow(0 0 10px rgba(45,79,163,0.3));
}
.top .brand .name {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  line-height: 1;
  gap: 4px;
}
.top .brand .name small {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.28em;
  color: var(--brass);
  font-weight: 400;
}
.top nav {
  display: flex;
  gap: 36px;
  margin-left: auto;
  margin-right: 32px;
}
.top nav a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  position: relative;
  padding: 6px 0;
  transition: color .2s;
}
.top nav a::after {
  content: "";
  position: absolute; left: 0; right: 100%;
  bottom: 0; height: 1px;
  background: var(--brass);
  transition: right .3s ease;
}
.top nav a:hover { color: var(--ink); }
.top nav a:hover::after { right: 0; }

.top .util { display: flex; gap: 2px; align-items: center; }
.top .lang {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  padding: 7px 11px;
  cursor: pointer;
  transition: all .2s;
}
.top .lang:first-of-type { border-right: none; }
.top .lang.active { background: var(--brass); color: var(--bg-deep); border-color: var(--brass); }
.top .lang:hover:not(.active) { color: var(--ink); border-color: var(--rule-s); }

/* Burger — hidden by default, shown on mobile via responsive.css */
.top .burger {
  display: none;
  margin-left: 12px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--rule);
  cursor: pointer;
  padding: 0;
  position: relative;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: border-color .2s;
}
.top .burger:hover { border-color: var(--rule-s); }
.top .burger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform .3s, opacity .2s;
  transform-origin: center;
}
.top .burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}
.top .burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.top .burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* Mobile menu sheet */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(5,7,13,0.98), rgba(11,14,23,0.98));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-12px);
  transition: opacity .35s ease, transform .35s ease;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.mobile-menu .mm-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 96px 32px 48px;
  width: 100%;
  max-width: 520px;
  position: relative;
}
.mobile-menu .mm-deco {
  font-family: var(--display);
  font-size: 64px;
  color: var(--brass);
  opacity: 0.18;
  margin-bottom: 24px;
  line-height: 1;
}
.mobile-menu .mm-link {
  display: flex;
  align-items: baseline;
  gap: 18px;
  width: 100%;
  padding: 16px 8px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--display);
  font-size: 22px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  transition: color .2s, padding-left .25s;
}
.mobile-menu .mm-link:hover,
.mobile-menu .mm-link:focus {
  color: var(--brass-hi);
  padding-left: 14px;
}
.mobile-menu .mm-link .rn {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--brass);
  letter-spacing: 0.22em;
  min-width: 28px;
  text-align: right;
}
.mobile-menu .mm-foot {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.mobile-menu .mm-foot .tricolor {
  display: inline-flex;
  height: 14px;
  border: 1px solid var(--rule);
}
.mobile-menu .mm-foot .tricolor span {
  width: 10px;
  display: block;
}
.mobile-menu .mm-foot .tricolor .b { background: var(--tri-bleu); }
.mobile-menu .mm-foot .tricolor .w { background: var(--tri-blanc); }
.mobile-menu .mm-foot .tricolor .r { background: var(--tri-rouge); }

/* Lock body scroll when menu open */
body.menu-open {
  overflow: hidden;
}