/* EN-TÊTE : barre fixe en haut, navigation, menu mobile. */

.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 50;
  transition: background var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--canvas) 92%, transparent);
  border-bottom-color: var(--border);
  backdrop-filter: blur(8px);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s4);
  height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s3);
  color: var(--text-1);
  text-decoration: none;
  font: 600 var(--fs-sm)/1 var(--font-label);
  letter-spacing: 0.32em;
  min-height: var(--s11);
}
.brand svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
}
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--s2);
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: var(--s11);
  padding: 0 var(--s3);
  color: var(--text-3);
  text-decoration: none;
  font: 500 var(--fs-2xs)/1 var(--font-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color var(--dur-fast) var(--ease);
}
.nav-link:hover {
  color: var(--text-2);
}
.nav-link[aria-current="true"] {
  color: var(--text-1);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: var(--s3);
  right: var(--s3);
  bottom: 10px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--dur-base) var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 8px;
  width: 5px;
  height: 5px;
  margin-left: -2.5px;
  background: var(--accent);
  transform: rotate(45deg) scale(0);
  transition: transform var(--dur-base) var(--ease);
}
.nav-link[aria-current="true"]::after {
  transform: scaleX(1);
}
.nav-link[aria-current="true"]::before {
  transform: rotate(45deg) scale(1);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--s2);
}
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: var(--s11);
  height: var(--s11);
  color: var(--text-2);
  background: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.icon-btn:hover {
  color: var(--accent);
  border-color: var(--border-accent);
}
.icon-btn[aria-pressed="true"] {
  color: var(--info);
  border-color: var(--info);
}
.icon-btn svg {
  width: 18px;
  height: 18px;
}
.menu-btn {
  display: none;
}
@media (max-width: 1023px) {
  .menu-btn {
    display: inline-grid;
  }
  .primary-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--border);
    padding: var(--s2) max(var(--gutter), env(safe-area-inset-right, 0px)) var(--s4) max(var(--gutter), env(safe-area-inset-left, 0px));
  }
  .primary-nav[data-open="false"] {
    display: none;
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-link {
    padding: 0;
    font-size: var(--fs-xs);
  }
  .nav-link::after, .nav-link::before {
    display: none;
  }
  .nav-link[aria-current="true"] {
    color: var(--accent);
  }
  .header-cta {
    display: none;
  }
}