/* ==========================================================================
   HEADER — barre en verre flottante
   ========================================================================== */
header {
  position: sticky;
  top: 18px;
  z-index: 50;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 0.5s var(--ease-out), border-color 0.5s,
    box-shadow 0.5s, backdrop-filter 0.5s;
}

.nav-bar--scrolled {
  background: rgba(13, 8, 34, 0.62);
  border-color: var(--stroke);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 18px 40px -20px rgba(0, 0, 0, 0.7);
}

.nav-bar__brand img {
  width: 148px;
  transition: transform 0.4s var(--ease-out);
}

.nav-bar__brand:hover img {
  transform: scale(1.03);
}

/* ---------- Liens ---------- */
.nav-bar__elements {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-bar__link {
  position: relative;
  padding: 10px 16px;
  font-weight: 500;
  font-size: 0.95rem;
  color: rgba(244, 242, 255, 0.75);
  border-radius: 999px;
  transition: color 0.35s, background 0.35s;
}

.nav-bar__link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease-out);
}

.nav-bar__link:hover {
  color: var(--ink);
}

.nav-bar__link:hover::after,
.nav-bar__link.is-active::after {
  transform: scaleX(1);
}

.nav-bar__link.is-active {
  color: var(--ink);
}

.nav-bar__cta {
  margin-left: 10px;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  color: #0a0620;
  background: var(--grad-brand);
  box-shadow: 0 8px 24px -8px rgba(92, 200, 248, 0.55);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s;
  white-space: nowrap;
}

.nav-bar__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -8px rgba(92, 200, 248, 0.75);
}

/* ---------- Burger ---------- */
.nav-bar__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: var(--glass);
  border: 1px solid var(--stroke);
  border-radius: 12px;
  padding: 12px 11px;
  cursor: pointer;
}

.nav-bar__burger span {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.35s var(--ease-out), opacity 0.35s;
}

.nav-bar__burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-bar__burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-bar__burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Mobile ---------- */
@media (max-width: 1023px) {
  .nav-bar__burger {
    display: flex;
  }

  .nav-bar__elements {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    flex-direction: column;
    align-items: stretch;
    min-width: 240px;
    padding: 16px;
    gap: 4px;
    border-radius: 20px;
    background: rgba(13, 8, 34, 0.85);
    border: 1px solid var(--stroke);
    backdrop-filter: blur(24px) saturate(140%);
    -webkit-backdrop-filter: blur(24px) saturate(140%);
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.8);

    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
    transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out),
      visibility 0.4s;
  }

  .nav-bar__elements.visible {
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .nav-bar__link {
    padding: 13px 16px;
  }

  .nav-bar__link::after {
    display: none;
  }

  .nav-bar__link:hover,
  .nav-bar__link.is-active {
    background: rgba(255, 255, 255, 0.07);
  }

  .nav-bar__cta {
    margin: 8px 4px 0;
    text-align: center;
  }
}