/* =========================================================
   HEADER — Refined, sticky, cinematic
   ========================================================= */

.header-container {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--color-border);

  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem clamp(1.25rem, 4vw, 3rem);
  box-sizing: border-box;
  min-height: 88px;
}

/* Logo */
.header-left {
  display: flex;
  align-items: center;
}

.header-left img,
.header-left svg {
  height: 110px;
  width: auto;
  color: var(--color-accent);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  display: block;
}

.header-left img {
  /* Legacy PNG fallback — render in pure white */
  filter: brightness(0) invert(1);
}

.header-left:hover img,
.header-left:hover svg {
  transform: scale(1.04);
  opacity: 0.88;
}

/* Navigation */
.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-right button {
  position: relative;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 0.65rem 1rem;
  cursor: pointer;
  transition: color var(--transition-base);
}

.header-right button::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.4rem;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

.header-right button:hover {
  color: var(--color-accent);
}

.header-right button:hover::after {
  transform: scaleX(1);
}

.header-right button:focus-visible {
  outline: none;
  color: var(--color-accent);
}

.header-right button:focus-visible::after {
  transform: scaleX(1);
}

/* Active page — replaces the old inline black background */
.header-right button.is-active,
.header-right button[style*="background-color: black"] {
  background: transparent !important;
  color: var(--color-accent) !important;
}

.header-right button.is-active::after,
.header-right button[style*="background-color: black"]::after {
  transform: scaleX(1);
}

/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    min-height: auto;
  }

  .header-left img,
  .header-left svg {
    height: 72px;
  }

  .header-right {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.1rem;
  }

  .header-right button {
    padding: 0.5rem 0.65rem;
    font-size: 0.72rem;
    letter-spacing: 0.18em;
  }

  .header-right button::after {
    left: 0.65rem;
    right: 0.65rem;
  }
}