/* ============================================================
   HEADER.CSS – Nozomi Japan site header styles
   ============================================================ */

/* ── Site Header ─────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 8rem;
  backdrop-filter: blur(1rem);
  -webkit-backdrop-filter: blur(1rem);
  background: var(--white-rgba);
  transition: var(--transition);
}

.site-header.scrolled {
  position: fixed;
  box-shadow: 0 0.1rem 0.5rem var(--black-rgba);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: var(--white);
}

.site-header .container {
  height: 100%;
}

.site-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: inherit;
  position: relative;
}

/* ── Logo ──────────────────────────────────────────────────── */
.site-header .header-logo {
  position: absolute;
  left: 0;
  top: 1.6rem;
  display: block;
  width: 10rem;
  height: 10rem;
  transition: var(--transition);
  text-decoration: none;
}
.site-header.scrolled .header-logo {
  top: 0.48rem;
  width: 7rem;
  height: 7rem;
}


/* ── Nav Links ─────────────────────────────────────────────── */
.site-header .header-nav ul {
  display: flex;
  align-items: center;
  gap: 0;
}

.site-header .header-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.6rem;
  font-size: 1.6rem;
  font-weight: 400;
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition);
  color: var(--color-black);
}

.site-header .header-nav a:hover {
  color: var(--color-red);
}

/* ── CTA Button ────────────────────────────────────────────── */
.site-header .header-cta {
  flex-shrink: 0;
  margin-left: 2rem;
}

/* ── Hamburger (mobile) ────────────────────────────────────── */
.site-header .hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  width: 4rem;
  height: 4rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  z-index: 200;
}

.site-header .hamburger span {
  display: block;
  width: 2.4rem;
  height: 0.2rem;
  background: var(--color-black);
  border-radius: 0.2rem;
  transition: var(--transition);
  transform-origin: center;
}

.site-header .hamburger.active span:nth-child(1) {
  transform: translateY(0.7rem) rotate(45deg);
}

.site-header .hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.site-header .hamburger.active span:nth-child(3) {
  transform: translateY(-0.7000rem) rotate(-45deg);
}

/* ── Mobile nav overlay ────────────────────────────────────── */
@media (max-width: 1024px) {
  .site-header {
    padding: 0 2.4rem;
    height: 7rem;
    gap: 1.6rem;
  }

  .site-header .header-logo {
    left: 2.4rem;
    width: 7rem;
    height: 7rem;
  }

  .site-header .hamburger {
    display: flex;
  }

  .site-header .header-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 28rem;
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 10rem 3.2rem 4rem;
    gap: 0.8rem;
    transition: var(--transition);
    box-shadow: -0.40rem 0 3rem rgba(0, 0, 0, 0.15);
    z-index: 150;
  }

  .site-header .header-nav.open {
    right: 0;
  }

  .site-header .header-nav a {
    width: 100%;
    padding: 1.2rem 0;
    font-size: 1.8rem;
    border-bottom: 0.1rem solid rgba(0, 0, 0, 0.08);
  }

  .site-header .header-cta {
    display: none;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: 0 2rem;
  }

  .site-header .header-logo {
    left: 2rem;
    width: 6rem;
    height: 6rem;
  }
}