/* ==========================================================================
   header.css — fixed site header (transparent over hero, dark on scroll).
   The wordmark logo is white, so the header chrome is always dark.
   ========================================================================== */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 300;
  background: #fff; color: #000; padding: 0.6rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; top: 0; }

.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.is-scrolled {
  background: rgba(16, 16, 16, 0.92);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.28);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; min-height: var(--header-h);
}
.site-header__logo { display: flex; align-items: center; flex: 0 0 auto; }
.site-header__logo img { height: 40px; width: auto; }

.site-nav { display: flex; align-items: center; gap: 2rem; }
.site-nav__list { display: flex; align-items: center; gap: 1.5rem; }
.site-nav__list a {
  font-family: var(--font-display); font-weight: var(--fw-medium);
  font-size: 1rem; color: #fff; letter-spacing: 0.02em; padding: 0.4rem 0;
  position: relative;
}
.site-nav__list a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px;
  height: 2px; background: var(--color-brand); transition: right var(--transition);
}
.site-nav__list a:hover { color: #fff; }
.site-nav__list a:hover::after { right: 0; }

.site-nav__social { display: flex; align-items: center; gap: 0.75rem; }
.site-nav__social a { color: #fff; display: inline-flex; }
.site-nav__social a:hover { color: var(--color-brand); }

/* Header "Book a Lesson" CTA — compact to sit inline with the nav */
.site-header__cta {
  padding: 0.4rem 0.95rem; font-size: 0.8rem; border-width: 1.5px;
  box-shadow: 0 0 10px var(--color-brand-glow); white-space: nowrap;
}
.site-header__cta:hover { box-shadow: 0 0 16px rgba(196,23,33,0.55); }

/* Mobile hamburger */
.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; padding: 0; border: 0; background: transparent; cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; width: 26px; background: #fff; border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1024px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(16, 16, 16, 0.98);
    padding: 0.5rem 0 1.25rem;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
    transform: translateY(-120%); transition: transform 260ms ease;
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  .site-nav.is-open { transform: translateY(0); }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__list a { padding: 0.9rem var(--gutter); font-size: 1.1rem; }
  .site-nav__list a::after { display: none; }
  .site-nav__list li + li a { border-top: 1px solid rgba(255, 255, 255, 0.08); }
  .site-nav__social { padding: 1rem var(--gutter) 0; gap: 1.25rem; }
  .site-header__cta { margin: 1.1rem var(--gutter) 0.25rem; }
  /* header is solid whenever the mobile menu is open */
  .site-header.nav-open { background: rgba(16, 16, 16, 0.98); }
}