.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(17, 17, 17, 0.1);
  background: rgba(251, 250, 247, 0.94);
  backdrop-filter: blur(18px);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

.site-header-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(calc(100% - 28px), 1120px);
  min-height: 68px;
  margin: 0 auto;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 10px;
  color: #111;
  text-decoration: none;
  font-size: 1.12rem;
  font-weight: 840;
  line-height: 1;
  white-space: nowrap;
}

.site-brand img {
  display: block;
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.site-brand-name-short { display: none; }

.site-nav-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
  gap: 18px;
}

.site-primary-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: #5d6470;
  font-size: 0.92rem;
  font-weight: 740;
  white-space: nowrap;
}

.site-primary-links a {
  padding: 8px 0;
  color: inherit;
  text-decoration: none;
}

.site-primary-links a:hover,
.site-primary-links a[aria-current="page"] {
  color: #111;
}

.site-primary-links a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.site-header-cta,
.site-mobile-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 17px;
  border-radius: 999px;
  color: #fff;
  background: #007aff;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 830;
  white-space: nowrap;
  box-shadow: 0 12px 28px rgba(0, 122, 255, 0.22);
}

.site-header-cta:hover,
.site-mobile-cta:hover { background: #006ee6; }

.site-menu-toggle,
.site-menu-backdrop,
.site-mobile-panel { display: none; }

.site-menu-toggle:focus-visible,
.site-header a:focus-visible {
  outline: 3px solid #005fc7;
  outline-offset: 3px;
}

.ambassador-banner {
  position: relative;
  z-index: 1100;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 48px;
  min-height: 62px;
  color: #fff;
  background:
    radial-gradient(circle at 18% -80%, rgba(95, 183, 255, 0.72), transparent 45%),
    linear-gradient(110deg, #102142 0%, #183f78 54%, #5144c9 100%);
  box-shadow: 0 10px 30px rgba(16, 33, 66, 0.2);
}

.ambassador-banner-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  gap: 14px;
  padding: 10px 18px 10px 66px;
  color: inherit;
  text-decoration: none;
}

.ambassador-banner-mark {
  display: grid;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  font-size: 1rem;
}

.ambassador-banner-copy {
  display: grid;
  min-width: 0;
  gap: 1px;
  line-height: 1.25;
}

.ambassador-banner-copy strong {
  font-size: 0.95rem;
  font-weight: 850;
  letter-spacing: 0.01em;
}

.ambassador-banner-copy > span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.82rem;
  font-weight: 620;
}

.ambassador-banner-action {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 6px;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  color: #17386d;
  background: #fff;
  font-size: 0.84rem;
  font-weight: 840;
  box-shadow: 0 8px 20px rgba(7, 19, 42, 0.18);
}

.ambassador-banner-link:hover .ambassador-banner-action { transform: translateY(-1px); }

.ambassador-banner-dismiss {
  display: grid;
  width: 48px;
  height: 100%;
  min-height: 48px;
  place-items: center;
  padding: 0;
  border: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.84);
  background: rgba(0, 0, 0, 0.08);
  font: inherit;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
}

.ambassador-banner-dismiss:hover { color: #fff; background: rgba(0, 0, 0, 0.18); }
.ambassador-banner-dismiss:focus-visible { outline: 3px solid #fff; outline-offset: -5px; }
.ambassador-banner-dismissed .ambassador-banner { display: none; }

@media (max-width: 980px) {
  .site-header-shell { min-height: 64px; }
  .site-primary-links,
  .site-header-cta { display: none; }

  .site-menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 42px;
    padding: 0 14px;
    border: 1px solid rgba(17, 17, 17, 0.12);
    border-radius: 999px;
    color: #111;
    background: #fff;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 820;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(17, 17, 17, 0.055);
  }

  .site-menu-toggle:focus-visible {
    outline: 3px solid #005fc7;
    outline-offset: 3px;
  }

  .site-menu-icon {
    position: relative;
    width: 16px;
    height: 12px;
  }

  .site-menu-icon::before,
  .site-menu-icon::after {
    content: "";
    position: absolute;
    left: 0;
    width: 16px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    transition: transform 160ms ease, top 160ms ease;
  }

  .site-menu-icon::before { top: 2px; }
  .site-menu-icon::after { top: 9px; }
  .site-menu-toggle[aria-expanded="true"] .site-menu-icon::before { top: 5px; transform: rotate(45deg); }
  .site-menu-toggle[aria-expanded="true"] .site-menu-icon::after { top: 5px; transform: rotate(-45deg); }

  .site-menu-backdrop {
    display: block;
    position: fixed;
    inset: 64px 0 0;
    z-index: 998;
    visibility: hidden;
    opacity: 0;
    background: rgba(17, 17, 17, 0.34);
    transition: opacity 160ms ease, visibility 160ms ease;
  }

  .site-mobile-panel {
    display: grid;
    position: fixed;
    top: 76px;
    right: 14px;
    left: 14px;
    z-index: 1001;
    max-height: calc(100dvh - 90px);
    gap: 12px;
    padding: 10px;
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    border: 1px solid rgba(17, 17, 17, 0.12);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.99);
    box-shadow: 0 24px 80px rgba(17, 17, 17, 0.2);
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
  }

  body.site-menu-open { overflow: hidden; }
  body.site-menu-open .site-menu-backdrop { visibility: visible; opacity: 1; }
  body.site-menu-open .site-mobile-panel { visibility: visible; opacity: 1; transform: translateY(0); pointer-events: auto; }

  .site-mobile-links { display: grid; }

  .site-mobile-links a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 50px;
    padding: 0 12px;
    border-bottom: 1px solid rgba(17, 17, 17, 0.08);
    color: #111;
    text-decoration: none;
    font-size: 1.02rem;
    font-weight: 760;
  }

  .site-mobile-links a:last-child { border-bottom: 0; }
  .site-mobile-links a::after { content: "›"; color: #8a9099; font-size: 1.35rem; font-weight: 500; }
  .site-mobile-links a[aria-current="page"] { color: #005fc7; background: rgba(0, 122, 255, 0.06); border-radius: 12px; }

  .site-mobile-cta {
    min-height: 52px;
    width: 100%;
    box-shadow: none;
  }

  .site-mobile-meta {
    display: flex;
    justify-content: center;
    padding: 2px 8px 5px;
    color: #5d6470;
    font-size: 0.82rem;
    font-weight: 700;
  }

  .site-mobile-meta a { color: inherit; text-underline-offset: 3px; }
}

@media (max-width: 640px) {
  .ambassador-banner {
    grid-template-columns: minmax(0, 1fr) 44px;
    min-height: 68px;
  }

  .ambassador-banner-link {
    justify-content: flex-start;
    gap: 10px;
    padding: 9px 10px 9px 12px;
  }

  .ambassador-banner-mark { width: 32px; height: 32px; }
  .ambassador-banner-copy strong { font-size: 0.88rem; }
  .ambassador-banner-copy > span { font-size: 0.74rem; }
  .ambassador-banner-action { min-height: 30px; padding: 0 10px; font-size: 0.76rem; }
  .ambassador-banner-dismiss { width: 44px; }
}

@media (max-width: 390px) {
  .ambassador-banner-copy > span { max-width: 28ch; }
  .ambassador-banner-action { padding: 0 9px; }
  .ambassador-banner-action > span { display: none; }
}

@media (max-width: 400px) {
  .site-brand-name-full { display: none; }
  .site-brand-name-short { display: inline; }
}

@media (prefers-reduced-motion: reduce) {
  .site-menu-icon::before,
  .site-menu-icon::after,
  .site-menu-backdrop,
  .site-mobile-panel { transition: none; }
}