.site-header {
  box-sizing: border-box;
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: 84px;
  padding: 0 clamp(20px, 4vw, 60px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  background: rgba(10, 8, 14, .96);
  border-bottom: 1px solid #2e2538;
  backdrop-filter: blur(12px);
}
.site-header .brand { flex: 0 0 auto; }
.site-header .brand { order: 1; }
.site-header .brand-logo { display: block; width: 150px; height: 58px; object-fit: contain; }
.site-header nav { order: 2; display: flex; align-items: center; justify-content: center; gap: 24px; margin: 0 auto; }
.site-header nav a { padding: 8px 0; color: #f7f3ff; font-family: "DM Sans", sans-serif; font-weight: 600; line-height: 1; text-decoration: none; white-space: nowrap; }
.site-header nav a { position: relative; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: #d6a7ff; text-shadow: 0 0 8px #b56cff, 0 0 18px #8d3bd1; }
.site-header nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -13px; height: 3px; border-radius: 3px; background: #c576ff; box-shadow: 0 0 7px #c576ff, 0 0 18px #9a3ee2; }
.site-header .header-actions { order: 3; display: flex; flex: 0 0 auto; align-items: center; gap: 7px; }
.site-header .image-button { display: block; line-height: 0; transition: transform .2s ease, filter .2s ease; }
.site-header .image-button:hover { transform: translateY(-2px); filter: brightness(1.15); }
.site-header .image-button[aria-current="page"] { filter: brightness(1.2) drop-shadow(0 0 7px #bd6aff) drop-shadow(0 0 14px #8537c6); }
.site-header .image-button img { display: block; width: 112px; height: auto; }
.site-header .header-partner-badge { order: 4; display: block; flex: 0 0 auto; width: 92px; height: 54px; object-fit: contain; }
.menu-toggle { order: 5; display: none; width: 44px; height: 44px; padding: 10px; flex: 0 0 auto; border: 1px solid #614379; background: #171020; cursor: pointer; }
.menu-toggle span { display: block; width: 100%; height: 2px; margin: 5px 0; background: #c883ff; box-shadow: 0 0 7px #a949ed; transition: transform .25s ease, opacity .2s ease; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
@media (max-width: 1150px) {
  .menu-toggle { display: block; margin-left: 0; }
  .site-header nav { position: absolute; top: 100%; left: 0; right: 0; display: flex; max-height: 0; padding: 0 clamp(20px, 5vw, 60px); overflow: hidden; align-items: stretch; flex-direction: column; gap: 0; background: rgba(10,8,14,.985); border-bottom: 0 solid #5e3d74; opacity: 0; visibility: hidden; transition: max-height .3s ease, padding .3s ease, opacity .2s ease, border-width .2s ease; }
  .site-header.menu-open nav { max-height: 430px; padding-top: 13px; padding-bottom: 17px; border-bottom-width: 1px; opacity: 1; visibility: visible; }
  .site-header nav a { width: 100%; padding: 15px 3px; border-bottom: 1px solid #2f213b; }
  .site-header nav a[aria-current="page"]::after { left: auto; right: 3px; bottom: 50%; width: 8px; height: 8px; transform: translateY(50%); border-radius: 50%; }
}
@media (max-width: 620px) {
  .site-header { height: 72px; padding: 0 14px; gap: 8px; }
  .site-header .brand-logo { width: 120px; height: 48px; }
  .site-header .header-actions { gap: 2px; margin-left: 0; }
  .site-header .image-button img { width: 82px; }
  .site-header .header-partner-badge { display: none; }
}
@media (max-width: 390px) {
  .site-header .brand-logo { width: 94px; }
  .site-header .image-button img { width: 64px; }
  .menu-toggle { width: 40px; height: 40px; padding: 8px; }
}