.mk-header {
  position: sticky;
  top: 0;
  z-index: var(--mk-z-header);
  width: 100%;
  backdrop-filter: blur(22px) saturate(130%);
  -webkit-backdrop-filter: blur(22px) saturate(130%);
  background: linear-gradient(to bottom, rgba(5, 5, 9, 0.97), rgba(5, 5, 9, 0.94), rgba(5, 5, 9, 0.9));
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.85);
}

.mk-header-inner {
  height: var(--mk-header-height);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.mk-header-inner::before,
.mk-header-inner::after {
  content: "";
  position: absolute;
  inset: 0;
  border-top: 1px solid transparent;
  border-bottom: 1px solid transparent;
  pointer-events: none;
}

.mk-header-inner::before {
  border-image: linear-gradient(90deg, rgba(255, 48, 85, 0.7), rgba(47, 123, 255, 0.7)) 1;
  opacity: 0.55;
}

.mk-header-inner::after {
  border-image: linear-gradient(90deg, rgba(255, 214, 92, 0.85), transparent, rgba(255, 214, 92, 0.85)) 1;
  opacity: 0.4;
}

.mk-header-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  max-width: var(--mk-max-width-2xl);
  padding-left: var(--mk-container-padding-x);
  padding-right: var(--mk-container-padding-x);
  gap: var(--mk-space-lg);
}

.mk-header-nav {
  display: flex;
  align-items: center;
}

.mk-header-nav-left {
  justify-content: flex-end;
}

.mk-header-nav-right {
  justify-content: flex-start;
}

.mk-header-nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--mk-space-md);
}

.mk-header-nav-item {
  display: flex;
}

.mk-header-nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--mk-font-size-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mk-color-text-muted);
  padding: 0.3em 0;
  transition: color var(--mk-transition-base) var(--mk-ease-soft), opacity var(--mk-transition-fast) var(--mk-ease-soft), transform var(--mk-transition-base) var(--mk-ease-soft);
}

.mk-header-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25em;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background-image: linear-gradient(90deg, var(--mk-color-accent-red), var(--mk-color-accent-blue), var(--mk-color-accent-yellow));
  box-shadow: 0 0 12px rgba(255, 214, 92, 0.7);
  transition: width var(--mk-transition-base) var(--mk-ease-soft);
}

.mk-header-nav-link:hover {
  color: var(--mk-color-text);
  transform: translateY(-1px);
}

.mk-header-nav-link:hover::after {
  width: 100%;
}

.mk-header-nav-link.is-active {
  color: var(--mk-color-text);
}

.mk-header-nav-link.is-active::after {
  width: 100%;
}

.mk-header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--mk-space-2xs);
}

.mk-header-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--mk-space-sm);
}

.mk-header-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: radial-gradient(circle at 0% 0%, rgba(255, 48, 85, 0.9), transparent 60%), radial-gradient(circle at 100% 100%, rgba(47, 123, 255, 0.9), transparent 60%), rgba(5, 5, 9, 0.96);
  box-shadow: 0 0 0 1px rgba(255, 214, 92, 0.4), 0 0 24px rgba(255, 48, 85, 0.7), 0 0 28px rgba(47, 123, 255, 0.7);
}

.mk-header-logo-mark {
  width: 18px;
  height: 18px;
  border-radius: 40%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: inset 0 0 0 1px rgba(5, 5, 9, 0.9);
}

.mk-header-brand-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.mk-header-site-title {
  font-family: var(--mk-font-display);
  font-size: 1.1rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mk-color-text);
}

.mk-header-site-subtitle {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mk-color-text-muted);
}

.mk-header-right {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--mk-space-md);
}

.mk-header-actions {
  display: flex;
  align-items: center;
}

.mk-header-cta.is-active {
  box-shadow: 0 0 0 1px rgba(255, 214, 92, 0.5), 0 22px 50px rgba(0, 0, 0, 0.95);
}

.mk-header-mobile-actions {
  display: none;
  align-items: center;
  justify-content: flex-end;
  gap: var(--mk-space-sm);
}

.mk-header-cta-mobile {
  white-space: nowrap;
}

.mk-nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--mk-radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: radial-gradient(circle at 0% 0%, rgba(255, 48, 85, 0.4), transparent 55%), radial-gradient(circle at 100% 100%, rgba(47, 123, 255, 0.4), transparent 55%), rgba(5, 5, 9, 0.96);
  gap: 5px;
  cursor: pointer;
  transition: border-color var(--mk-transition-base) var(--mk-ease-soft), box-shadow var(--mk-transition-base) var(--mk-ease-soft), background var(--mk-transition-base) var(--mk-ease-soft), transform var(--mk-transition-base) var(--mk-ease-soft);
}

.mk-nav-toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--mk-color-accent-red), var(--mk-color-accent-blue));
  transition: transform var(--mk-transition-base) var(--mk-ease-soft), opacity var(--mk-transition-fast) var(--mk-ease-soft), background var(--mk-transition-base) var(--mk-ease-soft);
}

.mk-nav-toggle:hover {
  border-color: rgba(255, 214, 92, 0.8);
  box-shadow: 0 0 0 1px rgba(255, 214, 92, 0.5), 0 0 20px rgba(255, 214, 92, 0.4);
  transform: translateY(-1px);
}

.mk-nav-toggle.is-open .mk-nav-toggle-bar:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
  background: linear-gradient(90deg, var(--mk-color-accent-red), var(--mk-color-accent-yellow));
}

.mk-nav-toggle.is-open .mk-nav-toggle-bar:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
  background: linear-gradient(90deg, var(--mk-color-accent-blue), var(--mk-color-accent-yellow));
}

.mk-nav-toggle.is-open .mk-nav-toggle-bar:nth-child(3) {
  opacity: 0;
}

.mk-nav-mobile {
  position: fixed;
  inset: var(--mk-header-height) 0 0 0;
  z-index: calc(var(--mk-z-header) - 1);
  background: radial-gradient(circle at top, rgba(255, 48, 85, 0.35), transparent 60%), radial-gradient(circle at bottom, rgba(47, 123, 255, 0.35), transparent 60%), rgba(5, 5, 9, 0.98);
  backdrop-filter: blur(26px) saturate(140%);
  -webkit-backdrop-filter: blur(26px) saturate(140%);
  transform: translateY(-6%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--mk-transition-slow) var(--mk-ease-soft), opacity var(--mk-transition-slow) var(--mk-ease-soft);
  overflow-y: auto;
}

.mk-nav-mobile.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mk-nav-mobile-inner {
  max-width: var(--mk-max-width-2xl);
  margin: 0 auto;
  padding: var(--mk-space-xl) var(--mk-container-padding-x) var(--mk-space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--mk-space-lg);
}

.mk-nav-mobile-list {
  display: flex;
  flex-direction: column;
  gap: var(--mk-space-sm);
}

.mk-nav-mobile-item {
  display: block;
}

.mk-nav-mobile-link {
  display: block;
  font-size: var(--mk-font-size-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mk-color-text-soft);
  padding: 0.5em 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.mk-nav-mobile-link.is-active {
  color: var(--mk-color-text);
}

.mk-nav-mobile-footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--mk-space-sm);
}

.mk-nav-mobile-meta-link {
  font-size: var(--mk-font-size-xs);
  color: var(--mk-color-text-muted);
}

@media (max-width: 1023.98px) {
  .mk-header-grid {
    grid-template-columns: auto 1fr auto;
    gap: var(--mk-space-md);
  }

  .mk-header-nav-left,
  .mk-header-right {
    display: none;
  }

  .mk-header-center {
    grid-column: 2 / 3;
  }

  .mk-header-mobile-actions {
    display: inline-flex;
  }
}

@media (min-width: 1024px) {
  .mk-nav-mobile {
    display: none !important;
  }

  .mk-header-mobile-actions {
    display: none;
  }
}

@media (max-width: 767.98px) {
  .mk-header-site-title {
    font-size: 0.95rem;
  }

  .mk-header-site-subtitle {
    display: none;
  }

  .mk-header-grid {
    gap: var(--mk-space-sm);
  }

  .mk-header-inner {
    height: var(--mk-header-height);
  }
}

@media (max-width: 1023.98px) {
  body.is-nav-open {
    overflow: hidden;
  }

  body.is-nav-open .mk-header {
    position: fixed;
    inset: 0;
    z-index: 999999;
    width: 100%;
    height: 100dvh;
    overflow-y: auto;
    background:
      radial-gradient(circle at top left, rgba(255, 48, 85, 0.22), transparent 42%),
      radial-gradient(circle at bottom right, rgba(47, 123, 255, 0.22), transparent 46%),
      rgba(5, 5, 9, 0.98);
  }

  body.is-nav-open .mk-header-inner {
    height: var(--mk-header-height);
    flex-shrink: 0;
  }

  .mk-nav-mobile {
    display: none;
    position: static;
    inset: auto;
    z-index: auto;
    width: 100%;
    min-height: calc(100dvh - var(--mk-header-height));
    transform: none;
    opacity: 1;
    pointer-events: auto;
    overflow: visible;
    background:
      radial-gradient(circle at top, rgba(255, 48, 85, 0.18), transparent 55%),
      radial-gradient(circle at bottom, rgba(47, 123, 255, 0.18), transparent 55%),
      rgba(5, 5, 9, 0.98);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .mk-nav-mobile.is-open {
    display: block;
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .mk-nav-mobile-inner {
    padding: 24px var(--mk-container-padding-x) 40px;
  }

  .mk-nav-mobile-list {
    gap: 10px;
  }

  .mk-nav-mobile-link {
    padding: 14px 16px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.045);
  }

  .mk-nav-mobile-link.is-active {
    color: var(--mk-color-text);
    border-color: rgba(255, 214, 92, 0.45);
    background: rgba(255, 214, 92, 0.1);
  }

  .mk-nav-mobile-footer {
    padding-top: 18px;
  }
}