.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
}

.site-header-container {
  max-width: 1440px;
}

.site-header-inner {
  position: relative;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: 0.6rem;
}

.site-header-logo {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.site-header-logo-mark {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(37, 99, 235, 0.8);
  border-radius: 999px;
  background: radial-gradient(circle at 30% 0, rgba(255, 255, 255, 0.95), rgba(37, 99, 235, 0.5));
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.site-header-logo-mark::before {
  content: "♣";
  font-size: 1.1rem;
  color: #1e40af;
}

.site-header-logo-text {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 1px;
}

.site-header-logo-title,
.site-header-logo-subtitle,
.site-header-nav-link {
  white-space: nowrap;
}

.site-header-logo-title {
  font-family: var(--font-serif);
  font-size: 0.92rem;
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-main);
}

.site-header-logo-subtitle {
  font-size: 0.65rem;
  line-height: 1.35;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-header-nav {
  display: none;
  align-items: center;
}

.site-header-nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header-nav-link {
  font-size: 0.8rem;
  letter-spacing: 0.045em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-header-nav-item--mobile,
.site-header-cta {
  display: none;
}

.site-header-toggle {
  display: inline-flex;
  flex: 0 0 40px;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-left: auto;
  gap: 4px;
  border: 1px solid rgba(226, 232, 240, 0.95);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-sm);
}

.site-header-toggle-bar {
  width: 18px;
  height: 1.6px;
  border-radius: 999px;
  background: var(--color-text-main);
  transition: transform var(--transition-base), translate var(--transition-base);
}

.site-header-toggle[aria-expanded="true"] .site-header-toggle-bar:first-child {
  transform: rotate(42deg);
  translate: 0 3px;
}

.site-header-toggle[aria-expanded="true"] .site-header-toggle-bar:last-child {
  transform: rotate(-42deg);
  translate: 0 -3px;
}

@media (max-width: 1199.98px) {
  .site-header-nav {
    position: absolute;
    inset-inline: 0;
    top: calc(100% + 0.5rem);
    display: none;
    overflow: hidden;
    flex-direction: column;
    align-items: stretch;
    padding: 0.4rem 0;
    border: 1px solid rgba(226, 232, 240, 0.95);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-soft-elevated);
    backdrop-filter: blur(20px);
  }

  .site-header-nav-list {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-header-nav-item,
  .site-header-nav-link {
    width: 100%;
  }

  .site-header-nav-link {
    display: block;
    padding: 0.7rem 1.25rem;
    font-size: 0.88rem;
  }

  .site-header-nav-link:hover {
    background: var(--gray-50);
  }

  .site-header-nav-link::after {
    display: none;
  }

  .site-header-nav-link:focus-visible {
    outline: none;
    box-shadow: inset 0 0 0 2px var(--focus-ring-color);
  }

  .site-header-nav-item--mobile {
    display: block;
  }

  .site-header-nav--open {
    display: flex;
    animation: headerNavFadeIn var(--transition-slow);
  }
}

@media (min-width: 768px) and (max-width: 1199.98px) {
  .site-header-cta {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    margin-left: auto;
  }

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

  .site-header-toggle {
    margin-left: 0;
  }
}

@media (min-width: 1200px) {
  .site-header-inner {
    gap: clamp(1rem, 1.5vw, 1.5rem);
  }

  .site-header-nav {
    display: flex;
    margin-left: auto;
  }

  .site-header-nav-list {
    gap: clamp(0.75rem, 1.15vw, 1.25rem);
  }

  .site-header-toggle,
  .site-header-nav-item--mobile {
    display: none;
  }

  .site-header-cta {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: var(--space-2);
    margin-left: 0;
  }

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

@media (min-width: 1400px) {
  .site-header-cta-secondary {
    display: inline-flex;
  }
}

@media (max-width: 479.98px) {
  .site-header-logo-title {
    font-size: 0.82rem;
    letter-spacing: 0.09em;
  }

  .site-header-logo-subtitle {
    font-size: 0.58rem;
    letter-spacing: 0.11em;
  }
}

@keyframes headerNavFadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-header-nav-link:focus-visible,
.site-header-toggle:focus-visible,
.site-header-logo:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}