.site-header{
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 68px;
  position: relative;
  padding: 0 var(--space-3);
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  letter-spacing: 0;
  font-size: 1.05em;
  color: var(--text);
  text-decoration: none;
}

.brand-mark{
  display: block;
  width: 28px;
  height: 28px;
}

.brand-name{
  display: inline-block;
  line-height: 1;
  font-size: 40px;
}

.menu-toggle{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--text) 18%, var(--border));
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  font: inherit;
  font-weight: 600;
  line-height: 1;
  position: relative;
  z-index: 31;
  box-shadow: 0 1px 0 color-mix(in srgb, var(--text) 8%, transparent);
}

.menu-toggle:hover{
  background: color-mix(in srgb, var(--text) 4%, var(--bg));
  border-color: color-mix(in srgb, var(--text) 22%, var(--border));
  box-shadow: 0 2px 0 color-mix(in srgb, var(--text) 10%, transparent);
}

.menu-toggle:active{
  background: color-mix(in srgb, var(--text) 7%, var(--bg));
  box-shadow: 0 0 0 color-mix(in srgb, var(--text) 0%, transparent);
  transform: translateY(1px);
}

.menu-toggle:focus-visible{
  outline: 2px solid color-mix(in srgb, var(--primary) 60%, var(--text));
  outline-offset: 2px;
}

.menu-panel{
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  width: min(520px, calc(100vw - (var(--space-3) * 2)));
  padding: var(--space-3);
  border-radius: 16px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 92%, var(--bg));
  box-shadow: 0 18px 50px color-mix(in srgb, #000 22%, transparent);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: 30;
  max-height: min(72vh, 560px);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  pointer-events: none;
}

.menu-panel[hidden]{
  display: none;
}

.nav{
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: flex-start;
}

.nav a{
  display: inline-flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
}

.nav a[aria-current="page"]{
  color: var(--text);
  border-color: var(--border);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  text-decoration: none;
}

.header-cta{
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.header-btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--text) 18%, var(--border));
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.header-btn:hover{
  background: color-mix(in srgb, var(--text) 4%, var(--bg));
}

.header-btn:active{
  background: color-mix(in srgb, var(--text) 7%, var(--bg));
}

.header-btn:focus-visible{
  outline: 2px solid color-mix(in srgb, var(--primary) 60%, var(--text));
  outline-offset: 2px;
}

.header-btn.primary{
  border-color: var(--text);
  background: var(--text);
  color: var(--bg);
}

.header-btn.primary:hover{
  background: color-mix(in srgb, var(--text) 92%, var(--bg));
}

.header-btn.primary:active{
  background: color-mix(in srgb, var(--text) 86%, var(--bg));
}

.menu-toggle[aria-expanded="true"]{
  border-color: color-mix(in srgb, var(--text) 26%, var(--border));
  background: color-mix(in srgb, var(--text) 5%, var(--bg));
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--text) 10%, transparent);
}

.menu-toggle[aria-expanded="true"]:hover{
  background: color-mix(in srgb, var(--text) 7%, var(--bg));
}

.menu-toggle[aria-expanded="true"]:active{
  background: color-mix(in srgb, var(--text) 10%, var(--bg));
  transform: translateY(1px);
}

.menu-panel{
  transform: translateY(-4px);
  opacity: 0;
}

.menu-panel:not([hidden]){
  transform: translateY(0);
  opacity: 1;
  border-color: color-mix(in srgb, var(--text) 16%, var(--border));
  box-shadow: 0 12px 34px color-mix(in srgb, #000 16%, transparent);
  pointer-events: auto;
}

@media (prefers-reduced-motion: no-preference){
  .menu-panel{
    transition: opacity 140ms ease, transform 160ms ease;
  }

  .menu-toggle{
    transition: background 120ms ease, border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
  }
}

button.menu-close{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--text) 18%, var(--border));
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  font: inherit;
  line-height: 1;
}

button.menu-close:hover{
  background: color-mix(in srgb, var(--text) 4%, var(--bg));
}

button.menu-close:active{
  background: color-mix(in srgb, var(--text) 7%, var(--bg));
}

button.menu-close:focus-visible{
  outline: 2px solid color-mix(in srgb, var(--primary) 60%, var(--text));
  outline-offset: 2px;
}

button.menu-close svg{
  width: 18px;
  height: 18px;
  display: block;
}

button.menu-close[aria-label]{
  width: 38px;
  padding: 0;
}