.site-header{position:sticky;top:0;z-index:50;padding-inline:1rem;width:100vw;background-color:var(--card-background);backdrop-filter:blur(12px) saturate(180%);-webkit-backdrop-filter:blur(12px) saturate(180%);border-bottom:1px solid rgba(255,255,255,.3);padding:var(--space-1) 0}:root[data-theme=dark] .site-header{border-bottom:1px solid rgba(255,255,255,.1)}.header-inner{display:grid;grid-template-columns:auto 1fr auto;align-items:center;min-height:64px;position:relative;gap:1rem;background:transparent}.brand{display:inline-flex;align-items:center;gap:.6rem;margin-left:1em}.brand-logo{display:block;height:24px;width:auto}.nav-settings{display:inline-flex;flex-direction:row;justify-content:space-between;align-items:center;margin:var(--space-3) var(--space-3)}.lang-switch{display:inline-flex;align-items:center;gap:.25rem;font-size:.9rem}.lang-switch a{color:var(--text);text-decoration:none;font-weight:500}.lang-switch a:hover{text-decoration:underline}.lang-switch .active{font-weight:700;color:var(--color-primary)}.theme-switch{display:inline-flex;align-items:center;margin-left:1rem}.theme-switch button{background:none;border:none;cursor:pointer;padding:0}.theme-switch img{width:20px;height:20px;filter:var(--theme-icon-filter, none)}:root[data-theme=dark] .theme-switch img{filter:brightness(0) saturate(100%) invert(62%) sepia(12%) saturate(5567%) hue-rotate(199deg) brightness(103%) contrast(101%)}