/* Nisulka Tools — stable floating glass navigation */
:root{--site-header-height:76px}#site-header-mount{height:var(--site-header-height);transition:height .2s ease}.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;width:100%;padding:8px 0 0;background:transparent;border:0;pointer-events:none}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px;padding:0 12px;border:1px solid color-mix(in srgb,var(--border-color) 70%,transparent);border-radius:18px;background:color-mix(in srgb,var(--bg-surface) 82%,transparent);box-shadow:0 8px 30px rgba(0,0,0,.08);backdrop-filter:blur(22px) saturate(150%);-webkit-backdrop-filter:blur(22px) saturate(150%);pointer-events:auto;transition:min-height .2s ease,box-shadow .2s ease}
.site-header.is-scrolled .header-inner{min-height:54px;background:color-mix(in srgb,var(--bg-surface) 92%,transparent);border-color:color-mix(in srgb,var(--border-color) 88%,transparent);box-shadow:0 10px 35px rgba(0,0,0,.12)}
.site-logo{display:inline-flex;align-items:center;gap:.65rem;color:var(--text-primary);font-weight:700;flex-shrink:0}.site-logo-mark{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:11px;background:var(--brand-primary);color:var(--text-on-primary);font-size:1.05rem;font-weight:700}.site-logo-text{font-size:1rem;letter-spacing:-.02em}
.site-nav{display:none;align-items:center;gap:.2rem}.nav-link{display:inline-flex;align-items:center;min-height:38px;padding:.45rem .75rem;border-radius:12px;color:var(--text-secondary);font-size:var(--font-size-sm);font-weight:500;white-space:nowrap}.nav-link:hover{background:var(--bg-surface-secondary);color:var(--text-primary)}.nav-link.active{background:color-mix(in srgb,var(--brand-primary) 12%,transparent);color:var(--brand-primary);font-weight:600}
.header-actions{display:flex;align-items:center;justify-content:flex-end;gap:.45rem;min-width:0}.header-search{display:flex;align-items:center;width:150px;height:38px;padding:0 .55rem;border:1px solid var(--border-color);border-radius:13px;background:color-mix(in srgb,var(--bg-surface) 65%,transparent);color:var(--text-muted);overflow:hidden;transition:width .2s ease,border-color .15s ease,box-shadow .15s ease}.header-search:focus-within,.header-search.is-expanded{width:205px;border-color:var(--brand-primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand-primary) 12%,transparent)}.header-search-icon{display:flex;flex:0 0 auto;width:16px;height:16px}.header-search-icon svg{width:100%;height:100%}.header-search-trigger{display:flex;align-items:center;justify-content:center;flex:0 0 auto;width:24px;height:32px;padding:0;border:0;background:transparent;color:inherit;cursor:pointer}.header-search input{width:100%;min-width:0;padding:0 .45rem;border:0;outline:0;background:transparent;color:var(--text-primary);font:inherit;font-size:var(--font-size-sm)}
.header-icon-button,.mobile-menu-button{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;padding:0;border:1px solid var(--border-color);border-radius:12px;background:color-mix(in srgb,var(--bg-surface) 65%,transparent);color:var(--text-secondary);cursor:pointer}.mobile-menu-button{flex-direction:column;gap:4px}.mobile-menu-button span{display:block;width:18px;height:2px;border-radius:99px;background:var(--text-primary);transition:transform .15s ease,opacity .15s ease}.mobile-menu-button[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}.mobile-menu-button[aria-expanded="true"] span:nth-child(2){opacity:0}.mobile-menu-button[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media (max-width:767px){:root{--site-header-height:calc(68px + env(safe-area-inset-top))}#site-header-mount{height:var(--site-header-height)}.site-header{padding-top:max(8px,env(safe-area-inset-top))}.site-nav{position:absolute;top:calc(100% + 8px);left:0;right:0;display:flex;flex-direction:column;align-items:stretch;gap:2px;padding:8px;border:1px solid var(--border-color);border-radius:18px;background:color-mix(in srgb,var(--bg-surface) 94%,transparent);box-shadow:0 16px 40px rgba(0,0,0,.14);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);opacity:0;visibility:hidden;transform:translateY(-6px);pointer-events:none;transition:opacity .15s ease,visibility .15s ease,transform .15s ease}.site-nav.is-open{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}.nav-link{width:100%;min-height:44px}.header-search{width:38px;height:38px;padding:0;justify-content:center}.header-search.is-expanded{width:180px;padding:0 .55rem}.header-search input{display:none}.header-search.is-expanded input{display:block}body.menu-open{overflow:hidden}}
@media (min-width:768px){.site-nav{display:flex}.mobile-menu-button{display:none}}@media (min-width:1024px){:root{--site-header-height:80px}.header-inner{min-height:64px}.site-nav{gap:.3rem}.site-logo-text{font-size:1.05rem}}@media (max-width:900px) and (min-width:768px){.site-nav .nav-link{padding-inline:.5rem}.header-search{width:120px}.header-search:focus-within{width:160px}}@media (max-width:420px){.site-logo-text{display:none}.header-actions{gap:.25rem}.header-search.is-expanded{width:145px}}@media (prefers-reduced-motion:reduce){.header-inner,.site-nav,.header-search,.mobile-menu-button span{transition:none!important}}