.site-header{position:sticky;top:0;z-index:40;background-color:rgba(15,23,42,0.96);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);color:#f9fafb;border-bottom:1px solid rgba(148,163,184,0.25)}.site-header-inner{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}.site-branding{display:flex;align-items:center;min-width:0}.site-logo{display:flex;align-items:center;gap:var(--space-3)}.site-logo-mark{width:2.1rem;height:2.1rem;border-radius:0.75rem;background:conic-gradient(from 140deg at 30% 10%,var(--color-primary),var(--color-accent),var(--color-primary));box-shadow:0 0 0 2px rgba(15,23,42,0.9),0 0 28px rgba(56,189,248,0.6)}.site-logo-text{display:flex;flex-direction:column;line-height:1.1}.site-logo-title{font-family:var(--font-heading);font-size:0.95rem;font-weight:700;letter-spacing:0.16em;text-transform:uppercase;white-space:nowrap}.site-logo-subtitle{font-size:0.75rem;color:rgba(209,213,219,0.9);letter-spacing:0.08em;text-transform:uppercase}.nav-main{display:flex;align-items:center;gap:var(--space-4);font-size:var(--font-size-sm)}.nav-list{display:flex;align-items:center;gap:var(--space-4);list-style:none;margin:0;padding:0}.nav-item{position:relative}.nav-link{position:relative;padding-block:0.2rem;color:rgba(226,232,240,0.9);text-transform:uppercase;letter-spacing:0.09em;font-weight:500;transition:color var(--transition-base)}.nav-link::after{content:"";position:absolute;left:0;bottom:-0.3rem;height:2px;width:0;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));border-radius:999px;transition:width var(--transition-base)}.nav-link:hover{color:#ffffff}.nav-link:hover::after,.nav-link[aria-current="page"]::after{width:100%}.btn-nav{font-size:0.75rem;padding-inline:1.25rem;padding-block:0.45rem;border-radius:var(--radius-full);background:linear-gradient(120deg,var(--color-primary),var(--color-accent));border:0}.btn-nav:hover{background:linear-gradient(120deg,var(--color-primary-strong),var(--color-accent));transform:translateY(-1px);box-shadow:var(--shadow-md)}.nav-cta-wrapper{margin-left:var(--space-3)}.nav-toggle{display:inline-flex;width:2.4rem;height:2.4rem;align-items:center;justify-content:center;border-radius:999px;border:1px solid rgba(148,163,184,0.7);background:rgba(15,23,42,0.8);color:#e5e7eb;transition:background-color var(--transition-base),border-color var(--transition-base),transform var(--transition-fast)}.nav-toggle-box{display:inline-flex;flex-direction:column;gap:0.22rem}.nav-toggle-bar{width:1.1rem;height:2px;border-radius:999px;background:#e5e7eb;transition:transform var(--transition-base),opacity var(--transition-base),width var(--transition-base)}.nav-toggle:hover{background:rgba(15,23,42,1);border-color:rgba(129,140,248,0.9);transform:translateY(-1px)}.nav-toggle.is-active .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg);width:1.2rem}.nav-toggle.is-active .nav-toggle-bar:nth-child(2){opacity:0}.nav-toggle.is-active .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg);width:1.2rem}.nav-main{position:relative}.nav-main.is-open{display:flex}.nav-main.is-open .nav-list{flex-direction:column;align-items:flex-start}.nav-main.is-open .nav-cta-wrapper{width:100%;margin-left:0;margin-top:var(--space-3);display:flex;justify-content:flex-start}.nav-search-sticky{position:sticky;top:var(--header-height);z-index:30;background:rgba(2,6,23,0.98);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(148,163,184,0.6);padding-block:0.4rem}.nav-search-inner{display:flex;align-items:center}.nav-search-form{display:flex;align-items:center;gap:var(--space-3);width:100%}.nav-search-input{position:relative;flex:1}.nav-search-input .input{padding-left:2.25rem;background-color:rgba(15,23,42,0.7);border-color:rgba(148,163,184,0.85);color:#e5e7eb}.nav-search-input .input::placeholder{color:rgba(148,163,184,0.9)}.nav-search-input-icon{position:absolute;left:0.75rem;top:50%;transform:translateY(-50%);font-size:0.85rem;color:rgba(148,163,184,0.9)}.btn-search{padding-inline:1.4rem;padding-block:0.55rem;font-size:0.75rem;border-radius:var(--radius-full);background-color:var(--color-primary);border:1px solid transparent}.btn-search:hover{background-color:var(--color-primary-strong)}@media(max-width:767px){.site-header-inner{gap:var(--space-2)}.site-logo-subtitle{display:none}.nav-main{position:absolute;inset-inline:0;top:100%;background:rgba(2,6,23,0.98);border-bottom:1px solid rgba(15,23,42,0.9);padding:0 var(--space-4) var(--space-4);display:none;flex-direction:column}.nav-list{flex-direction:column;align-items:flex-start;padding-top:var(--space-3)}.nav-cta-wrapper{width:100%;margin-left:0;margin-top:var(--space-3);display:flex;justify-content:flex-start}.nav-main.is-open{display:flex;animation:navSlideDown 180ms ease-out}.nav-toggle{margin-left:auto}.nav-search-form{gap:var(--space-2)}.btn-search{padding-inline:1rem}}@media(min-width:768px){.nav-toggle{display:none}.nav-main{display:flex;align-items:center}.nav-main.is-open{display:flex}.nav-list{flex-direction:row}.nav-cta-wrapper{margin-left:var(--space-4)}.nav-search-sticky{top:var(--header-height)}}@keyframes navSlideDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}