.site-header{position:relative;z-index:100;top:0;border-bottom:1px solid transparent;background:rgba(2,11,24,.58);backdrop-filter:blur(14px);transition:background .25s,border-color .25s}.ikcyber-header-sticky .site-header{position:sticky}.site-header.is-scrolled{background:rgba(2,11,24,.9);border-color:var(--border)}[data-theme="light"] .site-header{background:rgba(244,249,252,.76)}[data-theme="light"] .site-header.is-scrolled{background:rgba(244,249,252,.94)}.site-header__inner{min-height:66px;display:flex;align-items:center;gap:1.4rem}.site-branding{flex:0 0 auto}.brand-link{display:flex;align-items:center;gap:.55rem;font-weight:800;white-space:nowrap}.brand-mark{color:var(--accent);font-size:1.35rem;font-weight:900;letter-spacing:-.18em;transform:skew(-10deg);padding-right:.15rem}.brand-name{font-size:.9rem}.custom-logo-link{display:flex}.custom-logo{max-height:42px;width:auto}.main-navigation{margin-left:auto}.main-navigation .menu{display:flex;gap:1.05rem;list-style:none;padding:0;margin:0}.main-navigation a{position:relative;display:block;padding:.3rem 0;font-size:.74rem;font-weight:700}.main-navigation .current-menu-item>a:after,.main-navigation a:hover:after{content:"";position:absolute;bottom:-.5rem;left:0;width:100%;height:2px;background:var(--accent);box-shadow:var(--glow)}.header-actions{display:flex;align-items:center;gap:.7rem}.theme-toggle{display:flex;gap:.3rem;align-items:center;padding:.25rem .45rem;background:transparent;color:var(--text);border:1px solid var(--border);border-radius:999px;cursor:pointer;font-size:.8rem}.theme-toggle span:first-child{color:var(--accent)}[data-theme="light"] .theme-toggle span:last-child{color:var(--accent)}[data-theme="light"] .theme-toggle span:first-child{color:var(--muted)}.menu-toggle{display:none;background:transparent;border:0;color:var(--text);padding:.4rem;cursor:pointer}.menu-toggle span:not(.screen-reader-text){display:block;width:22px;height:2px;background:currentColor;margin:4px}