:root{--header-gap:clamp(0.35rem, 0.8vw, 1.2rem);--header-font-size:clamp(0.7rem, 0.85vw, 0.95rem)}header{display:flex;justify-content:space-between;align-items:center;padding:clamp(.75rem,1.5vw,1rem) clamp(1rem,4vw,5%);border-bottom:1px solid var(--border-default);background:var(--bg-surface);position:sticky;top:0;z-index:1000;gap:1rem;flex-wrap:nowrap}.logo{font-weight:700;font-size:clamp(1rem, 1.4vw, 1.25rem);color:var(--text-primary);text-decoration:none;display:flex;align-items:center;gap:.5rem}.logo .logo-icon{color:var(--accent-primary);width:1em;height:1em}nav{display:block;flex:1 1 auto}nav ul{display:flex;list-style:none;gap:var(--header-gap);align-items:center;justify-content:flex-end;flex-wrap:nowrap}nav a{text-decoration:none;color:var(--text-secondary);font-size:var(--header-font-size);font-weight:500;transition:color .2s;white-space:nowrap}nav a.active,nav a:hover{color:var(--accent-primary)}nav a.active{position:relative}nav a.active::after{content:"";position:absolute;bottom:-8px;left:0;width:100%;height:2px;background:var(--accent-primary);border-radius:1px}.burger{display:none;flex-direction:column;justify-content:space-between;width:30px;height:21px;background:0 0;border:none;cursor:pointer;z-index:1100}.burger-line{width:100%;height:3px;background-color:var(--text-primary);border-radius:2px;transition:all .3s ease}@media (max-width:1050px){.burger{display:flex}nav{display:block!important;position:fixed;top:0;right:-100%;width:100%;height:100vh;background:var(--bg-surface);padding:80px 20px;transition:right .4s cubic-bezier(.4, 0, .2, 1);box-shadow:-5px 0 15px rgba(0,0,0,.1)}nav.open{right:0}nav ul{flex-direction:column;align-items:center;gap:2rem}nav a{font-size:1.2rem}.burger.active .burger-line:first-child{transform:translateY(9px) rotate(45deg)}.burger.active .burger-line:nth-child(2){opacity:0}.burger.active .burger-line:nth-child(3){transform:translateY(-9px) rotate(-45deg)}body.menu-open{overflow:hidden}}@media (min-width:1051px){nav{position:static;width:auto;height:auto;padding:0;box-shadow:none;right:auto}}