.modern-header{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:100;background:#fffffff2;border-bottom:1px solid #0000000f;transition:all .3s;position:sticky;top:0;box-shadow:0 2px 20px #0000000a}.modern-header:hover{box-shadow:0 4px 30px #00000014}.logo{cursor:pointer;color:#1e293b;-webkit-user-select:none;user-select:none;letter-spacing:-.02em;font-size:24px;font-weight:900;transition:all .3s}.logo:hover{transform:translateY(-1px)}.logo-gradient{background:linear-gradient(135deg,#6366f1 0%,#8b5cf6 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.nav-items{position:absolute;left:50%;transform:translate(-50%)}.nav-button{color:#64748b;padding:8px 20px;font-size:15px;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative}.nav-button:before{content:"";background:linear-gradient(135deg,#6366f1 0%,#8b5cf6 100%);border-radius:2px;width:80%;height:2px;transition:transform .3s;position:absolute;bottom:0;left:50%;transform:translate(-50%)scaleX(0)}.nav-button:hover{color:#6366f1;background:#6366f114}.nav-button:hover:before{transform:translate(-50%)scaleX(1)}.nav-button.active{color:#6366f1;background:#6366f11f}.nav-button.active:before{transform:translate(-50%)scaleX(1)}.language-selector{background:#f1f5f9cc;border-radius:12px;padding:4px}.lang-button{color:#64748b;background:0 0;border:1px solid #0000;padding:6px 12px;font-size:13px;font-weight:600;transition:all .3s}.lang-button:hover{color:#6366f1;background:#ffffffe6;border-color:#6366f133}.lang-button.active{color:#fff;background:linear-gradient(135deg,#6366f1 0%,#8b5cf6 100%);box-shadow:0 4px 12px #6366f14d}.flag{margin-right:6px;font-size:16px;display:inline-block}@media (max-width:1024px){.nav-items{position:static;transform:none}}@media (max-width:768px){.logo{font-size:20px}.nav-button{padding:6px 14px;font-size:14px}.language-selector{padding:3px}.lang-button{padding:5px 10px;font-size:12px}.flag{font-size:14px}}@media (max-width:640px){.nav-items{gap:4px}.nav-button{padding:6px 12px}}