.header{width:100%;background:linear-gradient(90deg,#141e30,#243b55);padding:15px 50px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.15);box-shadow:0 4px 20px #0006;position:sticky;top:0;z-index:100}.logo a{font-size:1.6rem;font-weight:700;text-decoration:none;color:#4facfe;letter-spacing:1px;transition:.3s}.logo a:hover{color:#00f2fe;text-shadow:0 0 10px #00f2fe}.nav-links{display:flex;gap:25px}.nav-links a{text-decoration:none;color:#ccc;font-weight:600;font-size:1rem;transition:.3s;padding-bottom:4px;border-bottom:2px solid transparent}.nav-links a:hover{color:#4facfe;border-bottom:2px solid #4facfe}.nav-links .active{color:#00f2fe;border-bottom:2px solid #00f2fe}@media (max-width: 768px){.header{flex-direction:column;align-items:flex-start;padding:15px 20px}.nav-links{flex-direction:column;gap:10px;width:100%;margin-top:10px}}