header {
    animation: fadeInDown 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
    will-change: transform, opacity;
}

.navbar-brand i {
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: inline-block;
}

.nav-link {
    position: relative;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.navbar-toggler {
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.dropdown-menu {
    animation: slideDownFade 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    transform-origin: top center;
    will-change: transform, opacity;
}

.dropdown-item {
    transition: transform 0.2s ease, background-color 0.2s ease, padding-left 0.2s ease;
}

.dropdown-item:hover {
    padding-left: 1.25rem;
    transform: translateX(4px);
    background-color: rgba(255, 255, 255, 0.08);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDownFade {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes subtlePulse {
    0%, 100% {
        transform: scale(1) translateZ(0);
    }
    50% {
        transform: scale(1.1) translateZ(0);
    }
}

.navbar-brand:hover i {
    animation: subtlePulse 1.2s infinite ease-in-out;
}