.mobile-nav {
    position: fixed;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 2rem);
    max-width: 500px;
    background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
    border-radius: 2rem;
    padding: 0.6rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.4rem;
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.3), 0 0 0 1px rgba(212, 175, 55, 0.2);
    backdrop-filter: blur(10px);
    z-index: 1000;
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(100px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.mobile-nav .nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    padding: 0.8rem 0.4rem;
    border-radius: 1.2rem;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
}

.mobile-nav .nav-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.3) 0%, transparent 70%);
    transition: all 0.5s ease;
    transform: translate(-50%, -50%);
}

.mobile-nav .nav-link:active::before {
    width: 150%;
    height: 150%;
}

.mobile-nav .nav-link i {
    font-size: 1.4rem;
    margin-bottom: 0.35rem;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    filter: drop-shadow(0 0 0 transparent);
}

.mobile-nav .nav-link span {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    opacity: 0.8;
}

.mobile-nav .nav-link:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    color: #fff;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.mobile-nav .nav-link:hover i {
    transform: translateY(-3px) scale(1.15);
    filter: drop-shadow(0 4px 8px rgba(212, 175, 55, 0.5));
}

.mobile-nav .nav-link:hover span {
    opacity: 1;
    transform: scale(1.05);
}

.mobile-nav .nav-link.active {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.25), rgba(212, 175, 55, 0.15));
    color: #d4af37;
    border: 1.5px solid rgba(212, 175, 55, 0.5);
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.4), inset 0 0 10px rgba(212, 175, 55, 0.1);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(212, 175, 55, 0.4), inset 0 0 10px rgba(212, 175, 55, 0.1);
    }
    50% {
        box-shadow: 0 0 30px rgba(212, 175, 55, 0.6), inset 0 0 15px rgba(212, 175, 55, 0.2);
    }
}

.mobile-nav .nav-link.active i {
    color: #d4af37;
    transform: scale(1.2);
    filter: drop-shadow(0 0 10px rgba(212, 175, 55, 0.8));
    animation: bounce 1s ease infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: scale(1.2) translateY(0);
    }
    50% {
        transform: scale(1.2) translateY(-3px);
    }
}

.mobile-nav .nav-link.active span {
    font-weight: 800;
    opacity: 1;
}

@media (min-width: 769px) {
    .mobile-nav {
        display: none;
    }
}