.nav-container {
    position: absolute;
    top: 25px;
    right: 40px;
    z-index: 2000; /* Ensure it's above everything */
    display: flex;
    gap: 15px;
}

.nav-btn {
    width: 60px;
    height: 60px;
    background: rgba(30, 41, 59, 0.8); /* Darker background for contrast */
    backdrop-filter: blur(10px);
    border: 3px solid rgba(59, 130, 246, 0.6); /* Thicker blue border */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem; /* Larger font */
    font-weight: 900; /* Bolder */
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.nav-btn:hover {
    background: #3b82f6; /* Bright blue on hover */
    border-color: white;
    transform: scale(1.1); /* Slightly larger */
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.8);
    color: white;
}

.nav-btn.disabled {
    opacity: 0.1;
    cursor: not-allowed;
    pointer-events: none;
    border-color: rgba(255, 255, 255, 0.1);
}