Move tagline to the left below the title

I have the title on the upper left, primary menu on the upper right, secondary menu just below the primary menu and cannot move the tagline just below the title (lower left). I was trying with this code:

#secondary-menu ul {text-align: right; list-style-type: none;}
#secondary-menu ul li {display: inline-block; padding: 20px;}
.navbar-wrapper .navbar .site-description {
float: left;
margin-left: 10px !important;
text-align: left;
}

…to align the tagline as left as possible but the tagline is positioned next to the title. So, can somebody help me to move the tagline BELOW the title (I hope that then this code will work nice in term of left alignment). Thank you!