global.css

.dropdown-menu {
    max-height:50vh;
    max-width:85vw;
    overflow:auto;
}
.jumbotron {
    border-radius: 0;
    background-color: transparent;
    background-image: radial-gradient(
        rgba(0, 123, 255,0.4),
        rgba(0, 123, 255,0.05),
        transparent
    );
}
a.page-link { 
    min-width: 3em; 
    text-align: center; 
}
.exercise {
    overflow-x: auto;
}