@keyframes progress-bar-stripes { from { background-position: $progress-height 0; } to { background-position: 0 0; } } .progress { display: flex; height: $progress-height; overflow: hidden; // force rounded corners by cropping it font-size: $progress-font-size; background-color: $progress-bg; @include border-radius($progress-border-radius); @include box-shadow($progress-box-shadow); } .progress-bar { display: flex; flex-direction: column; justify-content: center; color: $progress-bar-color; text-align: center; white-space: nowrap; background-color: $progress-bar-bg; @include transition($progress-bar-transition); } .progress-bar-striped { @include gradient-striped(); background-size: $progress-height $progress-height; } .progress-bar-animated { animation: progress-bar-stripes $progress-bar-animation-timing; }