.wrapper{width:500px}.progress-bar{width:100%;padding:2px;border-radius:10px;box-shadow:inset 0 1px 3px rgba(0,0,0,.2)}.progress-bar-fill{display:block;background:linear-gradient(#451e0e,#865300,#451e0e);border-radius:8px;transition:width .5s ease-in-out}