<div class="content-wrapper">
			<div class="content-list">1</div>
			<div class="content-list">1</div>
			<div class="content-list">1</div>
		</div>

			*{
				margin: 0;
				padding: 0;
			}
			.content-wrapper{
				display: flex;
				width: 100%;
				height: 40px;
				line-height: 40px;
				background-color: rgba(0,0,0,0.5);
			}
			.content-wrapper .content-list{
				flex: 1;
				text-align: center;
				color: #FFFFFF;
			}