body{
    margin:0;
    font-family: Arial, Helvetica, sans-serif;
    background:#f5f5f5;
}

#container {

}

#header {
    height:200px;
    background: linear-gradient(to right,#9b0000,#d62828);
    border-bottom:4px solid #f4c430;
}

#menu {
    height:50px;
    background:#f4c430;
    border-bottom:2px solid #d4a017;
}

#content {
  width:80%;
    margin:auto;
    padding-top:20px;
}

.sp{
    width:300px;
    height:250px;
    float:left;
    margin:20px;
    border-radius:15px;
    padding:20px;

    background-image:url(/bai-tap-tet/img/ao-dai.jpg);
    background-size:cover;
    background-position:center;

    color:white;
    position:relative;
    overflow:hidden;

    box-shadow:0 6px 15px rgba(0,0,0,0.25);
}

.sp::before{
    content:"";
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.45);
}

.sp h1{
    position:relative;
    color:#ffd166;
    font-size:22px;
    margin-bottom:10px;
}

.sp p{
    position:relative;
    color:#f1f1f1;
    font-size:14px;
    line-height:1.4;
}