* {
    padding: 0;
    margin: 0;
}

body {
    width: 90%;
    height: 760px;
    margin: auto;
}
.app ul li{
    list-style: none;
    height: 50px;
    line-height: 50px;
    border-bottom: 1px dotted red;
}
.box1{
    height: 50px;
    line-height: 50px;
    text-align: center;
    border-bottom: 3px solid #bababa;
    font-weight: bold;
}
header a {
    text-decoration: none;
    color: rgb(46, 43, 39);
}

header li {
    list-style: none;
    width: 20%;
    text-align: center;
    float: left;
    font-weight: bold;
}

header ul {
    height: 50px;
    line-height: 50px;
    background-color: #e4e3f0;
}

header li:hover {
    background-color: #bababa;
}

#logo,
#main,
footer {
    width: 700px;
    margin-left: 30%;
}

#main {
    height: 380px;
}

#main li {
    height: 35px;
    list-style-type: none;
}

#user,
#psw1,
#psw2 {
    height: 20px;
    width: 150px;
    border: 1px solid #157782;
    background-color: #FFD4E2;
}

#user:hover,
#psw1:hover,
#psw2:hover {
    background-color: #FFFFFF;
}