body {
    background: url('img/mostaqimi_bg.jpg');
    font-family: tahoma;
    padding: 0;
    margin: 0;
    direction: rtl;
}
.container {
    padding: 0 10%;
}
nav{
    background:#999;
    display: flex;
    justify-content: center;
}
nav a {
    color:#fff;
    display: block;
    padding: 10px;
    text-decoration: none;
}
nav a:hover {
    background:#666;
    text-decoration: underline;
}
.sub_menu {
    cursur: pointer;
    color: #fff;
    position: relative;
    padding: 10px;
}
.sub_menu:hover {
    background: #666;
}
.sub_menu div {
    display: none;
    position: absolute;
    background: #999;
    padding: 10px 0;
    right: 0;
    width: 100%;
}
.sub_menu:hover div {
    display: block;
    background: #666;
}
.sub_menu div a {
    padding: 5px 10px;
}
.sub_menu div a:hover {
    background: #444;
}
main {
    background: #fff;
}
table {
    width: 100%;
}