* {
    margin: 0;
    padding: 0;
    box-sizing: border-box
}

body {
    margin-left: 200px;
    padding: 20px;
    color: #222
}

#sidemenu {
    position: fixed;
    left: 0;
    top: 0;
    width: 200px;
    height: 100vh;
    background: #333;
    color: #eee;
    border-right: solid 1px #ccc
}

#sidemenu ul {
    width: 100%
}

#sidemenu ul li {
    height: 50px;
    border-bottom: solid 1px #ccc
}

#sidemenu ul li a {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: #fff;
    text-decoration: none
}

#sidemenu ul li a:hover {
    background: #fff;
    color: #000
}

table {
    width: 100%;
    border-collapse: separate;
    background: #ddd
}

table th {
    background: #333;
    color: #f8f8f8;
    padding: 0 0.5em
}

table td {
    background: #f8f8f8;
    color: #333;
    padding: 0 0.5em;
    height: 40px
}

table.edit_table th {
    width: 250px
}

table.edit_table td {
    padding: 0.5em
}

table.edit_table td input[type="text"],
table.edit_table td input[type="email"],
table.edit_table td select {
    height: 30px;
    width: 100%;
    padding-left: 1em
}

h2 {
    display: flex;
    align-items: center;
    height: 50px;
    width: 100%;
    padding-left: 0.5em;
    background: linear-gradient(90deg, #333, #ccc);
    color: #fff;
    margin-bottom: 40px
}

.button_box {
    margin: 20px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-around
}

.button_box .button {
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 200px;
    height: 40px;
    border: solid 1px #333;
    background: #333;
    color: #fff;
    font-size: 20px;
    font-weight: 900;
    text-decoration: none;
    cursor: pointer
}

.column_box {
    display: flex;
    width: 100%
}

.column_box div {
    margin: 20px;
    width: 100%
}

.column_box table {
    width: 100%
}