.header {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 60px;
    position: fixed;
    top: 0;
    border-bottom: 1px solid #cacaca;
    background-color: #fafafa;
}

.header .logo {
    flex: 0 0 auto;
    width: 200px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.header .logo a {
    color: #1e9fff;
    font-size: 20px;
}

.header .label {
    flex: 1 1 auto;
    height: 60px;
}

.header .menu {
    flex: 0 0 auto;
    width: 420px;
    height: 60px;
}

.body {
    padding-top: 60px;
    box-sizing: border-box;
    height: 100vh;
    display: flex;
    flex-direction: row;
}

.body .menu {
    flex: 0 0 auto;
    width: 230px;
    overflow-y: scroll;
}

.body .markdown-content {
    flex: 1 1 auto;
    overflow: auto;
}