.drawer-mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
} 
.drawer {
    position: fixed;
    background-color: white;
    z-index: 1001;
    display: none;
    box-shadow: -2px 0 5px rgba(0, 0, 0, 0.2);
}

.drawer-header {
    padding: 15px;
    border-bottom: 1px solid #eee;
    position: relative;
}

.drawer-title {
    font-size: 18px;
    font-weight: bold;
    text-align:center;
}

.drawer-close {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 20px;
    cursor: pointer;
    color: #999;
}

    .drawer-close:hover {
        color: #333;
    }

.drawer-body {
    padding: 15px;
    overflow-y: auto;
    height:800px;
}

.drawer-footer {
    padding: 15px;
    border-top: 1px solid #eee;
    text-align: right;
    position:absolute;
    bottom:30px;
    right:30px;
}

    .drawer-footer button {
        margin-left: 10px;
    }