SplitScreen.css

html{
    display: inline-table;
}
body{
    width: 300px;
}
#SplitScreen{
    width: 148px;
    line-height: 1;
    border: 1px solid #dcdfe6;
    -webkit-appearance: none;
    text-align: center;
    font-weight: 600;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    padding: 12px 20px;
    font-size: 14px;
    border-radius: 4px;
    color: #fff;
    background-color: #67c23a;
    border-color: #67c23a;
}
#SplitScreen:hover{
    background: #85ce61;
    border-color: #85ce61;
}
#clean{
    width: 148px;
    line-height: 1;
    border: 1px solid #dcdfe6;
    -webkit-appearance: none;
    text-align: center;
    font-weight: 600;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    padding: 12px 20px;
    font-size: 14px;
    border-radius: 4px;
    color: #fff;
    background-color: #f56c6c;
    border-color: #f56c6c;
}
#clean:hover{
    background: #f78989;
    border-color: #f78989;
}
input[placeholder]{
    width: 300px;
    -webkit-appearance: none;
    background-color: #fff;
    background-image: none;
    border-radius: 4px;
    border: 1px solid #dcdfe6;
    box-sizing: border-box;
    color: #606266;
    display: inline-block;
    font-size: inherit;
    height: 40px;
    line-height: 40px;
    outline: none;
    padding: 0 15px;
}
input{
    margin-bottom: 6px;
}
#alert{
    font-weight: 600;
    text-align: center;
    padding: 8px 16px;
    border-radius: 4px;
    background-color: #f56c6c;
    color: #fff;
    font-size: 13px;
}