html, body {
    height: 100%;
    background-color: #4B4B4B;
    overflow: hidden;
}


#welcome_panel {
    margin: 0 auto;
    border-radius: 5px;
    width: 100%;
    height: 70%;
}

#welcome_name {
    text-align: center;
    height: 30px;
    color: #3BAFFA;
    font-size: 28px;
}

#system_name {
    text-align: center;
    height: 50px;
    color: #3BAFFA;
    font-size: 40px;
}

#button_area {
    text-align: center;
    margin:0 auto;
}

#monitor_button {
    background-color: #3BAFFA;
    height: 40px;
    width: 100px;
    border-radius: 5px;
    font-size: 15px;
    color: #FFFFFF;
    border: 0;
}


#welcome_left, #welcome_right {
    height: 30vw;
    width: 20vw;
    border-radius: 10px;
    margin: 10% 0 0 20%;
    display: block;
    float: left;
}

.title {
    height: 50px;
    background-color: #3BAFFA;
    text-align: center;
    font-size: 1.5vw;
    line-height: 50px;
    border-radius: 10px;
    color: #FFFFFF;
}

.content {
    height: 15vw;
    background-color: #FFFFFF;
    margin-top: -2vw;
}

#user_num, #device_num {
    height: 8vw;
    width: 6vw;
    border-radius: 5px;
    display: block;
    float: left;
    margin: 3.5vw 2vw;
    background-color: #3BAFFA;
}

#alert_num {
    height: 8vw;
    width: 6vw;
    border-radius: 5px;
    margin: 3.5vw 7vw 0 7vw;
    display: block;
    float: left;
    background-color: #3BAFFA;
}

.num {
    height: 4vw;
    text-align: center;
    font-size: 3vw;
    color: #FFFFFF;
    margin-top: 1vw;
    margin-bottom: 20px;
}

.desc {
    text-align: center;
    font-size: 1vw;
    color: #FFFFFF;
    margin-top: -10%;
}