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

.show_mobile{display: none;}

.clear_{clear: both;height: 80px;}

/* Main container */
#all {
    width:100%;
}

/* Flex container */
.container {
    display: flex;
    position: relative;
    width: 1080px;
    margin-left: auto;
    margin-right: auto;
   /* border: 1px solid red;*/
    flex-direction: row;
}

/* Sub container */
.sub_container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}

.background{
width: 100%;
position: relative;
clear: both;
}

/* Box styling */
.col {
    /*
    background-color: #f4f4f4;
    */
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

/* Different widths for different boxes */
.col_1 {
    flex: 1 1 10%;
    width: 10%;
}
.col_2 {
    flex: 1 1 20%;
    width: 20%;
}
.col_3 {
    flex: 1 1 30%;
    width: 30%;
}
.col_4 {
    flex: 1 1 40%;
    width: 40%;
}
.col_5 {
    flex: 1 1 50%;
    width: 50%;
}
.col_6 {
    flex: 1 1 60%;
    width: 60%;
}
.col_7 {
    flex: 1 1 70%;
    width: 70%;
}
.col_8 {
    flex: 1 1 80%;
    width: 80%;
}
.col_9 {
    flex: 1 1 90%;
    width: 90%;
}
.col_10 {
    flex: 1 1 100%;
    width: 100%;
}


.gambar{
    height:200px;padding: 20px;
}


 /* menu */
 .menu {
    list-style-type: none;
    margin:  0;
    padding: 0;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-left: 100px;
}

.menu li {
    cursor: pointer;
    padding-left: 20px;
    display: inline;
}

.menu li:hover {
    color:#0090ff;
}

.menu li a {
    color: black;
    text-decoration: none;
    display: block;
}

.menu li:hover a {
    color:#0090ff;
    text-decoration: none;
}

#committe h1,h3{ margin-bottom: 15px;}

.img_keynote{width: 200px;width: 200px; position: relative;margin: auto;display: block; border-radius: 50%; margin-bottom: 10px;}
#dates{padding-left: 50px;}

.button_{
    background-color: #0090ff;
    color: #f8f9f9;
    font-family: "Montserrat", sans-serif;
    font-optical-sizing: auto;
    font-weight: 600;
    font-style: normal;
    font-size: 1.2em;
    width: 38%;
    border-radius: 10px; 
    padding: 10px 20px 10px 20px;display: block;margin: 20px;position: relative;margin-left: auto;margin-right: auto;}

    .button_:hover{ background-color: #158ae4;}

 #box_up{
    display: block;
    position: fixed;
    bottom: 0;
    right: 0;
    margin-bottom: 50px;
    margin-right: 50px;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: #0090ff;
    color: white;
    z-index: 99;
    opacity: 0.8;
    cursor: pointer;
 }

 #box_up:hover{
    background-color: #158ae4;
 }
 p.confirmed{margin-top: -15px;text-align: center;}





/* Responsive styles */
@media (max-width: 1080px) {

    p.confirmed{margin-top: 2px;text-align: center;}
    div#all {
       
            max-width:1280px;
            width:100%;
            overflow: hidden;
            position: relative;
            margin: auto;
        
    }

    div.container {
        flex-direction: column;
        width: 100%;
        padding: 50px;
    }

    .sub_container {
        width: 100%; 
    }

    /* Different widths for different boxes */
    .col_1 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_2 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_3 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_4 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_5 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_6 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_7 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_8 {
        flex: 1 1 100%;
        width: 100%;
    }
    .col_9 {
        flex: 1 1 90%;
        width: 100%;
    }
    .col_10 {
        flex: 1 1 100%;
        width: 100%;
    }


    #dates{padding-left: 0px;margin-top: 50px;}

    h1{font-size: 3.4em; margin-bottom: 10px;padding: 0;text-align: center;}
    h2{font-size: 2.2em; padding: 0;margin-bottom: 10px;text-align: center;}
    h3{font-size: 1.3em; margin: 0;padding: 0;text-align: center;}

    .menu {
        list-style-type: none;
        margin:  0;
        padding: 0px;
        display: flex;
        justify-content: flex-end;
        align-items: center;
        margin-left: 0px;
        width: 100%;
        display: block;
    }
    .menu li {
        cursor: pointer;
        padding: 10px;
        display: block;
        border: 1px solid black;
        margin: 10px;
        text-align: center;
    }

    #box_up{
        margin-bottom: 25px;
        margin-right: 25px;
     }

     .button_{
        width: 80%;
        border-radius: 10px; 
        padding: 10px 20px 10px 20px;display: block;margin: 20px;position: relative;margin-left: auto;margin-right: auto;}
    
   .logo_thumb{height: 60px;}
   .show_mobile{display: block;}


   table{
       width: 100%;
   }

   #dates h3{font-size: 2em;}
   #dates h2{font-size: 1.8em;}

   .logo_ideatech{position: relative;float: left;width: 200px;}
   .menu {display: none;}
}