body {
    margin: 0;
    text-align: center;
    background-color: #FFFFFF;
}

h1 {
    font-size: 30pt;
    font-family: "メイリオ", sans-serif;
    font-weight: bold;
    color: #333333;
}

#content_header {
    margin: 20px 0px;
}

#content_header table {
    border-collapse: separate;
    border-spacing: 10px;
    background-color: #6699CC;
}

#counter {
    background-color: #FFFFFF;
    border: 3px solid #000000;
    padding: 3px 10px;
    width: 150px;
    height: 48px;
    font-size: 12pt;
    font-family: "メイリオ", sans-serif;
    font-weight: bold;
    color: #111111;
    white-space: pre-wrap;
    border-radius: 10px;
}

#timer {
    background-color: #FFFFFF;
    border: 3px solid #000000;
    padding: 7px 10px;
    width: 150px;
    height: 40px;
    font-size: 20pt;
    font-family: "メイリオ", sans-serif;
    font-weight: bold;
    color: #111111;
    border-radius: 10px;
    vertical-align: middle;
}

table {
    text-align: center;
}

#question_pict {
    border: 5px solid #FFF000;
    width: 130px;
    height: 98px;
}

#input_table_num {
	border: 2px solid #000000;
	margin: 5px;
}

#input_table_num span {
	font-size: 14pt;
	font-family: "メイリオ", sans-serif;
	font-weight: bold;
	color: #FFFFFF;
}

#table_row_num, #table_column_num {
	width: 30px;
	height: 30px;
	margin: 5px;
	padding: 0;
	text-align: center;
	font-size: 16pt;
	font-family: "メイリオ", sans-serif;
	font-weight: bold;
	color: #000000;
}

#start_button {
    width: 176px;
    height: 60px;
    font-size: 24pt;
    font-family: "メイリオ", sans-serif;
    font-weight: bold;
    color: #FFFFFF;
    background-color: #FF0000;
    border-radius: 30px;
    text-shadow: 1px 2px 3px #808080;
}

#main_content table {
    border: 3px solid #FFFFFF;
    border-spacing: 10px 5px;
}

#main_content img {
    object-fit: contain;
    border-radius: 10px;
    user-drag: none;
    -webkit-user-drag: none;
    -moz-user-select: none;
}

.button {
    display: inline-block;
    padding: 5px 5px;
    background-color: #6699CC;
    border: 1px solid #6699CC;
    border-radius: 10px;
}

.button img {
    width: 130px;
    height: 98px;
}

.button:hover{
    background-color: #79ACDF;
    box-shadow: inset 0px 0px 3px #FFFFFF;
}

.button:active{
    padding-top: 6px;
    padding-bottom: 4px;
    border: 1px solid #334C66;
}

/*---------------*/
/*  for - 940px  */
/*---------------*/

@media screen and (max-width: 940px) {

#main_content table {
    display: block;
}

#main_content tr {
    display: inline;
}

#main_content td {
    display: inline-block;
}

}

/*---------------*/
/*  for - 540px  */
/*---------------*/

@media screen and (max-width: 540px) {

body {
    position: relative;
}

h1 {
    display: block;
    margin: 0;
    background-color: #FFFFFF
}

#site_header {
    position: fixed;
    top: 0;
    z-index: 100;
}

#main_content {
    position: absolute;
    top: 260px;
}

#content_header {
    margin: 0;
}

#content_header table {
    display: block;
    margin: 0;
}

#content_header tr {
    display: inline;
}

#content_header td {
    display: inline-block;
}

#dashboard {
    display: inline;
}

#dashboard div {
    display: inline-block;
}

#counter {
    float: left;
}

#timer {
    float: right;
}

}


/*---------------*/
/*  for - 480px  */
/*---------------*/

@media screen and (max-width: 480px) {

#site_header {
    position: fixed;
    top: 0;
    background-color: #FFFFFF
    z-index: 100;
}

#main_content {
    position: absolute;
    top: 260px;
}

#content_header table {
    display: block;
}

#content_header tr {
    display: inline;
}

#content_header td {
    display: inline-block;
}

}


/*---------------*/
/*  for - 380px  */
/*---------------*/

@media screen and (max-width: 380px) {

#main_content {
    top: 324px;
}

#counter {
    float: unset;
}

#timer {
    float: unset;
}

}