@charset "utf-8";


/*
html5doctor.com Reset Stylesheet
v1.6.1
Last Updated: 2010-09-17
Author: Richard Clark - http://richclarkdesign.com
Twitter: @rich_clark
*/

html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6,  blockquote, pre,
abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, samp,
small, strong, sub, sup, var,
b, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure,
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}

body{
    margin: 0 auto;
    height: 100%;
    padding: 0;
    max-width: 1500px;
    color: #333;
    font:20px;
    font-family: 'Kosugi', sans-serif;
    line-height: 1.5;
    background: #fff;
    overflow-x: hidden;
    /*text-align: center;*/
    -webkit-text-size-adjust: none;
}

article,aside,details,figcaption,figure,
footer,header,hgroup,menu,nav,section {
    display: block;
}

nav ul {
    list-style: none;
}

blockquote, q {
    quotes: none;
}

blockquote: before, blockquote: after,
q:before, q: after {
    content: '';
    content: none;
}

a {
    margin: 0;
    padding: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}

/* change colours to suit your needs */
ins {
    background-color: #ff9;
    color: #000;
    text-decoration: none;
}

/* change colours to suit your needs */
mark {
    background-color: #ff9;
    color: #000;
    font-style: italic;
    font-weight: bold;
}

del {
    text-decoration: line-through;
}

abbr[title], dfn[title] {
    border-bottom:1px dotted;
    cursor: help;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* change border colour to suit your needs */
hr {
    display: block;
    height: 1px;
    border: 0;  
    border-top: 1px solid #cccccc;
    margin: 1em 0;
    padding: 0;
}

input, select {
    vertical-align: middle;
}


/* link
------------------------------------------------------------*/
a{
    color: #007700;
    text-decoration: none;
    font-size: 18px;
}

a:hover{
    color: #007700;
}

a:active, a:focus{
    outline: 0;
}


/* Global */

div { word-break: break-all;
}

img { max-width:100%;
}

a {
	-webkit-transition: all 150ms ease;
	-moz-transition: all 150ms ease;
	-ms-transition: all 150ms ease;
	-o-transition: all 150ms ease;
	transition: all 150ms ease;
}

a:hover {
    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)"; /* IE 8 */
    filter: alpha(opacity=50); /* IE7 */
    opacity: 0.6;
    text-decoration: none;
}

/*
------------------------------------------------------------*/

            /*    header 

============================================================*/
                        /* ====================================*/

/*----------------------------------
  		   container
  	================================*/

#main_container {
    /*background-image: url(../img/arakawa_back_img.png);*/
    /*margin: 0px auto 10px;
    padding: 20px 0px;*/
    width: 100vw;
    height: auto;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(((100vw - 100%) / 2) * -1);
    /*box-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);*/
}


/*----------------------------------
  		   header top menu
  	================================*/

.header_top {
    display: flex;
    width: 100%;
    height: 100px;
    background-color: #007700;
}

.header_logo {
    width: 220px;
    height: auto;
}

.header_logo img {
    width: 100%;
    height: auto;
    margin-left: 50px;
    padding-top: 15px;
}

.menu_icon {
    width: auto;
    height: 85px;
    text-align: right;
    margin-left: auto;
    padding-right: 40px;
    border-radius: 5px;
    margin-top: 5px;
}

.menu_icon ul {
    list-style: none;
    display: flex;
    top: 0px;
}

.menu_icon li .fab {
    font-size: 16px;
    padding-top: 8px;
    padding-right: 5px;
    color: #fff;
}

.menu_icon li a {
    display: block;
    font-size: 17px;
    color: #007700;
    font-weight: 600;
    font-family: 'Open Sans', sans-serif;
    letter-spacing: -1px;
    padding: 0px 8px;
}

.menu_icon p {
    margin-top: 4px;
    font-size: 16px;
    text-align: center;
    background-color: #fff;
    border-radius: 10px;
    color: #fff;
    padding: 0px 10px;
}

.menu_icon p span {
    color: #ff8c00;
    font-size: 17px;
}

.menu_icon img {
    width: 20px;
    height: auto;
    padding-top: 3px;
    padding-left: 0px;
    padding-right: 3px;
}

.menu_icon a .fa-video {
    padding-right: 5px;
    line-height: 1.5;
}

.menu_icon a .fa-book-open {
    padding-right: 5px;
    line-height: 1.5;
}

.menu_icon .fa-subway {
    padding-right: 5px;
    color: #ff8c00;
}

.menu_icon .facebook_wrap {
    width: auto;
    height: 26px;
    background-color: #fff;
    margin-bottom: 5px;
    margin-right: 5px;
}

.middle_menu {
    display: flex;
    width: auto;
    height: 27px;
    margin-bottom: 7px;
}

.middle_menu .link_menu p {
    font-size: 17px;
}

.middle_menu .link_menu a {
    color: #007700;
}

.facebook_wrap a {
    font-size: 21px;
    color: #1977F1;
    padding: 0px 8px;
}

.menu_icon .access_wrap {
    width: auto;
    height: 26px;
    background-color: #fff;
    margin-bottom: 0px;
    margin-top: 0px;
}

.video_wrap {
    width: auto;
    height: 26px;
    background-color: #fff;
    border-radius: 10px;
    padding: 0px 10px;
    margin-top: 2px;
    margin-right: 5px;
}

.pam_wrap {
    width: auto;
    height: 26px;
    background-color: #fff;
    border-radius: 10px;
    padding: 0px 10px;
    margin-top: 2px;
}

/*
------------------------------------------------------------*/

            /*    navigation menu panel

============================================================*/
                        /* ====================================*/

#panelcontainer {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 25vh;
    /*in-width: 1440px;*/
}

#panelcontainer:hover > .nav_menu {
  -webkit-filter: brightness(22%);
          filter: brightness(22%);
    transition: 0.8s linear;
}

#panelcontainer:hover > .nav_menu:hover {
  -webkit-filter: brightness(100%);
          filter: brightness(100%);
    transition: 0.8s linear;
}

#panelcontainer.nav_menu {
    flex-grow: 1;
    position: relative;
    height: 100%;
    transition: all 0.4s;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    text-align: center;
    flex: 1;
}

#panelcontainer .nav_menu .cont_title {
    position: relative;
    margin: auto;
    width: 100%;
    height: auto;
    text-align: center;
    margin-top: 5vh;
}

#panelcontainer .nav_menu .cont_title h1 {
    text-transform: uppercase;
    color: white;
    font-family: 'Kosugi', sans-serif;
    text-shadow: 1px 2px 5px rgba(0, 0, 0, 0.5);
    font-size: 1.5vw;
    margin: 0;
    transition: font-size 0.3s;
    vertical-align: middle;
}

#panelcontainer .nav_menu .cont_title h2 {
    text-transform: uppercase;
    color: white;
    font-family: 'Kosugi', sans-serif;
    text-shadow: 1px 2px 5px rgba(0, 0, 0, 0.5);
    font-size: 1.0vw;
    margin: 0;
    transition: font-size 0.3s;
    vertical-align: middle;
}

#panelcontainer .nav_menu .cont_title h3 {
    text-transform: uppercase;
    font-family: 'Kosugi', sans-serif;
    font-size: 1.0vw;
    transition: all 0.3s;
    color: white;
    letter-spacing: 2px;
    text-shadow: 1px 2px 5px rgba(0, 0, 0, 0.5);
}

            /*説明文*/
#panelcontainer .nav_menu .cont_desc {
    position: relative;
    display: block;
    text-align: center;
    width: 16vw;
    height: auto;
    margin: auto;
    opacity: 0;
    transition: opacity 0.8s, padding-top 0.9s, -webkit-transform 0.7s;
    transition: opacity 0.8s, transform 0.7s, padding-top 0.9s;
    transition: opacity 0.8s, transform 0.7s, padding-top 0.9s, -webkit-transform 0.7s;
    padding-top: 6vh;
    -webkit-transform: scale(1);
            transform: scale(1);
}

#panelcontainer .nav_menu .cont_desc p {
    margin: 0;
    font-family: 'Kosugi', sans-serif;
    color: white;
    font-size: 10px;
}
            /*説明文*/
#panelcontainer .nav_menu:hover {
    flex-grow: 1.8;
    transition: flex 0.2s;
}

#panelcontainer .nav_menu:hover > .cont_title h1 {
    font-size: 1.8vw;
    transition: font-size 0.4s;
}

#panelcontainer .nav_menu:hover > .cont_title h3 {
    font-size: 1.3vw;
    transition: all 0.4s;
}

#panelcontainer .nav_menu:hover > .cont_desc {
    opacity: 1;
    padding-top: 2vh;
    -webkit-transform: scale(1.5);
            transform: scale(1.5);
    transition: opacity 0.7s, padding-top 0.5s, -webkit-transform 0.1s;
    transition: opacity 0.7s, padding-top 0.5s, transform 0.1s;
    transition: opacity 0.7s, padding-top 0.5s, transform 0.1s, -webkit-transform 0.1s;
    transition-delay: 0s, 0.1s, 0s;
}


#panelcontainer .nav_menu:nth-child(1) {
    background: url("../img/Arakawa-1.jpg") center;
    height: 25vh;
}

#panelcontainer .nav_menu:nth-child(2) {
    background: url("../img/Arakawa-2.jpg") center;
    height: 25vh;
}

#panelcontainer .nav_menu:nth-child(3) {
    background: url("../img/Arakawa-3.jpg") center;
    height: 25vh;
}

#panelcontainer .nav_menu:nth-child(4) {
    background: url("../img/Arakawa-4.jpg") center;
    height: 25vh;
}

#panelcontainer .nav_menu:nth-child(5) {
    background: url("../img/Arakawa-16.jpg") center;
    height: 25vh;
}


/*
------------------------------------------------------------*/

 /*   section 01 main wrapper 荒川の概要と太郎右衛門地区周辺の変遷

============================================================*/
                        /* ====================================*/

.main_title {
    width: 80%;
    margin: 0 auto;
    font-size: 20px;
    color:#007700;
    border-bottom: 3px solid #007700;
}

.main_title {
    width: 80%;
}

.main_title h2 {
    font-size: 180%;
    color: #0f0f0f;
    padding-left: 10px;
}

.heading {
    margin-bottom: 0px; 
}

.main .heading {
    position: relative;
    padding-left: 50px;
    color:#007700;
}

.main .heading:before,
.main .heading:after{
    content: "□";
    position: absolute;
    width:10px;
    height: 10px;
}

.main .heading:before {
    left: 0;
    top:4px;
    font-size: 28px;
}

.main .heading:after {
    left: 7.5px;
    top: 14.5px;
    font-size: 28px;
}

/*----------------------------------
  		   荒川とは？
  	================================*/


.main_wrapper {
    width: 100%;
    margin: 0 auto;
}

.main_wrap {
    width: 83.5%;
    height: auto;
    margin: 0 auto;
    margin-top: 30px;
}

.main_inner {
    width: 100%;
    height: auto;
    margin: 0 auto;
    margin-top: 30px;
    justify-content: center;
}

.figure_box{
    width: 85%;
    height: auto;
    margin: 0 auto;
}

.figure_box .caption {
    width: 80%;
    font-size: 1.5em;
    position: relative;
    padding: 0 .5em .2em 1.7em;
    border-bottom: 2px solid #007700;
    margin: 0 auto;
    color: #007700;
}

.figure_box .caption::after {
    position: absolute;
    top: .4em;
    left: .2em;
    z-index: 2;
    content: '';
    width: 13px;
    height: 13px;
    border: 3px solid #007700;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
    font-size: 25px;
}

.figure_inner {
    width: 75%;
    height: auto;
    margin-top: 50px;
    margin: 0 auto;
    text-align: center;
}

.main_figure_01 {
    width: auto;
    height: auto;
    padding-top: 30px;
    margin: 0 auto;
}

.main_figure_01 img {
    max-width: 700px;
    width: 100%;
    height: auto;
    text-align: center;
}

.figure_txt_inner {
    width: 65%;
    height: auto;
    background-color: rgba(255, 255, 255, 0.7);
    margin: 0 auto;
    padding-top: 20px;
}

.caption_box {
    width: 98%;
    border: 3px solid #007700;
    border-radius: 15px;
    margin: 0 auto;
}

.caption_txt {
    width: 90%;
    margin: 0 auto;
    padding: 20px;
}

/*----------------------------------
  		   旧流路の変遷
  	================================*/

.second_wrapper {
    display: flex;
    width: 89%;
    height: auto;
    margin: 0 auto;
    margin-top: 30px;
    /*justify-content: center;*/
}

.figure_box_second {
    width: 80%;
    height: auto;
    margin: 0 auto;
    margin-top: 20px;
}

.figure_box_second .caption::after {
    position: absolute;
    top: .4em;
    left: .2em;
    z-index: 2;
    content: '';
    width: 13px;
    height: 13px;
    border: 3px solid #007700;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
    font-size: 25px;
}

.figure_box_second .caption{
    width: 80%;
    margin-top: 50px;
    font-size: 1.5em;
    padding: 0 .5em .2em 1.7em;
    position: relative;
    border-bottom: 2px solid #007700;
    margin: 0 auto;
    color: #007700;
}

.figure_second_inner {
    width: 90%;
    height: auto;
    display: flex;
    justify-content: center;
    padding-top: 20px;
    margin: 0 auto;
}

.main_figure_02_01, .main_figure_03_01 {
    width: 400px;
    height: 300px;
}

.main_figure_02_02, .main_figure_03_02 {
    width: 400px;
    height: auto;
}

.main_figure_02_01 img, .main_figure_03_01 img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.main_figure_02_02 img, .main_figure_03_02 img {
    width: 100%;
    height: auto;
}

.arrow02 {
    width: auto;
    height: 500px;
    display: table;
    padding: 0px 20px;
}

.arrow02_wrap {
    display: table-cell;
    vertical-align: middle;
}

.second_inner_wrap {
    width: 75%;
    height: auto;
    padding-top: 20px;
    margin: 0 auto;
}

.second_inner_txt {
    width: 80%;
    padding: 28px;
    margin: 0 auto;
    border: 3px solid #007700;
    border-radius: 15px;
}

/*----------------------------------
　　　自然再生地で確認されている外来種生物
  	================================*/

.third_wrapper {
    width: 89%;
    margin: 0 auto;
    padding-top: 30px;
}

.figure_third_inner {
    width: 80%;
    height: auto;
    margin: 0 auto;
    margin-top: 20px;
}

.figure_third_inner .caption::after {
    position: absolute;
    top: .4em;
    left: .2em;
    z-index: 2;
    content: '';
    width: 13px;
    height: 13px;
    border: 3px solid #007700;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
    font-size: 25px;
}

.figure_third_inner .caption{
    position: relative;
    width: 80%;
    margin-top: 50px;
    font-size: 1.5em;
    padding: 0 .5em .2em 1.7em;
    border-bottom: 2px solid #007700;
    margin: 0 auto;
    color: #007700;
}

.figure_third_inner p {
    width: 80%;
    padding: 15px 0px 30px 0px;
    margin: 0 auto;
}

.third_figure_contents {
    width: 80%;
    margin: 0 auto;
}

/*---------------
　　　特定外来生物
  	=============*/

.figure_wrapper_01 {
    width: 90%;
    border: 3px solid #dc143c;
    margin: 0 auto;
}

.inner_01 {
    margin-bottom: 30px;
}

.figure_inner_01 {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    justify-content: center;
    margin: 0 auto;
    padding-bottom: 15px;
}

.figure_wrapper_01 p {
    width: 18%;
    margin-top: 0px;
    margin-left: 0px;
    padding-top: 5px;
    padding-bottom: 5px;
    margin-bottom: 0px;
    font-size: 1.2em;
    color: #fff;
    background-color: #dc143c;
    text-align: center;
}

.figure_img_01 figcaption {
    color: #dc143c;
    display: inline-block;
    line-height: 1.3;
    vertical-align: middle;
    font-size: 16px;
    font-weight: bold;
    margin-top: -10px;
}

.figure_img_01 {
    width: 250px;
    height: auto;
    padding: 10px;
}

.figure_img_01 img {
    width: 100%;
    height: auto;
}

/*-----------
　　　外来生物
  	==========*/

.figure_wrapper_02 {
    width: 90%;
    border: 3px solid #ff8c00;
    margin: 0 auto;
}


.figure_inner_02 {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    justify-content: center;
    margin: 0 auto;
    padding-bottom: 15px;
}

.figure_wrapper_02 p {
    width: 18%;
    margin-top: 0px;
    margin-left: 0px;
    padding-top: 5px;
    padding-bottom: 5px;
    margin-bottom: 0px;
    font-size: 1.2em;
    color: #fff;
    background-color: #ff8c00;
    text-align: center;
}

.figure_img_02 figcaption {
    font-size: 16px;
    font-weight: bold;
    color: #ff8c00;
    top: 0px;
    display: inline-block;
    line-height: 1.3;
    vertical-align: middle;
    margin-top: -10px;
}

.figure_img_02 {
    width: 250px;
    height: auto;
    padding: 10px;
}

.figure_img_02 img {
    width: 100%;
    height: auto;
}

/*
------------------------------------------------------------*/

      /*   section 02 primary wrapper 自然再生に向けての取組み

============================================================*/
                        /* ====================================*/

.primary_wrapper {
    width: 90%;
    margin: 0 auto;
    margin-top: 50px;
    margin-bottom: 50px;
}

.primary_wrap {
    width: 93%;
    margin: 0 auto;
    padding-bottom: 50px;
}

.main_inner_primary {
    width: 100%;
    margin-bottom: 40px;
}

.primary_inner p {
    width: 75%;
    margin: 0 auto;
    padding-top: 20px;
}

/*----------------------------------
  		   湿地環境の保全
  	================================*/

.primary_inner01 p {
    width: 92%;
    margin: 0 auto;
}

.primary_inner01 {
    position: relative;
    width: 54%;
    height: auto;
    border: 2px solid #007700;
    border-radius: 10px;
    margin: 0 auto;
    margin-top: 50px;
    padding-bottom: 10px;
}

.primary_inner01 .primary_cap {
    position: absolute;
    top: 0;
    left: 0;
    font-size: 1.3em;
    color: #007700;
    padding: 0 1em;
    margin: 0;
    background-color: #fff;
    transform: translateY(-50%) translateX(1em);
}

/*----------------------------------
　　過去に確認された生物が住める環境の再生
  	================================*/

.primary_inner02 {
    position: relative;
    width: 54%;
    height: auto;
    border: 2px solid #007700;
    border-radius: 10px;
    margin: 0 auto;
    margin-top: 50px;
    padding-bottom: 10px;
}

.primary_inner02 .primary_cap {
    position: absolute;
    top: 0;
    left: 0;
    font-size: 1.3em;
    color: #007700;
    padding: 0 1em;
    margin: 0;
    background-color: #fff;
    transform: translateY(-50%) translateX(1em);
}

.primary_inner02 p {
    width: 92%;
    margin: 0 auto;
}

/*----------------------------------
　　　再生によって期待する生態系イメージ
  	================================*/

.cat_wrapper {
    width: 90%;
    height: auto;
    margin: 0 auto;
}

.main_cat {
    width: 80%;
    height: auto;
    margin: 0 auto;
}

.cat_inner {
    width: 80%;
    margin: 0 auto;
    margin-left: 120px;
}

.cat_wrapper h4 {
  color: #fff;
  padding: 0.5em;
  display: inline-block;
  line-height: 1.3;
  background: #00b300;
  vertical-align: middle;
  border-radius: 25px 0px 0px 25px;
}

.cat_wrapper h4:before {
  content: '●';
  color: white;
  margin-right: 8px;
}

.cat_img_inner {
    display: flex;
    position: relative;
    width: 100%;
    height: auto;
    margin: 0 auto;
    padding-top: 20px;
    justify-content: space-between;
    align-items: flex-end;
}

.cat_img_left {
    width: 350px;
    height: 100%;
    text-align: center;
}

.cat_img_right {
    width: 600px;
    height: 100%;
    text-align: center;
}

.cat_img_left img {
    width: 100%;
    height: auto;
}

cat_img_right img {
    width: 100%;
    height: auto;
}

.cat_img_left h5 {
  position: relative;
  line-height: 1.4;
  padding:0.25em 1em;
  display: inline-block;
  top:-10px;
}

.cat_img_right h5 {
  position: relative;
  line-height: 1.4;
  padding:0.25em 1em;
  display: inline-block;
  top:-10px;
  left: 15px;    
}

.cat_img_left h5:before, .cat_img_left h5:after { 
  position: absolute;
  top: 0;
  content:'';
  width: 8px;
  height: 100%;
  display: inline-block;
}

.cat_img_left h5:before {
  border-left: solid 2px #007700;
  border-top: solid 2px #007700;
  border-bottom: solid 2px #007700;
  left: 0;
}

.cat_img_left h5:after {
  content: '';
  border-top: solid 2px #007700;
  border-right: solid 2px #007700;
  border-bottom: solid 2px #007700;
  right: 0;
}

.cat_img_center {
    width: 200px;
    height: 300px;
    margin: 0 auto;
}

.cat_figure_center {
    width: 100%;
    height: auto;
    margin: 0 auto;
    line-height: 100px;
}

.cat_img_right h5:before, .cat_img_right h5:after { 
  position: absolute;
  top: 0px;
  content:'';
  width: 8px;
  height: 100%;
  display: inline-block;
}

.cat_img_right h5:before {
  border-left: solid 2px #007700;
  border-top: solid 2px #007700;
  border-bottom: solid 2px #007700;
  left: 0;
}

.cat_img_right h5:after {
  content: '';
  border-top: solid 2px #007700;
  border-right: solid 2px #007700;
  border-bottom: solid 2px #007700;
  right: 0;
}


/*----------------------------------
　　          pagetop button
  	================================*/

.to_top{
  position: fixed;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 150px;
  right: 10px;
  bottom: 20px;
  font-size: 50px;
  font-weight: bold;
  color: #fff;
  cursor: pointer;
}

/*
------------------------------------------------------------*/

            /*    Footer

============================================================*/
                        /* ====================================*/

#footer {
    width: 100vw;
    height: 30px;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(((100vw - 100%) / 2) * -1);
    background-color: #007700;
    padding: 0;
    margin: 0;
}

.copyright p {
    font-family: 'Work Sans', sans-serif;
    font-size: 15px;
    color: #fff;
    text-align: center;
    padding-top: 5px;
}