body {
    margin: 0;
    width: 100%;
    height: 100vh;
    font-family: 'メイリオ', serif;
  }

  .wrap {
    display: flex;
    min-height: 100lvh;
    flex-direction: column;
  }

  #header {
    opacity: 0.75;
    width: 100%;
    height: 30vh;
  }

  .ksc-logo {
    width: 3%;
    display: block;
    margin: 0 70px;
    position: relative;
    top: 55px;
  }

  p.top-title {
    margin-top: auto;
    margin-left: 7%;
  }

  .top-title {
    font-size: 2rem;
    width: 90%;
    height: auto;
    font-weight: bolder;
  }

  .btn-menu {
    display: none;
  }

  nav {
    list-style: none;
    display: flex;
    justify-content: flex-end;
    position: relative;
    right: 2%;
  }

  nav a:hover {
    opacity: 0.75;
  }

  nav a {
    text-decoration: none;
    font-size: 1.3rem;
    color: #000;
    font-weight: bolder;
    margin-left: 80px;
    outline: none;
  }

  li.has-menu:hover .sub-menu {
    display: block;
    position: relative;
  }

  li.has-menu .sub-menu {
    display: none;
    padding: 1rem 2rem 1rem 0;
    position: absolute;
    background-color: #93cdd8;
    list-style: none;
    left: 16%;
  }

  .font_policy {
    margin-left: 1rem;
  }

  #main {
    width: 100%;
    height: auto;
  }

  .environment {
    margin-left: 69rem;
    width: 50%;
    opacity: .75;
    margin-top: 3rem;
  }

  .title-name {
    font-size: 3rem;
    padding-left: 10rem;
    position: relative;
    bottom: 30rem;
    font-weight: bolder;
  }

  .title-sub {
    font-size: 2.5rem;
    padding-left: 10rem;
    margin-top: -510px;
    font-weight: bold;
    width: 35%;
  }

  .img {
    display: flex;
    margin-top: 260px;
  }

  .background {
    width: 200px;
    height: 200px;
    background: linear-gradient(90deg,#2f96be, #6dbdd1);
    border-radius: 50%;
    position: relative;
    left: 78rem;
    top: 10rem;
  }

  .circle {
    width: 400px;
    height: 400px;                              
    background: linear-gradient(90deg,#228cbd, #77b2bd);
    border-radius: 50%;
    position: relative;
    left: 80rem;
    bottom: 8rem;
  }

  .water {
    display: block;
    margin-left: -8rem;
    margin-top: 15rem;
  }

  .water_img {
    width: 600px;
  }

  /* .senior {
    font-size: 45px;
    display: flex;
    justify-content: center;
    margin-top: 40px;
  }

  .interview {
    font-weight: bold;
    font-size: 45px;
    display: flex;
    justify-content: center;
    margin-top: 100px;
  } */

  .work-content_ttl {
    font-size: 3rem;
    font-weight: bold;
    margin-left: 5%;
  }

  .about-company {
    font-size: 2rem;
    margin-left: 7%;
    width: 85%;
  }

  .work-facility {
    font-size: 2rem;
    margin-left: 7%;
  }

  dl {
    display: flex;
  }

  .work-gas {
    font-size: 2rem;
    margin-left: 14%;
  }

  .work-introduce_ttl {
    font-size: 3rem;
    font-weight: bold;
    margin-left: 5%;
  }

  .facility {
    font-size: 2.5rem;
    margin-left: 7%;
    text-decoration: underline 5px #2f96be;
  }

  .factory {
    font-size: 2rem;
    margin-left: 7%;
  }

  .factory-txt {
    font-size: 2rem;
    margin-left: 7%;
    width: 85%;
  }

  .facility-img {
    display: flex;
    justify-content: space-around;
    margin-top: 60px;
  }

  .work_img {
    width: 600px;
  }

  .facility-sistem {
    margin-left: 60px;
  }

  .facility-sistem_txt {
    font-size: 1.5rem;
  }

  .facility-check_txt {
    font-size: 1.5rem;
  }

  .facility-cover {
    margin-right: 60px;
  }

  .facility-cover_txt {
    font-size: 1.5rem;
  }

  .recruit-information {
    font-size: 3rem;
    font-weight: bold;
    margin-left: 5%;
  }

  .date {
    font-size: 2rem;
    margin-left: 7%;
  }

  table {
    border: 1px solid #968f8f;
    margin: 3% 0 5% 7%;
    font-size: 2rem;
    width: 80%;
    height: auto;
  }

  th {
    padding: 1.8rem;
    background-color: #b9b4b4;
    border-right: 1px solid #968f8f;
  }

  td {
    border-top: 1px solid #968f8f;
    padding-left: 40px;
    width: 1px;
  }
  
  .item {
    border-right: 1px solid #968f8f;
  }

  .engineer {
    border-right: 1px solid #968f8f;
    width: 28%;
  }

  .recruitment_closed {
    opacity: 0.5;
    position: relative;
  }

  .recruitment_closed-message {
    background-color: rgb(107, 105, 105);
    border: 1px solid #4c4a4a;
    padding: 30px 50px;
    display: block;
    margin-top: 20%;
    width: fit-content;
    position: absolute;
    left: 40%;
    border-radius: 50%;
    font-size: 1.3rem;
    color: #fff;
  }

  .contact-btn {
    background-color: #228cbd;
    color: #fff;
    padding: 2%;
    border-radius: 20px;
    position: relative;
    left: 40%;
    top: 30px;
    font-size: 2rem;
    text-decoration: none;
  }

  .page-top_btn {
    position: fixed;
    bottom: 100px;
    right: 40px;
    font-weight: bold;
    text-align: center;
    padding: 8px 20px 0px 20px;
    background: black;
    color: #fff;
    /* transition: 0.3s0; */
    text-decoration: none;
    font-size: 2rem;
  }

  #footer {
    width: 100%;
    height: auto;
    background-color: #494040;
    margin-top: 13rem;
  }

  .footer-nav {
    width: 101%;
    height: 10vh;
    padding-top: 10rem;
    display: flex;
    justify-content: center;
  }

  .footer-font {
    color: #fff;
  }

  .footer-sub_menu {
    color: #fff;
    margin-top: -5rem;
    list-style: none;
  }

  li.footer-has_menu:hover .footer-sub_menu {
    display: block;
    position: relative;
  }

  li.footer-has_menu .footer-sub_menu {
    display: none;
    padding: 1rem 0;
    position: absolute;
    background-color: #93cdd8;
    list-style: none;
    left: 3rem;
    top: 6rem;
  }

  .footer-font_policy {
    position: relative;
    left: -3rem;
    color: #fff;
  }

  small {
    display: block;
    text-align: center;
    color: #fff;
    padding-top: 13rem;
  }

/* モバイルサイズ調整 */

@media screen and (max-width: 1280px) {
  #header {
    width: 100%;
  }
  
  .ksc-logo {
    width: 4%;
    margin: 0 35px;
    top: 35px;
  }

  p.top-title {
    margin-left: 8%;
    font-size: 1.5rem;
  }

  nav {
    bottom: 0;
  }

  nav a {
    font-size: 1rem;
    margin-left: 40px;
  }

  li.has-menu .sub-menu {
    left: 1rem;
    padding: 0.3rem 1rem 0.3rem 0;
  }

  .font_policy {
    margin-left: 1rem;
    left: 0;
  }

  .environment {
    margin-left: 38rem;
    margin-top: 4rem;
    width: 45%;
  }

  .title-name {
    font-size: 2rem;
    padding-left: 5rem;
    bottom: 20rem;
  }

  .title-sub {
    font-size: 1.5rem;
    padding-left: 5rem;
    margin-top: -345px;
    width: 40%;
  }

  .background {
    left: 40rem;
  }

  .circle {
    left: 40rem;
    width: 380px;
    height: 380px;
    bottom: 7rem;
  }

  .water {
    margin-left: -30rem;
    margin-top: 20rem;
  }

  .water_img {
    width: 500px;
  }

  .work_img {
    width: 390px;
  }

  table {
    margin-left: 2%;
    width: 95%;
  }

  .recruitment_closed-message {
    margin-top: 14%;
    padding: 30px 3px;
    font-size: 1rem;
    border-radius: 48%;
    left: 65%;
  }

  .contact-btn {
    font-size: 1.5rem;
    left: 38%;
  }

  li.footer-has_menu .footer-sub_menu {
    left: 1rem; 
  }

  .footer-font_policy {
    left: -1rem;
  }
}

@media screen and (max-width: 768px) {
  #header {
    display: flex;
  }

  .hamburger {
    position: relative;
    display: block;
    margin: 0 0 0 auto;
    width: 50px;
    height: 50px;
    cursor: pointer;
    z-index: 300;
  }
  
  .hamburger__line {
    position: absolute;
    width: 30px;
    height: 6px;
    right: 4px;
    background-color: black;
    transition: all 0.5s;
  }
  
  .hamburger__line--1 {
    top: 1px;
    width: 50px;
    margin-top: 15px;
  }
  
  .hamburger__line--2 {
    top: 10px;
    width: 50px;
    margin-top: 20px;
  }
  
  .hamburger__line--3 {
    top: 20px;
    width: 50px;
    margin-top: 23px;
  }
  
  /*ハンバーガーがクリックされたら*/
  .open .hamburger__line--1 {
    transform: rotate(-45deg);
    top: 11px;
  }
  
  .open .hamburger__line--2 {
    opacity: 0;
  }
  
  .open .hamburger__line--3 {
    transform: rotate(47deg);
    top: 4px;
  }
  
  /* 
  sp-nav(ナビ)
  =================================== */
  nav {
    position: absolute;
    right: 100%; /*ハンバーガーがクリックされる前はWindow右側に隠す*/
    top: 0;
    width: 50%; /* 出てくるスライドメニューの幅 */
    height: 100vh;
    background-color: #fff;
    transition: all 0.5s;
    z-index: 999;
    overflow-y: auto; /* メニューが多くなったらスクロールできるように */
    display: block;
  }
  
  /*ハンバーガーがクリックされたら右からスライド*/
  .open nav {
    right: 490px;
  }

    /* 
  black-bg(ハンバーガーメニュー解除用bg)
  =================================== */
  .black-bg {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 130vh;
    z-index: 5;
    background-color: #000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s;
    cursor: pointer;
    z-index: 100;
  }

  /*ハンバーガーメニューが開いたら表示*/
  .open .black-bg {
    opacity: 0.3;
    visibility: visible;
  }

  .ksc-logo {
    width: 20%;
    padding-left: 3rem;
    padding-top: 5rem;
  }

  p.top-title {
    /* top: -9rem;
    left: 2rem; */
  }

  .footer-nav {
    background-color: #494040;
  }
}

@media screen and (max-width: 480px) {
  #header {
    height: 20vh;
    width: 100%;
  }

  .ksc-logo {
    width: 12%;
    padding-top: 2.8rem;
    padding-left: 0;
    top: -13px;
    margin: 0 25px;
  }

  .title {
    width: 80%;
  }

  .top-title {
    bottom: 7.5rem;
    left: 7rem;
  }

  p.top-title {
    font-size: 1.1rem;
    margin-left: 4.3rem;
    margin-top: -2.5rem;
  }

  .hamburger {
    position: relative;
    top: 1.3rem;
    left: 0;
  } 

  .hamburger__line--1 {
    top: 4px;
    width: 40px;
  }

  .hamburger__line--2 {
    width: 40px;
  }

  .hamburger__line--3 {
    top: 18px;
    width: 40px;
  }

  .open nav {
    right: 100px;
    width: 80%;
    padding-top: 2rem;
  }

  nav a {
    margin-left: 5rem;
    font-size: 1rem;
  }

  nav li {
    padding-bottom: 1rem;
    padding-top: 1rem;
  }

  li.has-menu .sub-menu {
    left: 0rem;
  }

  .sub-menu li {
    padding-top: 1rem;
  }

  .font_policy {
    margin-left: 5rem;
  }

  .font_align {
    padding-left: 80px;
  }

  .environment {
    width: 65%;
    margin-left: 4rem;
    margin-top: auto;
  }

  .title-name {
    font-size: 1.2rem;
    padding-left: 4rem;
    bottom: -2rem;
  }

  .title-sub {
    font-size: 1rem;
    padding-left: 4rem;
    margin-top: auto;
    width: 67%;
  }

  .img {
    margin-top: -110px;
  }

  .background {
    width: 70px;
    height: 70px;
    left: 11rem;
    top: 15rem;
  }

  .circle {
    width: 130px;
    height: 130px;
    left: 9.5rem;
    bottom: -8rem;
  }

  .water {
    margin-left: -10rem;
    margin-top: 20rem;
  }

  .water_img {
    width: 150px;
  }

  .work-content_ttl {
    font-size: 1.5rem;
  }

  .about-company {
    font-size: 1rem;
  }

  .work-facility {
    font-size: 1rem;
    margin-left: 0;
  }

  dl {
    display: block;
  }

  dt {
    margin-left: 2rem;
  }

  .work-gas {
    font-size: 1rem;
    margin-left: 0;
  }

  .work-introduce_ttl {
    font-size: 1.5rem;
  }

  .facility {
    font-size: 1.2rem;
  }

  .factory {
    font-size: 1rem;
  }

  .factory-txt {
    font-size: 1rem;
  }

  .facility-img {
    display: block;
  }

  .work_img {
    width: 250px;
  }

  .facility-sistem_txt {
    font-size: 0.8rem;
  }

  .facility-check {
    margin-left: 60px;
  }

  .facility-check_txt {
    font-size: 0.8rem;
  }

  .facility-cover {
    margin-left: 60px;
  }

  .facility-cover_txt {
    font-size: 0.8rem;
  }

  .recruit-information {
    font-size: 1.5rem;
  }

  .date {
    font-size: 1.2rem;
  }

  table {
    margin-left: 4%;
    font-size: 1rem;
    width: 94%;
  }

  th {
    padding: 0.5rem;
  }

  td {
    padding-left: 5px;
  }

  .engineer {
    width: 25%;
  }

  .recruitment_closed-message {
    font-size: 0.7rem;
    padding: 0 15px;
    margin-top: 100%;
    left: 15%;
    border-radius: 48%;
  }

  .contact-btn {
    border-radius: 5px;
    left: 25%;
    font-size: 0.9rem;
    padding: 10px;
  }

  .page-top_btn {
    font-size: 0.8rem;
    bottom: 315px;
    padding: 5px 10px 0px 10px;
  }

  #footer {
    margin-top: 8rem;
    width: 100%;
  }

  .footer-nav {
    position: relative;
    left: 0rem;
    display: block;
    height: auto;
    padding-top: 1rem;
  }

  .footer-nav li {
    padding-top: 1rem;
    padding-bottom: 0;
  }

  .footer-font {
    font-size: 0.8rem;
  }

  li.footer-has_menu .footer-sub_menu {
    left: 0;
  }

  .footer-sub_menu .footer-order {
    padding-top: 0;
  }

  .footer-font_policy {
    left: 0;
    padding: 0;
    font-size: 0.8rem;
  }

  small {
    padding-top: 5rem;
  }
}