html {
  overflow: auto;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

body {
  font-family: "Noto Sans JP", sans-serif;
  box-sizing: border-box;
  line-height: 1.5;
  word-wrap: break-word;
  overflow: hidden;
  font-size: 62.5%;
  letter-spacing: .2em;
}

@media (max-width: 768px) {
  body {
    min-width: 100%;
    width: 100%;
  }
}

img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  border: 0;
  vertical-align: bottom;
}

a {
  text-decoration: none;
  font-family: "Roboto Condensed", "Noto Sans JP", sans-serif;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
  -o-transition: all 0.5s;
}

a:hover {
  opacity: .5;
}

ul {
  list-style: none;
}

.header {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;
  width: 100%;
  height: 60px;
  background-color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.16);
  display: flex;
  justify-content: start;
}

img.item1 {
    min-width: 100%;
}

@media (min-width: 768px) {
  .header {
    justify-content: center;
  }
}

.header__logo--img {
  height: 60px;
}

.header__nav {
  position: fixed;
  right: -320px;
  top: 0;
  width: 300px;
  height: 100vh;
  padding-top: 60px;
  background-color: #fff;
  transition: all .6s;
  z-index: 200;
  overflow-y: auto;
}

.header__nav--list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.header__nav--item {
  text-align: center;
  padding: 0 14px;
}

.header__nav--item a {
  display: block;
  padding: 20px 0;
  border-bottom: 1px solid #eee;
  text-decoration: none;
  color: #111;
}

@media (min-width: 768px) {
    .header__nav--item a {
        font-size: 12px;
    }
}
@media (max-width: 768px) {
    .header__nav--item a {
        padding: 30px 0;
    }
}
.header__nav--item a:hover {
  background-color: #eee;
}

.hamburger {
  position: absolute;
  right: 0;
  top: 0;
  width: 40px;
  height: 60px;
  cursor: pointer;
  z-index: 300;
}

.hamburger__line {
  position: absolute;
  left: 11px;
  width: 26px;
  height: 2px;
  background-color: #111;
  transition: all .6s;
}

.hamburger__line--1 {
  top: 24px;
}

.hamburger__line--2 {
  top: 32px;
}

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

.black-bg {
  position: fixed;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  z-index: 100;
  background-color: #000;
  opacity: 0;
  visibility: hidden;
  transition: all .6s;
  cursor: pointer;
}

.nav-open .header__nav {
  right: 0;
}

.nav-open .black-bg {
  opacity: .8;
  visibility: visible;
}

.nav-open .hamburger__line--1 {
  transform: rotate(45deg);
  top: 30px;
}

.nav-open .hamburger__line--2 {
  width: 0;
  left: 50%;
}

.nav-open .hamburger__line--3 {
  transform: rotate(-45deg);
  top: 30px;
}

.main {
  margin: 60px 0px 40px;
}

.product {
    background-color: #f8f8f8;
    text-align: center;
}

.product_img {
    width: 100%;
    display: flex;
    display: -ms-flexbox; /* IE10 */
    flex-wrap: wrap;
    -ms-flex-wrap: wrap; /* IE10 */
}
    .product_img > div {
        width: 25%;
        padding: 10px;
    }


img.products {
    width:10%;
}

@media (max-width: 768px) {
    img.products {
        width: 15%;
    }
}

@media (max-width: 414px) {
    img.products {
        width: 30%;
    }
}

@media (max-width: 768px) {
    .product_img > div {
        width: 50%;
    }
}


img.product1 {
    width: 50%;
}

.container {
    text-align: center;
    margin: 0 auto;
    background-color: #f8f8f8;
}

.square_btn {
    display: block;
    position: relative;
    width: 160px;
    padding: 0.8em;
    text-align: center;
    text-decoration: none;
    color: #1B1B1B;
    background: #fff;
    border: 1px solid #1B1B1B;
    margin: 0 auto;
}

    .square_btn:hover {
        background: #1B1B1B;
        color: #fff;
        cursor: pointer;
        text-decoration: none;
    }

.footer__nav--list {
    display: flex;
    flex-wrap: wrap;
    border-top: 1px solid #888;
}

.footer__nav--item {
  position: relative;
  width: 50%;
  border-bottom: 1px solid #888;
}

@media (min-width: 768px) {
  .footer__nav--item {
    width: 20%;
    border-right: 1px solid #888;
  }
}

.footer__nav--item:nth-child(odd) {
  border-right: 1px solid #888;
}

.footer__nav--item a {
  padding: 12px 0 12px 10px;
  display: block;
  color: #333;
}

.footer__nav--item--icon {
  position: absolute;
  right: 5%;
}

.footer__nav--item--icon::before {
  content: '';
  display: inline-block;
  left: 3px;
  width: 6px;
  height: 6px;
  border-top: 1px solid #888;
  border-right: 1px solid #888;
  -webkit-transform: rotate(45deg);
  transform: rotate(45deg);
}