html {
  scroll-behavior: smooth;
}

body {
  font-family: "Oswald", "Noto Sans JP", sans-serif;
  color: #82D0D9;
}
body.is-fixed {
  overflow: hidden;
}

.button__text {
  font-size: 22px;
  letter-spacing: 1px;
}

.header {
  background-color: #F2DABD;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10;
}
.header__logo {
  width: 150px;
  padding: 15px;
  font-size: 20px;
}
.header__menu-btn {
  border: none;
  position: absolute;
  top: 26px;
  right: 30px;
  width: 30px;
  height: 36px;
  color: transparent;
  overflow: hidden;
  background: url(../img/bg_menu.png) center center;
  background-size: cover;
}
.header__menu-btn.is-checked {
  background-image: url(../img/bg_menu-close.png);
}
.header__contents {
  border-top: 1px solid #82D0D9;
  height: calc(100vh - 90px);
  padding-top: 30px;
  display: none;
}
.header__nav-list {
  text-align: center;
}
.header__nav-item {
  width: 150px;
  margin: 30px auto;
}

.fv {
  font-family: "Dancing Script", cursive;
  position: relative;
}
.fv__img__pc {
  width: 100%;
}
.fv__contents {
  position: absolute;
  top: 40%;
  left: 18%;
}
.fv__contents__main {
  display: block;
  font-size: 50px;
  letter-spacing: 0.05em;
}
.fv__contents__sub {
  display: block;
  font-size: 30px;
  letter-spacing: 0.05em;
  margin-top: 15px;
  line-height: 22px;
}

.section__inner {
  padding: 50px 28px;
}
.section__heading {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
}
.section__heading-main {
  font-size: 40px;
  letter-spacing: 0.1em;
}
.section__heading-sub {
  font-size: 12px;
}
.section__lead-text {
  margin-top: 30px;
}

.service {
  background-color: #fafafa;
}
.service__list {
  text-align: center;
  padding-top: 46px;
}
.service__item + .service__item {
  margin-top: 46px;
}
.service__item-title {
  font-size: 14px;
  font-weight: bold;
  margin: 10px 0;
}
.service__item-text {
  font-size: 14px;
  line-height: 24px;
}

.works__list {
  padding-top: 40px;
}
.works__item + .works__item {
  margin-top: 40px;
}
.works__item-img img {
  -webkit-box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.5);
          box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.5);
}
.works__item-title {
  font-weight: bold;
  margin: 10px 0 5px 0px;
}
.works__item-link {
  font-size: 13px;
  text-decoration: underline;
}

.about {
  background-color: #fafafa;
}
.about__img {
  margin-bottom: 40px;
  opacity: 0.7;
}

.workflow__img {
  display: block;
  margin-top: 50px;
  text-align: center;
}

.message {
  background-color: #fafafa;
}
.message__img {
  margin-bottom: 40px;
  opacity: 0.7;
}

.btn-section__wrapper {
  color: #65B6BF;
  text-align: center;
}
.btn-section__contact {
  padding: 40px 0;
}
.btn-section__icon-contact {
  width: 170px;
  margin: 40px auto 0 auto;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  padding-left: 0;
}
.btn-section__text {
  padding-top: 10px;
  font-size: 13px;
}
.btn-section__twitter {
  padding: 40px 0;
}
.btn-section__icon-twitter {
  width: 170px;
  margin: 40px auto 0 auto;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  padding-left: 0;
}

.contact {
  text-align: center;
  margin-top: 80px;
}

.flex-box {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  width: 220px;
  margin: 0 auto 10px auto;
}

.box {
  margin: 70px auto;
}
.box__name {
  display: block;
  margin-bottom: 10px;
}
.box__input {
  display: block;
  border: none;
  width: 90%;
  border-radius: 10px;
  padding: 10px;
  margin: 0 auto;
  background-color: #fafafa;
  font-family: "Noto Sans JP", sans-serif;
}

.contact__contents__item-btn {
  width: 15px;
  margin-right: 10px;
}

.contact__contents__item-text {
  width: 70%;
  text-align: left;
}

.submit-btn {
  font-family: "Noto Sans JP", sans-serif;
  background-color: #65B6BF;
  border: none;
  color: white;
  padding: 10px 60px;
  border-radius: 5px;
  opacity: 0.7;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}
.submit-btn:hover {
  cursor: pointer;
  opacity: 1;
}

.end-message {
  display: none;
}

.false-message {
  display: none;
}

.footer {
  padding: 10px 0;
  text-align: center;
  font-family: serif;
  font-size: 13px;
}

@media screen and (min-width: 768px) {
  .wrapper {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
  }
  .header {
    position: relative;
    -ms-flex-preferred-size: 20%;
        flex-basis: 20%;
    padding: 60px 20px;
  }
  .header__container {
    position: sticky;
    top: 60px;
    margin: 0 auto;
  }
  .header__menu-btn {
    display: none;
  }
  .header__contents {
    display: block;
    border: none;
  }
  .header__logo {
    padding: 0;
    margin: 0 auto;
    font-size: 28px;
    letter-spacing: 0.04em;
  }
  .header__nav-item {
    -webkit-transition: all 300ms;
    transition: all 300ms;
  }
  .header__nav-item:hover {
    color: white;
    opacity: 0.9;
  }
  .main {
    -ms-flex-preferred-size: 80%;
        flex-basis: 80%;
  }
  .fv__img__pc {
    height: 70vh;
  }
  .fv__contents {
    top: 10%;
    left: 25%;
  }
  .fv__contents__main {
    font-size: 7vw;
  }
  .section__inner {
    max-width: 980px;
    margin: 0 auto;
  }
  .section__heading-main {
    font-size: 60px;
  }
  .concept__container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 40px;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
        -ms-flex-direction: row-reverse;
            flex-direction: row-reverse;
  }
  .concept__img {
    display: block;
    margin: 40px 0 0 0;
    opacity: 0.6;
  }
  .service__list {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 74px;
  }
  .service__item + .service__item {
    margin-top: 0;
  }
  .service__item-text {
    text-align: left;
  }
  .works__list {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 74px;
  }
  .works__item + .works__item {
    margin-top: 0;
  }
  .about__container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 40px;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
        -ms-flex-direction: row-reverse;
            flex-direction: row-reverse;
  }
  .about__img {
    margin: 40px 0 0 0;
  }
  .message__container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 40px;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
        -ms-flex-direction: row-reverse;
            flex-direction: row-reverse;
  }
  .box {
    width: 600px;
  }
  .box__input {
    width: 500px;
  }
  .btn-section__wrapper {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
  }
  .btn-section__contact {
    -ms-flex-preferred-size: 50%;
        flex-basis: 50%;
    -webkit-transition: all 300ms;
    transition: all 300ms;
  }
  .btn-section__contact:hover {
    background-color: #65B6BF;
    color: #fff;
    opacity: 0.7;
  }
  .btn-section__twitter {
    -ms-flex-preferred-size: 50%;
        flex-basis: 50%;
    -webkit-transition: all 300ms;
    transition: all 300ms;
  }
  .btn-section__twitter:hover {
    background-color: #65B6BF;
    color: #fff;
    opacity: 0.7;
  }
  .btn-section__icon-contact:hover .btn-section__icon-path--contact {
    fill: #4a4a4a;
  }
  .btn-section__icon-twitter:hover .btn-section__icon-path--twitter {
    fill: #4a4a4a;
  }
}