* {
  box-sizing: border-box;
}
html {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 62.5%;
  -webkit-text-size-adjust: 100%;
  color: #2F3E46;
  scroll-behavior: smooth;
}
body {
  font-size: 1.6em;
}
main {
  line-height: 1.6;
}
h2,h3,h4 {
  line-height: 1;
}
img {
  max-width: 100%;
  vertical-align: top;
}
a {
  text-decoration: none;
  color: #111;
  transition: all 0.4s;
}
a:hover {
  opacity: 0.5;
}
li {
  list-style-type: none;
}


/*==== 余白 ====*/
.mt-0 {margin-top: 0 !important;}
.mt-f {margin-top: calc(20px / 2) !important;}
.mt-1 {margin-top: 20px !important;}
.mt-2 {margin-top: calc(20px * 2) !important;}
.mt-3 {margin-top: calc(20px * 3) !important;}

.mr-0 {margin-right: 0 !important;}
.mr-f {margin-right: calc(20px / 2) !important;}
.mr-1 {margin-right: 20px !important;}
.mr-2 {margin-right: calc(20px * 2) !important;}
.mr-3 {margin-right: calc(20px * 3) !important;}

.mb-0 {margin-bottom: 0 !important;}
.mb-f {margin-bottom: calc(20px / 2) !important;}
.mb-1 {margin-bottom: 20px !important;}
.mb-2 {margin-bottom: calc(20px * 2) !important;}
.mb-3 {margin-bottom: calc(20px * 3) !important;}

.ml-0 {margin-left: 0 !important;}
.ml-f {margin-left: calc(20px / 2) !important;}
.ml-1 {margin-left: 20px !important;}
.ml-2 {margin-left: calc(20px * 2) !important;}
.ml-3 {margin-left: calc(20px * 3) !important;}

.pt-0 {padding-top: 0 !important;}
.pt-f {padding-top: calc(20px / 2) !important;}
.pt-1 {padding-top: 20px !important;}
.pt-2 {padding-top: calc(20px * 2) !important;}
.pt-3 {padding-top: calc(20px * 3) !important;}

.pr-0 {padding-right: 0 !important;}
.pr-f {padding-right: calc(20px / 2) !important;}
.pr-1 {padding-right: 20px !important;}
.pr-2 {padding-right: calc(20px * 2) !important;}
.pr-3 {padding-right: calc(20px * 3) !important;}

.pb-0 {padding-bottom: 0 !important;}
.pb-f {padding-bottom: calc(20px / 2) !important;}
.pb-1 {padding-bottom: 20px !important;}
.pb-2 {padding-bottom: calc(20px * 2) !important;}
.pb-3 {padding-bottom: calc(20px * 3) !important;}

.pl-0 {padding-left: 0 !important;}
.pl-f {padding-left: calc(20px / 2) !important;}
.pl-1 {padding-left: 20px !important;}
.pl-2 {padding-left: calc(20px * 2) !important;}
.pl-3 {padding-left: calc(20px * 3) !important;}


/*==== flex & grid ====*/
.flex {
  display: flex;
}
.inline-flex {
  display: inline-flex;
}
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  justify-content: center;
}


/*==== 見出し ====*/
.sec-ttl {
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  line-height: 1;
}
.sec-ttl .en {
  padding-bottom: 10px;
  font-family: "Outfit", sans-serif;
  font-size: 9rem;
  font-weight: 700;
  color: #aed9df;
  letter-spacing: 0.05em;
}
.sec-ttl .jp {
  font-weight: 900;
  font-size: 3rem;
  text-shadow: 2px 2px 2px #fff, -2px -2px 2px #fff, -2px 2px 2px #fff, 2px -2px 2px #fff, 2px 0px 2px #fff, -2px 0px 2px #fff, 0px 2px 2px #fff, 0px -2px 2px #fff;
  letter-spacing: 0.05em;
  line-height: 1.3;
  text-align: center;
}
.sec-ttl .jp span {
  color: #5db3bf;
}
@media (max-width: 767px) {
  .sec-ttl .en {
    font-size: 5rem;
    letter-spacing: 0.025em;
  }
  .sec-ttl .jp {
    font-size: 2.5rem;
    letter-spacing: 0.025em;
  }
}


/*==== header ====*/
header {
  width: 100%;
  background: #fff;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 auto;
  padding: 15px 30px;
}
.header-inner p {
  color: #787878;
  font-size: 1.5rem;
  font-weight: 500;
}
@media (max-width: 810px) {
  .header-inner {
    display: block;
    text-align: center;
  }
  .header-inner p {
    display: none;
  }
}
@media (max-width: 480px) {
  .header-inner h1 img {
    height: 30px;
  }
}


/*==== 固定ボタン ====*/
.foot-btn {
  display: none;
}
@media (max-width: 767px) {
  .top-btn {
    display: none;
  }
	.foot-btn {
    display: block;
		position: sticky;
    bottom: 5px;
    right: 0;
		z-index: 10;
    text-align: center;
	}
  .foot-btn a {
    width: 97%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 20px 60px;
    border-radius: 100px;
    background: linear-gradient(135deg, #FF7F6E, #FFB347);
    position: relative;
    overflow: hidden;
    box-shadow:
      0 10px 20px rgba(255, 127, 110, 0.3), /* 外側の柔らかい影 */
      inset 0 2px 2px rgba(255, 255, 255, 0.5), /* 上部のハイライト */
      inset 0 -2px 10px rgba(0, 0, 0, 0.05); /* 下部のわずかな沈み込み */
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;

    color: #fff;
    font-size: 2.4rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }

  .foot-btn a:hover {
    opacity: 1;
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(255, 127, 110, 0.4);
  }
  .foot-btn a::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
      to right,
      transparent,
      rgba(255, 255, 255, 0.3),
      transparent
    );
    transform: skewX(-25deg);
    transition: 0.8s;
  }
  .foot-btn a:hover::before {
    left: 150%;
  }

  .foot-btn a::after {
    content: "";
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    border-top: 7.5px solid transparent;
    border-bottom: 7.5px solid transparent;
    border-left: 10px solid #fff;
  }
}