:root {
  --paper: #faf9f5;
  --ink: #14140f;
  --ink-soft: #4a4a42;
  --line: #d9d7cd;
  --mint: #1de394;
  --moss: #0ca568;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { background: var(--paper); }
body {
  color: var(--ink);
  font-family: "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", Arial, sans-serif;
  font-feature-settings: "palt";
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}
.decowrap {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 600px;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
a { color: inherit; text-decoration: none; }

.deco {
  position: absolute;
  top: -230px; right: -190px;
  width: 360px; height: 360px;
}

.top, main, .foot {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.top { padding-top: 22px; }
.top a { font-size: 14px; font-weight: 700; letter-spacing: .12em; }
.top a span { display: block; font-size: 10px; font-weight: 400; letter-spacing: .16em; color: var(--ink-soft); }

main { flex: 1; padding-top: 72px; padding-bottom: 40px; }

.head { text-align: right; }
.label { font-size: 13px; font-weight: 700; letter-spacing: .2em; color: var(--moss); }
h1 {
  margin-top: 10px;
  font-size: clamp(40px, 11vw, 76px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: .01em;
}
.en { margin-top: 10px; font-size: 13px; letter-spacing: .1em; color: var(--ink-soft); }
.catch {
  margin-top: 28px;
  font-size: clamp(19px, 5.2vw, 26px);
  font-weight: 700;
  line-height: 1.6;
}

.join {
  margin-top: 56px;
  background: var(--ink);
  color: #fff;
  padding: 28px 22px 30px;
}
.tag {
  display: inline-block;
  font-size: 12px; font-weight: 700; letter-spacing: .2em;
  color: var(--ink); background: var(--mint);
  padding: 2px 10px;
}
.msg { margin-top: 16px; font-size: clamp(18px, 4.8vw, 22px); font-weight: 700; line-height: 1.6; }
.sub { margin-top: 10px; font-size: 15px; line-height: 1.8; color: rgba(255,255,255,.82); }

.reg { margin-top: 24px; }
.btn {
  display: block;
  text-align: center;
  background: var(--mint);
  color: var(--ink);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .12em;
  padding: 16px 20px;
  border-radius: 999px;
}
.btn::after { content: "  →"; }
.btn:active { opacity: .85; }
.btn.sec {
  margin-top: 14px;
  background: transparent;
  color: #fff;
  border: 2px solid var(--mint);
  font-size: 17px;
  padding: 13px 20px;
}
.sub2 { margin-top: 26px; font-size: 15px; line-height: 1.8; color: rgba(255,255,255,.82); }
.contact {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,.22);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255,255,255,.82);
}
.contact a { color: var(--mint); border-bottom: 1px solid var(--mint); white-space: nowrap; }
.soon {
  font-size: 16px; font-weight: 700;
  border: 2px dashed var(--mint);
  padding: 12px 16px;
  text-align: center;
}
.more {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  color: var(--mint);
  border-bottom: 1px solid var(--mint);
  line-height: 1.5;
}

.foot { padding-top: 20px; padding-bottom: 28px; border-top: 1px solid var(--line); font-size: 12px; color: var(--ink-soft); }
.foot a span { margin-left: 12px; }

@media (min-width: 720px) {
  .deco { top: -330px; right: -200px; width: 500px; height: 500px; }
  main { padding-top: 150px; }
  .join { padding: 40px 44px 44px; }
  .btn { display: inline-block; min-width: 320px; }
}