.join-chapitour {
  min-height: 100vh;
  padding: 24px;
  display: grid;
  place-items: center;
  background: #000;
}

.join-chapitour__box {
  width: min(100%, 720px);
  padding: clamp(36px, 6vw, 72px);
  text-align: center;
  border-radius: 5px;
  background: #ffffff;
  box-shadow: 0 24px 70px rgba(54, 28, 68, 0.12);
}

.join-chapitour span {
  display: inline-block;
  margin-bottom: 18px;
  color: #76468f;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.join-chapitour h1 {
  margin: 0;
  color: #24172d;
  line-height: 1.05;
  font-weight: 700;
}

.join-chapitour p {
  max-width: 580px;
  margin: 20px auto 0;
  color: #655b6b;
  line-height: 1.75;
}

.join-chapitour strong {
  color: #24172d;
}

.join-chapitour a {
  display: inline-flex;
  margin-top: 34px;
  padding: 14px 24px;
  border-radius: 5px;
  background: #76468f;
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.25s ease, background 0.25s ease;
}

.join-chapitour a:hover {
  transform: translateY(-3px);
  background: #603578;
}

@media (max-width: 640px) {
  .join-chapitour {
    padding: 16px;
  }

  .join-chapitour__box {
    padding: 34px 22px;
    border-radius: 22px;
  }

  .join-chapitour a {
    width: 100%;
    justify-content: center;
  }
}