:root {
  --text: #a2837f;
  --bg: #ffffff;
  --gold: #bfa37e;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Zen Kaku Gothic New', 'Hiragino Maru Gothic ProN', 'Hiragino Maru Gothic Pro', 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;
  overflow-x: hidden;
}

header {
  padding: 2rem 4rem;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.logo {
  font-size: 1.8rem;
  letter-spacing: 0.2em;
  color: var(--text);
  text-decoration: none;
}
.back-link {
  text-decoration: none;
  color: var(--text);
  letter-spacing: 0.1em;
  font-size: 0.9rem;
}
.back-link:hover { opacity: 0.6; }

.page-header {
  text-align: center;
  padding: 4rem 0 3rem;
}
.page-title {
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 0.18em;
  margin: 0;
  color: var(--text);
}
.page-sub {
  display: block;
  margin-top: 1rem;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--text);
}

.form-wrap {
  max-width: 1000px;
  margin: 0 auto 6rem;
  padding: 0 2rem;
}
.contact-iframe {
  width: 100%;
  min-height: 80vh;
  border: none;
  background: #fff;
  box-shadow: 0 10px 30px rgba(0,0,0,0.04);
}

@media (max-width: 768px) {
  header { padding: 1.5rem; }
  .page-title { font-size: 1.6rem; }
  .form-wrap { padding: 0 1.5rem; }
  .contact-iframe { min-height: 75vh; }
}