body {
  margin: 0;
  padding: 0;
  background: #111827;
  color: #E5E7EB;
  font-family: "Noto Sans JP", sans-serif;
}

/* 左上戻るボタン */
.back-btn {
  position: fixed;
  top: 16px;
  left: 16px;
  padding: 10px 16px;
  font-size: 16px;
  font-weight: bold;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 8px;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.3);
  text-decoration: none;
  transition: 0.25s;
  z-index: 1000;
}

.back-btn:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-3px);
}

/* 全体コンテナ */
.legal-container {
  max-width: 860px;
  margin: 120px auto 60px;
  padding: 0 20px;
}

/* 見出し */
h1 {
  font-size: 2rem;
  margin-bottom: 10px;
  color: #F3F4F6;
}

.sub {
  opacity: 0.7;
  margin-bottom: 40px;
}

section {
  margin-bottom: 40px;
}

h2 {
  font-size: 1.4rem;
  margin-bottom: 10px;
  border-left: 4px solid #3B82F6;
  padding-left: 12px;
  color: #F3F4F6;
}

p, li {
  line-height: 1.7;
}

a {
  color: #93c5fd;
  text-decoration: underline;
}

a:hover {
  opacity: 0.8;
}