:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #1a1f28;
  --muted: #5d6674;
  --line: #e3e8ef;
  --line-strong: #ccd4df;
  --heading: #111827;
  --accent: #0f5f9c;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
}

body {
  color: var(--text);
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.9;
}

.page {
  min-height: 100dvh;
  padding: clamp(16px, 3.2vw, 40px);
  display: grid;
  place-items: start center;
}

.lang-switch {
  width: min(940px, 100%);
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.lang-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 6rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.lang-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.lang-link.is-active {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
}

.terms-card {
  width: min(940px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(20px, 4vw, 48px);
}

.terms-header {
  margin-bottom: 1.25rem;
  padding-bottom: 0.9rem;
  border-bottom: 2px solid var(--line-strong);
}

h1 {
  margin: 2rem auto;
  color: var(--heading);
  font-size: clamp(1.5rem, 2vw, 2rem);
  line-height: 1.35;
  letter-spacing: 0.04em;
  text-align: center;
}

.updated {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: right;
}

p {
  margin: 0;
  font-size: clamp(14px, 1.25vw, 16px);
}

p + p {
  margin-top: 0.7rem;
}

.clause {
  margin-top: 1.55rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--line);
}

.clause h2 {
  margin: 0 0 0.7rem;
  color: var(--heading);
  font-size: clamp(1.02rem, 1.4vw, 1.2rem);
  line-height: 1.55;
  letter-spacing: 0.015em;
}

.num-list {
  margin: 0.55rem 0 0;
  padding-left: 1.45rem;
}

.num-list li {
  margin: 0;
}

.num-list li + li {
  margin-top: 0.5rem;
}

.clause:last-child p:last-child {
  text-align: right;
  margin-top: 1rem;
  color: var(--muted);
}

footer {
  margin-top: 2.5rem;
  margin-bottom: 2.5rem;
  padding-top: 1.25rem;
  font-size: 0.7rem;
  text-align: center;
}

@media (max-width: 720px) {
  .lang-switch {
    margin-bottom: 0.6rem;
  }

  .lang-link {
    min-width: 5.3rem;
    padding: 0.32rem 0.65rem;
    font-size: 0.8rem;
  }

  .terms-card {
    border-radius: 10px;
    padding: 18px 14px 24px;
  }

  .clause {
    margin-top: 1.25rem;
    padding-top: 0.95rem;
  }

  .num-list {
    padding-left: 1.25rem;
  }
}