:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  color: #20262b;
  background: #faf9f6;
  line-height: 1.9;
}

a {
  color: inherit;
}

.memo-page {
  width: min(760px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 38px 0 64px;
}

.memo-nav {
  margin-bottom: 56px;
}

.memo-back-link {
  color: #53616b;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.memo-back-link:hover {
  color: #111;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.memo-header {
  margin-bottom: 64px;
}

.memo-header h1 {
  margin: 0;
  color: #171b1f;
  font-size: clamp(32px, 6vw, 46px);
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: 1.25;
}

.memo-header p {
  max-width: 650px;
  margin: 16px 0 0;
  color: #667078;
  font-size: 14px;
  line-height: 1.85;
}

.memo-entry {
  padding-top: 38px;
  border-top: 1px solid #d9d7d1;
}

.memo-entry-header {
  margin-bottom: 34px;
}

.memo-date {
  margin: 0 0 10px;
  color: #7a8288;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
}

.memo-entry h2 {
  margin: 0;
  color: #171b1f;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.45;
}

.memo-entry h3 {
  margin: 48px 0 0;
  color: #20262b;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.55;
}

.memo-entry p {
  margin: 20px 0 0;
  color: #30373d;
  font-size: 15px;
  font-weight: 450;
  line-height: 2;
}

.memo-entry ul {
  margin: 20px 0 0;
  padding-left: 1.4em;
}

.memo-entry li {
  margin-top: 8px;
  color: #30373d;
  font-size: 15px;
  line-height: 1.85;
}

.memo-entry-note {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #e2e0da;
}

.memo-entry-note strong {
  font-size: 14px;
}

.memo-entry-note p {
  margin-top: 8px;
  color: #4d565d;
  font-size: 14px;
}

.memo-footer {
  margin-top: 72px;
  padding-top: 24px;
  color: #7a8288;
  border-top: 1px solid #d9d7d1;
  font-size: 11px;
  line-height: 1.7;
}

.memo-footer p {
  margin: 4px 0 0;
}

@media (max-width: 640px) {
  .memo-page {
    width: min(100% - 32px, 760px);
    padding-top: 24px;
  }

  .memo-nav {
    margin-bottom: 40px;
  }

  .memo-header {
    margin-bottom: 48px;
  }

  .memo-entry {
    padding-top: 30px;
  }

  .memo-entry h3 {
    margin-top: 38px;
    font-size: 18px;
  }

  .memo-entry p,
  .memo-entry li {
    font-size: 14px;
  }
}