:root {
  --washi: #f6f1e7;
  --washi-deep: #ece4d4;
  --sumi: #231f1c;
  --sumi-muted: #6f655a;
  --shu: #c0392b;
  --shu-ink: #96281c;
  --line: #ddd2bf;
  --brush: "Yuji Syuku", "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--washi);
  color: var(--sumi);
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  font-weight: 500;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  font-family: var(--brush);
  font-weight: 400;
}

/* 朱の丸印（ブランドの印）。中の字は筆文字 */
.seal {
  display: inline-grid;
  place-items: center;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--shu);
  color: var(--washi);
  font-family: var(--brush);
  font-size: 52px;
  line-height: 1;
  box-shadow: inset 0 0 0 4px var(--shu), inset 0 0 0 6px rgba(246, 241, 231, 0.8);
}

/* hero */
.hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 64px 16px 72px;
  text-align: center;
}

.name {
  margin: 24px 0 0;
  font-size: clamp(48px, 13vw, 88px);
  line-height: 1.2;
  letter-spacing: 0.04em;
}

.name-en {
  margin: 0;
  color: var(--shu);
  font-size: 14px;
  letter-spacing: 0.2em;
}

.catch {
  margin: 20px 0 0;
  font-size: clamp(20px, 5vw, 28px);
  font-weight: 700;
  line-height: 1.7;
}

.catch span,
.closing-copy span {
  display: inline-block;
}

.catch em {
  font-style: normal;
  color: var(--shu);
}

.sub {
  max-width: 30em;
  margin: 16px auto 0;
  color: var(--sumi-muted);
  font-size: 16px;
}

.store-soon {
  display: inline-block;
  margin-top: 32px;
  padding: 10px 24px;
  border: 1px solid var(--sumi);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
}

.store-soon small {
  display: block;
  color: var(--sumi-muted);
  font-size: 12px;
  font-weight: 500;
}

/* features */
.features {
  background: var(--washi-deep);
  padding: 72px 16px;
}

.features > h2,
.closing-copy {
  margin: 0 auto;
  text-align: center;
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.6;
}

.feature-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  max-width: 960px;
  margin: 48px auto 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 4px 16px;
  align-items: start;
}

.feature-list .mark {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border: 2px solid var(--shu);
  border-radius: 50%;
  color: var(--shu);
  font-family: var(--brush);
  font-size: 30px;
  line-height: 1;
}

.feature-list .mark.square {
  border-radius: 8px;
}

.feature-list .mark.filled {
  background: var(--shu);
  color: var(--washi);
}

.feature-list h3 {
  margin: 4px 0 0;
  font-size: 24px;
  line-height: 1.5;
}

.feature-list p {
  margin: 0;
  color: var(--sumi-muted);
  font-size: 15px;
}

/* howto（記録の流れ） */
.howto {
  max-width: 720px;
  margin: 0 auto;
  padding: 72px 16px;
  text-align: center;
}

.howto h2 {
  margin: 0;
  font-size: clamp(24px, 6vw, 32px);
}

.steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 8px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  font-size: 17px;
  font-weight: 700;
}

.steps li {
  padding: 6px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fffdf8;
}

.steps li.last {
  border-color: var(--shu);
  background: var(--shu);
  color: var(--washi);
  font-family: var(--brush);
  font-weight: 400;
}

.howto p {
  margin: 24px 0 0;
  color: var(--sumi-muted);
  font-size: 15px;
}

/* promise */
.promise {
  padding: 64px 16px;
  text-align: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.promise p {
  margin: 0;
  font-size: clamp(20px, 5vw, 26px);
  font-weight: 700;
}

.promise small {
  display: block;
  max-width: 32em;
  margin: 8px auto 0;
  color: var(--sumi-muted);
  font-size: 14px;
}

/* closing */
.closing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 72px 16px 80px;
}

.closing .seal {
  width: 72px;
  height: 72px;
  font-size: 38px;
}

/* ページ上部の小さな印と名前（法務・サポート・404） */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--sumi);
  font-family: var(--brush);
  font-size: 22px;
  text-decoration: none;
}

.brand .seal {
  width: 44px;
  height: 44px;
  font-size: 24px;
  box-shadow: inset 0 0 0 2px var(--shu), inset 0 0 0 3px rgba(246, 241, 231, 0.8);
}

.legal-header {
  padding: 32px 16px 0;
  text-align: center;
}

/* legal（利用規約・プライバシーポリシー） */
.legal {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 16px 80px;
  font-size: 15px;
}

.legal h1 {
  margin: 0;
  text-align: center;
  font-size: clamp(28px, 7vw, 36px);
}

.legal .dates {
  margin: 8px 0 40px;
  text-align: center;
  color: var(--sumi-muted);
  font-size: 13px;
}

.legal h2 {
  margin: 40px 0 8px;
  padding-left: 12px;
  border-left: 4px solid var(--shu);
  font-size: 20px;
  line-height: 1.5;
}

.legal ul,
.legal ol {
  padding-left: 1.3em;
}

.legal li + li {
  margin-top: 8px;
}

.legal a {
  color: var(--shu-ink);
}

/* support（よくある質問） */
.faq dt {
  margin-top: 24px;
  font-weight: 700;
}

.faq dt::before {
  content: "問";
  display: inline-grid;
  place-items: center;
  width: 1.6em;
  height: 1.6em;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--shu);
  color: var(--washi);
  font-family: var(--brush);
  font-size: 14px;
  font-weight: 400;
  vertical-align: 0.1em;
}

.faq dd {
  margin: 4px 0 0;
  padding-left: calc(1.6em + 8px);
}

.contact {
  margin-top: 16px;
  padding: 24px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fffdf8;
  text-align: center;
}

.contact .mail {
  margin: 8px 0 0;
  font-size: clamp(18px, 5vw, 22px);
  font-weight: 700;
}

.contact .owner {
  margin: 12px 0 0;
  color: var(--sumi-muted);
  font-size: 13px;
}

/* 404 */
.not-found {
  max-width: 560px;
  min-height: calc(100vh - 160px);
  margin: 0 auto;
  padding: 80px 16px;
  text-align: center;
}

.not-found .seal {
  background: #8a8178;
  box-shadow: inset 0 0 0 4px #8a8178, inset 0 0 0 6px rgba(246, 241, 231, 0.8);
}

.not-found h1 {
  margin: 32px 0 8px;
  font-size: clamp(26px, 7vw, 34px);
}

.not-found a {
  color: var(--shu-ink);
}

/* footer */
.footer {
  padding: 32px 16px 40px;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--sumi-muted);
  font-size: 13px;
}

.footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-bottom: 12px;
}

.footer a {
  color: var(--sumi-muted);
}

.footer small {
  display: block;
}

.footer .attribution {
  margin-top: 4px;
}

@media (min-width: 820px) {
  .hero {
    padding: 104px 32px 96px;
  }

  .feature-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 56px 48px;
  }
}