:root {
  color-scheme: light;
  --background: #fafbf8;
  --text: #31433a;
  --muted: #5d6c62;
  --green: #305b43;
  --line: #dce3d9;
  --notice: #eff3eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  font-size: 1rem;
  line-height: 1.9;
  overflow-wrap: anywhere;
  -webkit-text-size-adjust: 100%;
}

p,
h1,
h2 {
  margin: 0;
}

.site-header,
.site-footer {
  width: min(100% - 64px, 1040px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 25px;
  border-bottom: 1px solid var(--line);
}

.site-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.brand-mark {
  width: 13px;
  height: 13px;
  border: 1px solid var(--green);
  border-radius: 2px 7px 2px 2px;
}

.project-label {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

main {
  width: min(100% - 48px, 760px);
  margin-inline: auto;
}

.introduction {
  padding-block: 60px 42px;
  text-align: center;
}

.seed {
  display: flex;
  justify-content: center;
  align-items: end;
  gap: 4px;
  height: 38px;
  margin-bottom: 26px;
}

.seed span {
  width: 23px;
  height: 35px;
  background: #c7d4ba;
  border-radius: 3px 24px 3px 24px;
  transform: rotate(-14deg);
}

.seed span + span {
  height: 28px;
  background: #7c9575;
  border-radius: 24px 3px 24px 3px;
  transform: rotate(14deg);
}

h1 {
  color: var(--green);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, serif;
  font-size: clamp(1.75rem, 4.7vw, 3rem);
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.65;
}

h1 span {
  display: block;
}

.lead {
  margin-top: 28px;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.035em;
}

.description {
  margin-top: 18px;
  color: var(--muted);
  line-height: 2.1;
}

.description p + p {
  margin-top: 12px;
}

.notice {
  padding: 23px 28px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--notice);
  text-align: center;
}

.notice h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--green);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.notice-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
}

.notice p {
  margin-top: 6px;
  font-size: 0.9375rem;
}

.site-footer {
  margin-top: 48px;
  padding-block: 22px 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
}

@media (max-width: 600px) {
  .site-header,
  .site-footer {
    width: calc(100% - 40px);
  }

  .site-header {
    padding-block: 19px;
    gap: 6px 12px;
  }

  .site-name {
    font-size: 0.8125rem;
    gap: 8px;
  }

  .project-label {
    font-size: 0.6875rem;
    letter-spacing: 0.03em;
  }

  .introduction {
    padding-block: 44px 32px;
  }

  h1 {
    letter-spacing: 0.02em;
  }

  .lead {
    margin-top: 24px;
    font-size: 1rem;
    word-break: keep-all;
    overflow-wrap: anywhere;
  }

  .description {
    margin-top: 18px;
    font-size: 0.9375rem;
    text-align: left;
  }

  .description p + p {
    margin-top: 14px;
  }

  .desktop-break {
    display: none;
  }

  .notice {
    padding: 20px;
  }

  .notice p {
    text-align: left;
  }

  .site-footer {
    margin-top: 32px;
    padding-block: 19px 24px;
    font-size: 0.6875rem;
  }
}