:root {
  color-scheme: light;
  --lp-paper: #ffffff;
  --lp-ink: #1f2937;
  --lp-border: #d1d5db;
  font-family:
    "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif CJK JP", serif;
  color: var(--lp-ink);
  background: var(--lp-paper);
  font-synthesis: none;
  line-height: 2;
  overflow-wrap: anywhere;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --lp-paper: #18181b;
    --lp-ink: #e4e4e7;
    --lp-border: #52525b;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-width: 0;
}

a {
  color: inherit;
  text-underline-offset: 0.35em;
}

a:focus-visible {
  outline: 2px solid var(--lp-ink);
  outline-offset: 6px;
}

.landing {
  width: min(100% - 96px, 1040px);
  margin-inline: auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  column-gap: 64px;
  min-height: 760px;
  min-height: min(900px, 100svh);
  padding-block: 96px 120px;
  border-bottom: 1px solid var(--lp-border);
}

.eyebrow,
.author,
.hero-index,
.colophon {
  font-size: 0.875rem;
  letter-spacing: 0.16em;
}

.eyebrow {
  margin-bottom: 24px;
}

h1 {
  font-size: clamp(2rem, 4.4vw, 3.25rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.6;
}

.author {
  margin-top: 24px;
}

.read-link {
  display: inline-flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  min-height: 52px;
  margin-top: 48px;
  padding: 12px 28px;
  border: 1px solid var(--lp-ink);
  background: var(--lp-ink);
  color: var(--lp-paper);
  font-size: 0.9375rem;
  letter-spacing: 0.12em;
  text-decoration: none;
}

.purchase-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: fit-content;
  max-width: 100%;
  min-height: 52px;
  margin-top: 16px;
  padding: 12px 20px;
  border: 1px solid var(--lp-border);
  color: var(--lp-ink);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.purchase-link[aria-disabled="true"] {
  cursor: default;
}

.purchase-status {
  flex-shrink: 0;
  padding: 2px 8px;
  border: 1px solid var(--lp-border);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
}

@media (hover: hover) {
  .read-link:hover {
    color: var(--lp-ink);
    background: var(--lp-paper);
  }
}

.key-phrase {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  height: 40em;
  font-size: 1rem;
  line-height: 2.6;
  letter-spacing: 0.12em;
}

.key-phrase p:first-child {
  margin-left: 24px;
  font-size: 1.25rem;
}

.hero-index {
  position: absolute;
  bottom: 32px;
  left: 0;
  text-decoration: none;
}

.hero-index span {
  margin-left: 24px;
}

.section {
  padding-block: 96px;
  border-bottom: 1px solid var(--lp-border);
}

.section-number {
  margin-bottom: 12px;
  font-size: 0.875rem;
}

h2 {
  margin-bottom: 48px;
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  font-weight: 500;
  letter-spacing: 0.14em;
  line-height: 1.6;
}

h3 {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.8;
}

.story-copy {
  max-width: 720px;
  margin-inline: auto;
}

.story-copy p + p {
  margin-top: 24px;
}

.sides {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 720px;
  margin: 48px auto 0;
  padding-block: 24px;
  border-block: 1px solid var(--lp-border);
  text-align: center;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
}

.sides p + p {
  border-left: 1px solid var(--lp-border);
}

.sides span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.75rem;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px;
  list-style: none;
  counter-reset: feature;
}

.features li {
  counter-increment: feature;
}

.features li::before {
  content: "0" counter(feature);
  display: block;
  margin-bottom: 24px;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
}

.features h3 {
  margin-bottom: 20px;
}

.features p,
.persons-desc {
  font-size: 0.9375rem;
  line-height: 2.1;
}

.persons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 64px;
}

.persons-item {
  display: flex;
  flex-direction: column;
  padding-block: 32px;
  border-top: 1px solid var(--lp-border);
}

.persons-name {
  margin-bottom: 20px;
  font-size: 1.375rem;
}

.persons-desc {
  margin-bottom: 28px;
}

.persons-phrase {
  margin-top: auto;
  font-size: 1rem;
  line-height: 2;
}

.closing {
  padding-block: 96px 32px;
  text-align: center;
}

.closing > p:first-child {
  font-size: clamp(1rem, 2vw, 1.375rem);
  letter-spacing: 0.1em;
}

.colophon {
  margin-top: 96px;
  font-size: 0.75rem;
}

@media (max-width: 800px) {
  .landing {
    width: calc(100% - 48px);
  }

  .hero {
    column-gap: 24px;
  }

  h1 {
    font-size: 1.875rem;
    letter-spacing: 0.06em;
  }

  .key-phrase {
    font-size: 0.875rem;
    line-height: 2.2;
  }

  .key-phrase p:first-child {
    font-size: 1.125rem;
    margin-left: 16px;
  }

  .features {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .features li {
    padding-top: 24px;
    border-top: 1px solid var(--lp-border);
  }

  .features li::before {
    margin-bottom: 12px;
  }

  .persons {
    column-gap: 32px;
  }
}

@media (max-width: 600px) {
  .hero {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 56px;
    min-height: auto;
    padding-block: 56px 88px;
  }

  .hero-title {
    text-align: center;
  }

  .eyebrow {
    margin-bottom: 16px;
  }

  h1 {
    font-size: clamp(1.5rem, 6.4vw, 2rem);
  }

  .author {
    margin-top: 16px;
  }

  .read-link {
    margin-top: 32px;
  }

  .purchase-link {
    margin-inline: auto;
  }

  .key-phrase {
    height: 29em;
  }

  .hero-index {
    right: 0;
    text-align: center;
    font-size: 0.75rem;
  }

  .section {
    padding-block: 64px;
  }

  h2 {
    margin-bottom: 32px;
  }

  .sides {
    font-size: 1rem;
    margin-top: 32px;
  }

  .persons {
    grid-template-columns: 1fr;
  }

  .closing {
    padding-top: 64px;
  }

  .colophon {
    margin-top: 64px;
  }
}