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

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

body {
  margin: 0;
  padding: 2rem 1.25rem 3rem;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: #37352f;
  background-color: #ffffff;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #e3e2e0;
    background-color: #191919;
  }
}

a {
  color: #2383e2;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

@media (prefers-color-scheme: dark) {
  a {
    color: #6eb5ff;
  }
}

.page {
  max-width: 720px;
  margin: 0 auto;
}

.page-header {
  margin-bottom: 2.5rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
  color: #787774;
}

@media (prefers-color-scheme: dark) {
  .back-link {
    color: #9b9a97;
  }
}

.back-link:hover {
  color: #2383e2;
}

@media (prefers-color-scheme: dark) {
  .back-link:hover {
    color: #6eb5ff;
  }
}

.hero {
  text-align: center;
  padding: 1rem 0 2rem;
}

.app-icon {
  display: block;
  width: 96px;
  height: 96px;
  margin: 0 auto 1.25rem;
  border-radius: 22%;
  object-fit: cover;
}

.app-icon--doc {
  margin: 0 0 1.25rem;
}

.app-name {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.app-platform {
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  color: #787774;
}

@media (prefers-color-scheme: dark) {
  .app-platform {
    color: #9b9a97;
  }
}

.intro {
  margin: 0 0 2rem;
  text-align: left;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.375rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

p {
  margin: 0 0 1rem;
}

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.375rem;
}

li > ul,
li > ol {
  margin-top: 0.375rem;
  margin-bottom: 0;
}

.meta {
  margin-bottom: 2rem;
  font-size: 0.875rem;
  color: #787774;
}

@media (prefers-color-scheme: dark) {
  .meta {
    color: #9b9a97;
  }
}

.content-placeholder {
  padding: 1.25rem 1rem;
  border-radius: 4px;
  background-color: #f7f6f3;
  color: #787774;
  font-style: italic;
}

@media (prefers-color-scheme: dark) {
  .content-placeholder {
    background-color: #252525;
    color: #9b9a97;
  }
}

.actions {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
}

.button {
  display: inline-block;
  padding: 0.625rem 1rem;
  border-radius: 6px;
  font-size: 0.9375rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.button-primary {
  color: #ffffff;
  background-color: #2383e2;
}

.button-primary:hover {
  background-color: #1a6fc7;
  text-decoration: none;
}

@media (prefers-color-scheme: dark) {
  .button-primary {
    background-color: #2383e2;
  }

  .button-primary:hover {
    background-color: #1a6fc7;
  }
}

.button-secondary {
  color: #37352f;
  background-color: #f1f1ef;
  border: 1px solid rgba(55, 53, 47, 0.09);
}

.button-secondary:hover {
  background-color: #e9e9e7;
  text-decoration: none;
}

@media (prefers-color-scheme: dark) {
  .button-secondary {
    color: #e3e2e0;
    background-color: #2f2f2f;
    border-color: rgba(255, 255, 255, 0.08);
  }

  .button-secondary:hover {
    background-color: #3a3a3a;
  }
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin: 2rem 0;
  padding: 0;
  list-style: none;
}

.links li {
  margin: 0;
}

.links a {
  font-size: 0.9375rem;
}

.page-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(55, 53, 47, 0.09);
  font-size: 0.8125rem;
  color: #787774;
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  .page-footer {
    border-top-color: rgba(255, 255, 255, 0.08);
    color: #9b9a97;
  }
}

@media (min-width: 480px) {
  body {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}