:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-muted: #f4f6fa;
  --fg: #1c2437;
  --fg-muted: #5b6478;
  --border: #dde2ec;
  --accent: #f29a2e;
  --accent-fg: #1c2437;
  --brand: #1c2d52;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151f;
    --bg-muted: #1a2030;
    --fg: #e6e9f0;
    --fg-muted: #a0a8ba;
    --border: #2b3345;
    --brand: #e6e9f0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    system-ui,
    -apple-system,
    'Hiragino Sans',
    'Noto Sans JP',
    sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

.hero {
  position: relative;
  padding: 64px 0 48px;
  text-align: center;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border);
}

.lang-switch {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.lang-switch [aria-current='page'] {
  color: var(--fg);
  font-weight: 600;
}

/* ロゴの文字色は紺なので、ダークモードでも読めるよう白地に載せる */
.logo {
  display: inline-block;
  margin: 0;
  padding: 8px 16px;
  border-radius: 16px;
  background: #ffffff;
}

.logo img {
  display: block;
  width: min(340px, 70vw);
  height: auto;
}

.lead {
  max-width: 720px;
  margin: 24px auto 8px;
  font-size: 1.05rem;
}

.note {
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-block;
  padding: 10px 24px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  border-color: var(--accent);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-fg);
}

.button.primary:hover {
  filter: brightness(1.05);
}

main .container {
  padding-top: 48px;
}

h2 {
  margin: 0 0 16px;
  color: var(--brand);
  font-size: 1.5rem;
}

h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.highlights li {
  padding: 20px;
  border: 1px solid var(--border);
  border-top: 4px solid var(--accent);
  border-radius: 12px;
  background: var(--bg-muted);
}

.highlights h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.highlights p {
  margin: 0;
  color: var(--fg-muted);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.features li {
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-muted);
}

.features p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.docs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.docs a {
  display: block;
  height: 100%;
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-muted);
  text-decoration: none;
}

.docs a:hover,
.docs a:focus-visible {
  border-color: var(--accent);
}

.docs p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

.footer {
  margin-top: 64px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

.screenshots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: 16px;
}

.screenshots figure {
  margin: 0;
}

.screenshots img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.screenshots figcaption {
  margin-top: 8px;
  color: var(--fg-muted);
  font-size: 0.9rem;
  text-align: center;
}

.steps {
  padding-left: 1.5em;
}

code {
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--bg-muted);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}