:root {
  --bg: #ffffff;
  --bg-soft: #f4f5fb;
  --fg: #1d2033;
  --fg-soft: #545a75;
  --accent: #3f51b5;
  --accent-fg: #ffffff;
  --border: #dde0ee;
  --code-bg: #0d1117;
  --code-fg: #e6edf3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-soft: #151b26;
    --fg: #e6edf3;
    --fg-soft: #9aa4b8;
    --accent: #8c9eff;
    --accent-fg: #0d1117;
    --border: #2a3242;
    --code-bg: #161b22;
  }
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--accent);
}

code {
  font-family: ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

header.top {
  border-bottom: 1px solid var(--border);
}

header.top .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--fg);
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 24px;
  height: 24px;
}

header.top nav {
  display: flex;
  gap: 16px;
  margin-left: auto;
  font-size: 0.95rem;
}

header.top nav a {
  color: var(--fg-soft);
  text-decoration: none;
}

header.top nav a:hover {
  color: var(--fg);
}

.hero {
  padding: 56px 0 32px;
  text-align: center;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.2rem);
  line-height: 1.2;
}

.hero .lead {
  max-width: 720px;
  margin: 16px auto 0;
  color: var(--fg-soft);
  font-size: 1.15rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-block;
  padding: 10px 20px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}

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

.shot {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0d1117;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

.demo {
  padding: 8px 0 48px;
}

section.features {
  padding: 32px 0;
}

.feature {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 32px;
  align-items: center;
  padding: 32px 0;
}

.feature:nth-child(even) {
  grid-template-columns: 3fr 2fr;
}

.feature:nth-child(even) .text {
  order: 2;
}

.feature h2 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  line-height: 1.3;
}

.feature p {
  margin: 0 0 8px;
  color: var(--fg-soft);
}

.feature ul {
  margin: 8px 0 0;
  padding-left: 1.2em;
  color: var(--fg-soft);
}

.more {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}

.more h2,
.install h2 {
  margin: 0 0 24px;
  font-size: 1.5rem;
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
}

.card h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

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

.install {
  padding: 48px 0;
}

.install pre {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 20px;
  overflow-x: auto;
  border-radius: 10px;
  background: var(--code-bg);
  color: var(--code-fg);
  line-height: 1.6;
}

.install p {
  max-width: 760px;
  margin: 16px auto 0;
  color: var(--fg-soft);
}

footer {
  padding: 24px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--fg-soft);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 800px) {
  .feature,
  .feature:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature:nth-child(even) .text {
    order: 0;
  }

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

  header.top nav .hide-narrow {
    display: none;
  }
}