:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #f6821f;
  --border: #334155;
}

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

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  padding: 48px 0 32px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.site-header h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--muted);
  font-size: 1.1rem;
}

main {
  padding: 40px 0;
}

.hero {
  text-align: center;
  margin-bottom: 48px;
}

.hero h2 {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.hero p {
  max-width: 640px;
  margin: 0 auto 24px;
  color: var(--muted);
}

.button {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #1e293b;
  font-weight: bold;
  text-decoration: none;
  border-radius: 6px;
  transition: opacity 0.2s;
}

.button:hover {
  opacity: 0.85;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.card h3 {
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.deploy {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.deploy h2 {
  margin-bottom: 16px;
}

.deploy ol {
  padding-left: 24px;
}

.deploy li {
  margin-bottom: 8px;
}

code {
  background: #0b1220;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
}

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