:root {
  --bg: #f7f7f9;
  --surface: #ffffff;
  --text: #16161d;
  --muted: #5b5b6b;
  --accent: #5b3df5;
  --border: #e4e4ec;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

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

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.bar {
  max-width: 880px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.bar img { height: 44px; width: auto; display: block; }

nav a {
  color: var(--text);
  text-decoration: none;
  margin-left: 20px;
  font-weight: 500;
}

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

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

.hero { text-align: center; padding: 48px 0; }
.hero img { width: 240px; max-width: 70%; height: auto; }
.hero h1 { font-size: 2rem; margin: 24px 0 8px; }
.hero p { color: var(--muted); font-size: 1.1rem; margin: 0 auto; max-width: 520px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

.card h1 { margin-top: 0; }
.card h2 { font-size: 1.2rem; margin-top: 32px; }
.card h3 { font-size: 1rem; margin-top: 20px; }
.updated { color: var(--muted); }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 24px 16px 40px;
}

@media (max-width: 600px) {
  .card { padding: 20px; }
  nav a { margin-left: 12px; }
}