:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --card: #ffffff;
  --border: #e3e3e6;
  --text-primary: #1a1a1a;
  --text-secondary: #5a5a60;
  --accent: #e8722a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121214;
    --card: #1c1c1f;
    --border: #303034;
    --text-primary: #f2f2f3;
    --text-secondary: #a3a3a8;
    --accent: #f08a4b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}
nav .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 17px;
  color: var(--text-primary);
  text-decoration: none;
}
nav .brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: block;
}
nav .links {
  display: flex;
  gap: 18px;
}
nav .links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
}
nav .links a:hover,
nav .links a.active {
  color: var(--accent);
}
h1 {
  font-size: 28px;
  font-weight: 800;
  margin: 0 0 8px;
}
.subtitle {
  color: var(--text-secondary);
  margin: 0 0 40px;
  font-size: 15px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 20px;
}
h2 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 10px;
}
p {
  margin: 0 0 12px;
  color: var(--text-secondary);
  font-size: 14.5px;
}
p:last-child { margin-bottom: 0; }
a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}
a:hover { text-decoration: underline; }
ul {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 14.5px;
}
li { margin-bottom: 6px; }
footer {
  margin-top: 40px;
  color: var(--text-secondary);
  font-size: 12.5px;
  text-align: center;
}

/* Landing page only */
.hero {
  text-align: center;
  padding: 40px 0 24px;
}
.hero img.logo {
  width: 88px;
  height: 88px;
  border-radius: 22px;
  margin-bottom: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}
.hero h1 { font-size: 34px; }
.hero p.tagline {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 24px;
}
.hero .cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 14.5px;
}
.hero .cta:hover { text-decoration: none; opacity: 0.92; }