:root {
  color-scheme: light dark;
  --bg: #0f1117;
  --card: #1a1d27;
  --text: #f4f5f7;
  --muted: #a8b0c0;
  --accent: #6ee7b7;
  --border: #2a3040;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb;
    --card: #ffffff;
    --text: #12141a;
    --muted: #5c6578;
    --accent: #0d9488;
    --border: #e4e8f0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

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

header,
main,
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  padding-top: 32px;
  padding-bottom: 16px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 14px;
}

nav a {
  text-decoration: none;
}

nav a[aria-current="page"] {
  font-weight: 600;
  text-decoration: underline;
}

main {
  padding-bottom: 48px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
}

h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  line-height: 1.2;
}

.brand-hero {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.app-logo {
  flex-shrink: 0;
  width: 96px;
  height: 96px;
  border-radius: 22px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.brand-hero .lead {
  margin: 0;
}

@media (max-width: 520px) {
  .brand-hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

.lead {
  color: var(--muted);
  margin: 0 0 24px;
}

h2 {
  margin: 28px 0 8px;
  font-size: 1.125rem;
}

p,
li {
  color: var(--muted);
}

ul {
  padding-left: 1.25rem;
}

footer {
  padding-bottom: 32px;
  font-size: 13px;
  color: var(--muted);
}