:root {
  color-scheme: dark;
  --bg: #0b0b0e;
  --surface: #16161c;
  --text: #f2f2f5;
  --muted: #9a9aa8;
  --accent: #7b8cff;
  --border: #2a2a33;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

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

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--text);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--text);
}

h1 {
  margin: 0 0 12px;
  font-size: 2rem;
  line-height: 1.2;
}

h2 {
  margin: 32px 0 12px;
  font-size: 1.25rem;
}

h3 {
  margin: 24px 0 8px;
  font-size: 1.05rem;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 28px;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 16px 0;
}

.card-list {
  display: grid;
  gap: 14px;
  margin: 20px 0 8px;
}

.app-card h2 {
  margin: 0 0 6px;
  font-size: 1.15rem;
}

.app-card p {
  margin: 0 0 12px;
  color: #d8d8e0;
}

.app-card .links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

ul {
  padding-left: 1.25rem;
}

p,
li {
  color: #d8d8e0;
}

footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.back {
  display: inline-block;
  margin-bottom: 20px;
  text-decoration: none;
}