:root {
  --bg: #ffffff;
  --text: #1c1c1e;
  --muted: #6e6e73;
  --accent: #0a9c7a;
  --card: #f2f2f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --text: #f2f2f7;
    --muted: #a1a1a6;
    --accent: #2dd4a8;
    --card: #1c1c1e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Segoe UI", sans-serif;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

h1 { font-size: 28px; line-height: 1.3; margin: 8px 0 24px; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p { margin: 0 0 12px; color: var(--muted); }
a { color: var(--accent); word-break: break-all; }

.nav { font-size: 15px; }

.app {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 24px;
}

.app img {
  width: 72px;
  height: 72px;
  border-radius: 16px;
}

.app h1 { margin: 0; }

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 16px 20px;
  margin: 16px 0;
}

.card p { margin: 0; }