:root {
  --primary: #059669;
  --primary-dark: #064e3b;
  --text: #111827;
  --muted: #374151;
  --bg: #f5f5f7;
  --surface: #ffffff;
  --border: #e5e7eb;
  --header-bg: #064e3b;
  --header-border: #047857;
  --header-title: #ecfdf5;
  --header-app: #a7f3d0;
  --max: 44rem;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}
header {
  padding: 1.5rem 1.35rem 1.1rem;
  color: var(--header-title);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
}
header h1 {
  margin: 0;
  font-size: 1.45rem;
  color: var(--header-title);
  font-weight: 800;
}
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.35rem 2.5rem;
  background: var(--surface);
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1.2rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
a { color: var(--primary); font-weight: 700; }
h2 { margin: 1.8rem 0 .55rem; font-size: 1.08rem; color: var(--primary-dark); }
p, li { color: var(--muted); }
header p,
header .app-name {
  margin: .3rem 0 0;
  font-size: .82rem;
  line-height: 1.3;
  color: var(--header-app);
  font-weight: 600;
}
.meta { font-size: .88rem; color: var(--muted); }
.warning {
  padding: 1rem;
  border: 2px solid #dc2626;
  border-radius: 10px;
  color: #7f1d1d;
  background: #fef2f2;
  font-weight: 700;
}
footer { max-width: var(--max); margin: 0 auto; padding: 1rem 1.35rem 2rem; color: var(--muted); }

html[data-app-theme="dark"] {
  --primary: #6ee7b7;
  --primary-dark: #d1fae5;
  --text: #f5f5f7;
  --muted: #d1d5db;
  --bg: #111827;
  --surface: #1f2937;
  --border: #374151;
  --header-bg: #064e3b;
  --header-border: #047857;
  --header-title: #ecfdf5;
  --header-app: #a7f3d0;
}

@media (prefers-color-scheme: dark) {
  html:not([data-app-theme]) {
    --primary: #6ee7b7;
    --primary-dark: #d1fae5;
    --text: #f5f5f7;
    --muted: #d1d5db;
    --bg: #111827;
    --surface: #1f2937;
    --border: #374151;
    --header-bg: #064e3b;
    --header-border: #047857;
    --header-title: #ecfdf5;
    --header-app: #a7f3d0;
  }
}