:root {
  color-scheme: light dark;
  --bg: #ffffff; --fg: #1a1a1a; --muted: #555555; --border: #d5d5d5;
  --accent: #1a56db; --accent-fg: #ffffff; --notice-bg: #f3f5f8; --code-bg: #f2f2f2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212; --fg: #eaeaea; --muted: #b3b3b3; --border: #3c3c3c;
    --accent: #7aa6ff; --accent-fg: #0a0a0a; --notice-bg: #1e1e1e; --code-bg: #1a1a1a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 1.75rem 1rem 3rem;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.65;
}

main { max-width: 40rem; margin: 0 auto; }

h1 { font-size: 1.9rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.25rem; margin-top: 2.25rem; }
h3 { font-size: 1.1rem; margin: 0 0 0.5rem; }
.lead { font-size: 1.1rem; margin: 0.25rem 0; }
.disclaimer { font-size: 0.9rem; color: var(--muted); margin-top: 0.5rem; }

.steps { list-style: none; counter-reset: step; margin: 2rem 0; padding: 0; }

.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0.25rem 0 0.25rem 3rem;
  margin: 0 0 2rem 0.75rem;
  border-left: 3px solid var(--border);
}

.steps > li::before {
  content: counter(step);
  position: absolute; left: -1.4rem; top: -0.1rem;
  width: 2.3rem; height: 2.3rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 1.15rem; font-weight: 700; line-height: 2.3rem; text-align: center;
}

#copyBtn {
  font: inherit;
  font-size: 1.1rem;
  font-weight: 600;
  padding: 0.7rem 1.4rem;
  margin-top: 0.25rem;
  border-radius: 0.4rem;
  border: 2px solid var(--accent);
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
}

#copyBtn:disabled { opacity: 0.5; cursor: not-allowed; }
.meta { font-size: 0.85rem; color: var(--muted); margin: 0.6rem 0 0; }
.aside { font-size: 0.9rem; color: var(--muted); margin: 0.5rem 0 0; }
.error { font-size: 0.9rem; margin: 0.6rem 0 0; }

.notice {
  background: var(--notice-bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  margin-top: 1.5rem;
}

details {
  margin: 1.25rem 0;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem 1.1rem;
}

details > :last-child { margin-bottom: 0; }
summary { cursor: pointer; font-weight: 600; }
.see-prompt { margin: 0.9rem 0 0; }

pre#promptText {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--code-bg);
  padding: 0.75rem;
  border-radius: 0.4rem;
  font-size: 0.85rem;
  max-height: 24rem;
  overflow: auto;
}

footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

a { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.level { display: flex; align-items: center; gap: 0.5rem; margin: 0.7rem 0 0; font-size: 0.95rem; color: var(--muted); cursor: pointer; }
.level input { width: 1.05rem; height: 1.05rem; margin: 0; }