:root {
  --primary: #1D9E75;
  --dark: #0F6E56;
  --mid: #9FE1CB;
  --light: #E1F5EE;
  --ink: #085041;
  --bg: #F7FBF9;
  --card: #FFFFFF;
  --text: #10261F;
  --muted: #4E6B62;
  --warn-bg: #FFF4E5;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1F19;
    --card: #12302A;
    --text: #E1F5EE;
    --muted: #9FC9BB;
    --warn-bg: #3A2A12;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}
main {
  max-width: 560px;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
}
header { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; }
header img { border-radius: 12px; }
h1 { margin: 0; font-size: 22px; color: var(--primary); }
h2 { margin: 0 0 8px; font-size: 18px; }
h3 { margin: 16px 0 4px; font-size: 15px; }
.muted { color: var(--muted); margin: 4px 0 0; font-size: 14px; }
.card { background: var(--card); border-radius: 14px; padding: 16px; margin-bottom: 12px; box-shadow: 0 1px 3px rgb(0 0 0 / 8%); }
.card.warn { background: var(--warn-bg); }
ol { padding-left: 20px; margin: 8px 0 0; }
li { margin-bottom: 6px; }
button {
  display: block;
  width: 100%;
  min-height: 48px;
  margin-top: 10px;
  border-radius: 12px;
  border: 1.5px solid var(--primary);
  background: transparent;
  color: var(--primary);
  font: 600 16px/1 inherit;
  font-family: inherit;
}
button.primary { background: var(--primary); color: #fff; }
button.link { border: 0; min-height: 40px; font-weight: 500; color: var(--muted); }
button:disabled { opacity: 0.5; }
#message { min-height: 1.5em; font-weight: 600; color: var(--dark); }
@media (prefers-color-scheme: dark) { #message { color: var(--mid); } }
pre {
  white-space: pre-wrap;
  word-break: break-all;
  font-size: 12px;
  background: var(--bg);
  border-radius: 8px;
  padding: 8px;
  margin: 0;
}