:root {
  color-scheme: light dark;
  --bg: #f6f7f9; --card: #ffffff; --ink: #1a1f2b; --mut: #5c6577; --line: rgba(0, 0, 0, .12);
  --accent: #1e8f6a; --accent-ink: #ffffff; --danger: #b32d2e;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1621; --card: #1c222c; --ink: #e7eaf1; --mut: #8b98a9; --line: rgba(255, 255, 255, .12); --accent: #3ddc97; --accent-ink: #0b1f18; --danger: #f6768a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 560px; margin: 48px auto; padding: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
@media (max-width: 600px) { main { margin: 0; border-radius: 0; border-width: 0 0 1px; padding: 20px 16px; } }
h1 { font-size: 22px; margin: 0 0 8px; }
.lead, .note { color: var(--mut); }
.note { font-size: 13.5px; }
button { font: inherit; font-weight: 600; padding: 10px 16px; border-radius: 8px; border: 1px solid transparent; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
button.secondary { background: transparent; color: var(--ink); border-color: var(--line); font-weight: 500; }
button:disabled { opacity: .6; cursor: default; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 16px 0 20px; }
dt { color: var(--mut); }
dd { margin: 0; overflow-wrap: anywhere; }
#status { min-height: 1.5em; font-size: 14px; }
#status.error { color: var(--danger); font-weight: 600; }