:root {
  --bg: #f6f8f7; --card: #fff; --text: #14201a; --muted: #5b6b62; --line: #dbe4df;
  --brand: #3DD453; --brand-ink: #0B1F0E; --link: #14803c; --danger: #b3261e; --ok-bg: #e6f4ea; --warn-bg: #fdf1e0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1512; --card: #16201b; --text: #e8f0ec; --muted: #9db0a6; --line: #26362e;
    --brand: #3DD453; --brand-ink: #0B1F0E; --link: #3DD453; --danger: #ff8a80; --ok-bg: #12301d; --warn-bg: #33270f;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 560px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 1.6rem; line-height: 1.2; margin: 8px 0 4px; }
h2 { font-size: 1.1rem; margin: 0 0 8px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; letter-spacing: .2px; color: var(--text); margin: 0 0 8px; }
.brand img { display: block; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin: 16px 0; }
label { display: block; font-weight: 600; margin: 12px 0 4px; }
input, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px;
}
textarea { min-height: 84px; resize: vertical; }
input:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
button {
  font: inherit; font-weight: 600; cursor: pointer; border-radius: 10px; padding: 12px 16px;
  border: 1px solid var(--line); background: var(--card); color: var(--text); min-height: 44px;
}
button.primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
button:disabled { opacity: .5; cursor: not-allowed; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.row > * { flex: 1 1 120px; }
.notice { border-radius: 10px; padding: 10px 12px; margin: 12px 0; background: var(--warn-bg); }
.notice.ok { background: var(--ok-bg); }
.notice.err { color: var(--danger); }
.big { font-size: 1.5rem; font-weight: 700; letter-spacing: .5px; }
ul.scopes { padding-left: 20px; margin: 8px 0 16px; }
.hidden { display: none !important; }
a { color: var(--link); }
.block { width: 100%; }
.lead { font-size: 1.05rem; margin: 4px 0 12px; }
.divider { text-align: center; margin: 16px 0 0; }
.row.center { align-items: center; }
.no-grow { flex: 0 0 auto; }
.mt { margin-top: 16px; }
details { border-top: 1px solid var(--line); padding: 10px 0; }
summary { cursor: pointer; font-weight: 600; }
details p, details ul { margin: 8px 0 0; }
code { background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; word-break: break-all; }
.help { font-weight: 600; text-decoration: none; padding: 10px 12px; }
.help-foot { text-align: center; margin-top: 24px; }
.field-help { font-size: .9rem; margin: 6px 0 14px; }