:root {
  --bg: #f6f6f4; --fg: #1b1b1b; --muted: #5f5f5a; --card: #ffffff; --line: #d6d6d0;
  --accent: #1f5fbf; --accent-fg: #ffffff; --ok-bg: #e5f3e8; --ok-fg: #17522a;
  --err-bg: #fbe7e6; --err-fg: #8a1c14;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414; --fg: #ececea; --muted: #a3a39d; --card: #1e1e1e; --line: #3a3a37;
    --accent: #5b9bff; --accent-fg: #0b0b0b; --ok-bg: #173a22; --ok-fg: #bfe8c9;
    --err-bg: #47201c; --err-fg: #f7c6c0;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 34rem; margin: 0 auto; padding: 20px 16px 48px; }
h1 { font-size: 1.35rem; margin: 0 0 4px; }
h2 { font-size: 1.05rem; margin: 28px 0 8px; }
p { margin: 8px 0; }
.muted { color: var(--muted); font-size: 0.92rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
label { display: block; font-weight: 600; margin: 14px 0 6px; }
input[type=text], textarea {
  width: 100%; font: inherit; color: var(--fg); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px; min-height: 48px;
}
textarea { min-height: 120px; resize: vertical; font-family: ui-monospace, Menlo, Consolas, monospace; }
.check { display: flex; align-items: center; gap: 10px; font-weight: 400; margin-top: 16px; min-height: 44px; }
.check input { width: 24px; height: 24px; }
button, .button {
  display: inline-block; width: 100%; margin-top: 18px; min-height: 52px; padding: 12px 16px;
  font: inherit; font-weight: 600; text-align: center; text-decoration: none;
  color: var(--accent-fg); background: var(--accent); border: 0; border-radius: 10px; cursor: pointer;
}
.secondary { color: var(--fg); background: transparent; border: 1px solid var(--line); }
.notice { border-radius: 10px; padding: 12px 14px; margin: 14px 0; }
.ok { background: var(--ok-bg); color: var(--ok-fg); }
.err { background: var(--err-bg); color: var(--err-fg); }
ul.names { list-style: none; padding: 0; margin: 0; }
ul.names li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 2px;
  border-bottom: 1px solid var(--line); }
ul.names code { font-size: 0.95rem; word-break: break-all; }
.top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.top form button { width: auto; margin: 0; min-height: 44px; }