:root {
  color-scheme: light dark;
  --bg: #f6f7f9; --fg: #14161a; --muted: #5d6573; --card: #ffffff; --line: #e2e5ea;
  --accent: #1f6feb; --accent-fg: #ffffff; --deny: #b42318; --notice: #fff8e6;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --fg: #e8eaee; --muted: #9aa3b2; --card: #171a21; --line: #262b35;
          --accent: #4c8dff; --notice: #2a2412; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
}
header { display: flex; justify-content: space-between; align-items: baseline; padding: 16px 20px 4px; }
h1 { font-size: 22px; margin: 0; letter-spacing: .01em; }
h2 { font-size: 18px; margin: 20px 0 10px; }
h3 { font-size: 16px; margin: 0 0 6px; }
main { padding: 0 16px 40px; max-width: 560px; margin: 0 auto; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin: 12px 0; }
.card.notice { background: var(--notice); }
.summary { font-size: 18px; margin: 0 0 6px; word-break: break-word; white-space: pre-wrap; }
.meta { font-size: 14px; margin: 0 0 12px; }
.row { display: flex; gap: 10px; }
.row button { flex: 1; }
button {
  font: inherit; font-weight: 600; min-height: 48px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--card); color: var(--fg); padding: 0 16px;
}
button.primary { background: var(--accent); color: var(--accent-fg); border-color: transparent; }
button.deny { color: var(--deny); }
button:disabled { opacity: .5; }
label { display: block; margin: 12px 0; font-size: 15px; color: var(--muted); }
input, textarea {
  display: block; width: 100%; margin-top: 6px; font: inherit; color: var(--fg); background: var(--card);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px;
}
textarea { font: 13px/1.4 ui-monospace, Menlo, monospace; }
.fp { font: 600 22px ui-monospace, Menlo, monospace; letter-spacing: .06em; text-align: center; margin: 10px 0; }
code { font: 14px ui-monospace, Menlo, monospace; }
#toast { min-height: 1.5em; margin-top: 16px; }