:root {
  --bg: #eef1f4; --surface: #ffffff; --ink: #17202b; --muted: #5d6978; --line: #d6dde5;
  --accent: #1d5fd1; --accent-ink: #ffffff;
  --ok: #1e8a4c; --ok-bg: #e3f4ea; --warn: #9a5b00; --warn-bg: #fdf1dc; --bad: #b3261e; --bad-bg: #fbe7e6;
  --font-ui: -apple-system, "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1419; --surface: #182029; --ink: #e6ebf1; --muted: #93a0b0; --line: #2a3542;
    --accent: #6d9cff; --accent-ink: #0b1220;
    --ok: #5fd08f; --ok-bg: #133323; --warn: #f0b660; --warn-bg: #3a2a12; --bad: #ff8a80; --bad-bg: #3d1a18;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }  /* .card sets display: grid, which would otherwise beat the hidden attribute */
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--font-ui); font-size: 15px; line-height: 1.5; }
.wrap { max-width: 620px; margin: 0 auto; padding: 24px 16px 48px; display: grid; gap: 18px; }
header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
header h1 { margin: 0; font-size: 24px; }
.ver { color: var(--muted); font-size: 13px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px; display: grid; gap: 12px; }
h2 { margin: 0; font-size: 16px; }
.hint { margin: 0; color: var(--muted); font-size: 13.5px; }
textarea { width: 100%; font-family: var(--font-mono); font-size: 12.5px; line-height: 1.45; min-height: 96px; resize: vertical; word-break: break-all; padding: 10px 12px; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.meta { display: flex; justify-content: space-between; gap: 8px; font-size: 12.5px; color: var(--muted); }
.check { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; }
.primary { font: inherit; font-weight: 600; font-size: 16px; padding: 13px; border-radius: 10px; border: 0; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
.primary:disabled { opacity: 0.45; cursor: not-allowed; }
.notice { border-radius: 10px; padding: 10px 12px; font-size: 14px; }
.notice.warn { background: var(--warn-bg); color: var(--warn); }
.notice.ok { background: var(--ok-bg); color: var(--ok); }
.notice.bad { background: var(--bad-bg); color: var(--bad); }
progress { width: 100%; height: 10px; }
details summary { cursor: pointer; color: var(--muted); font-size: 13px; }
pre#log { margin: 8px 0 0; max-height: 260px; overflow: auto; font-family: var(--font-mono); font-size: 12px; background: var(--bg); border-radius: 8px; padding: 10px; white-space: pre-wrap; word-break: break-all; }
ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 13.5px; display: grid; gap: 4px; }
.step { color: var(--muted); font-size: 13px; font-weight: 600; }
.meta-right { display: flex; align-items: center; gap: 10px; }
.small { font: inherit; font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 8px; border: 1px solid var(--accent); background: transparent; color: var(--accent); cursor: pointer; }
.small:disabled { opacity: 0.45; cursor: not-allowed; }
.dup { display: grid; gap: 8px; border: 2px solid var(--bad); }
.dup b { font-size: 15px; }
.danger { background: var(--bad); }
.back { font: inherit; font-size: 16px; font-weight: 700; padding: 12px 16px; border-radius: 10px; border: 2px solid var(--accent); background: var(--surface); color: var(--accent); cursor: pointer; justify-self: start; }
.back:hover { background: var(--accent); color: var(--accent-ink); }
.back:disabled { opacity: 0.45; cursor: not-allowed; }
.modal { max-width: 480px; width: calc(100% - 32px); border: 1px solid var(--line); border-radius: 14px; padding: 20px; background: var(--surface); color: var(--ink); }
.modal[open] { display: grid; gap: 14px; }
.modal h2 { font-size: 18px; color: var(--ok); }
.modal p { margin: 0; line-height: 1.6; }
.modal::backdrop { background: rgba(0, 0, 0, 0.6); }
.modal h2.warn { color: var(--warn); }