:root {
  --bg: #f7f6f3; --card: #ffffff; --ink: #1d1b22; --muted: #6b6774; --line: #e6e3ea;
  --accent: #5b3fd1; --accent-ink: #ffffff; --ok: #1f7a4d; --err: #b42318; --warn: #fff7e6;
  --radius: 14px; font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #141218; --card: #1e1b24; --ink: #f1eff5; --muted: #a39fae; --line: #2f2b37; --accent: #9b86ff; --accent-ink: #141218; --warn: #2b2416; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.5; }
.shell { max-width: 720px; margin: 0 auto; padding: 16px; }
.top { display: flex; align-items: center; justify-content: space-between; padding: 8px 0 20px; }
.top nav { display: flex; gap: 16px; }
a { color: var(--accent); }
.brand { font-weight: 700; font-size: 18px; text-decoration: none; color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: 26px; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }
.stack > * + * { margin-top: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.card.warn { background: var(--warn); }
label { display: block; font-weight: 600; font-size: 14px; margin: 12px 0 4px; }
input, select { width: 100%; font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
input:focus, select:focus, .btn:focus-visible, a:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 40%, transparent); outline-offset: 2px; }
.btn { display: inline-block; font: inherit; font-weight: 600; padding: 10px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; text-decoration: none; margin-top: 12px; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { color: var(--err); }
.btn.small { padding: 6px 12px; font-size: 14px; margin-top: 0; }
.btn:disabled { opacity: 0.6; cursor: wait; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.list { list-style: none; padding: 0; margin: 0; }
.row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.row:first-child { border-top: 0; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.help { color: var(--muted); font-size: 14px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; word-break: break-all; }
.big { font-size: 20px; letter-spacing: 0.04em; }
.notice { padding: 10px 12px; border-radius: 10px; background: var(--bg); border: 1px solid var(--line); }
.notice.ok { color: var(--ok); }
.notice.err { color: var(--err); }
.banner { display: block; padding: 12px 16px; border-radius: var(--radius); background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; margin-bottom: 16px; }
.summary { white-space: pre-wrap; background: var(--bg); padding: 12px; border-radius: 10px; font: 14px/1.5 ui-monospace, Menlo, monospace; max-height: 50vh; overflow: auto; }
.tag { display: inline-block; white-space: nowrap; font-size: 12px; padding: 2px 8px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }
.tag.standing { color: var(--ok); }
code { font-family: ui-monospace, Menlo, monospace; font-size: 13px; }
.loading { padding: 40px; text-align: center; color: var(--muted); }