/* base.css from local-tool-kit (390 px rules) */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; overflow-wrap: anywhere; }
img, svg, canvas, video { max-width: 100%; height: auto; }
input, select, textarea, button { font: inherit; max-width: 100%; }
input, select, textarea { width: 100%; }
label, fieldset, .row > *, .grid > * { min-width: 0; }
pre, code { white-space: pre-wrap; }
.hidden { display: none !important; }
@media (max-width: 480px) {
  .row { display: block; }
  .row > * + * { margin-top: 8px; }
}

/* look, from nec_book */
:root { --bg:#f5f7fa; --card:#fff; --ink:#18202b; --muted:#5a6573; --line:#dde2e8; --accent:#1f5fbf; --ok:#1d7a46; --bad:#b4232c; --warn:#9a5b00; --btn:#1f5fbf; }
@media (prefers-color-scheme: dark) { :root { --bg:#12161b; --card:#1b2027; --ink:#e7eaee; --muted:#a2abb6; --line:#323a44; --accent:#8ab4ff; --ok:#5cc98c; --bad:#f0646c; --warn:#f2b45a; } }
body { background: var(--bg); color: var(--ink); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 760px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.45rem; margin: 8px 0 4px; }
h2 { font-size: 1.1rem; margin: 0 0 8px; }
.tag, .hint { color: var(--muted); }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin: 12px 0; }
.panel.small { font-size: .9rem; }
label { display: block; font-size: .9rem; color: var(--muted); margin-bottom: 4px; }
input { padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); }
.row { display: flex; gap: 10px; align-items: center; }
.row input { flex: 1; }
.btn { padding: 10px 16px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; white-space: nowrap; }
.btn.primary { background: var(--btn); border-color: var(--btn); color: #fff; }
.btn:disabled { opacity: .5; cursor: default; }
.btn:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
a { color: var(--accent); }
.msg { min-height: 1.2em; margin: 8px 0 0; }
.readbox { border: 1px dashed var(--line); border-radius: 8px; padding: 8px 12px; margin: 8px 0 0; font-size: .9rem; }
.readbox p { margin: 4px 0; }
.res-act { border-left: 6px solid var(--bad); }
.res-check { border-left: 6px solid var(--warn); }
.res-info { border-left: 6px solid var(--accent); }
ol, ul { padding-left: 20px; }
li { margin: 4px 0; }
code { font-size: .9em; }