:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1a1a1a;
  --muted: #444b55;
  --line: #c9ced6;
  --accent: #0b5394;
  --accent-dark: #083e70;
  --focus: #b35900;
  --error: #8a1c1c;
  --error-bg: #fdeeee;
  --warn: #6b4a00;
  --warn-bg: #fff5d6;
  --info-bg: #eef3f9;
  --ok: #1e6b2e;
}
* { box-sizing: border-box; }
html { font-size: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, "Noto Sans", Arial, sans-serif;
  line-height: 1.5;
}
.wrap { max-width: 78rem; margin: 0 auto; padding: 0 1rem; }
.skip { position: absolute; left: -999em; }
.skip:focus { position: static; display: block; padding: .75rem 1rem; background: #ffe08a; color: #000; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
textarea:focus, select:focus, input:focus { outline: 3px solid var(--focus); outline-offset: 2px; }

.top { background: var(--panel); border-bottom: 1px solid var(--line); padding: 1.25rem 0 1rem; }
.brand { margin: 0; font-weight: 700; letter-spacing: .02em; color: var(--accent); font-size: 1.05rem; }
.top h1 { font-size: clamp(1.4rem, 2.6vw, 2rem); line-height: 1.2; margin: .25rem 0 .5rem; max-width: 46rem; }
.lede { margin: 0 0 .5rem; max-width: 52rem; color: var(--muted); font-size: 1.05rem; }
.lede.small { font-size: .95rem; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.25rem; padding-top: 1.25rem; padding-bottom: 1.25rem; }
@media (max-width: 900px) { .layout { grid-template-columns: minmax(0, 1fr); } }
.pane { background: var(--panel); border: 1px solid var(--line); border-radius: .6rem; padding: 1rem 1.25rem 1.25rem; min-width: 0; }
.pane h2 { font-size: 1.2rem; margin: .25rem 0 .75rem; display: flex; align-items: center; gap: .5rem; }
.pane h2 + * { margin-top: 0; }
#step3 { margin-top: 1.5rem; }
.step { display: inline-flex; align-items: center; justify-content: center; width: 1.7rem; height: 1.7rem; border-radius: 50%; background: var(--accent); color: #fff; font-size: .95rem; }

label { font-weight: 600; }
.examples label { display: block; margin-bottom: .25rem; }
.inline { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-top: .5rem; }
.examples .inline { margin-top: 0; }
select, textarea, button { font: inherit; color: inherit; }
select { min-height: 2.75rem; padding: .4rem .5rem; border: 2px solid #6b7280; border-radius: .4rem; background: #fff; max-width: 100%; }
textarea {
  width: 100%;
  min-height: 24rem;
  padding: .75rem;
  border: 2px solid #6b7280;
  border-radius: .4rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .95rem;
  line-height: 1.5;
  background: #fff;
  resize: vertical;
}
.big-label { display: block; margin-top: 1rem; font-size: 1.05rem; }
.hint { color: var(--muted); font-size: .92rem; margin: .25rem 0 .5rem; }

button { min-height: 2.75rem; padding: .45rem 1rem; border-radius: .4rem; border: 2px solid var(--accent); cursor: pointer; }
button.primary { background: var(--accent); color: #fff; font-weight: 700; font-size: 1.05rem; padding: .6rem 1.25rem; }
button.primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
button.secondary { background: #fff; color: var(--accent); }
button.secondary:hover { background: var(--info-bg); }
button[disabled] { opacity: .55; cursor: not-allowed; }

.guide { margin: 1rem 0 0; border: 1px solid var(--line); border-radius: .4rem; padding: .25rem .75rem; background: #fbfbfc; }
.guide summary { cursor: pointer; font-weight: 600; color: var(--accent); padding: .45rem 0; }
.guide table { border-collapse: collapse; width: 100%; font-size: .92rem; margin: .5rem 0 .75rem; }
.guide th, .guide td { text-align: left; vertical-align: top; padding: .4rem .5rem; border-top: 1px solid var(--line); }
.guide code { background: #eef0f3; padding: .05rem .25rem; border-radius: .2rem; font-size: .9em; overflow-wrap: anywhere; }
.guide ul { padding-left: 1.25rem; }

.check-summary { font-weight: 700; margin: 0 0 .5rem; }
.download { margin-bottom: .5rem; }
.check-list { list-style: none; margin: 0 0 1rem; padding: 0; max-height: 11rem; overflow: auto; }
.check-list:empty { display: none; }
.check-list li { padding: .4rem .6rem; border-radius: .3rem; margin-bottom: .3rem; font-size: .93rem; border-left: .3rem solid; }
.check-list .error { background: var(--error-bg); border-color: var(--error); color: var(--error); }
.check-list .warning { background: var(--warn-bg); border-color: #b38a00; color: var(--warn); }
.check-list .info { background: var(--info-bg); border-color: var(--accent); color: #1f3a57; }
.check-list .kind { font-weight: 700; }

.preview-frame { border: 2px solid var(--line); border-radius: .5rem; overflow: hidden; background: #fff; }
#preview { display: block; width: 100%; height: 34rem; border: 0; }

.download { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }
.file-info { margin: 0; color: var(--muted); }

.foot { color: var(--muted); font-size: .92rem; padding-bottom: 2rem; }
.foot a, .lede a { color: var(--accent); }