:root {
  --paper: #fff; --ink: #000; --muted: #555; --surface: #f2f2f2;
  --red: #DA291C; --blue: #0033A0; --green: #009639; --yellow: #FFCD00;
  /* Helvetica Neue on Apple devices; Arial precedes legacy Helvetica aliases
     because some Linux installations expose Helvetica with unpaintable glyphs. */
  --display: 'Helvetica Neue', Arial, Helvetica, sans-serif;
  --body: 'Times New Roman', Times, serif; --rule: 1px solid var(--ink);
  color-scheme: light; font: 17px/1.5 var(--body); color: var(--ink); background: var(--paper); font-synthesis: none;
}
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
.masthead, main { max-width: 1440px; margin: auto; padding: 28px 40px; }
.masthead { display: flex; justify-content: space-between; gap: 24px; align-items: center; border-bottom: var(--rule); position: relative; }
.masthead::after { content: ''; position: absolute; bottom: -1px; left: 40px; width: 96px; height: 4px; background: linear-gradient(to right, var(--red) 0 25%, var(--blue) 25% 50%, var(--green) 50% 75%, var(--yellow) 75%); }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; line-height: 1.15; }
h1, h2, h3 { text-transform: uppercase; letter-spacing: .02em; }
h1 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -.035em; }
h2 { font-size: 1.15rem; }
h3 { font-size: .95rem; }
.intro { max-width: 720px; margin-bottom: 30px; }
.intro ol { margin: 0; padding-left: 1.5em; }
.workspace { display: grid; grid-template-columns: minmax(300px, .85fr) minmax(0, 1.3fr); gap: 24px; align-items: start; }
.panel { padding: 26px; border: var(--rule); background: var(--paper); min-width: 0; }
.section-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.step { font: 700 .75rem var(--display); border: var(--rule); padding: 6px 8px; }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
label { display: block; font-size: .9rem; margin-bottom: 6px; }
input, select, textarea, button, .file-label { font: inherit; }
input, select, textarea { width: 100%; min-width: 0; min-height: 44px; color: var(--ink); background: var(--paper); border: var(--rule); border-radius: 0; padding: 10px; }
textarea { resize: vertical; }
button, .file-label { display: inline-flex; justify-content: center; align-items: center; border: var(--rule); border-radius: 0; color: var(--ink); background: var(--paper); padding: 10px 12px; min-height: 44px; min-width: 44px; cursor: pointer; font: 700 .78rem/1.35 var(--display); text-align: center; }
button:hover, .file-label:hover { background: var(--ink); color: var(--paper); }
button:disabled, fieldset:disabled button { cursor: default; opacity: .5; }
fieldset:disabled input, fieldset:disabled select, fieldset:disabled textarea { background: var(--surface); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.primary { background: var(--ink); color: var(--paper); }
.primary:hover { background: var(--paper); color: var(--ink); }
.optional, .muted, .hint { color: var(--muted); }
.optional { font-size: .8rem; font-weight: 400; }
.hint { font-size: .88rem; line-height: 1.5; margin: 9px 0 16px; }
.field-pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; margin: 14px 0; }
.end-card-fields { border-top: var(--rule); padding-top: 20px; margin-top: 22px; }
.end-card-fields > textarea { margin-bottom: 14px; }
.check-label { display: flex; align-items: center; gap: 10px; min-height: 44px; margin: 12px 0 16px; cursor: pointer; }
.check-label input { width: 20px; height: 20px; min-height: 0; flex: 0 0 20px; margin: 0; accent-color: var(--ink); }
.edition { border-top: var(--rule); padding-top: 20px; margin: 20px 0 14px; }
.page-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: end; margin-bottom: 14px; }
.page-row > div { min-width: 0; }
.page-previews { display: grid; gap: 20px; margin-top: 20px; }
.page-preview { border-top: var(--rule); padding-top: 16px; min-width: 0; }
.page-preview h3 { overflow-wrap: anywhere; margin-bottom: 12px; }
.page-preview img { display: block; width: 100%; height: auto; max-height: 560px; object-fit: contain; background: var(--paper); margin-bottom: 12px; }
.page-meta { font-size: .82rem; color: var(--muted); overflow-wrap: anywhere; }
details { margin-top: 10px; }
summary { font-size: .9rem; cursor: pointer; min-height: 44px; padding: 10px 0; }
.transcript { font-size: .9rem; margin-top: 8px; white-space: pre-wrap; overflow-wrap: anywhere; }
.selection-box { border-left: 3px solid var(--blue); padding: 0 0 0 16px; margin-bottom: 22px; }
.selection-box .hint:last-child { margin-bottom: 0; }
.selection-box ol { padding-left: 21px; margin: 7px 0; }
.selection-box li { font-size: .9rem; margin: 5px 0; overflow-wrap: anywhere; }
.selection-box strong { font-family: ui-monospace, monospace; }
.source-lock { font-size: .82rem; overflow-wrap: anywhere; }
.source-lock p { margin-top: 8px; }
.subheading, .json-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: 22px 0 12px; }
.json-heading .muted { font-size: .8rem; text-align: right; }
.json-heading label { font-size: .95rem; margin: 0; }
.line { padding: 15px; border: var(--rule); margin-bottom: 12px; min-width: 0; }
.line-heading { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.line-heading h4 { font-size: .85rem; }
.line-actions { display: flex; flex-wrap: wrap; gap: 4px; }
.line-actions button { padding: 8px; }
.line .field-pair { margin: 12px 0; }
.line .field-pair:last-child { margin-bottom: 0; }
.action-summary { font: .8rem ui-monospace, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.code-editor { font: .8rem/1.6 ui-monospace, SFMono-Regular, Consolas, monospace; background: var(--surface); tab-size: 2; min-height: 260px; overflow-wrap: normal; white-space: pre; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.file-label { position: relative; overflow: hidden; margin: 0; }
.file-label:focus-within { outline: 3px solid var(--blue); outline-offset: 3px; }
.file-label input { position: absolute; opacity: 0; inset: 0; padding: 0; cursor: pointer; width: 100%; height: 100%; }
.production { border-top: var(--rule); padding-top: 20px; margin-top: 22px; }
.status { font-size: .9rem; overflow-wrap: anywhere; white-space: pre-line; }
.status:not(:empty) { padding: 10px 12px; border-left: 3px solid var(--green); margin-top: 12px; }
.status.error:not(:empty) { color: var(--ink); border-color: var(--red); }
#retry { margin-top: 12px; }
.jobs-panel { margin-top: 24px; }
.jobs-panel > .subheading { margin: 0; }
.jobs-panel .section-heading { margin: 0; }
.jobs { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); gap: 14px; margin-top: 16px; }
.job { border: var(--rule); padding: 16px; min-width: 0; overflow-wrap: anywhere; }
.job h3 { font-size: .9rem; }
.job p { margin: 8px 0; font-size: .9rem; white-space: pre-wrap; }
.job a { display: inline-flex; align-items: center; min-height: 44px; padding: 8px; color: var(--ink); text-underline-offset: .18em; }
.job-stage { font-family: var(--display); }
progress { width: 100%; accent-color: var(--blue); }
noscript { display: block; padding: 24px; }
@media (max-width: 900px) { .workspace { grid-template-columns: 1fr; } }
@media (max-width: 540px) {
  .masthead, main { padding: 20px 16px; }
  .masthead { align-items: flex-start; flex-direction: column; gap: 12px; }
  .masthead::after { left: 16px; }
  .panel { padding: 17px; }
  .field-pair { grid-template-columns: minmax(0, 1fr); }
  .line-heading { align-items: flex-start; flex-direction: column; }
  .jobs-panel > .subheading { align-items: flex-start; flex-wrap: wrap; }
  .toolbar > * { flex: 1 1 auto; }
  input, select, textarea:not(.code-editor) { font-size: 1rem; }
}