.oa-main { position: relative; padding: 118px 0 96px; }
.oa-main .wrap { max-width: 1040px; }
.oa-back { display: inline-block; margin-bottom: 44px; color: var(--gold-dim); font: 500 12px/1.4 var(--font-mono); letter-spacing: .04em; text-decoration: none; }
.oa-back:hover, .oa-back:focus-visible { color: var(--gold); }
.oa-intro { max-width: 760px; margin-bottom: 60px; }
.oa-eyebrow, .oa-panel-label, .oa-engine-label { color: var(--gold-dim); font: 500 11px/1.5 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; }
.oa-intro h1 { margin: 15px 0 20px; color: var(--ink); font: 600 clamp(32px, 4.8vw, 54px)/1.14 var(--font-display); }
.oa-intro > p:last-child { max-width: 65ch; color: var(--ink-2); font-size: 17px; line-height: 1.7; }
.oa-layout { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: start; gap: 56px; }
.oa-workflow h2, .oa-panel h2, .oa-results h2, .oa-help h2 { color: var(--ink); font: 600 clamp(21px, 2.5vw, 28px)/1.25 var(--font-display); }
.oa-workflow h2 { margin-bottom: 28px; }
.oa-steps { list-style: none; border-top: 1px solid var(--hair); }
.oa-steps li { display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--hair-2); }
.oa-step-number { color: var(--gold-dim); font: 500 12px/1.6 var(--font-mono); }
.oa-steps h3 { margin-bottom: 8px; color: var(--ink); font-size: 16px; font-weight: 600; }
.oa-steps p, .oa-panel-copy, .oa-file-help, .oa-help p { color: var(--ink-2); font-size: 14px; line-height: 1.65; }
.oa-steps code, .oa-retry-note code, .oa-help code { color: var(--gold); font: 500 .95em var(--font-mono); }
.oa-panel { padding: clamp(24px, 3vw, 36px); border: 1px solid var(--hair); border-radius: var(--r-lg); background: var(--bg-2); box-shadow: var(--shadow-2); }
.oa-panel h2 { margin: 8px 0 12px; }
.oa-panel-copy { margin-bottom: 24px; }
.oa-sign-in { padding: 14px 16px; border: 1px solid var(--hair); border-radius: var(--r-sm); background: var(--hair-2); color: var(--ink-2); font-size: 14px; line-height: 1.5; }
.oa-sign-in a, .oa-help a { color: var(--gold); text-underline-offset: 3px; }
.oa-file-label { display: block; margin: 28px 0 10px; color: var(--ink); font-size: 14px; font-weight: 600; }
.oa-file-label span { color: var(--ink-3); font-weight: 400; }
.oa-panel input[type=file] { display: block; width: 100%; padding: 14px; border: 1px dashed var(--gold-dim); border-radius: var(--r-md); background: var(--bg-socket); color: var(--ink); font: 14px var(--font-body); cursor: pointer; }
.oa-panel input[type=file]:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.oa-panel input[type=file]::file-selector-button { margin-right: 12px; padding: 7px 12px; border: 1px solid var(--hair); border-radius: var(--r-sm); background: var(--bg-2); color: var(--ink); font: 600 13px var(--font-body); cursor: pointer; }
.oa-file-help { margin-top: 12px; }
.oa-file-name { margin-top: 10px; color: var(--gold-dim); font: 500 11px/1.5 var(--font-mono); overflow-wrap: anywhere; }
.oa-submit { display: inline-flex; margin-top: 24px; cursor: pointer; }
.oa-submit:disabled { cursor: wait; opacity: .65; }
.oa-status { min-height: 1.5em; margin-top: 16px; color: var(--ink-2); font-size: 14px; line-height: 1.5; }
.oa-status[data-error] { color: var(--danger-text); }
.oa-results { margin-top: 64px; padding: 32px; border: 1px solid var(--hair); border-radius: var(--r-lg); background: var(--bg-2); }
.oa-results-heading { display: flex; justify-content: space-between; gap: 24px; align-items: end; padding-bottom: 22px; border-bottom: 1px solid var(--hair); }
.oa-results-heading h2 { margin-top: 8px; }
.oa-results-summary { max-width: 38ch; color: var(--ink-2); font-size: 14px; line-height: 1.5; text-align: right; }
.oa-engine-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 22px; }
.oa-engine { min-height: 155px; padding: 22px; border: 1px solid var(--hair); border-radius: var(--r-md); background: var(--bg); }
.oa-engine[data-status=issued] { border-color: var(--success); }
.oa-engine[data-status=error] { border-color: var(--danger-text); }
.oa-engine h3 { margin: 4px 0 14px; color: var(--ink); font: 600 20px/1.25 var(--font-display); }
.oa-engine-status { color: var(--ink); font-size: 14px; font-weight: 600; }
.oa-engine[data-status=issued] .oa-engine-status { color: var(--success); }
.oa-engine[data-status=error] .oa-engine-status { color: var(--danger-text); }
.oa-engine-detail { margin-top: 5px; color: var(--ink-2); font-size: 13px; line-height: 1.5; }
.oa-result-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.oa-retry-note { max-width: 50ch; color: var(--ink-2); font-size: 13px; line-height: 1.5; }
.oa-help { max-width: 760px; margin-top: 76px; padding-top: 32px; border-top: 1px solid var(--hair); }
.oa-help p { margin-top: 12px; }
.oa-brand-links { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 20px; }
.oa-brand-links a { color: var(--gold); font-size: 13px; font-weight: 600; text-decoration: underline; text-underline-offset: 4px; }
.oa-footer { border-top: 1px solid var(--hair-2); }
.oa-footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 28px 0; }
.oa-footer .brand-mark { font-size: 13px; }
.oa-footer-inner > div { display: flex; flex-wrap: wrap; gap: 18px; }
.oa-footer-inner > div a { color: var(--ink-3); font-size: 12px; text-decoration: none; }
.oa-footer-inner > div a:hover { color: var(--gold); }
@media (max-width: 760px) {
  .oa-main { padding: 96px 0 64px; }
  .oa-back { margin-bottom: 28px; }
  .oa-intro { margin-bottom: 40px; }
  .oa-layout, .oa-engine-grid { grid-template-columns: 1fr; }
  .oa-layout { gap: 36px; }
  .oa-results { margin-top: 42px; padding: 22px; }
  .oa-results-heading { display: block; }
  .oa-results-summary { margin-top: 12px; text-align: left; }
  .oa-help { margin-top: 54px; }
  .oa-footer-inner { display: block; }
  .oa-footer-inner > div { margin-top: 16px; }
}