:root {
  --blue: #1565c0;
  --blue-dark: #0d3f78;
  --blue-soft: #eef6ff;
  --ink: #172033;
  --muted: #5f6b7a;
  --border: #d9e1eb;
  --surface: #ffffff;
  --page: #f4f7fb;
  --good: #18794e;
  --good-soft: #eaf7f0;
  --bad: #b42318;
  --bad-soft: #fff0ee;
  --warn: #9a6700;
  --warn-soft: #fff7dc;
  --shadow: 0 12px 34px rgba(24, 54, 92, .08);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.5;
}
button, input, select, textarea { font: inherit; }
.topbar {
  min-height: 78px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4vw;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand-mark {
  width: 50px; height: 50px; border-radius: 14px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, #f8fcff, #d9efff);
  border: 1px solid #b6d9f6;
  box-shadow: 0 6px 16px rgba(21,101,192,.12);
  overflow: hidden;
}
.brand-mark svg { width: 44px; height: 44px; display: block; }
.cloud-mark { color: var(--blue); }
.brand-title { font-weight: 800; font-size: 18px; }
.brand-subtitle { color: var(--muted); font-size: 13px; }
.stage-pill {
  background: var(--blue-soft); color: var(--blue-dark);
  border: 1px solid #bdd8f6; border-radius: 999px;
  padding: 7px 12px; font-weight: 700; font-size: 13px;
}
.shell { width: min(1240px, 92vw); margin: 0 auto; }
.hero {
  display: flex; justify-content: space-between; gap: 32px; align-items: flex-end;
  padding: 55px 0 26px;
}
h1 { font-size: clamp(32px, 5vw, 50px); line-height: 1.08; margin: 0 0 14px; max-width: 850px; }
h2 { font-size: 28px; margin: 0; }
h3 { font-size: 21px; margin: 0; }
.lead { font-size: 18px; color: var(--muted); max-width: 880px; margin: 0; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; color: var(--blue); font-weight: 800; font-size: 12px; margin: 0 0 6px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.safety-banner {
  background: #eff8ff; border: 1px solid #b9daf7; border-left: 5px solid var(--blue);
  padding: 14px 18px; border-radius: 10px; margin-bottom: 42px;
}
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 17px; }
.endpoint-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 38px; }
.endpoint-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 19px; box-shadow: 0 4px 16px rgba(24,54,92,.04);
  text-align: left; min-height: 174px; width: 100%; color: inherit;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
button.endpoint-card { cursor: pointer; }
button.endpoint-card:hover, button.endpoint-card:focus-visible { transform: translateY(-2px); border-color: #8ab9e9; box-shadow: var(--shadow); outline: none; }
.endpoint-card.selected { border: 2px solid var(--blue); background: #fbfdff; }
.endpoint-card.disabled { opacity: .68; background: #f8fafc; }
.card-top { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 18px; }
.method { display: inline-block; color: #fff; background: var(--blue); font-weight: 800; font-size: 12px; border-radius: 6px; padding: 4px 8px; }
.method.pending { background: #6b7280; }
.card-path { font-family: Consolas, monospace; color: var(--blue-dark); font-weight: 700; }
.status-tag { font-size: 11px; border-radius: 999px; padding: 4px 8px; font-weight: 800; }
.status-tag.ready { color: var(--good); background: var(--good-soft); }
.status-tag.pending { color: #5c6470; background: #edf0f3; }
.endpoint-card h3 { margin-bottom: 7px; }
.endpoint-card p { margin: 0; color: var(--muted); font-size: 14px; }
.workspace { margin-bottom: 40px; }
.workspace-header {
  display: flex; justify-content: space-between; gap: 20px; align-items: flex-start;
  background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 22px;
  margin-bottom: 16px;
}
.method-path { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.method-path code { font-size: 15px; color: var(--blue-dark); }
.workspace-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.two-column { display: grid; grid-template-columns: 1.4fr .8fr; gap: 16px; }
.panel { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 22px; box-shadow: 0 4px 18px rgba(24,54,92,.04); }
.panel-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 700; font-size: 14px; }
.required { color: var(--bad); }
.field small { color: var(--muted); min-height: 38px; }
.input, .select, textarea {
  border: 1px solid #bac6d4; border-radius: 8px; padding: 10px 12px; background: #fff; color: var(--ink);
}
.input:focus, .select:focus, textarea:focus { outline: 3px solid #d7eaff; border-color: var(--blue); }
textarea {
  width: 100%; min-height: 390px; resize: vertical; font-family: Consolas, "Courier New", monospace; line-height: 1.45;
  tab-size: 2; white-space: pre;
}

.mode-tabs { display: inline-flex; border: 1px solid #9fb8d3; border-radius: 10px; overflow: hidden; margin-bottom: 14px; background: #fff; }
.mode-tab { appearance: none; border: 0; padding: 10px 14px; background: #fff; color: var(--blue-dark); font-weight: 800; cursor: pointer; }
.mode-tab.active { background: var(--blue); color: #fff; }
.mode-tab:not(.active):hover { background: var(--blue-soft); }
.input-section { margin-top: 6px; }
textarea.request-text { min-height: 145px; }

.upload-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.file-note { color: var(--muted); font-size: 13px; }
.button-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 18px; }
.button {
  appearance: none; border: 1px solid transparent; border-radius: 8px; padding: 10px 15px;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; cursor: pointer;
}
.button.primary { color: #fff; background: var(--blue); }
.button.primary:hover { background: #0f55a2; }
.button.secondary { color: var(--blue-dark); border-color: #9fb8d3; background: #fff; }
.button.secondary:hover { background: var(--blue-soft); }
.button:disabled { cursor: not-allowed; opacity: .55; }
.code-box {
  background: #101827; color: #e8eef8; min-height: 180px; border-radius: 10px;
  padding: 16px; overflow: auto; white-space: pre-wrap; word-break: break-word;
  font-family: Consolas, "Courier New", monospace;
}
.results-panel { margin-top: 16px; }
.results-top { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.result-badge { padding: 9px 14px; border-radius: 999px; font-weight: 900; }
.result-badge.pass { background: var(--good-soft); color: var(--good); }
.result-badge.fail { background: var(--bad-soft); color: var(--bad); }
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 18px 0; }
.summary-card { border: 1px solid var(--border); border-radius: 10px; padding: 13px; }
.summary-card strong { display: block; font-size: 25px; }
.issue-section { margin-top: 22px; }
.issue-list { display: grid; gap: 10px; }
.issue { border-radius: 10px; padding: 14px; border-left: 5px solid; }
.issue.error { background: var(--bad-soft); border-color: var(--bad); }
.issue.warning { background: var(--warn-soft); border-color: var(--warn); }
.issue h4 { margin: 0 0 6px; }
.issue dl { display: grid; grid-template-columns: 135px 1fr; margin: 0; gap: 3px 10px; font-size: 14px; }
.issue dt { font-weight: 800; }
.issue dd { margin: 0; overflow-wrap: anywhere; }
.check-list { display: grid; gap: 8px; margin-top: 18px; }
.check { display: grid; grid-template-columns: 90px 1fr; border-bottom: 1px solid var(--border); padding: 8px 0; }
.check-status { font-weight: 900; }
.check-status.Pass { color: var(--good); }
.check-status.Fail { color: var(--bad); }
.checkbox-row { display: flex; align-items: center; gap: 9px; margin-top: 22px; font-weight: 700; }
.checkbox-row input { width: 18px; height: 18px; }
.hidden { display: none !important; }
.error-inline { color: var(--bad); background: var(--bad-soft); border: 1px solid #f1b9b3; padding: 10px; border-radius: 8px; margin-top: 10px; }

.health-test-panel {
  margin-top: 18px;
  border: 1px solid #b9daf7;
  background: #f7fbff;
  border-radius: 12px;
  padding: 16px;
}
.health-test-panel h4 { margin: 0 0 8px; font-size: 18px; }
.health-url-box {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  margin: 10px 0;
}
.health-url-box code {
  background: #101827; color: #e8eef8; border-radius: 8px; padding: 10px 12px;
  overflow-wrap: anywhere;
}
.connectivity-result {
  margin-top: 10px; padding: 12px; border-radius: 10px; border-left: 5px solid #6b7280;
  background: #f3f4f6;
}
.connectivity-result.pass { background: var(--good-soft); border-color: var(--good); color: #0b5132; }
.connectivity-result.fail { background: var(--bad-soft); border-color: var(--bad); color: #842019; }
.connectivity-result.unknown { background: var(--warn-soft); border-color: var(--warn); color: #6b4700; }

footer { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; padding: 24px 0 38px; border-top: 1px solid var(--border); }
@media (max-width: 930px) {
  .endpoint-grid { grid-template-columns: repeat(2, 1fr); }
  .two-column { grid-template-columns: 1fr; }
  .workspace-header, .hero { flex-direction: column; align-items: stretch; }
  .workspace-actions { justify-content: flex-start; }
}
@media (max-width: 620px) {
  .topbar { padding: 10px 4vw; }
  .stage-pill { display: none; }
  .endpoint-grid, .form-grid, .summary-grid { grid-template-columns: 1fr; }
  .shell { width: 94vw; }
  .hero { padding-top: 32px; }
  .panel, .workspace-header { padding: 16px; }
  footer { flex-direction: column; gap: 6px; }
  .issue dl { grid-template-columns: 1fr; }
}

/* V1.4 — The EDI Cloud API University */
.university-topbar {
  min-height: 124px;
  background: #07111f;
  border-bottom-color: #12345d;
  padding-top: 8px;
  padding-bottom: 8px;
}
.university-brand { display: flex; align-items: center; gap: 18px; min-width: 0; }
.university-logo {
  width: min(520px, 54vw);
  height: 104px;
  object-fit: contain;
  object-position: center;
  display: block;
  border-radius: 12px;
  border: 1px solid #164c88;
  box-shadow: 0 8px 26px rgba(0,94,255,.22);
}
.brand-copy { color: #fff; }
.brand-kicker { font-size: 13px; color: #b7d8ff; font-weight: 700; }
.brand-version { font-size: 14px; margin-top: 5px; color: #fff; font-weight: 800; }
.university-topbar .stage-pill { background: #0e2c50; color: #e5f2ff; border-color: #275b91; }
.university-hero { padding-top: 44px; }
.course-map { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-bottom: 30px; }
.course-series-card {
  background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 20px;
  box-shadow: 0 5px 20px rgba(24,54,92,.05);
}
.course-series-heading { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 14px; }
.course-series-heading h3 { margin: 0 0 4px; }
.course-series-heading p { margin: 0; color: var(--muted); font-size: 14px; }
.series-number {
  min-width: 74px; padding: 7px 9px; border-radius: 9px; text-align: center;
  background: #0d3f78; color: #fff; font-weight: 900; font-family: Consolas, monospace;
}
.lesson-chip-list { display: grid; gap: 8px; }
.lesson-chip {
  border: 1px solid #c6d5e5; background: #f9fbfe; color: var(--ink); border-radius: 10px;
  padding: 10px 12px; display: grid; grid-template-columns: 52px 1fr auto; gap: 10px;
  align-items: center; text-align: left; cursor: pointer;
}
.lesson-chip strong { color: var(--blue); font-family: Consolas, monospace; font-size: 16px; }
.lesson-chip span { font-weight: 700; }
.lesson-chip em { font-style: normal; font-size: 11px; background: #edf0f3; color: #5c6470; padding: 3px 7px; border-radius: 999px; }
.lesson-chip:hover, .lesson-chip:focus-visible { border-color: var(--blue); background: var(--blue-soft); outline: none; }
.lesson-chip.selected { border: 2px solid var(--blue); background: #edf6ff; }
.lesson-chip.planned { background: #f5f6f8; color: #687383; }
.direct-access-section { margin: 10px 0 36px; }
.direct-access-section details { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; }
.direct-access-section summary { cursor: pointer; font-weight: 800; color: var(--blue-dark); }
.direct-access-section .endpoint-grid { margin: 18px 0 5px; }
.lesson-progress-bar {
  display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center;
  background: #0b2442; color: #fff; border-radius: 14px; padding: 12px 14px; margin-bottom: 14px;
}
.lesson-current { display: flex; flex-wrap: wrap; gap: 9px; justify-content: center; align-items: center; text-align: center; }
.lesson-number { font-family: Consolas, monospace; font-weight: 900; color: #8fcbff; }
.lesson-goal-box { margin-top: 12px; padding: 11px 13px; background: #eef6ff; border-left: 4px solid var(--blue); border-radius: 8px; }
.special-lesson-panel { margin-bottom: 16px; }
.lesson-instruction-grid { display: grid; grid-template-columns: 1fr 220px; gap: 24px; align-items: center; margin-bottom: 20px; }
.live-test-actions { display: flex; gap: 9px; flex-wrap: wrap; margin: 14px 0 9px; }
.live-url { display: block; padding: 10px 12px; border-radius: 8px; background: #101827; color: #e8eef8; overflow-wrap: anywhere; }
.expected-result-box { background: #eaf7f0; border: 1px solid #b8e0ca; border-radius: 14px; padding: 22px; text-align: center; }
.expected-result-box span { display: block; color: var(--muted); font-weight: 700; }
.expected-result-box strong { display: block; font-size: 54px; line-height: 1; color: var(--good); margin: 7px 0; }
.expected-result-box small { color: #0b5132; }
.compact-textarea { min-height: 130px !important; }
.help-details { margin-top: 17px; border: 1px solid #d8e1eb; border-radius: 10px; padding: 11px 14px; background: #fbfcfe; }
.help-details summary { cursor: pointer; font-weight: 800; color: var(--blue-dark); }
.help-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 13px; }
.help-grid > div { border: 1px solid var(--border); border-radius: 9px; padding: 11px; background: #fff; }
.help-grid p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.lesson-continue-row { justify-content: flex-end; border-top: 1px solid var(--border); padding-top: 16px; }
.planned-panel { border: 2px dashed #a7b3c2; background: #fbfcfe; }
.compact-banner { margin: 16px 0; }

@media (max-width: 930px) {
  .course-map { grid-template-columns: 1fr; }
  .lesson-instruction-grid { grid-template-columns: 1fr; }
  .expected-result-box { max-width: 280px; }
  .university-logo { width: min(430px, 64vw); height: 92px; }
  .brand-copy { display: none; }
}
@media (max-width: 620px) {
    .university-topbar { min-height: 82px; }
  .university-logo { width: 290px; height: 72px; }
  .lesson-progress-bar { grid-template-columns: 1fr; }
  .lesson-progress-bar .button { width: 100%; }
  .help-grid { grid-template-columns: 1fr; }
  .lesson-chip { grid-template-columns: 48px 1fr; }
  .lesson-chip em { grid-column: 2; justify-self: start; }
}

/* V1.5 — JSON-first University instructions */
.quick-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
  margin: 2px 0 14px;
}
.quick-steps > div {
  display: flex;
  align-items: center;
  gap: 9px;
  border: 1px solid #c9d9e9;
  background: #f7fbff;
  border-radius: 10px;
  padding: 10px 11px;
  font-size: 13px;
  line-height: 1.25;
}
.quick-steps strong {
  display: inline-flex;
  width: 27px;
  height: 27px;
  min-width: 27px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-family: Consolas, monospace;
}
.request-format-note {
  margin: 0 0 14px;
  padding: 11px 13px;
  border-left: 4px solid #1467bd;
  border-radius: 8px;
  background: #edf6ff;
  color: #173b63;
  font-size: 14px;
  line-height: 1.45;
}
.request-format-note code { background: #dcecff; padding: 1px 4px; border-radius: 4px; }
@media (max-width: 760px) {
  .quick-steps { grid-template-columns: 1fr; }
}


/* V1.6 — TEST account authentication and real API testing */
.api-key-panel {
  margin: 20px 0 30px;
  padding: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(360px, .75fr);
  gap: 24px;
  background: #fff;
  border: 1px solid #b9cee3;
  border-radius: 16px;
  box-shadow: 0 5px 20px rgba(24,54,92,.05);
}
.api-key-panel h2 { margin: 3px 0 8px; }
.api-key-panel code { background:#edf6ff; padding:2px 5px; border-radius:5px; }
.api-key-input-row { display:flex; gap:8px; align-items:center; }
.api-key-input { width:100%; font-family:Consolas,"Courier New",monospace; }
.compact-row { margin-top:10px; }
.api-key-status { margin-top:11px; padding:11px 12px; border-radius:9px; font-weight:800; border-left:5px solid #8794a3; background:#f3f5f7; }
.api-key-status.test { color:#0b5132; background:var(--good-soft); border-color:var(--good); }
.api-key-status.live { color:#842019; background:var(--bad-soft); border-color:var(--bad); }
.lesson-key-row { flex-wrap:wrap; margin-bottom:10px; }
.lesson-key-row .api-key-input { flex:1 1 420px; }
.health-response-preview { margin-top:14px; }
.compact-code { min-height:80px; margin-top:8px; }
.live-test-result-panel { margin-top:22px; border-top:4px solid #1670ca; }
.live-test-heading h3 { margin:3px 0 10px; }
.test-confirmed-box, .live-block-box { display:flex; flex-wrap:wrap; gap:10px; align-items:center; padding:12px 14px; border-radius:10px; margin:10px 0; }
.test-confirmed-box { background:var(--good-soft); border:1px solid #b8e0ca; color:#0b5132; }
.test-confirmed-box strong { font-size:17px; }
.test-confirmed-box span { font-weight:700; }
.live-block-box { background:var(--bad-soft); border:1px solid #f1b9b3; color:#842019; }
.live-block-box strong { font-size:17px; }
.live-response-code { margin-top:12px; min-height:120px; max-height:520px; }
#live-api-response { margin-top:14px; }
.test-key-lesson code { background:#edf6ff; padding:2px 5px; border-radius:5px; }
@media (max-width: 900px) {
  .api-key-panel { grid-template-columns:1fr; }
}


/* V1.8 — remembered TEST-account values for guided 400/500/600/700 lessons */
.remembered-values-panel {
  margin: 0 0 14px;
  padding: 12px 13px;
  border: 1px solid #b8e0ca;
  border-left: 4px solid var(--good);
  border-radius: 10px;
  background: #eef9f3;
  color: #0b5132;
}
.remembered-heading { display:flex; justify-content:space-between; gap:12px; align-items:flex-start; }
.remembered-heading strong { display:block; font-size:15px; }
.remembered-heading small { display:block; margin-top:3px; color:#3f6655; line-height:1.35; }
.remembered-chip-row { display:flex; flex-wrap:wrap; gap:7px; margin-top:10px; }
.remembered-chip-row span { display:inline-flex; gap:5px; padding:6px 9px; border:1px solid #b8e0ca; border-radius:999px; background:#fff; font-size:13px; color:#174c35; }
.remembered-applied { margin-top:8px; font-size:13px; font-weight:800; color:#0a6c42; }
.compact-button { padding:7px 10px; white-space:nowrap; }
.remembered-result-note { margin-top:10px; padding:9px 11px; border-radius:8px; background:#eef9f3; border:1px solid #b8e0ca; color:#174c35; font-size:13px; }
@media (max-width: 650px) { .remembered-heading { flex-direction:column; } }