: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: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  color: #fff; font-weight: 800; background: 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;
}
.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; }
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; }
}