:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --ink: #172032;
  --muted: #657086;
  --line: #dfe5ef;
  --blue: #2f5fd7;
  --blue-soft: #e9efff;
  --green: #137a53;
  --green-soft: #e6f7ef;
  --yellow: #9a6500;
  --yellow-soft: #fff3d8;
  --red: #b42318;
  --red-soft: #ffebe7;
  --shadow: 0 12px 32px rgba(22, 32, 50, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
a {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.shell {
  max-width: 1380px;
  margin: 0 auto;
  padding: 28px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.eyebrow {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 6px;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.02;
}

h2 {
  margin-bottom: 12px;
  font-size: 18px;
}

.top-actions,
.tabs,
.controls,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ghost-link,
.tab,
.controls button {
  min-height: 38px;
  border-radius: 8px;
  padding: 9px 12px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
}

.ghost-link,
.tab {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

.tab.active {
  border-color: var(--blue);
  background: var(--blue-soft);
  color: var(--blue);
}

.controls {
  margin-top: 18px;
}

.controls button {
  background: var(--blue);
  color: #fff;
}

.controls button.secondary {
  background: var(--blue-soft);
  color: var(--blue);
}

.controls button.warning {
  background: var(--yellow-soft);
  color: var(--yellow);
}

.controls button.danger,
.danger-soft {
  background: var(--red-soft);
  color: var(--red);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 18px;
}

.wide {
  grid-column: 1 / -1;
}

.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.badge,
.pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 9px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.pill.green {
  background: var(--green-soft);
  color: var(--green);
}

.pill.yellow {
  background: var(--yellow-soft);
  color: var(--yellow);
}

.pill.red {
  background: var(--red-soft);
  color: var(--red);
}

.kv {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 9px 12px;
  margin: 0;
  font-size: 13px;
}

.kv dt {
  color: var(--muted);
  font-weight: 800;
}

.kv dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 13px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 9px 8px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

code {
  border-radius: 5px;
  background: #f0f3f8;
  padding: 2px 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.catalog {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.concepts {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.concept-group {
  display: grid;
  gap: 12px;
}

.concept-group > h3 {
  margin: 0;
  color: var(--ink);
  font-size: 16px;
}

.concept-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcff;
  padding: 14px;
}

.concept-card h4 {
  margin: 0 0 8px;
  font-size: 15px;
}

.concept-card p {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.concept-card .concept-note {
  color: var(--ink);
}

.concept-example {
  border-left: 3px solid var(--blue);
  border-radius: 6px;
  background: var(--blue-soft);
  padding: 9px 10px;
}

.concept-example strong {
  color: var(--blue);
}

.field-list {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.field-list li {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 7px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.field-list strong {
  color: var(--ink);
  overflow-wrap: anywhere;
}

.action-explainer {
  border-top: 1px solid var(--line);
  margin-top: 20px;
  padding-top: 18px;
}

.action-explainer h2 {
  margin-bottom: 0;
}

.action-explainer h3 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.action-explainer p {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.55;
}

.explain-grid,
.changes-row {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.explain-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.changes-row {
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
}

#actionChanges,
#actionHistory {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.45;
}

#actionHistory {
  color: var(--muted);
}

.catalog h3 {
  margin: 0 0 8px;
  font-size: 14px;
}

.catalog ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hidden {
  display: none;
}

@media (max-width: 960px) {
  .shell {
    padding: 18px;
  }

  .topbar {
    flex-direction: column;
  }

  .grid,
  .catalog,
  .field-list li,
  .explain-grid,
  .changes-row {
    grid-template-columns: 1fr;
  }
}