:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --line: #d9dee7;
  --text: #161a22;
  --muted: #667085;
  --accent: #0f766e;
  --danger: #b42318;
  --shadow: 0 12px 30px rgba(20, 26, 38, 0.08);
}

* {
  box-sizing: border-box;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  min-height: 40px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  font-weight: 650;
  padding: 0 14px;
}

button.ghost {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
}

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

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 11px;
  background: #ffffff;
  color: var(--text);
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  letter-spacing: 0;
}

h2 {
  font-size: 1.05rem;
  letter-spacing: 0;
}

.shell {
  width: min(1440px, calc(100vw - 48px));
  margin: 0 auto;
  padding: 34px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.topbar p {
  color: var(--muted);
  margin-top: 5px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.panel.narrow {
  max-width: 430px;
}

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

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}

.tab {
  min-height: 38px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
}

.tab.active {
  border-color: var(--accent);
  background: #e6f4f1;
  color: #0b5f59;
}

.viewPanel {
  display: block;
}

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

.check {
  display: flex;
  align-items: center;
  gap: 10px;
}

.check input {
  width: auto;
}

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

.metric {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 1.65rem;
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.72fr);
  gap: 18px;
  margin-top: 18px;
}

.builderHeader {
  margin-bottom: 18px;
}

.builderControls,
.endpointForm {
  display: grid;
  align-items: end;
  gap: 14px;
}

.builderControls {
  grid-template-columns: minmax(320px, 1fr) auto auto auto;
}

.endpointForm {
  grid-template-columns: minmax(220px, 1.2fr) 120px minmax(240px, 1.2fr) 120px;
}

.endpointUrlPanel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 14px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.endpointUrlField input {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  overflow-wrap: anywhere;
}

.endpointTester {
  display: grid;
  gap: 14px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.testerHeader,
.testerGrid {
  display: grid;
  gap: 14px;
}

.testerHeader {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.testerGrid {
  grid-template-columns: minmax(220px, 1fr) minmax(180px, 0.75fr) minmax(260px, 1fr) auto;
  align-items: end;
}

.testBodyField textarea,
.testResponse {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.45;
}

.testResponse {
  min-height: 120px;
  max-height: 260px;
  overflow: auto;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #101828;
  color: #ffffff;
  padding: 14px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.builderGrid {
  display: grid;
  grid-template-columns: minmax(340px, 0.36fr) minmax(0, 1fr);
  gap: 18px;
}

.builderPanel {
  min-width: 0;
}

.builderWorkspace {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
  margin-top: 22px;
}

.palette {
  display: grid;
  align-content: start;
  gap: 10px;
  border-right: 1px solid var(--line);
  padding-right: 18px;
}

.palette button {
  width: 100%;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
  text-align: left;
}

.canvasWrap {
  min-width: 0;
}

.canvasHeader {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.builderCanvas {
  display: grid;
  gap: 12px;
  min-height: 360px;
  border: 1px dashed #aeb8c8;
  border-radius: 8px;
  background: #fbfcfd;
  padding: 14px;
}

.builderCanvas.dragOver {
  border-color: var(--accent);
  background: #f0fdfa;
}

.builderBlock {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  padding: 14px;
}

.builderBlock.dragging {
  opacity: 0.54;
}

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

.blockHandle {
  color: var(--muted);
  cursor: grab;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.blockFields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

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

.compact {
  gap: 10px;
}

.endpointItem {
  cursor: pointer;
}

.endpointItem.active {
  border-color: var(--accent);
  background: #f0fdfa;
}

.compactButton {
  min-height: 32px;
  padding: 0 10px;
  font-size: 0.86rem;
}

.methodPill {
  display: inline-grid;
  place-items: center;
  min-width: 58px;
  border-radius: 6px;
  background: #e6f4f1;
  color: #0b5f59;
  font-size: 0.78rem;
  font-weight: 760;
  padding: 4px 7px;
}

.manifestBox {
  display: grid;
  gap: 12px;
  margin-top: 22px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.manifestBox textarea,
.builderBlock textarea {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.45;
}

.dangerButton {
  color: var(--danger);
}

.list,
.table {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.row {
  display: grid;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px;
}

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

.rowActions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.muted {
  color: var(--muted);
  font-size: 0.88rem;
}

.token {
  overflow-wrap: anywhere;
  border-radius: 6px;
  background: #f2f4f7;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
}

.danger {
  color: var(--danger);
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(420px, calc(100vw - 36px));
  border-radius: 8px;
  background: #101828;
  color: #ffffff;
  padding: 13px 15px;
  box-shadow: var(--shadow);
}

@media (max-width: 820px) {
  .topbar,
  .grid,
  .builderGrid,
  .builderControls,
  .endpointForm,
  .endpointUrlPanel,
  .testerGrid,
  .builderWorkspace {
    grid-template-columns: 1fr;
  }

  .palette {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-right: 0;
    padding-bottom: 14px;
  }

  .topbar {
    align-items: flex-start;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .shell {
    width: min(100vw - 24px, 1440px);
    padding-top: 22px;
  }

  .metrics {
    grid-template-columns: 1fr;
  }
}