:root {
  color-scheme: dark;
  --background: #161616;
  --layer: #262626;
  --layer-2: #393939;
  --field: #262626;
  --border: #525252;
  --border-strong: #6f6f6f;
  --text: #f4f4f4;
  --text-muted: #c6c6c6;
  --text-subtle: #8d8d8d;
  --blue: #0f62fe;
  --blue-hover: #0353e9;
  --green: #42be65;
  --red: #fa4d56;
  --focus: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
}

.topbar {
  min-height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: #0f0f0f;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  margin-top: 0.25rem;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 400;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 1rem;
  font-weight: 400;
}

.eyebrow {
  color: var(--text-subtle);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.health {
  min-width: 9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--layer);
  border-left: 3px solid var(--text-subtle);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.health.ok {
  border-color: var(--green);
}

.health.error {
  border-color: var(--red);
}

.dot {
  width: 0.5rem;
  height: 0.5rem;
  background: currentColor;
  border-radius: 50%;
}

.shell {
  display: grid;
  grid-template-columns: minmax(18rem, 24rem) 1fr;
  min-height: calc(100vh - 5rem);
}

.panel {
  padding: 1.5rem;
}

.config-panel {
  background: var(--layer);
  border-right: 1px solid var(--border);
}

.work-panel {
  background: var(--background);
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.section-heading span {
  color: var(--blue);
  font-size: 0.75rem;
}

.field,
.field-grid {
  display: grid;
  gap: 0.5rem;
}

.field {
  margin-bottom: 1rem;
}

.field-grid {
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.field span {
  color: var(--text-muted);
  font-size: 0.75rem;
}

input,
select,
textarea,
button {
  width: 100%;
  border: 0;
  border-radius: 0;
  font: inherit;
}

input,
select,
textarea {
  background: var(--field);
  color: var(--text);
  border-bottom: 1px solid var(--border-strong);
  padding: 0.875rem 1rem;
  outline: 2px solid transparent;
  outline-offset: -2px;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible {
  outline-color: var(--focus);
}

textarea {
  min-height: 13rem;
  resize: vertical;
  line-height: 1.5;
}

.button-stack {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.button {
  min-height: 3rem;
  padding: 0 1rem;
  text-align: left;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.button.primary {
  background: var(--blue);
  color: #ffffff;
}

.button.primary:hover:not(:disabled) {
  background: var(--blue-hover);
}

.button.secondary {
  background: var(--layer-2);
  color: var(--text);
}

.button.secondary:hover:not(:disabled),
.button.ghost:hover:not(:disabled) {
  background: #4c4c4c;
}

.button.ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.result-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin: 1.5rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

#summary {
  color: var(--text-subtle);
  font-size: 0.875rem;
}

.responses {
  display: grid;
  gap: 1rem;
}

.response-card {
  min-height: 9rem;
  background: var(--layer);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue);
}

.response-card.empty {
  display: grid;
  place-items: center;
  color: var(--text-subtle);
}

.response-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
}

.response-title {
  font-size: 0.875rem;
}

.response-meta {
  color: var(--text-subtle);
  font-size: 0.75rem;
  white-space: nowrap;
}

.response-body {
  padding: 1rem;
  white-space: pre-wrap;
  line-height: 1.55;
}

@media (max-width: 860px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem;
  }

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

  .config-panel {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

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