:root {
  color-scheme: light dark;
  --page: #f2f5f2;
  --surface: #ffffff;
  --surface-soft: #f7f9f7;
  --surface-strong: #e8eeea;
  --ink: #18201c;
  --muted: #68736c;
  --line: #d8dfda;
  --accent: #176b4a;
  --accent-soft: #dceee5;
  --accent-ink: #0f5137;
  --warning: #9a640b;
  --warning-soft: #fff3d7;
  --danger: #a33a3a;
  --danger-soft: #fde9e7;
  --shadow: 0 18px 55px rgba(32, 50, 40, 0.08);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 8% 3%, rgba(23, 107, 74, 0.1), transparent 25rem),
    var(--page);
  color: var(--ink);
}

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

button {
  cursor: pointer;
}

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

.demo-shell {
  width: min(1440px, calc(100% - 40px));
  margin: 0 auto;
  padding: 38px 0 60px;
}

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.page-intro {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.secondary-button,
.primary-button {
  min-height: 42px;
  border-radius: 11px;
  padding: 0 17px;
  font-weight: 700;
}

.secondary-button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

.primary-button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
}

.safety-note {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--line));
  border-radius: 14px;
  padding: 12px 16px;
  background: color-mix(in srgb, var(--accent-soft) 60%, var(--surface));
  color: var(--accent-ink);
}

.safety-note > span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
}

.safety-note p {
  margin: 0;
  line-height: 1.55;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.75fr) minmax(560px, 1.55fr);
  gap: 20px;
  align-items: start;
}

.configuration-panel,
.preview-section,
.parser-section {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.configuration-panel {
  padding: 22px;
}

.experiment-panel {
  display: grid;
  gap: 20px;
}

.preview-section,
.parser-section {
  padding: 22px;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.section-heading > span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 12px;
  font-weight: 800;
}

.section-heading h2 {
  margin: 0;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.compact-heading {
  margin-top: 28px;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.field {
  display: grid;
  gap: 7px;
}

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

.field > span,
.intent-alias-field > span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.field small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-soft);
  color: var(--ink);
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

input,
select {
  min-height: 40px;
  padding: 0 11px;
}

textarea {
  resize: vertical;
  padding: 12px;
  line-height: 1.6;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
}

.capability-editor {
  display: grid;
  gap: 12px;
}

.capability-definition {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.capability-definition:first-child {
  border-top: 0;
  padding-top: 0;
}

.capability-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.capability-title strong {
  font-size: 14px;
}

.capability-title code {
  color: var(--muted);
  font-size: 11px;
}

.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}

.toggle-label input {
  width: 16px;
  min-height: 16px;
  accent-color: var(--accent);
}

.intent-list {
  display: grid;
  gap: 9px;
}

.intent-alias-field {
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: center;
  gap: 8px;
}

.intent-alias-field input {
  min-height: 36px;
  font-size: 12px;
}

.schema-details {
  margin-top: 20px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.schema-details summary {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

pre {
  overflow: auto;
  margin: 12px 0 0;
  border-radius: 12px;
  padding: 15px;
  background: #17231d;
  color: #d8e6dd;
  font: 12px/1.65 "SFMono-Regular", Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 54px;
  padding: 10px 16px;
  color: var(--muted);
  font-size: 12px;
}

.pipeline span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 11px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
}

.pipeline i {
  color: var(--accent);
  font-style: normal;
}

.device-card {
  position: relative;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent) 16%, var(--line));
  border-radius: 18px;
  padding: 20px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 70%, var(--surface)), var(--surface) 52%);
}

.device-card::after {
  position: absolute;
  right: -50px;
  top: -70px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  content: "";
}

.device-card-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.device-identity {
  display: flex;
  align-items: center;
  gap: 12px;
}

.device-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 15px;
  background: var(--accent);
  color: #fff;
  font-size: 22px;
}

.device-identity h3 {
  margin: 0 0 4px;
  font-size: 21px;
}

.device-identity p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.connection-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-ink);
}

.connection-state i,
.result-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.readout-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.readout-grid div {
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: 12px;
  padding: 12px;
  background: color-mix(in srgb, var(--surface) 84%, transparent);
}

.readout-grid span,
.card-control span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.readout-grid strong {
  font-size: 16px;
}

.card-controls {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.card-control input,
.card-control select {
  background: color-mix(in srgb, var(--surface) 88%, transparent);
}

.card-control output {
  float: right;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
}

.card-control input[type="range"] {
  min-height: auto;
  padding: 0;
  accent-color: var(--accent);
}

.card-footnote {
  position: relative;
  z-index: 1;
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.example-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.example-row button,
.text-button {
  border: 0;
  background: transparent;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.example-row button {
  border-radius: 999px;
  padding: 7px 10px;
  background: var(--accent-soft);
}

.command-composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: stretch;
}

.command-composer textarea {
  min-height: 64px;
}

.result-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0;
  border-radius: 13px;
  padding: 13px 15px;
  background: var(--surface-soft);
}

.result-banner[data-status="success"] {
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.result-banner[data-status="warning"] {
  background: var(--warning-soft);
  color: var(--warning);
}

.result-banner[data-status="error"] {
  background: var(--danger-soft);
  color: var(--danger);
}

.result-banner[data-status="warning"] .result-dot {
  background: var(--warning);
}

.result-banner[data-status="error"] .result-dot {
  background: var(--danger);
}

.result-banner strong {
  display: block;
  margin-bottom: 3px;
  font-size: 14px;
}

.result-banner p {
  margin: 0;
  font-size: 12px;
  line-height: 1.55;
}

.result-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.85fr) minmax(280px, 1.15fr);
  gap: 14px;
}

.trace-panel,
.payload-panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 15px;
}

.trace-panel h3,
.payload-heading h3 {
  margin: 0;
  font-size: 14px;
}

.trace-panel ol {
  display: grid;
  gap: 12px;
  margin: 15px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: trace;
}

.trace-panel li {
  position: relative;
  min-height: 30px;
  padding-left: 34px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
  counter-increment: trace;
}

.trace-panel li::before {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--ink);
  content: counter(trace);
  font-size: 11px;
  font-weight: 800;
}

.trace-panel li[data-state="success"]::before {
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.trace-panel li[data-state="error"]::before {
  background: var(--danger-soft);
  color: var(--danger);
}

.trace-panel li strong {
  display: block;
  color: var(--ink);
}

.payload-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.payload-panel pre {
  min-height: 216px;
  max-height: 360px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #111713;
    --surface: #19211c;
    --surface-soft: #202923;
    --surface-strong: #29342d;
    --ink: #edf4ef;
    --muted: #a4b1a8;
    --line: #354139;
    --accent: #58b98a;
    --accent-soft: #243f32;
    --accent-ink: #bdebd3;
    --warning: #f2c873;
    --warning-soft: #463b23;
    --danger: #f0a09a;
    --danger-soft: #4b2928;
    --shadow: 0 18px 55px rgba(0, 0, 0, 0.22);
  }

  .primary-button,
  .device-icon,
  .safety-note > span {
    color: #102019;
  }
}

@media (max-width: 980px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .demo-shell {
    width: min(100% - 24px, 1440px);
    padding-top: 24px;
  }

  .page-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .pipeline {
    justify-content: flex-start;
    overflow-x: auto;
  }

  .pipeline span {
    white-space: nowrap;
  }

  .field-grid,
  .card-controls,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .field-wide {
    grid-column: auto;
  }

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

  .command-composer {
    grid-template-columns: 1fr;
  }
}