:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #334155;
  --text-strong: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --control-bg: #eef2f7;
  --code-bg: #111827;
  --code-text: #d1fae5;
  --accent: #0f766e;
  --focus: rgba(15, 118, 110, 0.16);
  --shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
}

button,
textarea {
  font-family: inherit;
}

button:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.app-shell {
  min-height: 100svh;
  background:
    linear-gradient(180deg, rgba(17, 24, 39, 0.04), transparent 320px),
    var(--bg);
  color: var(--text);
}

.workspace {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

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

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 780px;
  margin: 0;
  color: var(--text-strong);
  font-size: 40px;
  line-height: 1.08;
  font-weight: 760;
}

h2,
h3 {
  margin: 0;
  color: var(--text-strong);
}

h2 {
  font-size: 18px;
}

h3 {
  font-size: 14px;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  max-width: 360px;
}

.status-strip span {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  padding: 8px 10px;
}

.view-tabs {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin: 0 0 16px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
}

.view-tabs button {
  min-height: 40px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 760;
  cursor: pointer;
}

.view-tabs button.active {
  background: var(--accent);
  color: white;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
}

.tool-grid {
  display: block;
}

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

.panel-header {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  padding: 0 18px;
}

.actions {
  display: flex;
  gap: 8px;
}

.input-panel {
  padding-bottom: 18px;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 18px;
  padding: 4px;
  border-radius: 8px;
  background: var(--control-bg);
}

.segmented button,
.ghost-button,
.primary-button {
  border: 0;
  border-radius: 6px;
  font: inherit;
  font-weight: 720;
  cursor: pointer;
}

.segmented button {
  min-height: 40px;
  background: transparent;
  color: var(--muted);
}

.segmented button.active {
  background: var(--surface);
  color: var(--text-strong);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.12);
}

.field-label {
  display: block;
  margin: 0 18px 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}

.compact-label {
  margin-top: 18px;
}

textarea {
  box-sizing: border-box;
  width: calc(100% - 36px);
  min-height: 240px;
  margin: 0 18px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--code-bg);
  color: var(--code-text);
  font: 13px/1.55 var(--mono);
  padding: 14px;
}

textarea:focus {
  border-color: var(--accent);
}

.primary-button {
  width: calc(100% - 36px);
  min-height: 46px;
  margin: 16px 18px 0;
  background: var(--accent);
  color: white;
}

.primary-button:disabled,
.ghost-button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.ghost-button {
  min-height: 36px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-strong);
  padding: 0 12px;
}

.file-button {
  display: inline-flex;
  align-items: center;
}

.ghost-button:not(:disabled):hover,
.primary-button:not(:disabled):hover {
  filter: brightness(0.96);
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 18px 0;
}

.options-grid label {
  display: grid;
  gap: 6px;
}

.options-grid span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

.field-help {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

select,
input[type="text"] {
  box-sizing: border-box;
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-strong);
  font: inherit;
  padding: 0 10px;
}

select:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

select:focus,
input[type="text"]:focus {
  border-color: var(--accent);
  outline: 3px solid var(--focus);
}

.error-banner {
  margin: 12px 18px 0;
  border: 1px solid #fecaca;
  border-radius: 8px;
  background: #fef2f2;
  color: #991b1b;
  font-size: 14px;
  padding: 10px 12px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border-bottom: 1px solid var(--border);
  background: var(--border);
}

.stats div {
  background: var(--surface);
  padding: 16px 18px;
}

.stats span,
.stats small {
  display: block;
}

.stats span {
  color: var(--text-strong);
  font-size: 24px;
  font-weight: 780;
  line-height: 1;
}

.stats small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 720;
  text-transform: uppercase;
}

.yaml-preview {
  box-sizing: border-box;
  width: 100%;
  min-height: 420px;
  max-height: 68svh;
  margin: 0;
  resize: vertical;
  overflow: auto;
  background: var(--code-bg);
  color: var(--code-text);
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
  font: 12px/1.55 var(--mono);
  padding: 18px;
  text-align: left;
  white-space: pre;
}

.editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding: 12px 18px;
}

.validation-banner {
  border-top: 1px solid var(--border);
  font-size: 13px;
  padding: 10px 18px;
}

.validation-banner.ok {
  background: #ecfdf5;
  color: #047857;
}

.validation-banner.warning {
  background: #fffbeb;
  color: #92400e;
}

.validation-banner.error {
  background: #fef2f2;
  color: #991b1b;
}

.warnings {
  border-top: 1px solid var(--border);
  padding: 16px 18px 18px;
}

.warnings ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
}

.advanced-panel {
  margin-top: 0;
}

.advanced-panel .panel-header {
  align-items: flex-start;
  min-height: auto;
  padding-top: 14px;
  padding-bottom: 14px;
}

.advanced-panel .actions {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.advanced-panel .actions input,
.advanced-panel .actions select {
  width: 160px;
}

.advanced-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border);
}

.advanced-grid .view-panel.active {
  display: grid;
}

.builder-section {
  min-width: 0;
  background: var(--surface);
  padding: 18px;
}

.builder-section h3 {
  margin-bottom: 12px;
}

.node-list,
#group-list {
  display: grid;
  gap: 12px;
}

.node-row,
.group-row {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fbfdff;
  padding: 12px;
}

.node-row {
  cursor: grab;
}

.node-row-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.row-actions,
.group-form {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.node-fields,
.group-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.node-fields label,
.group-row label,
.builder-section label {
  display: grid;
  gap: 5px;
}

.node-fields span,
.group-row span,
.builder-section label span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

.checkbox-row {
  display: inline-flex !important;
  grid-auto-flow: column;
  align-items: center;
  justify-content: start;
  gap: 8px !important;
  color: var(--text-strong);
  font-size: 13px;
  font-weight: 700;
}

.checkbox-row input {
  width: auto;
}

.compact-editor {
  box-sizing: border-box;
  width: 100%;
  min-height: 112px;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--code-bg);
  color: var(--code-text);
  font: 12px/1.5 var(--mono);
  padding: 10px;
}

.raw-json {
  margin-top: 8px;
}

details {
  margin-top: 12px;
}

summary {
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  font-weight: 760;
}

@media (max-width: 860px) {
  .workspace {
    width: min(100% - 12px, 1180px);
    padding: 8px 0 18px;
  }

  .intro {
    align-items: start;
    display: none;
  }

  h1 {
    font-size: 30px;
  }

  .view-tabs {
    grid-template-columns: repeat(5, minmax(72px, 1fr));
    overflow-x: auto;
    margin-bottom: 8px;
    border-radius: 0 0 8px 8px;
  }

  .view-tabs button {
    min-width: 72px;
    font-size: 12px;
  }

  .status-strip {
    justify-content: flex-start;
    max-width: none;
  }

  .tool-grid {
    display: block;
  }

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

  .advanced-panel .panel-header {
    flex-direction: column;
  }

  .advanced-panel .actions,
  .advanced-panel .actions input,
  .advanced-panel .actions select {
    width: 100%;
  }

  .node-row-head,
  .node-fields,
  .group-row {
    grid-template-columns: 1fr;
  }

  .node-row-head {
    align-items: start;
    flex-direction: column;
  }

  .panel-header {
    padding: 0 14px;
  }

  .segmented,
  .field-label,
  .error-banner,
  .options-grid {
    margin-left: 14px;
    margin-right: 14px;
  }

  textarea,
  .primary-button {
    width: calc(100% - 28px);
    margin-left: 14px;
    margin-right: 14px;
  }

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

  textarea {
    min-height: 180px;
  }

  .yaml-preview {
    min-height: 58svh;
  }

  .stats div {
    padding: 10px 12px;
  }

  .stats span {
    font-size: 20px;
  }

  .editor-actions {
    padding: 10px 14px;
  }

  .builder-section {
    padding: 12px;
  }
}