.structure-builder-app {
  --szb-glass-blur: var(--glass-card-blur, 20px);
  --szb-button-blur: var(--glass-button-blur, 16px);
  --szb-glass-opacity: var(--glass-opacity-strong, 0.44);
  --szb-panel: rgba(7, 16, 21, var(--szb-glass-opacity));
  --szb-panel-solid: var(--glass-solid-bg-strong, #0a151b);
  --szb-panel-soft: rgba(255, 255, 255, 0.024);
  --szb-accent: var(--accent-colour, #7ac5d6);
  --szb-accent-rgb: var(--accent-rgb, 122, 197, 214);
  --szb-accent-soft: rgba(var(--szb-accent-rgb), 0.15);
  --szb-accent-gradient: linear-gradient(135deg, rgba(var(--szb-accent-rgb), 0.15), rgba(var(--szb-accent-rgb), 0.05));
  --szb-border: var(--szb-accent);
  --szb-border-strong: color-mix(in srgb, var(--szb-accent) 86%, #ffffff 14%);
  --szb-shadow: 0 16px 42px rgba(0, 0, 0, 0.3), 0 0 10px 0 var(--szb-accent), 0 0 18px color-mix(in srgb, var(--szb-accent) 12%, transparent);
  --szb-row: rgba(255, 255, 255, 0.028);
  --szb-row-hover: color-mix(in srgb, var(--szb-accent) 7%, transparent);
  margin-top: clamp(1.4rem, 3vw, 2.5rem);
  font-size: 0.86rem;
  scroll-margin-top: 6rem;
}

.structure-builder-boundary {
  max-width: 76rem;
  margin: 0 auto 0.6rem;
  padding: 0.58rem 0.75rem;
  border: 1px solid rgba(255, 209, 102, 0.22);
  background: rgba(255, 209, 102, 0.055);
  color: var(--soft);
  font-size: 0.76rem;
  line-height: 1.42;
}

.structure-builder-boundary strong {
  display: block;
  margin-bottom: 0.18rem;
  color: var(--amber);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
}

.structure-builder-shell {
  display: grid;
  grid-template-columns: minmax(220px, 0.68fr) minmax(560px, 1.7fr) minmax(238px, 0.72fr);
  gap: 1px;
  max-width: 76rem;
  margin: 0 auto;
  border: 2px solid var(--szb-border);
  background: rgba(191, 239, 255, 0.11);
  box-shadow: var(--szb-shadow);
  scroll-margin-top: 6rem;
}

.structure-builder-panel {
  -webkit-backdrop-filter: blur(var(--szb-glass-blur)) saturate(var(--glass-saturation, 1.08));
  backdrop-filter: blur(var(--szb-glass-blur)) saturate(var(--glass-saturation, 1.08));
  min-width: 0;
  max-height: min(78vh, 46rem);
  overflow: auto;
  padding: 0.68rem;
  border: 2px solid var(--szb-border);
  background:
    var(--szb-accent-gradient),
    linear-gradient(145deg, rgba(255, 255, 255, 0.04), transparent 48%),
    linear-gradient(125deg, var(--szb-accent-soft), transparent 58%),
    var(--szb-panel);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.editor-panel {
  display: grid;
  grid-template-rows: auto auto auto minmax(16rem, 1fr);
}

.structure-panel-heading {
  margin-bottom: 0.5rem;
}

.structure-panel-heading p {
  margin: 0 0 0.2rem;
  color: var(--cyan);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.58rem;
  text-transform: uppercase;
}

.structure-panel-heading h2 {
  margin: 0;
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(0.9rem, 1vw, 1.05rem);
  line-height: 1.16;
}

.structure-help-text,
.structure-status {
  margin: 0 0 0.48rem;
  color: var(--soft);
  font-size: 0.72rem;
  line-height: 1.38;
}

.structure-field-group {
  display: grid;
  gap: 0.26rem;
  margin-bottom: 0.52rem;
}

.structure-field-group label,
.structure-toggle,
.structure-editor-toolbar label {
  color: var(--soft);
  font-size: 0.66rem;
  font-weight: 700;
}

.structure-field-group input,
.structure-field-group select,
.structure-field-group textarea,
.structure-editor-toolbar input,
.structure-editor-toolbar select,
.structure-node-name input {
  width: 100%;
  border: 1px solid var(--szb-border);
  border-radius: 4px;
  background: rgba(3, 6, 9, 0.76);
  color: var(--text);
  font: inherit;
}

.structure-field-group input,
.structure-field-group select,
.structure-editor-toolbar input,
.structure-editor-toolbar select {
  min-height: 1.72rem;
  padding: 0.32rem 0.42rem;
}

.structure-field-group textarea {
  min-height: 6.25rem;
  resize: vertical;
  padding: 0.45rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  line-height: 1.36;
}

.structure-inline-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.32rem;
}

.starter-panel .structure-inline-control {
  grid-template-columns: 1fr;
}

.structure-syntax-options {
  display: grid;
  gap: 0.22rem;
  padding: 0.38rem;
  border: 1px solid rgba(155, 229, 255, 0.12);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.025);
}

.structure-syntax-options label,
.structure-toggle.compact {
  display: flex;
  align-items: center;
  gap: 0.34rem;
  margin: 0;
  color: var(--soft);
  font-size: 0.64rem;
  line-height: 1.22;
}

.structure-syntax-options input,
.structure-toggle input {
  box-sizing: border-box;
  width: 0.86rem !important;
  min-width: 0.86rem !important;
  height: 0.86rem !important;
  min-height: 0 !important;
  padding: 0 !important;
  margin: 0;
  accent-color: var(--green);
}

.structure-action-row,
.structure-node-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.28rem;
}

.structure-builder-app button {
  -webkit-backdrop-filter: blur(var(--szb-button-blur)) saturate(var(--glass-saturation, 1.08));
  backdrop-filter: blur(var(--szb-button-blur)) saturate(var(--glass-saturation, 1.08));
  min-height: 1.72rem;
  border: 2px solid var(--szb-border);
  border-radius: 4px;
  background:
    var(--szb-accent-gradient),
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.038) 58%, rgba(0, 0, 0, 0.17)),
    linear-gradient(135deg, var(--szb-accent-soft), rgba(255, 255, 255, 0.025)),
    rgba(7, 16, 21, var(--glass-opacity, 0.38));
  box-shadow:
    0 10px 26px rgba(0, 0, 0, 0.28),
    0 0 10px 0 var(--szb-accent),
    0 0 14px color-mix(in srgb, var(--szb-accent) 8%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.14);
  color: var(--text);
  cursor: pointer;
  font: 700 0.64rem/1 "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  letter-spacing: 0;
  transition:
    background 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    color 0.18s ease,
    filter 0.18s ease;
}

.structure-builder-app button:not(:disabled) {
  padding: 0.36rem 0.46rem;
}

.structure-builder-app button:hover:not(:disabled),
.structure-builder-app button:focus-visible {
  border-color: var(--szb-border-strong);
  background:
    var(--szb-accent-gradient),
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.056) 58%, rgba(0, 0, 0, 0.15)),
    linear-gradient(135deg, color-mix(in srgb, var(--szb-accent) 20%, transparent), rgba(255, 255, 255, 0.036)),
    rgba(7, 18, 23, var(--glass-opacity-strong, 0.44));
  box-shadow:
    0 14px 34px rgba(0, 0, 0, 0.32),
    0 0 10px 0 var(--szb-accent),
    0 0 20px color-mix(in srgb, var(--szb-accent) 14%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
  color: var(--szb-accent);
}

.structure-builder-app button:focus-visible {
  outline: 2px solid var(--szb-accent);
  outline-offset: 3px;
}

.structure-builder-app button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
  padding: 0.36rem 0.46rem;
}

.no-transparency .structure-builder-panel,
.no-transparency .structure-builder-app button {
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  background:
    var(--szb-accent-gradient),
    var(--szb-panel-solid);
  border-color: var(--szb-accent);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.32), 0 0 10px 0 var(--szb-accent);
  color: var(--text);
}

@media (prefers-reduced-transparency: reduce) {
  .structure-builder-panel,
  .structure-builder-app button {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background:
      var(--szb-accent-gradient),
      var(--szb-panel-solid);
    border-color: var(--szb-accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.32), 0 0 10px 0 var(--szb-accent);
    color: var(--text);
  }
}

@media (forced-colors: active) {
  .structure-builder-panel {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: Canvas;
    border-color: CanvasText;
    box-shadow: none;
    color: CanvasText;
  }

  .structure-builder-app button {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: ButtonFace;
    border-color: ButtonText;
    box-shadow: none;
    color: ButtonText;
  }

  .structure-builder-app button:focus-visible {
    outline: 2px solid Highlight;
  }
}

.structure-editor-toolbar {
  display: grid;
  gap: 0.3rem;
  margin-bottom: 0.42rem;
  padding: 0.42rem;
  border: 1px solid rgba(155, 229, 255, 0.13);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.024);
}

.structure-command-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 0.32rem;
  align-items: end;
}

.structure-command-view {
  grid-template-columns: minmax(9rem, 1fr) repeat(2, auto);
  align-items: end;
}

.structure-command-numbering {
  grid-template-columns: minmax(10rem, 1fr) auto;
  align-items: center;
}

.structure-editor-toolbar label {
  display: grid;
  gap: 0.16rem;
  min-width: 0;
}

.structure-editor-toolbar button,
.structure-editor-toolbar input,
.structure-editor-toolbar select {
  min-height: 1.62rem;
  font-size: 0.66rem;
}

.structure-tree-shell {
  min-height: 0;
  max-height: min(48vh, 31rem);
  overflow: auto;
  border: 1px solid rgba(155, 229, 255, 0.13);
  border-radius: 5px;
  background: rgba(3, 6, 9, 0.42);
}

.structure-tree,
.structure-tree ol {
  display: grid;
  gap: 0;
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.structure-tree ol {
  padding-left: 0.65rem;
  border-left: 1px solid rgba(155, 229, 255, 0.11);
}

.structure-tree-item {
  min-width: 0;
}

.structure-tree-row {
  display: grid;
  grid-template-columns: 1.1rem 1.2rem 2.35rem minmax(7rem, 1fr) 1.15rem auto;
  gap: 0.2rem;
  align-items: center;
  min-width: 0;
  min-height: 1.72rem;
  padding: 0.12rem 0.22rem;
  border-bottom: 1px solid rgba(155, 229, 255, 0.09);
  background: var(--szb-row);
}

.structure-tree-row:hover,
.structure-tree-row:focus-within {
  background: var(--szb-row-hover);
}

.structure-tree-row.is-drop-target {
  box-shadow: inset 0 0 0 1px rgba(114, 255, 102, 0.65);
  background: rgba(114, 255, 102, 0.08);
}

.structure-drag-handle,
.structure-disclosure,
.structure-disclosure-spacer,
.structure-node-icon,
.structure-child-count {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.54rem;
  text-transform: uppercase;
  white-space: nowrap;
}

.structure-drag-handle {
  cursor: grab;
  opacity: 0.72;
  user-select: none;
}

.structure-drag-handle:active {
  cursor: grabbing;
}

.structure-disclosure {
  width: 1.1rem;
  min-height: 1.1rem;
  padding: 0;
  border-color: rgba(155, 229, 255, 0.13);
  background: transparent;
  font-size: 0.66rem;
}

.structure-disclosure-spacer {
  min-height: 1px;
}

.structure-node-icon {
  color: var(--cyan);
}

.is-file .structure-node-icon {
  color: var(--amber);
}

.structure-node-name input {
  min-height: 1.32rem;
  padding: 0.18rem 0.3rem;
  border-color: rgba(155, 229, 255, 0.1);
  background: rgba(0, 0, 0, 0.18);
  font-size: 0.7rem;
  line-height: 1.1;
}

.structure-node-name input:focus {
  border-color: var(--szb-border-strong);
  outline: none;
}

.structure-child-count {
  text-align: right;
  opacity: 0.78;
}

.structure-node-actions {
  flex-wrap: nowrap;
  justify-content: flex-end;
  gap: 0.16rem;
}

.structure-node-actions button {
  min-height: 1.18rem;
  padding: 0.16rem 0.24rem;
  border-color: rgba(155, 229, 255, 0.12);
  background: rgba(0, 217, 255, 0.035);
  font-size: 0.54rem;
}

.structure-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.1);
}

.structure-stat-grid div {
  display: grid;
  gap: 0.12rem;
  padding: 0.42rem;
  background: rgba(3, 6, 9, 0.62);
}

.structure-stat-grid span {
  color: var(--muted);
  font-size: 0.56rem;
  text-transform: uppercase;
}

.structure-stat-grid strong {
  color: var(--green);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
}

.structure-toggle {
  display: flex;
  align-items: center;
  gap: 0.34rem;
  margin: 0 0 0.38rem;
  line-height: 1.25;
}

.structure-messages {
  display: grid;
  gap: 0.2rem;
  margin: 0.48rem 0;
  padding: 0.46rem;
  border: 1px solid rgba(155, 229, 255, 0.14);
  background: rgba(255, 255, 255, 0.035);
  color: var(--soft);
  font-size: 0.7rem;
  line-height: 1.32;
}

.structure-messages strong {
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.structure-messages ul {
  display: grid;
  gap: 0.16rem;
  margin: 0;
  padding-left: 1rem;
}

.structure-messages.has-errors {
  border-color: rgba(255, 111, 111, 0.38);
  background: rgba(255, 111, 111, 0.07);
}

.structure-messages.has-warnings {
  border-color: rgba(255, 209, 102, 0.3);
  background: rgba(255, 209, 102, 0.065);
}

.structure-messages.is-ready {
  border-color: rgba(114, 255, 102, 0.26);
  background: rgba(114, 255, 102, 0.055);
}

.structure-path-preview {
  max-height: 12rem;
  margin: 0;
  overflow: auto;
  border: 1px solid rgba(155, 229, 255, 0.14);
  border-radius: 4px;
  background: rgba(3, 6, 9, 0.72);
  color: var(--soft);
  padding: 0.45rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.62rem;
  line-height: 1.35;
  white-space: pre-wrap;
  word-break: break-word;
}

.export-actions button:first-child {
  border-color: var(--szb-border-strong);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.055) 58%, rgba(0, 0, 0, 0.16)),
    linear-gradient(135deg, rgba(191, 239, 255, 0.2), rgba(255, 255, 255, 0.035)),
    rgba(4, 10, 14, 0.58);
}

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

@media (max-width: 1180px) {
  .structure-builder-shell {
    grid-template-columns: minmax(220px, 0.72fr) minmax(480px, 1.28fr);
  }

  .export-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .structure-builder-shell,
  .structure-command-line,
  .structure-command-view {
    grid-template-columns: 1fr;
  }

  .export-panel {
    grid-column: auto;
  }

  .structure-builder-panel {
    max-height: none;
  }

  .structure-tree-shell {
    max-height: min(58vh, 30rem);
  }

  .structure-tree-row {
    min-width: 32rem;
  }

  .structure-inline-control {
    grid-template-columns: 1fr;
  }
}