.studio-workspace {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.studio-library {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 16px;
  max-height: calc(100vh - 112px);
  overflow: auto;
}

.studio-library-head,
.studio-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.studio-library-head {
  align-items: baseline;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.studio-library-head .meta,
.studio-panel-head .meta {
  margin: 3px 0 0;
}

.studio-editor-shell,
#studio-composer-view {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.studio-panel h3 {
  margin: 0;
  font-size: 17px;
}

.studio-panel > .form-grid,
.studio-panel-head + .form-grid,
#studio-activation-fields {
  margin-top: 14px;
}

.studio-item-description {
  grid-column: 1 / -1;
}

.studio-view-switch button {
  min-width: 86px;
}

.studio-history-actions button {
  min-width: 82px;
}

.studio-sync-badge {
  align-self: center;
  white-space: nowrap;
}

.studio-sync-badge.dirty {
  color: var(--warning);
  background: var(--warning-soft);
}

.studio-sync-badge.invalid {
  color: var(--danger);
  background: var(--danger-soft);
}

.studio-notice {
  margin: 10px 254px 0;
  min-height: 22px;
}

.studio-declarations {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

.studio-definition-list {
  display: grid;
  gap: 9px;
  margin-top: 13px;
}

.studio-definition {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  padding: 10px;
}

.studio-definition-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.studio-definition-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.studio-definition-actions button,
.studio-icon-button {
  min-width: 32px;
  min-height: 30px;
  padding: 3px 8px;
}

.studio-empty {
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 14px;
  text-align: center;
  font-size: 13px;
}

.studio-effect-toolbar {
  align-items: end;
}

.studio-add-effect {
  display: flex;
  gap: 7px;
  align-items: center;
  min-width: min(460px, 48%);
}

.studio-add-effect select {
  min-width: 230px;
}

.studio-effect-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 14px;
  align-items: start;
  margin-top: 15px;
}

.studio-effect-stack {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.studio-effect-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--field);
  overflow: hidden;
  box-shadow: 0 1px 0 var(--soft-shadow);
}

.studio-effect-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--accent);
}

.studio-effect-card.invalid::before {
  background: var(--danger);
}

.studio-effect-summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 11px;
  align-items: center;
  padding: 11px 11px 11px 14px;
  cursor: pointer;
  user-select: none;
}

.studio-effect-index {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--accent-strong);
  background: var(--panel-soft);
  font-size: 12px;
  font-weight: 800;
}

.studio-effect-title {
  min-width: 0;
}

.studio-effect-title strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.studio-effect-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 5px;
}

.studio-chip {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  border-radius: 999px;
  background: var(--neutral-chip);
  color: var(--muted);
  padding: 2px 7px;
  font-size: 11px;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.studio-chip.bucket {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.studio-effect-chevron {
  color: var(--muted);
  font-size: 18px;
  transition: transform 120ms ease;
}

.studio-effect-card.open .studio-effect-chevron {
  transform: rotate(180deg);
}

.studio-effect-body {
  display: none;
  border-top: 1px solid var(--line);
  padding: 14px;
  background: var(--panel-detail);
}

.studio-effect-card.open .studio-effect-body {
  display: block;
}

.studio-effect-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 11px;
}

.studio-effect-grid .wide,
.studio-parameter-grid .wide {
  grid-column: 1 / -1;
}

.studio-subhead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  border-top: 1px solid var(--line);
  margin-top: 15px;
  padding-top: 13px;
}

.studio-subhead h4 {
  margin: 0;
  font-size: 14px;
}

.studio-parameter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.studio-parameter {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--field);
  padding: 9px;
}

.studio-parameter.disabled {
  background: var(--panel-disabled);
}

.studio-parameter-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 7px;
  min-height: 24px;
  margin-bottom: 7px;
}

.studio-parameter-head strong {
  overflow-wrap: anywhere;
  font-size: 12px;
}

.studio-parameter-head .required {
  color: var(--danger);
}

.studio-optional-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.studio-optional-toggle input,
.studio-check-row input,
.studio-multi-option input {
  width: auto;
  min-height: auto;
}

.studio-check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
}

.studio-multi-select {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.studio-multi-option {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--field);
  color: var(--text);
  padding: 5px 8px;
  font-size: 11px;
  font-weight: 600;
}

.studio-value-editor {
  display: grid;
  grid-template-columns: minmax(92px, 0.36fr) minmax(0, 1fr);
  gap: 6px;
}

.studio-value-editor textarea {
  min-height: 68px;
}

.studio-condition {
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--field);
  padding: 9px;
}

.studio-condition-head {
  display: flex;
  gap: 7px;
  align-items: center;
}

.studio-condition-head select {
  max-width: 210px;
}

.studio-condition-body {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.studio-condition-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 100px minmax(0, 1fr);
  gap: 7px;
  align-items: start;
}

.studio-condition-child {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px;
  padding-left: 14px;
}

.studio-condition-child::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: 2px;
  background: var(--line);
}

.studio-condition-add {
  justify-self: start;
}

.studio-effect-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  border-top: 1px solid var(--line);
  margin-top: 15px;
  padding-top: 12px;
}

.studio-effect-order {
  display: flex;
  gap: 6px;
}

.studio-resolution-stack {
  position: sticky;
  top: 88px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  padding: 11px;
}

.studio-resolution-stack h4 {
  margin: 0 0 3px;
}

.studio-resolution-stack > .meta {
  margin-bottom: 10px;
}

.studio-resolution-group + .studio-resolution-group {
  margin-top: 10px;
}

.studio-resolution-bucket {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.studio-resolution-rule {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 7px;
  align-items: center;
  width: 100%;
  border: 0;
  border-left: 2px solid var(--accent);
  border-radius: 0 5px 5px 0;
  background: var(--field);
  text-align: left;
  margin-top: 4px;
  padding: 6px 7px;
}

.studio-resolution-rule:hover {
  background: var(--panel-hover);
}

.studio-resolution-priority {
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 800;
}

.studio-resolution-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
}

#studio-yaml-view textarea {
  min-height: 680px;
  margin-top: 12px;
  line-height: 1.45;
  tab-size: 2;
}

.studio-invalid-message {
  color: var(--danger);
  font-size: 11px;
  margin-top: 6px;
}

.studio-highlight {
  animation: studio-highlight 1.1s ease;
}

.snackbar-region {
  position: fixed;
  z-index: 1000;
  right: 20px;
  bottom: 20px;
  display: grid;
  gap: 9px;
  width: min(390px, calc(100vw - 32px));
  pointer-events: none;
}

.snackbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 9px;
  background: #183b33;
  color: #fff;
  box-shadow: 0 12px 34px rgba(17, 38, 32, 0.24);
  padding: 11px 12px;
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: auto;
}

.snackbar.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.snackbar.leaving {
  opacity: 0;
  transform: translateY(7px) scale(0.98);
}

.snackbar.error {
  background: #7d2929;
}

.snackbar.info {
  background: #263f57;
}

.snackbar-icon {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  font-size: 13px;
  font-weight: 800;
}

.snackbar-message {
  min-width: 0;
  font-size: 13px;
  font-weight: 650;
  line-height: 1.35;
}

.snackbar-dismiss {
  width: 28px;
  min-width: 28px;
  min-height: 28px;
  border: 0;
  color: inherit;
  background: transparent;
  padding: 0;
  font-size: 18px;
}

.snackbar-dismiss:hover {
  border: 0;
  background: rgba(255, 255, 255, 0.1);
}

@keyframes studio-highlight {
  0%, 100% { box-shadow: 0 1px 0 var(--soft-shadow); }
  35% { box-shadow: 0 0 0 3px var(--highlight-ring); }
}

@media (max-width: 1050px) {
  .studio-workspace { grid-template-columns: 200px minmax(0, 1fr); }
  .studio-effect-layout { grid-template-columns: minmax(0, 1fr); }
  .studio-resolution-stack { position: static; order: -1; }
  .studio-notice { margin-right: 214px; }
}

@media (max-width: 760px) {
  .studio-workspace,
  .studio-declarations { grid-template-columns: minmax(0, 1fr); }
  .studio-library { position: static; max-height: none; }
  .studio-notice { margin: 10px 0 0; }
  .studio-effect-toolbar { align-items: stretch; }
  .studio-add-effect { min-width: 0; width: 100%; flex-direction: column; }
  .studio-add-effect select,
  .studio-add-effect button { width: 100%; }
  .studio-effect-grid,
  .studio-parameter-grid,
  .studio-definition-grid { grid-template-columns: minmax(0, 1fr); }
  .studio-condition-compare { grid-template-columns: minmax(0, 1fr); }
  .studio-value-editor { grid-template-columns: minmax(0, 1fr); }
  .snackbar-region { right: 16px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .snackbar,
  .studio-highlight,
  .studio-effect-chevron {
    animation: none;
    transition: none;
  }
}