.config-viewer {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.97);
  border: 1px solid var(--border-light);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  z-index: 2500;
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  display: flex;
  flex-direction: column;
}

.config-viewer.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.config-header {
  padding: 12px 16px;
  background: rgba(30, 41, 59, 0.6);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.config-title {
  font-weight: 800;
}

.config-subtitle {
  font-size: 0.8rem;
  color: var(--text-mute);
}

.config-tabs {
  display: flex;
  gap: 8px;
  padding: 10px 16px 4px 16px;
  border-bottom: 1px solid var(--border-light);
  flex-wrap: wrap;
}

.config-tab {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  cursor: pointer;
  font-weight: 700;
  transition: background 0.2s ease, transform 0.2s ease, color 0.2s ease;
}

.config-tab:hover {
  transform: translateY(-1px);
}

.config-tab.active {
  background: var(--c-radius);
  color: #0f172a;
  border-color: transparent;
}

.config-tab.readonly {
  border-style: dashed;
  opacity: 0.85;
}

.config-editor-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  box-sizing: border-box;
}

.config-highlight {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 12px 16px 20px 16px;
  overflow: auto;
  pointer-events: none;
  white-space: pre;
  z-index: 0;
  tab-size: 2;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.5 !important;
  word-break: normal;
  box-sizing: border-box;
}

.config-content {
  position: absolute;
  inset: 0;
  background: transparent;
  color: transparent;
  caret-color: #e2e8f0;
  z-index: 1;
  padding: 12px 16px 20px 16px;
  overflow: auto;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.5 !important;
  tab-size: 2;
  white-space: pre;
  word-break: normal;
  box-sizing: border-box;
  color: transparent;
  border: 0;
  outline: none;
  resize: none;
}

.config-content::selection {
  background: rgba(59, 130, 246, 0.35);
}

.config-editor-wrap .hljs {
  background: transparent;
  color: #e2e8f0;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  line-height: 1.5 !important;
  tab-size: 2;
}

.config-editor-wrap .hljs * {
  font-family: inherit;
  line-height: inherit;
}

.config-highlight code {
  display: block;
  min-height: 100%;
}

.config-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.config-warning {
  font-size: 0.8rem;
  color: #fbbf24;
  margin-left: 6px;
}

.config-status-row {
  padding: 6px 16px 0 16px;
  color: var(--text-mute);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  min-height: 28px;
}

.config-status.error {
  color: #fca5a5;
}

/* Builder UI Styles */
.config-builder-ui {
  display: flex;
  flex-direction: column;
  flex: 1;
  background: var(--bg-dark);
  overflow: hidden;
  padding: 0;
}

.builder-tabs-internal {
  display: flex;
  gap: 0;
  background: rgba(0,0,0,0.2);
  border-bottom: 1px solid var(--border-light);
}

.builder-tab {
  padding: 10px 16px;
  background: transparent;
  color: var(--text-mute);
  border: none;
  border-right: 1px solid var(--border-light);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s;
}

.builder-tab:hover {
  background: rgba(255,255,255,0.03);
  color: var(--text-main);
}

.builder-tab.active {
  background: rgba(59, 130, 246, 0.1);
  color: var(--c-radius);
  border-bottom: 2px solid var(--c-radius);
}

.builder-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

.build-form {
  display: none;
  flex-direction: column;
  gap: 15px;
  animation: fadeIn 0.3s ease;
}

.build-form.active {
  display: flex;
}

.form-row {
  display: flex;
  gap: 15px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  color: var(--text-mute);
  font-weight: 600;
}

.req { color: #fca5a5; }

.form-group input, .form-group select, .form-group textarea {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border-light);
  padding: 10px;
  border-radius: 6px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.9rem;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--c-radius);
}

.full-width { width: 100%; }

.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: rgba(0,0,0,0.2);
  border-radius: 6px;
  border: 1px solid var(--border-light);
}

.sm-btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-light);
  color: var(--text-mute);
  cursor: pointer;
  border-radius: 4px;
  font-size: 0.8rem;
}
.sm-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-main); }

.builder-status {
  margin-top: 20px;
  padding: 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  text-align: center;
  display: none;
}
.builder-status.success { background: rgba(16, 185, 129, 0.1); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.builder-status.error { background: rgba(239, 68, 68, 0.1); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }

/* Mini Color Picker */
.color-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.color-picker-tiny {
    width: 36px;
    height: 36px;
    padding: 0;
    border: 1px solid var(--border-light);
    background: none;
    cursor: pointer;
    border-radius: 4px;
}

/* Sim Node Builder */
.sim-node-builder {
    border: 1px solid var(--border-light);
    border-radius: 6px;
    padding: 10px;
    background: rgba(0,0,0,0.2);
}
.sim-node-input-row {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}
.sim-nodes-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.sim-node-item {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #bfdbfe;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
}
.sim-node-item i { cursor: pointer; opacity: 0.7; }
.sim-node-item i:hover { opacity: 1; color: #fff; }

/* Doc Block Builder */
.doc-blocks-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 15px;
}
.doc-block-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-light);
    padding: 15px;
    border-radius: 6px;
    position: relative;
}
.doc-block-remove {
    position: absolute;
    top: 10px;
    right: 10px;
    background: transparent;
    border: none;
    color: var(--text-mute);
    cursor: pointer;
}
.doc-block-remove:hover { color: #fca5a5; }