style.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: #0d0d1a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #c0c0d0;
  user-select: none;
  font-size: 13px;
}

body.dragging * {
  cursor: col-resize !important;
  pointer-events: none !important;
}

body.dragging #splitter {
  pointer-events: auto !important;
}

/* ── App Layout ────────────────────────────────────────────────────── */

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* ── Header ────────────────────────────────────────────────────────── */

#app-header {
  height: 36px;
  flex-shrink: 0;
  background: linear-gradient(180deg, #0e0e22, #08081a);
  border-bottom: 1px solid #1a1a3a;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  -webkit-app-region: drag;
  position: relative;
}

.brand-btn {
  font-size: 14px;
  font-weight: 600;
  color: #4488ff;
  letter-spacing: 0.5px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 4px;
  font-family: inherit;
  -webkit-app-region: no-drag;
  transition: background 0.1s;
}

.brand-btn:hover {
  background: #1a1a3a;
}


.brand-btn svg {
  width: 10px;
  height: 10px;
  opacity: 0.5;
}

/* ── App Menu Dropdown ─────────────────────────────────────────────── */

#app-menu {
  position: absolute;
  top: 100%;
  left: 8px;
  width: 240px;
  background: #0e0e22;
  border: 1px solid #1a1a3a;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  z-index: 200;
  padding: 4px 0;
  -webkit-app-region: no-drag;
}

#app-menu.hidden {
  display: none;
}

.menu-item {
  display: block;
  width: 100%;
  padding: 7px 14px;
  border: none;
  background: transparent;
  color: #8888bb;
  font-size: 12px;
  text-align: left;
  cursor: pointer;
  transition: background 0.1s;
  font-family: inherit;
}

.menu-item:hover {
  background: #1a1a3a;
  color: #c0c0e0;
}

.menu-shortcut {
  float: right;
  color: #444466;
  font-size: 10px;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
}

.menu-divider {
  height: 1px;
  background: #1a1a3a;
  margin: 4px 0;
}

#app-header .separator {
  width: 1px;
  height: 14px;
  background: #222244;
}

.header-export-group {
  display: flex;
  gap: 2px;
  -webkit-app-region: no-drag;
}

.header-btn {
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid #222244;
  background: rgba(15, 15, 30, 0.8);
  color: #5566aa;
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.1s;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  letter-spacing: 0.5px;
  -webkit-app-region: no-drag;
}

.header-btn:hover {
  background: #1a1a3a;
  color: #8899cc;
  border-color: #333366;
}

.path-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: none;
  color: #444466;
  font-size: 11px;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 500px;
  flex: 1;
  -webkit-app-region: no-drag;
  transition: all 0.1s;
}

.path-btn:hover {
  border-color: #222244;
  background: #0e0e22;
  color: #6677aa;
}

.path-btn svg {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  opacity: 0.5;
}

/* ── Workspace Dropdown ────────────────────────────────────────────── */

#workspace-dropdown {
  position: absolute;
  top: 100%;
  right: 16px;
  left: 200px;
  max-width: 500px;
  background: #0e0e22;
  border: 1px solid #1a1a3a;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  z-index: 200;
  overflow: hidden;
  -webkit-app-region: no-drag;
}

#workspace-dropdown.hidden { display: none; }

.ws-input-row {
  display: flex;
  padding: 8px;
  gap: 6px;
}

.ws-input-row input {
  flex: 1;
  padding: 5px 8px;
  border: 1px solid #222244;
  border-radius: 4px;
  background: #0a0a18;
  color: #b0b0d0;
  font-size: 12px;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  outline: none;
}

.ws-input-row input:focus { border-color: #4466aa; }

.ws-input-row button {
  padding: 5px 12px;
  border-radius: 4px;
  border: 1px solid #333366;
  background: #1a1a3a;
  color: #4488ff;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}

.ws-input-row button:hover {
  background: #222255;
}

.ws-divider { height: 1px; background: #1a1a3a; }

#ws-recent-list, #ws-browser-list {
  max-height: 240px;
  overflow-y: auto;
}

.ws-recent-item, .ws-file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 11px;
  color: #7777aa;
  transition: background 0.1s;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
}

.ws-recent-item:hover, .ws-file-item:hover {
  background: #151538;
  color: #b0b0d0;
}

.ws-file-item.dir { color: #4488ff; }
.ws-file-item.scad { color: #50fa7b; }

#ws-browser-path {
  padding: 6px 12px;
  font-size: 10px;
  color: #444466;
  border-bottom: 1px solid #111130;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
}

#ws-file-browser.hidden { display: none; }

/* ── Main Content ──────────────────────────────────────────────────── */

#main-content {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* ── Left Panel ────────────────────────────────────────────────────── */

#left-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 250px;
  min-height: 0;
}

/* ── Viewports Container ───────────────────────────────────────────── */

#viewports-container {
  flex: 1;
  display: flex;
  min-height: 200px;
}

.viewport-pane {
  flex: 1;
  overflow: hidden;
  background: #10102a;
  position: relative;
  outline: none;
  min-width: 150px;
}

.viewport-pane + .viewport-pane {
  border-left: 2px solid #222244;
}

.viewport-pane.focused {
  box-shadow: inset 0 0 0 1px #4466aa44;
}

.viewport-close-btn {
  position: absolute;
  top: 4px;
  left: 4px;
  z-index: 11;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid #333355;
  background: rgba(10, 10, 26, 0.85);
  color: #666688;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.viewport-close-btn:hover {
  background: rgba(40, 10, 10, 0.9);
  color: #cc4444;
  border-color: #553333;
}

/* ── Viewport 2 Column ─────────────────────────────────────────────── */

.viewport-column {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 200px;
  min-height: 0;
  border-left: 1px solid #1a1a3a;
}

.viewport-column .viewport-pane {
  flex: 1;
  min-height: 120px;
}

.splitter-v {
  width: 5px;
  background: #111130;
  cursor: col-resize;
  flex-shrink: 0;
}

.splitter-v:hover { background: #4466cc; }

.vp2-toolbar-left, .vp2-toolbar-right {
  position: absolute;
  top: 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  z-index: 10;
}

.vp2-toolbar-left { left: 8px; }
.vp2-toolbar-right { right: 8px; }

.vp2-view-presets {
  position: absolute;
  bottom: 8px;
  left: 8px;
  display: flex;
  gap: 2px;
  z-index: 10;
}

.vp2-status-bar {
  height: 22px;
  background: #08081a;
  border-top: 1px solid #1a1a3a;
  display: flex;
  align-items: center;
  padding: 0 8px;
  font-size: 10px;
  color: #505070;
  gap: 8px;
  flex-shrink: 0;
}

.vp2-status-bar .label {
  color: #4466aa;
  font-weight: 700;
  font-size: 9px;
  text-transform: uppercase;
}

.vp2-editor-panel {
  border-top: 1px solid #1a1a3a;
  background: #0a0a18;
  overflow: hidden;
  flex-shrink: 0;
}

.vp2-editor-panel.collapsed .vp2-editor-content {
  display: none;
}

.vp2-editor-panel:not(.collapsed) {
  max-height: 140px;
}

.vp2-editor-header {
  height: 22px;
  display: flex;
  align-items: center;
  padding: 0 6px;
  gap: 4px;
  font-size: 10px;
  color: #505070;
  background: linear-gradient(180deg, #0c0c1e, #0a0a18);
}

.vp2-editor-header .label {
  color: #4466aa;
  font-weight: 700;
  font-size: 9px;
  text-transform: uppercase;
}

.vp2-editor-filename {
  color: #444466;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.vp2-editor-content {
  padding: 4px 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: #8888bb;
  background: #0a0a18;
  overflow: auto;
  max-height: 118px;
  white-space: pre;
  margin: 0;
  tab-size: 2;
}

.vp2-checkpoint-panel {
  border-top: 1px solid #1a1a3a;
  background: #0a0a18;
  flex-shrink: 0;
  max-height: 30%;
  min-height: 22px;
  display: flex;
  flex-direction: column;
}

.vp2-checkpoint-panel.collapsed .vp2-checkpoint-tree {
  display: none;
}

.vp2-checkpoint-header {
  height: 22px;
  display: flex;
  align-items: center;
  padding: 0 6px;
  gap: 4px;
  font-size: 10px;
  color: #505070;
  background: linear-gradient(180deg, #0c0c1e, #0a0a18);
  flex-shrink: 0;
}

.vp2-checkpoint-header .label {
  color: #4466aa;
  font-weight: 700;
  font-size: 9px;
  text-transform: uppercase;
}

.vp2-checkpoint-tree {
  overflow-y: auto;
  padding: 4px 0;
  flex: 1;
}

.vp2-render-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 8, 24, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

.vp2-render-overlay.visible {
  display: flex;
}

#viewport canvas {
  display: block;
}

/* ── Viewport Toolbar ──────────────────────────────────────────────── */

#viewport-toolbar-right {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 10;
}

#viewport-toolbar-left {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 10;
}

.toolbar-btn {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 1px solid #222244;
  background: rgba(10, 10, 26, 0.85);
  color: #6666aa;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  transition: all 0.15s;
  backdrop-filter: blur(8px);
}

.toolbar-btn:hover {
  background: rgba(20, 20, 50, 0.95);
  color: #8888cc;
  border-color: #333366;
}

.toolbar-btn.active {
  background: rgba(40, 40, 100, 0.85);
  color: #4488ff;
  border-color: #4466aa;
}

.toolbar-btn svg {
  width: 18px;
  height: 18px;
}

/* Render button — visually distinct, text label */
.render-btn {
  color: #44cc77;
  border-color: #2a5a3a;
  background: rgba(10, 26, 18, 0.9);
  margin-bottom: 8px;
}

.render-btn:hover {
  color: #66ff99;
  border-color: #44aa66;
  background: rgba(20, 50, 35, 0.95);
}

.render-text-btn {
  width: auto;
  padding: 5px 10px;
  font-size: 10px;
  font-weight: 700;
  font-family: inherit;
  letter-spacing: 0.5px;
}

/* ── Part Properties Panel ──────────────────────────────────────────── */

#part-props {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 260px;
  background: rgba(10, 10, 26, 0.92);
  border: 1px solid #2a2a5a;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  z-index: 15;
  backdrop-filter: blur(8px);
  font-size: 11px;
  overflow: hidden;
}

#part-props.hidden {
  display: none;
}

#part-props-header {
  display: flex;
  align-items: center;
  padding: 8px 10px;
  border-bottom: 1px solid #1a1a3a;
  gap: 4px;
}

#part-props-title {
  flex: 1;
  font-weight: 600;
  color: #b0b0d0;
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#part-props-header button {
  width: 20px;
  height: 20px;
  border: none;
  background: transparent;
  color: #5566aa;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 14px;
  border-radius: 3px;
  transition: all 0.1s;
}

#part-props-header button:hover {
  background: #1a1a3a;
  color: #8899cc;
}

#part-props-header button svg {
  width: 14px;
  height: 14px;
}

#part-props-body {
  padding: 8px 10px;
}

.prop-row {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
  border-bottom: 1px solid #111130;
}

.prop-row:last-child {
  border-bottom: none;
}

.prop-key {
  color: #666688;
}

.prop-val {
  color: #b0b0d0;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  font-size: 10px;
  text-align: right;
}

.prop-color-input {
  width: 48px;
  height: 22px;
  border: 1px solid #222244;
  border-radius: 3px;
  background: #0d0d1a;
  cursor: pointer;
  padding: 1px;
}

.prop-color-input::-webkit-color-swatch-wrapper { padding: 0; }
.prop-color-input::-webkit-color-swatch { border: none; border-radius: 2px; }

.prop-val.highlight {
  color: #50fa7b;
  font-weight: 600;
}

#part-props-settings {
  padding: 8px 10px;
  border-top: 1px solid #1a1a3a;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#part-props-settings.hidden {
  display: none;
}

#part-props-settings label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #666688;
  font-size: 10px;
}

#part-props-settings input,
#part-props-settings select {
  width: 100px;
  padding: 2px 6px;
  border: 1px solid #222244;
  border-radius: 3px;
  background: #0d0d1a;
  color: #b0b0d0;
  font-size: 10px;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  outline: none;
}

#part-props-settings input:focus,
#part-props-settings select:focus {
  border-color: #4466aa;
}

/* ── View Presets ──────────────────────────────────────────────────── */

#view-presets {
  position: absolute;
  bottom: 12px;
  left: 12px;
  display: flex;
  gap: 3px;
  z-index: 10;
}

.preset-btn {
  height: 24px;
  padding: 0 8px;
  border-radius: 4px;
  border: 1px solid #222244;
  background: rgba(10, 10, 26, 0.85);
  color: #5555aa;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: all 0.15s;
  backdrop-filter: blur(8px);
  font-family: inherit;
}

.preset-btn:hover {
  background: rgba(30, 30, 60, 0.95);
  color: #8888cc;
  border-color: #333366;
}

/* ── Render Overlay ────────────────────────────────────────────────── */

#render-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 8, 24, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(4px);
}

#render-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.overlay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #1a1a44;
  border-top-color: #4488ff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.overlay-text {
  font-size: 14px;
  color: #8888bb;
  font-weight: 500;
}

.overlay-time {
  font-size: 24px;
  font-weight: 300;
  color: #4466aa;
  font-variant-numeric: tabular-nums;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
}

.overlay-bar {
  width: 200px;
  height: 3px;
  background: #1a1a3a;
  border-radius: 2px;
  overflow: hidden;
}

.bar-fill {
  width: 30%;
  height: 100%;
  background: linear-gradient(90deg, #4488ff, #6644cc);
  border-radius: 2px;
  animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
  0% { transform: translateX(-100%); width: 30%; }
  50% { transform: translateX(150%); width: 50%; }
  100% { transform: translateX(500%); width: 30%; }
}

/* ── Status Bar ────────────────────────────────────────────────────── */

#status-bar {
  height: 26px;
  background: linear-gradient(180deg, #0c0c1e, #08081a);
  border-top: 1px solid #1a1a3a;
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 11px;
  color: #505070;
  gap: 12px;
  flex-shrink: 0;
}

#status-bar .spacer { flex: 1; }

#color-swatches {
  display: flex;
  gap: 4px;
  align-items: center;
}

.swatch {
  width: 16px;
  height: 16px;
  border-radius: 3px;
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
}

.swatch:hover {
  transform: scale(1.2);
  box-shadow: 0 0 6px rgba(255,255,255,0.2);
}

#swatch-editor {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

#swatch-editor:not(.hidden) {
  opacity: 1;
  pointer-events: auto;
}

#status-bar .label {
  color: #4466aa;
  font-weight: 700;
  letter-spacing: 0.5px;
  font-size: 10px;
  text-transform: uppercase;
}

/* ── Editor Panel ──────────────────────────────────────────────────── */

#editor-panel {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-top: 1px solid #1a1a3a;
  background: #0a0a18;
  transition: height 0.2s ease;
  overflow: hidden;
}

#editor-panel.collapsed {
  height: 26px !important;
}

#editor-panel:not(.collapsed) {
  height: 220px;
  min-height: 100px;
  max-height: 50%;
}

#editor-header {
  height: 26px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  font-size: 11px;
  color: #505070;
  background: linear-gradient(180deg, #0c0c1e, #0a0a18);
  border-bottom: 1px solid #111130;
  flex-shrink: 0;
  gap: 6px;
}

#editor-header .label {
  color: #4466aa;
  font-weight: 700;
  letter-spacing: 0.5px;
  font-size: 10px;
  text-transform: uppercase;
}

#editor-header .spacer {
  flex: 1;
}

#editor-filename {
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  font-size: 10px;
  color: #444466;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#editor-toggle {
  width: 20px;
  height: 20px;
  border: none;
  background: transparent;
  color: #4466aa;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: transform 0.2s;
}

#editor-toggle svg {
  width: 14px;
  height: 14px;
}

#editor-panel.collapsed #editor-toggle {
  transform: rotate(-90deg);
}

.small-btn {
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid #222244;
  background: rgba(20, 20, 40, 0.8);
  color: #5566aa;
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.small-btn:hover {
  background: rgba(30, 30, 60, 0.9);
  color: #7788cc;
  border-color: #333366;
}

.small-btn.active {
  background: rgba(40, 40, 100, 0.8);
  color: #4488ff;
  border-color: #4466aa;
}

.small-btn.hidden {
  display: none;
}

#editor-container {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ── Checkpoint Panel ──────────────────────────────────────────────── */

#checkpoint-panel {
  flex-shrink: 0;
  max-height: 25%;
  min-height: 60px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid #1a1a3a;
  background: #0a0a18;
}

#checkpoint-header {
  height: 26px;
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 11px;
  color: #505070;
  background: linear-gradient(180deg, #0c0c1e, #0a0a18);
  border-bottom: 1px solid #111130;
  flex-shrink: 0;
}

#checkpoint-header .label {
  color: #4466aa;
  font-weight: 700;
  letter-spacing: 0.5px;
  font-size: 10px;
  text-transform: uppercase;
}

#checkpoint-header .spacer {
  flex: 1;
}

/* Collapsible checkpoint panel */
#checkpoint-panel.collapsed #checkpoint-tree {
  display: none;
}

#checkpoint-panel.collapsed {
  min-height: auto;
  max-height: none;
}

.panel-toggle {
  width: 20px;
  height: 20px;
  border: none;
  background: transparent;
  color: #4466aa;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.panel-toggle svg {
  width: 14px;
  height: 14px;
}

#checkpoint-panel.collapsed .panel-toggle {
  transform: rotate(-90deg);
}

/* ── Checkpoint Context Menu ────────────────────────────────────────── */

#cp-context-menu {
  position: fixed;
  z-index: 300;
  width: 200px;
  background: #0e0e22;
  border: 1px solid #2a2a5a;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  padding: 4px 0;
  overflow: hidden;
}

#cp-context-menu.hidden {
  display: none;
}

.ctx-item {
  display: block;
  width: 100%;
  padding: 7px 14px;
  border: none;
  background: transparent;
  color: #8888bb;
  font-size: 12px;
  text-align: left;
  cursor: pointer;
  transition: background 0.1s;
  font-family: inherit;
}

.ctx-item:hover {
  background: #1a1a3a;
  color: #c0c0e0;
}

.ctx-item.ctx-danger {
  color: #cc4444;
}

.ctx-item.ctx-danger:hover {
  background: #2a1010;
  color: #ff6666;
}

.ctx-divider {
  height: 1px;
  background: #1a1a3a;
  margin: 4px 0;
}

/* ── Checkpoint Tooltip ────────────────────────────────────────────── */

#cp-tooltip {
  position: fixed;
  z-index: 200;
  max-width: 320px;
  padding: 10px 14px;
  background: #111130;
  border: 1px solid #2a2a5a;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  pointer-events: none;
  font-size: 12px;
  line-height: 1.5;
}

#cp-tooltip.hidden {
  display: none;
}

#cp-tooltip-desc {
  color: #c0c0e0;
  margin-bottom: 6px;
}

#cp-tooltip-desc:empty {
  display: none;
}

#cp-tooltip-meta {
  color: #555580;
  font-size: 10px;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
}

#checkpoint-tree {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
}

#checkpoint-tree::-webkit-scrollbar {
  width: 6px;
}

#checkpoint-tree::-webkit-scrollbar-track {
  background: #0a0a18;
}

#checkpoint-tree::-webkit-scrollbar-thumb {
  background: #1e1e3e;
  border-radius: 3px;
}

#checkpoint-tree::-webkit-scrollbar-thumb:hover {
  background: #2a2a5a;
}

.cp-empty {
  padding: 20px 16px;
  text-align: center;
  color: #333360;
  font-size: 12px;
  line-height: 1.6;
}

/* ── Checkpoint Nodes ──────────────────────────────────────────────── */

.cp-node {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  cursor: pointer;
  font-size: 12px;
  transition: background 0.15s;
  position: relative;
}

.cp-node:hover {
  background: #111128;
}

.cp-node.active {
  background: #151538;
}

.cp-prefix {
  color: #2a2a5a;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
  font-size: 12px;
  white-space: pre;
  flex-shrink: 0;
  line-height: 1;
}

.cp-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid #2a2a55;
  background: transparent;
  flex-shrink: 0;
  transition: all 0.2s;
}

.cp-dot.root {
  border-color: #337744;
}

.cp-node.active .cp-dot {
  background: #4488ff;
  border-color: #4488ff;
  box-shadow: 0 0 8px #4488ff55;
  animation: dotPulse 2s ease-in-out infinite;
}

.cp-node.active .cp-dot.root {
  background: #44cc77;
  border-color: #44cc77;
  box-shadow: 0 0 8px #44cc7755;
}

@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 6px #4488ff44; }
  50% { box-shadow: 0 0 12px #4488ff66; }
}

.cp-node:hover .cp-dot {
  border-color: #4466aa;
}

.cp-label {
  flex: 1;
  color: #666688;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.15s;
}

.cp-node.active .cp-label {
  color: #b0b0d0;
  font-weight: 600;
}

.cp-node:hover .cp-label {
  color: #9999bb;
}

.cp-rename-input {
  flex: 1;
  padding: 1px 4px;
  border: 1px solid #4466aa;
  border-radius: 3px;
  background: #0a0a18;
  color: #d0d0e0;
  font-size: 12px;
  font-family: inherit;
  outline: none;
  min-width: 60px;
}

.cp-delete-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: #1e0e0e;
  border-bottom: 1px solid #5a2a2a;
  font-size: 12px;
  color: #cc8888;
}

.cp-delete-bar button {
  padding: 2px 10px;
  border-radius: 3px;
  border: 1px solid;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
}

.cp-delete-yes {
  background: #3a1515;
  border-color: #5a2a2a;
  color: #ff6666;
}

.cp-delete-yes:hover {
  background: #4a1a1a;
}

.cp-delete-no {
  background: transparent;
  border-color: #333355;
  color: #8888aa;
}

.cp-delete-no:hover {
  background: #1a1a3a;
}

.cp-collapse-icon {
  font-size: 8px;
  color: #444466;
  cursor: pointer;
  margin-left: 4px;
  padding: 2px;
  flex-shrink: 0;
  transition: color 0.1s;
}

.cp-collapse-icon:hover {
  color: #8888bb;
}

.cp-time {
  color: #2a2a44;
  font-size: 10px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  font-family: "JetBrains Mono", Menlo, Monaco, monospace;
}

/* ── Splitter ──────────────────────────────────────────────────────── */

#splitter {
  width: 5px;
  background: #111130;
  cursor: col-resize;
  flex-shrink: 0;
  transition: background 0.15s;
  position: relative;
}

#splitter::after {
  content: '';
  position: absolute;
  inset: 0 -3px;
}

#splitter:hover,
#splitter.active {
  background: #4466cc;
}

/* ── Right Panel ───────────────────────────────────────────────────── */

#right-panel {
  flex: 1;
  min-width: 300px;
  display: flex;
  flex-direction: column;
}

/* ── Chat Panel ─────────────────────────────────────────────────────── */

#right-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

#chat-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  background: #11112a;
  border-bottom: 1px solid #1e1e3a;
  flex-shrink: 0;
}

#provider-select {
  flex: 1;
  background: #1a1a35;
  color: #c8c8e8;
  border: 1px solid #2a2a55;
  border-radius: 4px;
  padding: 3px 6px;
  font-size: 12px;
}

.icon-btn {
  background: #1a1a35;
  color: #8888bb;
  border: 1px solid #2a2a55;
  border-radius: 4px;
  padding: 3px 7px;
  cursor: pointer;
  font-size: 12px;
  flex-shrink: 0;
}

.icon-btn:hover { background: #22224a; color: #c8c8e8; }

#settings-panel {
  background: #0e0e22;
  border-bottom: 1px solid #1e1e3a;
  padding: 8px 10px;
  flex-shrink: 0;
  max-height: 260px;
  overflow-y: auto;
}

.settings-section {
  border-bottom: 1px solid #1a1a35;
  padding-bottom: 6px;
  margin-bottom: 6px;
}

.settings-section:last-of-type { border-bottom: none; }

.settings-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 3px;
}

.settings-row label {
  width: 110px;
  font-size: 11px;
  color: #8888bb;
  flex-shrink: 0;
}

.settings-row input {
  flex: 1;
  background: #1a1a35;
  color: #c8c8e8;
  border: 1px solid #2a2a55;
  border-radius: 3px;
  padding: 2px 5px;
  font-size: 11px;
  min-width: 0;
}

.settings-row small { font-size: 10px; color: #6666aa; }

#settings-save-btn {
  margin-top: 5px;
  background: #2a2a6a;
  color: #c8c8ff;
  padding: 4px 10px;
}

#chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  user-select: text;
}

#chat-messages::-webkit-scrollbar { width: 5px; }
#chat-messages::-webkit-scrollbar-track { background: #0d0d1a; }
#chat-messages::-webkit-scrollbar-thumb { background: #1e1e3e; border-radius: 3px; }

.chat-msg {
  border-radius: 6px;
  padding: 7px 9px;
  font-size: 12px;
  line-height: 1.5;
  word-break: break-word;
  max-width: 100%;
}

.chat-msg-user {
  background: #1a2a4a;
  color: #c8d8ff;
  align-self: flex-end;
  max-width: 88%;
  border-radius: 6px 6px 2px 6px;
}

.chat-msg-assistant {
  background: #111128;
  color: #d0d0e8;
  border: 1px solid #1e1e3a;
}

.chat-msg-assistant pre.chat-text {
  margin: 0;
  white-space: pre-wrap;
  font-family: inherit;
  font-size: 12px;
}

.chat-msg-error {
  background: #200000;
  color: #ff8888;
  border: 1px solid #440000;
  font-size: 11px;
}

.chat-msg-system {
  background: #0d1a0d;
  color: #88cc88;
  border: 1px solid #1a3a1a;
  font-size: 11px;
  font-style: italic;
}

.chat-tool-chip {
  background: #0c1a0c;
  border: 1px solid #1a3318;
  border-radius: 4px;
  padding: 4px 7px;
  font-size: 11px;
  color: #88cc88;
}

.tool-chip-header { display: flex; align-items: center; gap: 6px; }
.tool-name { font-weight: 600; }
.tool-status { font-size: 10px; opacity: 0.85; }
.tool-status-running { color: #aaaa44; }
.tool-status-done { color: #44cc44; }
.tool-status-error { color: #cc4444; }

.chat-tool-chip details { margin-top: 3px; }
.chat-tool-chip summary { cursor: pointer; color: #557755; font-size: 10px; }
.chat-tool-chip pre { margin: 2px 0 0; font-size: 10px; color: #558855; max-height: 80px; overflow-y: auto; }

#chat-input-area {
  display: flex;
  gap: 5px;
  padding: 6px 8px;
  background: #0e0e22;
  border-top: 1px solid #1e1e3a;
  flex-shrink: 0;
}

#chat-input {
  flex: 1;
  background: #1a1a35;
  color: #c8c8e8;
  border: 1px solid #2a2a55;
  border-radius: 4px;
  padding: 5px 7px;
  font-size: 12px;
  font-family: inherit;
  resize: none;
  min-width: 0;
}

#chat-input:focus { outline: none; border-color: #4444aa; }
#chat-input::placeholder { color: #4a4a7a; }

#chat-send {
  background: #2a2a7a;
  color: #c8c8ff;
  border: 1px solid #4444aa;
  border-radius: 4px;
  padding: 5px 12px;
  cursor: pointer;
  font-size: 12px;
  align-self: flex-end;
  flex-shrink: 0;
}

#chat-send:hover { background: #3535a0; }
#chat-send:disabled { opacity: 0.4; cursor: not-allowed; }

.hidden { display: none !important; }

/* ── Terminal Panes (kept for reference, no longer used) ────────────── */

.terminal-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.terminal-pane.hidden {
  display: none;
}

.terminal-pane + .terminal-pane:not(.hidden) {
  border-top: 2px solid #222244;
}

.terminal-pane-header {
  height: 26px;
  background: linear-gradient(180deg, #0c0c1e, #08081a);
  border-bottom: 1px solid #1a1a3a;
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 11px;
  color: #505070;
  flex-shrink: 0;
  position: relative;
}

.terminal-pane-header .label {
  color: #4466aa;
  font-weight: 700;
  letter-spacing: 0.5px;
  font-size: 10px;
  text-transform: uppercase;
}

.terminal-pane-header .spacer {
  flex: 1;
}

/* ── Session Dropdown ──────────────────────────────────────────────── */

#session-dropdown {
  position: absolute;
  top: 100%;
  right: 8px;
  width: 320px;
  max-height: 360px;
  background: #0e0e22;
  border: 1px solid #1a1a3a;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  z-index: 100;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#session-dropdown.hidden {
  display: none;
}

.session-action {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border: none;
  background: transparent;
  color: #8888bb;
  font-size: 12px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background 0.1s;
  font-family: inherit;
}

.session-action:hover {
  background: #151538;
  color: #b0b0d0;
}

.session-action:first-child {
  color: #4488ff;
  font-weight: 600;
}

.session-divider {
  height: 1px;
  background: #1a1a3a;
  margin: 4px 0;
}

#session-list {
  flex: 1;
  overflow-y: auto;
  max-height: 260px;
}

#session-list::-webkit-scrollbar {
  width: 6px;
}

#session-list::-webkit-scrollbar-thumb {
  background: #1e1e3e;
  border-radius: 3px;
}

.session-item {
  padding: 8px 12px;
  cursor: pointer;
  transition: background 0.1s;
  border-bottom: 1px solid #111130;
}

.session-item:hover {
  background: #151538;
}

.session-item-date {
  font-size: 10px;
  color: #444466;
  font-variant-numeric: tabular-nums;
  margin-bottom: 2px;
}

.session-item-msg {
  font-size: 11px;
  color: #7777aa;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-empty {
  padding: 16px;
  text-align: center;
  color: #333360;
  font-size: 11px;
}

.terminal-container {
  flex: 1;
  overflow: hidden;
  background: #0d0d1a;
  padding: 4px;
}

.xterm {
  height: 100%;
}

.xterm-viewport::-webkit-scrollbar {
  width: 6px;
}

.xterm-viewport::-webkit-scrollbar-track {
  background: #0d0d1a;
}

.xterm-viewport::-webkit-scrollbar-thumb {
  background: #1e1e3e;
  border-radius: 3px;
}

.xterm-viewport::-webkit-scrollbar-thumb:hover {
  background: #2a2a5a;
}

/* ── Toast Notifications ───────────────────────────────────────────── */

#toast-container {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: #d0d0e0;
  background: #1a1a38;
  border: 1px solid #2a2a5a;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  pointer-events: auto;
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.toast.hiding {
  animation: toastOut 0.3s ease forwards;
}

@keyframes toastOut {
  to {
    transform: translateY(20px);
    opacity: 0;
  }
}

.toast-success {
  border-color: #2a5a3a;
  background: #0e1e18;
}

.toast-error {
  border-color: #5a2a2a;
  background: #1e0e0e;
}

.toast-info {
  border-color: #2a2a5a;
  background: #1a1a38;
}