:root {
  --bg: #ffffff;
  --panel: #f6f7f9;
  --line: #e3e6ea;
  --text: #1f2933;
  --muted: #6b7682;
  --accent: #2f6fb3;
  --accent-hover: #285f9a;
  --danger: #c2453a;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  height: 100%;
  font: 14px/1.4 var(--sans);
  color: var(--text);
  background: var(--bg);
}

body {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
}

header {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  flex: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 7px;
  color: inherit;
  text-decoration: none;
  font-size: 17px;
  letter-spacing: 0.2px;
}

.brand img {
  width: 22px;
  height: 22px;
}

.actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  flex: none;
}

button {
  font: inherit;
  font-size: 13px;
  height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

button:hover {
  border-color: #c9cfd6;
  background: #fafbfc;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

button svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 500;
}

button.primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

button.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

button.line svg,
.menu svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}

/* the download button and its menu */
.dl {
  position: relative;
}

.menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  z-index: 10;
  min-width: 170px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 28px rgba(20, 30, 40, 0.16);
  display: flex;
  flex-direction: column;
}

.menu button {
  border: none;
  height: 30px;
  padding: 0 8px;
  border-radius: 5px;
  justify-content: space-between;
  gap: 16px;
  font-weight: 500;
}

.menu button:hover {
  background: #f1f4f7;
}

.menu small {
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
}

/* the file tabs above the editor: + adds a file, ··· has the file and
   project actions */
.filebar {
  flex: none;
  display: flex;
  align-items: flex-end;
  height: 36px;
  padding: 0 8px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  gap: 2px;
}

#tabs {
  min-width: 0;
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

#tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  flex: none;
  position: relative;
  height: 30px;
  margin-bottom: -1px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  background: none;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.tab:hover {
  border-color: transparent;
  background: #eceff3;
  color: var(--text);
}

.tab[aria-selected="true"] {
  border-color: var(--line);
  background: #fff;
  color: var(--text);
  font-weight: 500;
  /* covers the bar's bottom line: the tab opens into the editor */
  box-shadow: 0 1px 0 #fff;
}

.tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

/* the file of the last error */
.tab.err::after {
  content: "";
  position: absolute;
  top: 7px;
  right: 4px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #d4574a;
}

.tab-add {
  flex: none;
  width: 26px;
  height: 26px;
  margin: 0 0 3px 2px;
  padding: 0;
  justify-content: center;
  border-color: transparent;
  background: none;
  color: var(--muted);
}

.tab-add:hover {
  border-color: transparent;
  background: #eceff3;
  color: var(--text);
}

.tab-add svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
}

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

#left {
  width: clamp(340px, 42%, 720px);
  min-width: 0;
  flex: none;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  transition: width 180ms ease;
}

main:not(.code-open) #left {
  width: 0 !important;
  visibility: hidden;
}

main:not(.code-open) #split {
  display: none;
}

body.resizing #left {
  transition: none;
}

/* the splitter: a 1 px line with a wider grip area; split.js moves it */
#split {
  flex: none;
  position: relative;
  z-index: 3;
  width: 1px;
  background: var(--line);
  cursor: col-resize;
  touch-action: none;
  outline: none;
}

#split::before {
  content: "";
  position: absolute;
  inset: 0 -5px;
}

/* the grip, on hover, focus and while dragging */
#split::after {
  content: "";
  position: absolute;
  top: 50%;
  left: -2px;
  width: 5px;
  height: 36px;
  margin-top: -18px;
  border-radius: 3px;
  background: #b9c1ca;
  opacity: 0;
  transition: opacity 0.15s;
}

#split:hover,
#split:focus-visible,
body.resizing #split {
  background: #c9d0d8;
}

#split:hover::after,
#split:focus-visible::after,
body.resizing #split::after {
  opacity: 1;
}

body.resizing {
  user-select: none;
  -webkit-user-select: none;
}

body.resizing.h,
body.resizing.h * {
  cursor: col-resize !important;
}

body.resizing.v,
body.resizing.v * {
  cursor: row-resize !important;
}

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

#editor .cm-editor {
  height: 100%;
}

#bar {
  flex: none;
  display: flex;
  max-height: 32%;
  min-height: 34px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

/* A slim, permanent bar: these controls never move with the drawer. */
#controls {
  position: relative;
  z-index: 4;
  flex: none;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 7px 12px max(7px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: var(--bg);
}

#run-controls {
  display: flex;
  flex: none;
  gap: 6px;
}

#code-toggle[aria-expanded="true"] {
  background: #edf3fa;
  border-color: #bdcfe3;
  color: var(--accent);
}

#run-error {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 12px;
  width: max-content;
  max-width: min(560px, calc(100vw - 24px));
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid #f1b8b1;
  border-radius: 8px;
  background: #fff5f3;
  color: #a82b20;
  box-shadow: 0 4px 20px #39202014;
}

#run-error-text {
  min-width: 0;
  max-height: 120px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 12px/1.5 var(--mono);
}

#show-code {
  flex: none;
  color: #a82b20;
  border-color: #f1b8b1;
}

#console {
  flex: 1 1 auto;
  min-width: 130px;
  overflow: auto;
  font: 12px/1.45 var(--mono);
  padding: 8px 12px;
  white-space: pre-wrap;
  word-break: break-word;
}

#console .err {
  color: #b42318;
  background: #fdecea;
  border-left: 3px solid #e5533f;
  margin: 2px -12px;
  padding: 4px 9px;
}

#console .out {
  color: #39424c;
}

#console .info {
  color: var(--muted);
}

/* the thread count, at the end of the bar */
#threads {
  flex: none;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  line-height: 1.45;
  color: #98a2ad;
  white-space: nowrap;
  cursor: default;
}

#threads::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #c3cad1;
}

#threads.mt::before {
  background: #4caf7a;
}

#threads.st::before {
  background: #dba54a;
}

#right {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

#stage {
  flex: 1;
  position: relative;
  min-height: 0;
}

#viewer {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 40%, #fbfcfd 0%, #eef1f4 60%, #e2e6eb 100%);
  overflow: hidden;
  touch-action: none;
}

#viewer canvas {
  display: block;
}

.nogl {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 40px;
  text-align: center;
  color: var(--muted);
}

.hud {
  position: absolute;
  display: flex;
  gap: 6px;
  align-items: center;
}

#hud {
  top: 10px;
  right: 10px;
}

.hud button {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  height: 28px;
  font-size: 12.5px;
}

.hud button.toggle.on {
  background: #23344a;
  border-color: #23344a;
  color: #fff;
}

.hud button svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linejoin: round;
  stroke-linecap: round;
}

/* the parts panel (parts.js), under the viewer's buttons */
/* the parts tree, under the selected output in the sidebar (parts.js) */
#parts {
  margin: 2px 0 8px 15px;
  padding-left: 6px;
  border-left: 2px solid var(--line);
  font-size: 12.5px;
  user-select: none;
  -webkit-user-select: none;
}

.parts-head {
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  padding: 4px 4px 0 10px;
}

/* nothing to say: no shared root, nothing hidden */
#parts:not(.has-hidden) .parts-all,
#parts:not(.has-hidden) .parts-head:has(.parts-title:empty) {
  display: none;
}

.parts-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #8a949e;
}

#parts button {
  height: 22px;
  padding: 0;
  border: none;
  background: none;
  color: #8a949e;
  font-size: 12px;
}

#parts .parts-all {
  margin-left: auto;
  padding: 0 6px;
  border-radius: 4px;
  color: var(--accent);
}

#parts .parts-all:hover {
  background: #edf3fa;
}

.parts-list {
  min-height: 0;
  overflow-y: auto;
  padding: 4px;
}

.part {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 26px;
  padding: 0 2px 0 calc(6px + var(--depth) * 17px);
  border-radius: 5px;
  cursor: default;
}

.part.lit {
  background: #edf1f5;
}

.part.selected {
  background: #e3ecf6;
}

.part .swatch {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--c);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12);
}

.parts-sep {
  height: 1px;
  margin: 4px 6px;
  background: var(--line);
}

.part.reference .swatch {
  background: color-mix(in srgb, var(--c) 30%, transparent);
  box-shadow: inset 0 0 0 1.5px var(--c);
}

.part .name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.part.off .name {
  color: #9ba5af;
}

.part.off .swatch {
  opacity: 0.35;
}

#parts .caret {
  flex: none;
  width: 10px;
  justify-content: center;
}

.caret svg,
.eye svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.caret svg {
  width: 10px;
  height: 10px;
  transition: transform 0.12s;
}

.part.open .caret svg {
  transform: rotate(90deg);
}

#parts .eye {
  flex: none;
  width: 24px;
  justify-content: center;
  border-radius: 4px;
}

.eye svg {
  width: 15px;
  height: 15px;
}

.part.partly .eye {
  opacity: 0.55;
}

#parts .only {
  padding: 0 6px;
  border-radius: 4px;
  font-size: 11.5px;
}

#parts .only:hover,
#parts .eye:hover {
  color: var(--accent);
  background: #fff;
}

/* a mouse: the eye and "only" show on the row under it (and the eye of a
   hidden part stays); touch: eyes always, "only" on the tapped row */
@media (hover: hover) {
  .part:not(:hover):not(:has(:focus-visible)):not(.off):not(.partly) .eye {
    visibility: hidden;
  }
  .part:not(:hover):not(:has(:focus-visible)) .only {
    display: none;
  }
}

@media (hover: none) {
  .part {
    height: 32px;
  }
  .part:not(.selected) .only {
    display: none;
  }
  #parts .eye {
    width: 32px;
    height: 30px;
  }
}

/* Download: export only the visible parts (shown when some are hidden) */
.menu-check {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  margin: 4px -4px -4px;
  padding: 0 12px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  cursor: pointer;
}

.menu-check input {
  margin: 0;
  accent-color: var(--accent);
}

/* the polygon count and genau time: quiet text in the viewer's corner */
#counts {
  position: absolute;
  right: 12px;
  bottom: 9px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: #66717d;
  text-shadow: 0 0 4px #fff, 0 0 2px #fff;
  white-space: nowrap;
  pointer-events: none;
}

/* Replay stays below the view, even with the editor closed. */
#replay {
  flex: 1 1 auto;
  max-width: 280px;
  min-width: 0;
  justify-content: flex-end;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

#play {
  width: 24px;
  height: 22px;
  padding: 0;
  justify-content: center;
  flex: none;
}

#play svg {
  width: 11px;
  height: 11px;
  fill: currentColor;
}

#scrub {
  flex: 1 1 60px;
  width: 60px;
  min-width: 50px;
  max-width: 170px;
  margin: 0;
  accent-color: var(--accent);
}

#frame {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.status {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 8px 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  pointer-events: none;
}

.status[hidden] {
  display: none;
}

/* the Agent button and its popover */
#link .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #b8c0c9;
}

#link[data-state="on"] .dot {
  background: #2e9d5b;
}

#link[data-state="connecting"] .dot {
  background: #d9a23a;
  animation: blink 1s ease-in-out infinite;
}

#link[data-state="replaced"] .dot {
  background: #d9a23a;
}

@keyframes blink {
  50% {
    opacity: 0.3;
  }
}

.pop {
  position: fixed;
  top: 52px;
  right: 12px;
  z-index: 10;
  width: min(400px, calc(100vw - 16px));
  padding: 8px 12px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 12px 40px rgba(20, 30, 40, 0.18);
}

.pop-head {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0 -6px 4px 0;
  font-size: 12px;
}

#link-status {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#link-status::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #b8c0c9;
}

#link-status[data-state="on"]::before {
  background: #2e9d5b;
}

#link-status[data-state="connecting"]::before,
#link-status[data-state="replaced"]::before {
  background: #d9a23a;
}

.pop button.quiet {
  border: none;
  background: none;
  height: 24px;
  padding: 0 6px;
  font-size: 12px;
  color: var(--muted);
}

.pop button.quiet:hover {
  color: var(--accent);
  background: #f1f4f7;
}

.pop .close {
  border: none;
  background: none;
  font-size: 20px;
  height: 24px;
  width: 26px;
  padding: 0;
  justify-content: center;
  color: var(--muted);
}

.field + .field {
  margin-top: 10px;
}

.field-label {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 600;
  color: #3d4752;
}

/* the "?" with its tip: hover or focus, or a tap (.open) */
.tip {
  position: relative;
  width: 15px;
  height: 15px;
  padding: 0;
  justify-content: center;
  border: 1px solid #c9cfd6;
  border-radius: 50%;
  background: #fff;
  font-size: 10px;
  font-weight: 600;
  line-height: 1;
  color: var(--muted);
  cursor: help;
}

.tip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #fff;
}

.tip::after {
  content: attr(data-tip);
  position: absolute;
  left: -8px;
  top: calc(100% + 6px);
  z-index: 1;
  width: max-content;
  max-width: min(260px, calc(100vw - 60px));
  padding: 6px 9px;
  border-radius: 6px;
  background: #23344a;
  color: #fff;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.4;
  text-align: left;
  white-space: normal;
  box-shadow: 0 4px 14px rgba(20, 30, 40, 0.2);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.12s;
  pointer-events: none;
}

.tip:hover::after,
.tip:focus-visible::after,
.tip.open::after {
  opacity: 1;
  visibility: visible;
}

.pop-url {
  display: flex;
}

.pop-url input {
  flex: 1;
  min-width: 0;
  height: 30px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-right: none;
  border-radius: 6px 0 0 6px;
  background: var(--panel);
  font: 12px var(--mono);
  color: var(--text);
}

.pop-url input:focus {
  outline: none;
  border-color: #b9c6d4;
}

button.copy {
  width: 34px;
  height: 30px;
  padding: 0;
  justify-content: center;
  border-radius: 0 6px 6px 0;
  color: var(--muted);
}

button.copy:hover {
  color: var(--accent);
}

button.copy svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

button.copy.done {
  color: #23784a;
}

/* what the agent is doing, over the viewer */
.chip {
  position: absolute;
  top: 10px;
  left: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #23344a;
  color: #fff;
  font-size: 12px;
  pointer-events: none;
}

/* a note (catching up after the page was away): under the viewer's
   buttons, wrapping on narrow screens */
.chip.note {
  top: 48px;
  max-width: calc(100% - 48px);
  border-radius: 12px;
  line-height: 1.35;
}

.cm-error-line {
  background: #fde8e6 !important;
}

.project-actions { position: relative; margin: 0 0 3px auto; flex: none; }
#project-actions { width: 30px; height: 26px; justify-content: center; font-weight: 700; }
.project-actions .menu { right: 0; min-width: 170px; }
.menu .danger-item { color: #b42318; }
.menu-sep { height: 1px; margin: 4px 2px; background: var(--line); }
.unsaved-dot { display: none; flex: none; width: 6px; height: 6px; border-radius: 50%; background: #c88623; }
#save.unsaved .unsaved-dot { display: inline-block; }

/* the project picker: the open project's name; its list opens upwards */
.picker { position: relative; display: flex; min-width: 0; flex: 0 1 auto; }
#project { min-width: 0; max-width: 220px; gap: 6px; padding: 0 8px 0 10px; font-weight: 500; }
#project-name { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#project .chev { flex: none; width: 12px; height: 12px; stroke: var(--muted); stroke-width: 1.6; }
#project:hover .chev, #project[aria-expanded="true"] .chev { stroke: var(--text); }
#project[aria-expanded="true"] { background: #f1f4f7; border-color: #c9cfd6; }
#project-list {
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 12;
  width: 260px;
  max-height: min(62vh, 520px);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 10px 36px rgba(20, 30, 40, 0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.pick-scroll { min-height: 0; overflow-y: auto; padding: 4px 4px 2px; display: flex; flex-direction: column; }
.pick-group { padding: 8px 10px 3px; font-size: 11px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: #8a949e; }
.pick-note { padding: 4px 10px 6px; font-size: 12.5px; color: var(--muted); }
.pick-sep { flex: none; height: 1px; margin: 4px 2px; background: var(--line); }
.pick { flex: none; width: 100%; height: 32px; padding: 0 10px; border: none; border-radius: 6px; gap: 8px; justify-content: space-between; text-align: left; }
.pick:hover, .pick:focus-visible { background: #f1f4f7; outline: none; }
.pick[aria-selected="true"] { background: #edf3fa; color: var(--accent); font-weight: 500; }
.pick-name { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pick .unsaved-dot { display: inline-block; }
.pick-foot { margin: 0 6px 4px; }
.pick-new { width: auto; margin: 0 4px 4px; justify-content: flex-start; gap: 7px; color: var(--muted); }
.pick-new svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.pick-new:hover { color: var(--text); }
.pick-filter { flex: none; height: 30px; margin: 2px 2px 4px; padding: 0 9px; border: 1px solid var(--line); border-radius: 6px; font: inherit; font-size: 13px; }
.pick-filter:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

/* "Saved": a quiet note beside Save that fades out */
#run-controls { position: relative; }
#save-note {
  position: absolute;
  left: calc(100% + 4px);
  top: 50%;
  transform: translateY(-50%);
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg);
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s ease 0.2s;
}
#save-note.show { opacity: 1; transition: none; }
#save-note::before { content: "✓ "; color: #2e9d5b; }
#save-note:empty { display: none; }

#project-status { flex: none; padding: 5px 12px; color: var(--muted); border-top: 1px solid var(--line); font-size: 12px; }
#project-status:empty { display: none; }
#project-status.error { color: #b42318; }

/* the name dialog: a title, one field, two buttons */
#name-dialog { width: min(340px, calc(100% - 32px)); padding: 18px; border: 1px solid var(--line); border-radius: 12px; color: var(--text); box-shadow: 0 16px 64px #14202c33; }
#name-dialog::backdrop { background: #15213240; }
#name-dialog h2 { margin: 0 0 12px; font-size: 15px; font-weight: 600; }
#name-input { width: 100%; height: 34px; padding: 0 10px; font: inherit; border: 1px solid #c9cfd6; border-radius: 6px; }
#name-input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
#name-input[aria-invalid="true"] { outline-color: #d4574a; }
#name-error { margin: 6px 0 0; font-size: 12px; color: #b42318; }
#name-error:empty { display: none; }
.dialog-buttons { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

/* narrow screens: viewer on top, editor below */
@media (max-width: 820px) {
  header {
    padding: 0 8px 0 10px;
  }
  .actions {
    gap: 5px;
  }
  #download .label {
    display: none;
  }
  #download {
    width: 32px;
    padding: 0;
    justify-content: center;
  }
  .menu button {
    height: 38px;
  }
  #controls {
    padding-left: 8px;
    padding-right: 8px;
    gap: 8px;
    flex-wrap: wrap;
  }
  #controls:has(#replay:not([hidden])) #threads .unit {
    display: none;
  }
  #project-list {
    position: fixed;
    left: 8px;
    right: 8px;
    bottom: calc(var(--bar-h, 46px) + 6px);
    width: auto;
    max-height: min(72vh, 640px);
  }
  .pick {
    height: 40px;
  }
  #replay {
    flex: 1;
    max-width: none;
    gap: 4px;
  }
  #scrub {
    min-width: 30px;
  }
  .pop {
    right: 8px;
  }
}

/* a stand-in (?standin=, store.js): headless, nobody looks at it; the viewer
   fills the window, so that screenshots have its proportions */
html.standin header,
html.standin #left,
html.standin #split,
html.standin #hud,
html.standin #controls,
html.standin #link-pop {
  display: none !important;
}
html.standin main {
  flex-direction: row;
}
html.standin #right {
  flex: 1;
  height: auto;
}

/* phones: Run, Code (its icon), Save and the picker share one row; the
   replay, when there is one, gets the row above it */
@media (max-width: 520px) {
  #replay {
    order: -1;
    flex: 1 0 100%;
    max-width: none;
  }
  #scrub {
    max-width: none;
  }
  #code-toggle {
    width: 34px;
    padding: 0;
    justify-content: center;
  }
  #code-toggle .label {
    display: none;
  }
  #threads .unit {
    display: none;
  }
  #project {
    max-width: 42vw;
  }
  #parts {
    width: 196px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #left {
    transition: none;
  }
}

/* ---------------------------------------------------------------- tule */

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

#right {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* the sidebar's top: back to your projects, and this project's name */
.project-head { flex: none; padding: 12px 12px 6px; }
.side-foot { flex: none; padding: 8px 14px; border-top: 1px solid var(--line); }
.side-foot .machine { font-size: 11.5px; }
.project-head .back {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin-left: -2px;
  padding: 2px 4px 2px 0;
  border-radius: 5px;
  color: var(--muted);
  font-size: 12.5px;
  text-decoration: none;
}
.project-head .back:hover { color: var(--text); }
.project-head .back svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.project-name { margin-top: 8px; font-size: 16px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.machine {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--muted);
}

.machine .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #b8c0c8;
}

.machine[data-state="running"] .dot { background: #3aa45b; }
.machine[data-state="starting"] .dot { background: #e0a526; }

#outputs {
  width: 240px;
  flex: none;
  border-right: 1px solid var(--line);
  background: var(--panel);
  overflow-y: auto;
  padding: 8px;
}

.outputs-head {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--muted);
  padding: 4px 6px 8px;
}

.output {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  height: 32px;
  padding: 0 8px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: none;
  text-align: left;
}
.output:hover { background: #e9edf1; }
.output-icon { flex: none; width: 15px; height: 15px; fill: none; stroke: var(--muted); stroke-width: 1.3; stroke-linejoin: round; }
.output-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.output small { flex: none; color: var(--muted); font-size: 11.5px; font-variant-numeric: tabular-nums; }
.output small[data-tone="error"] { color: var(--danger); }
.output small[data-tone="warning"] { color: #a3610b; }
.output small[data-tone="live"] { color: #2f8a4c; }
.output small[data-tone="ok"] { color: #2f8a4c; }
.output[aria-selected="true"] { background: var(--bg); border-color: var(--line); }
.output[aria-selected="true"] .output-icon { stroke: var(--accent); }

/* the selected output's title, above the view (overlays show theirs in the legend) */
.caption {
  position: absolute;
  top: 12px;
  left: 14px;
  max-width: calc(100% - 420px);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  pointer-events: none;
}
@media (max-width: 640px) { .caption { display: none; } }

.outputs-empty {
  color: var(--muted);
  font-size: 12.5px;
  padding: 0 6px;
}

.pick-label {
  position: absolute;
  pointer-events: none;
  font: 12px/1.3 var(--mono);
  background: rgba(31, 41, 51, 0.88);
  color: #fff;
  padding: 3px 7px;
  border-radius: 4px;
  white-space: nowrap;
}

#sequence {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

#sequence[hidden] { display: none; }
#sequence { flex-direction: column; align-items: stretch; gap: 6px; }
.seq-row { display: flex; align-items: center; gap: 10px; }
#scrub { flex: 1; max-width: none; }
#frame { font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.live { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; color: #1d7a45; }
.live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #2e9d5b; animation: blink 1.2s ease-in-out infinite; }
.plot { display: flex; flex-direction: column; gap: 3px; }
.plot-svg { display: block; width: 100%; height: 64px; cursor: pointer; touch-action: none; }
.plot-base { stroke: var(--line); stroke-width: 1; }
.plot-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.plot-dot { stroke: var(--panel); stroke-width: 2; }
.plot-cursor { stroke: #23344a; stroke-width: 1; stroke-dasharray: 3 2; }
.plot-hover { stroke: #8a949e; stroke-width: 1; }
.plot-axis { font: 10px var(--sans); fill: var(--muted); }
.plot-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 14px; font-size: 12px; color: var(--muted); }
.plot-frame { color: var(--text); font-weight: 500; }
.plot-key { display: inline-flex; align-items: center; gap: 5px; }
.plot-key i { width: 10px; height: 3px; border-radius: 2px; }
.plot-key b { color: var(--text); font-weight: 500; font-variant-numeric: tabular-nums; }
.plot-key small { font-size: 11px; }
#play.on { background: #23344a; color: #fff; }

#play svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

@media (max-width: 640px) {
  main { flex-direction: column; }
  #outputs { width: auto; max-height: 30vh; border-right: 0; border-bottom: 1px solid var(--line); }
}

/* ---------------------------------------------------------------- overlays */

.legend { font-size: 12.5px; }
.legend-row {
  display: grid;
  grid-template-columns: 12px auto 1fr;
  align-items: start;
  column-gap: 7px;
  padding: 4px 6px;
  border-radius: 5px;
}
.legend-row:hover { background: #edf1f5; }
.swatch {
  flex: none;
  margin-top: 2px;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--c);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.15);
}
.swatch.hatch { background: repeating-linear-gradient(135deg, var(--c) 0 3px, color-mix(in srgb, var(--c) 35%, #fff) 3px 6px); }
.swatch.arrow { background: none; box-shadow: none; position: relative; }
.swatch.arrow::before { content: ""; position: absolute; left: 5px; top: 0; width: 2px; height: 8px; background: var(--c); }
.swatch.arrow::after { content: ""; position: absolute; left: 2px; top: 7px; border: 4px solid transparent; border-top: 5px solid var(--c); border-bottom: 0; }
.legend-kind {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #66717d;
}
.legend-kind.error { color: #b42318; }
.legend-kind.warning { color: #9a5b00; }
.legend-kind.info { color: #1c5cab; }
.legend-label { min-width: 0; overflow-wrap: anywhere; line-height: 1.35; }
.legend-faces { grid-column: 3; color: var(--muted); font: 11px/1.3 var(--mono); }

#marks { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.mark-chip {
  position: absolute;
  left: 0;
  top: 0;
  padding: 2px 6px;
  border-radius: 4px;
  background: #eb6834;
  color: #fff;
  font: 600 11.5px/1.3 var(--sans);
  white-space: nowrap;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

@media (max-width: 640px) {
}

/* ---------------------------------------------------------------- annotations */

#ink { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; }
#ink.drawing { pointer-events: auto; cursor: crosshair; touch-action: none; }
#stage.annotating #parts { display: none; }

.annot {
  position: absolute;
  z-index: 3;
  top: 46px;
  right: 10px;
  width: 300px;
  max-height: calc(100% - 82px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 10px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(6px);
  box-shadow: 0 6px 24px rgba(20, 30, 40, 0.12);
  font-size: 12.5px;
}
.annot-head { display: flex; align-items: center; justify-content: space-between; }
.annot-head b { font-weight: 600; }
.annot .close { border: none; background: none; font-size: 19px; width: 24px; height: 24px; padding: 0; justify-content: center; color: var(--muted); }
.annot-tools { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.annot-tools button { height: 26px; font-size: 12px; padding: 0 8px; }
.annot-gap { flex: 1; }
.seg { display: inline-flex; }
.seg button { border-radius: 0; }
.seg button:first-child { border-radius: 6px 0 0 6px; }
.seg button:last-child { border-radius: 0 6px 6px 0; margin-left: -1px; }
.seg button[aria-pressed="true"] { background: #23344a; border-color: #23344a; color: #fff; }
.ink-colors { display: inline-flex; gap: 4px; }
.annot .ink-color { width: 20px; height: 20px; padding: 0; border-radius: 50%; border: 2px solid #fff; background: var(--c); box-shadow: 0 0 0 1px var(--line); }
.annot .ink-color[aria-pressed="true"] { box-shadow: 0 0 0 2px var(--c); }
.annot-hint { margin: 0; color: var(--muted); font-size: 12px; }
.annot-label-row { display: flex; gap: 6px; }
.annot-label-row input, .annot textarea {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 12.5px;
  padding: 5px 8px;
  border: 1px solid #c9cfd6;
  border-radius: 6px;
}
.annot textarea { resize: vertical; min-height: 44px; }
.annot-label-row input:focus, .annot textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.annot-label-row button { flex: none; }
#annot-picks:empty { display: none; }
.annot-pick { display: grid; grid-template-columns: 12px auto 1fr auto; align-items: center; column-gap: 7px; padding: 2px 0; }
.annot-pick-label { font-weight: 500; }
.annot-pick small { color: var(--muted); font: 11px/1.3 var(--mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.annot .annot-x { border: none; background: none; height: 20px; width: 20px; padding: 0; justify-content: center; color: var(--muted); font-size: 15px; }
.annot-save { display: flex; align-items: center; gap: 8px; }
#annot-why { color: #9a5b00; font-size: 12px; }
.annot-done { padding: 8px; border-radius: 6px; background: #eef8f1; border: 1px solid #cde9d6; display: flex; flex-direction: column; gap: 4px; }
.annot-done code { font: 12px var(--mono); }
.annot-done.error { background: #fdf0ee; border-color: #f3cfc9; color: #b42318; }
.annot-done.error > div { display: none; }
.annot-tell { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.annot-say { font-weight: 500; }
.annot-tell button { height: 22px; font-size: 11.5px; padding: 0 7px; }
.annot-summary { color: var(--muted); font-size: 11.5px; }
.annot-done.error .annot-summary { color: #b42318; }
#annot-past summary { cursor: pointer; color: var(--muted); font-size: 12px; }
#annot-past-list { display: flex; flex-direction: column; gap: 2px; margin-top: 4px; max-height: 180px; overflow-y: auto; }
.annot-past-item { display: flex; flex-direction: column; align-items: flex-start; height: auto; padding: 5px 7px; border-color: transparent; background: none; text-align: left; gap: 1px; }
.annot-past-item:hover { background: #f1f4f7; }
.annot-past-item b { font: 500 12px var(--mono); }
.annot-past-item small { color: var(--muted); font-size: 11.5px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.annot-shown {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  max-width: min(560px, calc(100% - 20px));
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 6px 6px 12px;
  border-radius: 8px;
  background: rgba(31, 41, 51, 0.9);
  color: #fff;
  font-size: 12px;
}
.annot-shown span { overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.annot-shown button { flex: none; height: 24px; font-size: 12px; background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.35); }

@media (max-width: 640px) {
  .annot { top: auto; bottom: 8px; left: 8px; right: 8px; width: auto; max-height: 55%; }
  #hud .label { display: none; }
  #stage.annotating .legend { display: none; }
}

/* ---------------------------------------------------------------- the outputs list */

#outputs { padding: 0; display: flex; flex-direction: column; }
#outputs .outputs-head { flex: none; padding: 10px 14px 4px; }
.side-pane { flex: 1; min-height: 0; overflow-y: auto; padding: 4px 8px 8px; }
.dl .menu button { justify-content: space-between; }

/* medium widths (tablets, a narrow window): the sidebar gets narrower; phones stack (640px below) */
@media (max-width: 900px) and (min-width: 641px) {
  #outputs { width: 200px; }
}

/* the strip under the view: the output's info, a value scale, findings and conditions (overlay.js) */
.strip { flex: none; max-height: 34%; overflow-y: auto; padding: 10px 14px; border-top: 1px solid var(--line); background: var(--panel); }
.strip .legend-head { padding: 0 6px 8px; color: var(--text); font-size: 13px; font-weight: 500; }
.strip .legend-head:empty { display: none; }
.strip .legend-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 0 14px; }
.legend-info { display: flex; flex-wrap: wrap; gap: 6px 28px; margin: 0 6px 10px; }
.legend-info dt { color: var(--muted); font-size: 11px; }
.legend-info dd { margin: 0; font-size: 13px; font-variant-numeric: tabular-nums; }
.legend-scale { display: flex; align-items: center; gap: 8px; margin: 0 6px 10px; font-size: 12.5px; }
.legend-scale-label { color: var(--text); margin-right: 4px; }
.legend-scale small { color: var(--muted); font-size: 11.5px; font-variant-numeric: tabular-nums; }
.legend-ramp { flex: 0 1 220px; height: 10px; border-radius: 3px; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12); }

/* in the sidebar the output's row names the assembly: the tree's header only offers "Show all" */
#parts .parts-title { display: none; }
#parts:not(.has-hidden) .parts-head { display: none; }
#parts .parts-head { padding: 2px 4px 0 6px; min-height: 24px; }

.output-fold { flex: none; width: 13px; height: 13px; margin-left: -2px; fill: none; stroke: var(--muted); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; transition: transform 0.15s; }
.output.open .output-fold { transform: rotate(90deg); }