/* bomb.sh-style neon + deep black + minimal restyle of the harness. Everything
   new lives here — demo.css stays untouched for the other demo pages (this
   sheet is only linked from harness.html). Dependency-free plain DOM; every
   control keeps an id or data-attribute anchor so tests and humans target the
   same things.

   Palette (neon on deep black):
      surface #000000 · panel #0a0a0a · hairline #1c1c1c
      text #e0e0e0 · muted #6a6a6a · hover surface #111111
      accent neon #00ff87 (mint) · secondary neon #00e5ff (cyan) */

/* display:flex/grid below would beat the UA's [hidden] rule otherwise. */
[hidden] { display: none !important; }

/* ---- shell (overrides the shared demo.css body chrome) ---- */
html, body { height: 100%; }
body {
  margin: 0;
  background: #000000;
  color: #e0e0e0;
  font-family: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  overflow: hidden;
}

#app {
  display: grid;
  height: 100vh;
  grid-template-columns: 44px 250px minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr) auto 24px;
  grid-template-areas:
    "activity sidebar main"
    "activity sidebar output"
    "statusbar statusbar statusbar";
}
/* Explorer toggled off from the activity bar: the sidebar column collapses. */
#app.sidebar-hidden { grid-template-columns: 44px 0 minmax(0, 1fr); }

/* Thin dark scrollbars, neon thumb on hover. */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: #1c1c1c; }
::-webkit-scrollbar-thumb:hover { background: #00ff87; }
::-webkit-scrollbar-track, ::-webkit-scrollbar-corner { background: #000000; }

/* ---- base controls (scoped to this page's roots) ---- */
#app button, #context-menu button {
  font: inherit;
  color: #e0e0e0;
  background: #0a0a0a;
  border: 1px solid #1c1c1c;
  border-radius: 0;
  padding: 3px 10px;
  cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
#app button:hover:not(:disabled) { color: #00ff87; border-color: #00ff87; background: #000000; }
#app button:focus-visible, #context-menu button:focus-visible {
  outline: 1px solid #00e5ff;
  outline-offset: 0;
}
#app button:disabled { opacity: 0.35; cursor: default; }

#app input {
  font: inherit;
  color: #e0e0e0;
  background: #000000;
  border: 1px solid #1c1c1c;
  border-radius: 0;
  padding: 3px 8px;
}
#app input:focus { outline: none; border-color: #00ff87; }

/* ---- activity bar: two icon buttons, Explorer (default active) + Output ---- */
#activity-bar {
  grid-area: 1 / 1 / 3 / 2;
  background: #000000;
  border-right: 1px solid #1c1c1c;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding-top: 2px;
}
.activity-btn {
  position: relative;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: none !important;
  border: none !important;
  border-radius: 0 !important;
  color: #6a6a6a;
}
.activity-btn:hover { color: #00ff87 !important; background: #0a0a0a !important; }
.activity-btn:focus-visible { outline: 1px solid #00e5ff !important; outline-offset: -2px; }
.activity-btn.active { color: #00ff87; }
/* bomb.sh active-view indicator: a 2px neon bar hugging the left edge. */
.activity-btn.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: #00ff87;
}

/* files icon: three stacked lines of decreasing width */
.icon-files {
  display: block;
  width: 16px;
  height: 16px;
  background:
    linear-gradient(currentColor, currentColor) 1px 2px  / 14px 2px no-repeat,
    linear-gradient(currentColor, currentColor) 1px 7px  / 10px 2px no-repeat,
    linear-gradient(currentColor, currentColor) 1px 12px / 12px 2px no-repeat;
}
/* output icon: terminal chevron + underscore, pure CSS */
.icon-output { position: relative; display: block; width: 16px; height: 16px; }
.icon-output::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 4px;
  width: 7px;
  height: 7px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: rotate(-45deg); /* the ">" chevron */
}
.icon-output::after {
  content: "";
  position: absolute;
  left: 4px;
  bottom: 3px;
  width: 9px;
  height: 2px;
  background: currentColor; /* the "_" underscore */
}

/* ---- main pane: the app grid's middle column. Rows: 35px tab bar, the
     editor (flexible), and the OUTPUT panel docked at the bottom (collapses
     to zero when toggled off from the activity bar). Anchors the #status
     toast (absolute, top: 35px). */
#main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: 35px minmax(0, 1fr) auto;
  position: relative;
  min-height: 0;
  min-width: 0;
}

/* ---- tabs + editor pane: one tab per open file; the editor is gutter +
     textarea. Tab styling: active tab #000000 (merges with editor bg) with a 1px
    top accent (#00ff87), inactive #0a0a0a; dirty indicator (● dot) when the
    textarea content differs from the saved value (also in the tab title). */
/* #editor-body is a transparent wrapper: display:contents promotes the
   gutter, the highlight mirror, and the textarea into
   grid items of #editor (placed explicitly below). [hidden] still collapses
   it because display:none !important wins. */
#editor-body { display: contents; }
#file-note { grid-row: 1; grid-column: 1 / -1; }
#gutter { grid-row: 2; grid-column: 1; }
#hl-wrap, #content { grid-row: 2; grid-column: 2; }
#tab-bar {
  grid-row: 1;
  display: flex;
  align-items: stretch;
  background: #0a0a0a;
  border-bottom: 1px solid #1c1c1c;
  min-width: 0;
}
#tabs {
  flex: 1;
  display: flex;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
#tabs::-webkit-scrollbar { display: none; }
.tab {
  display: flex;
  align-items: center;
  gap: 6px;
  max-width: 240px;
  padding: 0 8px 0 14px;
  background: #0a0a0a;
  border-right: 1px solid #1c1c1c;
  border-top: 2px solid transparent;
  color: #6a6a6a;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.tab.open { background: #000000; color: #e0e0e0; }
.tab.active {
  background: #000000;
  color: #00ff87;
  border-top: 2px solid #00ff87;
}
.tab:hover { background: #111111; }
.tab-label {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  pointer-events: none;
}
/* ● dirty marker: rendered on every tab, shown only while buffer ≠ saved */
.tab-dirty-dot { display: none; width: 8px; height: 8px; border-radius: 50%; background: #00e5ff; flex: none; }
.tab.dirty .tab-dirty-dot { display: block; }
.tab-close {
  background: none !important;
  border: none !important;
  padding: 0 2px !important;
  color: inherit;
  width: 20px;
  height: 20px;
  line-height: 20px;
  text-align: center;
  border-radius: 0 !important;
}
.tab-close:hover { color: #ff3860; }
#tab-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 6px;
}
#btn-save, #btn-editor-delete {
  background: none !important;
  border: none !important;
  padding: 4px 6px !important;
  color: #6a6a6a;
}
#btn-save:hover, #btn-editor-delete:hover { color: #00ff87; }

/* ---- editor: gutter + textarea, monospace on pure black ---- */
#editor {
  grid-row: 2;
  display: grid;
  grid-template-columns: 4ch minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr); /* file-note banner row, then the edit area */
  overflow: hidden;
  position: relative;
  min-height: 0;
  background: #000000;
}
#gutter {
  overflow: hidden;
  padding: 6px 0;
  text-align: right;
  color: #1f3d2e;
  background: #000000;
  border-right: 1px solid #1c1c1c;
  user-select: none;
}
#gutter-inner { padding-right: 8px; transform: translateY(0); will-change: transform; }
#content {
  font: inherit;
  color: #e0e0e0;
  background: #000000;
  border: none;
  outline: none;
  resize: none;
  padding: 6px 0 24px 12px;
  white-space: pre;
  overflow: auto;
  caret-color: #00ff87;
}
#content::selection { background: rgba(0, 255, 135, 0.25); color: #e0e0e0; }

/* ---- output panel: guest runner, bottom dock (inside #main's third row;
     grid-area 3/1 replaces the stale 2/3/3/4 — #output lives inside #main,
     not directly in #app's grid. [hidden] still wins via !important. */
#output {
  grid-area: 3 / 1;
  display: grid;
  grid-template-rows: 35px minmax(0, 1fr);
  border-top: 1px solid #1c1c1c;
  background: #0a0a0a;
  min-height: 140px;
}
#output-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px;
  background: #000000;
  border-bottom: 1px solid #1c1c1c;
}
#output-label {
  color: #00ff87;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 11px;
  font-weight: bold;
}
#entry {
  flex: 1;
  max-width: 400px;
}
#btn-run { color: #00ff87; border-color: #00ff87; font-weight: bold; }
#btn-run:hover:not(:disabled) { background: #00ff87 !important; color: #000000 !important; }
#exit-badge { color: #6a6a6a; font-size: 11px; }
#output-log {
  overflow: auto;
  padding: 8px 12px;
  font-size: 12px;
  line-height: 1.5;
}
#stdout { white-space: pre-wrap; color: #e0e0e0; }
#stdout:empty::after { content: "— no output —"; color: #333333; font-style: italic; }
#stderr { white-space: pre-wrap; color: #ff3860; margin-top: 4px; }

/* ---- status bar (bomb.sh style: neon accents on black) ---- */
#statusbar {
  grid-area: 3 / 1 / 4 / 4;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 12px;
  background: #000000;
  border-top: 1px solid #1c1c1c;
  color: #6a6a6a;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
#sb-left, #sb-right { display: flex; align-items: center; gap: 12px; }
#sb-left { flex: 1; }
#sb-right { justify-content: flex-end; }
#sb-brand { color: #00ff87; font-weight: bold; }
#sb-boot { color: #e0e0e0; }
#sb-boot.error { color: #ff3860; }
#sb-encoding { color: #00e5ff; }
#sb-exit.ok { color: #00ff87; }
#sb-exit.err { color: #ff3860; }
#sb-selected { max-width: 240px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---- inline prompt row: one shared row for new-file/new-folder/rename ----
   Auto-placed into the sidebar's third row; the tree flows to the 1fr row. */
/* Two-row grid: the label gets a full-width line of its own and the input
   shares the second line with the buttons. One flex line can't fit label
   (~112px basis) + buttons (138px) + a usable input in 225px — with the
   input at flex-basis 0% it wins no shrink and no grow, ending at 18px of
   pure padding/border. Stacking the label above the controls gives the
   input ~57px of real typing width and keeps the path context visible. */
#inline-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 4px 6px;
  align-items: center;
  padding: 6px 12px;
  background: #0a0a0a;
  border-bottom: 1px solid #00ff87;
}
#inline-label {
  grid-column: 1 / -1;
  color: #00e5ff;
  font-size: 11px;
  text-transform: uppercase;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
/* min-width:0 lets the input shrink inside the 250px sidebar — without it
   the row overflows under #editor and swallows clicks meant for its buttons */
#inline-input { grid-column: 1; min-width: 0; }
#inline-ok { grid-column: 2; color: #00ff87; border-color: #00ff87; }
#inline-cancel { grid-column: 3; color: #ff3860; border-color: #1c1c1c; }

/* ---- confirmation row (destructive ops) ---- */
#confirm-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: #0a0a0a;
  border-bottom: 1px solid #ff3860;
}
#confirm-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #ff3860; font-size: 11px; text-transform: uppercase; }
#confirm-yes { color: #ff3860; border-color: #ff3860; }
#confirm-yes:hover { background: #ff3860 !important; color: #000000 !important; }
#confirm-no { color: #6a6a6a; border-color: #1c1c1c; }

/* ---- status line (kept for tests; styled as a toast near the editor top) ---- */
#status {
  position: absolute;
  top: 35px;
  left: 50%;
  transform: translateX(-50%);
  background: #0a0a0a;
  border: 1px solid #ff3860;
  color: #ff3860;
  padding: 6px 14px;
  z-index: 100;
  font-size: 12px;
  max-width: 80%;
  text-align: center;
  /* passive toast — must never swallow clicks aimed at tabs/editor underneath */
  pointer-events: none;
}
#status:empty { display: none; }

/* ---- context menu ---- */
#context-menu {
  position: fixed;
  z-index: 200;
  background: #0a0a0a;
  border: 1px solid #00ff87;
  min-width: 160px;
  padding: 4px 0;
  box-shadow: 0 0 20px rgba(0, 255, 135, 0.15);
}
#context-menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: none !important;
  border: none !important;
  padding: 6px 16px;
  color: #e0e0e0;
}
#context-menu button:hover { background: #00ff87 !important; color: #000000 !important; }
#context-menu .menu-sep { height: 1px; background: #1c1c1c; margin: 4px 0; }

/* ---- sidebar (explorer) ---- */
#sidebar {
  grid-area: 1 / 2 / 3 / 3;
  display: grid;
  /* Explicit single column pinned to the sidebar's width. Without it the
     implicit "auto" column track grows to the max-content of its rows —
     e.g. the 470px-wide inline/confirm rows overflow into #editor, which then
     intercepts the pointer over the row's buttons (Playwright + humans both
     hit the editor instead of Create/Delete). minmax(0,1fr) lets flex rows
     shrink; .tree-row ellipsizes and #tree scrolls. */
  grid-template-columns: minmax(0, 1fr);
  /* title | section title | inline create row | confirm row | tree — the
     inline/confirm rows are [hidden] most of the time and collapse to 0. */
  grid-template-rows: 35px auto auto auto minmax(0, 1fr);
  background: #050505;
  border-right: 1px solid #1c1c1c;
  min-width: 0;
}
#sidebar-title {
  display: flex;
  align-items: center;
  padding: 0 16px;
  color: #6a6a6a;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 11px;
  border-bottom: 1px solid #1c1c1c;
}
#section-title {
  padding: 8px 16px 4px;
  color: #00ff87;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 12px;
  font-weight: bold;
}
#tree {
  grid-row: 5;
  overflow: auto;
  padding-bottom: 20px;
}

/* ---- tree rows ---- */
.tree-row {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 24px;
  padding: 0 8px;
  cursor: pointer;
  color: #e0e0e0;
  white-space: nowrap;
}
.tree-row:hover { background: #111111; }
.tree-row.selected { background: rgba(0, 255, 135, 0.08); color: #00ff87; }
.tree-row .row-icon { margin-right: 4px; }
.tree-row .twisty {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #6a6a6a;
  font-size: 10px;
  transition: transform .15s ease;
}
.tree-row .twisty.open { transform: rotate(90deg); }
.tree-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* file icons — colored dots/diamonds for a minimal look */
.row-icon {
  width: 8px;
  height: 8px;
  display: inline-block;
  flex: none;
  transform: rotate(45deg);
}
.icon-folder { transform: none; background: #6a6a6a; width: 12px; height: 10px; border-bottom: 2px solid currentColor; }
.ext-js, .ext-cjs, .ext-mjs { background: #ffd700; } /* amber */
.ext-ts, .ext-mts, .ext-cts { background: #00e5ff; } /* neon cyan */
.ext-json { background: #ffbf00; }
.ext-md { background: #b3b3ff; }
.ext-txt { background: #00ff87; } /* mint */
.ext-other { background: #444444; }

/* ---- empty editor state ---- */
#editor-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #333333;
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
  pointer-events: none;
}
#empty-title { color: #1c1c1c; font-size: 24px; font-weight: bold; }
#file-note { color: #6a6a6a; font-size: 11px; margin-top: 8px; }

/* ---- download button (neon outline) ---- */
#btn-download {
  color: #00ff87;
  border-color: #00ff87;
  background: #000000;
  font-weight: bold;
}
#btn-download:hover:not(:disabled) {
  background: #00ff87 !important;
  color: #000000 !important;
  box-shadow: 0 0 12px rgba(0, 255, 135, 0.4);
}

/* ---- microlighter highlight mirror (code files) ----
   A <pre><code> sits in #content's grid cell BEHIND the textarea: identical
   font, line-height, padding and white-space, scroll synced via its own
   scrollTop/scrollLeft. Tokens are painted through the CSS Custom Highlight
   API, so the mirror's plain text color matches the textarea's and the
   textarea text goes transparent (caret stays mint) while hl-on. */
#hl-wrap, #hl-mirror {
  margin: 0;
  border: 0;
  padding: 0;
  font: inherit;
  line-height: 1.5;
  white-space: pre;
  tab-size: 8;
}
#hl-wrap {
  overflow: hidden;
  padding: 6px 0 24px 12px;
  color: #e0e0e0;
  background: #000000;
  pointer-events: none;
  user-select: none;
}
#hl-mirror { display: block; }
/* While the mirror is live, the textarea renders nothing but the caret and
   the native selection band — the mirror supplies every glyph. */
#editor-body.hl-on #content { background: transparent; color: transparent; }
#editor-body.hl-on #content::selection { background: rgba(0, 255, 135, 0.25); color: transparent; }
/* Line-height on both surfaces (and the gutter) keeps glyph rows aligned. */
#content, #gutter { line-height: 1.5; }

/* ---- neon ::highlight() theme (our own; no stock microlighter theme) ----
   microlighter flattens TextMate scopes into these categories and registers
   each as a CSS Custom Highlight over the mirror text. Palette: mint
   keywords, cyan strings, dim italic comments, grey punctuation/numbers,
   pale mint/cyan tints for functions/types. */
::highlight(comment), ::highlight(quote) { color: #4a4a4a; font-style: italic; }
::highlight(keyword), ::highlight(storage), ::highlight(at-rule), ::highlight(doctype),
::highlight(important), ::highlight(section) { color: #00ff87; }
::highlight(operator) { color: #b0b0b0; }
::highlight(punctuation) { color: #6a6a6a; }
::highlight(string), ::highlight(regexp), ::highlight(attribute-value), ::highlight(link),
::highlight(raw), ::highlight(character-entity) { color: #00e5ff; }
::highlight(numeric), ::highlight(boolean), ::highlight(constant), ::highlight(symbol),
::highlight(anchor), ::highlight(entity) { color: #e0e0e0; }
::highlight(function), ::highlight(decorator), ::highlight(animation),
::highlight(selector) { color: #7dffc4; }
::highlight(type), ::highlight(support) { color: #86e3f2; }
::highlight(variable), ::highlight(interpolation) { color: #e0e0e0; }
::highlight(property), ::highlight(key), ::highlight(attribute-name) { color: #00e5ff; }
::highlight(tag) { color: #00ff87; }
::highlight(inserted) { color: #00ff87; }
::highlight(deleted) { color: #ff3860; }