/* ─────────────────────────────────────────────
   edison-hud.css — Lab HUD 1/4 (issue #189): the editor's chrome in the
   landing's language. The top bar is a 40 px black instrument strip of
   hairline cells, the parts sidebar is black, and the base font is DM Mono.
   Loaded after theme-edison.css, and every rule is scoped to
   html[data-ui="edison"], so classic is untouched. Mockup and source:
   docs/design/editor-hud/. The caps labels are the design: this file (and
   the later edison-hud-*.css) may use text-transform: uppercase, approved
   by Aarmen (edison/DESIGN.md "Editor: Lab HUD"). The DOM text stays as
   written. edison/skin.js adds the toggles' .hud-led and the RUNNING cell.
───────────────────────────────────────────── */

html[data-ui="edison"] {
  --hud-k: #101010;      /* chrome */
  --hud-rule: #242424;   /* hairlines between cells */
  --hud-line: #676767;   /* 1 px outlines only (3.6:1 as text) */
  --hud-ink: #F4F4F4;
  --hud-grey: #8A8A8A;   /* grey text, 5.6:1 on --hud-k */
  --hud-hover: #1A1A1A;
  --hud-led-off: #3A3A3A;
  --hud-pink: #FF3D7F;   /* status only: a fault */
  --hud-blue: #3D7BFF;   /* status only: on */
  --hud-mono: 'DM Mono', ui-monospace, Menlo, monospace;
  --font-ui: var(--hud-mono);   /* the skin's base font */
}

/* ── Type ───────────────────────────────────── */
html[data-ui="edison"] body, html[data-ui="edison"] button, html[data-ui="edison"] input,
html[data-ui="edison"] textarea { font-family: var(--hud-mono); }
html[data-ui="edison"] body { -webkit-font-smoothing: antialiased; }

/* ── Top bar: one strip of hairline cells ───── */
html[data-ui="edison"] #topbar {
  display: flex; align-items: stretch; height: 40px; padding: 0;
  background: var(--hud-k); color: var(--hud-ink);
  border-bottom: 1px solid var(--hud-rule); box-shadow: none;
}
html[data-ui="edison"] #topbar .topbar-left-group {
  display: flex; align-items: center; gap: 0; flex: 0 1 auto; min-width: 0;
  border-right: 1px solid var(--hud-rule);
}
html[data-ui="edison"] #topbar .topbar-center,
html[data-ui="edison"] #topbar .topbar-actions {
  display: flex; align-items: stretch; gap: 0; flex: none; margin-left: auto;
  border-left: 1px solid var(--hud-rule);
}
html[data-ui="edison"] #topbar .topbar-brand {
  align-self: stretch; padding: 0 16px; border-right: 1px solid var(--hud-rule);
  font: 500 13px/1 var(--hud-mono); letter-spacing: 0.14em; text-transform: uppercase;
}
html[data-ui="edison"] #topbar .topbar-brand svg { display: none; }
/* The name cell: a FILE key, then the name (it shrinks first, with an ellipsis). */
html[data-ui="edison"] #topbar .topbar-name-sep { flex: none; padding-left: 16px; font-size: 0; }
html[data-ui="edison"] #topbar .topbar-name-sep::before {
  content: 'File'; font: 400 11px/1 var(--hud-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--hud-grey);
}
html[data-ui="edison"] #topbar #circuit-name-field {
  min-width: 0; max-width: none; margin: 0 12px 0 6px; padding: 3px 4px;
  border: 1px solid transparent; border-radius: 0; background: transparent; color: var(--hud-ink);
  font: 400 11px/1.4 var(--hud-mono); letter-spacing: 0.12em; text-transform: uppercase;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
html[data-ui="edison"] #topbar #circuit-name-field:hover { border-color: var(--hud-rule); background: transparent; }
html[data-ui="edison"] #topbar #circuit-name-field:focus { border-color: var(--hud-line); background: var(--hud-hover); box-shadow: none; }

/* Every button is a cell. Caps from CSS only: the text is as written. */
html[data-ui="edison"] #topbar button {
  display: inline-flex; align-items: center; gap: 8px; flex: none; height: 100%; margin: 0; padding: 0 12px;
  background: transparent; color: var(--hud-ink); border: 0; border-right: 1px solid var(--hud-rule); border-radius: 0;
  font: 400 11px/1 var(--hud-mono); letter-spacing: 0.12em; text-transform: uppercase; white-space: nowrap;
  box-shadow: none; transform: none;
}
html[data-ui="edison"] #topbar button:hover { background: var(--hud-hover); color: var(--hud-ink); border-color: var(--hud-rule); }
html[data-ui="edison"] #topbar button:focus-visible { outline: 1px solid var(--hud-ink); outline-offset: -2px; }
html[data-ui="edison"] #topbar button:disabled { color: var(--hud-grey); cursor: default; background: transparent; }
html[data-ui="edison"] #topbar button svg { display: none; }
/* The order of the mockup: transport, the three toggles, then the tools. */
html[data-ui="edison"] #topbar .hud-run { order: 0; }
html[data-ui="edison"] #topbar #sim-run-btn, html[data-ui="edison"] #topbar #sim-stop-btn { order: 1; }
html[data-ui="edison"] #topbar #colouring-toggle { order: 2; }
html[data-ui="edison"] #topbar #flow-dots-toggle { order: 3; }
html[data-ui="edison"] #topbar #scope-toggle { order: 4; }
html[data-ui="edison"] #topbar #thevenin-btn { order: 5; }
html[data-ui="edison"] #topbar #csv-export-btn { order: 6; }
/* Run is the one solid cell; Stop is an outlined square. */
html[data-ui="edison"] #topbar #sim-run-btn { background: var(--hud-ink); color: var(--hud-k); }
html[data-ui="edison"] #topbar #sim-run-btn:hover { background: #DCDCDC; color: var(--hud-k); }
html[data-ui="edison"] #topbar #sim-run-btn::before {
  content: ''; width: 0; height: 0; border-left: 7px solid currentColor;
  border-top: 4px solid transparent; border-bottom: 4px solid transparent;
}
html[data-ui="edison"] #topbar #sim-stop-btn::before { content: ''; width: 8px; height: 8px; border: 1px solid currentColor; }
/* The square "+" buttons: the tools, the labs menu and Download. The "+" is
   hidden from screen readers, so each button keeps its name. */
html[data-ui="edison"] #topbar #thevenin-btn::after, html[data-ui="edison"] #topbar #csv-export-btn::after,
html[data-ui="edison"] #topbar #labs-menu-btn::after, html[data-ui="edison"] #topbar .topbar-actions > button::after {
  content: '+'; content: '+' / ''; margin-left: 2px;
}
/* The toggles: a 6 px status LED (span.hud-led, from edison/skin.js), blue when on. */
html[data-ui="edison"] #topbar button[aria-pressed="false"] { color: var(--hud-grey); }
html[data-ui="edison"] #topbar .hud-led { display: inline-block; flex: none; width: 6px; height: 6px; background: var(--hud-led-off); }
html[data-ui="edison"] #topbar button[aria-pressed="true"] > .hud-led { background: var(--hud-blue); }
/* Thévenin is a tool, not a toggle: white when idle, an inverted cell while
   it waits for its two holes (issue #196). */
html[data-ui="edison"] #topbar #thevenin-btn[aria-pressed="false"] { color: var(--hud-ink); }
html[data-ui="edison"] #topbar #thevenin-btn[aria-pressed="true"] { background: var(--hud-ink); color: var(--hud-k); }
/* RUNNING and the sim clock (edison/skin.js), shown while simulating. */
html[data-ui="edison"] #topbar .hud-run {
  display: flex; align-items: center; gap: 10px; flex: none; padding: 0 12px; border-right: 1px solid var(--hud-rule);
  font: 400 11px/1 var(--hud-mono); letter-spacing: 0.12em; text-transform: uppercase; white-space: nowrap; color: var(--hud-grey);
}
html[data-ui="edison"] #topbar .hud-run .hud-led { background: var(--hud-blue); }
html[data-ui="edison"] #topbar .hud-run .hud-led.bad { background: var(--hud-pink); }
html[data-ui="edison"] #topbar .hud-run b { font-weight: 400; color: var(--hud-ink); font-variant-numeric: tabular-nums; }
html[data-ui="edison"] #topbar .hud-run b:empty { display: none; }
/* The labs menu hangs off its cell, black like the strip. */
html[data-ui="edison"] #topbar .labs-menu-wrap { display: flex; height: 100%; }
html[data-ui="edison"] #topbar #labs-menu {
  top: 100%; padding: 0; background: var(--hud-k); color: var(--hud-ink);
  border: 1px solid var(--hud-line); border-radius: 0; box-shadow: none;
}
html[data-ui="edison"] #topbar #labs-menu .labs-menu-item {
  height: auto; padding: 10px 12px; border-right: 0; border-bottom: 1px solid var(--hud-rule);
  color: var(--hud-ink); font: 400 12px/1.4 var(--hud-mono); letter-spacing: 0; text-transform: none; white-space: normal;
}
html[data-ui="edison"] #topbar #labs-menu .labs-menu-item:last-child { border-bottom: 0; }
html[data-ui="edison"] #topbar #labs-menu .labs-menu-item:hover,
html[data-ui="edison"] #topbar #labs-menu .labs-menu-item:focus-visible { background: var(--hud-hover); outline: none; }
/* hidden still hides: the toggles stay out until a run starts. */
html[data-ui="edison"] #topbar [hidden] { display: none; }

/* ── Parts sidebar: black, caps headers with a count ── */
html[data-ui="edison"] #sidebar {
  width: 232px; padding: 0 0 12px; gap: 0; background: var(--hud-k); color: var(--hud-ink);
  border-right: 1px solid var(--hud-rule); scrollbar-color: #333333 var(--hud-k);
}
html[data-ui="edison"] #sidebar::-webkit-scrollbar-thumb { background: #333333; }
html[data-ui="edison"] #part-search {
  flex: none; height: 40px; margin: 0; padding: 0 16px; background: transparent; color: var(--hud-ink);
  border: 0; border-bottom: 1px solid var(--hud-rule); border-radius: 0;
  font: 400 11px var(--hud-mono); letter-spacing: 0.12em;
}
html[data-ui="edison"] #part-search::placeholder { color: var(--hud-grey); text-transform: uppercase; }
html[data-ui="edison"] #part-search:focus { background: var(--hud-hover); border-color: var(--hud-line); }
html[data-ui="edison"] #part-list, html[data-ui="edison"] .comp-group { gap: 0; }
/* The count is CSS: the group's ::after comes after its items, so the counter is
   complete; a search hides items (display: none), and they stop counting. */
html[data-ui="edison"] .comp-group {
  position: relative; padding-bottom: 6px; border-bottom: 1px solid var(--hud-rule); counter-reset: hud-parts;
}
html[data-ui="edison"] .comp-group .comp-item { counter-increment: hud-parts; }
html[data-ui="edison"] .comp-group::after {
  content: counter(hud-parts, decimal-leading-zero); position: absolute; top: 16px; right: 16px;
  font: 400 11px/1.4 var(--hud-mono); letter-spacing: 0.12em; color: var(--hud-grey);
}
html[data-ui="edison"] .comp-group-label, html[data-ui="edison"] .sidebar-section-label {
  padding: 16px 16px 8px; font: 400 11px/1.4 var(--hud-mono); letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--hud-ink);
}
html[data-ui="edison"] .sidebar-section-label { margin-top: 0 !important; }
html[data-ui="edison"] .comp-item { gap: 12px; padding: 6px 16px; border: 0; border-radius: 0; }
html[data-ui="edison"] .comp-item:not(.active):hover { background: var(--hud-hover); border-color: transparent; }
html[data-ui="edison"] .comp-item.active { background: var(--hud-hover); outline: 1px solid var(--hud-ink); outline-offset: -1px; }
html[data-ui="edison"] .comp-item-icon {
  width: 36px; height: 36px; background: transparent; border: 1px solid var(--hud-rule); border-radius: 0; color: var(--hud-ink);
}
html[data-ui="edison"] .comp-item:hover .comp-item-icon { border-color: var(--hud-line); }
html[data-ui="edison"] .comp-item.active .comp-item-icon { background: transparent; border-color: var(--hud-ink); color: var(--hud-ink); }
html[data-ui="edison"] .comp-item-name { font: 400 12px/1.5 var(--hud-mono); color: var(--hud-ink); }
html[data-ui="edison"] .comp-item-sub { font: 400 11px/1.5 var(--hud-mono); color: var(--hud-grey); }
html[data-ui="edison"] .comp-item.active .comp-item-name { color: var(--hud-ink); }
html[data-ui="edison"] .comp-item.active .comp-item-sub { color: var(--hud-grey); }
html[data-ui="edison"] .sidebar-divider { margin: 0; background: var(--hud-rule); }
html[data-ui="edison"] .color-swatches { padding: 0 16px 8px; }
html[data-ui="edison"] .swatch { border-radius: 0; }
html[data-ui="edison"] .swatch.active { border-color: var(--hud-ink); }
html[data-ui="edison"] .sidebar-help { padding: 12px 16px 0; border-top-color: var(--hud-rule); }
html[data-ui="edison"] .sidebar-help p { font: 400 11px/1.7 var(--hud-mono); color: var(--hud-grey); }
html[data-ui="edison"] .sidebar-help strong { font-weight: 400; color: var(--hud-ink); }
html[data-ui="edison"] #sidebar kbd {
  background: transparent; border: 1px solid var(--hud-line); border-radius: 0; color: var(--hud-ink); font: 400 10px var(--hud-mono);
}

/* ── Narrower laptops: tighter cells, the name keeps its room ── */
@media (max-width: 1366px) {
  html[data-ui="edison"] #topbar button, html[data-ui="edison"] #topbar .hud-run { padding: 0 8px; }
  html[data-ui="edison"] #topbar .topbar-brand { padding: 0 12px; }
  html[data-ui="edison"] #topbar .topbar-name-sep { display: none; }
}

/* ── Stacked layout (style.css → RESPONSIVE): the sidebar is one row ── */
@media (max-width: 1024px) and (min-height: 600px) {
  html[data-ui="edison"] #sidebar { width: 100%; padding: 0 8px; gap: 6px; border-right: 0; border-top: 1px solid var(--hud-rule); }
  html[data-ui="edison"] #part-search { width: 140px; height: 32px; padding: 0 8px; border: 1px solid var(--hud-rule); }
  html[data-ui="edison"] .comp-group { padding: 0; border-bottom: 0; }
  html[data-ui="edison"] .comp-group::after { display: none; }
  html[data-ui="edison"] .comp-item { padding: 4px 8px; }
}

/* ── Welcome card (D1): top centre, so the Run button and the chat input stay clear ── */
html[data-ui="edison"] #welcome-card:not([hidden]) {
  display: block; position: fixed; top: 56px; left: 50%; transform: translateX(-50%); z-index: 50;
  width: min(440px, calc(100vw - 32px)); padding: 16px 18px 18px; box-sizing: border-box;
  background: #101010; border: 1px solid #242424; color: #F4F4F4;
  font-family: 'DM Mono', ui-monospace, Menlo, Consolas, monospace;
}
html[data-ui="edison"] #welcome-card .welcome-title {
  margin: 0 0 8px; font-size: 11px; font-weight: 400; letter-spacing: 0.12em; text-transform: uppercase; color: #F4F4F4;
}
html[data-ui="edison"] #welcome-card .welcome-line { margin: 0 0 14px; font-size: 13px; line-height: 1.5; color: #D6D6D6; }
html[data-ui="edison"] #welcome-card .welcome-actions { display: flex; flex-direction: column; gap: 6px; }
html[data-ui="edison"] #welcome-card .welcome-actions button {
  font: inherit; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; text-align: left;
  padding: 9px 12px; background: transparent; color: #F4F4F4; border: 1px solid #676767; border-radius: 0; cursor: pointer;
}
html[data-ui="edison"] #welcome-card .welcome-actions button:hover,
html[data-ui="edison"] #welcome-card .welcome-actions button:focus-visible { border-color: #FF6A1A; color: #FF6A1A; outline: none; }
html[data-ui="edison"] #welcome-card .welcome-close {
  position: absolute; top: 6px; right: 8px; width: 28px; height: 28px; padding: 0; font: inherit; font-size: 18px;
  background: transparent; color: #8A8A8A; border: 0; cursor: pointer;
}
html[data-ui="edison"] #welcome-card .welcome-close:hover,
html[data-ui="edison"] #welcome-card .welcome-close:focus-visible { color: #FF6A1A; outline: none; }