/* COSIM — browser UI styles. Light/dark via prefers-color-scheme, overridable with [data-theme]. */

:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --surface-3: #eef0f4;
  --border: #d9dde4;
  --border-strong: #c2c8d2;
  --fg: #1d232c;
  --fg-muted: #5d6675;
  --fg-faint: #8a93a2;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --accent-soft: #e3ecff;
  --ok: #15803d;
  --ok-soft: #dcf5e4;
  --warn: #b45309;
  --warn-soft: #fdf0d8;
  --err: #c62828;
  --err-soft: #fde4e4;
  --cur-line: #fff3b0;
  --cur-line-border: #e2b100;
  --changed: #fff1c2;
  --bp: #d93025;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 6px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  /* syntax */
  --syn-comment: #6a7685;
  --syn-label: #8b3dbb;
  --syn-op: #1f5fbf;
  --syn-dir: #a1520c;
  --syn-reg: #0f7a5c;
  --syn-num: #b3261e;
  --syn-str: #7a5c00;
  /* pipeline stage colours */
  --st-F: #dbeafe; --st-D: #e0e7ff; --st-C: #dcfce7; --st-M: #fef3c7; --st-W: #fce7f3;
  --st-stall: #f1f1f1; --st-X: #fee2e2;
  /* board */
  --led-off: #4a1d1d;
  --led-on: #ff3b30;
  --seg-off: rgba(120, 20, 20, .16);
  --seg-on: #ff2d2d;
  --board: #1f3b2c;
  --board-fg: #e9f5ec;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12151a; --surface: #1a1e25; --surface-2: #1f242c; --surface-3: #262c35;
    --border: #2f3640; --border-strong: #3e4652; --fg: #e3e7ed; --fg-muted: #a0a9b6; --fg-faint: #6f7886;
    --accent: #5b8def; --accent-fg: #0b1220; --accent-soft: #1f2d4a;
    --ok: #4ade80; --ok-soft: #133222; --warn: #fbbf24; --warn-soft: #3a2b0c; --err: #f87171; --err-soft: #3b1717;
    --cur-line: #3d3714; --cur-line-border: #c9a227; --changed: #4a3e10; --bp: #f05545;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
    --syn-comment: #7d8796; --syn-label: #d2a8ff; --syn-op: #79b8ff; --syn-dir: #ffab70; --syn-reg: #56d4a8; --syn-num: #ff8f8f; --syn-str: #e3c06b;
    --st-F: #1e3a5f; --st-D: #2e3366; --st-C: #1d4a30; --st-M: #4d3d10; --st-W: #4f2440; --st-stall: #2a2f37; --st-X: #4a1f1f;
    --board: #14281e; --seg-off: rgba(255, 60, 60, .10);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12151a; --surface: #1a1e25; --surface-2: #1f242c; --surface-3: #262c35;
  --border: #2f3640; --border-strong: #3e4652; --fg: #e3e7ed; --fg-muted: #a0a9b6; --fg-faint: #6f7886;
  --accent: #5b8def; --accent-fg: #0b1220; --accent-soft: #1f2d4a;
  --ok: #4ade80; --ok-soft: #133222; --warn: #fbbf24; --warn-soft: #3a2b0c; --err: #f87171; --err-soft: #3b1717;
  --cur-line: #3d3714; --cur-line-border: #c9a227; --changed: #4a3e10; --bp: #f05545;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  --syn-comment: #7d8796; --syn-label: #d2a8ff; --syn-op: #79b8ff; --syn-dir: #ffab70; --syn-reg: #56d4a8; --syn-num: #ff8f8f; --syn-str: #e3c06b;
  --st-F: #1e3a5f; --st-D: #2e3366; --st-C: #1d4a30; --st-M: #4d3d10; --st-W: #4f2440; --st-stall: #2a2f37; --st-X: #4a1f1f;
  --board: #14281e; --seg-off: rgba(255, 60, 60, .10);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--fg); font: 14px/1.45 var(--sans); }
button, input, select, textarea { font: inherit; color: inherit; }
code, kbd, .mono { font-family: var(--mono); font-size: .92em; }
a { color: var(--accent); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }

#app { display: flex; flex-direction: column; height: 100vh; min-height: 0; }

/* ---------------------------------------------------------------- top bar & toolbar */
.topbar {
  display: flex; align-items: center; gap: 16px; padding: 8px 16px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.logo { color: var(--accent); display: inline-flex; }
.brand-name { font-weight: 700; letter-spacing: .04em; }
.brand-sub { color: var(--fg-muted); font-size: 13px; }
.program-picker { flex: 1; min-width: 0; display: flex; justify-content: center; }
.program-picker select { width: min(520px, 100%); }
.topbar-right { display: flex; gap: 6px; }

select, input[type="text"], input[type="number"], input:not([type]) {
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius);
  padding: 4px 8px; min-height: 30px;
}
select:focus-visible, input:focus-visible, button:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}

.toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; padding: 7px 16px;
  background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.tb-group { display: flex; align-items: center; gap: 6px; }
.tb-group.speed label { color: var(--fg-muted); font-size: 13px; }

.btn {
  display: inline-flex; align-items: center; gap: 5px; min-height: 30px; padding: 4px 12px;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius);
  cursor: pointer; white-space: nowrap; box-shadow: var(--shadow);
}
.btn:hover:not(:disabled) { background: var(--surface-3); }
.btn:disabled { opacity: .45; cursor: default; box-shadow: none; }
.btn.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600; }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--accent); }
.btn.run { color: var(--ok); font-weight: 600; }
.btn.accent { border-color: var(--ok); color: var(--ok); font-weight: 600; }
.btn.small { min-height: 24px; padding: 1px 8px; font-size: 12.5px; box-shadow: none; }
.btn.link { border: none; background: none; box-shadow: none; color: var(--accent); padding: 0 4px; min-height: 0; }
.icon-btn {
  width: 30px; height: 30px; display: inline-flex; align-items: center; justify-content: center;
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer; font-weight: 700;
}
.icon-btn:hover { background: var(--surface-3); }

/* ---------------------------------------------------------------- workspace */
.workspace { flex: 1; min-height: 0; display: flex; padding: 10px; gap: 0; }
.pane { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; min-width: 0; min-height: 0; display: flex; flex-direction: column; box-shadow: var(--shadow); }
.editor-pane { flex: 0 0 var(--editor-width, 46%); }
.side-pane { flex: 1 1 0; }
.splitter { flex: 0 0 10px; cursor: col-resize; position: relative; }
.splitter::after { content: ""; position: absolute; left: 4px; top: 40%; height: 20%; width: 2px; border-radius: 1px; background: var(--border-strong); }
.splitter:hover::after, .splitter.dragging::after { background: var(--accent); }

.pane-head { display: flex; align-items: center; gap: 10px; padding: 6px 12px; border-bottom: 1px solid var(--border); min-height: 36px; }
.pane-title { font-weight: 600; font-family: var(--mono); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.editor-note { margin-left: auto; color: var(--fg-muted); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------------------------------------------------------------- editor */
.editor { flex: 1; min-height: 0; position: relative; }
.ed-scroll { position: absolute; inset: 0; overflow: auto; display: flex; align-items: flex-start; background: var(--surface); }
.ed-gutter {
  position: sticky; left: 0; z-index: 3; flex: 0 0 auto; min-height: 100%;
  background: var(--surface-2); border-right: 1px solid var(--border); user-select: none;
  font: 13px/20px var(--mono); color: var(--fg-faint); padding: 8px 0;
}
.ed-ln { height: 20px; padding: 0 8px 0 20px; text-align: right; cursor: pointer; position: relative; min-width: 48px; }
.ed-ln:hover { color: var(--fg); }
.ed-ln:hover::before { content: ""; position: absolute; left: 6px; top: 5px; width: 10px; height: 10px; border-radius: 50%; background: var(--bp); opacity: .3; }
.ed-ln.bp::before { content: ""; position: absolute; left: 6px; top: 5px; width: 10px; height: 10px; border-radius: 50%; background: var(--bp); opacity: 1; }
.ed-ln.cur { color: var(--fg); font-weight: 700; background: var(--cur-line); }
.ed-ln.err { color: var(--err); font-weight: 700; }
.ed-ln.warn { color: var(--warn); }
.ed-ln.err::after, .ed-ln.warn::after { content: "!"; position: absolute; left: 2px; top: 0; font-weight: 800; }
.ed-ln.err.bp::after, .ed-ln.warn.bp::after { content: none; }
.ed-main { position: relative; flex: 1 0 auto; min-height: 100%; }
.ed-lines, .ed-hl, .ed-text {
  font: 13px/20px var(--mono); tab-size: 8; white-space: pre; padding: 8px 12px; margin: 0; letter-spacing: 0;
}
.ed-lines { position: absolute; inset: 0; pointer-events: none; padding-left: 0; padding-right: 0; }
.ed-lines > div { height: 20px; }
.ed-lines .cur { background: var(--cur-line); box-shadow: inset 3px 0 0 var(--cur-line-border); }
.ed-lines .err { background: var(--err-soft); }
.ed-lines .warn { background: var(--warn-soft); }
.ed-lines .cur.err { background: var(--err-soft); box-shadow: inset 3px 0 0 var(--err); }
.ed-hl { position: absolute; inset: 0; pointer-events: none; color: var(--fg); }
.ed-text {
  position: relative; display: block; border: 0; outline: none; resize: none; overflow: hidden;
  background: transparent; color: transparent; caret-color: var(--fg); min-width: 100%;
  -webkit-text-fill-color: transparent;
}
.ed-text::selection { background: rgba(37, 99, 235, .28); -webkit-text-fill-color: transparent; }
.ed-text.plain { color: var(--fg); -webkit-text-fill-color: currentColor; }
.ed-text.plain::selection { -webkit-text-fill-color: currentColor; }
.tok-c { color: var(--syn-comment); font-style: italic; }
.tok-l { color: var(--syn-label); font-weight: 600; }
.tok-o { color: var(--syn-op); font-weight: 600; }
.tok-d { color: var(--syn-dir); font-weight: 600; }
.tok-r { color: var(--syn-reg); }
.tok-n { color: var(--syn-num); }
.tok-s { color: var(--syn-str); }
.ed-tip {
  position: fixed; z-index: 50; max-width: 460px; padding: 8px 10px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border-strong); box-shadow: 0 6px 20px rgba(0,0,0,.18);
  font-size: 13px; pointer-events: none;
}
.ed-tip .hint { color: var(--fg-muted); margin-top: 4px; }

/* ---------------------------------------------------------------- messages under the editor */
.messages { max-height: 28%; overflow: auto; border-top: 1px solid var(--border); font-size: 13px; }
.messages:empty { display: none; }
.msg { display: flex; gap: 8px; padding: 5px 12px; border-bottom: 1px solid var(--border); cursor: default; }
.msg:last-child { border-bottom: 0; }
.msg[data-line] { cursor: pointer; }
.msg[data-line]:hover { background: var(--surface-3); }
.msg .tag { flex: 0 0 auto; font-weight: 700; font-size: 11px; text-transform: uppercase; letter-spacing: .04em; padding: 1px 6px; border-radius: 4px; align-self: flex-start; margin-top: 1px; }
.msg.error .tag { background: var(--err-soft); color: var(--err); }
.msg.warning .tag { background: var(--warn-soft); color: var(--warn); }
.msg.info .tag { background: var(--accent-soft); color: var(--accent); }
.msg.ok .tag { background: var(--ok-soft); color: var(--ok); }
.msg .where { color: var(--fg-muted); font-family: var(--mono); font-size: 12px; flex: 0 0 auto; margin-top: 1px; }
.msg .hint { color: var(--fg-muted); }

/* ---------------------------------------------------------------- tabs */
.tabs { display: flex; gap: 2px; padding: 6px 8px 0; border-bottom: 1px solid var(--border); overflow-x: auto; scrollbar-width: thin; flex: 0 0 auto; }
.tabs button {
  border: 1px solid transparent; border-bottom: none; background: none; padding: 6px 10px; cursor: pointer;
  color: var(--fg-muted); border-radius: 6px 6px 0 0; white-space: nowrap; margin-bottom: -1px; font-size: 13.5px;
}
.tabs button:hover { color: var(--fg); background: var(--surface-3); }
.tabs button[aria-selected="true"] { color: var(--fg); background: var(--surface); border-color: var(--border); font-weight: 600; box-shadow: inset 0 2px 0 var(--accent); }
.tab-body { flex: 1; min-height: 0; position: relative; }
.tab-panel { position: absolute; inset: 0; overflow: auto; padding: 14px 16px; display: none; }
.tab-panel.active { display: block; }

h2.ph, h3.ph { font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--fg-muted); margin: 18px 0 8px; font-weight: 700; }
h2.ph:first-child, h3.ph:first-child { margin-top: 0; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.muted { color: var(--fg-muted); }
.faint { color: var(--fg-faint); }
.small { font-size: 12.5px; }
.card { border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2); padding: 10px 12px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.seg-toggle { display: inline-flex; border: 1px solid var(--border-strong); border-radius: var(--radius); overflow: hidden; }
.seg-toggle button { border: 0; background: var(--surface); padding: 3px 10px; cursor: pointer; font-size: 12.5px; }
.seg-toggle button + button { border-left: 1px solid var(--border-strong); }
.seg-toggle button.on { background: var(--accent); color: var(--accent-fg); }
.empty { color: var(--fg-muted); padding: 24px 4px; text-align: center; }

/* tables */
table.data { border-collapse: collapse; width: 100%; font-size: 13px; }
table.data th { text-align: left; font-weight: 600; color: var(--fg-muted); font-size: 12px; padding: 4px 8px; border-bottom: 1px solid var(--border-strong); position: sticky; top: 0; background: var(--surface); z-index: 1; }
table.data td { padding: 3px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.data td.mono, table.data th.mono { font-family: var(--mono); font-size: 12.5px; }
table.data tr.cur td { background: var(--cur-line); }
table.data tr.clickable { cursor: pointer; }
table.data tr.clickable:hover td { background: var(--surface-3); }
table.data tr.cur.clickable:hover td { background: var(--cur-line); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* stat tiles */
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 8px; }
.stat { border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; background: var(--surface-2); }
.stat .k { font-size: 11.5px; color: var(--fg-muted); text-transform: uppercase; letter-spacing: .04em; }
.stat .v { font-size: 18px; font-weight: 650; font-variant-numeric: tabular-nums; font-family: var(--mono); }

/* forms in panels */
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 8px 14px; align-items: end; }
.form-grid label { display: flex; flex-direction: column; gap: 3px; font-size: 12.5px; color: var(--fg-muted); }
.form-grid label.check { flex-direction: row; align-items: center; gap: 6px; color: var(--fg); font-size: 13.5px; min-height: 30px; }
.form-grid select, .form-grid input { width: 100%; }
.form-grid label.check input { width: auto; }

/* ---------------------------------------------------------------- registers */
.reg-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(196px, 1fr)); gap: 4px 10px; }
.reg {
  display: flex; align-items: center; gap: 8px; padding: 3px 8px; border-radius: 5px;
  font-family: var(--mono); font-size: 13px; border: 1px solid transparent; cursor: text; min-height: 28px;
}
.reg:hover { border-color: var(--border); background: var(--surface-2); }
.reg .rn { width: 64px; color: var(--fg-muted); flex: 0 0 auto; }
.reg .rn small { color: var(--fg-faint); }
.reg .rv { flex: 1; text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.reg.zero .rv { color: var(--fg-faint); }
.reg.changed { background: var(--changed); border-color: var(--cur-line-border); }
.reg input { width: 100%; font-family: var(--mono); font-size: 13px; padding: 1px 4px; min-height: 22px; text-align: right; }
.reg.special .rn { color: var(--accent); font-weight: 600; }

/* ---------------------------------------------------------------- memory */
.mem-table { font-family: var(--mono); font-size: 12.5px; border-collapse: collapse; }
.mem-table th { color: var(--fg-muted); font-weight: 600; padding: 2px 6px; text-align: right; position: sticky; top: 0; background: var(--surface); }
.mem-table td { padding: 1px 6px; text-align: right; white-space: nowrap; }
.mem-table td.addr { color: var(--fg-muted); padding-right: 12px; }
.mem-table td.w { cursor: text; border-radius: 3px; }
.mem-table td.w:hover { background: var(--surface-3); }
.mem-table td.w.zero { color: var(--fg-faint); }
.mem-table td.w.pc { background: var(--cur-line); box-shadow: inset 0 0 0 1px var(--cur-line-border); }
.mem-table td.w.sp { box-shadow: inset 0 0 0 1px var(--accent); }
.mem-table td.w.rd { background: var(--accent-soft); }
.mem-table td.w.wr { background: var(--changed); }
.mem-table td.ascii { text-align: left; color: var(--fg-muted); padding-left: 12px; letter-spacing: .05em; }
.mem-table td.lbl { text-align: left; color: var(--syn-label); font-size: 11.5px; padding-left: 10px; }
.mem-table input { width: 9.5ch; font-family: var(--mono); font-size: 12.5px; padding: 0 2px; min-height: 18px; }
.legend { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--fg-muted); }
.legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* ---------------------------------------------------------------- I/O board */
.terminal {
  background: #0d1117; color: #d7f5d0; font: 13px/1.4 var(--mono); border-radius: 8px; padding: 10px 12px;
  height: 180px; overflow: auto; white-space: pre-wrap; word-break: break-all; border: 1px solid #000; position: relative;
}
.terminal:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.terminal .cursor { display: inline-block; width: .6em; background: #d7f5d0; animation: blink 1s steps(1) infinite; }
.terminal:not(:focus) .cursor { opacity: .35; animation: none; }
@keyframes blink { 50% { opacity: 0; } }
.term-input { display: flex; gap: 6px; margin-top: 8px; }
.term-input input { flex: 1; font-family: var(--mono); }
.board { background: var(--board); color: var(--board-fg); border-radius: 10px; padding: 14px 16px; display: flex; flex-direction: column; gap: 14px; }
.board h4 { margin: 0 0 6px; font-size: 11.5px; text-transform: uppercase; letter-spacing: .08em; opacity: .75; font-weight: 600; }
.board .addr { opacity: .6; font-family: var(--mono); font-size: 11px; text-transform: none; letter-spacing: 0; margin-left: 6px; }
.hexes { display: flex; gap: 6px; flex-wrap: wrap; }
.hex { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.hex svg { width: 46px; height: 72px; background: #120808; border-radius: 5px; padding: 4px; }
.hex .seg { fill: var(--seg-off); }
.hex .seg.on { fill: var(--seg-on); filter: drop-shadow(0 0 3px rgba(255, 50, 50, .7)); }
.hex .cap { font-size: 10.5px; font-family: var(--mono); opacity: .7; }
.leds, .switches, .buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.led { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.led i { width: 16px; height: 16px; border-radius: 50%; background: var(--led-off); box-shadow: inset 0 -2px 3px rgba(0,0,0,.4); }
.led.on i { background: var(--led-on); box-shadow: 0 0 8px 2px rgba(255, 59, 48, .7); }
.led span, .sw span, .pb span { font-size: 10.5px; font-family: var(--mono); opacity: .75; }
.sw { display: flex; flex-direction: column; align-items: center; gap: 3px; background: none; border: 0; padding: 0; cursor: pointer; color: inherit; }
.sw .track { width: 18px; height: 34px; border-radius: 4px; background: #0c1a12; border: 1px solid #000; position: relative; }
.sw .knob { position: absolute; left: 1px; right: 1px; height: 15px; bottom: 1px; border-radius: 3px; background: #b9c2bd; transition: bottom .08s; }
.sw.on .knob { bottom: 17px; background: #f2f6f3; }
.pb { display: flex; flex-direction: column; align-items: center; gap: 3px; background: none; border: 0; padding: 0; cursor: pointer; color: inherit; touch-action: none; }
.pb .cap-btn { width: 34px; height: 34px; border-radius: 50%; background: radial-gradient(circle at 40% 35%, #5c6670, #22282e); border: 2px solid #0a0d10; box-shadow: 0 3px 0 #000; }
.pb.down .cap-btn { transform: translateY(2px); box-shadow: 0 1px 0 #000; background: radial-gradient(circle at 40% 35%, #3a7bd5, #1d3f72); }
.pb .edge { width: 6px; height: 6px; border-radius: 50%; background: transparent; }
.pb .edge.set { background: #fbbf24; }
.board-row { display: flex; flex-wrap: wrap; gap: 18px 28px; }
.devregs { font-family: var(--mono); font-size: 12.5px; }
.flag { display: inline-block; min-width: 22px; text-align: center; padding: 0 5px; border-radius: 4px; background: var(--surface-3); color: var(--fg-muted); margin-right: 4px; font-size: 12px; }
.flag.on { background: var(--ok-soft); color: var(--ok); font-weight: 700; }

/* ---------------------------------------------------------------- datapath */
.dp-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.dp-instr { font-family: var(--mono); font-size: 16px; font-weight: 650; }
.dp-steps td.rtn { font-family: var(--mono); font-size: 12.5px; min-width: 260px; }
.dp-steps td.step { white-space: nowrap; font-weight: 600; }
.dp-steps td.v { font-family: var(--mono); font-size: 12px; text-align: right; white-space: nowrap; }
.dp-steps td.v.chg { background: var(--changed); font-weight: 700; }
.dp-steps .snum { display: inline-flex; width: 20px; height: 20px; border-radius: 50%; align-items: center; justify-content: center; background: var(--accent-soft); color: var(--accent); font-size: 12px; margin-right: 6px; }
.signals { display: flex; flex-wrap: wrap; gap: 6px; }
.signal { font-family: var(--mono); font-size: 12px; padding: 2px 8px; border-radius: 4px; background: var(--surface-3); }
.fig { max-width: 100%; border: 1px solid var(--border); border-radius: 8px; background: #fff; margin-top: 8px; }
details > summary { cursor: pointer; color: var(--fg-muted); font-weight: 600; margin: 14px 0 6px; }

/* ---------------------------------------------------------------- pipeline diagram */
.pipe-wrap { overflow: auto; max-height: 520px; border: 1px solid var(--border); border-radius: 8px; }
table.pipe { border-collapse: separate; border-spacing: 0; font-family: var(--mono); font-size: 12px; }
table.pipe th, table.pipe td { padding: 0; height: 22px; min-width: 24px; text-align: center; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
table.pipe th { position: sticky; top: 0; background: var(--surface-2); color: var(--fg-muted); font-weight: 600; z-index: 2; font-size: 11px; }
table.pipe td.ins, table.pipe th.ins { position: sticky; left: 0; background: var(--surface); text-align: left; padding: 0 10px 0 8px; white-space: nowrap; z-index: 1; min-width: 210px; max-width: 280px; overflow: hidden; text-overflow: ellipsis; }
table.pipe th.ins { z-index: 3; background: var(--surface-2); }
table.pipe td.ins .n { color: var(--fg-faint); display: inline-block; width: 26px; }
table.pipe td.s-F { background: var(--st-F); font-weight: 700; }
table.pipe td.s-D { background: var(--st-D); font-weight: 700; }
table.pipe td.s-C { background: var(--st-C); font-weight: 700; }
table.pipe td.s-M { background: var(--st-M); font-weight: 700; }
table.pipe td.s-W { background: var(--st-W); font-weight: 700; }
table.pipe td.s-stall { background: repeating-linear-gradient(135deg, var(--st-stall), var(--st-stall) 3px, transparent 3px, transparent 6px); color: var(--fg-muted); }
table.pipe td.s-X { background: var(--st-X); color: var(--err); font-weight: 700; }
table.pipe tr.discarded td.ins { color: var(--fg-faint); text-decoration: line-through; }
table.pipe td.note { text-align: left; padding: 0 8px; color: var(--warn); white-space: nowrap; font-family: var(--sans); font-size: 11.5px; border-right: 0; }

/* ---------------------------------------------------------------- cache */
.addr-split { display: inline-flex; font-family: var(--mono); font-size: 12.5px; border: 1px solid var(--border-strong); border-radius: 6px; overflow: hidden; }
.addr-split span { padding: 3px 10px; }
.addr-split .t { background: var(--st-D); }
.addr-split .i { background: var(--st-C); }
.addr-split .o { background: var(--st-M); }
table.cache tr.last td { background: var(--changed); }
table.cache tr.inv td { color: var(--fg-faint); }
.hm { display: inline-block; padding: 0 6px; border-radius: 4px; font-size: 11.5px; font-weight: 700; }
.hm.hit { background: var(--ok-soft); color: var(--ok); }
.hm.miss { background: var(--err-soft); color: var(--err); }

/* ---------------------------------------------------------------- task */
.task-desc { font-size: 14px; line-height: 1.55; }
.task-desc code { background: var(--surface-3); padding: 0 4px; border-radius: 3px; }
.task-desc pre { background: var(--surface-3); padding: 8px 10px; border-radius: 6px; overflow: auto; }
.task-title { font-size: 18px; font-weight: 700; margin: 0 0 2px; }
.test-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.test-item { border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; background: var(--surface-2); }
.test-item .tname { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.test-item .badge { font-size: 11px; font-weight: 800; padding: 1px 7px; border-radius: 10px; text-transform: uppercase; letter-spacing: .04em; }
.test-item.pass { border-color: color-mix(in srgb, var(--ok) 40%, var(--border)); }
.test-item.fail { border-color: color-mix(in srgb, var(--err) 45%, var(--border)); }
.test-item.pass .badge { background: var(--ok-soft); color: var(--ok); }
.test-item.fail .badge { background: var(--err-soft); color: var(--err); }
.test-item.todo .badge { background: var(--surface-3); color: var(--fg-muted); }
.test-item ul { margin: 4px 0 0; padding-left: 18px; font-size: 13px; color: var(--fg-muted); }
.test-item ul li { white-space: pre-wrap; }
.summary { padding: 8px 12px; border-radius: 8px; font-weight: 700; margin: 10px 0; }
.summary.pass { background: var(--ok-soft); color: var(--ok); }
.summary.fail { background: var(--err-soft); color: var(--err); }
.hint-box { border-left: 3px solid var(--warn); background: var(--warn-soft); padding: 6px 10px; border-radius: 0 6px 6px 0; margin: 6px 0; font-size: 13.5px; }

/* ---------------------------------------------------------------- status bar */
.statusbar {
  display: flex; align-items: center; gap: 18px; padding: 5px 16px; background: var(--surface);
  border-top: 1px solid var(--border); font-size: 12.5px; white-space: nowrap; overflow: hidden; min-height: 30px;
}
.st-item { color: var(--fg-muted); }
.st-item b { color: var(--fg); font-family: var(--mono); font-weight: 600; margin-left: 3px; }
.st-state { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; font-size: 11.5px; padding: 2px 8px; border-radius: 10px; background: var(--surface-3); }
.st-state .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--fg-faint); }
.st-state.ready .dot { background: var(--accent); }
.st-state.running { background: var(--ok-soft); color: var(--ok); }
.st-state.running .dot { background: var(--ok); animation: blink 0.8s steps(1) infinite; }
.st-state.breakpoint, .st-state.paused { background: var(--warn-soft); color: var(--warn); }
.st-state.breakpoint .dot, .st-state.paused .dot { background: var(--warn); }
.st-state.waiting { background: var(--accent-soft); color: var(--accent); }
.st-state.waiting .dot { background: var(--accent); }
.st-state.halted { background: var(--surface-3); color: var(--fg); }
.st-state.halted .dot { background: var(--fg); }
.st-state.error { background: var(--err-soft); color: var(--err); }
.st-state.error .dot { background: var(--err); }
.st-msg { color: var(--fg-muted); overflow: hidden; text-overflow: ellipsis; flex: 1; min-width: 0; }

/* ---------------------------------------------------------------- dialog */
.dialog { border: 1px solid var(--border-strong); border-radius: 10px; padding: 0; width: min(640px, calc(100vw - 32px)); background: var(--surface); color: var(--fg); box-shadow: 0 20px 50px rgba(0,0,0,.3); }
.dialog::backdrop { background: rgba(10, 14, 20, .45); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.dialog-head h2 { margin: 0; font-size: 17px; }
.dialog-body { padding: 4px 18px 16px; max-height: 70vh; overflow: auto; }
.dialog-body h3 { font-size: 14px; margin: 16px 0 6px; }
.kbd-table td { padding: 3px 12px 3px 0; }
kbd { border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; padding: 0 5px; background: var(--surface-2); font-size: 12px; }

/* ---------------------------------------------------------------- narrow screens */
@media (max-width: 1100px) {
  .brand-sub { display: none; }
}
@media (max-width: 860px) {
  #app { height: auto; min-height: 100vh; }
  .workspace { flex-direction: column; gap: 10px; }
  .editor-pane { flex: none; height: 60vh; }
  .side-pane { flex: none; height: 75vh; }
  .splitter { display: none; }
  .topbar { flex-wrap: wrap; gap: 8px; padding: 8px 10px; }
  .program-picker { order: 3; flex-basis: 100%; }
  .topbar-right { margin-left: auto; }
  .program-picker select { width: 100%; }
  .toolbar { padding: 6px 10px; }
  .statusbar { flex-wrap: wrap; white-space: normal; gap: 4px 12px; }
  .st-msg { flex-basis: 100%; }
}

/* ---------------------------------------------------------------- targets (generic panels) */
.target-picker select { max-width: 230px; font-weight: 600; }
.flag-row { display: flex; gap: 6px; flex-wrap: wrap; }
.flagbtn { min-width: 34px; padding: 3px 8px; border-radius: 5px; border: 1px solid var(--border-strong); background: var(--surface-3); color: var(--fg-muted); font-family: var(--mono); font-weight: 700; cursor: pointer; }
.flagbtn.on { background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }
.flagbtn.changed { box-shadow: 0 0 0 2px var(--cur-line-border); }
.wrow { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: flex-end; }
.led.c-green.on i { background: #22c55e; box-shadow: 0 0 8px 2px rgba(34, 197, 94, .7); }
.led.c-amber.on i, .led.c-yellow.on i { background: #fbbf24; box-shadow: 0 0 8px 2px rgba(251, 191, 36, .7); }
.led.c-blue.on i { background: #3b82f6; box-shadow: 0 0 8px 2px rgba(59, 130, 246, .7); }
.led.c-green i { background: #183d24; } .led.c-amber i, .led.c-yellow i { background: #4a3a12; } .led.c-blue i { background: #18264a; }
.slider { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.slider .slabel { font-family: var(--mono); opacity: .8; }
.slider input[type="range"] { width: 180px; accent-color: #9ad1b0; }
.pins-wrap h4 { margin-bottom: 4px; }
table.pins { border-collapse: collapse; font-family: var(--mono); font-size: 12px; }
table.pins th { font-weight: 600; opacity: .7; padding: 1px 5px; }
table.pins td { padding: 1px 5px; text-align: center; }
table.pins td.pin { width: 24px; border-radius: 3px; border: 1px solid rgba(0,0,0,.35); }
td.pin.out-hi { background: #ef4444; color: #fff; font-weight: 700; }
td.pin.out-lo { background: #4a1d1d; color: #e9f5ec; }
td.pin.in-hi { background: #2f6f4a; color: #fff; }
td.pin.in-lo { background: #0c1a12; color: #9ab; }
td.pin.floating { background: repeating-linear-gradient(135deg, #3a3f45, #3a3f45 3px, #23272b 3px, #23272b 6px); color: #fbbf24; }
td.pin sup { font-size: 9px; margin-left: 1px; }
.textw { font-size: 13px; }
.tree { padding-left: 14px; border-left: 1px dotted var(--border-strong); }
.tree .k { color: var(--fg-muted); }
.ref-table td { font-size: 12.5px; }
.board.generic { flex-direction: row; flex-wrap: wrap; align-items: flex-end; gap: 18px 30px; }
.board.generic .wrow-pins, .board.generic .wrow-text { flex-basis: 100%; }