/* Sensepeek Probe POC — brand theme: dark, technical, yellow-on-black.
   Sharp corners everywhere (no border-radius). */

:root {
  --bg: #0a0a0a;
  --card: #111113;
  --border: #232326;
  --border-strong: #3a3a3e;
  --tile: #1a1a1c;
  --grid: #1d1d20;
  --text: #a7a7ad;
  --text-dim: #6e6e76;
  --heading: #ffffff;
  --accent: #f2e600;
  --accent-hover: #ffee33;
  --trig: #ff9d3a;
  --red: #e2554f;
  /* Trace stroke colour per scope source (Pantone-Coated sRGB). Trace only. */
  --trace-diff:   #005EB8; /* Pantone 300 C — DIFF   (source 0) */
  --trace-active: #E4002B; /* Pantone 185 C — ACTIVE (source 1) */
  --trace-diffp:  #009639; /* Pantone 355 C — DIFF+  (source 2) */
  --trace-diffn:  #FFC72C; /* Pantone 123 C — DIFF−  (source 3) */
  --mono: ui-monospace, "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;
  --sans: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 1.5rem clamp(1rem, 4vw, 2.5rem) 3rem;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
}

/* ------------------------------- Header -------------------------------- */

header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-bottom: 1.25rem;
}

h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  font-weight: 750;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--heading);
  line-height: 1.1;
}

.tagline {
  margin: 0.35rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
}

.sq { color: var(--accent); font-style: normal; }

.header-right { display: flex; align-items: center; gap: 0.75rem; }

/* ------------------------------ Status pill ----------------------------- */

.pill {
  padding: 0.4rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid transparent;
}
.pill-disconnected { background: var(--tile); color: var(--text-dim); border-color: var(--border-strong); }
.pill-connected    { background: var(--accent); color: #000; border-color: var(--accent); }
.pill-demo         { background: transparent; color: var(--accent); border-color: var(--accent); }
.pill-error        { background: transparent; color: var(--red); border-color: var(--red); }

/* -------------------------------- Buttons ------------------------------- */

button {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 0;
  cursor: pointer;
}
button:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #000;
  border: 1px solid var(--accent);
  padding: 0.55rem 1.4rem;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn-secondary {
  background: transparent;
  color: var(--heading);
  border: 1px solid var(--border-strong);
  padding: 0.45rem 1rem;
}
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); }

button:focus-visible,
input:focus-visible { outline: 1px solid var(--accent); outline-offset: 2px; }

/* ----------------------------- Banner / hint ---------------------------- */

.banner {
  background: rgba(226, 85, 79, 0.08);
  border: 1px solid var(--red);
  color: #f3b6b3;
  padding: 0.7rem 1rem;
  margin-bottom: 1rem;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.demo-hint { color: var(--text); font-size: 0.85rem; margin: 0 0 1rem; }
.demo-hint a { color: var(--accent); }

.hidden { display: none !important; }

/* -------------------------------- Cards --------------------------------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 1rem 1.15rem 1.1rem;
}

/* Corner-bracket framing (viewfinder corners: top-left + bottom-right) */
.card::before,
.card::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}
.card::before {
  top: -1px;
  left: -1px;
  border-top: 1px solid var(--border-strong);
  border-left: 1px solid var(--border-strong);
}
.card::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 1px solid var(--border-strong);
  border-right: 1px solid var(--border-strong);
}
.card:hover::before,
.card:hover::after { border-color: var(--accent); }

.card-wide { grid-column: 1 / -1; }

/* Card header: icon tile + eyebrow label */
.card-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}

.icon-tile {
  width: 28px;
  height: 28px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--tile);
  border: 1px solid var(--border);
  color: var(--accent);
}

.eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text);
}

.card-sub {
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.card-actions { margin-top: 0.85rem; }

/* Key/value lists */
.kv {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 1rem;
  margin: 0;
}
.kv dt { color: var(--text); }
.kv dd { margin: 0; text-align: right; color: var(--heading); }

.mono { font-family: var(--mono); }
.strong { color: var(--accent); font-weight: 600; }
.muted { color: var(--text-dim); }

/* Rows inside cards */
.row { display: flex; align-items: center; gap: 0.75rem; margin: 0.45rem 0; }
.row-label {
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sub-value { margin-top: 0.55rem; font-family: var(--mono); font-size: 0.85rem; color: var(--text); }

.big-number {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding: 0.4rem 0;
  color: var(--accent);
}
.big-number.muted { color: var(--text-dim); }

input[type="number"] {
  background: #0a0a0a;
  border: 1px solid var(--border-strong);
  color: var(--heading);
  font: inherit;
  font-family: var(--mono);
  border-radius: 0;
  padding: 0.4rem 0.6rem;
  width: 9.5rem;
}
input[type="number"]:focus { outline: 1px solid var(--accent); border-color: var(--accent); }
input[type="number"]:disabled { opacity: 0.4; }

/* Log-frequency slider — sharp track, square yellow thumb */
.freq-slider-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0.7rem 0 0.2rem;
}

.slider-end {
  flex: none;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  min-width: 0;
  height: 2px;
  margin: 0;
  padding: 0;
  background: var(--border);
  border: none;
  border-radius: 0;
  cursor: pointer;
}
input[type="range"]:disabled { opacity: 0.4; cursor: not-allowed; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: none;
  border-radius: 0;
}
input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--border);
  border: none;
  border-radius: 0;
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: none;
  border-radius: 0;
}

/* Duty-cycle slider row — same sharp slider, label + live readout */
.duty-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0.8rem 0 0.2rem;
}
.duty-row .row-label { flex: none; }
.duty-readout {
  flex: none;
  min-width: 3.1rem;
  text-align: right;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

/* Toggle switch — square, yellow when on */
.switch { position: relative; display: inline-block; width: 44px; height: 24px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  inset: 0;
  background: var(--tile);
  border: 1px solid var(--border-strong);
  transition: background 0.15s, border-color 0.15s;
  cursor: pointer;
}
.slider::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 4px;
  top: 4px;
  background: var(--text-dim);
  transition: transform 0.15s, background 0.15s;
}
.switch input:checked + .slider { background: var(--accent); border-color: var(--accent); }
.switch input:checked + .slider::before { transform: translateX(20px); background: #000; }
.switch input:disabled + .slider { opacity: 0.4; cursor: not-allowed; }

/* Button press counter — big mono yellow total + client-side ZERO reset */
.press-block { margin-top: 0.7rem; }
.press-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.press-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.press-count {
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}
.btn-small { padding: 0.3rem 0.75rem; font-size: 0.68rem; }

/* Button indicator — sharp square, yellow when pressed */
.dot {
  width: 16px;
  height: 16px;
  background: var(--tile);
  border: 1px solid var(--border-strong);
  flex: none;
  transition: background 0.1s, box-shadow 0.1s;
}
.dot.on {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(242, 230, 0, 0.55);
}

/* ----------------------------- Oscilloscope ----------------------------- */

.scope-toolbar {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 0.55rem 0.7rem;
  margin-left: auto;
}

/* Function group: a tiny mono caption above its controls */
.tb-group {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}
.tb-cap {
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  line-height: 1;
}
/* SOURCE writes hardware — flag it with an accent tick on the caption */
.tb-input .tb-cap { color: var(--text); }
.tb-input .tb-cap::before {
  content: "\25A0"; /* ■ */
  color: var(--accent);
  margin-right: 0.3rem;
  font-size: 0.5rem;
  vertical-align: 0.06em;
}
.tb-controls { display: flex; align-items: center; gap: 0.45rem; }

/* Thin vertical divider between groups; collapses on wrap */
.tb-sep {
  align-self: stretch;
  width: 1px;
  margin: 0.1rem 0.1rem 0;
  background: var(--border-strong);
}

.seg { display: inline-flex; border: 1px solid var(--border-strong); }
.seg-btn {
  background: transparent;
  color: var(--text);
  border: none;
  border-right: 1px solid var(--border-strong);
  padding: 0.45rem 0.9rem;
}
.seg-btn:last-child { border-right: none; }
.seg-btn:hover:not(:disabled):not(.active) { color: var(--heading); }
.seg-btn.active { background: var(--accent); color: #000; }

/* Trigger edge + help share the secondary-button look; keep them compact */
.btn-trig { padding: 0.45rem 0.8rem; }
.btn-trig.edge-fall { color: var(--trig); border-color: var(--trig); }

/* Fixed widths so swapping labels never reflows the toolbar (HW session):
   RUN/PAUSE swaps "RUN"<->"PAUSE", EDGE swaps "↑ RISE"<->"↓ FALL". Width is
   sized to the wider label; text centered so the control stays put. */
.btn-run-fixed { min-width: 6.2rem; text-align: center; }
.btn-edge-fixed { min-width: 5.4rem; text-align: center; }
/* SCALE: FIXED <-> SCALE: AUTO also swaps width — pin it to the wider label. */
.btn-scale-fixed { min-width: 9.4rem; text-align: center; }
.btn-help {
  padding: 0.45rem 0;
  width: 2.1rem;
  text-align: center;
  font-weight: 700;
}
.btn-help[aria-expanded="true"] { border-color: var(--accent); color: var(--accent); }

/* Keyboard-shortcuts legend popover */
.scope-plot { position: relative; }
.shortcut-pop {
  position: absolute;
  top: 0.4rem;
  right: 0;
  z-index: 5;
  min-width: 16rem;
  background: var(--card);
  border: 1px solid var(--border-strong);
  padding: 0.8rem 0.95rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}
.shortcut-pop-title {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.55rem;
}
.shortcut-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.32rem 0.85rem;
  margin: 0;
  align-items: center;
}
.shortcut-list dt { display: flex; gap: 0.25rem; }
.shortcut-list dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text);
}
.shortcut-list kbd {
  display: inline-block;
  min-width: 1.1rem;
  padding: 0.1rem 0.35rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--heading);
  background: var(--tile);
  border: 1px solid var(--border-strong);
}

#scopeCanvas {
  display: block;
  width: 100%;
  height: 280px;
  background: #000;
  border: 1px solid var(--border);
}

/* Live-mode overlay, top-left of the plot. A faint backdrop keeps it legible
   over the topmost volt-axis label and the grid. */
.scope-mode {
  position: absolute;
  top: 6px;
  left: 7px;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--text);
  text-transform: uppercase;
  white-space: nowrap;
  padding: 2px 6px;
  background: rgba(5, 5, 5, 0.78);
  border: 1px solid var(--border);
}
.scope-mode:empty { display: none; }
.scope-mode .sm-trig { color: var(--trig); }

/* Narrow widths: let the toolbar span the card, drop dividers, wrap cleanly */
@media (max-width: 760px) {
  .scope-toolbar { margin-left: 0; width: 100%; }
  .tb-sep { display: none; }
  .shortcut-pop { left: 0; right: auto; min-width: 0; width: 100%; }
}

.scope-readouts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  margin-top: 0.7rem;
  font-family: var(--mono);
}
.readout { display: flex; align-items: baseline; gap: 0.55rem; }
.readout-label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}
.readout-value {
  font-size: 0.95rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}
/* Trigger status readout: dim for OFF, accent yellow for a completed sweep
   (NORM / HOLD), orange while acquiring (WAIT prefill+wait / CAPT capturing). */
.readout-value.ro-dim { color: var(--text-dim); }
.readout-value.ro-armed { color: var(--trig); }

/* --------------------------- Collapsible cards -------------------------- */
/* A <details class="card"> collapses to its header row (summary = card-head),
   same mechanism as the event log. */

details.card > summary {
  cursor: pointer;
  user-select: none;
  list-style: none;          /* chevron below replaces the default marker */
  margin-bottom: 0;          /* header-only when collapsed */
}
details.card > summary::-webkit-details-marker { display: none; }
details.card[open] > summary { margin-bottom: 0.85rem; }
details.card > summary:hover .eyebrow { color: var(--heading); }
details.card > summary:hover .disclosure { color: var(--accent); }

.disclosure {
  flex: none;
  width: 0.8rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}
.disclosure::before { content: "\25B8"; } /* ▸ collapsed */
details[open] > summary .disclosure::before { content: "\25BE"; } /* ▾ expanded */

/* ------------------------------ Probe info ------------------------------ */
/* Full-width block above UART: grouped multi-column layout. */

.info-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem 2.5rem;
  align-items: start;
}

.info-group-title {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.info-caption {
  margin: 0.55rem 0 0;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--text-dim);
}

/* ------------------------------ UART bridge ----------------------------- */

.card-note {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.uart-meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.uart-count {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.uart-count span { color: var(--heading); font-variant-numeric: tabular-nums; }

.tag-warn {
  background: var(--accent);
  color: #000;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 0.18rem 0.5rem;
}

.uart-term {
  height: 234px; /* ~12 lines at 12px / 1.5 line-height */
  overflow-y: auto;
  background: #050505;
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: #c9c9cf;
  white-space: pre-wrap;
  word-break: break-all;
}

.uart-hex { color: var(--text-dim); }

.uart-tx-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.7rem;
}

.uart-input {
  flex: 1;
  min-width: 0;
  background: #0a0a0a;
  border: 1px solid var(--border-strong);
  color: var(--heading);
  font: inherit;
  font-family: var(--mono);
  font-size: 0.85rem;
  border-radius: 0;
  padding: 0.45rem 0.6rem;
}
.uart-input::placeholder { color: var(--text-dim); letter-spacing: 0.08em; }
.uart-input:focus { outline: 1px solid var(--accent); border-color: var(--accent); }
.uart-input:disabled { opacity: 0.4; }

.uart-lf-label {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}
.uart-lf-label input {
  width: 14px;
  height: 14px;
  margin: 0;
  accent-color: var(--accent);
}
.uart-lf-label input:disabled { opacity: 0.4; cursor: not-allowed; }

/* ------------------------------- Stats row ------------------------------ */

.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1rem 0;
}

.stat {
  flex: 1 1 140px;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 0.6rem 1rem;
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--heading);
}
.stat-value.crs { color: var(--text-dim); font-size: 1.05rem; padding: 0.17rem 0; }
.stat-value.crs.crs-on { color: var(--accent); }

.stat-label {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* ------------------------------- Event log ------------------------------ */

.log-card {
  background: var(--card);
  border: 1px solid var(--border);
}

#scopeCanvas { cursor: crosshair; }

/* ------------------------- Disconnected view ---------------------------- */
/* Only header + connect + the empty-state panel while no probe is open. */

.empty-state { display: none; }

body.disconnected .grid,
body.disconnected .stats-row,
body.disconnected .log-card { display: none; }

body.disconnected .empty-state {
  display: block;
  margin: 4rem auto;
  max-width: 30rem;
  padding: 2.2rem 2.5rem;
  text-align: center;
  background: var(--card);
  border: 1px solid var(--border);
}

.empty-title {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--heading);
}

.empty-sub {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.log-card summary {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  list-style: none;          /* same explicit chevron as the UART card */
  padding: 0.7rem 1.15rem;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text);
  user-select: none;
}
.log-card summary::-webkit-details-marker { display: none; }
.log-card summary:hover .disclosure { color: var(--accent); }
.log-card summary:hover { color: var(--heading); }

.log {
  max-height: 240px;
  overflow-y: auto;
  padding: 0 1.15rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.8rem;
}

.log-line { white-space: pre-wrap; padding: 1px 0; color: var(--text); }
.log-error { color: var(--red); }