sdr-wideband-suite/web/style.css

/* ═══════════════════════════════════════════════════
   SPECTRE UI — HYBRID COCKPIT THEME
   Merges Spectre layout + Cockpit aesthetics
   All dynamic classes from app.js preserved
   ═══════════════════════════════════════════════════ */

@charset "UTF-8";

:root {
  --bg:       #050810;
  --bg2:      #0a0e18;
  --panel:    rgba(11, 16, 26, 0.88);
  --panel-2:  rgba(8, 12, 20, 0.82);
  --line:     rgba(30, 48, 72, 0.55);
  --line-hi:  rgba(50, 78, 116, 0.5);
  --text:     #d0dced;
  --text-dim: #6b84a3;
  --text-mute:#3a5070;
  --accent:   #00ffc8;
  --accent2:  #0090ff;
  --warn:     #ffb454;
  --danger:   #ff6b81;
  --good:     #7cfb83;
  --glow:     rgba(0, 255, 200, 0.06);
  --shadow:   0 20px 64px rgba(0, 0, 0, 0.4);
  --r:        14px;
  --r-sm:     8px;
  --r-lg:     18px;
  --font:     'Outfit', system-ui, sans-serif;
  --mono:     'JetBrains Mono', 'Consolas', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 13.5px; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Subtle grid + glow background */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 70% 45% at 15% 8%, rgba(0, 144, 255, 0.05), transparent),
    radial-gradient(ellipse 50% 35% at 85% 92%, rgba(0, 255, 200, 0.03), transparent),
    repeating-linear-gradient(0deg, transparent, transparent 79px, rgba(30, 48, 72, 0.15) 79px, rgba(30, 48, 72, 0.15) 80px),
    repeating-linear-gradient(90deg, transparent, transparent 79px, rgba(30, 48, 72, 0.15) 79px, rgba(30, 48, 72, 0.15) 80px);
  pointer-events: none; z-index: 0;
}

button, input, select { font: inherit; }
::selection { background: rgba(0, 255, 200, 0.18); color: #fff; }
*:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Scrollbars ── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(100, 130, 180, 0.22); border-radius: 99px; }

/* ═══════════ SHELL ═══════════ */
.shell { height: 100%; display: grid; grid-template-rows: auto 1fr; position: relative; z-index: 1; }

/* ═══════════ TOPBAR ═══════════ */
.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 10px 18px;
  background: linear-gradient(180deg, rgba(10, 15, 24, 0.96), rgba(6, 9, 14, 0.92));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  position: relative;
}
.topbar::after {
  content: ''; position: absolute; bottom: -1px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent); opacity: 0.25;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { flex-shrink: 0; }
.brand-kicker { font-family: var(--mono); font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--text-dim); }
.brand-title { font-size: 1.4rem; font-weight: 800; letter-spacing: -0.02em; color: #fff; }
.brand-thin { font-weight: 300; color: var(--text-dim); margin-left: 1px; }

.topbar-center { display: flex; justify-content: center; }
.topbar-right { display: flex; align-items: center; justify-content: flex-end; gap: 10px; }

/* topbar center intentionally left available for future status content */
.topbar-center { min-height: 1px; }

.ws-badge {
  font-family: var(--mono); font-size: 0.68rem; font-weight: 500;
  padding: 3px 10px; border-radius: 99px;
  background: rgba(0, 255, 200, 0.06); border: 1px solid rgba(0, 255, 200, 0.15);
  color: var(--accent); white-space: nowrap; transition: border-color 0.2s;
}

.top-meta { font-family: var(--mono); font-size: 0.65rem; color: var(--text-dim); max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.shortcut-btn {
  display: flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 8px;
  background: rgba(255,255,255,0.03); border: 1px solid var(--line);
  color: var(--text-dim); cursor: pointer; transition: all 0.15s;
}
.shortcut-btn:hover { color: var(--accent); border-color: rgba(0, 255, 200, 0.3); }

/* ═══════════ MAIN LAYOUT ═══════════ */
.layout {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(310px, 420px);
  grid-template-rows: minmax(0, 1fr) 240px;
  gap: 8px;
  padding: 8px;
}

/* ═══════════ PANELS ═══════════ */
.panel {
  min-height: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}
.panel::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 5%, rgba(255,255,255,0.04) 50%, transparent 95%);
  pointer-events: none;
}

.panel-title { font-size: 1.05rem; font-weight: 700; }
.panel-sub { font-size: 0.72rem; color: var(--text-dim); margin-top: 1px; }

/* ═══════════ STAGE ═══════════ */
.stage {
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  gap: 10px;
  padding: 12px;
}

.stage-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.stage-actions { display: flex; gap: 4px; }

/* Action Buttons */
.act-btn {
  font-family: var(--mono); font-size: 0.68rem; font-weight: 500;
  padding: 5px 10px; border-radius: var(--r-sm);
  background: var(--bg2); border: 1px solid var(--line);
  color: var(--text); cursor: pointer; transition: all 0.12s; white-space: nowrap;
}
.act-btn:hover { border-color: rgba(0, 255, 200, 0.3); transform: translateY(-1px); }
.act-btn--danger { border-color: rgba(255, 107, 129, 0.25); }
.act-btn--danger:hover { border-color: rgba(255, 107, 129, 0.5); color: var(--danger); }

/* Hero Metrics */
.hero-metrics { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 6px; }
.metric {
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: var(--r); padding: 8px 10px;
}
.metric-lbl { display: block; font-family: var(--mono); font-size: 0.58rem; font-weight: 600; letter-spacing: 0.1em; color: var(--text-mute); text-transform: uppercase; }
.metric-val { display: block; margin-top: 3px; font-family: var(--mono); font-size: 1rem; font-weight: 700; }
.metric-val--accent { color: var(--accent); }

/* Band Navigator */
.nav-strip { display: grid; gap: 4px; }
.nav-label { font-family: var(--mono); font-size: 0.58rem; font-weight: 600; letter-spacing: 0.1em; color: var(--text-mute); text-transform: uppercase; }
#navCanvas { height: 50px; border-radius: var(--r-sm); cursor: crosshair; }

/* Viz Stack */
.viz-stack {
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(200px, 1fr) minmax(150px, 0.72fr);
  gap: 8px;
}

.viz-card {
  min-height: 0; display: grid; grid-template-rows: auto minmax(0, 1fr);
  gap: 5px; padding: 8px;
  border-radius: var(--r); background: rgba(5, 8, 14, 0.6); border: 1px solid var(--line);
}
.viz-card--compact { }
.viz-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.viz-legend { display: inline-flex; align-items: center; gap: 6px; font-size: 0.68rem; color: var(--text-dim); }
.legend-swatch { width: 10px; height: 10px; border-radius: 2px; background: rgba(255, 204, 102, 0.35); border: 1px solid rgba(255, 204, 102, 0.35); }
.viz-label { font-family: var(--mono); font-size: 0.6rem; font-weight: 600; letter-spacing: 0.1em; color: var(--text-dim); text-transform: uppercase; }
.viz-hint { font-family: var(--mono); font-size: 0.58rem; color: var(--text-mute); }

canvas { display: block; width: 100%; height: 100%; border-radius: var(--r-sm); background: #030508; }
.signal-popover {
  position: absolute; z-index: 8; pointer-events: none; min-width: 180px; max-width: 220px;
  padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line-hi);
  background: rgba(6, 10, 18, 0.94); box-shadow: 0 18px 50px rgba(0,0,0,0.38);
  font-size: 0.72rem; color: var(--text); display: none; opacity: 0; transform: translateY(4px);
}
.signal-popover.open { display: block; opacity: 1; transform: translateY(0); transition: opacity 90ms ease, transform 90ms ease; }
.signal-popover__title { font-family: var(--mono); font-weight: 700; margin-bottom: 4px; color: var(--accent); }
.signal-popover__meta { color: var(--text-mute); margin-bottom: 6px; }
.signal-popover__scores { display: grid; gap: 4px; }
.signal-popover__row { display: grid; grid-template-columns: 42px 1fr 36px; gap: 6px; align-items: center; font-family: var(--mono); font-size: 0.68rem; }
.signal-popover__bar { height: 6px; border-radius: 999px; background: rgba(148,163,184,0.14); overflow: hidden; }
.signal-popover__fill { height: 100%; background: linear-gradient(90deg, rgba(0,255,200,0.72), rgba(0,144,255,0.8)); }
#spectrum, #waterfall { cursor: crosshair; }
#spectrum:active { cursor: grabbing; }

/* ═══════════ OPERATOR RAIL ═══════════ */
.rail {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 10px;
  padding: 12px;
}

.rail-head { display: flex; align-items: center; justify-content: space-between; }

/* Rail Tabs */
.rail-tabs { display: flex; gap: 3px; background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 3px; }
.rail-tab {
  flex: 1; text-align: center;
  font-family: var(--mono); font-size: 0.68rem; font-weight: 500;
  padding: 5px 8px; border-radius: 7px;
  background: transparent; border: 1px solid transparent;
  color: var(--text-dim); cursor: pointer; transition: all 0.15s;
}
.rail-tab:hover { color: var(--text); }
.rail-tab.active {
  background: rgba(0, 255, 200, 0.08); border-color: rgba(0, 255, 200, 0.18);
  color: var(--accent);
}

.rail-body { min-height: 0; position: relative; }

.tab-panel { display: none; height: 100%; overflow: auto; padding-right: 4px; }
.tab-panel.active { display: block; }
.tab-panel[data-panel="signals"] {
  display: none;
  height: 100%;
}
.tab-panel[data-panel="signals"].active {
  display: grid;
  grid-template-rows: auto minmax(120px, 1fr) auto auto auto auto;
  gap: 8px;
  min-height: 0;
}

/* ── Form Groups ── */
.form-group {
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 10px; margin-bottom: 8px;
  background: rgba(255, 255, 255, 0.01);
}
.grp-title { font-family: var(--mono); font-size: 0.6rem; font-weight: 600; letter-spacing: 0.12em; color: var(--accent); opacity: 0.7; margin-bottom: 8px; text-transform: uppercase; }

.field { display: grid; gap: 3px; margin-bottom: 8px; }
.field:last-child { margin-bottom: 0; }
.field > span { font-family: var(--mono); font-size: 0.64rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }

.field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.field-pair .field { margin-bottom: 0; }

/* Inputs */
input[type="number"], select {
  width: 100%; font-family: var(--mono); font-size: 0.82rem; color: var(--text);
  background: var(--bg2); border: 1px solid var(--line); border-radius: var(--r-sm);
  padding: 6px 8px; outline: none; transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none; appearance: none;
}
input[type="number"]:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(0, 255, 200, 0.06); }

select {
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%235a6e84' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center; padding-right: 24px;
}

/* Presets */
.preset-row { display: flex; gap: 4px; margin-bottom: 8px; }
.preset-btn {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 0;
  font-family: var(--mono); background: var(--bg2); border: 1px solid var(--line);
  border-radius: var(--r-sm); padding: 5px 4px 4px; cursor: pointer; color: var(--text); transition: all 0.15s;
}
.preset-btn:hover { border-color: var(--accent); background: rgba(0, 255, 200, 0.04); box-shadow: 0 0 8px rgba(0, 255, 200, 0.08); }
.preset-btn b { font-size: 0.76rem; font-weight: 700; color: var(--accent); line-height: 1; }
.preset-btn small { font-size: 0.58rem; color: var(--text-dim); line-height: 1.3; }

/* Sliders */
.slider-field { margin-bottom: 8px; }
.slider-field > span { display: block; font-family: var(--mono); font-size: 0.64rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
.slider-row { display: flex; align-items: center; gap: 6px; }
.slider-row em { font-family: var(--mono); font-size: 0.58rem; color: var(--text-mute); font-style: normal; width: 16px; flex-shrink: 0; }
.slider-num { width: 50px; text-align: center; flex-shrink: 0; font-size: 0.78rem; padding: 4px 4px; }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  flex: 1; height: 4px; border-radius: 2px; background: var(--line); outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: 2px solid var(--bg);
  box-shadow: 0 0 8px rgba(0, 255, 200, 0.3); cursor: pointer; transition: box-shadow 0.15s;
}
input[type="range"]::-webkit-slider-thumb:hover { box-shadow: 0 0 14px rgba(0, 255, 200, 0.5); }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%; background: var(--accent);
  border: 2px solid var(--bg); box-shadow: 0 0 8px rgba(0, 255, 200, 0.3); cursor: pointer;
}
.range--warn::-webkit-slider-thumb { background: var(--warn); box-shadow: 0 0 8px rgba(255, 180, 84, 0.3); }
.range--warn::-moz-range-thumb { background: var(--warn); box-shadow: 0 0 8px rgba(255, 180, 84, 0.3); }

/* Toggle Pills */
.toggle-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; margin-top: 4px; }
.pill-toggle {
  display: flex; align-items: center; gap: 6px; cursor: pointer; user-select: none;
  padding: 4px 6px; border-radius: var(--r-sm);
  border: 1px solid transparent; transition: border-color 0.15s;
}
.pill-toggle:hover { border-color: var(--line); }
.pill-toggle input { display: none; }
.pt {
  width: 28px; height: 15px; border-radius: 8px; background: var(--line);
  position: relative; flex-shrink: 0; transition: background 0.2s;
}
.pk {
  position: absolute; top: 2px; left: 2px; width: 11px; height: 11px; border-radius: 50%;
  background: var(--text-dim); transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}
.pill-toggle input:checked ~ .pt { background: rgba(0, 255, 200, 0.2); }
.pill-toggle input:checked ~ .pt .pk { transform: translateX(13px); background: var(--accent); box-shadow: 0 0 6px rgba(0, 255, 200, 0.4); }
.pl { font-family: var(--mono); font-size: 0.68rem; font-weight: 500; color: var(--text-dim); letter-spacing: 0.03em; }
.pill-toggle input:checked ~ .pt ~ .pl { color: var(--accent); }

/* ═══════════ LISTS (Signals + Events) ═══════════ */
.list-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.count-pill {
  font-family: var(--mono); font-size: 0.62rem; font-weight: 500;
  padding: 2px 8px; border-radius: 99px;
  background: rgba(0, 255, 200, 0.06); border: 1px solid rgba(0, 255, 200, 0.12);
  color: var(--accent);
}
.signal-list, .event-list { display: grid; gap: 5px; }
.signal-list {
  min-height: 0;
  overflow: auto;
  align-content: start;
  padding-right: 2px;
}
.empty-state { font-size: 0.78rem; color: var(--text-mute); padding: 12px 0; }

/* List items — rendered by app.js */
.list-item {
  padding: 9px 10px; border-radius: var(--r); border: 1px solid var(--line);
  background: var(--panel-2); cursor: pointer; transition: border-color 0.12s;
}
.list-item:hover, .list-item.active { border-color: rgba(0, 255, 200, 0.28); }
.list-item.listening { border-color: rgba(255, 92, 92, 0.55); box-shadow: 0 0 0 1px rgba(255, 92, 92, 0.35) inset; }
.item-top, .item-bottom { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.item-top { margin-bottom: 3px; }
.item-title { font-family: var(--mono); font-size: 0.82rem; font-weight: 700; color: #e7f1ff; }
.item-meta { font-family: var(--mono); font-size: 0.68rem; color: var(--text-dim); }
.item-badge {
  font-family: var(--mono); font-size: 0.64rem; font-weight: 600;
  padding: 2px 7px; border-radius: 99px;
  background: rgba(15, 25, 40, 0.8); border: 1px solid var(--line);
}

.listen-meta {
  margin-top: 2px;
  padding: 8px 10px;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: rgba(5, 8, 14, 0.72);
  display: grid;
  gap: 5px;
}
.listen-meta__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.listen-meta__title {
  font-family: var(--mono);
  font-size: 0.56rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.listen-meta__badge {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(15, 25, 40, 0.8);
  color: var(--text-dim);
}
.listen-meta__primary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.listen-meta__mode {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
}
.listen-meta__stereo {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
}
.listen-meta__secondary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.63rem;
  color: var(--text-dim);
}

.signal-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.signal-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex-wrap: wrap;
}
.item-meta--runtime {
  color: var(--accent);
  font-weight: 700;
}
.item-meta--classifier {
  opacity: 0.72;
}
.item-meta--live {
  color: #fff;
  font-weight: 700;
}

/* Health Grid */
.health-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.health-card {
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: var(--r); padding: 10px;
}
.health-card--wide { grid-column: 1 / -1; }
.health-lbl { display: block; font-family: var(--mono); font-size: 0.58rem; font-weight: 600; letter-spacing: 0.1em; color: var(--text-mute); text-transform: uppercase; }
.health-val { display: block; margin-top: 4px; font-family: var(--mono); font-size: 1.05rem; font-weight: 700; }

/* ═══════════ TIMELINE PANEL ═══════════ */
.tl-panel {
  grid-column: 1 / -1;
  display: grid; grid-template-rows: auto minmax(0, 1fr);
  gap: 8px; padding: 10px;
}
.tl-head { display: flex; align-items: center; justify-content: space-between; }
.tl-actions { display: flex; gap: 4px; }
.tl-stack {
  min-height: 0;
  display: grid;
  grid-template-rows: 64px minmax(0, 1fr);
  gap: 6px;
}

/* ═══════════ INSPECTOR DRAWER ═══════════ */
.inspector {
  position: fixed; right: 12px; top: 60px; bottom: 12px;
  width: min(440px, calc(100vw - 24px)); z-index: 50;
  display: none; grid-template-rows: auto minmax(0, 1fr);
  gap: 10px; padding: 12px;
  background: rgba(8, 12, 20, 0.94);
  border: 1px solid var(--line-hi); border-radius: var(--r-lg);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.5), 0 0 1px rgba(0, 255, 200, 0.08);
  backdrop-filter: blur(20px) saturate(130%);
  animation: drawerIn 0.2s ease-out;
}
@keyframes drawerIn { from { opacity: 0; transform: translateX(16px); } to { opacity: 1; transform: translateX(0); } }
.inspector.open { display: grid; }

.insp-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.insp-actions { display: flex; gap: 4px; flex-shrink: 0; }
.insp-body { min-height: 0; overflow: auto; display: grid; gap: 10px; align-content: start; }

.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.detail-item {
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: var(--r-sm); padding: 8px;
}
.detail-label { display: block; font-family: var(--mono); font-size: 0.56rem; font-weight: 600; letter-spacing: 0.1em; color: var(--text-mute); text-transform: uppercase; }
.detail-item span:last-child { display: block; margin-top: 4px; font-family: var(--mono); font-size: 0.85rem; font-weight: 700; }

.insp-viz { height: 200px; }
.insp-note { font-size: 0.72rem; color: var(--text-mute); }
.score-bars { display: grid; gap: 6px; }
.score-bar { display: grid; grid-template-columns: 52px 1fr 44px; gap: 8px; align-items: center; font-family: var(--mono); font-size: 0.68rem; }
.score-bar-label { color: var(--text-dim); }
.score-bar-track { position: relative; height: 8px; border-radius: 999px; background: rgba(148, 163, 184, 0.14); overflow: hidden; }
.score-bar-fill { position: absolute; inset: 0 auto 0 0; background: linear-gradient(90deg, rgba(0,255,200,0.72), rgba(0,144,255,0.8)); border-radius: 999px; }
.score-bar-value { color: var(--text-mute); text-align: right; }

/* ═══════════ KEYBOARD OVERLAY ═══════════ */
.kb-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(5, 8, 16, 0.8); backdrop-filter: blur(8px);
  display: none; align-items: center; justify-content: center;
}
.kb-overlay.open { display: flex; }
.kb-card {
  background: var(--panel); border: 1px solid var(--line-hi);
  border-radius: var(--r-lg); padding: 24px 28px;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5); min-width: 320px;
}
.kb-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }
.kb-grid {
  display: grid; grid-template-columns: auto 1fr; gap: 8px 16px;
  align-items: center; margin-bottom: 16px;
}
.kb-grid kbd {
  font-family: var(--mono); font-size: 0.72rem; font-weight: 600;
  padding: 3px 8px; border-radius: 5px;
  background: var(--bg2); border: 1px solid var(--line);
  color: var(--accent); text-align: center; min-width: 36px;
}
.kb-grid span { font-size: 0.82rem; color: var(--text-dim); }
.kb-close { width: 100%; justify-content: center; display: flex; }

/* ═══════════ ANIMATIONS ═══════════ */
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ═══════════ RESPONSIVE ═══════════ */
@media (max-width: 1320px) {
  .layout { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) minmax(360px, auto) 240px; }
  .rail { grid-column: 1; grid-row: 2; }
  .tl-panel { grid-column: 1; grid-row: 3; }
  .topbar { grid-template-columns: 1fr; gap: 8px; }
  .topbar-center, .topbar-right { justify-content: flex-start; }
  .hero-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .layout { padding: 6px; gap: 6px; }
  .hero-metrics, .detail-grid, .health-grid { grid-template-columns: 1fr; }
  .field-pair { grid-template-columns: 1fr; }
  .toggle-grid { grid-template-columns: 1fr; }
  .inspector { left: 8px; width: auto; }
  .top-meta { display: none; }
}

@media (max-width: 500px) {
  html { font-size: 12.5px; }
  .mode-strip { flex-wrap: wrap; }
}

/* Number input spin buttons */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { opacity: 0.3; }
input[type="number"]:hover::-webkit-inner-spin-button { opacity: 0.7; }

/* Active live-listen button */
.act-btn.active {
  background: var(--accent);
  color: var(--bg-0);
  box-shadow: 0 0 12px rgba(0, 255, 200, 0.3);
  animation: listen-pulse 1.5s ease-in-out infinite;
}
@keyframes listen-pulse {
  0%, 100% { box-shadow: 0 0 8px rgba(0, 255, 200, 0.2); }
  50% { box-shadow: 0 0 16px rgba(0, 255, 200, 0.5); }
}