/* ── RESET ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

/* ── FONTS ── */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Inter:wght@400;500;600;700&display=swap');

:root{
  --bg:#0a0a0f;
  --bg2:#12121a;
  --bg3:#1a1a28;
  --surface:#1e1e2e;
  --surface2:#2a2a3e;
  --border:#2a2a3e;
  --text:#c8c8d4;
  --text2:#8888a0;
  --text3:#5a5a72;
  --accent:#4ecdc4;
  --accent2:#ff6b6b;
  --yellow:#ffe66d;
  --orange:#ff9f43;
  --purple:#5f27cd;
  --pink:#f368e0;
  --blue:#54a0ff;
  --green:#00d2d3;
  --red:#ff4757;
  --ff-sans:'Inter',system-ui,sans-serif;
  --ff-mono:'JetBrains Mono','Consolas',monospace;
  --nav-height:44px;
  --toolbar-height:48px;
  --panel-width:220px;
  --prop-width:280px;
}

html,body{
  height:100%;
  background:var(--bg);
  color:var(--text);
  font-family:var(--ff-sans);
  font-size:13px;
  overflow:hidden;
}

/* ── APP LAYOUT ── */
.app{
  display:grid;
  grid-template-rows:var(--nav-height) var(--toolbar-height) 1fr;
  grid-template-columns:var(--panel-width) 1fr var(--prop-width);
  grid-template-areas:
    "nav nav nav"
    "tb tb tb"
    "palette editor props";
  height:100vh;
  width:100vw;
}

/* ── NAV ── */
.nav{
  grid-area:nav;
  background:var(--bg2);
  border-bottom:1px solid var(--border);
  display:flex;
  align-items:center;
  padding:0 1rem;
  gap:1rem;
}
.nav-logo{
  font-family:var(--ff-mono);
  font-weight:700;
  font-size:.85rem;
  color:var(--accent);
  letter-spacing:.05em;
}
.nav-logo span{color:var(--text2)}
.nav-info{
  margin-left:auto;
  font-size:.7rem;
  color:var(--text2);
  font-family:var(--ff-mono);
}

/* ── TOOLBAR ── */
.toolbar{
  grid-area:tb;
  background:var(--bg2);
  border-bottom:1px solid var(--border);
  display:flex;
  align-items:center;
  padding:0 1rem;
  gap:.4rem;
}
.toolbar .sep{
  width:1px;height:28px;
  background:var(--border);
  margin:0 .4rem;
}
.btn{
  font-family:var(--ff-sans);
  font-size:.75rem;
  font-weight:500;
  padding:.4rem .8rem;
  border:1px solid var(--border);
  border-radius:4px;
  background:var(--surface);
  color:var(--text);
  cursor:pointer;
  transition:all .15s;
  white-space:nowrap;
}
.btn:hover{background:var(--surface2);border-color:var(--text3)}
.btn.active{background:var(--accent);color:#000;border-color:var(--accent)}
.btn-sm{font-size:.65rem;padding:.25rem .5rem}
.btn-accent{border-color:var(--accent);background:var(--accent);color:#000;font-weight:700}
.btn-accent:hover{filter:brightness(1.2)}
.btn-danger{border-color:var(--red);color:var(--red)}
.btn-danger:hover{background:var(--red);color:#fff}
.scan-display{
  margin-left:auto;
  font-family:var(--ff-mono);
  font-size:.7rem;
  color:var(--text2);
}
.scan-display span{color:var(--accent)}

/* ── PALETTE ── */
.palette{
  grid-area:palette;
  background:var(--bg2);
  border-right:1px solid var(--border);
  overflow-y:auto;
  padding:.5rem;
}
.palette-category{margin-bottom:.5rem}
.palette-cat-title{
  font-size:.6rem;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.12em;
  color:var(--text3);
  padding:.3rem .5rem;
  margin-bottom:.2rem;
}
.palette-item{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding:.35rem .5rem;
  border-radius:4px;
  cursor:grab;
  transition:background .15s;
  user-select:none;
}
.palette-item:hover{background:var(--surface)}
.palette-item.dragging{opacity:.4}
.palette-swatch{
  width:10px;height:10px;
  border-radius:2px;
  flex-shrink:0;
}
.palette-label{
  font-family:var(--ff-mono);
  font-size:.72rem;
  font-weight:500;
  color:var(--text);
}
.palette-desc{
  font-size:.6rem;
  color:var(--text3);
  margin-left:auto;
}

/* ── LADDER EDITOR ── */
.ladder-editor{
  grid-area:editor;
  background:var(--bg);
  overflow:auto;
  height:100%;
}
.ladder-toolbar{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding:.4rem .8rem;
  border-bottom:1px solid var(--border);
  background:var(--bg3);
}
.ladder-title{
  font-family:var(--ff-mono);
  font-size:.72rem;
  color:var(--text2);
}
.ladder-tb-actions{margin-left:auto;display:flex;gap:.3rem}
.ladder-body{padding:.5rem}
.ladder-rungs{display:flex;flex-direction:column;gap:2px}

/* ── RUNG ── */
.rung{
  display:flex;
  align-items:stretch;
  min-height:48px;
  background:var(--bg2);
  border:1px solid var(--border);
  border-radius:4px;
  transition:border-color .15s;
}
.rung:hover{border-color:var(--text3)}
.rung-power-left,.rung-power-right{
  width:20px;
  flex-shrink:0;
  display:flex;
  align-items:center;
  justify-content:center;
}
.power-rail{
  width:3px;
  height:100%;
  min-height:48px;
  background:var(--text3);
  border-radius:2px;
}
.rung-cells{
  flex:1;
  display:flex;
  align-items:center;
  gap:2px;
  padding:4px 2px;
  overflow-x:auto;
}
.rung-actions{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:4px;
  opacity:0;
  transition:opacity .15s;
}
.rung:hover .rung-actions{opacity:.6}
.rung-actions:hover{opacity:1!important}
.btn-icon{
  width:20px;height:20px;
  border:none;
  background:transparent;
  color:var(--text3);
  cursor:pointer;
  font-size:.55rem;
  display:grid;place-items:center;
  border-radius:3px;
  transition:all .15s;
}
.btn-icon:hover{background:var(--surface);color:var(--text)}

/* ── ELEMENTS ── */
.el{
  position:relative;
  height:38px;
  border:1px solid var(--border);
  border-radius:4px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:all .15s;
  flex-shrink:0;
  background:var(--bg3);
  user-select:none;
}
.el:hover{border-color:var(--text2)}
.el.power-on{
  border-color:var(--accent);
  box-shadow:inset 0 0 8px rgba(78,205,196,.15),0 0 4px rgba(78,205,196,.1);
}
.el.selected{border-color:var(--yellow);box-shadow:0 0 0 1px var(--yellow)}
.el-body{
  display:flex;
  flex-direction:column;
  align-items:center;
  line-height:1.2;
}
.el-label{
  font-family:var(--ff-mono);
  font-size:.7rem;
  font-weight:600;
  color:var(--text);
}
.el-params{
  font-family:var(--ff-mono);
  font-size:.55rem;
  color:var(--text2);
}
.el-connectors{
  position:absolute;
  inset:0;
  pointer-events:none;
  display:flex;
  justify-content:space-between;
}
.el-conn-left,.el-conn-right{
  width:8px;
  height:3px;
  background:var(--text3);
  align-self:center;
}

/* ── EMPTY CELL ── */
.el.empty{
  width:24px;
  min-width:24px;
  border:1px dashed var(--border);
  background:transparent;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:all .2s;
}
.el.empty:hover{
  border-color:var(--accent);
  background:rgba(78,205,196,.05);
}
.el-add-hint{
  font-size:.7rem;
  color:var(--text3);
  font-weight:700;
}

/* ── PROPERTY PANEL ── */
.right-panel{grid-area:props;display:grid;grid-template-rows:auto 1fr auto;overflow:hidden}
.property-panel{
  background:var(--bg2);
  border-left:1px solid var(--border);
  overflow-y:auto;
  padding:.8rem;
}
.pp-empty{
  text-align:center;
  color:var(--text3);
  padding:2rem 0;
  font-size:.75rem;
}
.pp-header{
  font-family:var(--ff-mono);
  font-size:.75rem;
  font-weight:600;
  color:var(--accent);
  padding-bottom:.6rem;
  border-bottom:1px solid var(--border);
  margin-bottom:.8rem;
}
.pp-body{display:flex;flex-direction:column;gap:.6rem}
.pp-field{display:flex;flex-direction:column;gap:.25rem}
.pp-label{
  font-size:.65rem;
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--text2);
}
.pp-input{
  font-family:var(--ff-mono);
  font-size:.75rem;
  padding:.4rem .6rem;
  border:1px solid var(--border);
  border-radius:4px;
  background:var(--surface);
  color:var(--text);
  outline:none;
  transition:border-color .15s;
}
.pp-input:focus{border-color:var(--accent)}
.pp-apply{margin-top:.4rem}

/* ── IO PANEL ── */
.io-panel{
  display:flex;
  flex-direction:column;
  gap:1rem;
  padding:.5rem;
}
.io-title{
  font-size:.6rem;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.1em;
  color:var(--text3);
  margin-bottom:.4rem;
}
.io-grid{display:flex;flex-wrap:wrap;gap:.4rem}
.io-item{
  display:flex;
  align-items:center;
  gap:.3rem;
  padding:.25rem .4rem;
  border:1px solid var(--border);
  border-radius:3px;
  cursor:pointer;
  font-size:.65rem;
  transition:border-color .15s;
}
.io-item:hover{border-color:var(--text3)}
.io-item input[type="checkbox"]{accent-color:var(--accent)}
.io-output{cursor:default}
.io-led{
  width:8px;height:8px;
  border-radius:50%;
  background:#333;
  transition:background .1s;
}
.io-label{
  font-family:var(--ff-mono);
  font-size:.65rem;
  color:var(--text);
}
.io-val{
  font-family:var(--ff-mono);
  font-size:.55rem;
  color:var(--text3);
}



/* ── VARIABLE TABLE ── */
.var-panel{
  border-top:1px solid var(--border);
  padding:.5rem;
  overflow-y:auto;
}
.var-section-title{
  font-size:.6rem;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.1em;
  color:var(--text3);
  margin-bottom:.4rem;
}
.var-empty{
  font-size:.65rem;
  color:var(--text3);
  text-align:center;
  padding:1rem 0;
}
.var-item{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding:.2rem .3rem;
  font-size:.65rem;
  font-family:var(--ff-mono);
  border-radius:3px;
}
.var-item:hover{background:var(--surface)}
.var-name{color:var(--accent);width:40px}
.var-type{color:var(--text3);font-size:.55rem;width:60px}
.var-val{margin-left:auto;font-weight:500;font-size:.6rem}

/* ── CONTEXT MENU ── */
.context-menu{
  position:fixed;
  z-index:10000;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:6px;
  min-width:180px;
  padding:.3rem;
  box-shadow:0 8px 32px rgba(0,0,0,.5);
}
.cm-header{
  padding:.3rem .6rem;
  font-size:.6rem;
  text-transform:uppercase;
  letter-spacing:.1em;
  color:var(--text3);
  border-bottom:1px solid var(--border);
  margin-bottom:.2rem;
}
.cm-cat{
  padding:.2rem .6rem;
  font-size:.55rem;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--text2);
}
.cm-item{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding:.35rem .6rem;
  font-size:.72rem;
  color:var(--text);
  cursor:pointer;
  border-radius:4px;
  transition:background .1s;
}
.cm-item:hover{background:var(--surface2)}
.cm-danger{color:var(--red)}
.cm-swatch{
  width:8px;height:8px;
  border-radius:2px;
  flex-shrink:0;
}

/* ── SCROLLBARS ── */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text3)}

/* ── RESPONSIVE ── */
@media(max-width:900px){
  .app{
    grid-template-columns:160px 1fr;
    grid-template-areas:
      "nav nav"
      "tb tb"
      "palette editor";
  }
  .property-panel{display:none}
  :root{--panel-width:160px}
}

/* ── FB BLOCK ── */
.el-fb {
  width: 200px !important;
  min-width: 200px;
  height: auto !important;
  min-height: 80px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  padding: 0;
}
.el-fb:hover { border-color: var(--accent); }
.el-fb.power-on {
  box-shadow: 0 0 12px rgba(78,205,196,.2);
}
.fb-header {
  font-family: var(--ff-mono);
  font-size: .72rem;
  font-weight: 700;
  color: #fff;
  text-align: center;
  padding: 4px 8px;
  border-radius: 4px 4px 0 0;
  width: 100%;
}
.fb-body {
  display: flex;
  justify-content: space-between;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 4px 4px;
  width: 100%;
  padding: 4px 0;
}
.fb-inputs, .fb-outputs {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 2px 4px;
}
.fb-pin {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: .6rem;
  font-family: var(--ff-mono);
  color: var(--text2);
  padding: 1px 0;
}
.fb-output { justify-content: flex-end; }
.fb-pin-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.fb-output .fb-pin-dot { order: 1; }
.fb-pin-label { white-space: nowrap; }

/* ── Modbus Live Panel ────────────────────────────────────────────── */
#modbus-live-panel { padding: 8px; font-family: var(--ff-mono); font-size: .65rem; }
.ml-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; padding-bottom: 4px; border-bottom: 1px solid var(--border); }
.ml-title { font-size: .7rem; font-weight: 700; }
.ml-state { font-size: .6rem; padding: 2px 6px; border-radius: 3px; background: var(--surface); }
.ml-idle { color: var(--text2); }
.ml-active { color: var(--accent); background: rgba(78,205,196,.15); }
.ml-fault { color: var(--red); background: rgba(255,107,107,.15); }
.ml-section { margin-bottom: 8px; }
.ml-section-title { font-size: .6rem; font-weight: 600; color: var(--text2); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .05em; }
.ml-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.ml-grid-item { display: flex; align-items: center; gap: 4px; background: var(--surface); padding: 2px 4px; border-radius: 2px; }
.ml-glabel { color: var(--accent); min-width: 42px; }
.ml-gval { color: var(--text); font-weight: 600; min-width: 20px; text-align: right; }
.ml-ghint { color: var(--text2); font-size: .55rem; margin-left: auto; }
.ml-bits { display: flex; flex-wrap: wrap; gap: 2px; }
.ml-bit { display: flex; align-items: center; gap: 3px; padding: 2px 4px; border-radius: 2px; background: var(--surface); font-size: .6rem; cursor: default; }
.ml-wbit { cursor: pointer; border: 1px solid transparent; }
.ml-wbit:hover { border-color: var(--accent); }
.ml-bit-led { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.ml-bit-led.on { background: var(--accent); box-shadow: 0 0 4px var(--accent); }
.ml-bit-led.off { background: #333; }
.ml-bit-name { color: var(--text2); }
.ml-bit-pos { color: var(--text3); font-size: .5rem; }
.ml-io-grid { display: flex; flex-wrap: wrap; gap: 2px; }
.ml-io-item { display: flex; align-items: center; gap: 3px; padding: 2px 5px; border-radius: 2px; background: var(--surface); font-size: .6rem; }
.ml-io-on { border-color: var(--accent); }
.ml-io-led { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.ml-io-led.on { background: var(--accent); box-shadow: 0 0 4px var(--accent); }
.ml-io-led.off { background: #333; }
.ml-io-name { color: var(--text); }
.ml-actions { display: flex; flex-wrap: wrap; gap: 4px; }
.ml-actions .btn { font-size: .55rem; padding: 2px 6px; }