:root{
  --bg:#eef1f5;
  --panel:#ffffff;
  --ink:#1b2430;
  --ink-soft:#5b6b7c;
  --line:#d6dee7;
  --accent:#0b6cb1;
  --accent-soft:#e3f0fa;
  --port:#c2410c;
  --port-h:#94a3b8;
  --danger:#b91c1c;
  --board:#fbfcfd;
  --shadow:0 1px 2px rgba(16,32,48,.06),0 4px 12px rgba(16,32,48,.07);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:14px/1.45 "Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  overflow:hidden;
}
button{font:inherit;cursor:pointer}

/* ---------------- barre superieure ---------------- */
#topbar{
  height:52px;display:flex;align-items:center;gap:18px;padding:0 16px;
  background:var(--panel);border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  position:relative;z-index:20;
}
.brand{font-size:18px;font-weight:600;letter-spacing:-.2px}
.brand span{color:var(--accent)}
.tools{display:flex;align-items:center;gap:8px}
.tool-label{color:var(--ink-soft);font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.tools button{
  padding:6px 11px;border:1px solid var(--line);background:#fff;border-radius:6px;
  color:var(--ink);transition:background .12s,border-color .12s;
}
.tools button:hover{background:#f2f6fa;border-color:#bcc9d6}
.tools button:disabled{opacity:.4;cursor:default;background:#fff}
.tools button.danger{color:var(--danger);border-color:#f0d2d2}
.tools button.danger:hover{background:#fdf2f2}
.seg{display:flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.seg button{border:0;border-radius:0;background:#fff;padding:6px 14px;font-size:16px;line-height:1}
.seg button+button{border-left:1px solid var(--line)}
.seg button.on{background:var(--accent);color:#fff}
.seg button.on:hover{background:var(--accent)}
.sep{width:1px;height:24px;background:var(--line)}
.hint{margin-left:auto;color:var(--ink-soft);font-size:13px;max-width:46ch;text-align:right}
.hint.warn{color:var(--danger)}

/* ---------------- disposition ---------------- */
#app{display:flex;height:calc(100% - 52px)}
aside{background:var(--panel);display:flex;flex-direction:column;min-height:0}
#palette{width:268px;border-right:1px solid var(--line)}
#result{width:340px;border-left:1px solid var(--line);padding:14px;gap:12px;overflow-y:auto}

/* ---------------- palette ---------------- */
.pal-search{padding:10px;border-bottom:1px solid var(--line)}
.pal-search input,.pal-custom input{
  width:100%;padding:7px 10px;border:1px solid var(--line);border-radius:6px;
  font:inherit;color:var(--ink);background:#fff;
}
.pal-search input:focus,.pal-custom input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
#pal-list{flex:1;overflow-y:auto;padding:4px 0 10px}
.cat>summary{
  padding:7px 12px;font-weight:600;font-size:12.5px;color:var(--ink-soft);
  text-transform:uppercase;letter-spacing:.05em;cursor:pointer;user-select:none;
  background:#f7f9fb;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:2;
}
.cat>summary::marker{color:var(--accent)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:8px}
.frag{
  border:1px solid var(--line);border-radius:8px;background:#fff;padding:4px 2px 2px;
  display:flex;flex-direction:column;align-items:center;cursor:pointer;
  transition:border-color .12s,box-shadow .12s,transform .06s;
}
.frag:hover{border-color:var(--accent);box-shadow:0 2px 8px rgba(11,108,177,.15)}
.frag:active{transform:scale(.97)}
.frag svg{width:100%;height:58px;display:block}
.frag .nm{font-size:10.5px;color:var(--ink-soft);text-align:center;line-height:1.2;
  padding:2px 3px 3px;word-break:break-word}
.pal-custom{border-top:1px solid var(--line);padding:10px;display:flex;flex-direction:column;gap:7px}
.pal-custom label{font-size:12px;font-weight:600;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em}
.pal-custom button{
  padding:7px;border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:6px;
}
.pal-custom button:hover{background:#095c97}
.pal-custom .note{margin:0;font-size:11px;color:var(--ink-soft);line-height:1.35}
.pal-custom code{background:#eef2f6;padding:0 3px;border-radius:3px;font-size:10.5px}

/* ---------------- plan de travail ---------------- */
#board{
  flex:1;position:relative;overflow:hidden;background:var(--board);
  background-image:radial-gradient(#d9e1ea 1px,transparent 1px);
  background-size:22px 22px;cursor:grab;
}
#board.panning{cursor:grabbing}
#world{position:absolute;top:0;left:0;transform-origin:0 0}
#wires{position:absolute;top:0;left:0;width:6000px;height:6000px;pointer-events:none;overflow:visible}
#wires line,#wires path{pointer-events:stroke}
#nodes{position:absolute;top:0;left:0}

.node{
  position:absolute;background:#fff;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow);user-select:none;cursor:move;
}
.node.sel{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft),var(--shadow)}
.node .body{position:relative}
.node svg{display:block;pointer-events:none}
.node .cap{
  position:absolute;left:0;right:0;bottom:-17px;text-align:center;font-size:10.5px;
  color:var(--ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.node .del{
  position:absolute;top:-9px;right:-9px;width:19px;height:19px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--danger);font-size:13px;line-height:1;
  display:none;align-items:center;justify-content:center;padding:0;
}
.node:hover .del{display:flex}
.node .del:hover{background:#fdf2f2;border-color:#f0d2d2}

.port{
  position:absolute;border-radius:50%;transform:translate(-50%,-50%);
  cursor:pointer;transition:transform .1s,background .1s;
}
.port.r{width:15px;height:15px;background:#fff;border:2.5px solid var(--port)}
.port.r:hover{transform:translate(-50%,-50%) scale(1.28);background:#ffe9df}
.port.h{width:9px;height:9px;background:#fff;border:2px solid var(--port-h);opacity:0}
.node:hover .port.h{opacity:.75}
.port.h:hover{opacity:1;transform:translate(-50%,-50%) scale(1.5);border-color:var(--accent)}
.port.used{background:var(--port);border-color:var(--port);cursor:default;opacity:.45}
.port.used:hover{transform:translate(-50%,-50%)}
.node .port.armed{
  background:var(--accent);border-color:var(--accent);opacity:1;
  box-shadow:0 0 0 5px rgba(11,108,177,.22);
}

#board-empty{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:6px;color:var(--ink-soft);pointer-events:none;text-align:center;
}
#board-empty p{margin:0;font-size:17px;font-weight:600}
#board-empty span{max-width:42ch;font-size:13px}
#zoom-badge{
  position:absolute;right:10px;bottom:10px;background:rgba(255,255,255,.92);
  border:1px solid var(--line);border-radius:6px;padding:3px 8px;font-size:11.5px;
  color:var(--ink-soft);pointer-events:none;
}

/* ---------------- panneau resultat ---------------- */
#result h2{margin:0;font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft)}
#preview{
  border:1px solid var(--line);border-radius:10px;background:#fff;min-height:220px;
  display:flex;align-items:center;justify-content:center;overflow:hidden;
}
#preview svg{max-width:100%;height:auto}
#preview .ph{color:#c3ccd6;font-size:32px}
.smiles-block{display:flex;flex-direction:column;gap:5px}
.smiles-head{display:flex;align-items:center;justify-content:space-between}
.smiles-head span{font-size:12px;font-weight:600;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em}
.smiles-head button{padding:4px 10px;border:1px solid var(--line);background:#fff;border-radius:6px}
.smiles-head button:hover{background:#f2f6fa}
#smiles{
  width:100%;resize:vertical;border:1px solid var(--line);border-radius:8px;padding:8px 9px;
  font:12.5px/1.45 "SFMono-Regular",Consolas,"Liberation Mono",monospace;
  color:var(--ink);background:#fbfcfd;
}
#msg{font-size:12.5px;color:var(--danger);min-height:1em}
#msg.info{color:var(--ink-soft)}
#props{width:100%;border-collapse:collapse;font-size:12.5px}
#props th{
  text-align:left;font-weight:500;color:var(--ink-soft);padding:5px 0;
  border-bottom:1px solid #eef2f6;width:52%;
}
#props td{text-align:right;padding:5px 0;border-bottom:1px solid #eef2f6;font-variant-numeric:tabular-nums}
.mono{font-family:"SFMono-Regular",Consolas,monospace}
.small{font-size:11px}
.exports{display:flex;gap:8px}
.exports button{
  flex:1;padding:7px;border:1px solid var(--line);background:#fff;border-radius:6px;
}
.exports button:hover{background:#f2f6fa}

@media (max-width:1180px){
  #palette{width:224px}
  #result{width:290px}
}