:root{
  --bg:#1c1f1a;
  --bg-panel:#23271f;
  --bg-card:#2a2e24;
  --green:#7fbf3f;
  --green-bright:#9fe855;
  --green-dark:#4a5c33;
  --teal:#2ec6c6;
  --gray:#555c4d;
  --gray-dark:#3a3d34;
  --text:#e8ecd8;
  --text-dim:#9aa08a;
  --orange:#e0932a;
  --danger:#b4432b;
}

*{box-sizing:border-box;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Segoe UI',Roboto,Arial,sans-serif;
  font-size:14px;
}
#app{display:flex;flex-direction:column;min-height:100vh;}

.topbar{
  display:flex;align-items:center;justify-content:space-between;
  background:#15170f;padding:10px 20px;border-bottom:1px solid #333;
}
.crumb{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--text);}
.crumb-sep{color:var(--text-dim);}
.branch-select{
  background:var(--bg-card);color:var(--green-bright);border:1px solid var(--green-dark);
  padding:4px 8px;border-radius:4px;font-weight:600;
}
.respect-counter{color:var(--text-dim);font-size:13px;}
.respect-counter #respectUsed{color:var(--green-bright);font-weight:700;}
.icon-btn{background:none;border:1px solid #444;color:var(--text-dim);border-radius:6px;padding:4px 8px;cursor:pointer;}
.icon-btn:hover{color:var(--text);border-color:var(--green);}

.toolbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 20px;background:#191c14;border-bottom:1px solid #2c2f26;flex-wrap:wrap;
}
.sim-title-input{
  background:var(--bg-card);border:1px solid var(--gray-dark);color:var(--text);
  padding:6px 10px;border-radius:6px;min-width:220px;
}
.toolbar-buttons{display:flex;gap:8px;flex-wrap:wrap;}
.toolbar-buttons button{
  background:var(--bg-card);color:var(--green-bright);border:1px solid var(--green-dark);
  padding:6px 12px;border-radius:6px;cursor:pointer;font-weight:600;font-size:12.5px;
  transition:background .15s;
}
.toolbar-buttons button:hover{background:var(--green-dark);color:#fff;}

.panel-wrap{
  display:flex;flex:1;padding:24px;gap:24px;background:var(--bg);position:relative;
  overflow-x:auto;
}
.panel{flex:1;min-width:900px;}

/* ---------- Branch tree ---------- */
.branch-tree{
  background:var(--bg-panel);border-radius:10px;padding:18px 24px;margin-bottom:6px;
}
.tree-row{
  display:flex;align-items:center;gap:0;margin-bottom:4px;position:relative;
}
.node{
  width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:2px solid var(--gray);
  background:var(--gray-dark);
  color:var(--text-dim);
  font-size:13px;font-weight:700;
  flex-shrink:0;cursor:pointer;position:relative;z-index:2;
  transition:transform .1s;
}
.node:hover{transform:scale(1.12);}
.node.owned{border-color:var(--green);background:linear-gradient(145deg,#5c7a2e,#3c521f);color:#eaffc4;}
.node.next{border-color:var(--teal);background:linear-gradient(145deg,#1f8f8f,#146464);color:#e7ffff;box-shadow:0 0 8px rgba(46,198,198,.7);}
.node.locked{border-color:#3a3d34;background:#26281f;color:#565a4c;cursor:not-allowed;}
.connector{height:2px;width:22px;background:var(--gray);flex-shrink:0;}
.connector.owned{background:var(--green);}

.branch-label{
  min-width:150px;font-weight:600;color:var(--text);font-size:13px;margin-right:10px;
}
.branch-label small{display:block;color:var(--text-dim);font-weight:400;font-size:11px;}
.branch-cost{margin-left:14px;color:var(--text-dim);font-size:12px;white-space:nowrap;}

/* multiplier row */
.mult-row{
  display:flex;gap:26px;padding:20px 10px 6px;justify-content:flex-start;
  border-top:1px solid #2c2f26;margin-top:12px;
}
.mult-item{
  display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;
  opacity:.55;transition:opacity .15s, transform .15s;
}
.mult-item:hover{opacity:1;transform:translateY(-2px);}
.mult-item.selected{opacity:1;}
.mult-icon{
  width:56px;height:56px;border-radius:14px;
  background:var(--gray-dark);
  display:flex;align-items:center;justify-content:center;
  font-size:24px;border:2px solid var(--gray);
}
.mult-item.selected .mult-icon{border-color:var(--green-bright);background:linear-gradient(160deg,#5c7a2e,#33430f);box-shadow:0 0 14px rgba(159,232,85,.5);}
.mult-item .mult-label{font-size:12px;color:var(--text-dim);font-weight:600;}
.mult-item.selected .mult-label{color:var(--green-bright);}

/* right-side upgrade sub-lists (per upgrade row of level nodes) */
.upgrade-block{margin-bottom:18px;}
.upgrade-title{font-weight:600;margin-bottom:6px;color:var(--text);font-size:13px;}
.upgrade-title .hint{color:var(--text-dim);font-weight:400;font-size:11px;margin-left:6px;}

/* Peace/War stance box */
.stance-box{
  width:130px;flex-shrink:0;display:flex;flex-direction:column;align-items:center;
  background:var(--bg-panel);border-radius:10px;padding:14px 10px;height:fit-content;
  position:sticky;top:16px;
}
.stance-btn{
  width:100%;text-align:center;padding:14px 0;font-weight:800;letter-spacing:1px;
  border-radius:8px;margin-bottom:6px;background:var(--bg-card);color:var(--text-dim);
  cursor:pointer;font-size:15px;
}
.stance-btn.active{background:var(--green-bright);color:#152009;}
.stance-slider-track{
  width:10px;height:140px;background:#111;border-radius:6px;margin-top:14px;position:relative;
}
.stance-slider-fill{
  position:absolute;bottom:0;left:0;width:100%;background:var(--green-bright);border-radius:6px;
}
.stance-slider-handle{
  position:absolute;left:-4px;width:18px;height:18px;border-radius:50%;
  background:#fff;border:2px solid var(--green-bright);
}

/* Totals footer */
.totals-bar{
  background:#15170f;border-top:1px solid #2c2f26;padding:14px 24px;
  display:flex;gap:24px;flex-wrap:wrap;font-size:13px;
}
.totals-bar .item{color:var(--text-dim);}
.totals-bar .item b{color:var(--green-bright);}
.totals-bar .grand{color:var(--green-bright);font-weight:800;font-size:15px;margin-left:auto;}

.toast{
  position:fixed;bottom:24px;right:24px;background:#222;color:#fff;padding:10px 18px;
  border-radius:8px;opacity:0;transform:translateY(10px);transition:all .25s;pointer-events:none;
  border:1px solid var(--green-dark);z-index:999;
}
.toast.show{opacity:1;transform:translateY(0);}

@media(max-width:900px){
  .panel-wrap{flex-direction:column;}
  .stance-box{width:100%;flex-direction:row;justify-content:space-around;}
  .stance-slider-track{display:none;}
}

.node.challenge-locked{border-color:var(--orange);background:#3a2c17;color:#e0932a;}
.node.no-respect{border-color:var(--danger);}
.node .check{font-weight:900;}
.node-icon-img{width:20px;height:20px;object-fit:contain;}