diff --git a/app/modules/cupang/templates/cupang/box_calc.html b/app/modules/cupang/templates/cupang/box_calc.html
index 7065d6f..133f701 100644
--- a/app/modules/cupang/templates/cupang/box_calc.html
+++ b/app/modules/cupang/templates/cupang/box_calc.html
@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901o" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901p" />{% endblock %}
 
 {% block content %}
 <section class="cpg">
@@ -253,7 +253,13 @@
     var pending = null;                      // 대화상자 대상 {key, centerId}
 
     function prodKey(code) { return "p:" + code; }
-    function mixKey(boxName, idx) { return "m:" + boxName + "#" + idx; }
+    // 혼합 상자 키는 위치가 아니라 상자마다 붙는 고유 id 로 잡는다.
+    // (상자를 새로 만들거나 지워도 이미 담긴 배분이 어긋나지 않게)
+    var mixSeq = 0;
+    function mixKeyFor(b) {
+      if (!b.uid) { mixSeq += 1; b.uid = "b" + mixSeq; }
+      return "m:" + b.uid;
+    }
 
     // 자투리 혼합 상자에 쓸 상자 종류 — 요약 카드에서 고른다(표시용).
     var MIX_TYPES = ["쿠팡상자", "3호상자", "6호상자"];
@@ -332,7 +338,7 @@
           mixOwner = {};
           calc.mixes.forEach(function (m) {
             m.boxes.forEach(function (b, i) {
-              var k = mixKey(m.box_name, i);
+              var k = mixKeyFor(b);
               var n = 0;
               b.items.forEach(function (it) { n += it.quantity; });
               units[k] = n;
@@ -345,6 +351,7 @@
           var had = Object.keys(alloc).some(function (k) { return alloc[k].length; });
           alloc = {};
           stamped = {};
+          pool = {};
           allStamped = false;   // 계산이 바뀌면 이전 배분은 근거가 사라지므로 비운다.
           var skipped = restore ? applyRestore(restore) : 0;
           render();
@@ -426,7 +433,7 @@
         units: units, labels: labels, contents: contents,
         openCenters: openCenters.slice(), alloc: alloc, methods: methods,
         stamped: stamped, allStamped: allStamped,
-        mixType: mixType, mixOwner: mixOwner
+        mixType: mixType, mixOwner: mixOwner, pool: pool
       };
     }
 
@@ -443,6 +450,7 @@
       alloc = st.alloc; methods = st.methods;
       stamped = st.stamped; allStamped = st.allStamped;
       mixType = st.mixType || {}; mixOwner = st.mixOwner || {};
+      pool = st.pool || {};
 
       tbody.innerHTML = "";
       (st.items || []).forEach(function (it) { addRow(it.product_code, it.quantity); });
@@ -474,7 +482,7 @@
         units: {}, labels: {}, contents: {},
         openCenters: [], alloc: {}, methods: {},
         stamped: {}, allStamped: false,
-        mixType: {}, mixOwner: {}
+        mixType: {}, mixOwner: {}, pool: {}
       };
 
       function put(cid, key, count) {
@@ -512,7 +520,7 @@
           mx.boxes.forEach(function (b) {
             var idx = bucket.boxes.length;
             bucket.boxes.push(b);
-            var k = mixKey(mx.box_name, idx);
+            var k = mixKeyFor(b);
             st.mixOwner[k] = g.center_name;
             put(cid, k, 1);
           });
@@ -530,7 +538,7 @@
         m.boxes.forEach(function (b, i) {
           var n = 0;
           b.items.forEach(function (it) { n += it.quantity; });
-          var k = mixKey(m.box_name, i);
+          var k = mixKeyFor(b);
           st.units[k] = n;
           st.mixType[k] = MIX_TYPES[0];
           st.labels[k] = st.mixType[k] + " 혼합 #" + (i + 1) +
@@ -680,6 +688,161 @@
       return n;
     }
 
+    // ── 혼합 상자 편집 ────────────────────────────────
+    //  상자 용량은 부피 합으로 본다: 제품 1개 = 1/입수량 상자.
+    //  빼낸 수량은 센터별 "미배치 자투리" 풀에 남고, 거기서 다시 담는다.
+    var pool = {};   // centerId -> [{product_code, product_name, quantity}]
+
+    function upbOf(code) {
+      var hit = calc.results.filter(function (r) { return r.product_code === code; })[0];
+      return hit ? (hit.units_per_box || 0) : 0;
+    }
+
+    function mixRef(key) {
+      var found = null;
+      calc.mixes.forEach(function (m) {
+        m.boxes.forEach(function (b) { if (mixKeyFor(b) === key) found = { m: m, b: b }; });
+      });
+      return found;
+    }
+
+    function mixFill(key) {
+      var vol = 0;
+      (contents[key] || []).forEach(function (it) {
+        var u = upbOf(it.product_code);
+        if (u) vol += it.quantity / u;
+      });
+      return vol;
+    }
+
+    function mixRoomFor(key, code) {
+      var u = upbOf(code);
+      if (!u) return 0;
+      return Math.max(0, Math.floor((1 - mixFill(key)) * u + 1e-9));
+    }
+
+    // 내용물이 바뀐 상자를 ②(요약) 쪽 데이터와 맞춘다. 비면 상자를 없앤다.
+    function syncMix(key) {
+      var list = (contents[key] || []).filter(function (it) { return it.quantity > 0; });
+      contents[key] = list;
+      var ref = mixRef(key);
+      if (!list.length) {
+        if (ref) {
+          var idx = ref.m.boxes.indexOf(ref.b);
+          if (idx >= 0) ref.m.boxes.splice(idx, 1);
+          if (!ref.m.boxes.length) {
+            calc.mixes = calc.mixes.filter(function (m) { return m !== ref.m; });
+          }
+        }
+        Object.keys(alloc).forEach(function (cid) {
+          alloc[cid] = (alloc[cid] || []).filter(function (a) { return a.key !== key; });
+        });
+        delete units[key]; delete labels[key]; delete contents[key];
+        delete mixType[key]; delete mixOwner[key]; delete stamped[key];
+        return;
+      }
+      var total = 0;
+      list.forEach(function (it) { total += it.quantity; });
+      units[key] = total;
+      if (ref) {
+        ref.b.items = list.map(function (it) {
+          return { product_code: it.product_code, product_name: it.product_name, quantity: it.quantity };
+        });
+        ref.b.fill_percent = Math.round(mixFill(key) * 1000) / 10;
+      }
+    }
+
+    function centerOfKey(key) {
+      var hit = "";
+      Object.keys(alloc).forEach(function (cid) {
+        (alloc[cid] || []).forEach(function (a) { if (a.key === key) hit = String(cid); });
+      });
+      return hit;
+    }
+
+    function mixKeysOf(cid) {
+      return (alloc[String(cid)] || [])
+        .filter(function (a) { return a.key.indexOf("m:") === 0; })
+        .map(function (a) { return a.key; });
+    }
+
+    function poolOf(cid) {
+      cid = String(cid);
+      if (!pool[cid]) pool[cid] = [];
+      return pool[cid];
+    }
+
+    function poolAdd(cid, code, name, qty) {
+      if (qty <= 0) return;
+      var list = poolOf(cid);
+      var hit = list.filter(function (it) { return it.product_code === code; })[0];
+      if (hit) { hit.quantity += qty; return; }
+      list.push({ product_code: code, product_name: name, quantity: qty });
+    }
+
+    function poolTake(cid, code, qty) {
+      var list = poolOf(cid);
+      var hit = list.filter(function (it) { return it.product_code === code; })[0];
+      if (!hit) return 0;
+      var take = Math.min(hit.quantity, qty);
+      hit.quantity -= take;
+      pool[String(cid)] = list.filter(function (it) { return it.quantity > 0; });
+      return take;
+    }
+
+    function poolTotal(cid) {
+      var n = 0;
+      poolOf(cid).forEach(function (it) { n += it.quantity; });
+      return n;
+    }
+
+    function mixItem(key, code) {
+      return (contents[key] || []).filter(function (it) { return it.product_code === code; })[0];
+    }
+
+    // 상자에 담기 — 용량만큼만 들어간다. 담은 수량을 돌려준다.
+    function mixPut(key, code, name, qty) {
+      var room = mixRoomFor(key, code);
+      var put = Math.min(room, qty);
+      if (put <= 0) return 0;
+      var hit = mixItem(key, code);
+      if (hit) { hit.quantity += put; }
+      else { (contents[key] = contents[key] || []).push({ product_code: code, product_name: name, quantity: put }); }
+      syncMix(key);
+      return put;
+    }
+
+    // 상자에서 빼기 — 뺀 수량은 그 센터의 미배치 풀로.
+    function mixTake(key, code, qty) {
+      var hit = mixItem(key, code);
+      if (!hit) return 0;
+      var take = Math.min(hit.quantity, qty);
+      if (take <= 0) return 0;
+      var cid = centerOfKey(key);
+      hit.quantity -= take;
+      syncMix(key);
+      if (cid) poolAdd(cid, code, hit.product_name, take);
+      return take;
+    }
+
+    // 새 혼합 상자 (같은 센터, 비어 있는 상태로 추가)
+    function newMixBox(cid, boxName) {
+      var name = boxName || (calc.mixes[0] && calc.mixes[0].box_name) || MIX_TYPES[0];
+      var bucket = calc.mixes.filter(function (m) { return m.box_name === name; })[0];
+      if (!bucket) { bucket = { box_name: name, boxes: [] }; calc.mixes.push(bucket); }
+      var b = { items: [], fill_percent: 0 };
+      bucket.boxes.push(b);
+      var key = mixKeyFor(b);
+      contents[key] = [];
+      units[key] = 0;
+      mixType[key] = MIX_TYPES[0];
+      mixOwner[key] = centerName(cid);
+      labels[key] = mixLabel(key, bucket.boxes.length - 1);
+      seq += 1;
+      (alloc[String(cid)] = alloc[String(cid)] || []).push({ id: seq, key: key, count: 1 });
+      return key;
+    }
+
     // ── ② 요약 렌더 ───────────────────────────────────
     function boxSvg(fill, label) {
       var f = Math.max(0, Math.min(100, fill || 0));
@@ -731,7 +894,7 @@
       calc.mixes.forEach(function (m) {
         m.boxes.forEach(function (b, i) {
           totalMix += 1;
-          remainMix += remainFor(mixKey(m.box_name, i));
+          remainMix += remainFor(mixKeyFor(b));
         });
       });
       var assigned = (totalProd + totalMix) - (remainProd + remainMix);
@@ -783,7 +946,7 @@
         var bh = "", n = 0;
         calc.mixes.forEach(function (m) {
           m.boxes.forEach(function (b, i) {
-            var key = mixKey(m.box_name, i);
+            var key = mixKeyFor(b);
             var remain = remainFor(key);
             if (remain) delete stamped[key];
             var items = b.items.map(function (it) {
@@ -809,18 +972,79 @@
       }
     }
 
-    // 혼합 상자는 안에 무엇이 몇 개 들어가는지 트리로 펼쳐 보여준다.
+    // 혼합 상자는 안에 무엇이 몇 개 들어가는지 트리로 펼치고, 그 자리에서
+    // 수량 조절(− +)과 다른 상자로 이동(⇄)을 할 수 있게 한다.
+    function moveOptions(fromKey, cid, code) {
+      var opts = '<option value="">이동…</option>';
+      mixKeysOf(cid).forEach(function (k) {
+        if (k === fromKey) return;
+        var room = mixRoomFor(k, code);
+        opts += '<option value="' + esc(k) + '"' + (room ? "" : " disabled") + ">" +
+                esc(labels[k] || k) + (room ? " (여유 " + room + "개)" : " (가득)") + "</option>";
+      });
+      opts += '<option value="__new__">+ 새 상자로</option>';
+      opts += '<option value="__pool__">미배치로 빼기</option>';
+      return opts;
+    }
+
     function treeHtml(entry) {
       var list = contents[entry.key];
       if (!list || !list.length) return "";
+      var editable = entry.key.indexOf("m:") === 0 && entry.count === 1;
+      var cid = editable ? centerOfKey(entry.key) : "";
       return '<ul class="cpg-dist-tree">' + list.map(function (it) {
+        var qty = it.quantity * entry.count;
+        if (!editable) {
+          return '<li><span class="cpg-tree-name">' + esc(it.product_name) + "</span>" +
+                 '<span class="cpg-tree-qty">' + qty + "개</span>" +
+                 (entry.count > 1 ? '<span class="cpg-tree-per">(' + it.quantity + "개 × " + entry.count + "상자)</span>" : "") +
+                 "</li>";
+        }
+        var canAdd = mixRoomFor(entry.key, it.product_code) > 0;
         return '<li><span class="cpg-tree-name">' + esc(it.product_name) + "</span>" +
-               '<span class="cpg-tree-qty">' + (it.quantity * entry.count) + "개</span>" +
-               (entry.count > 1 ? '<span class="cpg-tree-per">(' + it.quantity + "개 × " + entry.count + "상자)</span>" : "") +
-               "</li>";
+               '<span class="cpg-mix-ctl">' +
+                 '<button type="button" class="cpg-mix-step" data-mix-dec data-key="' + esc(entry.key) +
+                   '" data-code="' + esc(it.product_code) + '" title="1개 빼기">−</button>' +
+                 '<span class="cpg-tree-qty">' + qty + "개</span>" +
+                 '<button type="button" class="cpg-mix-step" data-mix-inc data-key="' + esc(entry.key) +
+                   '" data-code="' + esc(it.product_code) + '"' + (canAdd ? "" : " disabled") +
+                   ' title="미배치에서 1개 담기">+</button>' +
+                 '<select class="erp-select cpg-mix-move" data-key="' + esc(entry.key) +
+                   '" data-code="' + esc(it.product_code) + '" aria-label="이동">' +
+                   moveOptions(entry.key, cid, it.product_code) +
+                 "</select>" +
+               "</span></li>";
       }).join("") + "</ul>";
     }
 
+    // 센터별 미배치 자투리 — 상자에서 뺀 수량이 여기 모인다.
+    function poolHtml(cid) {
+      var list = poolOf(cid);
+      if (!list.length) return "";
+      var rows = list.map(function (it) {
+        var opts = '<option value="">담을 상자…</option>';
+        mixKeysOf(cid).forEach(function (k) {
+          var room = mixRoomFor(k, it.product_code);
+          opts += '<option value="' + esc(k) + '"' + (room ? "" : " disabled") + ">" +
+                  esc(labels[k] || k) + (room ? " (여유 " + room + "개)" : " (가득)") + "</option>";
+        });
+        opts += '<option value="__new__">+ 새 상자에</option>';
+        return '<li><span class="cpg-tree-name">' + esc(it.product_name) + "</span>" +
+               '<span class="cpg-mix-ctl">' +
+                 '<span class="cpg-tree-qty">' + it.quantity + "개</span>" +
+                 '<select class="erp-select cpg-pool-move" data-center="' + esc(cid) +
+                   '" data-code="' + esc(it.product_code) + '" aria-label="담을 상자">' + opts + "</select>" +
+               "</span></li>";
+      }).join("");
+      return '<div class="cpg-pool">' +
+               '<div class="cpg-pool-head">미배치 자투리 <b>' + poolTotal(cid) + "개</b>" +
+                 '<button type="button" class="erp-btn erp-btn-outline cpg-pool-auto" data-center="' + esc(cid) +
+                   '">자동 담기</button>' +
+               "</div>" +
+               '<ul class="cpg-dist-tree">' + rows + "</ul>" +
+             "</div>";
+    }
+
     // ── ③ 센터 분배 렌더 ──────────────────────────────
     function renderDist() {
       if (!distList) return;
@@ -834,9 +1058,12 @@
           var per = units[a.key] || 0;
           boxes += a.count;
           pieces += a.count * per;
-          items += '<li class="cpg-dist-item" data-entry="' + a.id + '">' +
+          var isMix = a.key.indexOf("m:") === 0;
+          var fillTxt = isMix ? Math.round(mixFill(a.key) * 100) + "% 채움" : "";
+          items += '<li class="cpg-dist-item' + (isMix ? " is-mix" : "") + '" data-entry="' + a.id + '">' +
                      '<div class="cpg-dist-line">' +
-                       '<span class="cpg-dist-name">' + esc(labels[a.key] || a.key) + "</span>" +
+                       '<span class="cpg-dist-name">' + esc(labels[a.key] || a.key) +
+                         (fillTxt ? ' <em class="cpg-mix-fill">' + fillTxt + "</em>" : "") + "</span>" +
                        '<input class="erp-input cpg-dist-qty" type="number" min="1" max="999" step="1" inputmode="numeric" value="' + a.count + '" />' +
                        '<span class="cpg-dist-unit">상자 · ' + (a.count * per) + "개</span>" +
                        '<button type="button" class="erp-btn erp-btn-danger cpg-dist-del" title="빼기" aria-label="빼기">✕</button>' +
@@ -863,6 +1090,13 @@
                   (rows.length
                     ? '<ul class="cpg-dist-items">' + items + "</ul>"
                     : '<p class="cpg-dist-hint">여기로 상자를 끌어다 놓기</p>') +
+                  poolHtml(cid) +
+                  (rows.length
+                    ? '<div class="cpg-dist-foot">' +
+                        '<button type="button" class="erp-btn erp-btn-outline cpg-mix-new" data-center="' +
+                          esc(cid) + '">+ 새 혼합 상자</button>' +
+                      "</div>"
+                    : "") +
                 "</div>";
       });
       distList.innerHTML = html;
@@ -1049,7 +1283,7 @@
       mixType[key] = sel.value;
       calc.mixes.forEach(function (m) {
         m.boxes.forEach(function (b, i) {
-          var k = mixKey(m.box_name, i);
+          var k = mixKeyFor(b);
           if (k === key) labels[k] = mixLabel(k, i);
         });
       });
@@ -1057,6 +1291,137 @@
       msg.textContent = "상자 종류를 " + sel.value + " 로 바꿨습니다.";
     });
 
+    // ── 혼합 상자 내용물 편집 이벤트 ──────────────────
+    if (distList) {
+      distList.addEventListener("click", function (e) {
+        var dec = e.target.closest("[data-mix-dec]");
+        if (dec) {
+          var moved = mixTake(dec.getAttribute("data-key"), dec.getAttribute("data-code"), 1);
+          if (moved) { render(); msg.textContent = "1개를 미배치로 뺐습니다."; }
+          return;
+        }
+        var inc = e.target.closest("[data-mix-inc]");
+        if (inc) {
+          var key = inc.getAttribute("data-key");
+          var code = inc.getAttribute("data-code");
+          var cid = centerOfKey(key);
+          var got = poolTake(cid, code, Math.min(1, mixRoomFor(key, code)));
+          if (!got) {
+            msg.textContent = mixRoomFor(key, code)
+              ? "미배치 자투리에 남은 수량이 없습니다."
+              : "이 상자에 더 들어갈 자리가 없습니다.";
+            return;
+          }
+          var name = (mixItem(key, code) || {}).product_name || code;
+          mixPut(key, code, name, got);
+          render();
+          msg.textContent = "1개를 담았습니다.";
+          return;
+        }
+        // 혼합 상자의 ✕ — 내용물을 미배치로 옮기고 상자를 없앤다.
+        var del = e.target.closest(".cpg-dist-del");
+        if (del) {
+          var li = del.closest(".cpg-dist-item");
+          var zone = del.closest("[data-drop-for]");
+          var dcid = zone && zone.getAttribute("data-drop-for");
+          var entry = (alloc[dcid] || []).filter(function (a) {
+            return String(a.id) === li.getAttribute("data-entry");
+          })[0];
+          if (entry && entry.key.indexOf("m:") === 0) {
+            e.stopImmediatePropagation();     // 뒤 핸들러가 또 지우지 않게
+            (contents[entry.key] || []).slice().forEach(function (it) {
+              poolAdd(dcid, it.product_code, it.product_name, it.quantity);
+            });
+            contents[entry.key] = [];
+            syncMix(entry.key);
+            render();
+            msg.textContent = "혼합 상자를 비우고 미배치로 옮겼습니다.";
+          }
+          return;
+        }
+
+        var neu = e.target.closest(".cpg-mix-new");
+        if (neu) {
+          newMixBox(neu.getAttribute("data-center"));
+          render();
+          msg.textContent = "빈 혼합 상자를 추가했습니다.";
+          return;
+        }
+        var auto = e.target.closest(".cpg-pool-auto");
+        if (auto) {
+          var acid = auto.getAttribute("data-center");
+          var left = 0;
+          poolOf(acid).slice().forEach(function (it) {
+            var need = it.quantity;
+            mixKeysOf(acid).forEach(function (k) {
+              if (need <= 0) return;
+              var put = mixPut(k, it.product_code, it.product_name, Math.min(need, mixRoomFor(k, it.product_code)));
+              if (put) { poolTake(acid, it.product_code, put); need -= put; }
+            });
+            if (need > 0) {
+              var nk = newMixBox(acid);
+              var put2 = mixPut(nk, it.product_code, it.product_name, Math.min(need, mixRoomFor(nk, it.product_code)));
+              if (put2) { poolTake(acid, it.product_code, put2); need -= put2; }
+            }
+            left += Math.max(need, 0);
+          });
+          render();
+          msg.textContent = left ? "일부는 담지 못했습니다 (" + left + "개)" : "미배치 자투리를 모두 담았습니다.";
+        }
+      });
+
+      distList.addEventListener("change", function (e) {
+        var mv = e.target.closest(".cpg-mix-move");
+        if (mv) {
+          var fromKey = mv.getAttribute("data-key");
+          var code = mv.getAttribute("data-code");
+          var target = mv.value;
+          mv.value = "";
+          if (!target) return;
+          var src = mixItem(fromKey, code);
+          if (!src) return;
+          var qty = src.quantity;
+          var name = src.product_name;
+          var cid = centerOfKey(fromKey);
+          if (target === "__pool__") {
+            mixTake(fromKey, code, qty);
+            render();
+            msg.textContent = name + " " + qty + "개를 미배치로 뺐습니다.";
+            return;
+          }
+          var toKey = target === "__new__" ? newMixBox(cid) : target;
+          var room = mixRoomFor(toKey, code);
+          var move = Math.min(qty, room);
+          if (move <= 0) { msg.textContent = "옮길 자리가 없습니다."; render(); return; }
+          mixTake(fromKey, code, move);        // 일단 미배치로
+          poolTake(cid, code, move);           // 바로 꺼내서
+          mixPut(toKey, code, name, move);     // 대상 상자에 담기
+          render();
+          msg.textContent = name + " " + move + "개를 " + (labels[toKey] || "새 상자") + " 로 옮겼습니다." +
+                            (move < qty ? " (자리가 부족해 " + (qty - move) + "개는 남음)" : "");
+          return;
+        }
+
+        var pm = e.target.closest(".cpg-pool-move");
+        if (pm) {
+          var pcid = pm.getAttribute("data-center");
+          var pcode = pm.getAttribute("data-code");
+          var dest = pm.value;
+          pm.value = "";
+          if (!dest) return;
+          var entry = poolOf(pcid).filter(function (it) { return it.product_code === pcode; })[0];
+          if (!entry) return;
+          var key2 = dest === "__new__" ? newMixBox(pcid) : dest;
+          var put = Math.min(entry.quantity, mixRoomFor(key2, pcode));
+          if (put <= 0) { msg.textContent = "그 상자에는 자리가 없습니다."; render(); return; }
+          poolTake(pcid, pcode, put);
+          mixPut(key2, pcode, entry.product_name, put);
+          render();
+          msg.textContent = entry.product_name + " " + put + "개를 담았습니다.";
+        }
+      });
+    }
+
     if (distList) {
       distList.addEventListener("input", function (e) {
         if (!e.target.classList.contains("cpg-dist-qty")) return;
@@ -1189,7 +1554,7 @@
       calc.mixes.forEach(function (m) {
         m.boxes.forEach(function (b, i) {
           total += 1;
-          remain += remainFor(mixKey(m.box_name, i));
+          remain += remainFor(mixKeyFor(b));
         });
       });
       return { total: total, remain: remain };
@@ -1208,6 +1573,9 @@
       if (!cids.length) return "센터에 담긴 상자가 없습니다.";
       var missing = cids.filter(function (cid) { return !methods[String(cid)]; });
       if (missing.length) return "출고방식 미선택: " + missing.map(centerName).join(", ");
+      var leftover = 0;
+      openCenters.forEach(function (cid) { leftover += poolTotal(cid); });
+      if (leftover) return "미배치 자투리 " + leftover + "개가 남았습니다.";
       return "";
     }
 
@@ -1478,7 +1846,7 @@
         });
         calc.mixes.forEach(function (m) {
           m.boxes.forEach(function (b, i) {
-            var k = mixKey(m.box_name, i);
+            var k = mixKeyFor(b);
             labels[k] = mixLabel(k, i);
           });
         });
diff --git a/app/modules/cupang/templates/cupang/box_rules.html b/app/modules/cupang/templates/cupang/box_rules.html
index ecb7fc1..bd52dc9 100644
--- a/app/modules/cupang/templates/cupang/box_rules.html
+++ b/app/modules/cupang/templates/cupang/box_rules.html
@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901o" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901p" />{% endblock %}
 
 {% block content %}
 <section class="cpg">
diff --git a/app/modules/cupang/templates/cupang/centers.html b/app/modules/cupang/templates/cupang/centers.html
index d83136a..154cba6 100644
--- a/app/modules/cupang/templates/cupang/centers.html
+++ b/app/modules/cupang/templates/cupang/centers.html
@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901o" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901p" />{% endblock %}
 
 {% block content %}
 <section class="cpg">
diff --git a/app/modules/cupang/templates/cupang/index.html b/app/modules/cupang/templates/cupang/index.html
index afa421d..40375aa 100644
--- a/app/modules/cupang/templates/cupang/index.html
+++ b/app/modules/cupang/templates/cupang/index.html
@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901o" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901p" />{% endblock %}
 
 {% block content %}
 <section class="cpg">
diff --git a/app/modules/cupang/templates/cupang/products.html b/app/modules/cupang/templates/cupang/products.html
index 599eb61..a4a9435 100644
--- a/app/modules/cupang/templates/cupang/products.html
+++ b/app/modules/cupang/templates/cupang/products.html
@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901o" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901p" />{% endblock %}
 
 {% block content %}
 <section class="cpg">
diff --git a/app/modules/cupang/templates/cupang/view.html b/app/modules/cupang/templates/cupang/view.html
index 16fb03e..bbb38d5 100644
--- a/app/modules/cupang/templates/cupang/view.html
+++ b/app/modules/cupang/templates/cupang/view.html
@@ -1,6 +1,6 @@
 {% extends "erp_base.html" %}
 
-{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901o" />{% endblock %}
+{% block head_extra %}<link rel="stylesheet" href="/static/cupang.css?v=20260901p" />{% endblock %}
 
 {% block content %}
 {# 출고 묶음 보기 — 상자 계산 화면과 같은 3열 구성. 읽기 전용(수정 없음). #}
diff --git a/app/static/cupang.css b/app/static/cupang.css
index 46f1ced..499a582 100644
--- a/app/static/cupang.css
+++ b/app/static/cupang.css
@@ -1422,3 +1422,37 @@ body.cpg-dragging { cursor: grabbing; user-select: none; }
 .cpg-list .cpg-ship-meta { padding: 0 10px 8px; font-size: 11px; }
 /* 혼합 상자 줄은 굵게 — 어떤 상자인지 바로 보이게 */
 .cpg-dist-item.is-mix .cpg-dist-name { font-weight: 600; }
+
+/* ── ③ 혼합 상자 내용물 편집 (수량 스테퍼 / 이동 / 미배치 풀) ── */
+.cpg-mix-fill { font-style: normal; font-size: 11px; color: var(--color-midtone-gray); }
+.cpg-mix-ctl { display: inline-flex; align-items: center; gap: 4px; flex: 0 0 auto; }
+.cpg-mix-step {
+  width: 20px; height: 20px; line-height: 1;
+  display: inline-flex; align-items: center; justify-content: center;
+  border: 1px solid var(--color-subtle-ash); border-radius: 6px;
+  background: #fff; cursor: pointer; font-size: 13px; padding: 0;
+}
+.cpg-mix-step:hover:not(:disabled) { background: var(--color-ghost-gray); border-color: var(--color-midtone-gray); }
+.cpg-mix-step:disabled { opacity: .35; cursor: not-allowed; }
+.cpg-mix-move, .cpg-pool-move {
+  width: auto; min-width: 74px; max-width: 132px;
+  padding: 1px 4px; font-size: 11px; line-height: 1.5; cursor: pointer;
+}
+.cpg-dist-tree .cpg-tree-qty { min-width: 38px; text-align: right; }
+
+.cpg-pool {
+  margin: 6px 10px 8px;
+  padding: 8px 10px;
+  border: 1px dashed var(--color-midtone-gray); border-radius: 10px;
+  background: var(--color-ghost-gray);
+}
+.cpg-pool-head {
+  display: flex; align-items: center; gap: 8px;
+  font-size: 12px; font-weight: 600; margin-bottom: 4px;
+}
+.cpg-pool-head > b { font-family: var(--font-geist-mono); }
+.cpg-pool-auto { margin-left: auto; padding: 2px 8px; font-size: 11px; line-height: 1.5; }
+.cpg-pool .cpg-dist-tree { border-left: 0; padding-left: 0; }
+.cpg-pool .cpg-dist-tree li::before { content: ""; }
+.cpg-dist-foot { padding: 0 10px 10px; }
+.cpg-mix-new { padding: 3px 10px; font-size: 12px; line-height: 1.5; }