/* Box Packing Optimizer: desktop workbench, Apple-style (system font, translucent toolbar, grouped lists).
   Layout: fixed side columns, fluid main columns; at >= 1800px each screen shows an extra panel. */
:root{
  --bg:#f5f5f7;--surface:#fff;--sidebar:#ececef;
  --ink:#1d1d1f;--ink-2:#6e6e73;--ink-3:#8e8e93;
  --fill:rgba(118,118,128,.12);--fill-2:rgba(118,118,128,.1);
  --sep:rgba(60,60,67,.18);--sep-2:rgba(60,60,67,.12);
  --accent:#0071e3;--accent-ink:#0066cc;--accent-soft:rgba(0,113,227,.1);
  --ok:#34c759;--ok-ink:#1a7f37;--ok-soft:#e7f6ec;
  --warn:#ff9500;--warn-ink:#b25000;--warn-soft:#fff1e0;
  --err:#ff3b30;--err-ink:#d70015;--err-soft:#ffe9ec;
  --na:#c7c7cc;
  --shadow-1:0 1px 2px rgba(0,0,0,.04);
  --shadow-2:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.04);
  --shadow-3:0 1px 2px rgba(0,0,0,.04),0 8px 24px rgba(0,0,0,.05);
  --material:rgba(255,255,255,.72);
  --toolbar-h:52px;
  --font:-apple-system,BlinkMacSystemFont,'SF Pro Text','Segoe UI Variable Text','Segoe UI',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--font);font-size:14px;line-height:1.35;color:var(--ink);background:var(--bg);
  font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased;display:flex;flex-direction:column;min-width:1024px}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--accent-ink);text-decoration:none}
a:hover{color:#004f9e}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--ink-2)}
.small{font-size:12px}
.strong{font-weight:500;color:var(--ink)}
.spacer{flex:1 1 auto}
:focus-visible{outline:3px solid rgba(0,113,227,.45);outline-offset:2px}

/* ---------- Toolbar ---------- */
.toolbar{position:sticky;top:0;z-index:20;height:var(--toolbar-h);flex-shrink:0;padding:0 20px;
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:center;
  background:var(--material);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);
  box-shadow:0 1px 0 rgba(0,0,0,.06)}
.brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;letter-spacing:-.01em}
.privacy{justify-self:end;display:flex;align-items:center;gap:6px;font-size:12px;color:var(--ink-2)}
.tabs{justify-self:center}
.tab-status{display:inline-flex;align-items:center;margin-left:8px}
.tab-status:empty{display:none}

/* ---------- Segmented control ---------- */
.segmented{display:inline-flex;gap:2px;padding:2px;border-radius:9px;background:var(--fill)}
.segmented>button,.segmented label>span{height:28px;padding:0 14px;border:0;border-radius:7px;background:transparent;
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;white-space:nowrap;
  transition:background-color .15s ease,box-shadow .15s ease}
.segmented.small>button,.segmented.small label>span{font-size:12px;padding:0 12px}
.segmented>button[aria-selected=true],.segmented>button[aria-pressed=true],.segmented input:checked+span{
  background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.1),0 0 0 .5px rgba(0,0,0,.04)}
.segmented label{position:relative;display:inline-flex;cursor:pointer}
.segmented input{position:absolute;opacity:0;inset:0;cursor:pointer}
.segmented input:focus-visible+span{outline:3px solid rgba(0,113,227,.45);outline-offset:1px}
.segmented input:disabled+span{opacity:.4;cursor:default}
.segmented .count{color:var(--ink-2);font-weight:400}

/* ---------- Buttons ---------- */
.btn{height:36px;padding:0 16px;border:0;border-radius:18px;display:inline-flex;align-items:center;justify-content:center;gap:6px;
  font-size:14px;font-weight:500;white-space:nowrap;transition:transform 100ms ease-out,background-color .15s ease,opacity .15s ease}
.btn:active:not(:disabled),.link-btn:active,.icon-btn:active,.segmented>button:active{transform:scale(.97)}
.btn-primary{background:var(--accent);color:#fff;font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.1)}
.btn-primary:hover:not(:disabled){background:#0077ed}
.btn-primary:disabled{background:rgba(0,113,227,.3);box-shadow:none;cursor:default}
.btn-plain{background:var(--fill);color:var(--accent-ink)}
.btn-plain:hover:not(:disabled){background:rgba(118,118,128,.18)}
.btn-plain:disabled{color:var(--ink-3);cursor:default}
.btn-large{height:46px;border-radius:23px;font-size:15px;letter-spacing:-.01em}
.btn kbd{font:inherit;font-size:12px;font-weight:500;opacity:.75}
.link-btn{align-self:flex-start;height:32px;padding:0 4px;border:0;background:none;color:var(--accent);
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;transition:transform 100ms ease-out}
.link-btn:disabled{color:var(--ink-3);cursor:default}
.icon-btn{width:32px;height:32px;border:0;border-radius:8px;background:transparent;display:inline-flex;align-items:center;justify-content:center;transition:transform 100ms ease-out}
.icon-btn:hover{background:var(--fill)}
.text-link{font-size:15px;font-weight:500}

/* ---------- Typography ---------- */
.title-large{font-size:34px;font-weight:700;line-height:1.1;letter-spacing:-.03em}
.title-small{font-size:17px;font-weight:600;letter-spacing:-.02em}
.eyebrow{font-size:13px;font-weight:500;color:var(--ink-2)}
.hero-num{font-size:40px;font-weight:600;line-height:1.05;letter-spacing:-.03em}
.hero-num .unit{font-size:20px;font-weight:500;letter-spacing:-.01em;color:var(--ink-2)}
.num-l{font-size:28px;font-weight:600;line-height:1.1;letter-spacing:-.02em}
.unit{font-size:15px;font-weight:500;letter-spacing:0;color:var(--ink-2)}

/* ---------- Groups, cards, fields ---------- */
.group{display:flex;flex-direction:column;gap:8px}
.group-head{display:flex;align-items:baseline;justify-content:space-between;padding:0 4px}
.group-title{font-size:13px;font-weight:600;color:var(--ink-2);padding-left:4px}
.group-head .group-title{padding-left:0}
.group-meta,.group-note{font-size:12px;color:var(--ink-2)}
.group-note{padding-left:4px;line-height:1.4}
.group-box{background:var(--surface);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-1)}
.group-box.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.card{background:var(--surface);border-radius:16px;box-shadow:var(--shadow-2)}
.field{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--ink-2)}
.input-unit{position:relative;display:block}
.input-unit>span{position:absolute;right:10px;top:50%;transform:translateY(-50%);font-size:12px;color:var(--ink-3);pointer-events:none}
input[type=number],input[type=text],select{height:36px;width:100%;min-width:0;padding:0 10px;border:0;border-radius:8px;background:var(--fill-2);
  font-size:15px;color:var(--ink);transition:box-shadow .15s ease,background-color .15s ease}
.input-unit input{padding-right:36px}
input:focus,select:focus{outline:none;background:#fff;box-shadow:0 0 0 3px rgba(0,113,227,.35)}
input[aria-invalid=true]{background:#fff;box-shadow:0 0 0 2px var(--err)}
input[aria-invalid=true]:focus{box-shadow:0 0 0 2px var(--err),0 0 0 5px rgba(255,59,48,.25)}
.field-err{grid-column:1/-1;display:flex;align-items:center;gap:6px;font-size:12px;line-height:1.35;color:var(--err-ink)}
.field-err::before{content:"!";flex:0 0 14px;height:14px;border-radius:50%;background:currentColor;color:#fff;font-size:10px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;-webkit-text-fill-color:#fff}
.box-foot{display:flex;justify-content:space-between;padding-top:10px;box-shadow:0 -.5px 0 var(--sep);font-size:13px;color:var(--ink-2)}
.batch-only{display:none}
.batch-settings .batch-only{display:block}

/* Grouped list (settings) */
.group-box.list{padding:0;gap:0;overflow:hidden}
.list-row{min-height:46px;padding:6px 12px 6px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink)}
.list-row+.list-row,.list-err+.list-row{box-shadow:inset 16px 0 0 var(--surface),inset 0 .5px 0 var(--sep)}
.list-err{padding:0 16px 10px}
.input-unit.narrow{width:110px}
.input-unit.narrow input{height:32px;text-align:right;padding-right:30px}
.input-unit.narrow.vol{width:132px}
.input-unit.narrow.vol input{padding-right:40px}

/* Chips and pills */
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{padding:3px 10px;border-radius:999px;background:var(--fill);font-size:12px;font-weight:500;color:var(--ink)}
.pill{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;font-size:14px;font-weight:600;white-space:nowrap}
.pill.small{padding:3px 10px;font-size:13px}
.pill-ok{background:var(--ok-soft);color:var(--ok-ink)}
.pill-large{background:var(--warn-soft);color:var(--warn-ink)}
.pill-small,.pill-error{background:var(--err-soft);color:var(--err-ink)}
.pill-empty,.pill-pending{background:var(--fill);color:var(--ink-2)}

/* Status marks: shape AND colour, so they can be told apart without colour */
.mark{display:inline-block;flex:0 0 auto;width:8px;height:8px}
.mark-ok{border-radius:50%;background:var(--ok)}
.mark-large{border-radius:2px;background:var(--warn)}
.mark-small,.mark-error{width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:8px solid var(--err)}
.mark-empty{border-radius:50%;background:var(--na)}
.mark-pending{border-radius:50%;box-shadow:inset 0 0 0 1.5px var(--na)}
.status{display:inline-flex;align-items:center;gap:6px;font-weight:500;white-space:nowrap}
.status-ok{color:var(--ok-ink)}
.status-large{color:var(--warn-ink)}
.status-small,.status-error{color:var(--err-ink)}
.status-empty,.status-pending{color:var(--ink-2)}
.note-dot{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;margin-left:8px;border-radius:50%;
  background:var(--warn);color:#fff;font-size:11px;font-weight:700;vertical-align:-3px;cursor:help}

/* ---------- Panels ---------- */
.panels{flex:1 1 auto;min-height:0;display:flex;flex-direction:column}
.panel{flex:1 1 auto;min-height:0}
.panel.single{display:grid;grid-template-columns:400px minmax(0,1fr)}
.sidebar{padding:24px 20px;display:flex;flex-direction:column;gap:22px;background:var(--sidebar);box-shadow:inset -1px 0 0 rgba(0,0,0,.06);
  overflow-y:auto;height:calc(100vh - var(--toolbar-h))}
.container-slot{display:contents}
.content{padding:28px 32px;display:flex;flex-direction:column;gap:20px;min-width:0;overflow-y:auto;height:calc(100vh - var(--toolbar-h))}

/* Box type editor */
.bt-grid{display:grid;grid-template-columns:10px minmax(0,1.2fr) repeat(3,minmax(0,1fr)) 40px 22px;gap:5px;align-items:center}
.bt-head{font-size:11px;font-weight:500;color:var(--ink-3);padding-top:2px}
#box-types{display:flex;flex-direction:column;gap:6px}
#box-types input{height:34px;padding:0 6px;font-size:13px}
#box-types input[type=text]{padding:0 8px}
#box-types input[type=number]{-moz-appearance:textfield;appearance:textfield}
#box-types input[type=number]::-webkit-inner-spin-button,#box-types input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.bt-dot{width:10px;height:10px;border-radius:50%}
.del-btn{width:22px;height:22px;border:0;border-radius:50%;background:var(--fill);color:var(--ink-2);display:flex;align-items:center;justify-content:center;
  transition:transform 100ms ease-out,background-color .15s ease,color .15s ease}
.del-btn:hover:not(:disabled){background:var(--err-soft);color:var(--err-ink)}
.del-btn:disabled{opacity:.35;cursor:default}
.bt-err{grid-column:2/-1}

/* ---------- Single: states ---------- */
.state{flex:1 1 auto;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;text-align:center;padding:24px 0}
.state-text{display:flex;flex-direction:column;gap:10px;max-width:560px}
.state-text p{font-size:17px;line-height:1.45;color:var(--ink-2)}
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;width:min(720px,100%)}
.step{padding:18px;display:flex;flex-direction:column;gap:6px;text-align:left}
.step b{font-size:15px;font-weight:600}
.step>span:last-child{font-size:13px;line-height:1.4;color:var(--ink-2)}
.step-num{width:26px;height:26px;border-radius:50%;background:var(--accent-soft);color:var(--accent-ink);font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center}
.state-actions{display:flex;align-items:center;gap:16px}
.state-icon{width:72px;height:72px;border-radius:50%;background:var(--err-soft);color:var(--err-ink);display:flex;align-items:center;justify-content:center}
.check-list{width:min(580px,100%);overflow:hidden;text-align:left}
.check-row{min-height:48px;padding:10px 16px;display:flex;align-items:center;gap:12px;font-size:14px}
.check-row+.check-row{box-shadow:inset 48px 0 0 var(--surface),inset 0 .5px 0 var(--sep)}
.check-row>span:nth-child(2){flex:1}
.check-row .muted{text-align:right}

/* ---------- Single: results ---------- */
.results{flex:1 1 auto;display:flex;flex-direction:column;gap:20px;min-height:0}
.result-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px}
.result-head>div{display:flex;flex-direction:column;gap:4px}
.kpis{display:grid;grid-template-columns:1fr 1fr 1.6fr;gap:12px}
.kpi{padding:16px 20px;display:flex;flex-direction:column;gap:4px}
.kpi>span:first-child{font-size:13px;color:var(--ink-2)}
.kpi.range{justify-content:center;gap:10px}
.range-top{display:flex;justify-content:space-between;font-size:13px;color:var(--ink-2)}
.range-bar{position:relative;height:6px;border-radius:3px;background:rgba(118,118,128,.14)}
.range-bar .band{position:absolute;top:0;bottom:0;border-radius:3px;background:rgba(52,199,89,.35)}
.range-bar .knob{position:absolute;top:-5px;width:16px;height:16px;margin-left:-8px;border-radius:50%;background:#fff;
  box-shadow:0 .5px 4px rgba(0,0,0,.25),0 0 0 .5px rgba(0,0,0,.04)}
.result-grid{flex:1 1 auto;min-height:460px;display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px}
.view-card{position:relative;overflow:hidden;border-radius:18px;background:#fbfbfd;box-shadow:var(--shadow-3);min-height:420px}
.view-card canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;cursor:grab}
.view-card canvas.grabbing{cursor:grabbing}
.float-bar{position:absolute;left:12px;right:12px;display:flex;align-items:center;gap:10px;border-radius:14px;
  background:rgba(255,255,255,.7);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);
  box-shadow:0 1px 3px rgba(0,0,0,.06),inset 0 1px 0 rgba(255,255,255,.6)}
.float-bar.top{top:12px;height:48px;padding:0 8px 0 16px}
.float-bar.bottom{bottom:12px;min-height:40px;padding:6px 16px;flex-wrap:wrap;font-size:13px;border-radius:12px}
.float-bar h2{font-size:15px;font-weight:600;letter-spacing:-.01em}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px}
.leg-item{display:inline-flex;align-items:center;gap:6px}
.leg-dot{width:10px;height:10px;border-radius:50%}
.list-card{display:flex;flex-direction:column;min-height:0;overflow:hidden;border-radius:18px;box-shadow:var(--shadow-3)}
.list-card .card-head{padding:16px 16px 10px 20px;display:flex;align-items:baseline;justify-content:space-between}
.solution-list{flex:1 1 auto;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:2px;padding:0 8px 8px}
.sol-row{display:grid;grid-template-columns:22px minmax(0,1fr) auto;gap:10px;align-items:center;padding:10px 12px;border:0;border-radius:10px;
  background:transparent;text-align:left;transition:background-color .12s ease}
.sol-row:hover{background:var(--fill-2)}
.sol-row .idx{font-size:12px;color:var(--ink-3)}
.sol-row .dims{display:flex;flex-direction:column;gap:1px}
.sol-row .dims b{font-size:14px;font-weight:500}
.sol-row .dims span{font-size:12px;color:var(--ink-2)}
.sol-row .fill{display:flex;align-items:center;gap:8px;font-size:14px}
.sol-row[aria-pressed=true]{background:var(--accent);color:#fff}
.sol-row[aria-pressed=true] .idx,.sol-row[aria-pressed=true] .dims span{color:rgba(255,255,255,.85)}
.sol-row[aria-pressed=true] .mark{background:#fff;border-bottom-color:#fff}
.list-legend{padding:12px 20px 16px;display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12px;color:var(--ink-2)}
.list-legend span{display:inline-flex;align-items:center;gap:6px}
.plan{display:none}
.plan .levels{flex:1 1 auto;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:0 12px 12px}
.level{border-radius:12px;background:var(--bg);padding:12px 14px;display:flex;flex-direction:column;gap:8px}
.level-head{display:flex;justify-content:space-between;font-size:13px}
.level-head b{font-weight:600}
.level-row{display:flex;align-items:center;gap:8px;font-size:13px}
.level-row>span:nth-child(2){flex:1}
.plan-foot{padding:14px 20px 18px;box-shadow:inset 0 .5px 0 var(--sep);display:flex;flex-direction:column;gap:8px;font-size:13px}
.plan-foot div{display:flex;justify-content:space-between}

/* ---------- Batch: import ---------- */
.batch-import{height:calc(100vh - var(--toolbar-h));overflow-y:auto;padding:28px 32px 32px;display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:24px}
.import-main{display:flex;flex-direction:column;gap:20px;min-width:0}
.page-head{display:flex;flex-direction:column;gap:6px}
.page-head p{font-size:15px;line-height:1.45;color:var(--ink-2)}
.dropzone{flex:1 1 auto;min-height:340px;border:2px dashed var(--na);border-radius:22px;background:var(--surface);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;transition:border-color .15s ease,background-color .15s ease,transform .2s ease}
.dropzone:hover{border-color:#aeaeb2}
.dropzone.drag{border-color:var(--accent);background:#f2f7fe;transform:scale(1.005)}
.dz-icon{width:80px;height:80px;border-radius:22px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}
.dz-text{display:flex;flex-direction:column;gap:6px;font-size:15px;color:var(--ink-2)}
.dz-text b{font-size:22px;font-weight:600;letter-spacing:-.02em;color:var(--ink)}
.dz-link{color:var(--accent-ink);font-weight:500}
.requirements{padding:18px 20px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-1)}
.requirements h2{font-size:15px;font-weight:600}
.req-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;font-size:13px;line-height:1.4;color:var(--ink-2)}
.req-grid b{display:block;margin-bottom:2px;font-weight:500;color:var(--ink)}
.file-card{padding:16px 16px 16px 20px;display:flex;align-items:center;gap:16px}
.file-card.error{box-shadow:0 0 0 1.5px var(--err),0 4px 16px rgba(0,0,0,.04)}
.file-icon{flex:0 0 44px;height:44px;border-radius:11px;background:#248a3d;color:#fff;display:flex;align-items:center;justify-content:center}
.file-card.error .file-icon{background:var(--err-soft);color:var(--err-ink)}
.file-card .file-text{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.file-card .file-text b{font-size:15px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-card .file-text span{font-size:13px;color:var(--ink-2)}
.file-card.error .file-text span{color:var(--err-ink)}
.sheet-list{overflow:hidden}
.sheet-row{display:grid;grid-template-columns:28px minmax(0,1.1fr) 90px minmax(0,1.2fr) minmax(0,1.8fr);gap:16px;align-items:center;padding:14px 20px;font-size:14px}
.sheet-row+.sheet-row{box-shadow:inset 64px 0 0 var(--surface),inset 0 .5px 0 var(--sep)}
.sheet-row .name{font-weight:600;overflow:hidden;text-overflow:ellipsis}
.sheet-row .rows{text-align:right}
.sheet-row .note{font-size:13px;line-height:1.35;color:var(--ink-3)}
.sheet-row .note.warn{color:var(--warn-ink)}
.sheet-row.skipped{color:var(--ink-3)}
.sheet-row.skipped .name{color:var(--ink-2)}
.sheet-row.reason{grid-template-columns:28px minmax(0,1fr) minmax(0,2.4fr);align-items:start}
.sheet-row.reason .name,.sheet-row.reason .why{padding-top:2px}
.sheet-row.reason .why{color:var(--ink);line-height:1.4}
.list-caption{padding:4px 0 0 4px;font-size:12px;line-height:1.4;color:var(--ink-2)}
.banner{padding:14px 16px;border-radius:14px;display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.4;background:var(--err-soft);color:#86000e}
.banner svg{flex:0 0 auto;margin-top:1px}
.banner b{display:block;font-weight:600}
.batch-settings{display:flex;flex-direction:column;gap:20px;padding-top:4px;min-height:100%}
.batch-settings .group-box.grid3{border-radius:14px}
.calc-hint{margin-top:-12px;text-align:center;font-size:12px;color:var(--ink-2)}
.calc-hint:empty{display:none}

/* File preview (wide screens) */
.file-preview{display:none;flex-direction:column;gap:8px;min-width:0;padding-top:85px}
.preview-card{overflow:auto}
.preview-card table{border-collapse:collapse;width:100%;font-size:13px;text-align:right}
.preview-card th{padding:6px 6px 8px;font-size:12px;font-weight:500;color:var(--ink-3);white-space:nowrap}
.preview-card thead tr:first-child th{padding-top:12px;font-size:11px;font-weight:600;text-align:left}
.preview-card thead tr:last-child{box-shadow:inset 0 -.5px 0 var(--sep)}
.preview-card td{padding:9px 6px;white-space:nowrap}
.preview-card tbody tr{box-shadow:inset 0 -.5px 0 var(--sep-2)}
.preview-card th:first-child,.preview-card td:first-child{padding-left:20px;text-align:left}
.preview-card th:last-child,.preview-card td:last-child{padding-right:20px}
.preview-card tr.flag{background:#fff8ee}
.preview-card tr.nocartons{color:var(--ink-3)}
.role{padding:3px 8px;border-radius:999px;white-space:nowrap}
.role-article{background:var(--accent-soft);color:var(--accent-ink)}
.role-umkn{background:var(--fill);color:#3a3a3c}
.role-g0{background:rgba(55,138,221,.14);color:#185fa5}
.role-g1{background:rgba(29,158,117,.14);color:#0f6e56}
.preview-card .sum{font-weight:600;color:var(--ink-2)}
.preview-card td.sum{color:var(--ink)}
.preview-card td.sum.flag{color:var(--warn-ink)}
.preview-note{padding:12px 20px;font-size:12px;color:var(--ink-2)}

/* ---------- Batch: run / results ---------- */
.batch-run{height:calc(100vh - var(--toolbar-h));padding:24px 32px 32px;display:flex;flex-direction:column;gap:18px}
.run-head{display:flex;align-items:flex-end;gap:12px}
.run-titles{flex:1;display:flex;flex-direction:column;gap:4px;min-width:0}
.run-titles .title-large .sub{font-size:15px;font-weight:400;letter-spacing:0;color:var(--ink-2);margin-left:12px}
.progress{height:6px;margin-top:8px;border-radius:3px;background:rgba(118,118,128,.16);overflow:hidden}
.progress>div{height:100%;width:0;border-radius:3px;background:var(--accent);transition:width .3s ease}
.summary{padding:18px 20px;display:flex;flex-direction:column;gap:14px}
.proportion{display:flex;height:10px;border-radius:5px;overflow:hidden;gap:2px}
.proportion>div{min-width:0}
.tiles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.tile{display:flex;flex-direction:column;gap:2px}
.tile>span:first-child{font-size:13px;color:var(--ink-2);display:flex;align-items:center;gap:6px}
.run-split{flex:1 1 auto;min-height:0;display:flex;gap:20px}
.results-card{position:relative;flex:1 1 auto;min-width:0;display:flex;flex-direction:column;overflow:hidden;border-radius:18px;box-shadow:var(--shadow-3)}
.results-bar{height:56px;flex-shrink:0;padding:0 16px 0 20px;display:flex;align-items:center;gap:12px;box-shadow:0 .5px 0 var(--sep)}
.inline-select{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-2)}
.inline-select select{height:30px;width:auto;max-width:200px;font-size:13px;font-weight:500;background:var(--fill)}
.tbl-wrap{flex:1 1 auto;min-height:0;overflow:auto}
table.res{width:100%;border-collapse:collapse;font-size:13px}
table.res th{position:sticky;top:0;z-index:1;height:32px;padding:0 12px;text-align:left;font-size:12px;font-weight:500;color:var(--ink-3);white-space:nowrap;
  background:rgba(255,255,255,.85);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:inset 0 -.5px 0 var(--sep)}
table.res td{height:44px;padding:0 12px;white-space:nowrap;box-shadow:inset 0 -.5px 0 var(--sep-2)}
table.res th:first-child,table.res td:first-child{padding-left:20px}
table.res .num{text-align:right}
table.res td.dim{color:var(--ink-3)}
table.res tr.r{cursor:default}
table.res tr.r:hover td{background:rgba(118,118,128,.05)}
table.res tr.r:focus-visible{outline:none}
table.res tr.r:focus-visible td{box-shadow:inset 0 2px 0 rgba(0,113,227,.45),inset 0 -2px 0 rgba(0,113,227,.45)}
table.res tr.sel td{background:var(--accent);color:#fff}
table.res tr.sel .status,table.res tr.sel .change,table.res tr.sel td.dim{color:#fff}
table.res tr.sel .mark{background:#fff;border-bottom-color:#fff}
table.res tr.sel .fillbar{background:rgba(255,255,255,.3)}
table.res tr.sel .fillbar>i{background:#fff}
table.res tr.sel .fillbar>b{background:#fff}
table.res tr.err td{background:#fff5f6}
table.res tr.err.sel td{background:var(--accent)}
table.res td.reason{white-space:normal;font-size:12px;line-height:1.3;color:var(--err-ink);min-width:180px}
table.res tr.sel td.reason{color:#fff}
.fill-col{width:200px}
.open-col{width:36px}
.fill-cell{display:flex;align-items:center;gap:10px}
.fillbar{position:relative;flex:1;height:4px;border-radius:2px;background:rgba(118,118,128,.16)}
.fillbar>i{position:absolute;left:0;top:0;bottom:0;border-radius:2px}
.fillbar>b{position:absolute;top:-3px;width:1.5px;height:10px;border-radius:1px;background:var(--ink)}
.fill-cell>span{width:48px;text-align:right}
.change.good{color:var(--ok-ink)}
.change.bad{color:var(--warn-ink)}
.open-btn{width:28px;height:28px;border:0;border-radius:8px;background:transparent;color:var(--ink-3);display:inline-flex;align-items:center;justify-content:center}
.open-btn:hover{background:var(--fill);color:var(--ink)}
tr.sel .open-btn{color:#fff}
tr.sel .open-btn:hover{background:rgba(255,255,255,.2)}
.empty-row td{height:80px;text-align:center;color:var(--ink-2)}
.spin{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Inspector (wide screens) */
.inspector{display:none;width:460px;flex-shrink:0;flex-direction:column;overflow:hidden;border-radius:18px;box-shadow:var(--shadow-3)}
.insp-head{padding:18px 20px 12px;display:flex;flex-direction:column;gap:4px}
.insp-head h2{font-size:22px;font-weight:600;letter-spacing:-.02em;overflow:hidden;text-overflow:ellipsis}
.insp-head .pill{align-self:flex-start;margin-top:6px}
.insp-view{position:relative;margin:0 12px;height:300px;border-radius:14px;background:#fbfbfd;overflow:hidden}
.insp-view canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none;cursor:grab}
.insp-view .placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:24px;text-align:center;color:var(--ink-3);font-size:13px}
.insp-list{margin:16px 12px 0;border-radius:14px;background:var(--bg);overflow:hidden}
.insp-list .list-row{min-height:42px;padding:0 14px}
.insp-list .list-row+.list-row{box-shadow:inset 14px 0 0 var(--bg),inset 0 .5px 0 var(--sep)}
.insp-list .list-row>span:first-child{color:var(--ink-2)}
.insp-list .list-row>span:last-child{font-weight:500;text-align:right}
.insp-notes{margin:12px 12px 0;padding:12px 14px;border-radius:14px;background:var(--warn-soft);color:#7a3d00;font-size:13px;line-height:1.4;display:flex;flex-direction:column;gap:4px}
.insp-actions{margin-top:auto;padding:16px 12px 12px;display:flex;gap:8px}
.insp-actions .btn-primary{flex:1;height:40px;border-radius:20px}
.insp-actions .icon-btn{width:40px;height:40px;border-radius:20px;background:var(--fill)}
.insp-empty{flex:1;display:flex;align-items:center;justify-content:center;padding:32px;text-align:center;color:var(--ink-3);font-size:14px;line-height:1.4}

/* ---------- Wide screens: use the space for an extra panel ---------- */
@media (min-width:1800px){
  .panel.single{grid-template-columns:440px minmax(0,1fr)}
  .result-grid{grid-template-columns:minmax(0,1fr) 400px 340px}
  .plan{display:flex}
  .batch-import.has-preview{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr) 420px}
  .batch-import.has-preview .file-preview{display:flex}
  .batch-import:not(.has-preview){grid-template-columns:minmax(0,1fr) 440px}
  .inspector{display:flex}
}
/* Narrow desktop windows: stack the 3D view above the solution list */
@media (max-width:1180px){
  .panel.single{grid-template-columns:360px minmax(0,1fr)}
  .result-grid{grid-template-columns:minmax(0,1fr);grid-auto-rows:minmax(420px,auto)}
  .kpis{grid-template-columns:1fr 1fr}
  .kpi.range{grid-column:1/-1}
  .batch-import{grid-template-columns:minmax(0,1fr) 340px}
  .steps,.req-grid{grid-template-columns:1fr}
}

/* ---------- Accessibility preferences ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}
  .btn:active:not(:disabled),.link-btn:active,.icon-btn:active,.segmented>button:active{transform:none}
  .spin{animation:none}
}
@media (prefers-reduced-transparency:reduce){
  .toolbar,.float-bar,table.res th{background:#fff;-webkit-backdrop-filter:none;backdrop-filter:none}
}
@media (prefers-contrast:more){
  :root{--ink-2:#3a3a3c;--ink-3:#48484a;--sep:rgba(60,60,67,.5);--sep-2:rgba(60,60,67,.35)}
  .toolbar,.float-bar{background:#fff;box-shadow:0 0 0 1px #1d1d1f}
  .card,.group-box,.list-card,.results-card,.view-card,.inspector{box-shadow:0 0 0 1px rgba(0,0,0,.4)}
  input[type=number],input[type=text],select{box-shadow:inset 0 0 0 1px #6e6e73}
}