/* ============================================================
   智能装箱系统 — 统一样式表
   设计语言：参考 container_wizard_v2.html / container_result_3d.html
   ============================================================ */

/* ---------- CSS Variables (light / dark) ---------- */
:root {
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f5f5f7;
  --color-bg-tertiary: #ebebed;
  --color-bg-info: #e6f1fb;
  --color-border-primary: #c7c7cc;
  --color-border-secondary: #d1d1d6;
  --color-border-tertiary: #e5e5ea;
  --color-text-primary: #1c1c1e;
  --color-text-secondary: #6e6e73;
  --color-text-tertiary: #aeaeb2;
  --color-text-info: #185fa5;
  --color-accent: #378add;
  --color-accent-dark: #0c447c;
  --color-green: #3b6d11;
  --color-warn: #ba7517;
  --color-red: #a32d2d;
  --border-radius-sm: 6px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #1c1c1e;
    --color-bg-secondary: #2c2c2e;
    --color-bg-tertiary: #3a3a3c;
    --color-bg-info: #1a2d42;
    --color-border-primary: #48484a;
    --color-border-secondary: #3a3a3c;
    --color-border-tertiary: #2c2c2e;
    --color-text-primary: #f2f2f7;
    --color-text-secondary: #aeaeb2;
    --color-text-tertiary: #636366;
    --color-text-info: #69b2f5;
    --color-accent: #4fa3f5;
    --color-accent-dark: #69b2f5;
    --color-green: #5da83d;
    --color-warn: #d4931f;
    --color-red: #d05050;
  }
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 14px;
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  min-height: 100vh;
}
input, select, button, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- App Layout ---------- */
#app { display: flex; flex-direction: column; min-height: 100vh; }

/* Header */
.app-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  height: 52px;
  background: var(--color-bg-primary);
  border-bottom: 0.5px solid var(--color-border-tertiary);
  box-shadow: var(--shadow-sm);
  position: sticky; top: 0; z-index: 100;
}
.app-logo {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, #185fa5, #1d9e75);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 14px; font-weight: 700;
  flex-shrink: 0;
}
.app-title { font-size: 15px; font-weight: 600; color: var(--color-text-primary); }
.app-subtitle { font-size: 11px; color: var(--color-text-secondary); margin-left: 4px; }
.header-spacer { flex: 1; }
.header-nav { display: flex; gap: 6px; }
.nav-btn {
  font-size: 12px; padding: 5px 14px;
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  transition: all 0.15s;
}
.nav-btn:hover { background: var(--color-bg-primary); color: var(--color-text-primary); }
.nav-btn.active {
  background: #e6f1fb; border-color: var(--color-accent);
  color: var(--color-accent-dark); font-weight: 500;
}

/* Main content */
.app-main { flex: 1; padding: 20px; max-width: 1100px; margin: 0 auto; width: 100%; }

/* ---------- Panel visibility ---------- */
.panel { display: none; }
.panel.active { display: block; }

/* ---------- Wizard Steps ---------- */
.steps {
  display: flex;
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--color-bg-secondary);
}
.step {
  flex: 1; padding: 10px 8px; font-size: 11px;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  text-align: center;
  border-right: 0.5px solid var(--color-border-tertiary);
  cursor: pointer;
  transition: background 0.15s;
}
.step:last-child { border-right: none; }
.step.active { background: var(--color-bg-primary); color: var(--color-text-primary); font-weight: 500; }
.step.done { color: var(--color-green); }
.step-num { display: block; font-size: 17px; font-weight: 600; margin-bottom: 2px; }

/* ---------- Card ---------- */
.card {
  background: var(--color-bg-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-lg);
  padding: 18px;
  margin-bottom: 12px;
}
.card-title { font-size: 14px; font-weight: 500; color: var(--color-text-primary); margin-bottom: 14px; }
.card-subtitle { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 10px; }

/* ---------- Info box ---------- */
.info-box {
  display: flex; gap: 8px; padding: 9px 11px;
  background: var(--color-bg-info);
  border-radius: var(--border-radius-md);
  margin-bottom: 12px;
}
.info-box span { font-size: 12px; color: var(--color-text-info); line-height: 1.5; }

/* ---------- Summary grid ---------- */
.summary-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 10px; margin-bottom: 12px;
}
/* 货物清单：统计在表格上方，与表区域留出间距 */
.summary-grid.summary-grid--p1 {
  margin-top: 4px;
  margin-bottom: 18px;
  gap: 12px;
}
.sum-card {
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  padding: 10px 12px;
}
.sum-val { font-size: 20px; font-weight: 500; color: var(--color-text-primary); }
.sum-val.ok { color: var(--color-green); }
.sum-val.warn { color: var(--color-warn); }
.sum-val.bad { color: var(--color-red); }
.sum-lbl { font-size: 11px; color: var(--color-text-secondary); margin-top: 2px; }

/* 货物清单顶部卡片：放大、加图标、区分颜色，与下方表格形成视觉层级 */
.summary-grid--p1 .sum-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.summary-grid--p1 .sum-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--sum-accent, var(--color-accent));
}
.summary-grid--p1 .sum-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.summary-grid--p1 .sum-icon {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: var(--sum-accent-bg, rgba(55, 138, 221, 0.12));
  color: var(--sum-accent, var(--color-accent));
}
.summary-grid--p1 .sum-text { flex: 1; min-width: 0; }
.summary-grid--p1 .sum-val {
  font-size: 26px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.5px;
  color: var(--color-text-primary);
}
.summary-grid--p1 .sum-lbl {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-top: 4px;
}
.summary-grid--p1 .sum-card--sku {
  --sum-accent: #378add;
  --sum-accent-bg: rgba(55, 138, 221, 0.12);
}
.summary-grid--p1 .sum-card--boxes {
  --sum-accent: #0c8577;
  --sum-accent-bg: rgba(12, 133, 119, 0.12);
}
.summary-grid--p1 .sum-card--weight {
  --sum-accent: #ba7517;
  --sum-accent-bg: rgba(186, 117, 23, 0.14);
}
.summary-grid--p1 .sum-card--vol {
  --sum-accent: #6b46c1;
  --sum-accent-bg: rgba(107, 70, 193, 0.14);
}
@media (prefers-color-scheme: dark) {
  .summary-grid--p1 .sum-card--sku    { --sum-accent: #4fa3f5; --sum-accent-bg: rgba(79,163,245,0.18); }
  .summary-grid--p1 .sum-card--boxes  { --sum-accent: #3dc7b3; --sum-accent-bg: rgba(61,199,179,0.18); }
  .summary-grid--p1 .sum-card--weight { --sum-accent: #d4931f; --sum-accent-bg: rgba(212,147,31,0.20); }
  .summary-grid--p1 .sum-card--vol    { --sum-accent: #a78bfa; --sum-accent-bg: rgba(167,139,250,0.20); }
}

/* ---------- Nav row ---------- */
.nav-row {
  display: flex; justify-content: space-between;
  align-items: center; margin-top: 14px;
}
.btn-next {
  background: #185fa5; color: #e6f1fb;
  border: none; border-radius: var(--border-radius-md);
  padding: 9px 22px; font-size: 13px; font-weight: 500; cursor: pointer;
  transition: background 0.15s;
}
.btn-next:hover { background: var(--color-accent-dark); }
.btn-back {
  background: transparent; border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-md);
  padding: 9px 18px; font-size: 13px; cursor: pointer;
  color: var(--color-text-primary); transition: background 0.15s;
}
.btn-back:hover { background: var(--color-bg-secondary); }
.btn-run {
  background: var(--color-green); color: #eaf3de;
  border: none; border-radius: var(--border-radius-md);
  padding: 9px 22px; font-size: 13px; font-weight: 500; cursor: pointer;
  transition: background 0.15s;
}
.btn-run:hover { background: #27500a; }
.btn-outline {
  background: transparent; border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-md);
  padding: 7px 14px; font-size: 12px; cursor: pointer;
  color: var(--color-text-primary); transition: background 0.15s;
}
.btn-outline:hover { background: var(--color-bg-secondary); }

/* ---------- Tables ---------- */
.tbl { width: 100%; border-collapse: collapse; font-size: 12px; }
.tbl th {
  text-align: left; padding: 7px 8px;
  color: var(--color-text-secondary); font-weight: 400;
  border-bottom: 0.5px solid var(--color-border-tertiary);
  font-size: 11px; background: var(--color-bg-secondary);
}
.tbl td {
  padding: 7px 8px;
  border-bottom: 0.5px solid var(--color-border-tertiary);
  color: var(--color-text-primary); vertical-align: middle;
}
.tbl tr:last-child td { border-bottom: none; }
.tbl input[type=number], .tbl input[type=text], .tbl select {
  background: var(--color-bg-secondary);
  border: 0.5px solid var(--color-border-secondary);
  border-radius: 4px; padding: 3px 6px;
  color: var(--color-text-primary);
}
.tbl input[type=number]:focus, .tbl input[type=text]:focus {
  outline: 1.5px solid var(--color-accent);
  background: var(--color-bg-primary);
}

/* color dot */
.cdot {
  width: 9px; height: 9px; border-radius: 2px;
  display: inline-block; margin-right: 5px;
  vertical-align: middle; flex-shrink: 0;
}

/* ---------- Badges ---------- */
.badge {
  display: inline-block; font-size: 10px;
  padding: 2px 6px; border-radius: 3px; margin-left: 4px;
}
.badge-front { background: #e6f1fb; color: #0c447c; }
.badge-back  { background: #e1f5ee; color: #085041; }
.badge-no_top { background: #f3e8ff; color: #5b2c87; }

/* ---------- Zone pills (restrict) ---------- */
.zone-pill {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; padding: 3px 8px; border-radius: 4px;
  border: 0.5px solid var(--color-border-tertiary);
  cursor: pointer; background: var(--color-bg-secondary);
  color: var(--color-text-secondary); margin: 2px;
  transition: all 0.15s; white-space: nowrap;
}
.zone-pill.active-front  { background: #e6f1fb; border-color: #378add; color: #0c447c; }
.zone-pill.active-back   { background: #e1f5ee; border-color: #1d9e75; color: #085041; }
/* 与装里面/放门口同一套规则：继承 .zone-pill 的 padding/border 宽度，仅换紫色主题 */
.zone-pill.active-no_top { background: #ede9fe; border-color: #7c3aed; color: #4c1d95; }
.zone-pill.active-load1  { background: #fef3c7; border-color: #d97706; color: #92400e; }
.zone-pill.active-load2  { background: #ffedd5; border-color: #ea580c; color: #9a3412; }
/* 表头仅为示意，勿用 active-*，否则与行内选中态撞色 */
.zone-pill.zone-pill--legend {
  pointer-events: none;
  cursor: default;
  background: var(--color-bg-tertiary);
  border-style: dashed;
  color: var(--color-text-secondary);
  opacity: 0.95;
}

/* ---------- Toggle switch ---------- */
.toggle { position: relative; width: 36px; height: 20px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: var(--color-border-secondary);
  border-radius: 10px; cursor: pointer; transition: background 0.2s;
}
.toggle input:checked + .toggle-slider { background: var(--color-accent); }
.toggle-slider::before {
  content: ''; position: absolute;
  width: 16px; height: 16px; left: 2px; top: 2px;
  background: white; border-radius: 50%; transition: transform 0.2s;
}
.toggle input:checked + .toggle-slider::before { transform: translateX(16px); }
.toggle-row {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 0.5px solid var(--color-border-tertiary);
}
.toggle-row:last-child { border-bottom: none; }

/* ---------- Container option cards ---------- */
.cont-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.cont-opt {
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-lg);
  padding: 14px 12px; cursor: pointer;
  text-align: center; transition: border-color 0.15s;
}
.cont-opt:hover { border-color: var(--color-border-secondary); }
.cont-opt.selected { border: 2px solid var(--color-accent); background: #e6f1fb; }
.cont-opt.selected .co-name,
.cont-opt.selected .co-sub,
.cont-opt.selected .co-dim { color: var(--color-accent-dark); }
.co-svg { margin: 0 auto 10px; display: block; }
.co-name { font-size: 13px; font-weight: 500; color: var(--color-text-primary); margin-bottom: 4px; }
.co-sub  { font-size: 11px; color: var(--color-text-secondary); margin-bottom: 6px; }
.co-dim  { font-size: 11px; color: var(--color-text-secondary); line-height: 1.7; }
.co-badge {
  display: inline-block; font-size: 10px; padding: 2px 7px;
  border-radius: 4px; margin-top: 5px;
  background: var(--color-bg-secondary); color: var(--color-text-secondary);
}
.cont-opt.selected .co-badge { background: #b5d4f4; color: #0c447c; }

/* ---------- 已选货柜 chip 列表 ---------- */
.cont-chip-row {
  display: flex; flex-wrap: wrap; gap: 8px; min-height: 36px;
  padding: 4px 0;
}
.cont-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-bg-info);
  border: 1.5px solid var(--color-accent);
  border-radius: 20px;
  padding: 4px 10px 4px 12px;
  font-size: 13px; font-weight: 500; color: var(--color-accent-dark);
}
.cont-chip-del {
  background: none; border: none; cursor: pointer;
  font-size: 14px; line-height: 1;
  color: var(--color-accent); padding: 0 2px;
  border-radius: 50%;
  transition: background 0.1s;
}
.cont-chip-del:hover { background: rgba(55,138,221,0.15); }

/* ---------- 添加货柜按钮组 ---------- */
.cont-add-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}
.cont-add-opt {
  border: 1.5px dashed var(--color-border-secondary);
  border-radius: var(--border-radius-lg);
  padding: 12px 8px; cursor: pointer;
  text-align: center; transition: border-color 0.15s, background 0.15s;
}
.cont-add-opt:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-info);
}
.cont-add-opt:hover .co-name { color: var(--color-accent-dark); }
.cont-add-opt .co-name { font-size: 13px; font-weight: 500; color: var(--color-text-primary); margin: 6px 0 2px; }
.cont-add-opt .co-dim  { font-size: 11px; color: var(--color-text-secondary); }

/* ---------- Pallet option cards ---------- */
.pallet-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.pallet-opt {
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-md);
  padding: 10px; cursor: pointer; text-align: center;
  transition: border-color 0.15s;
}
.pallet-opt.selected { border: 2px solid #1d9e75; background: #e1f5ee; }
.pallet-opt.selected .po-name { color: #085041; }
.po-name { font-size: 12px; font-weight: 500; color: var(--color-text-primary); }
.po-dim  { font-size: 11px; color: var(--color-text-secondary); margin-top: 2px; }
.pallet-detail {
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  padding: 12px; margin-top: 10px;
}
.pd-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.pd-row:last-child { margin-bottom: 0; }
.pd-label { font-size: 12px; color: var(--color-text-secondary); min-width: 110px; }

/* ---------- Stats bar (result view) ---------- */
.stats-bar {
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 8px; padding: 12px;
  background: var(--color-bg-secondary);
  border-bottom: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  margin-bottom: 0;
}
.stat { text-align: center; }
.stat-val { font-size: 18px; font-weight: 500; color: var(--color-text-primary); }
.stat-val.ok   { color: var(--color-green); }
.stat-val.warn { color: var(--color-warn); }
.stat-val.bad  { color: var(--color-red); }
.stat-lbl { font-size: 11px; color: var(--color-text-secondary); margin-top: 2px; }

/* ---------- Result tabs ---------- */
.result-card {
  background: var(--color-bg-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}
.result-tabs {
  display: flex;
  border-bottom: 0.5px solid var(--color-border-tertiary);
}
.rtab {
  padding: 9px 18px; font-size: 13px;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -0.5px;
}
.rtab.active {
  color: var(--color-text-primary); font-weight: 500;
  border-bottom-color: var(--color-accent);
}

/* ---------- 3D Canvas area ---------- */
.ctrl-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  border-bottom: 0.5px solid var(--color-border-tertiary);
  flex-wrap: wrap;
}
.ctrl-btn {
  font-size: 12px; padding: 4px 10px;
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-md);
  cursor: pointer; background: var(--color-bg-secondary);
  color: var(--color-text-primary); transition: background 0.1s;
}
.ctrl-btn:hover { background: var(--color-bg-primary); }
.ctrl-btn.active { background: #e6f1fb; border-color: var(--color-accent); color: #0c447c; }
.cont-select { display: flex; gap: 6px; }
.cont-btn {
  font-size: 12px; padding: 4px 12px;
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-md);
  cursor: pointer; background: var(--color-bg-secondary);
  color: var(--color-text-secondary); transition: all 0.15s;
}
.cont-btn.active { background: #185fa5; color: #e6f1fb; border-color: #185fa5; }
canvas { display: block; width: 100%; }
.legend-wrap {
  padding: 8px 12px;
  border-top: 0.5px solid var(--color-border-tertiary);
  display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center;
  background: var(--color-bg-secondary);
}
.leg-item {
  display: flex; align-items: center; gap: 5px;
  font-size: 11px; color: var(--color-text-secondary);
}
.leg-dot { width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; }
.leg-name {
  font-weight: 500;
  color: var(--color-text-primary);
  margin-right: 6px;
}
.leg-code {
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* ---------- Drag hint ---------- */
.drag-hint {
  font-size: 11px; color: var(--color-text-tertiary);
  margin-left: auto; padding-right: 4px;
}

/* ---------- Progress bar ---------- */
.pbar {
  height: 5px; border-radius: 3px;
  background: var(--color-bg-secondary);
  margin-top: 3px; overflow: hidden;
}
.pbar-fill { height: 100%; border-radius: 3px; background: var(--color-accent); }
.pbar-fill.full { background: var(--color-green); }

/* ---------- Compare panel ---------- */
.compare-header {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
}
.compare-slots { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.compare-slot {
  flex: 1; min-width: 180px;
  border: 0.5px dashed var(--color-border-secondary);
  border-radius: var(--border-radius-lg);
  padding: 14px; text-align: center;
  font-size: 12px; color: var(--color-text-secondary);
  cursor: pointer; transition: all 0.15s;
}
.compare-slot.filled {
  border-style: solid; border-color: var(--color-accent);
  background: #e6f1fb; color: var(--color-accent-dark);
  cursor: default;
}
.compare-slot.filled .slot-name { font-weight: 500; font-size: 13px; margin-bottom: 4px; }
.compare-bar-chart { margin-top: 16px; }
.cbar-label { font-size: 11px; color: var(--color-text-secondary); margin-bottom: 6px; }
.cbar-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.cbar-key { font-size: 11px; color: var(--color-text-secondary); min-width: 60px; text-align: right; }
.cbar-track { flex: 1; height: 16px; background: var(--color-bg-secondary); border-radius: 4px; overflow: hidden; display: flex; gap: 2px; padding: 2px; }
.cbar-seg { border-radius: 3px; height: 100%; transition: width 0.4s ease; }
.cbar-legend { display: flex; gap: 10px; margin-top: 6px; }
.cbar-leg-item { display: flex; align-items: center; gap: 4px; font-size: 11px; color: var(--color-text-secondary); }
.cbar-leg-dot { width: 10px; height: 10px; border-radius: 2px; }

/* ---------- Warning box ---------- */
.warn-box {
  display: flex; gap: 8px; padding: 9px 11px;
  background: #faeeda; border-radius: var(--border-radius-md);
  margin-bottom: 10px;
}
.warn-box span { font-size: 12px; color: #633806; line-height: 1.5; }

/* ---------- Loading overlay ---------- */
#loadingOverlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 200; align-items: center; justify-content: center;
}
#loadingOverlay.active { display: flex; }
.loader-box {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius-lg);
  padding: 28px 36px; text-align: center;
  box-shadow: var(--shadow-md);
}
.loader-spinner {
  width: 36px; height: 36px; margin: 0 auto 14px;
  border: 3px solid var(--color-border-secondary);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader-text { font-size: 13px; color: var(--color-text-secondary); }

/* ---------- Save solution modal ---------- */
.modal-mask {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 300;
  align-items: center; justify-content: center;
  padding: 20px;
}
.modal-mask.active { display: flex; }
.modal-box {
  background: var(--color-bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: 22px 24px 18px;
  width: 100%; max-width: 420px;
  display: flex; flex-direction: column; gap: 14px;
}
.modal-title {
  font-size: 16px; font-weight: 600;
  color: var(--color-text-primary);
}
.modal-field { display: flex; flex-direction: column; gap: 6px; }
.modal-field label {
  font-size: 12px;
  color: var(--color-text-secondary);
}
.modal-box input[type=text],
.modal-box textarea {
  font-size: 13px;
  background: var(--color-bg-secondary);
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-sm);
  padding: 8px 10px;
  color: var(--color-text-primary);
  font-family: inherit;
  width: 100%;
  resize: vertical;
}
.modal-box input[type=text]:focus,
.modal-box textarea:focus {
  outline: 1.5px solid var(--color-accent);
  background: var(--color-bg-primary);
}
.modal-actions {
  display: flex; justify-content: flex-end; gap: 8px;
  margin-top: 4px;
}

/* ---------- 历史方案表格 ---------- */
#historyTable th,
#historyTable td {
  padding: 8px 10px;
  border-bottom: 0.5px solid var(--color-border-tertiary);
}
#historyTable th {
  font-size: 12px; font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  text-align: left;
}
#historyTable tbody tr:hover { background: var(--color-bg-secondary); }
.history-name { font-weight: 500; color: var(--color-text-primary); }
.history-note { font-size: 12px; opacity: 0.7; cursor: help; }
.btn-outline.btn-sm {
  font-size: 12px;
  padding: 3px 10px;
  margin-left: 4px;
}
.btn-outline.btn-sm.btn-danger {
  color: var(--color-red);
  border-color: var(--color-red);
}
.btn-outline.btn-sm.btn-danger:hover {
  background: var(--color-red);
  color: #fff;
}

/* 历史方案：移动端卡片视图（默认隐藏，桌面用表格） */
.history-cards-mobile {
  display: none;
  padding: 10px;
}
.history-empty {
  padding: 28px 16px;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 13px;
}
.history-card {
  background: var(--color-bg-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 14px;
  margin-bottom: 10px;
}
.history-card-head {
  display: flex; align-items: baseline; gap: 8px;
  margin-bottom: 10px;
}
.history-card-name {
  flex: 1; min-width: 0;
  font-size: 15px; font-weight: 600;
  color: var(--color-text-primary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.history-card-time {
  flex: 0 0 auto;
  font-size: 11px;
  color: var(--color-text-secondary);
}
.history-card-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 10px;
  padding: 10px 8px;
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  margin-bottom: 10px;
}
.hc-stat {
  text-align: center;
  min-width: 0;
}
.hc-val {
  font-size: 15px; font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.1;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.hc-lbl {
  font-size: 11px;
  color: var(--color-text-secondary);
  margin-top: 3px;
}
.history-card-note {
  font-size: 12px;
  color: var(--color-text-secondary);
  background: var(--color-bg-info);
  border-left: 3px solid var(--color-text-info);
  padding: 6px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
  word-break: break-word;
}
.history-card-actions {
  display: flex; justify-content: flex-end; gap: 8px;
}
.history-card-actions .btn-outline.btn-sm {
  min-height: 36px;
  padding: 6px 16px;
  font-size: 13px;
  margin-left: 0;
}

/* ---------- Utility ---------- */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.section-label { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 6px; display: block; }
input[type=number], input[type=text], select {
  font-size: 13px;
  background: var(--color-bg-secondary);
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-sm);
  padding: 5px 8px; width: 100%;
  color: var(--color-text-primary);
}
input[type=number]:focus, input[type=text]:focus, select:focus {
  outline: 1.5px solid var(--color-accent);
  background: var(--color-bg-primary);
}
.divider { width: 1px; height: 20px; background: var(--color-border-tertiary); }
.list-wrap { padding: 12px; overflow-x: auto; }
.text-secondary { font-size: 12px; color: var(--color-text-secondary); }
/* ---------- 3D 装载序列控制栏 ---------- */
.seq-row {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  background: var(--color-bg-secondary);
  border-bottom: 0.5px solid var(--color-border-tertiary);
}
.seq-row input[type=range] {
  -webkit-appearance: none; appearance: none;
  height: 4px; border-radius: 2px;
  background: var(--color-border-secondary);
  outline: none; padding: 0; border: none;
  cursor: pointer;
  flex: 1 1 0;
  min-width: 0;
  width: 100%;
  max-width: 100%;
}
/* 展开图：滑条与左右键同组，避免与右侧按钮重叠 */
.explode-slider-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 0;
  min-width: 0;
}
.explode-slider-wrap .ctrl-btn {
  flex-shrink: 0;
}
.explode-slider-wrap input[type=range] {
  flex: 1 1 0;
  min-width: 0;
}
.seq-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--color-accent); cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* 散装展开图：SKU / 分层 切换 */
.explode-mode-seg {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-right: 4px;
}
.explode-mode-lbl {
  font-size: 11px;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* ---------- 重心/透视 toggle 标签 ---------- */
.ctrl-toggle {
  display: flex; align-items: center; gap: 5px;
  font-size: 12px; cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px 8px;
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-md);
  background: var(--color-bg-secondary);
  transition: background 0.1s;
  user-select: none;
}
.ctrl-toggle:hover { background: var(--color-bg-primary); }
.ctrl-toggle input { cursor: pointer; }

/* ---------- 重量分布信息卡 ---------- */
.weight-zones-card {
  position: absolute; bottom: 12px; right: 12px;
  background: rgba(28,28,30,0.78);
  color: #f2f2f7;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 12px;
  min-width: 160px;
  pointer-events: auto;
  backdrop-filter: blur(4px);
  line-height: 1.7;
}
.wz-title {
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.04em;
  opacity: 0.7; margin-bottom: 5px;
}
.wz-row { display: flex; justify-content: space-between; gap: 12px; }
.wz-label { opacity: 0.65; }
.wz-cog { margin-top: 4px; padding-top: 4px; border-top: 0.5px solid rgba(255,255,255,0.18); }

/* ---------- 货物清单表：表头与列数据对齐 ---------- */
.tbl.tbl-items {
  table-layout: fixed;
  width: 100%;
}
.tbl.tbl-items th,
.tbl.tbl-items td {
  overflow-wrap: anywhere;
  word-break: break-word;
}
.tbl.tbl-items th:nth-child(1),
.tbl.tbl-items td:nth-child(1) {
  width: 15%;
  min-width: 11.5rem;
  text-align: left;
}
.tbl.tbl-items td:nth-child(1) {
  overflow: visible;
  vertical-align: middle;
}
.tbl.tbl-items th:nth-child(2),
.tbl.tbl-items td:nth-child(2) { width: 13%; text-align: left; }
.tbl.tbl-items th:nth-child(3),
.tbl.tbl-items td:nth-child(3) { width: 8%; text-align: right; }
.tbl.tbl-items th:nth-child(4),
.tbl.tbl-items td:nth-child(4) { width: 6%; text-align: center; }
.tbl.tbl-items th:nth-child(5),
.tbl.tbl-items td:nth-child(5) { width: 6%; text-align: center; }
.tbl.tbl-items th:nth-child(6),
.tbl.tbl-items td:nth-child(6),
.tbl.tbl-items th:nth-child(7),
.tbl.tbl-items td:nth-child(7),
.tbl.tbl-items th:nth-child(8),
.tbl.tbl-items td:nth-child(8) { width: 7%; text-align: center; }
.tbl.tbl-items th:nth-child(9),
.tbl.tbl-items td:nth-child(9) { width: 9%; text-align: right; }
.tbl.tbl-items th:nth-child(10),
.tbl.tbl-items td:nth-child(10) { width: 9%; text-align: right; }
.tbl.tbl-items th:nth-child(11),
.tbl.tbl-items td:nth-child(11) { width: 5%; text-align: center; padding-left: 4px; padding-right: 4px; }

/* ---------- 货物清单只读单元格 ---------- */
.tbl .tbl-val {
  display: inline-block;
  max-width: 100%;
  font-size: 12px;
  color: var(--color-text-primary);
  word-break: break-word;
  vertical-align: middle;
}
.tbl.tbl-items td:nth-child(3) .tbl-val,
.tbl.tbl-items td:nth-child(9) .tbl-val {
  display: block;
  width: 100%;
  text-align: right;
}
.tbl .tbl-val-code { min-width: 0; white-space: normal; word-break: break-all; }
.tbl .tbl-val-name { max-width: 100%; }

/* ---------- 3D canvas (touch + responsive height) ---------- */
#c3d.canvas-3d,
.canvas-3d {
  width: 100%;
  display: block;
  height: min(480px, 55vh);
  min-height: 220px;
  touch-action: none;
}
.canvas-wrap-3d {
  position: relative;
}

/* ---------- Mobile cards (wizard) — hidden on desktop ---------- */
.scroll-hint-mobile {
  display: none;
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin: 0 0 8px;
}
.items-cards-mobile,
.restrict-cards-mobile {
  display: none;
}
.card-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}
.card-toolbar-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.table-scroll-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* 货物清单 — 窄屏单行卡片（物料编码 / 名称 / 箱数） */
.item-card.item-card--row {
  display: flex;
  align-items: stretch;
  gap: 8px;
  padding: 8px 10px;
  margin-bottom: 8px;
  background: var(--color-bg-secondary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-md);
}
.item-card-dot {
  flex-shrink: 0;
  align-self: center;
}
.item-card-line {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: flex-end;
  gap: 6px 8px;
  flex: 1;
  min-width: 0;
}
.item-card-seg {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.item-card-mini-lbl {
  font-size: 10px;
  color: var(--color-text-secondary);
  line-height: 1.2;
  white-space: nowrap;
}
.item-card-seg--code {
  flex: 0 1 32%;
  max-width: 40%;
  min-width: 7.5rem;
}
/* 物料编码：换行展示，不出现横向滚动条 */
.item-card-seg--code .item-card-readonly-val {
  white-space: normal;
  overflow: visible;
  word-break: break-all;
  overflow-wrap: anywhere;
}
.item-card-seg--name {
  flex: 1 1 0;
  min-width: 0;
}
.item-card-readonly-val {
  font-size: 13px;
  color: var(--color-text-primary);
  line-height: 1.35;
  word-break: break-all;
  min-width: 0;
}
.item-card-seg--boxes {
  flex: 0 0 auto;
  text-align: right;
  padding-right: 2px;
}
.item-card-box-val {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}
.item-card-del {
  flex-shrink: 0;
  align-self: center;
  margin-left: 2px;
}

.restrict-card {
  background: var(--color-bg-secondary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--border-radius-md);
  padding: 12px;
  margin-bottom: 10px;
}
.restrict-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.restrict-card-name {
  flex: 1;
  font-weight: 500;
  font-size: 14px;
  min-width: 0;
  word-break: break-word;
}
.restrict-card-boxes {
  font-size: 12px;
  color: var(--color-text-secondary);
}
.restrict-card-zones {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

/* ---------- Narrow screens ---------- */
@media (max-width: 640px) {
  #app {
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
    padding-bottom: env(safe-area-inset-bottom, 0);
  }
  .app-header {
    flex-wrap: wrap;
    height: auto;
    min-height: 52px;
    padding: 8px 12px;
    padding-top: max(8px, env(safe-area-inset-top, 0));
    gap: 8px;
  }
  .app-subtitle {
    display: none;
  }
  .header-spacer {
    display: none;
  }
  .header-nav {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
    gap: 8px;
    padding-bottom: 2px;
  }
  .nav-btn {
    flex: 0 0 auto;
    padding: 10px 16px;
    font-size: 13px;
    min-height: 44px;
  }
  .app-main {
    padding: 12px;
    padding-bottom: max(16px, env(safe-area-inset-bottom, 12px));
  }
  /* 单行五步：均分宽度，避免 2×2+1 折行 */
  .steps {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
  }
  .steps::-webkit-scrollbar {
    display: none;
  }
  .step {
    flex: 1 1 0;
    min-width: 0;
    min-height: 44px;
    padding: 8px 3px;
    font-size: 10px;
    line-height: 1.2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-right: 0.5px solid var(--color-border-tertiary);
  }
  .step:last-child {
    border-right: none;
  }
  .step .step-num {
    font-size: 14px;
    margin-bottom: 2px;
    line-height: 1.1;
  }
  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .summary-grid--p1 .sum-card {
    padding: 12px 14px;
    gap: 10px;
  }
  .summary-grid--p1 .sum-icon {
    width: 34px; height: 34px;
    border-radius: 8px;
  }
  .summary-grid--p1 .sum-val { font-size: 22px; }
  .summary-grid--p1 .sum-lbl { font-size: 11px; }
  /* 装载结果统计：单行五列，与桌面一致 */
  .stats-bar {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 2px;
    padding: 8px 4px;
  }
  .stats-bar .stat-val {
    font-size: clamp(11px, 2.9vw, 15px);
    line-height: 1.15;
    word-break: break-all;
  }
  .stats-bar .stat-lbl {
    font-size: 9px;
    margin-top: 3px;
    line-height: 1.2;
    padding: 0;
  }
  .cont-add-grid {
    grid-template-columns: 1fr;
  }
  .pallet-grid {
    grid-template-columns: 1fr;
  }
  .grid2,
  .grid3 {
    grid-template-columns: 1fr;
  }
  .nav-row {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .nav-row .btn-next,
  .nav-row .btn-back,
  .nav-row .btn-run {
    width: 100%;
    text-align: center;
    min-height: 44px;
  }
  .tbl td,
  .tbl th {
    padding: 9px 8px;
  }
  .tbl input[type=number],
  .tbl input[type=text],
  .tbl select {
    min-height: 40px;
    padding: 6px 8px;
    font-size: 16px;
  }
  input[type=number],
  input[type=text],
  select,
  textarea {
    font-size: 16px;
  }
  .scroll-hint-mobile {
    display: block;
  }
  .items-desktop-wrap {
    display: none;
  }
  .items-cards-mobile {
    display: block;
  }
  .restrict-desktop-wrap {
    display: none;
  }
  .restrict-cards-mobile {
    display: block;
  }
  .history-desktop-wrap {
    display: none;
  }
  .history-cards-mobile {
    display: block;
  }
  .compare-header {
    flex-wrap: wrap;
  }
  .compare-slots {
    flex-direction: column;
  }
  .compare-slot {
    min-width: 0;
  }

  /* Result: toolbar + 3D */
  .result-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .rtab {
    flex: 0 0 auto;
    padding: 10px 14px;
    min-height: 44px;
  }
  .ctrl-row {
    padding: 10px;
    gap: 8px;
  }
  .ctrl-row .cont-select {
    width: 100%;
    order: -1;
    flex-wrap: wrap;
  }
  .ctrl-row .divider {
    display: none;
  }
  .seq-row {
    flex-wrap: wrap;
    padding: 8px 10px;
  }
  .explode-slider-wrap {
    flex: 1 1 100%;
    min-width: 0;
    width: 100%;
  }
  .seq-row input[type=range] {
    width: 100%;
    min-height: 28px;
    margin: 6px 0 !important;
  }
  .canvas-wrap-3d {
    display: flex;
    flex-direction: column;
  }
  #weightZonesCard.weight-zones-card {
    position: static;
    margin: 10px 0 0;
    max-width: none;
    align-self: stretch;
  }
  .canvas-3d {
    height: min(420px, 50vh);
  }
  .legend-wrap {
    padding: 10px;
  }
}

/* ---------- 合并导入：无库/售后高亮可编辑行 ---------- */
tr.item-row-merge td {
  background: var(--color-bg-tertiary);
}
tr.item-row-merge--aftersales td:first-child {
  box-shadow: inset 3px 0 0 0 #ea580c;
}
tr.item-row-merge--missing td:first-child {
  box-shadow: inset 3px 0 0 0 #dc2626;
}
.p1-mrg-badge {
  font-size: 10px;
  font-weight: 600;
  color: #9a3412;
  background: #ffedd5;
  border-radius: 4px;
  padding: 1px 6px;
  white-space: nowrap;
}
.p1-mrg-badge--miss {
  color: #991b1b;
  background: #fee2e2;
}
.p1-mrg-inp {
  width: 100%;
  min-width: 0;
  max-width: 7.5rem;
  font-size: 12px;
  padding: 4px 6px;
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--border-radius-sm);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
}
.p1-mrg-inp--name {
  max-width: 12rem;
  flex: 1;
}
.p1-mrg-inp--num {
  max-width: 4.5rem;
  text-align: right;
}
.item-card--merge-m .item-card-line--stack {
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}
.p1-mrg-mstrip {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}
.p1-mrg-mlb {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 10px;
  color: var(--color-text-secondary);
}
.p1-mrg-mlb .p1-mrg-inp {
  max-width: 100%;
}
.p1-mrg-mtag {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-warn);
}
.p1-mrg-mgrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 10px;
  width: 100%;
  font-size: 10px;
  color: var(--color-text-secondary);
}
.p1-mrg-mgrid label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.p1-mrg-mgrid .p1-mrg-inp {
  max-width: 100%;
}
.p1-mrg-mstat {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--color-text-primary);
  margin-top: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .loader-spinner {
    animation: none;
    border-top-color: var(--color-accent);
  }
}