:root {
  --ink: #212121;
  --muted: #667085;
  --line: #d3dce6;
  --surface: #ffffff;
  --panel: #f5f7fb;
  --nav: #252f45;
  --nav-soft: #303c58;
  --accent: #e84368;
  --accent-strong: #c72d53;
  --teal: #007892;
  --blue: #4da0da;
  --warning: #ff5d00;
  --danger: #e31d1c;
  --shadow: 0 16px 40px rgba(37, 47, 69, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: #f5f5f5;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 22px 14px;
  background: var(--nav);
  color: #ffffff;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 8px;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 8px;
  background: var(--accent);
  font-weight: 800;
}

.brand h1,
.topbar h2,
.panel h3,
.panel h4 {
  margin: 0;
}

.brand h1 {
  font-size: 20px;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  margin-top: 8px;
  padding: 0 8px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  color: #f6f9fc;
  background: rgba(255, 255, 255, 0.1);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}

.brand p,
.eyebrow,
.status-card p {
  margin: 4px 0 0;
  color: #d8e2ee;
  font-size: 12px;
}

.nav-list {
  display: grid;
  gap: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 0;
  border-radius: 8px;
  color: #f6f9fc;
  background: transparent;
  text-align: left;
}

.nav-item span {
  width: 24px;
  color: var(--accent);
  font-size: 20px;
}

.nav-item.active,
.nav-item:hover {
  background: var(--nav-soft);
}

.status-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: auto;
  padding: 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
}

.status-dot {
  width: 10px;
  height: 10px;
  margin-top: 4px;
  border-radius: 999px;
  background: #f2bc50;
}

.status-dot.ready {
  background: var(--teal);
}

.main {
  min-width: 0;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.topbar h2 {
  margin-top: 2px;
  font-size: clamp(26px, 3vw, 38px);
  letter-spacing: 0;
}

.title-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.top-version {
  margin-top: 4px;
  border-color: rgba(232, 67, 104, 0.22);
  color: var(--accent);
  background: #fff0f4;
}

.eyebrow {
  color: var(--teal);
  font-weight: 700;
}

.actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.lang-select {
  height: 38px;
  padding: 0 10px;
  border: 1px solid #cdd7dd;
  border-radius: 8px;
  background: #fff;
  color: #14323c;
  font-size: 14px;
  cursor: pointer;
}

.lang-select:focus {
  outline: none;
  border-color: #007892;
  box-shadow: 0 0 0 2px rgba(0, 120, 146, 0.2);
}

button,
.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  white-space: nowrap;
}

.guide-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--nav);
  background: #fff;
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
}

.primary {
  color: #fff;
  background: var(--accent);
}

.primary:hover {
  background: var(--accent-strong);
}

.ghost,
.file-button {
  color: var(--nav);
  background: #fff;
  border-color: var(--line);
}

.compact {
  min-height: 34px;
  padding: 0 12px;
}

#csvInput {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

#projectInput {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(620px, 1fr);
  gap: 18px;
  align-items: start;
}

.config-panel {
  grid-column: 1;
}

.visual-panel {
  grid-column: 2;
  grid-row: 1 / span 2;
  min-height: calc(100vh - 155px);
}

.queue-panel {
  grid-column: 1;
}

.visual-panel {
  display: flex;
  flex-direction: column;
}

.project-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
  box-shadow: none;
}

.project-strip .field {
  margin-bottom: 0;
}

.panel {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-title h3 {
  font-size: 17px;
}

.panel-title span,
#unpackedBadge {
  color: #38515c;
  font-size: 12px;
  font-weight: 700;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

select,
input {
  width: 100%;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  min-height: 16px;
  padding: 0;
}

.container-specs,
.summary-strip,
.metric-list {
  display: grid;
  gap: 10px;
}

.spec-row,
.metric-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid #edf1f4;
  color: var(--muted);
  font-size: 13px;
}

.spec-row strong,
.metric-row strong {
  color: var(--ink);
}

.strategy-block {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.strategy-block h4 {
  font-size: 14px;
}

.strategy-block label {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #344956;
  font-size: 14px;
}

.summary-strip {
  grid-template-columns: repeat(2, 1fr);
  margin-top: 18px;
}

.summary-strip div {
  min-height: 72px;
  padding: 12px;
  border-radius: 8px;
  background: #f5f7fb;
  border-left: 3px solid var(--teal);
}

.validation-box {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.validation-item {
  padding: 10px;
  border-radius: 8px;
  background: #fff0f4;
  color: #9f2747;
  font-size: 13px;
  line-height: 1.45;
}

.validation-item.ok {
  background: #eef9fb;
  color: #00697f;
}

.summary-strip span,
.report-summary span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.summary-strip strong,
.report-summary strong {
  display: block;
  margin-top: 4px;
  font-size: 21px;
}

.visual-panel {
  display: flex;
  min-height: 640px;
  flex-direction: column;
}

.segmented {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.visual-tools {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.visual-tools select {
  width: auto;
  min-width: 108px;
  min-height: 36px;
}

.segmented button {
  min-height: 30px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
}

.segmented button.active {
  color: var(--ink);
  background: #fff;
  box-shadow: 0 1px 5px rgba(25, 32, 39, 0.12);
}

#packingCanvas {
  width: 100%;
  flex: 1;
  min-height: 560px;
  border: 1px solid #d3dce6;
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #f2f6f9);
  touch-action: none;
  cursor: grab;
}

#packingCanvas:active {
  cursor: grabbing;
}

.view3d-hint {
  margin: 6px 2px 0;
  font-size: 12px;
  color: #6a7686;
  letter-spacing: 0.02em;
}

.layer-tools,
.playback-tools,
.move-tools {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.layer-tools .field {
  min-width: 220px;
  margin-bottom: 0;
}

.playback-tools .field {
  min-width: 260px;
  margin-bottom: 0;
}

.playback-tools .floor-limit-field {
  min-width: 190px;
  width: 210px;
}

.layer-tools strong,
.playback-tools strong {
  color: #38515c;
  font-size: 13px;
}

.toggle-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.toggle-line input {
  width: 16px;
}

.move-tools select {
  min-width: 220px;
  width: min(100%, 340px);
}

.nudge-grid {
  display: grid;
  grid-template-columns: repeat(3, 46px);
  gap: 6px;
}

.nudge-grid button {
  min-width: 46px;
  padding: 0;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #3e5360;
  font-size: 12px;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.unpacked-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.insight-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.sequence-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.heatmap-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.sequence-item {
  padding: 10px;
  border-radius: 8px;
  background: #f2f8fb;
  color: #005f74;
  border-left: 3px solid var(--teal);
  font-size: 13px;
  line-height: 1.45;
}

.insight-item {
  padding: 10px;
  border-radius: 8px;
  background: #f2f8fb;
  color: #005f74;
  font-size: 13px;
  line-height: 1.45;
}

.insight-item.warn {
  background: #fff0f4;
  color: #9f2747;
}

.heatmap-item {
  padding: 10px;
  border-radius: 8px;
  background: #f5f7fb;
  color: #3f4f65;
  font-size: 13px;
  line-height: 1.45;
}

.heatmap-detail {
  border-left: 4px solid var(--blue);
}

.heatmap-detail ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

.heatmap-suggestion {
  border-left: 4px solid var(--accent);
  background: #fff0f4;
  color: #7d2039;
}

.heatmap-bar {
  height: 7px;
  margin-top: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #d3dce6;
}

.heatmap-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
}

.unpacked-item {
  padding: 10px;
  border-radius: 8px;
  background: #fff0f4;
  color: #9f2747;
  font-size: 13px;
}

.table-panel,
.report-panel {
  min-height: calc(100vh - 150px);
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  min-width: 1120px;
  border-collapse: collapse;
}

th,
td {
  padding: 10px 8px;
  border-bottom: 1px solid #edf1f4;
  text-align: left;
}

th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

td input,
td select {
  min-height: 34px;
}

tr.invalid-row {
  background: #fff7f6;
}

.icon-button {
  width: 32px;
  min-height: 32px;
  padding: 0;
  color: var(--danger);
  background: #fff;
  border-color: #f0cccc;
}

.report-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
}

.report-summary {
  display: grid;
  gap: 12px;
}

.report-summary div {
  padding: 14px;
  border-radius: 8px;
  background: var(--panel);
}

pre {
  overflow: auto;
  min-height: 520px;
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101821;
  color: #d9e7ee;
  line-height: 1.55;
  white-space: pre-wrap;
}

.guide-panel {
  min-height: calc(100vh - 150px);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.guide-grid article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.guide-grid h4 {
  margin: 0 0 10px;
}

.guide-grid p,
.guide-grid li {
  color: #415461;
  line-height: 1.7;
}

.guide-grid ol {
  margin: 0;
  padding-left: 20px;
}

@media print {
  body {
    background: #fff;
  }

  .sidebar,
  .topbar,
  .view:not(#reportView),
  #reportView .panel-title .actions {
    display: none !important;
  }

  .app-shell {
    display: block;
  }

  .main {
    padding: 0;
  }

  #reportView,
  #reportView.view {
    display: block !important;
  }

  .panel {
    border: 0;
    box-shadow: none;
  }

  pre {
    min-height: 0;
    color: #111;
    background: #fff;
  }
}

@media (max-width: 1180px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 20;
    flex-direction: row;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
  }

  .brand {
    min-width: 190px;
  }

  .nav-list {
    display: flex;
    flex: 1;
    gap: 8px;
  }

  .nav-item {
    justify-content: center;
  }

  .status-card {
    display: none;
  }

  .workspace-grid {
    grid-template-columns: minmax(240px, 300px) minmax(560px, 1fr);
  }

  .config-panel,
  .visual-panel,
  .queue-panel {
    grid-column: auto;
    grid-row: auto;
  }

  .config-panel {
    grid-column: 1;
  }

  .visual-panel {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .queue-panel {
    grid-column: 1;
  }

  .visual-panel {
    min-height: 560px;
  }

  .report-layout {
    grid-template-columns: 1fr;
  }

  .project-strip,
  .guide-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .config-panel,
  .visual-panel,
  .queue-panel {
    grid-column: 1;
    grid-row: auto;
  }
}

@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    padding: 16px;
  }

  .nav-list {
    grid-template-columns: repeat(4, 1fr);
  }

  .nav-item {
    justify-content: center;
    padding: 0 8px;
  }

  .nav-item span {
    display: none;
  }

  .status-card {
    display: none;
  }

  .main {
    padding: 16px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions {
    width: 100%;
  }

  .actions button,
  .file-button {
    flex: 1 1 120px;
  }

  .summary-strip {
    grid-template-columns: 1fr;
  }
}