:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #17202a;
  --muted: #6b7788;
  --line: #d8e0ea;
  --blue: #2563eb;
  --blue-soft: #eef5ff;
  --green: #168a5a;
  --amber: #b76e00;
  --red: #c2413b;
  --shadow: 0 14px 34px rgba(23, 32, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button {
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

textarea,
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 11px 12px;
}

textarea {
  resize: vertical;
  line-height: 1.6;
}

.app {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0;
}

.header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 18px;
}

.header h1 {
  margin: 0;
  font-size: 30px;
}

.header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 120px);
  gap: 10px;
}

.stats div {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  box-shadow: var(--shadow);
}

.stats span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.stats strong {
  display: block;
  margin-top: 4px;
  font-size: 22px;
}

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

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

.panel + .panel {
  margin-top: 18px;
}

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

.panel-head h2 {
  margin: 0;
  font-size: 18px;
}

.panel-head span {
  color: var(--muted);
  font-size: 13px;
}

.drop-zone {
  position: relative;
  min-height: 310px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 2px dashed #9db3cc;
  border-radius: 8px;
  background: #fbfdff;
  cursor: pointer;
  outline: none;
}

.drop-zone:focus,
.drop-zone.dragging {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.drop-zone input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-idle {
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
  padding: 28px;
}

.drop-idle strong {
  font-size: 24px;
}

.drop-idle span {
  color: var(--muted);
}

.drop-zone img {
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  background: #fff;
}

.judge-panel {
  display: grid;
  gap: 12px;
}

.source-panel {
  margin-top: 18px;
}

.source-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.source-actions button {
  background: #17202a;
}

.source-actions button:hover {
  background: #253140;
}

.source-status {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.source-status a {
  color: var(--blue);
  font-weight: 700;
  white-space: nowrap;
}

.badge {
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 13px;
  font-weight: 800;
  background: #eef2f7;
  color: var(--muted);
}

.badge.go {
  background: #dcfce7;
  color: var(--green);
}

.badge.watch {
  background: #fff4d6;
  color: var(--amber);
}

.badge.wait,
.badge.idle {
  background: #eef5ff;
  color: var(--blue);
}

.badge.stop {
  background: #fee2e2;
  color: var(--red);
}

.empty-result {
  min-height: 112px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 8px;
}

.result-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #f8fafc;
}

.result-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 4px;
}

.result-card strong {
  display: block;
  font-size: 18px;
  margin-bottom: 12px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.result-grid div {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}

.result-grid b {
  font-size: 20px;
}

#reasonText {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.positive {
  color: var(--green);
}

.negative {
  color: var(--red);
}

.search {
  max-width: 240px;
}

.table-wrap {
  overflow: auto;
  max-height: 420px;
  min-height: 180px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}

th,
td {
  padding: 11px 8px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  position: sticky;
  top: 0;
  background: #fff;
  color: var(--muted);
  font-size: 12px;
}

.price {
  font-weight: 800;
}

.sku-cell {
  min-width: 260px;
}

.muted-cell {
  color: var(--muted);
  white-space: nowrap;
}

.quality {
  font-weight: 800;
  white-space: nowrap;
}

.quality-good {
  color: var(--green);
}

.quality-warn {
  color: var(--amber);
}

.quality-bad {
  color: var(--red);
}

.fresh-time {
  color: var(--green);
  white-space: nowrap;
}

.stale-time {
  color: var(--red);
  font-weight: 700;
  white-space: nowrap;
}

.empty-row,
.empty-history {
  min-height: 100px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 8px;
}

.history-list {
  display: grid;
  gap: 10px;
}

.history-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.history-item span {
  color: var(--muted);
  white-space: nowrap;
}

.hidden {
  display: none;
}

@media (max-width: 900px) {
  .header,
  .history-item {
    flex-direction: column;
    align-items: stretch;
  }

  .workbench,
  .stats {
    grid-template-columns: 1fr;
  }

  .search {
    max-width: none;
  }

  .result-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .app {
    width: min(100vw - 20px, 1180px);
    padding: 16px 0;
  }

  .drop-zone {
    min-height: 240px;
  }

  .drop-idle strong {
    font-size: 20px;
  }
}