:root {
  --bg: #f4f6f8; --surface: #fff; --text: #1b2430; --muted: #5d6877; --line: #dde2e8;
  --accent: #1f6f5c; --accent-text: #fff; --warn: #8a5a00; --warn-bg: #fff3d6; --bad: #b3261e; --bad-bg: #fdecea;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11161c; --surface: #1a212a; --text: #e8edf3; --muted: #9aa6b4; --line: #2b3541;
    --accent: #37a58a; --accent-text: #08130f; --warn: #f2c35b; --warn-bg: #3a2f14; --bad: #ff8a80; --bad-bg: #3a1c1a; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { overflow-x: hidden; }
html, body { margin: 0; padding: 0; min-height: 100%; background: var(--bg); color: var(--text); }
body { overflow-x: clip; font: 16px/1.45 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif; -webkit-text-size-adjust: 100%; }
h1, h2, p, dl, dd, dt { margin: 0; }
h1 { font-size: 1.12rem; line-height: 1.3; }
h2 { font-size: .95rem; margin-bottom: 8px; }
button, input { font: inherit; color: inherit; }
button { min-height: 44px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); cursor: pointer; white-space: nowrap; }
button:disabled { opacity: .55; cursor: progress; }
button:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.primary { color: var(--accent-text); background: var(--accent); border-color: var(--accent); font-weight: 650; }
.ghost { background: transparent; min-height: 44px; padding: 6px 10px; }
.muted { color: var(--muted); }
.small { font-size: .78rem; }
.error { color: var(--bad); background: var(--bad-bg); border-radius: 10px; padding: 10px 12px; }

#app { max-width: 680px; margin: 0 auto; min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }
.screen { display: flex; flex-direction: column; flex: 1; min-height: 0; }
#login { padding: 12vh 20px 24px; gap: 8px; }
#login-form { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
label { font-size: .9rem; color: var(--muted); margin-top: 6px; }
input[type="text"], input[type="password"] { width: 100%; min-height: 48px; padding: 10px 14px; font-size: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }

.bar { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: calc(8px + env(safe-area-inset-top)) 14px 8px; background: var(--bg); border-bottom: 1px solid var(--line); }
.bar-text { min-width: 0; flex: 1; }
.bar-text p { margin-top: 3px; overflow-wrap: anywhere; }
.tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; padding: 10px 12px 4px; }
.tabs button { min-height: 46px; font-weight: 600; }
.tabs button.selected, .filter-row button[aria-pressed="true"] { color: var(--accent-text); background: var(--accent); border-color: var(--accent); }
.search-form { display: flex; gap: 8px; padding: 8px 12px; }
#query { flex: 1; min-width: 0; }
.filters { display: flex; flex-direction: column; gap: 7px; padding: 0 12px 8px; }
.filter-row { display: flex; gap: 7px; overflow-x: auto; padding: 2px 1px 5px; scrollbar-width: thin; }
.filter-row button { min-height: 44px; padding: 6px 12px; font-size: .87rem; }
.results { display: flex; flex-direction: column; gap: 9px; padding: 8px 12px calc(20px + env(safe-area-inset-bottom)); }
.data-note { font-size: .78rem; color: var(--muted); overflow-wrap: anywhere; }
.warning { padding: 9px 11px; border-radius: 10px; background: var(--warn-bg); color: var(--warn); font-size: .84rem; }
.empty-state { padding: 12px; border-radius: 12px; background: var(--surface); color: var(--muted); }
.summary { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.summary-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.metric { min-width: 0; padding: 8px; border-radius: 10px; background: var(--bg); }
.metric dt { color: var(--muted); font-size: .72rem; }
.metric dd { margin-top: 2px; font-weight: 700; font-size: .97rem; overflow-wrap: anywhere; }
.result-card { display: flex; align-items: flex-start; gap: 11px; padding: 10px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.inventory-choice { width: 100%; text-align: left; white-space: normal; }
.inventory-navigation { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.image-wrap { flex: none; width: 82px; height: 82px; display: grid; place-items: center; overflow: hidden; border-radius: 10px; background: var(--bg); }
.product-image { width: 100%; height: 100%; object-fit: contain; }
.image-fallback { padding: 4px; color: var(--muted); font-size: .65rem; text-align: center; }
.card-info { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.card-title { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; }
.model { overflow-wrap: anywhere; font-size: 1rem; }
.rank-badge { color: var(--accent); font-size: .78rem; font-weight: 700; }
.product-name { color: var(--muted); font-size: .82rem; overflow-wrap: anywhere; }
.metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; margin-top: 3px; }
.metrics .metric { padding: 5px 7px; }
.metrics .metric dd { font-size: .86rem; }
.color-sales { list-style: none; display: flex; flex-wrap: wrap; gap: 5px 10px; padding: 4px 0 0; color: var(--muted); font-size: .76rem; }
.stock-value { font-size: .9rem; font-weight: 700; margin-top: 5px; overflow-wrap: anywhere; }
.loading { padding: 14px 4px; }

@media (min-width: 560px) {
  #login { padding-top: 16vh; }
  .summary-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .image-wrap { width: 96px; height: 96px; }
}
@media (max-width: 350px) {
  .result-card { gap: 8px; padding: 8px; }
  .image-wrap { width: 68px; height: 68px; }
  .metrics { grid-template-columns: 1fr 1fr; }
}