/* DogCatTrace 冷面学术样式：中性色、单列阅读、等宽数字。 */

:root {
  --ink: #16181c;
  --ink-soft: #4a5058;
  --ink-faint: #767d87;
  --line: #d8dbe0;
  --line-soft: #e8eaee;
  --paper: #ffffff;
  --paper-soft: #f7f8fa;
  --paper-tint: #eef1f5;
  --accent: #2b4a6f;
  --accent-soft: #e6edf5;
  --warn: #8a4b2a;
  --radius: 3px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper-soft);
  color: var(--ink);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 28px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.product-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  letter-spacing: 0.01em;
}

.product-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font: 600 11px/1 var(--mono);
  letter-spacing: 0.06em;
}

.topbar-actions { display: flex; align-items: center; gap: 18px; }

.topbar-status { color: var(--ink-faint); font-size: 13px; font-variant-numeric: tabular-nums; }

.topbar-github { display: inline-flex; color: var(--ink-faint); }
.topbar-github:hover { color: var(--accent); }

.main-content {
  max-width: 1080px;
  margin: 0 auto;
  padding: 34px 28px 72px;
}

.page-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-header h1 { margin: 0; font-size: 22px; font-weight: 600; letter-spacing: -0.01em; }

.privacy-badge {
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-faint);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.lede { margin: 18px 0 0; color: var(--ink-soft); max-width: 68ch; }

.panel-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 26px 0 12px;
}

.panel-toolbar strong { font-size: 14px; font-weight: 600; letter-spacing: 0.01em; }

.challenge-list { display: grid; gap: 14px; }

.challenge-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.challenge-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
}

.challenge-header strong { font-weight: 600; }
.challenge-header span { color: var(--ink-faint); font-variant-numeric: tabular-nums; }
.challenge-header button { margin-left: auto; }

.challenge-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }

.challenge-columns > div { padding: 12px 14px; min-width: 0; }
.challenge-columns > div + div { border-left: 1px solid var(--line-soft); }

.challenge-columns label {
  display: block;
  margin-bottom: 6px;
  color: var(--ink-faint);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.challenge-columns pre {
  margin: 0;
  padding: 10px 12px;
  max-height: 168px;
  overflow: auto;
  background: var(--paper-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font: 12px/1.65 var(--mono);
  white-space: pre-wrap;
  word-break: break-word;
}

.challenge-columns textarea {
  width: 100%;
  height: 168px;
  padding: 10px 12px;
  resize: vertical;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font: 12px/1.65 var(--mono);
}

.challenge-columns textarea:focus,
input:focus,
select:focus { outline: 2px solid var(--accent-soft); outline-offset: 0; border-color: var(--accent); }

button {
  padding: 6px 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: var(--ink-faint); color: var(--ink); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.button.primary {
  padding: 9px 22px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-size: 14px;
}

.button.primary:hover:not(:disabled) { background: #223c5c; border-color: #223c5c; color: #fff; }
.button.secondary { font-size: 12px; }

.action-row { display: flex; justify-content: flex-end; align-items: center; gap: 10px; margin-top: 18px; }

.message {
  margin-top: 16px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  font-size: 13px;
}

.message.error { border-color: #d9bfae; background: #fdf6f1; color: var(--warn); }
.message.working { color: var(--ink-soft); }
.message.success { border-color: #bcd0c2; background: #f3f8f4; color: #2f5b3c; }

.result-panel { margin-top: 26px; }

.result-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.result-summary > div { padding: 14px 16px; background: var(--paper); }
.result-summary span { display: block; color: var(--ink-faint); font-size: 12px; letter-spacing: 0.02em; }
.result-summary strong { display: block; margin-top: 5px; font-size: 17px; font-weight: 600; font-variant-numeric: tabular-nums; }

.diagnostics { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }

.diagnostic {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-faint);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.diagnostic.accepted { border-color: #c6d3c9; color: #2f5b3c; }
.diagnostic.rejected { border-color: #dcc6b8; color: var(--warn); }

.table-wrap {
  margin-top: 16px;
  overflow-x: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }

thead th {
  padding: 10px 14px;
  background: var(--paper-tint);
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-align: left;
  white-space: nowrap;
}

tbody td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: middle;
  font-variant-numeric: tabular-nums;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr.winner { background: var(--accent-soft); }

.probability-cell { display: flex; align-items: center; gap: 10px; }

.probability-cell span {
  flex: 1 1 auto;
  min-width: 68px;
  height: 6px;
  background: var(--paper-tint);
  border-radius: 999px;
  overflow: hidden;
}

.probability-cell i { display: block; height: 100%; background: var(--accent); border-radius: 999px; }
.probability-cell strong { flex: 0 0 auto; min-width: 54px; font-weight: 600; }

.result-guidance {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink-faint);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: 13px;
}

.result-guidance p { margin: 0; }
.result-guidance p + p { margin-top: 6px; }

.inventory-panel { margin-top: 20px; padding: 16px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); }
.form-heading { margin-bottom: 10px; font-size: 14px; }
.fingerprint-list { display: flex; flex-wrap: wrap; gap: 8px; }

.fingerprint-item {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-soft);
  font-size: 13px;
}

.empty-inventory { color: var(--ink-faint); font-size: 13px; }

.notice {
  margin: 20px 0 0;
  padding: 12px 16px;
  border: 1px solid #dcc6b8;
  border-radius: var(--radius);
  background: #fdf6f1;
  color: var(--warn);
  font-size: 13px;
}

footer.page-footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 12px;
}

@media (max-width: 760px) {
  .main-content { padding: 22px 16px 56px; }
  .topbar { padding: 12px 16px; }
  .challenge-columns { grid-template-columns: 1fr; }
  .challenge-columns > div + div { border-left: none; border-top: 1px solid var(--line-soft); }
}