:root {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-border: #e0e3e8;
  --color-text: #1a1d24;
  --color-text-muted: #5b6270;
  --color-primary: #2457c9;
  --color-primary-hover: #1c46a3;
  --color-primary-tint: #eaf0fd;
  --color-success: #1a7f37;
  --color-success-tint: #e7f6ec;
  --color-error: #c1121f;
  --color-error-tint: #fdecec;
  --color-warning: #9a6700;
  --color-warning-tint: #fff6dd;
  --color-queued: #5b6270;
  --color-queued-tint: #eef0f3;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header.app-header {
  margin-bottom: 1.25rem;
}

header.app-header h1 {
  font-size: 1.5rem;
  margin: 0 0 0.25rem;
  letter-spacing: -0.01em;
}

header.app-header p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* --- Privacy banner --- */
.privacy-banner {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--color-primary-tint);
  border: 1px solid #cfe0fb;
  color: #1a3a80;
  border-radius: var(--radius-md);
  padding: 0.7rem 1rem;
  font-size: 0.88rem;
  margin-bottom: 1.5rem;
}

.privacy-banner svg { flex: none; color: var(--color-primary); }

/* --- Card sections --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  font-size: 1.05rem;
  margin: 0 0 0.85rem;
}

/* --- Dropzone --- */
.dropzone {
  border: 2px dashed #c3c9d3;
  border-radius: var(--radius-md);
  padding: 2.25rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
  display: block;
}

.dropzone:hover,
.dropzone:focus-within {
  border-color: var(--color-primary);
  background: var(--color-primary-tint);
}

.dropzone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-tint);
}

.dropzone svg {
  color: var(--color-text-muted);
  margin-bottom: 0.6rem;
}

.dropzone .dz-title {
  font-weight: 600;
  font-size: 1rem;
}

.dropzone .dz-title .link {
  color: var(--color-primary);
  text-decoration: underline;
}

.dropzone .dz-hint {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.dropzone input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* --- Per-file status list --- */
.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.file-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.file-row .file-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9rem;
}

.file-row .file-detail {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  white-space: nowrap;
}

.status-pill.queued { background: var(--color-queued-tint); color: var(--color-queued); }
.status-pill.processing { background: var(--color-primary-tint); color: var(--color-primary); }
.status-pill.done { background: var(--color-success-tint); color: var(--color-success); }
.status-pill.error { background: var(--color-error-tint); color: var(--color-error); }

.spinner {
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* --- Summary stats --- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.stat-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  text-align: center;
}

.stat-card .stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
}

.stat-card .stat-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.stat-card.mismatches .stat-value { color: var(--color-warning); }
.stat-card.anomalies .stat-value { color: var(--color-warning); }
.stat-card.errors .stat-value { color: var(--color-error); }

details.disclosure {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  margin-top: 0.6rem;
  font-size: 0.85rem;
}

details.disclosure summary {
  cursor: pointer;
  font-weight: 600;
}

details.disclosure ul {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
}

details.disclosure li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  margin-bottom: 0.35rem;
  word-break: break-word;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

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

.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.preview-table-wrap {
  overflow-x: auto;
  margin-top: 0.75rem;
}

table.preview-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.8rem;
}

table.preview-table th,
table.preview-table td {
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.6rem;
  text-align: left;
  white-space: nowrap;
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
}

table.preview-table th {
  background: var(--color-bg);
  font-weight: 600;
}

.empty-state {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

@media (max-width: 620px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .page { padding: 1.25rem 0.85rem 3rem; }
}