:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242734;
  --border: #2e3244;
  --text: #e4e6f0;
  --text-dim: #8b8fa3;
  --accent: #6c8cff;
  --accent-dim: #4a62b3;
  --success: #4caf50;
  --warning: #ff9800;
  --error: #f44336;
  --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Layout */
.app-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.app-header h1 { font-size: 20px; font-weight: 600; }
.app-header nav { display: flex; gap: 8px; margin-left: auto; }
.app-header nav button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 6px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13px;
}
.app-header nav button:hover,
.app-header nav button.active {
  background: var(--accent-dim);
  color: #fff;
  border-color: var(--accent);
}

.container { max-width: 1400px; margin: 0 auto; padding: 24px; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-header h2 { font-size: 16px; font-weight: 600; }

/* Status badges */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}
.badge-uploading { background: var(--accent-dim); color: #fff; }
.badge-uploaded { background: var(--accent-dim); color: #fff; }
.badge-ingesting { background: #5c4700; color: #ffb300; }
.badge-review_pending { background: #4a3000; color: var(--warning); }
.badge-complete { background: #1b3a1b; color: var(--success); }
.badge-error { background: #3a1b1b; color: var(--error); }
.badge-approved { background: #1b3a1b; color: var(--success); }
.badge-incomplete { background: #3a1b1b; color: var(--error); }
.badge-pending { background: #5c4700; color: #ffb300; }
.badge-pass { background: #1b3a1b; color: var(--success); }
.badge-fail { background: #3a1b1b; color: var(--error); }

/* Buttons */
.btn {
  padding: 8px 16px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #7d9aff; }
.btn-danger { background: var(--error); color: #fff; }
.btn-danger:hover { background: #ff5252; }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.btn-ghost:hover { background: var(--surface2); color: var(--text); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Forms */
input, select, textarea {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
label { font-size: 13px; color: var(--text-dim); margin-bottom: 4px; display: block; }
.form-group { margin-bottom: 12px; }
.form-row { display: flex; gap: 12px; }
.form-row > * { flex: 1; }

/* Upload zone */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(108, 140, 255, 0.05);
}
.upload-zone p { color: var(--text-dim); margin-top: 8px; font-size: 14px; }

/* Doc type picker */
.doc-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 8px;
}
.doc-type-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--surface2);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
}
.doc-type-checkbox:hover { background: var(--border); }
.doc-type-checkbox input { accent-color: var(--accent); }

/* Table */
table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
th { color: var(--text-dim); font-weight: 500; }
tr:hover { background: var(--surface2); }
tr { cursor: pointer; }

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--surface2);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.3s ease;
  border-radius: 3px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 10px 18px;
  cursor: pointer;
  font-size: 13px;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Chain flow */
.chain-flow {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.chain-link {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.chain-link.approved { border-color: var(--success); }
.chain-arrow {
  text-align: center;
  color: var(--text-dim);
  font-size: 18px;
}
.chain-seller { font-weight: 600; min-width: 200px; }
.chain-buyer { color: var(--text-dim); }
.chain-po { font-size: 12px; color: var(--text-dim); }

/* Review split view */
.review-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  min-height: 600px;
}
.review-image {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.review-image img {
  max-width: 100%;
  height: auto;
}
.review-form {
  overflow-y: auto;
  max-height: 80vh;
}

/* Page thumbnails */
.page-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}
.page-thumb {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s;
}
.page-thumb:hover { border-color: var(--accent); }
.page-thumb img { width: 100%; height: 180px; object-fit: cover; background: #222; }
.page-thumb .page-info {
  padding: 6px 8px;
  font-size: 11px;
  background: var(--surface);
}

/* Verdict */
.verdict {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  padding: 20px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.verdict.complete { background: #1b3a1b; color: var(--success); }
.verdict.incomplete { background: #3a1b1b; color: var(--error); }
.verdict.warning { background: #3a3a1b; color: #ffc107; }
.verdict-detail {
  font-size: 14px;
  font-weight: 400;
  color: #e0a0a0;
}
.verdict.warning .verdict-detail {
  color: #e0d080;
  margin-top: 8px;
  text-align: center;
}

/* Misc */
.text-dim { color: var(--text-dim); }
.text-sm { font-size: 13px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.flex { display: flex; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }
.loading { text-align: center; padding: 40px; color: var(--text-dim); }

/* Quick trace form */
.trace-form {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}
.trace-form .form-group { margin-bottom: 0; flex: 1; }
.trace-form .btn { white-space: nowrap; }

/* Diff summary */
.diff-summary { padding: 12px 0; }
.diff-check {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius);
  margin-bottom: 6px;
  font-size: 13px;
}
.diff-check.pass { background: #1b3a1b; color: var(--success); }
.diff-check.fail { background: #3a1b1b; color: var(--error); }
.diff-details {
  margin-top: 12px;
  padding: 12px;
  background: var(--surface2);
  border-radius: var(--radius);
  font-size: 13px;
}
.diff-details li {
  color: var(--warning);
  margin-bottom: 4px;
  list-style: disc inside;
}

/* Btn small */
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #66bb6a; }