:root {
  color-scheme: light;
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  --border: #dbe3ef;
  --ink: #0f172a;
  --muted: #5a6778;
  --panel: #f8fafc;
  --accent: #2463eb;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  color: var(--ink);
  background: #eef2f7;
}

.app-shell {
  height: 100vh;
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
}

.left-sidebar {
  border-right: 1px solid var(--border);
  background: #fff;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
  overflow: hidden;
}

.panel-header h1 {
  margin: 0;
  font-size: 18px;
}

.panel-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.upload-form {
  display: grid;
  gap: 8px;
}

.upload-form input {
  width: 100%;
}

.upload-form button {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 10px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  cursor: pointer;
}

.upload-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  min-height: 20px;
  font-size: 12px;
  color: var(--muted);
}

.stats-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fafc;
  padding: 10px;
}

.stats-primary {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.stats-subtitle {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.section-title {
  margin-top: 2px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: #ff7c35;
  font-weight: 700;
}

.document-list {
  flex: 1;
  min-height: 0;
  display: grid;
  gap: 8px;
  overflow: auto;
}

.doc-item {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 10px;
  padding: 10px;
  text-align: left;
  cursor: pointer;
}

.doc-item.active {
  border-color: var(--accent);
  background: #e9f0ff;
}

.doc-name {
  font-weight: 600;
  font-size: 13px;
  line-height: 1.2;
}

.doc-meta {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.doc-labeled-row {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink);
  cursor: pointer;
}

.doc-labeled-checkbox {
  margin: 0;
}

.main-content {
  display: flex;
  min-width: 0;
  min-height: 0;
  padding: 16px;
  overflow: hidden;
}

.empty-state {
  height: 100%;
  border: 1px dashed #b8c4d8;
  background: white;
  border-radius: 20px;
  display: grid;
  place-items: center;
  color: var(--muted);
}

.labeler-layout {
  flex: 1;
  height: 100%;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  overflow: hidden;
}

.pages-sidebar {
  min-height: 0;
  border-right: 1px solid var(--border);
  background: #f8fafc;
  padding: 12px;
  overflow: auto;
}

.pages-heading {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  font-weight: 700;
}

.pages-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.page-item {
  border: 1px solid #d7deea;
  background: white;
  cursor: pointer;
  padding: 0;
}

.page-item.active {
  border-color: var(--accent);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
}

.page-item img {
  width: 100%;
  display: block;
}

.page-thumb-wrap {
  position: relative;
}

.page-preview-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-preview-box {
  position: absolute;
  box-sizing: border-box;
}

.page-preview-box.contour-unselected {
  border: 1px solid rgba(225, 29, 72, 0.9);
  background: rgba(225, 29, 72, 0.12);
}

.page-preview-box.contour-selected {
  border: 1px solid rgba(5, 150, 105, 0.95);
  background: rgba(16, 185, 129, 0.18);
}

.page-preview-box.yolo {
  border: 1px solid rgba(124, 58, 237, 0.92);
  background: rgba(139, 92, 246, 0.15);
}

.page-preview-box.hybrid-contour {
  border: 1px solid rgba(5, 150, 105, 0.95);
  background: rgba(16, 185, 129, 0.18);
}

.page-preview-box.hybrid-yolo {
  border: 1px solid rgba(124, 58, 237, 0.92);
  background: rgba(139, 92, 246, 0.14);
}

.page-meta {
  padding: 8px;
  font-size: 12px;
  color: var(--muted);
}

.canvas-area {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: #f1f5f9;
}

.canvas-header {
  padding: 14px;
  border-bottom: 1px solid var(--border);
  background: #fff;
  display: flex;
  justify-content: space-between;
  align-items: end;
}

.canvas-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav-button {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.nav-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.canvas-kicker {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: #ff7c35;
  font-weight: 700;
}

.canvas-header h2 {
  margin: 6px 0 0;
  font-size: 20px;
}

.selection-count {
  font-size: 13px;
  color: var(--muted);
}

.canvas-wrap {
  min-height: 0;
  flex: 1;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 16px;
}

.page-surface {
  position: relative;
  margin: 0 auto;
  border: 1px solid #d7deea;
  background: #fff;
  width: min(100%, 1150px);
}

.page-surface > img {
  width: 100%;
  display: block;
}

.contour-layer {
  position: absolute;
  inset: 0;
}

.contour-box {
  position: absolute;
  border: 2px solid rgba(225, 29, 72, 0.85);
  background: rgba(225, 29, 72, 0.08);
  cursor: pointer;
}

.contour-box:hover {
  border-color: rgba(67, 56, 202, 0.85);
  background: rgba(99, 102, 241, 0.09);
}

.contour-box.selected {
  border-color: rgba(5, 150, 105, 0.95);
  background: rgba(16, 185, 129, 0.16);
}

/* ── YOLO view-mode toggle ─────────────────────────────────────────────── */
.view-toggle-group {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.view-toggle-btn {
  border: none;
  border-right: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition:
    background 0.12s,
    color 0.12s;
}

.view-toggle-btn:last-child {
  border-right: none;
}

.view-toggle-btn:hover {
  background: #f1f5f9;
  color: var(--ink);
}

.view-toggle-btn.active {
  background: var(--accent);
  color: #fff;
}

/* ── YOLO status badge ─────────────────────────────────────────────────── */
.yolo-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 20px;
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fbbf24;
}

.yolo-badge.ready {
  background: #d1fae5;
  color: #065f46;
  border-color: #34d399;
}

/* ── YOLO detection boxes ──────────────────────────────────────────────── */
.yolo-box {
  position: absolute;
  border: 2.5px solid rgba(124, 58, 237, var(--conf-alpha, 0.9));
  background: rgba(139, 92, 246, calc(var(--conf-alpha, 0.9) * 0.12));
  pointer-events: none; /* read-only – cannot be clicked */
  box-sizing: border-box;
}

.yolo-conf {
  position: absolute;
  top: -1px;
  left: -1px;
  background: rgba(109, 40, 217, 0.85);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 0 0 4px 0;
  line-height: 1.4;
  pointer-events: none;
}

.hybrid-box {
  position: absolute;
  pointer-events: none;
  box-sizing: border-box;
  border: 2.5px solid rgba(5, 150, 105, 0.92);
  background: rgba(16, 185, 129, 0.12);
}

.hybrid-box.yolo-fallback {
  border-color: rgba(124, 58, 237, 0.92);
  background: rgba(139, 92, 246, 0.12);
}

.hybrid-conf {
  position: absolute;
  top: -1px;
  left: -1px;
  background: rgba(15, 118, 110, 0.9);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 0 0 4px 0;
  line-height: 1.4;
  pointer-events: none;
}

.hybrid-box.yolo-fallback .hybrid-conf {
  background: rgba(109, 40, 217, 0.9);
}

/* OCR-only match — amber/orange, distinct from YOLO purple and contour green */
.hybrid-box.ocr-match {
  border-color: rgba(217, 119, 6, 0.92);
  background: rgba(251, 191, 36, 0.12);
}

.hybrid-box.ocr-match .hybrid-conf {
  background: rgba(180, 83, 9, 0.9);
}

/* Page-list preview dots */
.page-preview-box {
  position: absolute;
  pointer-events: none;
  box-sizing: border-box;
}

.page-preview-box.contour-selected {
  border: 1.5px solid rgba(5, 150, 105, 0.8);
  background: rgba(16, 185, 129, 0.18);
}

.page-preview-box.yolo-dot {
  border: 1.5px solid rgba(124, 58, 237, 0.7);
  background: rgba(139, 92, 246, 0.15);
}

.page-preview-box.hybrid-dot {
  border: 1.5px solid rgba(5, 150, 105, 0.7);
  background: rgba(16, 185, 129, 0.15);
}

.hidden {
  display: none !important;
}

.task-tabs {
  display: flex;
  gap: 0.5rem;
  padding: 0 4px;
  margin-bottom: 0.5rem;
}

.task-tab {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.85rem;
  text-align: center;
}

.task-tab.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}