:root {
  color-scheme: light;
  --paper: #f3efe5;
  --ink: #1c252b;
  --border: rgba(28, 37, 43, 0.14);
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  min-width: 100%;
  min-height: 100%;
  margin: 0;
  background: #efe7d9;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

.preview-page {
  width: 100vw;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at top left, rgba(184, 92, 56, 0.18), transparent 32rem),
    linear-gradient(135deg, #f8f1df 0%, var(--paper) 48%, #e8ddd0 100%);
}

.preview-topbar {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.70);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 10px;
  border-radius: 8px;
  background: rgba(28, 37, 43, 0.92);
  color: #fff;
  font-size: 1.15rem;
  font-weight: 800;
  text-transform: uppercase;
}

.preview-title {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.2;
}

.preview-title strong { font-size: 0.95rem; }

.preview-title span {
  color: rgba(28, 37, 43, 0.62);
  font-size: 0.82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.top-menu {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 28px;
  padding: 3px;
  border: 1px solid rgba(28, 37, 43, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 8px 20px rgba(28, 37, 43, 0.10);
}

.top-menu-link {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 10px;
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.top-menu-link:hover,
.top-menu-link.active {
  background: var(--ink);
  color: #fff;
}

.top-menu-icon {
  width: 28px;
  justify-content: center;
  padding: 0;
}

.top-menu-link svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.preview-error {
  margin: 10px 14px 0;
  padding: 10px 12px;
  border: 1px solid rgba(184, 92, 56, 0.34);
  border-radius: 8px;
  background: rgba(184, 92, 56, 0.10);
  color: #7a321c;
  font-weight: 700;
}

.preview-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0;
  width: 100vw;
}

.preview-pane {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.54);
}

.preview-pane:last-child { border-right: 0; }

.preview-pane-header {
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.74);
  font-weight: 800;
}

.preview-pane-header span {
  color: rgba(28, 37, 43, 0.62);
  font-size: 0.78rem;
  font-weight: 700;
}

.preview-analysis-strip {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.58);
}

.preview-analysis-strip span {
  color: rgba(28, 37, 43, 0.62);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.preview-analysis-strip strong {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 850;
  white-space: nowrap;
}

.gray-swatch {
  width: 18px;
  height: 18px;
  display: inline-block;
  border: 1px solid rgba(28, 37, 43, 0.28);
  border-radius: 6px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.38);
}

.preview-document {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 16px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.preview-document-toned {
  background:
    linear-gradient(rgba(255, 255, 255, 0.20), rgba(255, 255, 255, 0.20)),
    var(--page-average-gray, #fff);
}

.average-gray-page {
  --page-average-gray: #fff;
  width: min(100%, 980px);
  padding: 12px;
  border: 1px solid rgba(28, 37, 43, 0.16);
  border-radius: 8px;
  background: var(--page-average-gray);
  box-shadow: 0 14px 34px rgba(28, 37, 43, 0.16);
}

.average-gray-page img {
  width: 100%;
  opacity: 0.82;
  mix-blend-mode: multiply;
}

.preview-stage {
  position: relative;
  width: 100%;
}

.preview-stage img {
  width: 100%;
}

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

.overlay-box {
  position: absolute;
  border: 2px solid rgba(24, 91, 122, 0.92);
  border-radius: 4px;
  background: rgba(24, 91, 122, 0.10);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.72);
}

.overlay-box.region {
  border-width: 3px;
  border-style: dashed;
  z-index: 1;
}

.overlay-box.layout-block {
  z-index: 2;
}

.overlay-box.layout-child-block {
  z-index: 3;
  border-width: 2px;
  border-style: solid;
  border-color: rgba(20, 124, 104, 0.92);
  background: rgba(20, 124, 104, 0.08);
}

.overlay-label {
  position: absolute;
  left: -2px;
  top: -22px;
  max-width: 220px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(24, 91, 122, 0.94);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 850;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.overlay-box.layout-block-contact {
  border-color: rgba(17, 116, 96, 0.92);
  background: rgba(17, 116, 96, 0.10);
}

.overlay-box.layout-block-contact .overlay-label {
  background: rgba(17, 116, 96, 0.94);
}

.overlay-box.layout-child-block .overlay-label {
  background: rgba(20, 124, 104, 0.94);
}

.overlay-box.layout-block-address,
.overlay-box.layout-block-sender {
  border-color: rgba(41, 87, 138, 0.92);
  background: rgba(41, 87, 138, 0.10);
}

.overlay-box.layout-block-address .overlay-label,
.overlay-box.layout-block-sender .overlay-label {
  background: rgba(41, 87, 138, 0.94);
}

.overlay-box.layout-block-metadata {
  border-color: rgba(130, 92, 20, 0.92);
  background: rgba(130, 92, 20, 0.12);
}

.overlay-box.layout-block-metadata .overlay-label {
  background: rgba(130, 92, 20, 0.94);
}

.overlay-box.layout-block-subject {
  border-color: rgba(158, 48, 78, 0.94);
  background: rgba(158, 48, 78, 0.12);
}

.overlay-box.layout-block-subject .overlay-label {
  background: rgba(158, 48, 78, 0.95);
}

.overlay-box.layout-block-noise {
  border-color: rgba(90, 98, 105, 0.68);
  background: rgba(90, 98, 105, 0.08);
}

.overlay-box.layout-block-noise .overlay-label {
  background: rgba(90, 98, 105, 0.92);
}

.overlay-box.region.document-header {
  border-color: rgba(106, 66, 166, 0.88);
  background: rgba(106, 66, 166, 0.08);
}

.overlay-box.region.document-header .overlay-label {
  background: rgba(106, 66, 166, 0.94);
}

.overlay-box.region.document-body {
  border-color: rgba(44, 124, 82, 0.88);
  background: rgba(44, 124, 82, 0.06);
}

.overlay-box.region.document-body .overlay-label {
  background: rgba(44, 124, 82, 0.94);
}

.overlay-box.region.document-footer {
  border-color: rgba(144, 78, 30, 0.88);
  background: rgba(144, 78, 30, 0.08);
}

.overlay-box.region.document-footer .overlay-label {
  background: rgba(144, 78, 30, 0.94);
}

.preview-document img {
  width: min(100%, 980px);
  height: auto;
  display: block;
  border: 1px solid rgba(28, 37, 43, 0.16);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(28, 37, 43, 0.16);
}

.average-gray-page img {
  width: 100%;
  box-shadow: none;
}

.preview-empty {
  width: 100%;
  min-height: 300px;
  display: grid;
  place-items: center;
  border: 1px dashed rgba(28, 37, 43, 0.22);
  border-radius: 8px;
  color: rgba(28, 37, 43, 0.62);
  font-weight: 700;
  background: rgba(255, 255, 255, 0.56);
}

@media (max-width: 900px) {
  .preview-topbar {
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .top-menu { margin-left: 0; }
  .preview-grid { grid-template-columns: 1fr; }
  .preview-pane {
    min-height: 70vh;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
}