:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --line: #d8dee6;
  --text: #17202a;
  --muted: #687385;
  --accent: #0f766e;
  --accent-strong: #0b5f59;
  --danger: #c2410c;
  --amber: #b7791f;
  --focus: #2563eb;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 980px;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}

button,
input {
  font: inherit;
}

.app-shell {
  height: 100vh;
  display: grid;
  grid-template-rows: 56px 1fr;
}

.topbar {
  display: grid;
  grid-template-columns: 220px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-light);
}

.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: cover;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 30px;
  border-radius: 6px;
  color: #fff;
  background: var(--danger);
  font-size: 13px;
  letter-spacing: 0;
}

.toolbar,
.right-tools {
  display: flex;
  align-items: center;
  gap: 6px;
}

.right-tools {
  justify-content: flex-end;
}

.icon-button,
.primary-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  min-width: 38px;
  height: 38px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  padding: 0 10px;
  white-space: nowrap;
}

.icon-button:hover,
.primary-button:hover {
  border-color: var(--accent);
}

.icon-button.active {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
}

.primary-button {
  min-width: 92px;
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
  padding: 0 14px;
  font-weight: 700;
}

.primary-button:hover {
  background: var(--accent-strong);
}

.file-button {
  position: relative;
  overflow: hidden;
}

.file-button input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.zoom-label {
  min-width: 54px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: 180px 1fr 220px;
}

.sidebar,
.properties {
  min-height: 0;
  overflow: auto;
  border-right: 1px solid var(--line);
  background: #fbfcfd;
}

.properties {
  border-right: 0;
  border-left: 1px solid var(--line);
  padding: 14px;
}

.sidebar-title,
.panel-title {
  padding: 14px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.thumb-list {
  display: grid;
  gap: 10px;
  padding: 0 12px 16px;
}

.thumb {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  padding: 8px;
  cursor: pointer;
}

.thumb.active {
  border-color: var(--focus);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.thumb canvas {
  width: 100%;
  display: block;
  background: #fff;
}

.thumb span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.document-area {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  padding: 28px 0;
  background:
    linear-gradient(45deg, rgba(0, 0, 0, 0.035) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0, 0, 0, 0.035) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(0, 0, 0, 0.035) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(0, 0, 0, 0.035) 75%);
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
}

.empty-state {
  width: min(520px, calc(100% - 48px));
  margin: 80px auto;
  padding: 36px;
  display: grid;
  justify-items: center;
  gap: 12px;
  color: var(--muted);
  border: 1px dashed #aab4c1;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  cursor: pointer;
}

.empty-state svg {
  width: 42px;
  height: 42px;
  color: var(--accent);
}

.empty-state strong {
  color: var(--text);
  font-size: 18px;
}

.page-stack {
  display: grid;
  justify-content: center;
  gap: 24px;
}

.page-wrap {
  position: relative;
  background: #fff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
}

.pdf-canvas,
.text-edit-layer,
.overlay-layer {
  display: block;
}

.text-edit-layer,
.overlay-layer {
  position: absolute;
  inset: 0;
}

.page-wrap.pen-active .overlay-layer {
  cursor: crosshair;
}

.page-wrap.pen-active .text-edit-layer {
  pointer-events: none;
}

.page-wrap.eraser-active .overlay-layer,
.page-wrap.eraser-active .overlay-item,
.page-wrap.eraser-active .pdf-text-block.changed {
  cursor: crosshair;
}

.text-edit-layer {
  pointer-events: none;
  z-index: 2;
}

.overlay-layer {
  pointer-events: auto;
  z-index: 3;
}

.page-wrap.edit-text-active .text-edit-layer {
  pointer-events: auto;
}

.page-wrap.text-click-active .text-edit-layer {
  pointer-events: auto;
}

.page-wrap.edit-text-active .overlay-layer {
  pointer-events: none;
}

.pdf-text-block {
  position: absolute;
  overflow: hidden;
  padding: 0 2px;
  color: transparent;
  border: 0;
  outline: 1px dashed transparent;
  outline-offset: 1px;
  line-height: 1;
  white-space: pre;
  cursor: text;
}

.pdf-text-cover {
  position: absolute;
  pointer-events: none;
}

.page-wrap.edit-text-active .pdf-text-block {
  outline-color: rgba(15, 118, 110, 0.65);
  color: transparent;
  background: transparent;
}

.pdf-text-block.changed {
  outline-color: rgba(194, 65, 12, 0.85);
  color: #1f2937;
}

.page-wrap.edit-text-active .pdf-text-block.editing,
.page-wrap.edit-text-active .pdf-text-block.changed {
  color: #1f2937;
}

.page-wrap.text-click-active .pdf-text-block:hover {
  cursor: text;
}

.overlay-item {
  position: absolute;
  min-width: 18px;
  min-height: 18px;
  border: 1px solid transparent;
  cursor: move;
  user-select: none;
}

.overlay-item.selected {
  border-color: var(--focus);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.18);
}

.eraser-item {
  border-color: transparent;
  /* z-index removed to allow normal stacking */
}

.eraser-item.selected {
  border-color: rgba(15, 118, 110, 0.7);
}

.stroke-item {
  pointer-events: none;
}

.stroke-item svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}

.text-item {
  padding: 2px 4px;
  white-space: pre-wrap;
  outline: none;
  cursor: text;
  user-select: text;
}

.text-item.is-empty::before {
  content: attr(data-placeholder);
  color: rgba(104, 115, 133, 0.72);
  pointer-events: none;
}

.box-item {
  border: 2px solid currentColor;
  background: transparent;
}

.check-item {
  display: grid;
  place-items: center;
  font-weight: 900;
}

.image-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.resize-handle {
  position: absolute;
  right: -7px;
  bottom: -7px;
  width: 14px;
  height: 14px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--focus);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.28);
  cursor: nwse-resize;
  padding: 0;
}

.properties label {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
}

.property-field {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
}

.property-control-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.background-control-row {
  grid-template-columns: minmax(0, 1fr) 40px auto;
}

.color-control-row {
  grid-template-columns: minmax(0, 1fr) 40px auto;
}

.properties input[type="number"],
.properties input[type="color"],
.properties select {
  width: 100%;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
  background: #fff;
}

.property-button {
  min-width: 58px;
  height: 36px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  padding: 0 12px;
}

.property-button:hover {
  border-color: var(--accent);
}

.primary-property-button {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
  font-weight: 700;
}

.primary-property-button:hover {
  background: var(--accent-strong);
}

.icon-property-button {
  min-width: 40px;
  width: 40px;
  padding: 0;
}

.status-text {
  margin-top: 18px;
  padding: 10px;
  border-left: 3px solid var(--amber);
  background: #fff7ed;
  color: #7c2d12;
  font-size: 13px;
  line-height: 1.45;
}

svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
}

.modal-content {
  background: #fff;
  padding: 24px;
  border-radius: 8px;
  width: 400px;
  max-width: 90%;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.modal-content h3 {
  margin-top: 0;
  margin-bottom: 15px;
  color: #1f2937;
}

/* 取色模式 - 全局光标和视觉反馈 */
body.color-picking,
body.color-picking * {
  cursor: crosshair !important;
}

body.color-picking .page-wrap {
  outline: 2px dashed var(--focus);
  outline-offset: -2px;
}

body.color-picking .status-bar {
  background: #fef3c7;
  color: #92400e;
  font-weight: 600;
}

/* 覆盖 Pickr 颜色按钮的样式，增加边框 */
.pcr-button {
  border: 1px solid #d1d5db !important;
  border-radius: 4px !important;
}