:root {
  --page-width: 210mm;
  --page-height: 297mm;
  --page-margin: 8mm;
  --item-gap: 5mm;
  --invoice-scale: 1;
  --guide-color: rgba(28, 95, 156, 0.38);
  --cut-line-color: #111827;
  color-scheme: light;
  font-family:
    Inter, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: #eef1f4;
  color: #1f2933;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

button,
input,
select {
  font: inherit;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
}

.panel {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  padding: 24px;
  background: #ffffff;
  border-right: 1px solid #d9dee5;
}

.brand h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

.brand p,
.hint,
#status {
  color: #5d6875;
  line-height: 1.55;
}

.brand p {
  margin: 8px 0 22px;
}

.upload {
  display: grid;
  gap: 6px;
  padding: 22px 18px;
  border: 1.5px dashed #7b8fa6;
  border-radius: 8px;
  background: #f8fafc;
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background-color 160ms ease;
}

.upload.dragging {
  border-color: #1967a9;
  background: #eef7ff;
}

.upload input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
}

.upload-title {
  font-weight: 700;
}

.upload-subtitle {
  color: #637083;
  font-size: 14px;
}

.control-group {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.control-group h2 {
  margin: 0;
  font-size: 15px;
  color: #384656;
}

.control-group label {
  display: grid;
  gap: 8px;
  color: #354252;
  font-size: 14px;
}

.control-group label > span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

select,
input[type="range"] {
  width: 100%;
}

select {
  height: 38px;
  padding: 0 10px;
  border: 1px solid #c8d0d9;
  border-radius: 6px;
  background: #ffffff;
}

input[type="range"] {
  accent-color: #1f6fab;
}

.checkbox {
  grid-template-columns: auto 1fr;
  align-items: center;
}

.checkbox input {
  width: 16px;
  height: 16px;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 24px;
}

button {
  min-height: 40px;
  border: 1px solid #b7c1cf;
  border-radius: 6px;
  background: #ffffff;
  color: #243140;
  cursor: pointer;
}

button:first-child {
  border-color: #185f99;
  background: #185f99;
  color: #ffffff;
}

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

.hint {
  margin: 18px 0 0;
  font-size: 13px;
}

.workspace {
  min-width: 0;
  padding: 22px;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin: 0 auto 18px;
  max-width: 1180px;
}

.toolbar strong,
.toolbar span {
  display: block;
}

.toolbar strong {
  font-size: 18px;
}

.preview {
  display: grid;
  justify-content: center;
  gap: 24px;
  padding-bottom: 40px;
}

.preview.empty {
  min-height: calc(100vh - 90px);
  place-items: center;
}

.empty-state {
  display: grid;
  gap: 8px;
  text-align: center;
  color: #697584;
}

.empty-state strong {
  color: #263343;
  font-size: 20px;
}

.sheet {
  position: relative;
  width: var(--sheet-width, var(--page-width));
  height: var(--sheet-height, var(--page-height));
  display: grid;
  gap: var(--item-gap);
  padding: var(--page-margin);
  background: #ffffff;
  box-shadow: 0 10px 32px rgba(26, 38, 52, 0.18);
  overflow: hidden;
  page-break-after: always;
  break-after: page;
}

.sheet.portrait {
  --sheet-width: 210mm;
  --sheet-height: 297mm;
}

.sheet.landscape {
  --sheet-width: 297mm;
  --sheet-height: 210mm;
}

.sheet:last-child {
  page-break-after: auto;
  break-after: auto;
}

.sheet.layout-1 {
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
}

.sheet.layout-2.portrait {
  grid-template-columns: 1fr;
  grid-template-rows: repeat(2, 1fr);
}

.sheet.layout-2.landscape {
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: 1fr;
}

.sheet.layout-4 {
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

.sheet.layout-6.landscape {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

.sheet.layout-6.portrait {
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(3, 1fr);
}

.sheet::before,
.sheet::after {
  content: "";
  position: absolute;
  z-index: 3;
  pointer-events: none;
  display: none;
  border-color: var(--cut-line-color);
}

.sheet.layout-2.portrait::before,
.sheet.layout-4::before {
  display: block;
  left: var(--page-margin);
  right: var(--page-margin);
  top: 50%;
  border-top: 1px dashed var(--cut-line-color);
}

.sheet.layout-2.landscape::after,
.sheet.layout-4::after {
  display: block;
  top: var(--page-margin);
  bottom: var(--page-margin);
  left: 50%;
  border-left: 1px dashed var(--cut-line-color);
}

.sheet.layout-6.landscape::before {
  display: block;
  left: var(--page-margin);
  right: var(--page-margin);
  top: 50%;
  border-top: 1px dashed var(--cut-line-color);
}

.sheet.layout-6.landscape::after {
  display: block;
  top: var(--page-margin);
  right: var(--page-margin);
  bottom: var(--page-margin);
  left: var(--page-margin);
  background-image:
    repeating-linear-gradient(
      to bottom,
      var(--cut-line-color) 0 4px,
      transparent 4px 8px
    ),
    repeating-linear-gradient(
      to bottom,
      var(--cut-line-color) 0 4px,
      transparent 4px 8px
    );
  background-position:
    33.333% 0,
    66.666% 0;
  background-repeat: no-repeat;
  background-size:
    1px 100%,
    1px 100%;
}

.sheet.layout-6.portrait::before {
  display: block;
  top: var(--page-margin);
  right: var(--page-margin);
  bottom: var(--page-margin);
  left: var(--page-margin);
  background-image:
    repeating-linear-gradient(
      to right,
      var(--cut-line-color) 0 4px,
      transparent 4px 8px
    ),
    repeating-linear-gradient(
      to right,
      var(--cut-line-color) 0 4px,
      transparent 4px 8px
    );
  background-position:
    0 33.333%,
    0 66.666%;
  background-repeat: no-repeat;
  background-size:
    100% 1px,
    100% 1px;
}

.sheet.layout-6.portrait::after {
  display: block;
  top: var(--page-margin);
  bottom: var(--page-margin);
  left: 50%;
  border-left: 1px dashed var(--cut-line-color);
}

.preview.hide-crop-marks .sheet::before,
.preview.hide-crop-marks .sheet::after {
  display: none;
}

.invoice-frame {
  margin: 0;
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px dashed var(--guide-color);
  background: #ffffff;
}

.preview.hide-guides .invoice-frame {
  border-color: transparent;
}

.invoice-image {
  width: calc(100% * var(--invoice-scale));
  height: calc(100% * var(--invoice-scale));
  object-fit: contain;
  display: block;
}

.invoice-placeholder {
  border-color: transparent;
}

.loading {
  opacity: 0.65;
}

@media (max-width: 980px) {
  .app {
    grid-template-columns: 1fr;
  }

  .panel {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid #d9dee5;
  }

  .workspace {
    overflow-x: auto;
  }
}

@media print {
  :root {
    background: #ffffff;
  }

  body {
    margin: 0;
    background: #ffffff;
  }

  .panel,
  .toolbar,
  .empty-state {
    display: none !important;
  }

  .app,
  .workspace,
  .preview {
    display: block;
    min-height: 0;
    padding: 0;
    margin: 0;
  }

  .sheet {
    width: var(--sheet-width, var(--page-width));
    height: var(--sheet-height, var(--page-height));
    box-shadow: none;
    margin: 0;
  }

  .sheet.portrait {
    page: portrait-page;
  }

  .sheet.landscape {
    page: landscape-page;
  }
}

@page portrait-page {
  size: A4 portrait;
  margin: 0;
}

@page landscape-page {
  size: A4 landscape;
  margin: 0;
}