@import url("https://fonts.googleapis.com/css2?family=Source+Sans+3:ital,wght@0,200..900;1,200..900&display=swap");
/* ---------- Design tokens ---------- */
:root {
  color-scheme: light;
  --color-primary: #0433ab;
  --color-primary-light: #edf2f7;
  --color-secondary: #d90000;
  --color-bg: #f3f2ed;
  --color-panel: #ffffff;
  --color-text: #242424;
  --color-text-inverse: #fff;
  --color-muted: #85847e;
  --color-border: #e4e2da;
  --color-accent: #bd4f31;
  --color-dark: #1f1f1f;
  --radius-sm: 8px;
  --radius-md: 12px;
  --shadow-soft: 0 2px 10px rgb(0 0 0 / 4%);
  --page-width: 210mm;
  --page-height: 297mm;
  --page-margin: 4mm;
  --column-gap: 5mm;
  --receipt-gap: 4mm;
}

body {
  font-family: "Source Sans 3", sans-serif;
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
}

button {
  cursor: pointer;
}
button:focus-visible,
label:focus-visible {
  outline: 3px solid #d9957e;
  outline-offset: 3px;
}

.app-header {
  min-height: 86px;
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--color-panel);
}
.brand,
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
/* .brand__icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: var(--color-primary-light);
  background: var(--color-primary);
  font-size: 25px;
  font-weight: 700;
} */

.brand__img {
  width: 200px;
  display: block;
}

h1 {
  font-size: 1.25rem;
  letter-spacing: 1px;
}
.brand p {
  font-size: 0.875rem;
  color: var(--color-muted);
}
.header-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
  font-size: 0.875rem;
}
.receipt-count {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  background: var(--color-panel);
  font-weight: bold;
  white-space: nowrap;
}
.button {
  border: 1px solid transparent;
  border-radius: 99px;
  padding: 0.5rem 1rem;
  font-weight: bold;
}
.button--secondary {
  background: var(--color-panel);
  color: var(--color-secondary);
  border-color: var(--color-secondary);
  transition: 0.3s ease;
}
.button--secondary:hover {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
}
.button--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transition: 0.3s ease;
}

.button--primary:hover {
  transform: translateY(-3px);
}
.button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.workspace {
  min-height: calc(100vh - 86px);
  display: grid;
  grid-template-columns: minmax(340px, 0.92fr) minmax(0, 1.08fr);
}
.input-panel,
.preview-panel {
  min-width: 0;
  padding: 24px;
  background: var(--color-primary-light);
}

.input-panel {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.section-heading h2 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-primary);
}
.section-heading span {
  color: var(--color-muted);
  font-size: 0.75rem;
  text-align: right;
}
kbd {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
}

.paste-zone {
  min-height: 158px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  cursor: pointer;
  transition:
    border-color 0.18s,
    background 0.18s;
}
.paste-zone.is-dragover {
  border-color: var(--color-primary);
  background: var(--color-bg);
}
.paste-zone__icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 2px solid var(--color-primary);
  border-radius: 0.5rem;
  color: var(--color-primary);
  line-height: 1;
}
.paste-zone strong {
  font-size: 1rem;
  letter-spacing: 1px;
}
.paste-zone > span:not(.paste-zone__icon) {
  max-width: 390px;
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.5;
}
.paste-zone__browse {
  text-decoration: underline;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.receipt-list {
  display: grid;
  gap: 10px;
}
.receipt-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 34px;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}
.receipt-item__number {
  color: var(--color-primary);
  font-size: 12px;
  text-align: center;
  font-weight: bold;
}
.receipt-item__image-wrap {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
  border-radius: 4px;
  background: var(--color-primary-light);
}
.receipt-item__image {
  display: block;
  max-width: 100%;
  max-height: 56px;
  width: auto;
  height: auto;
  object-fit: contain;
  object-position: left center;
}
.receipt-item__remove {
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-muted);
  font-size: 1rem;
  font-weight: bold;
  display: grid;
  place-items: center;
}
.receipt-item__remove:hover {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}
.empty-state {
  display: grid;
  gap: 0.5rem;
  padding: 1.5rem 1rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  text-align: center;
  background: var(--color-panel);
}
.empty-state strong {
  font-size: 1rem;
}
.empty-state span {
  color: var(--color-muted);
  font-size: 0.875rem;
}

.paper-stage {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 6px 0 30px;
}
.print-pages {
  display: grid;
  gap: 18px;
  width: 100%;
  justify-items: center;
}
.paper {
  width: min(100%, 210mm);
  aspect-ratio: 210 / 297;
  padding: var(--page-margin);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
  column-gap: var(--column-gap);
  row-gap: var(--receipt-gap);
  background: var(--color-panel);
  box-shadow: 0 5px 22px rgb(0 0 0 / 9%);
  overflow: hidden;
}
.paper--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 1rem;
  text-align: center;
}
.paper__receipt {
  min-width: 0;
  align-self: start;
  padding-bottom: 0.5rem;
  border-bottom: 2px dotted var(--color-dark);
}
.paper__receipt img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}
.status-message {
  position: fixed;
  left: 50%;
  bottom: 20px;
  z-index: 10;
  transform: translateX(-50%);
  max-width: calc(100vw - 32px);
  padding: 10px 14px;
  border-radius: 99px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: 12px;
  box-shadow: 0 5px 20px rgb(0 0 0 / 15%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.status-message.is-visible {
  opacity: 1;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .app-header {
    align-items: flex-start;
    padding: 16px;
  }
  .workspace {
    grid-template-columns: 1fr;
  }
  .input-panel {
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }
  .input-panel,
  .preview-panel {
    padding: 18px 16px;
  }
  .paper {
    width: min(100%, 560px);
  }
}
@media (max-width: 560px) {
  .app-header {
    flex-direction: column;
  }
  .header-actions {
    width: 100%;
    justify-content: flex-start;
  }
  .section-heading {
    align-items: flex-start;
  }
  .section-heading span {
    max-width: 55%;
  }
}

/* Print layout: each .paper becomes one physical A4 page. */
@page {
  size: A4 portrait;
  margin: 0;
}
@media print {
  :root {
    --page-margin: 5mm;
    --column-gap: 2mm;
    --receipt-gap: 2mm;
  }
  body {
    margin: 0;
    background: #fff;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
  .app-header,
  .input-panel,
  .preview-panel > .section-heading,
  .status-message {
    display: none !important;
  }
  .workspace {
    display: block;
    min-height: 0;
  }
  .preview-panel {
    padding: 0;
    background: #fff;
  }
  .paper-stage,
  .print-pages {
    display: block;
    padding: 0;
    width: 100%;
  }
  .paper {
    width: 210mm;
    height: 297mm;
    aspect-ratio: auto;
    margin: 0;
    padding: var(--page-margin);
    box-shadow: none;
    overflow: hidden;
    break-after: page;
    page-break-after: always;
  }
  .paper:last-child {
    break-after: auto;
    page-break-after: auto;
  }
  .paper--empty {
    display: none;
  }
}