:root {
  color-scheme: light;
  --page: #f4f6f3;
  --panel: #ffffff;
  --ink: #24302f;
  --muted: #687471;
  --line: #d8ded9;
  --accent: #2f6f61;
  --accent-strong: #25584e;
  --accent-soft: #e7f1ed;
  --warning: #9b5d26;
  --shadow: 0 18px 45px rgba(38, 49, 45, 0.12);
  --wide-sheet-width: 11;
  --wide-sheet-height: 8.5;
  --tall-sheet-width: 8.5;
  --tall-sheet-height: 11;
  --card-safe-margin: clamp(18px, 5%, 42px);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 40px;
  background: var(--page);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="text"],
input[type="number"] {
  border: 1px solid var(--line);
  border-radius: 8px;
}

button {
  min-height: 38px;
  padding: 8px 12px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

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

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

label {
  display: block;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 650;
}

select,
input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 10px 11px;
  background: #fff;
  color: var(--ink);
}

input[type="color"] {
  width: 100%;
  min-height: 40px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.app-header {
  position: absolute;
  top: 40px;
  left: max(40px, calc((100% - 1800px) / 2));
  width: min(780px, calc(100% - 80px));
  margin: 0;
  padding: 0;
}

.app-header > div {
  display: flex;
  align-items: center;
  gap: 28px;
}

.app-header h1 {
  margin: 0;
  flex: 0 0 auto;
}

.app-header h1 img {
  display: block;
  width: min(220px, 56vw);
  height: auto;
}

.app-header p {
  margin: 0;
  color: #111;
  font-size: 1.4rem;
  line-height: 1.45;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(680px, 780px) minmax(0, 1fr);
  gap: 30px;
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
  padding: 0;
}

.control-panel {
  position: sticky;
  top: 24px;
  align-self: start;
  width: min(100%, 550px);
  margin-top: 264px;
  min-height: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #edf2ee;
}

.controls-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
}

.controls-column {
  display: contents;
}

.controls-column:first-child .panel-section:nth-child(1) {
  grid-row: 1;
}

.controls-column:nth-child(2) .panel-section:nth-child(1) {
  grid-row: 2;
}

.controls-column:first-child .panel-section:nth-child(2) {
  grid-row: 3;
}

.controls-column:first-child .panel-section:nth-child(3) {
  grid-row: 4;
}

.panel-section {
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.panel-section h2 {
  margin: 0 0 14px;
  font-size: 1rem;
}

.panel-section > * + label,
.field-grid {
  margin-top: 12px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.field-grid > div:first-child:nth-last-child(3) {
  grid-column: span 2;
}

.preview-selector-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 auto 10px;
}

.preview-selector-row.format-wide {
  width: min(100%, 920px);
}

.preview-selector-row.format-tall {
  width: min(100%, 640px);
  margin-left: max(0px, calc((100% - 920px) / 2));
  margin-right: auto;
}

.preview-selector-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 4px 6px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
}

.preview-selector-actions[hidden] {
  visibility: hidden;
}

.preview-selector-actions button {
  display: grid;
  width: 32px;
  height: 32px;
  min-height: 32px;
  place-items: center;
  padding: 0;
  font-size: 1.35rem;
  line-height: 1;
}

.print-actions {
  margin-top: 12px;
}

.print-actions button {
  width: 100%;
}

.print-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

.preview-stage {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.preview-toolbar {
  width: min(100%, 900px);
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.preview-instruction {
  display: flex;
  flex-wrap: wrap;
  gap: 0 4px;
  margin-bottom: 3px;
}

.preview-toolbar strong {
  display: block;
  color: var(--ink);
}

#previewTypeLabel {
  color: var(--ink);
  font-weight: 700;
}

.card-preview {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #b7c0ba;
  border-radius: 4px;
  box-shadow: var(--shadow);
}

.card-preview::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: 5;
  border-left: 1px dashed #4f5b55;
  pointer-events: none;
}

.preview-card-face {
  position: relative;
  min-width: 0;
  overflow: hidden;
  padding: 0;
  background: #fff;
}

.preview-face-label {
  position: absolute;
  top: 10px;
  left: 12px;
  z-index: 2;
  padding: 4px 7px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
}

.card-preview.format-wide {
  width: min(100%, 920px);
  aspect-ratio: var(--wide-sheet-width) / calc(var(--wide-sheet-height) / 2);
}

.card-preview.format-tall {
  width: min(100%, 640px);
  aspect-ratio: var(--tall-sheet-width) / calc(var(--tall-sheet-height) / 2);
  margin-left: max(0px, calc((100% - 920px) / 2));
  margin-right: auto;
}

.preview-image-frame {
  position: relative;
  grid-area: image;
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  background: #fff;
}

.preview-image-frame::after {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(255, 255, 255, 0.62);
}

.has-image .preview-image-frame::after {
  display: none;
}

.has-image .preview-image-frame {
  background: transparent;
}

.preview-image-frame img {
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.card-content {
  position: relative;
  min-width: 0;
  overflow: hidden;
  background: #fff;
  cursor: pointer;
  user-select: none;
  transition: background-color 120ms ease;
}

.card-content:hover {
  background-color: #fbfcfb;
}

.preview-message,
.preview-meta {
  max-width: 100%;
  overflow-wrap: normal;
  word-break: normal;
  hyphens: none;
}

.preview-message {
  margin: 0;
  color: currentColor;
  text-align: center;
}

.preview-meta {
  margin: 0;
  color: currentColor;
}

.align-right {
  text-align: right;
}

.template-image .preview-image-frame img {
  width: 100%;
  height: 100%;
}

.fold-guide-heading {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

.fold-guide-heading strong {
  color: var(--ink);
}

.sheet-preview-wrap {
  width: min(100%, 710px);
  margin: 24px auto 0 max(0px, calc((100% - 920px) / 2));
}

.sheet-preview {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  overflow: hidden;
  margin: 0;
  background: #fff;
  border: 1px solid #b7c0ba;
  box-shadow: var(--shadow);
}

.sheet-preview.format-wide {
  width: min(100%, 690px);
  aspect-ratio: var(--wide-sheet-width) / var(--wide-sheet-height);
}

.sheet-preview.format-tall {
  width: min(100%, 480px);
  aspect-ratio: var(--tall-sheet-width) / var(--tall-sheet-height);
}

.sheet-preview::before,
.sheet-preview::after,
.print-sheet::before,
.print-sheet::after {
  content: "";
  position: absolute;
  z-index: 5;
  pointer-events: none;
}

.sheet-preview::before,
.print-sheet::before {
  top: 0;
  bottom: 0;
  left: 50%;
  border-left: 1px dashed #4f5b55;
}

.sheet-preview::after,
.print-sheet::after {
  top: 50%;
  right: 0;
  left: 0;
  border-top: 1px dashed #4f5b55;
}

.sheet-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid #d7ddd9;
  background: #fff;
}

.print-sheet {
  display: none;
}

.print-sheet {
  position: relative;
}

.print-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid #d7ddd9;
  background: #fff;
}

.print-front {
  display: grid;
  grid-template-areas: "image";
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}

.print-front img {
  grid-area: image;
  align-self: center;
  justify-self: center;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.print-front.template-image img {
  width: 100%;
  height: 100%;
}

.print-front-text {
  grid-area: image;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  padding: 32px;
}

.print-front h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2.4rem);
  line-height: 1.1;
  text-align: center;
  word-break: normal;
  hyphens: none;
}

.print-meta {
  min-height: 1.2em;
  margin: 0;
  font-size: 17px;
}

.print-notes {
  padding: 0;
}

.notes-lines {
  position: absolute;
  top: var(--notes-top-margin, 23.529%);
  right: var(--notes-horizontal-margin, 13.636%);
  bottom: var(--notes-bottom-margin, 17.647%);
  left: var(--notes-horizontal-margin, 13.636%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.notes-lines span {
  display: block;
  width: 100%;
  border-top: var(--notes-line-width, 1.2px) solid var(--notes-line-color, #b9b9b9);
}

.print-inside {
  display: grid;
  place-items: center;
  padding: var(--card-safe-margin);
  text-align: center;
}

.sheet-preview .print-inside,
.print-sheet .print-inside,
.card-preview .print-inside {
  padding: 0;
}

.four-fold-message-box {
  position: absolute;
  top: var(--greeting-center-y, 50%);
  left: var(--greeting-center-x, 50%);
  width: var(--greeting-text-box-width, 82%);
  transform: translate(-50%, -50%);
}

.print-inside p {
  max-width: 90%;
  margin: 0 0 16px;
  line-height: 1.3;
  word-break: normal;
  hyphens: none;
}

.four-fold-message-box p {
  max-width: 100%;
}

.four-fold-greeting {
  font-family: var(--greeting-font-family, Georgia, serif);
  font-size: var(--greeting-font-size, 42px);
  line-height: var(--greeting-line-height, 1.3);
}

.print-inside .print-meta {
  width: 100%;
  margin: 0 0 18px;
  font-size: var(--greeting-meta-font-size, 17px);
  color: currentColor;
  text-align: left;
}

.print-inside .align-right {
  margin: 18px 0 0;
  text-align: right;
}

.print-back {
  display: grid;
  place-items: center;
  padding: 42px;
}

.print-back img {
  width: min(62%, 260px);
  max-height: 58%;
  object-fit: contain;
}

.sheet-preview .print-front,
.sheet-preview .print-back {
  transform: rotate(180deg);
}

.sheet-preview .print-front,
.print-sheet .print-front {
  grid-column: 1;
  grid-row: 1;
}

.sheet-preview .print-notes,
.print-sheet .print-notes {
  grid-column: 1;
  grid-row: 2;
}

.sheet-preview .print-inside,
.print-sheet .print-inside {
  grid-column: 2;
  grid-row: 2;
}

.sheet-preview .print-back,
.print-sheet .print-back {
  grid-column: 2;
  grid-row: 1;
}

@media (max-width: 1180px) {
  body {
    padding: 24px;
  }

  .app-header {
    position: static;
    width: 100%;
    margin: 0 auto 22px;
  }

  .app-shell {
    display: block;
  }

  .control-panel {
    position: static;
    width: 100%;
    min-height: 0;
    margin: 0 0 20px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
  }
}

@media (max-width: 760px) {
  .controls-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  body {
    padding: 18px;
  }

  .app-header > div {
    display: block;
  }

  .app-header p {
    margin-top: 10px;
  }

  .card-preview.format-tall {
    width: min(100%, 640px);
  }

  .field-grid {
    grid-template-columns: 1fr;
  }

  .field-grid > div:first-child:nth-last-child(3) {
    grid-column: auto;
  }
}

@page wide-card {
  size: letter landscape;
  margin: 0;
}

@page tall-card {
  size: letter portrait;
  margin: 0;
}

@media print {
  html,
  body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background: #fff;
  }

  body {
    display: grid;
    min-height: 100vh;
    place-items: center;
  }

  * {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .app-header,
  .app-shell,
  .control-panel,
  .preview-toolbar,
  .sheet-preview-wrap {
    display: none;
  }

  .print-sheet {
    position: relative;
    display: grid;
    margin: 0;
    overflow: hidden;
    background: #fff;
    box-shadow: none;
  }

  .print-sheet.format-wide {
    page: wide-card;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    width: 11in;
    height: 8.5in;
  }

  .print-sheet.format-tall {
    page: tall-card;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    width: 8.5in;
    height: 11in;
  }

  .print-sheet .print-front,
  .print-sheet .print-back {
    transform: rotate(180deg);
  }

  .print-panel {
    border-color: #d8d8d8;
    break-inside: avoid;
    page-break-inside: avoid;
  }
}