:root {
  --paper-width: 215.9mm;
  --paper-height: 279.4mm;
  --page-margin: 6.35mm;
  --gutter: 4mm;
  --cut-size: 70mm;
  --face-size: 58mm;
  --face-inset: 6mm;
  --ink: #18212f;
  --muted: #5f6c7b;
  --line: #d7dde6;
  --panel: #ffffff;
  --panel-soft: #fbfcfe;
  --paper: #f4f7fb;
  --header: #ffffff;
  --accent: #0b7a75;
  --accent-dark: #075f5b;
  --accent-soft: #e8f3f2;
  --danger-soft: #f4e8e8;
  --danger-ink: #8a2020;
  --warning-border: #f0b429;
  --warning-bg: #fff8dc;
  --warning-ink: #4c3b05;
  --stage-check: #dce3ec;
  --stage-bg: #edf1f7;
  --shadow: rgb(24 33 47 / 18%);
  --guide-face: #1266d6;
  --guide-center: #d12727;
  color-scheme: light;
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
}

:root[data-theme="dark"] {
  --ink: #edf2f7;
  --muted: #a8b3c2;
  --line: #354151;
  --panel: #151a20;
  --panel-soft: #10151c;
  --paper: #0d1117;
  --header: #12171e;
  --accent: #2aa198;
  --accent-dark: #43b7ae;
  --accent-soft: #123531;
  --danger-soft: #3a1d23;
  --danger-ink: #ffb3b3;
  --warning-border: #d49a25;
  --warning-bg: #2d2614;
  --warning-ink: #f4df9a;
  --stage-check: #222a35;
  --stage-bg: #121820;
  --shadow: rgb(0 0 0 / 42%);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.app-header {
  align-items: center;
  background: var(--header);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 18px;
  justify-content: space-between;
  padding: 20px clamp(16px, 4vw, 40px);
}

.header-copy {
  min-width: 0;
}

.app-header h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.25rem);
}

.app-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.theme-field {
  align-items: center;
  color: var(--muted);
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
  font-weight: 700;
}

.theme-field select {
  appearance: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%) calc(100% - 17px) 50% / 6px 6px
      no-repeat,
    linear-gradient(135deg, var(--muted) 50%, transparent 50%) calc(100% - 12px) 50% / 6px 6px
      no-repeat,
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-weight: 700;
  min-height: 40px;
  padding: 8px 30px 8px 10px;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 24px;
  padding: 24px clamp(12px, 3vw, 36px) 40px;
}

.controls {
  align-self: start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.step {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

.step:first-child {
  border-top: 0;
  padding-top: 0;
}

.step h2,
.preview-panel h2 {
  font-size: 1.05rem;
  margin: 0 0 10px;
}

.step p,
.hint,
.warning,
#status {
  color: var(--muted);
  margin: 8px 0 0;
}

.primary-button,
.secondary-button,
.danger-button {
  min-height: 44px;
  padding: 10px 14px;
}

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

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

.secondary-button {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.danger-button {
  background: var(--danger-soft);
  color: var(--danger-ink);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.drop-zone {
  border: 2px dashed var(--line);
  border-radius: 8px;
  padding: 16px;
  background: var(--panel-soft);
}

.drop-zone.is-dragging {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.file-name {
  font-weight: 700;
  word-break: break-word;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented span {
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  text-align: center;
  font-weight: 700;
}

.segmented input:checked + span {
  background: var(--ink);
  border-color: var(--ink);
  color: #ffffff;
}

.number-field {
  display: flex;
  align-items: center;
  gap: 10px;
}

.number-field input {
  background: var(--panel);
  width: 74px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  padding: 8px 10px;
}

.warning {
  border-left: 4px solid var(--warning-border);
  color: var(--warning-ink);
  background: var(--warning-bg);
  padding: 10px 12px;
}

.preview-panel {
  min-width: 0;
}

.preview-heading {
  align-items: end;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.sheet-stage {
  overflow: auto;
  padding: 18px;
  background:
    linear-gradient(45deg, var(--stage-check) 25%, transparent 25%),
    linear-gradient(-45deg, var(--stage-check) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--stage-check) 75%),
    linear-gradient(-45deg, transparent 75%, var(--stage-check) 75%);
  background-color: var(--stage-bg);
  background-position:
    0 0,
    0 8px,
    8px -8px,
    -8px 0;
  background-size: 16px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.sheet,
.calibration-page {
  background: #ffffff;
  box-shadow: 0 10px 30px var(--shadow);
  color: #000000;
}

.sheet {
  align-items: center;
  display: grid;
  height: var(--paper-height);
  justify-items: center;
  margin: 0 auto;
  padding: var(--page-margin);
  width: var(--paper-width);
}

.sheet-grid {
  display: grid;
  gap: var(--gutter);
  grid-template-columns: repeat(var(--sheet-columns), var(--cut-size));
}

.button-art {
  height: var(--cut-size);
  position: relative;
  width: var(--cut-size);
}

.button-artwork {
  align-items: center;
  background: #ffffff;
  border-radius: 50%;
  display: flex;
  height: 100%;
  justify-content: center;
  overflow: hidden;
  width: 100%;
}

.button-artwork img {
  display: block;
  height: 100%;
  object-fit: fill;
  width: 100%;
}

.art-placeholder {
  color: #6a7280;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.button-guides {
  inset: 0;
  pointer-events: none;
  position: absolute;
}

.cut-guide {
  border: 0.35mm solid #000000;
  border-radius: 50%;
  inset: 0;
  position: absolute;
}

.face-guide {
  border: 0.35mm dashed var(--guide-face);
  border-radius: 50%;
  height: var(--face-size);
  inset: var(--face-inset);
  pointer-events: none;
  position: absolute;
  width: var(--face-size);
}

.crosshair {
  height: 10mm;
  left: 50%;
  pointer-events: none;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 10mm;
}

.crosshair::before,
.crosshair::after {
  background: var(--guide-center);
  content: "";
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
}

.crosshair::before {
  height: 0.35mm;
  width: 10mm;
}

.crosshair::after {
  height: 10mm;
  width: 0.35mm;
}

.calibration-page {
  display: none;
  height: var(--paper-height);
  padding: 12mm;
  width: var(--paper-width);
}

.calibration-page h2 {
  font-size: 16pt;
  margin: 0 0 4mm;
}

.calibration-page p {
  font-size: 10pt;
  margin: 0 0 8mm;
}

.calibration-box {
  border: 0.35mm solid #000000;
  height: 50mm;
  width: 50mm;
}

.calibration-row {
  align-items: flex-start;
  display: flex;
  gap: 18mm;
}

.small-box {
  border: 0.35mm solid #000000;
  height: 10mm;
  width: 10mm;
}

.calibration-label {
  font-size: 9pt;
  margin-top: 2mm;
}

.ruler {
  height: 18mm;
  margin-top: 14mm;
  position: relative;
  width: 50mm;
}

.ruler-line {
  border-top: 0.35mm solid #000000;
  left: 0;
  position: absolute;
  top: 5mm;
  width: 50mm;
}

.tick {
  border-left: 0.35mm solid #000000;
  height: 5mm;
  position: absolute;
  top: 2.5mm;
}

.tick span {
  font-size: 8pt;
  left: 50%;
  position: absolute;
  top: 5mm;
  transform: translateX(-50%);
}

.tick-0 {
  left: 0;
}

.tick-10 {
  left: 10mm;
}

.tick-20 {
  left: 20mm;
}

.tick-30 {
  left: 30mm;
}

.tick-40 {
  left: 40mm;
}

.tick-50 {
  left: 50mm;
}

@media (max-width: 860px) {
  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .preview-heading {
    align-items: start;
    flex-direction: column;
  }
}

@page {
  margin: 0;
  size: letter;
}

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

  .app-header,
  .controls,
  .preview-heading,
  .no-print {
    display: none !important;
  }

  .app-shell,
  .preview-panel,
  .sheet-stage {
    background: transparent;
    border: 0;
    display: block;
    margin: 0;
    overflow: visible;
    padding: 0;
  }

  .sheet,
  .calibration-page {
    box-shadow: none;
    margin: 0;
  }

  body[data-print-mode="sheet"] .sheet {
    display: grid;
  }

  body[data-print-mode="sheet"] .calibration-page {
    display: none;
  }

  body[data-print-mode="calibration"] .sheet {
    display: none;
  }

  body[data-print-mode="calibration"] .calibration-page {
    display: block;
  }

  .button-guides,
  .guide,
  .crosshair,
  .cut-guide,
  .face-guide,
  .alignment-mark {
    display: none !important;
  }

  .button-art::before,
  .button-art::after {
    content: none !important;
    display: none !important;
  }
}