/* Challenge Card shared styles. Physical units (in) so the layout is
   correct both on screen (via CSS px-per-inch approximation for preview)
   and at print time (via @page + Playwright page.pdf()). */

:root {
  --panel-width: 5.5in;
  --panel-height: 8.5in;
  --border-width: 0.25in;
  --panel-padding: 0.3in;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  background: #e8e8e8;
  font-family: var(--card-font, 'Helvetica Neue', Arial, sans-serif);
  color: #1a1a1a;
}

/* A single portrait panel -- used standalone for front.html/back.html
   previews, and nested inside .sheet for the combined print layout. */
.panel {
  width: var(--panel-width);
  height: var(--panel-height);
  background: #ffffff;
  border: var(--border-width) solid var(--difficulty-color, #4A90D9);
  padding: var(--panel-padding);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* Set per-panel via inline style by render_card_pdf.py's autofit pass --
     shrinks body-copy font sizes/spacing just enough that content never
     overflows into (or past) the border. 1 = no shrink. See
     references/print-layout-guide.md "Content-fit autofit". */
  --fit-scale: 1;
}

.panel__title {
  font-size: 28pt;
  font-weight: 700;
  text-align: center;
  margin: 0 0 calc(0.15in * var(--fit-scale)) 0;
  line-height: 1.15;
}

.panel__icon {
  align-self: center;
  width: calc(1.1in * var(--fit-scale));
  height: calc(1.1in * var(--fit-scale));
  margin-bottom: calc(0.15in * var(--fit-scale));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: calc(48pt * var(--fit-scale));
}

/* A generated illustration in place of the emoji glyph -- bigger box,
   since these carry real content (labels, marks) that the tiny 1.1in
   emoji box would render illegibly small. This is also the single
   biggest reclaimable block when a panel needs to shrink to fit, so it
   scales with --fit-scale like everything else. */
.panel__icon--image {
  width: calc(2.6in * var(--fit-scale));
  height: auto;
}

.panel__icon--image img {
  display: block;
  width: 100%;
  height: auto;
}

.panel__description {
  font-size: calc(13pt * var(--fit-scale));
  line-height: 1.35;
  margin: 0 0 calc(0.2in * var(--fit-scale)) 0;
  text-align: center;
}

.panel__section-label {
  font-size: calc(11pt * var(--fit-scale));
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #555;
  margin: calc(0.12in * var(--fit-scale)) 0 calc(0.06in * var(--fit-scale)) 0;
}

.panel__steps {
  font-size: calc(12.5pt * var(--fit-scale));
  line-height: 1.32;
  margin: 0 0 calc(0.08in * var(--fit-scale)) 0;
  padding-left: 0.28in;
}

.panel--back .panel__steps { font-size: calc(11pt * var(--fit-scale)); line-height: 1.22; }

.panel__steps li { margin-bottom: calc(0.06in * var(--fit-scale)); }
.panel--back .panel__steps li { margin-bottom: calc(0.03in * var(--fit-scale)); }

.panel__hints {
  font-size: calc(11pt * var(--fit-scale));
  line-height: 1.22;
  font-style: italic;
  color: #444;
  margin: 0 0 calc(0.08in * var(--fit-scale)) 0;
  padding-left: 0.28in;
}

.panel__hints li { margin-bottom: calc(0.03in * var(--fit-scale)); }

.panel__stretch {
  margin-top: auto;
  padding-top: calc(0.15in * var(--fit-scale));
  border-top: 1px dashed #999;
  font-size: calc(11pt * var(--fit-scale));
  font-style: italic;
}

.panel__stretch-label {
  font-weight: 700;
  font-style: normal;
  text-transform: uppercase;
  font-size: calc(9.5pt * var(--fit-scale));
  letter-spacing: 0.03em;
  color: var(--difficulty-color, #4A90D9);
  display: block;
  margin-bottom: calc(0.04in * var(--fit-scale));
}

.panel__code {
  background: #f4f4f4;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: calc(0.08in * var(--fit-scale));
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: calc(7.3pt * var(--fit-scale));
  line-height: 1.22;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0 0 calc(0.08in * var(--fit-scale)) 0;
}

.panel__meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 8.5pt;
  color: #777;
  margin-top: auto;
  padding-top: 0.08in;
  border-top: 1px solid #ddd;
  flex-shrink: 0;
}

.panel__concept-tag {
  background: var(--difficulty-color, #4A90D9);
  color: #fff;
  border-radius: 3px;
  padding: 0.02in 0.08in;
  font-weight: 700;
}

.panel__see-also {
  font-size: calc(9pt * var(--fit-scale));
  color: #666;
  margin-top: calc(0.08in * var(--fit-scale));
}

/* Standalone preview page centering (front.html / back.html only) */
body.preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

/* The combined landscape print sheet: two 5.5in portrait panels
   side by side on one 11in x 8.5in page. */
.sheet {
  width: 11in;
  height: 8.5in;
  display: flex;
  background: #ffffff;
}

.sheet .panel--back {
  transform: rotate(var(--back-rotation-deg, 180deg));
  transform-origin: center;
}

@media screen {
  body.sheet-preview {
    background: #999;
    padding: 0.25in;
  }
  .sheet {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  }
}

@media print {
  @page { size: 11in 8.5in landscape; margin: 0; }
  body { margin: 0; padding: 0; background: white; }
  .sheet { box-shadow: none; }
  .no-print { display: none !important; }
}