/* klondike: rules used only by the klondike pages (loaded after base.css). */
/* Klondike board: stock/waste and foundations in a row above seven
   cascading tableau columns - the same overlap-via-negative-margin
   layout as FreeCell's cascade, since a Klondike column is likewise a
   variable-height stack rather than a fixed board shape. Suits are
   drawn like FreeCell's: red suits hollow, black suits filled, so the
   red/black colour reads on a monochrome screen. Face-down cards get a
   hatched back instead of a plain color, the same structural, not
   color-based, convention used for player fills elsewhere in this
   app (e.g. Dots and Boxes). */
.klondike-top-row {
  display: flex;
  justify-content: space-between;
max-width: 900px;
  margin: 0 auto 0.6rem;
  flex-wrap: wrap;
}

/* Flexbox `gap` fallback: margin-based spacing instead, since some E-Ink browsers (Tolino confirmed) don't support `gap` on a flex container and render items with zero space between them. */
.klondike-top-row > * {
  margin: 0 1rem 1rem 0;
}

.klondike-top-row > *:last-child {
  margin-right: 0;
}

.klondike-stockwaste,
.klondike-foundations {
  display: flex;
}

/* Flexbox `gap` fallback: margin-based spacing instead, since some E-Ink browsers (Tolino confirmed) don't support `gap` on a flex container and render items with zero space between them. */
.klondike-stockwaste > *, .klondike-foundations > * {
  margin: 0 0.3rem 0.3rem 0;
}

.klondike-stockwaste > *:last-child, .klondike-foundations > *:last-child {
  margin-right: 0;
}

.klondike-cell {
  width: 2.6rem;
  height: 3.6rem;
  border: var(--border-width) solid var(--border);
  border-radius: 4px;
  background: #fff;
  font-weight: 700;
  font-size: 1rem;
  box-sizing: border-box;
  cursor: pointer;
}

.klondike-foundation-empty {
  color: var(--muted);
  font-weight: 400;
}

.klondike-card-selected {
  outline: 3px solid var(--border);
  outline-offset: 1px;
}

.klondike-columns {
  display: flex;
max-width: 900px;
  margin: 0 auto;
  align-items: flex-start;
}

/* Flexbox `gap` fallback: margin-based spacing instead, since some E-Ink browsers (Tolino confirmed) don't support `gap` on a flex container and render items with zero space between them. */
.klondike-columns > * {
  margin: 0 0.4rem 0.4rem 0;
}

.klondike-columns > *:last-child {
  margin-right: 0;
}

.klondike-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* Height and overlap (margin-top) are set in JS, like FreeCell's
   cards (CardFaces.layoutColumns in card-faces.js). */
.klondike-card {
  position: relative;
  width: 100%;
  border: var(--border-width) solid var(--border);
  border-radius: 4px;
  background: #fff;
  box-sizing: border-box;
  display: flex;
  align-items: flex-start;
  padding: 0.2rem 0 0 0.3rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.8rem;
  font-size: clamp(0.65rem, 2.4vw, 0.95rem);
  cursor: pointer;
}

.klondike-card:first-child {
  margin-top: 0;
}

.klondike-card-back {
  background: repeating-linear-gradient(45deg, #fff, #fff 4px, var(--border) 4px, var(--border) 5px);
}

.klondike-empty-slot {
  display: block;
  width: 100%;
  border: var(--border-width) dashed var(--muted);
  border-radius: 4px;
  box-sizing: border-box;
}

.klondike-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.8em;
  height: 1.4em;
  border: 2px solid var(--border);
  border-radius: 3px;
  box-sizing: border-box;
  font-size: 0.65rem;
  font-weight: 700;
}

/* Hint (task 185): the card to move and the place for it. */
.klondike-hint {
  outline: 3px dashed var(--text);
  outline-offset: -3px;
}