/* skyscrapers: rules used only by the skyscrapers pages (loaded after base.css). */
/* Skyscrapers board: a real CSS grid (n+2) x (n+2), unlike the other
   puzzle boards' float-grid technique - a grid is a natural fit here
   since a row/column of edge-clue cells needs to sit flush around all
   four sides of the board, not just the fillable n x n interior. Grid
   `gap` is fine to use on E-Ink per this project's compatibility notes
   (only flexbox `gap` needs the margin-based fallback); the 1px gap on
   top of a solid background acts as the grid line between cells. Each
   cell's height is set inline by JS to match its computed square width,
   since CSS `aspect-ratio` is unreliable on E-Ink browsers. */
#skyscrapers-board {
  display: grid;
  gap: 1px;
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  box-sizing: border-box;
  border: 3px solid var(--border);
  background: var(--border);
  overflow: hidden;
}

.skyscrapers-cell {
  background: var(--square-light);
  box-sizing: border-box;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.skyscrapers-corner {
  background: transparent;
}

.skyscrapers-clue-cell {
  background: transparent;
}

.skyscrapers-clue-value {
  font-weight: 700;
  line-height: 1;
  font-size: 0.9rem;
  font-size: clamp(0.7rem, 3vw, 1.1rem);
}

.skyscrapers-clue-ok .skyscrapers-clue-value {
  text-decoration: underline;
}

.skyscrapers-clue-violated .skyscrapers-clue-value {
  outline: 2px dashed var(--border);
  outline-offset: 2px;
  padding: 0 0.15em;
}

.skyscrapers-cell-board {
  cursor: pointer;
  border: none;
  padding: 0;
  font: inherit;
  color: inherit;
}

.skyscrapers-cell-board.selected {
  outline: 3px solid var(--border);
  outline-offset: -3px;
}

.skyscrapers-cell-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.1rem;
  font-size: clamp(0.9rem, 3.5vw, 1.4rem);
  line-height: 1;
  pointer-events: none;
}

.skyscrapers-cell-conflict {
  outline: 2px dashed var(--border);
  outline-offset: -2px;
}

.skyscrapers-numpad {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 540px;
  margin: 0.6rem auto 0;
}

/* 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. */
.skyscrapers-numpad > * {
  margin: 0 0.4rem 0.4rem 0;
}

.skyscrapers-numpad > *:last-child {
  margin-right: 0;
}

.skyscrapers-numpad-btn {
  width: 44px;
  height: 44px;
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  box-sizing: border-box;
}

/* A tiny ascending skyline drawn with stacked background rectangles,
   anchored to the bottom of the icon box - no raw SVG needed, the same
   "one element, layered backgrounds" trick as .kakuro-icon's diagonal
   split, just with four bars instead of two triangles. */
.skyscrapers-icon {
  display: inline-block;
  width: 1.4em;
  height: 1.4em;
  border: 2px solid var(--border);
  box-sizing: border-box;
  background-repeat: no-repeat;
  background-image:
    linear-gradient(var(--border), var(--border)),
    linear-gradient(var(--border), var(--border)),
    linear-gradient(var(--border), var(--border)),
    linear-gradient(var(--border), var(--border));
  background-size: 16% 32%, 16% 52%, 16% 42%, 16% 78%;
  background-position: 8% 100%, 34% 100%, 60% 100%, 84% 100%;
}

@media print {
  /* Skyscrapers draws its grid lines as a black board showing through
       1px gaps, which would print the whole clue frame black. On paper:
       white everywhere, each fillable cell outlined instead (the outlines
       of two neighbours share the same 1px gap, so lines stay 1px). */
  body.printable-puzzle #skyscrapers-board {
      background: #fff !important;
      border: none !important;
    }
    body.printable-puzzle .skyscrapers-cell {
      background: #fff !important;
      border-radius: 0 !important;
    }
    body.printable-puzzle #skyscrapers-board .skyscrapers-cell-board {
      outline: 1px solid #000 !important;
      outline-offset: 0 !important;
    }
  }