/* ---------------------------------------------------------------------------
   Tile Match  —  /games/tilematch/

   Loaded only on that page (build.py:PAGE_CSS).  Everything here is measured
   in the tile art's own pixels: web/images/mahjong-tile.png is 128x178, and
   the whole board is drawn at that scale and then scaled once, as a unit, by
   a transform on .tm-board.  So one number changes the board's size and
   nothing inside it has to know.

   The tile face is a light cream in both themes -- it is a printed object, not
   a surface of the page -- so its ink is dark either way and none of the
   palette custom properties are used inside a tile.
   --------------------------------------------------------------------------- */

.tm { margin: 2rem 0; }

.tm-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin-bottom: .75rem;
}

.tm-btn {
  font: inherit;
  font-size: .95rem;
  padding: .4rem .85rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.tm-btn:hover:not([disabled]) { background: var(--bg-tint); border-color: var(--border-strong); }
.tm-btn[disabled] { opacity: .45; cursor: default; }
/* Accent means "on", not "hovered" -- the same split the vocab chips use, so
   the one toggle in this bar cannot be mistaken for a button under the mouse. */
.tm-btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent-deep);
}

.tm-count { margin-left: auto; color: var(--text-muted); font-size: .9rem; }

/* Reserved height, so a match message appearing does not shove the board. */
.tm-status {
  min-height: 2.6em;
  margin: 0 0 .5rem;
  padding: .4rem .6rem;
  background: var(--bg-tint);
  border-left: 3px solid var(--accent);
  border-radius: 3px;
  font-size: .95rem;
}
.tm-status .tm-form { font-weight: 700; }
.tm-status .tm-han { font-family: var(--font-han); }
.tm-status .tm-mnem { color: var(--text-muted); }

/* The board escapes the measure column to the full viewport: the tiles carry
   words, not symbols, so how big the board may be *is* how legible it is.
   Wider than the viewport on a narrow screen, it scrolls rather than shrinking
   the lettering past reading. */
.tm-scroll {
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

/* .tm-stage carries the *scaled* size so the page lays out around it;
   .tm-board is always full size and is scaled into that box. */
.tm-stage { position: relative; }
.tm-board {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

.tm-tile {
  position: absolute;
  width: 128px;
  height: 178px;
  padding: 0;
  border: 0;
  background: url("/images/mahjong-tile.png") no-repeat center / 100% 100%;
  cursor: pointer;
  font: inherit;
  color: #23201a;
  -webkit-tap-highlight-color: transparent;
  /* A no-op filter by default so the two effects always compose: the per-layer
     shadow is set on this property from JS, and the dim appends to it.  The
     tile art has transparent corners, so darkening has to be a filter on the
     element -- an overlay rectangle would paint outside the tile's shape. */
  --tm-shadow: opacity(1);
  filter: var(--tm-shadow);
}

/* Highlight free tiles: everything that cannot be played recedes.  Applied to
   the whole tile rather than just its face, so a blocked tile with an open
   side does not go on flashing that side at the player. */
.tm-tile.tm-dim { filter: var(--tm-shadow) brightness(.78) saturate(.85); }
.tm-tile:focus-visible { outline: none; }
.tm-tile.tm-out { display: none; }

/* The face: the flat top of the art, which sits up and to the right of the
   drawn thickness.  Measured off the png. */
.tm-face {
  position: absolute;
  top: 2px; left: 19px; right: 3px; bottom: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  text-align: center;
  line-height: 1.15;
  overflow: hidden;
}

.tm-en { font-weight: 600; }
.tm-en .tm-en2 { font-weight: 500; color: #6a6152; }
.tm-latin { font-weight: 700; letter-spacing: .01em; }
.tm-hanbig { font-family: var(--font-han); font-size: 60px; line-height: 1; }

/* Selection, hint and refusal all paint on the face only, so the tile's drawn
   thickness never lights up as if it were part of the top. */
.tm-tile::after {
  content: "";
  position: absolute;
  top: 2px; left: 19px; right: 3px; bottom: 18px;
  pointer-events: none;
  background: transparent;
}
.tm-tile.tm-sel::after,
.tm-tile:focus-visible::after { background: rgba(255, 232, 0, .45); box-shadow: inset 0 0 0 3px #b08900; }
.tm-tile.tm-hint::after { background: rgba(96, 200, 120, .40); box-shadow: inset 0 0 0 3px #2f7d46; }

/* translateX, not margin-left: tiles overlap by their own drawn thickness, so
   nudging one sideways in the flow would slide it under the neighbour that is
   painted over its left side.  A transform moves the painted tile itself. */
.tm-tile.tm-no { animation: tm-shake .3s; }
@keyframes tm-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.tm-tile.tm-go {
  transition: opacity .22s ease-out, transform .22s ease-out;
  opacity: 0;
  transform: scale(1.18);
  pointer-events: none;
}

.tm-status.tm-won {
  background: var(--accent);
  color: var(--accent-ink);
  border-left-color: var(--accent-deep);
  font-weight: 650;
}

@media (prefers-reduced-motion: reduce) {
  .tm-tile.tm-go, .tm-tile.tm-no { transition: none; animation: none; }
}

/* The level picker.  A native <dialog>, so the modality, the backdrop and the
   Escape key are the browser's; only the look is ours.  Dismissing it leaves
   the board already dealt behind it, so it is never a dead end. */
.tm-dialog {
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 1.25rem 1.4rem 1.4rem;
  max-width: 22rem;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 12px 40px rgba(0, 0, 0, .35);
}
.tm-dialog::backdrop { background: rgba(0, 0, 0, .45); }
.tm-dialog h2 { margin: 0 0 .2rem; font-size: 1.25rem; }
.tm-dialog-lede { margin: 0 0 .9rem; color: var(--text-muted); font-size: .9rem; }

.tm-levels { display: flex; flex-direction: column; gap: .45rem; }

.tm-level {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .1rem;
  font: inherit;
  text-align: left;
  padding: .5rem .8rem;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--bg-tint);
  color: var(--text);
  cursor: pointer;
}
.tm-level:hover { border-color: var(--accent-deep); }
/* Accent means "on" here too: the level the current board was dealt from. */
.tm-level[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent-deep);
}
.tm-level-name { font-weight: 650; }
.tm-level-note { font-size: .85rem; color: var(--text-muted); }
.tm-level[aria-pressed="true"] .tm-level-note { color: inherit; opacity: .8; }

/* The win line ends in its own way out, so the button sits inside the status
   strip and has to read against the accent fill that strip takes when won. */
.tm-again { margin-left: .4rem; padding: .15rem .7rem; font-size: .9rem; }
.tm-status.tm-won .tm-again {
  background: var(--accent-ink);
  color: var(--accent);
  border-color: var(--accent-ink);
}