.bridge-puzzle {
  --puzzle-ink: #263c32;
  --puzzle-copper: #a76242;
  color: var(--puzzle-ink);
  width: 100%;
  text-align: left;
}

.bridge-puzzle, .bridge-puzzle * { box-sizing: border-box; }
.bridge-puzzle button { font: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
.bridge-puzzle button:focus-visible { outline: 3px solid #a45d36; outline-offset: 3px; z-index: 2; }
.bridge-puzzle button:disabled { cursor: default; }
.bridge-puzzle-eyebrow { display: block; color: #8c694a; font-size: 10px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.bridge-puzzle-title-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.bridge-puzzle h2 { margin: 5px 0 0; font-size: clamp(22px, 4vw, 31px); font-family: Georgia, 'Times New Roman', serif; font-weight: 500; letter-spacing: -.045em; line-height: 1.15; }
.bridge-puzzle-progress { flex: 0 0 auto; font-size: 23px; font-variant-numeric: tabular-nums; font-weight: 700; }
.bridge-puzzle-progress > span { color: #927e64; font-size: 13px; font-weight: 500; }
.bridge-puzzle-instructions { margin: 12px 0 18px; max-width: 49ch; color: #5c6557; font-size: 13px; line-height: 1.5; }
.bridge-puzzle-layout { display: grid; grid-template-columns: minmax(180px, 1.2fr) minmax(112px, .85fr); gap: 24px; align-items: start; }
.bridge-board-wrap { max-width: 290px; width: 100%; justify-self: center; }
.bridge-board { display: grid; gap: 4px; padding: 11px; border: 1px solid #8d714b; border-radius: 8px; background: #344b3e; box-shadow: inset 0 0 0 4px #b69b6c, 0 8px 20px #3b493215; }
.bridge-board-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; }
.bridge-cell { display: grid; place-items: center; position: relative; min-width: 0; min-height: 44px; width: 100%; aspect-ratio: 1; padding: 0; border: 1px solid #a8b29733; border-radius: 3px; color: #a9b39c; background: #253e32; font-size: 20px; line-height: 1; transition: background 120ms ease, box-shadow 120ms ease; }
.bridge-cell.is-filled { color: #fff6df; background: var(--stone-color); border-color: #fff9db38; box-shadow: inset 0 2px 0 #fff5cd25, inset 0 -3px 0 #172d252b; font-size: 16px; font-weight: 800; text-shadow: 0 1px 2px #23392a55; }
.bridge-cell.is-filled::after { content: ''; position: absolute; right: 5px; bottom: 5px; width: 3px; height: 3px; border-radius: 50%; background: #f7e3ae79; }
.bridge-cell.is-ghost { background: #7f9671; box-shadow: inset 0 0 0 2px #e1d8a1; color: #fff9dc; }
.bridge-cell.is-invalid { background: #885b45; box-shadow: inset 0 0 0 2px #efb38a; color: #ffe4c3; }
.bridge-board-caption { display: block; margin-top: 10px; font-size: 8px; font-weight: 800; letter-spacing: .23em; text-align: center; color: #947c5c; }
.bridge-tools { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.bridge-piece-tray { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
.bridge-piece { position: relative; display: flex; align-items: center; justify-content: flex-start; flex-direction: column; width: 100%; min-width: 0; min-height: 78px; padding: 4px 3px 7px; border: 1px solid #b6a68c; border-radius: 6px; color: #3d5140; background: #f4ead7; transition: border-color 120ms, background 120ms, opacity 120ms; }
.bridge-piece.is-selected { background: #fff9ea; border-color: #a76242; box-shadow: 0 0 0 2px #a76242, 0 3px 9px #5c43251a; }
.bridge-piece.is-placed { opacity: .42; background: #e5decf; }
.bridge-piece-preview { display: block; width: 64px; max-width: 100%; height: 49px; flex-shrink: 0; }
.bridge-piece-name { white-space: nowrap; font-size: 11px; line-height: 1.2; }
.bridge-piece-name b { font-size: 9px; opacity: .6; margin-right: 2px; }
.bridge-piece-check { position: absolute; top: 4px; right: 6px; font-size: 12px; font-weight: bold; }
.bridge-rotate { display: flex; align-items: center; justify-content: center; gap: 7px; min-height: 44px; padding: 7px 9px; background: #314c3d; color: #fff1d4; border: 1px solid #314c3d; border-radius: 5px; font-size: 12px !important; font-weight: 650 !important; }
.bridge-rotate > span { font-family: sans-serif; font-size: 25px; line-height: .8; }
.bridge-rotate kbd { margin-left: auto; font: inherit; opacity: .55; font-size: 10px; }
.bridge-rotate:disabled { opacity: .45; }
.bridge-history-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.bridge-history-controls button { min-width: 0; min-height: 44px; padding: 8px 4px; border: 1px solid #b7a78c; border-radius: 5px; background: transparent; color: #5d604e; font-size: 11px; }
.bridge-history-controls button:disabled { opacity: .35; }
.bridge-move-count { text-align: center; color: #8d7c62; font-size: 9px; white-space: nowrap; }
.bridge-puzzle-message { min-height: 36px; margin: 17px 0 0; padding: 10px 0 0; border-top: 1px solid #bdab8d66; color: #52684f; font-size: 12px; line-height: 1.45; }
.bridge-keyboard-hint { display: block; color: #9b896f; font-size: 9px; line-height: 1.45; margin-top: 7px; }
.bridge-puzzle.is-solved .bridge-board { border-color: #d3a650; box-shadow: inset 0 0 0 4px #ccae71, 0 0 26px #c9a45933; }
.bridge-puzzle.is-solved .bridge-puzzle-progress { color: #6a7b40; }

@media (hover: hover) {
  .bridge-piece:not(:disabled):hover { border-color: #a76242; background: #fff9ea; }
  .bridge-history-controls button:not(:disabled):hover { background: #e7dcc5; }
  .bridge-rotate:not(:disabled):hover { background: #456149; }
}

@media (max-width: 520px) {
  .bridge-puzzle-layout { gap: 12px; grid-template-columns: minmax(188px, 1.35fr) minmax(106px, .8fr); }
  .bridge-board { padding: 7px; gap: 3px; box-shadow: inset 0 0 0 3px #b69b6c, 0 6px 15px #3b493215; }
  .bridge-board-row { gap: 3px; }
  .bridge-tools { gap: 8px; }
  .bridge-piece-tray { gap: 6px; }
  .bridge-piece { min-height: 69px; padding-bottom: 6px; }
  .bridge-piece-preview { height: 42px; }
  .bridge-piece-name { font-size: 9px; }
  .bridge-piece-name b { font-size: 8px; margin-right: 0; }
  .bridge-puzzle-instructions { font-size: 12px; margin: 10px 0 14px; }
  .bridge-keyboard-hint, .bridge-rotate kbd { display: none; }
  .bridge-rotate { gap: 5px; }
  .bridge-history-controls { gap: 6px; }
  .bridge-move-count { font-size: 8px; }
}

@media (max-width: 389px) {
  .bridge-puzzle-layout { grid-template-columns: 1fr; gap: 14px; }
  .bridge-board-wrap { max-width: 235px; }
  .bridge-tools { max-width: 300px; width: 100%; justify-self: center; }
  .bridge-piece-tray { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .bridge-puzzle h2 { font-size: 21px; }
}

@media (prefers-reduced-motion: reduce) {
  .bridge-puzzle * { transition: none !important; }
}