/* ============================================================
   Connect Four — game-specific styles
   ============================================================ */

.cf-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.cf-toggle {
  display: inline-flex;
  border: 2px solid var(--ink);
  border-radius: 999px;
  overflow: hidden;
}
.cf-toggle button {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.85rem;
  padding: 8px 16px;
  border: none;
  background: var(--surface);
  color: var(--ink-soft);
  cursor: pointer;
}
.cf-toggle button.active {
  background: var(--ink);
  color: #fff;
}

#difficulty-row {
  display: flex;
  gap: 8px;
}
#difficulty-row[hidden] {
  display: none;
}

.cf-score-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.cf-status {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink-soft);
  min-height: 1.4em;
  text-align: center;
}

.cf-board {
  --cf-cols: 7;
  --cf-rows: 6;
  --cf-board-width: 520px;
  display: grid;
  grid-template-columns: repeat(var(--cf-cols), 1fr);
  grid-template-rows: repeat(var(--cf-rows), 1fr);
  gap: 7px;
  width: min(var(--cf-board-width), 92vw);
  aspect-ratio: var(--cf-cols) / var(--cf-rows);
  padding: 10px;
  box-sizing: border-box;
  border: 3px solid var(--ink);
  border-radius: var(--radius-md);
  background: var(--simon-blue);
  box-shadow: var(--shadow);
}
.cf-board.is-xl {
  --cf-board-width: 660px;
  gap: 6px;
}

.cf-cell {
  appearance: none;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--bg-soft);
  cursor: pointer;
  position: relative;
  box-shadow: inset 0 3px 0 rgba(34, 49, 74, 0.16);
  transition: transform 0.08s ease, filter 0.08s ease;
}
.cf-cell:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: brightness(1.04);
}
.cf-cell:disabled {
  cursor: default;
}
.cf-cell::after {
  content: '';
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: transparent;
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.12);
}
.cf-cell.is-red::after {
  background: var(--simon-red);
}
.cf-cell.is-yellow::after {
  background: var(--simon-yellow);
}
.cf-cell.is-drop::after {
  animation: cf-drop 0.46s cubic-bezier(0.16, 0.86, 0.28, 1);
}
.cf-cell.win-cell {
  border-color: #fff;
  box-shadow: 0 0 0 3px var(--simon-green), inset 0 3px 0 rgba(34, 49, 74, 0.16);
}

@keyframes cf-drop {
  from { transform: translateY(calc(-1 * var(--drop-y, 0px))); opacity: 0.75; }
  68% { transform: translateY(0); opacity: 1; }
  80% { transform: translateY(-13%); opacity: 1; }
  90% { transform: translateY(0); opacity: 1; }
  96% { transform: translateY(-4%); opacity: 1; }
  to { transform: translateY(0); opacity: 1; }
}

#game-stage:fullscreen,
#game-stage.is-ios-fullscreen {
  border-radius: 0;
  border: none;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  height: calc(var(--obg-vh, 1vh) * 100);
  justify-content: flex-start;
  background: var(--bg-soft);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
#game-stage:fullscreen .cf-board,
#game-stage.is-ios-fullscreen .cf-board {
  width: min(94vw, calc(84vh * var(--cf-cols) / var(--cf-rows)));
  width: min(94vw, calc(84dvh * var(--cf-cols) / var(--cf-rows)));
}

@media (max-width: 480px) {
  .cf-board {
    gap: 5px;
    padding: 8px;
  }
  .cf-toggle button {
    padding: 8px 12px;
  }
}