/* ---------- fallback background and base ---------- */
body {
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #1e3c72, #09a1e7);
  background-size: cover;
  background-position: center;
  transition: background 1.2s ease-in-out;
  font-family: "Segoe UI", Arial, sans-serif;
}

/* Game container (tablet) */
#game-container {
  width: 100%;
  max-width: 340px;
  margin: 40px auto;
  text-align: center;
  padding: 20px;
  background: rgba(255, 255, 255, 0.082);
  backdrop-filter: blur(4px) saturate(170%);
  border: 1px solid rgba(255, 255, 255, 0.103);
  border-radius: 16px;
  color: #f7f3f3;
  box-shadow: 0 0 20px rgba(0,0,0,0.45);
  position: relative; 
}

.tic-tac-toe * {
  max-width: 100%;
}

/* Title */
.title {
  font-size: 28px;
  margin-bottom: 6px;
}

/* Theme indicator */
#theme-indicator {
  font-size: 16px;
  margin-bottom: 14px;
}

/* Board grid (cells present inside #board) */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  justify-items: center;
}

/* Cells */
.cell {
  width: 90px;
  height: 90px;
  font-size: 58px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(255, 255, 255, 0.185);
  border-radius: 14px;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
  overflow: hidden;
  position: relative;
}

.cell:hover {
  background: rgba(255,255,255,0.4);
  transform: scale(1.05);
}

/* piece image inside cell */
.piece-img {
  width: 78%;
  height: 78%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
}

/* Optional helper classes for color glow */
.x { color: #ffd700; text-shadow: 0 0 8px #ff8c00; }
.o { color: #00eaff; text-shadow: 0 0 8px #0088ff; }

/* Reset button */
#reset-btn {
  margin-top: 16px;
  padding: 10px 20px;
  font-size: 15px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  background: rgb(253, 253, 253);
  font-weight: bold;
}

/* ---------- Popup (fantasy-styled) ---------- */
.popup {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.92);
  background: linear-gradient(180deg, rgba(6,6,10,0.92), rgba(14,8,20,0.85));
  border-radius: 14px;
  padding: 18px;
  width: min(360px, 86vw);
  max-width: 96%;
  color: #fffdfd;
  box-shadow: 0 15px 60px rgba(0,0,0,0.6), 0 0 32px rgba(120,50,200,0.06) inset;
  z-index: 1500;
  transition: transform 280ms cubic-bezier(.2,.9,.3,1), opacity 220ms;
  opacity: 0;
  pointer-events: none;
}

.popup.show {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
  pointer-events: auto;
}

.popup.hidden {
  transform: translate(-50%, -50%) scale(0.92);
  opacity: 0;
  pointer-events: none;
}

/* popup inner content */
.popup-content { text-align:center; }
#winner-text { font-weight:700; margin-top: 6px; font-size:18px; color:#f7f1ff; text-shadow: 0 2px 8px rgba(0,0,0,0.6); }

/* popup action button */
.popup-btn {
  margin-top: 12px;
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight:700;
  background: linear-gradient(180deg,#ffd6ff,#ff8bfb);
  color:#360032;
  box-shadow: 0 8px 30px rgba(180,80,200,0.18);
}

/* Winner piece image in popup */
#winner-piece-img {
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 6px 18px rgba(0,0,0,0.4);
}

/* Tablet-close (button inside tablet) */
.tablet-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: none;
  background: rgba(10, 101, 238, 0.24);
  color: #4759ff;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  z-index: 100;
}

/* Confetti canvas */
#confetti-canvas { position:absolute; top:0; left:0; width:100%; height:100%; pointer-events:none; border-radius:16px; }

/* Minimize Circle (draggable launcher) */
.minimize-circle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #4fe4f8; /* overridden by JS to use knight image */
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-size: 22px;
  cursor: grab;
  z-index: 1600;
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}

/* hidden helper */
.hidden { display: none !important; }

/* small responsive adjustments */
@media (max-width:420px){
  #game-container { width: 94%; margin: 28px auto; padding: 14px; }
  .cell { width: min(18vw, 72px); height: min(18vw,72px); }
  .piece-img { width: 72%; height: 72%; }
}