:root{
  --board-size: 8;
  --tile-size: calc(min(12vw, 56px));
  --gap: 6px;
  --bg: #f6efe6;
  --card-bg: #fff;
  --accent: #6b3f1a;
  --ui-radius: 12px;
}
*{box-sizing:border-box;font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;}
html,body{height:100%;margin:0;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);color:#2b2b2b;}
.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:16px;gap:12px;}
header{width:100%;max-width:520px;display:flex;justify-content:space-between;align-items:center}
.title{display:flex;gap:8px;align-items:center}
.logo{font-size:20px;font-weight:700;color:var(--accent)}  
.panel{background:var(--card-bg);border-radius:var(--ui-radius);box-shadow:0 6px 16px rgba(0,0,0,0.06);padding:10px 12px;display:flex;gap:12px;align-items:center}
.score{font-weight:700;font-size:16px}
.moves{font-size:13px;color:#666}
main{width:100%;max-width:520px;display:flex;flex-direction:column;align-items:center;gap:10px}
.levelbar{width:92%;height:12px;background:#eee;border-radius:8px;overflow:hidden;margin:6px 0}
.levelbar > i{display:block;height:100%;width:0%;background:linear-gradient(90deg,#ffd67a,#ff9f43);transition:width 400ms ease}
.info-row{width:92%;display:flex;justify-content:space-between;align-items:center}
.board-wrap{background:transparent;padding:8px;border-radius:16px}
.board{
  display:grid;
  grid-template-columns: repeat(var(--board-size), var(--tile-size));
  grid-template-rows: repeat(var(--board-size), var(--tile-size));
  gap: var(--gap);
  touch-action: none;
  user-select: none;
}
.tile{
  width:var(--tile-size);
  height:var(--tile-size);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  transition: transform 160ms ease, opacity 200ms ease;
  box-shadow: 0 6px 0 rgba(0,0,0,0.05) inset;
  cursor:grab;
  background: #f5efe7;
  overflow:hidden;
}
.tile:active{cursor:grabbing; transform:scale(0.98)}
.tile img{width:76%;height:76%;object-fit:contain;pointer-events:none;display:block}
.removed{opacity:0;transform:scale(0.3) rotate(-15deg);transition:all 260ms ease}
.hint{outline:3px solid rgba(255,255,255,0.08); box-shadow:0 6px 18px rgba(0,0,0,0.12) inset}
.controls{display:flex;gap:8px}
button{background:var(--accent);color:#fff;border:none;padding:8px 10px;border-radius:10px;font-weight:600}
.powerups{display:flex;gap:6px;align-items:center}
.powerup-btn{background:#fff;border-radius:10px;padding:6px;border:1px solid #e6d7c9;display:flex;align-items:center;gap:6px;cursor:pointer}
.highscores{width:92%;background:#fff;border-radius:10px;padding:8px;border:1px solid #eee}
@media (max-width:420px){
  :root{--tile-size:calc(min(12vw,48px))}
  .panel{padding:8px}
}