body{

font-family:sans-serif;

background:#f2f6f9;

text-align:center;

margin:0;

line-height:1.2;

}


h1{
margin-top:12px;
}

.subtitle{
color:#555;
margin-bottom:12px;
}

#game-board{

display:grid;
grid-template-columns:repeat(6,1fr);
gap:10px;

max-width:650px;
margin:auto;
padding:10px;

}

.card{
width:100%;
aspect-ratio:1/1;
perspective:1000px;
}

.card-inner{
position:relative;
width:100%;
height:100%;
transition:transform 0.5s;
transform-style:preserve-3d;
}

.card.flipped .card-inner{
transform:rotateY(180deg);
}

.card-front,
.card-back{

position:absolute;
width:100%;
height:100%;

backface-visibility:hidden;

border-radius:10px;
overflow:hidden;

box-shadow:0 4px 10px rgba(0,0,0,0.15);

}

.card-front{
transform:rotateY(180deg);
background:white;
}

.card-back{
background:white;
}

.card img{
width:100%;
height:100%;
object-fit:contain;
}

@media (max-width:600px){

#game-board{
grid-template-columns:repeat(4,1fr);
}

}

/* ===== 타이머 UI ===== */

#ui{

display:flex;

align-items:center;

justify-content:center;

gap:15px;

font-size:20px;

margin-bottom:10px;

font-weight:bold;

}


/* ===== 게임 종료 화면 ===== */

#game-clear{
display:none;
margin-top:30px;
text-align:center;
}

/* ===== 216 고양이 ===== */

#cat{

width:150px;

animation:dance 0.6s infinite alternate;

}


/* ===== 고양이 춤 애니메이션 ===== */

@keyframes dance{

0%{
transform:rotate(-10deg) scale(1);
}

100%{
transform:rotate(10deg) scale(1.1);
}

}

#restart{

margin-top:15px;

padding:10px 20px;

font-size:18px;

border:none;

border-radius:10px;

background:#3da9fc;

color:white;

cursor:pointer;

}

#restart:hover{

background:#1e88e5;

}

document.getElementById("restart").addEventListener("click", function(){

location.reload()

})