@keyframes change {
  from { background-color: Plum; }
  to   { background-color: PowderBlue; }
}

* {
	color: DarkViolet;
	text-align: center;
}

body {
	animation: change 2s linear infinite alternate; 
	font-size: 36px; 
	padding: 60px;    
	font-family: sans-serif; 
}

h1 { font-size: 48px; }

#menu-container {
    margin-top: 30px;
}

#game-container {
	display: none;
	margin-top: 20px;
}

#game-feedback {
    font-weight: bold;
    margin-top: 15px;
    height: 20px;
}


button {
	padding: 14px 20px;
    font-size: 20px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
    background-color: Purple;
    color: white;
    transition: transform 0.2s;
}

button:hover {
    transform: scale(1.05);
}

.menu-btn {
    margin-top: 15px;
    background-color: Gray;
    color: white;
}

.game-link {
    display: inline-block;
    padding: 14px 20px;
    font-size: 20px;
    text-decoration: none; 
    border-radius: 5px;
    background-color: purple; 
    color: white;
    transition: transform 0.2s;
    margin-left: 10px;
}

.game-link:hover {
    transform: scale(1.05);
}


.grid-container {
    display: grid;
    grid-template-columns: repeat(4, 100px); 
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
    perspective: 1000px;
}

.card {
    width: 100px;
    height: 100px;
    cursor: pointer;
}

.card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s ease-in-out;
}

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

.card:not(.flipped):hover .card-inner {
    transform: scale(1.05);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.card-front {
    background-color: Indigo;
    color: white;
}

.card-back {
    background-color: Indigo;
    transform: rotateY(180deg);
}

.card-back img {
    width: 100%;
    height: 100%;
    object-fit: cover; 
    border-radius: 8px;
}