@font-face {
    font-family: 'D-DINCondensed';
    src: url('fonts/D-DINCondensed.otf') format('truetype');
}
* {
    font-family: 'D-DINCondensed', sans-serif;
}
html {
    width:100vw;
    height:100%;
}
body {
    font-family: 'D-DINCondensed', sans-serif;
    margin:0px;
    background-image: -webkit-gradient(linear, left top, left bottom, from(#4481eb), to(#04bedd));
    background-image: -o-linear-gradient(top, #4481eb 0%, #04bedd 100%);
    background: linear-gradient(to bottom, #121212, #2c2c2c);
}

p {
    font-size: 60px;
    margin-top:5px;
}
td {
    background-color: transparent;
    height:70px;
    width:70px;
    animation: fadeIn 0.5s ease-in;
}
@keyframes fadeIn {
    from {
        transform: scale(0.5);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

td, .inner, .front, .back {
    border-radius: 4px;
}
table {
    margin-top: 80px;
}

#inst {
    width: 85vw;
    background-color: rgba(255,255,255,0.1);
    text-align: center;
    margin-top:16vh;
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
    border: 0.2px solid #ffff;
    border-radius: 10px;
    padding: 5px;
}
#inst li {
    text-align: left;
    padding: 5px;
}

button {
    background-color: rgba(255,255,255,0.2);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    color: white;
    margin: 5px;
    border: 0.1px solid #ffff;
    border-radius: 10px;
    font-weight:normal;
    width:100px;
    font-size:26px;
    padding:5px;
}

#ol {
    position: absolute;
    height:100vh;
    width:100vw;
    background-color: rgba(0,0,200,0.1);
    color: white;
    -webkit-backdrop-filter: blur(8px);
            backdrop-filter: blur(8px);
    z-index:2;
    
}
#iol {
    text-align: center;
    position: absolute;
    width: 100vw;
    top: 35vw;
}

#title {
    background-color: rgba(255,255,255,0.25);
    -webkit-backdrop-filter: blur(15px);
            backdrop-filter: blur(15px);
    border-radius:10px;
    margin: 8px;
    margin-top:0px;
    color: white;
    height:56px;
    text-align: center;
}

#time {
    position: absolute;
    right: 20px;
    font-size: 26px;
    top: 8.5px;
}

#moves {
    position: absolute;
    left: 20px;
    font-size: 26px;
    top:8.5px;
}

#logo {
    font-size: 32px;
    padding-top: 10px;
    display: block;
}

.inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    -webkit-transition: -webkit-transform 0.8s;
            transition: -webkit-transform 0.8s;
         -o-transition: transform 0.8s;
            transition: transform 0.8s;
            transition: transform 0.8s, -webkit-transform 0.8s;
    -webkit-transform-style: preserve-3d;
            transform-style: preserve-3d;
    -webkit-transform: rotateY(0deg);
            transform: rotateY(0deg);
}
.flipped .inner {
    transform: rotateY(180deg);
}
.front {
    background-color: rgba(255,255,255,0.3);
}

.back {
    background-color: rgba(255,255,255,0.5);
    -webkit-transform: rotateY(180deg);
            transform: rotateY(180deg);
}
.front, .back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
    
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;        /* Adjust this as needed */
    line-height: 1;
    padding: 0;
}
.back p {
  margin: 0;
  padding: 0;
  line-height: 1;
  font-size: 40px;
}
button:hover, button:active {
    outline:0;
}
td:hover .front {
    transform: scale(1.05);
    background-color: rgba(255, 255, 255, 0.4);
    transition: transform 0.2s, background-color 0.2s;
}
@media (max-width: 768px) {
    td {
        height: 50px;
        width: 50px;
    }

    #title {
        font-size: 20px;
        height: 40px;
    }

    button {
        font-size: 20px;
        width: 80px;
    }

    p {
        font-size: 30px;
    }
    .back p {
        font-size: 28px; /* fits nicely in 50x50 tiles */
    }
}
td.matched {
    animation: glowPulseOnce 3.0s ease-out forwards;
}
@keyframes glowPulseOnce {
    0% {
        box-shadow: 0 0 0px 0px rgba(0, 255, 0, 0);
    }
    50% {
        box-shadow: 0 0 20px 10px rgba(0, 255, 0, 0.6);
    }
    100% {
        box-shadow: 0 0 0px 0px rgba(0, 255, 0, 0);
    }
}