* {
    box-sizing: border-box;
}

body, html{
    padding: 0;
    margin: 0;
}

body{
    background-color: #fafafa;
}

.card{
    position: absolute;
    width: 150px;
    height: 150px;
    border: 2px solid black;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
    background-color: white;
    font-weight: bold;
    font-family:Verdana, Geneva, Tahoma, sans-serif;
    opacity: 1;
    transition: opacity 1s;
    user-select: none;
}

.topbar{
    display: flex;
    position: fixed;
    width: 100%;
    min-height: 75px;
    top: 10px;
    left: 10px;
    flex-direction: row;
}

.title{
    /* position: fixed; */
    /* width: 100%; */
    min-height: 75px;
    /* top: 0; */
    /* left: 0; */
    margin: 0 20px;
    text-align: center;
    font-weight: bold;
    border: 8px solid black;
    font-size: 80px;
    padding: 25px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#game-button{
    color: white;
    background-color: darkgreen;
    font-size: 40px;
    width: 200px;
    opacity: 1;
    transition: opacity 1s;
}

#game-button[disabled]{
    opacity: 0;
    display: none;
}

.difficulty{
    position: absolute;
    display: flex;
    top: 50vh;
    width: 100%;
    
}
.difficulty button{
    flex: 1;
    padding: 20px;
    font-size: 30px;
    font-weight: bold;
    border: 4px solid black;
    margin: 0 20px;
}

.reset{
    display: flex;
    justify-content: center;
    position: absolute;
    top: 50vh;
    margin: auto;
    width: 100%;
}
.reset button{
    display: none;
    padding: 20px;
    font-size: 30px;
    font-weight: bold;
    border: 4px solid black;
    color: white;
    border-radius: 10px;
    background-color: darkred;
    z-index: 3;
}

#easy{
    background-color: lightgreen;
}
#normal{
    background-color: yellow;
}
#hard{
    background-color: red;
}
#ultimate{
    display: none;
    background-color: purple;
}

#game-text{
    flex: 3;
    margin: 0 20px;
    text-align: center;
    font-weight: bold;
    border: 8px solid black;
    transition: border-color 1s;
    font-size: 40px;
    padding: 5px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

#result-text{
    display: none;
    position: fixed;
    width: 100%;
    background-color: white;
    font-size: 40px;
    text-align: center;
    padding: 10px;
    left: 0;
    top: 50vh;
    border: 4px solid black;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    opacity: 0;
    transition: opacity 0.5s;
}