header {
    text-align: center;
    background-color: #581ea5;
    color: #fff;
    padding: 1em;
}

body {
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
}

#game-container {
  display: flex;
  justify-content: center;
}
p{
    display: flex;
    justify-content: center;
}

.card {
    width: 120px;
    height: 150px;
    margin: 10px;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    user-select: none;
}
.card img {
    max-width: 100%;
    max-height: 100%;
}
#score {
    font-size: 20px;
    text-align: center;
    margin-bottom: 20px;
    border: thick solid #581ea5;
    font-weight: bold;
}

#buttons {
    text-align: center;
    padding: 5px;
}

.button {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    text-decoration: none;
    margin: 10px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
  }

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0);
    z-index: 999;
}