body {
    background-color: darkslategray;
    font-family: 'Helvetica';
}

.container {
    margin: 0 auto;
}

.title {
    color: white;
    font-size: 50px;
    font-weight: bold;
}

.title, #title, #title2 {
    text-align: center;
    padding-top: 15px;
    padding-bottom: 15px;
}

.card {
    background-color: ghostwhite;
    width: 120vh;
    margin: 0 auto;
    border-radius: 5px;
    height: 60vh;
    box-sizing: border-box;
    padding: 10px;
}

.the-instruction, .the-controllers {
    text-align: left!important;
}

.field {
    display: flex;
    justify-content: stretch;
}

input[type=text] {
    width: 100%;
}

button.start {
    padding: 10px;
    background-color: #0069d9;
    color: floralwhite;
}

button.start:hover {
    background-color: #5d96d4 ;
}

button.start:disabled {
    background-color: #808080 ;
}

#playground {
    text-align: center;
    display: none;
    margin-top: -50px;
}

#playground .header {
    display: flex;
    justify-content: space-between;
    width: 960px;
    margin: 0 auto;
    align-items: baseline;
    color: white;
    margin-bottom: -50px;
}

.option {
    display: flex;
    flex-direction: column;
    width: 300px;
    margin: 0 auto;
    margin-top: 20px;
}

#option {
    margin: 0 auto;
    display: flex;
    flex-direction: row;
    width: 100%;
}

.rewind, .cancel {
    margin: 0 auto;
    padding: 15px;
    border-radius: 10px;
    border: 0;
    color: white;
    width: 50%;
}

.rewind {
    background-color: firebrick;
}

.cancel {
    display: none;
    background-color: grey;
}

#rewind {
    display: none;
}

button {
    cursor: pointer;
}