body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 20px;
    padding: 0;
    color: #333;
}

form {
    margin-bottom: 0;
}

form textarea {
    width: 100%;
    max-width: 500px;
    min-width: 500px;
    min-height: 50px;
    margin-bottom: 10px;
    padding: 10px;
    border-color: #b9b9b9;
    margin-top: 10px;
}
.wrapper {
    width:800px;
    max-width: 100%;
    padding: 15px;
}
button, .check-btn {
    padding: 10px 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    cursor: pointer;
    display: inline;
    font-size: 14px;
    height: 36px;
    transition: .3s;
}
.check-btn {
    background-color: green;
}
.check-btn:hover {
    opacity: .8;
}
button:hover {
    background-color: #0056b3;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table, th, td {
    border: 1px solid black;
}

th, td {
    padding: 10px;
    text-align: center;
}

#timer {
    font-size: 18px;
    margin: 20px 0;
}