th {
    background-color: grey;
}

.button {
    font-size: 17px;
    padding: 15px 30px 15px;
    background: greenyellow;
    cursor: pointer;
    margin: 5px 0 1px;
    border: 1px solid black;
    border-radius: 5px;
    text-decoration: none;
    display: inline-block;
    color: black;
}

.button:hover {
    background-color: rgba(201, 195, 159, 0.295);
}

.buttons {
    text-align: center;
}

.button2 {
    font-size: 17px;
    padding: 5px;
    background: greenyellow;
    cursor: pointer;
    margin: 5px 0 1px;
    border: 1px solid black;
    border-radius: 10px;
    text-decoration: none;
    display: inline-block;
    color: black;
}

.button2:hover {
    background-color: rgba(201, 195, 159, 0.295);
}

.main-left, .main-right {
    float: left;
}

.main-left {
    width: 400px;
}

.main-right {
    width: 800px;
    border: 1px solid black;
    padding: 20px;
    border-radius: 10px;
    margin: 15px;
}

.main-container::after {
    clear: both;
    content: '';
    display: block;
}

.sublist {
    list-style: none;
    margin: 1px;
}

.tema {
    text-transform: lowercase;
}

ul {
    margin-top: 5px;
}

p.theory {
    margin: 0 auto;
}