css/style.css

h1 {
    text-align: center;
}

textarea {
    width: 100%;
}

text {
    color: tomato;
    cursor: pointer;
}

#fileInput {
    position: relative;
    display: block;
    margin: 0 auto;
}

table {
    display: block;
    width: fit-content;
    margin: 0 auto;
}

input {
    width: 240px;
}

.tab {
    overflow: hidden;
    border: 1px solid #ccc;
    background-color: #f1f1f1;
}

.tab button {
    background-color: inherit;
    float: left;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 14px 16px;
    transition: 0.3s;
}

.tab button:hover {
    background-color: #ddd;
}

.tab button.active {
    background-color: #ccc;
}

.tabcontent {
    display: none;
    padding: 6px 12px;
    border: 1px solid #ccc;
    border-top: none;
}