body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #121212;
    color: #e0e0e0;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #e0e0e0;
}

#userForm {
    background-color: rgba(0, 0, 0, 0.7);
    padding: 50px;
    border: 50px solid #333;
    border-radius: 50px;
}

form {
    max-width: 600px;
    margin: auto;
}

.form-group {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 15px;
}

.form-group label {
    margin-right: 10px;
    min-width: 150px;
    display: flex;
    color: #e0e0e0;
    font-weight: 600;
    align-items: center;
}

.form-group input {
    flex: 2;
    padding: 13px;
    width: 50%;
    box-sizing: border-box;
    border-radius: 10px;
    border: 1px solid #333;
    background-color: #1f1f1f;
    color: #e0e0e0;
}

button {
    padding: 15px 20px;
    background-color: #333;
    color: #e0e0e0;
    font-size: 17px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 40px;
    display: block;
    width: 100%;
}

button:hover {
    background-color: #444;
}

#spreadsheetContainer {
    width: 100%;
    overflow-x: auto;
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: #1f1f1f;
}

th,
td {
    border: 1px solid #333;
    padding: 15px;
    text-align: left;
}

th {
    background-color: #333;
    color: #e0e0e0;
}

tr:nth-child(even) {
    background-color: #2c2c2c;
}