body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f3f3f3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

header {
    background-color: #009879;
    color: #ffffff;
    width: 96.9vw;
    margin-top: -1rem;
    padding: 20px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.form-container {
    background-color: #ffffff;
    padding: 20px;
    margin: 4rem 0;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 600px;
}

.user-form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: 20px;
}

.form-input {
    width: 95%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.form-error {
    color: red;
    font-size: 0.9em;
    margin-top: 5px;
}

.form-button-group {
    display: flex;
    justify-content: space-between;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 1em;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

table thead tr {
    background-color: #009879;
    color: #ffffff;
    text-align: left;
}

table th, table td {
    padding: 12px 15px;
}

table tbody tr {
    border-bottom: 1px solid #dddddd;
}

table tbody tr:nth-of-type(even) {
    background-color: #f3f3f3;
}

table tbody tr:last-of-type {
    border-bottom: 2px solid #009879;
}

.button {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px; cursor: pointer;
    text-align: center;
    text-decoration: none;
    outline: none;
    color: #fff;
    background-color: #009879;
    border: none;
    border-radius: 15px;
    box-shadow: 0 9px #999;
}

.button-disabled {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px; cursor: pointer;
    text-align: center;
    text-decoration: none;
    outline: none;
    color: #fff;
    background-color: #5FBAA8;
    border: none;
    border-radius: 15px;
    box-shadow: 0 9px #999;
    cursor: default;
}

.button:hover {
    background-color: #007f66
}

.button:active {
    background-color: #007f66;
    box-shadow: 0 5px #666;
    transform: translateY(4px);
}