* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
}

header {
    background: #007bff;
    color: white;
    padding: 1rem 0;
    text-align: center;
}

header p {
    margin: 10px 0;
}

nav ul {
    list-style: none;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

main {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h2 {
    margin-bottom: 10px;
}

form {
    margin: 20px 0;
}

input[type="text"],
input[type="password"],
input[type="date"],
textarea {
    width: calc(100% - 22px);
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    margin: 10px 5px;
    padding: 10px 15px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

footer {
    text-align: center;
    padding: 10px 0;
    background: #007bff;
    color: white;
}

#dataHistory {
    margin-top: 20px;
}