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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background: #333;
    color: #fff;
    padding: 0.5rem 0;
}

nav ul {
    list-style: none;
    display: flex;
    padding: 0 20px;
}

nav ul li {
    margin-right: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 5px 10px;
}

nav ul li a:hover {
    background: #575757;
    border-radius: 3px;
}

main {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

footer {
    text-align: center;
    padding: 20px;
    background: #333;
    color: #fff;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.alert {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.alert.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

form {
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    max-width: 500px;
    margin: 20px auto;
}

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

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="datetime-local"],
textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button, .button {
    background: #333;
    color: #fff;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

button:hover, .button:hover {
    background: #555;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    margin: 20px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

table th, table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

table th {
    background-color: #f2f2f2;
    font-weight: bold;
}

table tr:hover {
    background-color: #f5f5f5;
}

.btn-edit, .btn-delete {
    padding: 5px 10px;
    border-radius: 3px;
    text-decoration: none;
    color: #fff;
    margin-right: 5px;
}

.btn-edit {
    background-color: #28a745;
}

.btn-delete {
    background-color: #dc3545;
}

.pagination {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.pagination a, .pagination strong {
    padding: 8px 12px;
    margin: 0 4px;
    border: 1px solid #ddd;
    text-decoration: none;
    color: #333;
}

.pagination a:hover {
    background: #f0f0f0;
}

.pagination strong {
    background: #333;
    color: #fff;
    border-color: #333;
}

.stats-container {
    display: flex;
    gap: 20px;
    margin: 20px 0;
}

.stat-box {
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    flex: 1;
    text-align: center;
}

.stat-box h3 {
    margin-bottom: 10px;
    color: #666;
}

.stat-box p {
    font-size: 2em;
    font-weight: bold;
    color: #333;
}

canvas {
    max-width: 100%;
    background: #fff;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin: 20px 0;
}