body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f7f9fb;
    margin: 0;
    padding: 20px;
    color: #333;
}

h1, h2 {
    color: #007BFF;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
    margin-bottom: 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

table th, table td {
    padding: 12px 15px;
    border: 1px solid #dee2e6;
    text-align: left;
}

table th {
    background-color: #f0f4f8;
    color: #333;
    font-weight: bold;
}

form {
    background-color: #ffffff;
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 25px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

input[type="text"], input[type="number"], input[type="email"], select {
    padding: 8px 10px;
    margin-right: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    min-width: 150px;
}

button {
    background-color: #007BFF;
    color: white;
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

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

a {
    color: #007BFF;
    text-decoration: none;
    margin: 0 5px;
}

a:hover {
    text-decoration: underline;
}

.card-container {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    flex: 1;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.card h2 {
    font-size: 28px;
    color: #28a745;
}

.success {
    color: green;
    margin-bottom: 10px;
}

.error {
    color: red;
    margin-bottom: 10px;
}

li {     
    max-width: 150px;
    float: left;
    padding-right: 5px;
}

nav {
    background-color: #007BFF;
    padding: 10px 0;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    padding: 8px 12px;
    border-radius: 5px;
    transition: background 0.3s;
}

nav ul li a:hover,
nav ul li a.active {
    background-color: rgba(255, 255, 255, 0.2);
}