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

body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
}

nav {
    background: #333;
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
}

nav .logo {
    font-size: 1.5em;
    font-weight: bold;
}

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

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

.container {
    max-width: 100%;
    margin: 30px auto;
    padding: 20px;
    background: white;
    border-radius: 5px;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 30px;
    background: white;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.login-container h2 {
    text-align: center;
    margin-bottom: 20px;
}

input, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}

button {
    background: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #0056b3;
}

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 10px;
    margin: 10px 0;
    border-radius: 3px;
}

.message {
    background: #d4edda;
    color: #155724;
    padding: 10px;
    margin: 10px 0;
    border-radius: 3px;
}

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

.card {
    background: #007bff;
    color: white;
    padding: 20px;
    border-radius: 5px;
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    background: #28a745;
    color: white;
    text-decoration: none;
    margin: 5px;
}

table {
    width: 100%;
    margin-top: 20px;
}

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