body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
}
.login-box {
    max-width: 300px;
    margin: 100px auto;
    padding: 20px;
    background: white;
    border-radius: 5px;
    box-shadow: 0 0 10px #ccc;
}
input, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    box-sizing: border-box;
}
.error {
    color: red;
}
.stats {
    display: flex;
    gap: 20px;
    margin: 20px 0;
}
.card {
    flex: 1;
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 5px #ccc;
}
table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}
th, td {
    padding: 10px;
    border: 1px solid #ddd;
}