body {
    font-family: Arial, sans-serif;
    background: #f0f4f7;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 900px;
    margin: auto;
}
h2, h3 { color: #333; text-align: center; }
.card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
form input, form select, form button {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 16px;
}
form button {
    background: #4e54c8;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}
form button:hover { background: #3b40a0; }
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
th, td { padding: 10px; border: 1px solid #ddd; text-align: center; }
th { background: #f4f4f4; }
tfoot td { font-weight: bold; background: #eaeaea; }
.logout {
    display: block;
    text-align: right;
    margin-bottom: 10px;
    text-decoration: none;
    color: #4e54c8;
    font-weight: bold;
}
.logout:hover { color: #3b40a0; }
.error { color: red; }
.success { color: green; }