body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
.btn {
    display: inline-block;
    padding: 8px 16px;
    background: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
}
.btn:hover {
    background: #0056b3;
}
.form-group label {
    display: block;
    margin: 10px 0 5px;
    font-weight: bold;
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
.error {
    color: #d9534f;
    background: #fdf7f7;
    padding: 10px;
    border-radius: 4px;
    margin: 10px 0;
}
table { border: 1px solid #ddd; }
th, td { padding: 8px; text-align: left; }
th { background: #f1f1f1; }