body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: #f4f6f8;
    color: #333;
    padding: 20px;
    margin: 0;
}
.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
h1, h2, h3 { margin-top: 0; }
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    padding: 10px;
    border-bottom: 1px solid #ddd;
    text-align: left;
}
a { color: #0073aa; text-decoration: none; }
a:hover { text-decoration: underline; }
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.btn {
    display: inline-block;
    padding: 8px 12px;
    background: #0073aa;
    color: #fff;
    border: none;
    border-radius: 4px;
    text-decoration: none;
    cursor: pointer;
}
.btn:hover { background: #005177; text-decoration: none; }
.btn-small { padding: 4px 8px; font-size: 0.9em; }
.btn-danger { background: #d63638; }
.btn-danger:hover { background: #b32d2e; }
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 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;
}
.badge {
    padding: 3px 6px;
    border-radius: 3px;
    background: #eee;
    font-size: 0.8em;
    font-weight: bold;
}
.badge-success { background: #d4edda; color: #155724; }
.alert {
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
}
.alert-error { background: #f8d7da; color: #721c24; }
.alert-success { background: #d4edda; color: #155724; }