body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 1000px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1, h2 {
    color: #333;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}
th {
    background-color: #007bff;
    color: white;
    padding: 10px;
}
td {
    padding: 8px;
    text-align: center;
}
.btn {
    display: inline-block;
    padding: 8px 15px;
    background: #28a745;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    margin: 5px;
    border: none;
    cursor: pointer;
}
.edit {
    color: #ffc107;
    text-decoration: none;
    margin-right: 10px;
}
.delete {
    color: #dc3545;
    text-decoration: none;
}
.actions {
    margin-bottom: 20px;
}
input[type="text"], input[type="number"], textarea {
    width: 80%;
    padding: 8px;
    margin: 8px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
}
label {
    font-weight: bold;
    display: inline-block;
    width: 80px;
}
.warning {
    margin-top: 20px;
    padding: 10px;
    background: #fff3cd;
    border: 1px solid #ffeeba;
    color: #856404;
    border-radius: 4px;
}
.tip {
    background: #e9ecef;
    padding: 8px;
    border-radius: 4px;
    font-size: 0.9em;
}