/* 全局样式与响应式设计 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 20px;
}

h1 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

.nav a {
    text-decoration: none;
    color: #3498db;
    padding: 8px 16px;
    border-radius: 4px;
    background: #ecf0f1;
    transition: background 0.3s;
}

.nav a:hover {
    background: #bdc3c7;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

input, select, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

input[type="checkbox"] {
    width: auto;
    margin-right: 5px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
    margin-right: 10px;
    margin-bottom: 10px;
}

button.edit-btn {
    background-color: #f39c12;
}

button.edit-btn:hover {
    background-color: #e67e22;
}

button:hover {
    background-color: #2980b9;
}

button.danger {
    background-color: #e74c3c;
    width: 40px;
    font-size: 0.7rem;
    padding: 3px 0px 3px 0px;
    border-top-width: 23px;
    margin-top: 2px;
    margin-bottom: 2px;
 
}

button.danger:hover {
    background-color: #c0392b;
}

button.success {
    background-color: #27ae60;
}

button.success:hover {
    background-color: #2ecc71;
}

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    min-width: 200px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
}

tr:hover {
    background-color: #f1f1f1;
}

.card {
    background: #f9f9f9;
    border: 1px solid #eee;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 15px;
}

.flex-row {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: flex-end;
}

.flex-row .form-group {
    flex: 1 1 ;
    margin-bottom: 0;
}

.total-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #27ae60;
    margin: 15px 0;
}

/* 响应式 */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    h1 {
        font-size: 1.5rem;
    }
    .flex-row {
        flex-direction: column;
        align-items: stretch;
    }
    .flex-row .form-group {
        width: 100%;
    }
    button {
        width: 100%;
        margin-right: 0;
    }
    .nav a {
        flex: 1 1 auto;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    table {
        font-size: 0.6rem;
    }
    th, td {
        padding: 1px;
    }
}