* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: #2c3e50;
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-radius: 5px;
}

.user-info a {
    color: #3498db;
    text-decoration: none;
}

main {
    background: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    background: #3498db;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background: #2980b9;
}

.booking-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.booking-table th,
.booking-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.booking-table th {
    background-color: #f8f9fa;
}

.btn-approve {
    background: #27ae60;
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 4px;
    margin-right: 0.5rem;
}

.btn-reject {
    background: #e74c3c;
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 4px;
}

.occupancy-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #eee;
}

.occupancy-calendar {
    margin-top: 1rem;
}

.occupancy-item {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background-color: #f8f9fa;
    border-left: 4px solid #3498db;
    border-radius: 4px;
}

.occupancy-item.rejected {
    border-left-color: #e74c3c;
}

.occupancy-item.pending {
    border-left-color: #f39c12;
}

.message {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    main {
        padding: 1rem;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .booking-table {
        font-size: 0.8rem;
        display: block;
        overflow-x: auto;
    }
    
    .booking-table th,
    .booking-table td {
        padding: 0.5rem;
    }
    
    header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
}