/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

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

/* 导航栏样式 */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
    font-size: 16px;
    transition: opacity 0.3s ease;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* 主内容样式 */
main {
    padding: 40px 0;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 30px;
    margin-bottom: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    /* 移除向上移动的动效 */
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.card h2 {
    margin-bottom: 20px;
    color: #444;
    font-size: 28px;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #555;
}

tr:hover {
    background-color: #f8f9fa;
}

/* 用户任务统计样式 */

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: #fff;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #e1e4e8;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    color: #333;
}

.close-btn {
    font-size: 28px;
    font-weight: bold;
    color: #666;
    text-decoration: none;
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: #333;
}

.modal-body {
    padding: 20px;
}

.modal-actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* 状态信息样式 */
.status-info {
    display: flex;
    align-items: center;
}

/* 按钮样式优化 */
.btn-sm {
    padding: 6px 12px;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.btn-danger {
    background-color: #dc3545;
    border-color: #dc3545;
}

.btn-danger:hover {
    background-color: #c82333;
    border-color: #bd2130;
}

.btn-success {
    background-color: #28a745;
    border-color: #28a745;
}

.btn-success:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

.btn-secondary {
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #545b62;
    border-color: #4e555b;
}

/* 表格单元格中的按钮组样式 */
table td form, table td a {
    margin-right: 5px;
    margin-bottom: 5px;
    display: inline-block;
}

/* 确保小屏幕上的按钮布局合理 */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .modal-actions .btn {
        width: 100%;
    }
}
.user-task-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.stat-item {
    text-align: center;
    flex: 1;
}

.stat-label {
    display: block;
    color: #666;
    font-size: 14px;
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: bold;
    color: #4CAF50;
}

/* 任务筛选按钮组 */
.task-filters {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* 小型按钮样式 */
.btn-sm {
    padding: 6px 12px;
    font-size: 14px;
    margin-right: 5px;
    margin-bottom: 5px;
}

.btn-sm.active {
    background-color: #4CAF50;
    color: white;
}

/* 无数据提示 */
.no-data {
    text-align: center;
    padding: 30px;
    color: #666;
    font-style: italic;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    text-decoration: none;
}

.btn:hover {
    background-color: #5a67d8;
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-success {
    background-color: #28a745;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: #dc3545;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-warning {
    background-color: #ffc107;
    color: #212529;
}

.btn-warning:hover {
    background-color: #e0a800;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: #667eea;
    outline: none;
}

/* 状态标签 */
.status-badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.status-available {
    background-color: #e3f2fd;
    color: #1976d2;
}

.status-claimed {
    background-color: #fff3e0;
    color: #f57c00;
}

.status-completed {
    background-color: #e8f5e9;
    color: #388e3c;
}

/* 登录注册页面样式 */
.auth-container {
    max-width: 500px;
    margin: 50px auto;
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #444;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
    }
    
    .nav-links {
        margin-top: 15px;
    }
    
    .nav-links a {
        margin: 0 10px;
    }
    
    table {
        display: block;
        overflow-x: auto;
    }
}

/* 页脚样式 - 已隐藏 */
footer {
    display: none;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}