/* 任务推系统 - 现代化UI样式 */

/* ===== 全局变量定义 ===== */
:root {
    /* 主色调 */
    --primary-color: #667eea;
    --primary-dark: #5a6fd8;
    --primary-light: #7c8ef0;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    
    /* 功能色彩 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* 中性色彩 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 布局变量 */
    --sidebar-width: 280px;
    --header-height: 70px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 动画 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 全局样式重置 ===== */
* {
    box-sizing: border-box;
}

/* 限定body样式到特定页面作用域 */
.admin-page body,
.admin-login-page body,
.main-tasks-page body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--gray-50) 0%, #fdfbfb 100%);
    color: var(--gray-800);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* 为index页面和用户页面提供基础样式 */
.index-page,
.user-page {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* ===== 导航栏样式 ===== */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%) !important;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    border: none;
    padding: 0.75rem 0;
    transition: var(--transition);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
    text-decoration: none;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--accent-color) !important;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active,
.navbar .dropdown-menu { /* Added .navbar .dropdown-menu for z-index */
    color: white !important;
    background: rgba(255, 255, 255, 0.15);
    z-index: 1050; /* Ensure dropdown is above other elements */
    backdrop-filter: blur(10px);
    transform: translateY(-1px);
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.navbar-nav .nav-link:hover::before {
    left: 100%;
}

/* ===== 侧边栏样式 (管理后台) ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    z-index: 1000;
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
}

.sidebar-brand {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.sidebar-nav {
    padding: 1.5rem 0;
}

.sidebar .nav-item {
    padding: 0.25rem 1.5rem;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.sidebar .nav-link i {
    margin-right: 0.75rem;
    width: 1.25rem;
    text-align: center;
    font-size: 1.1rem;
}

/* ===== 主内容区域 ===== */
.content {
    margin-left: var(--sidebar-width);
    padding: 2rem;
    min-height: 100vh;
    background: var(--gray-50);
}

.main-content {
    padding: 2rem;
    background: var(--gray-50);
    min-height: calc(100vh - var(--header-height));
}

/* ===== 卡片样式 ===== */
.card {
    background: white;
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    border-bottom: 1px solid var(--gray-200);
    padding: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

/* ===== 按钮样式 ===== */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-color) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #d97706 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: white;
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #2563eb 100%);
    color: white;
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* ===== 表单样式 ===== */
.form-control {
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    transition: var(--transition);
    background: white;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-select {
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* ===== 表格样式 ===== */
.table {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table thead th {
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-50) 100%);
    border: none;
    font-weight: 600;
    color: var(--gray-700);
    padding: 1rem;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.table tbody td {
    border: none;
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-100);
}

.table tbody tr:hover {
    background: var(--gray-50);
    transform: scale(1.01);
    transition: var(--transition);
}

/* ===== 徽章样式 ===== */
.badge {
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.badge-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
}

.badge-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #d97706 100%);
    color: white;
}

.badge-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: white;
}

/* ===== 卡片头部样式 ===== */
.card-header.bg-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%) !important;
    border-bottom: none;
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(0,0,0,.125);
}

.card-title {
    margin-bottom: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.hover-lift {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

/* ===== 警告框样式 ===== */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
}

.alert-success {
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
    color: #065f46;
    border-left-color: var(--success-color);
}

.alert-warning {
    background: linear-gradient(135deg, #fffbeb 0%, #fefce8 100%);
    color: #92400e;
    border-left-color: var(--warning-color);
}

.alert-danger {
    background: linear-gradient(135deg, #fef2f2 0%, #fef1f1 100%);
    color: #991b1b;
    border-left-color: var(--danger-color);
}

.alert-info {
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
    color: #1e40af;
    border-left-color: var(--info-color);
}

/* ===== 模态框样式 ===== */
.modal-content {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.modal-header {
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    border-bottom: 1px solid var(--gray-200);
    padding: 1.5rem;
}

.modal-title {
    font-weight: 600;
    color: var(--gray-800);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

/* ===== 分页样式 ===== */
.pagination .page-link {
    border: none;
    color: var(--primary-color);
    padding: 0.75rem 1rem;
    margin: 0 0.25rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.pagination .page-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination .page-item.active .page-link {
    background: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

/* ===== 进度条样式 ===== */
.progress {
    height: 0.75rem;
    border-radius: var(--border-radius-sm);
    background: var(--gray-200);
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    transition: var(--transition);
}

/* ===== 任务卡片特殊样式 ===== */
.task-card {
    border: 1px solid var(--gray-200);
    background: white;
    transition: box-shadow 0.2s ease;
}

.task-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.task-card .card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
}

.task-card .badge {
    background: #10b981;
    color: white;
    font-weight: 500;
}

/* ===== 统计卡片样式 ===== */
.stats-card {
    background: linear-gradient(135deg, white 0%, var(--gray-50) 100%);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.stats-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stats-card .card-body {
    padding: 2rem;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 加载动画 ===== */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: var(--transition);
}

.spinner-border {
    width: 3rem;
    height: 3rem;
    border: 0.25rem solid var(--gray-200);
    border-top: 0.25rem solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .content {
        margin-left: 0;
        padding: 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .card-header {
        padding: 1rem;
    }
    
    .table thead th,
    .table tbody td {
        padding: 0.75rem 0.5rem;
        font-size: 0.875rem;
    }
}

/* ===== 自定义滚动条 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
}

/* ===== 动画效果 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* ===== 特殊效果 ===== */
.glass-effect {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ===== 网格布局样式 ===== */
.task-grid {
    margin-top: 2rem;
    padding: 1rem 0;
}

.stats-grid {
    display: flex; /* Changed from grid to flex */
    flex-wrap: wrap; /* Allow cards to wrap to the next line if needed */
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* ===== 任务卡片增强样式 ===== */
.task-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.task-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.task-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.task-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.task-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
}

.task-body {
    padding: 1.5rem;
    flex-grow: 1;
}

.task-description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 0;
}

.task-footer {
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.task-info {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex-grow: 1;
}

.task-publisher {
    color: var(--gray-500);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* ===== 统计卡片增强样式 ===== */
.stats-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    min-height: 100px;
}

.stats-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
}

.stats-card.stats-primary::before {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.stats-card.stats-success::before {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
}

.stats-card.stats-warning::before {
    background: linear-gradient(135deg, var(--warning-color) 0%, #d97706 100%);
}

.stats-card.stats-info::before {
    background: linear-gradient(135deg, var(--info-color) 0%, #2563eb 100%);
}

.stats-card.stats-secondary::before {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
}

.stats-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stats-icon {
    width: 50px; /* Reduced width */
    height: 50px; /* Reduced height */
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border-radius: var(--border-radius-sm); /* Adjusted border-radius */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem; /* Reduced font-size */
    color: white;
    margin-right: 1rem; /* Reduced margin */
    flex-shrink: 0;
}

.stats-number {
    font-size: 1.75rem; /* Reduced font-size */
    font-weight: 700;
    color: var(--gray-800);
    margin: 0;
    line-height: 1;
}

.stats-label {
    color: var(--gray-600);
    font-size: 0.75rem; /* Reduced font-size */
    font-weight: 500;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.15rem; /* Adjusted margin-top */
}

.stats-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stats-info-wrapper {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
}

.stats-main-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex-grow: 1;
}

.stats-detail {
    color: var(--gray-500);
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stats-trend {
    color: var(--gray-500);
    font-size: 0.75rem;
}

/* ===== 认证页面样式 ===== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, #fdfbfb 100%);
}

.auth-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 2.5rem;
    width: 100%;
    max-width: 450px;
    border: 1px solid var(--gray-200);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin: 0 auto 1.5rem;
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: var(--gray-600);
    font-size: 1rem;
    margin-bottom: 0;
}

.auth-form {
    margin-bottom: 2rem;
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
}

.auth-form .form-label {
    color: var(--gray-700);
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.btn-auth {
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
    font-weight: 600;
}

.auth-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.auth-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.auth-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ===== 响应式网格布局 ===== */
@media (max-width: 768px) {
    .task-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .auth-card {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .task-footer {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .task-grid {
        margin-top: 1rem;
    }
    
    .stats-grid {
        margin-bottom: 1rem;
    }
    
    .task-header {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
    }
    
    .task-body {
        padding: 1rem;
    }
    
    .stats-content {
        padding: 1rem;
    }
    
    .stats-number {
        font-size: 1.5rem;
    }
}

/* ===== 工具类 ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.shadow-custom {
    box-shadow: var(--shadow-lg);
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%) 1;
}

.rounded-custom {
    border-radius: var(--border-radius);
}

.transition-custom {
    transition: var(--transition);
}