/* ==========================================
   看板系统 v2.0 样式
   ========================================== */

/* CSS变量 */
:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #3498db;
    
    --bg-color: #f5f7fa;
    --sidebar-bg: #2c3e50;
    --sidebar-dark: #1a252f;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #bdc3c7;
    --border-color: #e0e6ed;
    
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --header-height: 60px;
    
    --transition-speed: 0.3s;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

/* 暗色主题 */
[data-theme="dark"] {
    --bg-color: #0f1419;
    --sidebar-bg: #15202b;
    --sidebar-dark: #0d1117;
    --card-bg: #1e2732;
    --text-primary: #e7e9ea;
    --text-secondary: #8b98a5;
    --text-light: #536471;
    --border-color: #2f3b47;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.screen {
    min-height: 100vh;
}

/* ==========================================
   登录界面
   ========================================== */
.login-box {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.login-box h1 {
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 28px;
}

.login-box p {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.login-box input {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 16px;
    transition: border-color 0.3s;
}

.login-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.login-box button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.login-box button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.error {
    color: var(--danger-color);
    margin-top: 12px;
    font-size: 14px;
}

/* ==========================================
   应用布局 - 侧边栏模式
   ========================================== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--sidebar-dark) 0%, var(--sidebar-bg) 100%);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: width var(--transition-speed) ease;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
}

.logo i {
    color: var(--primary-color);
    font-size: 24px;
}

.sidebar-toggle {
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.3s;
}

.sidebar-toggle:hover {
    background: rgba(255,255,255,0.2);
}

/* 侧边栏导航 - 简化版 */
.sidebar-nav {
    flex: 1;
    padding: 10px 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 15px;
}

.nav-section-title {
    padding: 0 20px;
    margin-bottom: 6px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: rgba(255, 255, 255, 0.35);
    display: none; /* 默认隐藏分类标题，减少噪音 */
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin: 2px 8px;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    font-size: 14px;
}

.nav-item a:hover {
    background: rgba(255,255,255,0.08);
    color: white;
}

.nav-item.active a {
    background: rgba(102, 126, 234, 0.25);
    color: white;
    border-left: 3px solid var(--primary-color);
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 18px;
}

/* 侧边栏底部 - 简化版 */
.sidebar-footer {
    padding: 12px 15px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.user-details {
    flex: 1;
}

.user-name {
    font-weight: 500;
    font-size: 13px;
}

.user-role {
    font-size: 11px;
    color: rgba(255,255,255,0.5);
    display: none; /* 隐藏角色，减少噪音 */
}

.logout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px;
    background: rgba(255,255,255,0.05);
    color: rgba(255,255,255,0.7);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
    font-size: 13px;
}

.logout-btn:hover {
    background: rgba(231, 76, 60, 0.6);
    color: white;
}

/* 侧边栏折叠状态 */
.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .user-details,
.sidebar.collapsed .logout-btn span {
    display: none;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
}

.sidebar.collapsed .nav-item {
    margin: 4px 5px;
}

.sidebar.collapsed .nav-item a {
    justify-content: center;
    padding: 12px;
}

.sidebar.collapsed .user-info {
    justify-content: center;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-speed) ease;
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed);
}

/* 顶部栏 */
.top-bar {
    height: var(--header-height);
    background: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
}

.breadcrumb {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-color);
    padding: 8px 16px;
    border-radius: 20px;
}

.search-box i {
    color: var(--text-secondary);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 14px;
    width: 200px;
}

.header-date {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* 内容区域 */
.content-area {
    padding: 30px;
}

/* 视图切换 */
.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.view-header h2 {
    font-size: 24px;
    color: var(--text-primary);
}

/* ==========================================
   仪表盘
   ========================================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stats-card {
    background: white;
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stats-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stats-icon.todo { background: linear-gradient(135deg, #667eea, #764ba2); color: white; }
.stats-icon.progress { background: linear-gradient(135deg, #f39c12, #e67e22); color: white; }
.stats-icon.done { background: linear-gradient(135deg, #2ecc71, #27ae60); color: white; }
.stats-icon.diary { background: linear-gradient(135deg, #3498db, #2980b9); color: white; }

.stats-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.stats-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.dashboard-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.dashboard-section {
    background: white;
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.dashboard-section h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 16px;
    color: var(--text-primary);
}

.today-widget {
    text-align: center;
    padding: 30px;
}

.today-date {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.today-stats {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.recent-list {
    max-height: 300px;
    overflow-y: auto;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-sm);
    transition: background 0.3s;
}

.recent-item:hover {
    background: var(--bg-color);
}

.recent-item .status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.recent-item .status-dot.todo { background: var(--primary-color); }
.recent-item .status-dot.inprogress { background: var(--warning-color); }
.recent-item .status-dot.done { background: var(--success-color); }

/* ==========================================
   任务看板
   ========================================== */
.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    min-height: 500px;
}

.column {
    background: white;
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.column h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 16px;
    color: var(--text-primary);
    padding-bottom: 15px;
    border-bottom: 2px solid var(--bg-color);
}

.task-list {
    min-height: 300px;
}

.task-card {
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 12px;
    cursor: grab;
    border-left: 3px solid var(--primary-color);
    transition: all 0.3s;
}

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

.task-card.dragging {
    opacity: 0.6;
    transform: rotate(3deg);
}

.task-card-header {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.task-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    margin-top: 2px;
    accent-color: var(--primary-color);
}

.task-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    flex: 1;
}

.task-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 优先级标签 */
.task-priority {
    font-size: 14px;
    padding: 2px 8px;
    border-radius: 12px;
    color: white;
    font-weight: 500;
    flex-shrink: 0;
}

.priority-high {
    background: #e74c3c;
}

.priority-medium {
    background: #f39c12;
}

.priority-low {
    background: #3498db;
}

/* 截止日期样式 */
.task-meta.overdue {
    color: #e74c3c;
    font-weight: 600;
}

.task-meta.due-soon {
    color: #f39c12;
    font-weight: 500;
}

/* 表单行布局 */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.task-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.btn-icon {
    background: var(--bg-color);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s;
}

.btn-icon:hover {
    background: var(--primary-color);
    color: white;
}

/* ==========================================
   日历视图
   ========================================== */
.calendar-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

#calendar-current-month {
    font-size: 18px;
    font-weight: 600;
    min-width: 150px;
    text-align: center;
}

.calendar-container {
    background: white;
    border-radius: var(--radius-md);
    padding: 25px;
    box-shadow: var(--shadow-sm);
}

.calendar-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    margin-bottom: 10px;
}

.calendar-weekday {
    text-align: center;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 10px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.calendar-day:hover {
    background: var(--bg-color);
}

.calendar-day.other-month {
    color: var(--text-light);
}

.calendar-day.today {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
}

.calendar-day.has-task::after {
    content: '';
    position: absolute;
    bottom: 5px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--warning-color);
}

.calendar-day-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    background: var(--primary-color);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.calendar-day.selected {
    box-shadow: inset 0 0 0 2px var(--primary-color);
}

/* ==========================================
   日期详情面板
   ========================================== */
.date-detail-panel {
    background: white;
    border-radius: var(--radius-md);
    margin-top: 20px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.date-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.date-detail-header h4 {
    font-size: 16px;
}

.date-detail-content {
    padding: 20px;
}

.date-section {
    margin-bottom: 20px;
}

.date-section:last-child {
    margin-bottom: 0;
}

.date-section h5 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.badge {
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
}

.date-tasks-list {
    max-height: 200px;
    overflow-y: auto;
}

.date-task-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}

.date-task-item .status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.date-task-item .status-dot.todo { background: var(--primary-color); }
.date-task-item .status-dot.inprogress { background: var(--warning-color); }
.date-task-item .status-dot.done { background: var(--success-color); }

.date-task-item .task-title {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
}

.date-diary-content {
    padding: 15px;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    min-height: 80px;
}

.date-empty {
    text-align: center;
    padding: 20px;
    color: var(--text-light);
}

/* ==========================================
   日记
   ========================================== */
.diary-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-height: 600px;
}

.diary-sidebar {
    background: var(--bg-color);
    border-right: 1px solid var(--border-color);
}

.diary-sidebar-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.diary-sidebar-header h2 {
    font-size: 16px;
}

.diary-list {
    max-height: calc(100vh - 200px);
    overflow-y: auto;
    padding: 10px;
}

.diary-item {
    padding: 14px;
    background: white;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: all 0.3s;
}

.diary-item:hover {
    border-left-color: var(--primary-color);
    transform: translateX(5px);
}

.diary-item.active {
    border-left-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.diary-item-date {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

.diary-item-preview {
    font-size: 12px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.diary-main {
    padding: 30px;
}

.diary-editor-header {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.diary-editor input[type="date"],
.diary-editor select {
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

.diary-editor textarea {
    width: 100%;
    min-height: 400px;
    padding: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 20px;
}

.diary-actions {
    display: flex;
    gap: 12px;
}

.diary-view-content {
    padding: 20px;
}

.empty-state {
    text-align: center;
    padding: 100px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.3;
}

/* ==========================================
   按钮样式
   ========================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    padding: 10px 20px;
    background: var(--bg-color);
    color: var(--text-primary);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--border-color);
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 1024px) {
    .board {
        grid-template-columns: 1fr;
    }
    
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
    
    /* 看板视图移动端优化 */
    .batch-toolbar {
        flex-direction: column;
        gap: 12px;
        padding: 12px 15px;
    }
    
    .batch-actions {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .top-bar {
        padding: 0 15px;
    }
    
    .content-area {
        padding: 15px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .diary-container {
        grid-template-columns: 1fr;
    }
    
    .diary-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        max-height: 300px;
    }
    
    /* 移动端侧边栏按钮 */
    .sidebar-toggle {
        display: block;
    }
    
    /* 移动端搜索框优化 */
    .search-box {
        width: 100%;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .header-actions {
        gap: 10px;
    }
    
    /* 移动端看板列 */
    .board {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .column {
        min-height: auto;
    }
    
    .column h2 {
        font-size: 14px;
        padding-bottom: 10px;
    }
    
    .task-list {
        min-height: 200px;
    }
    
    .task-card {
        padding: 12px;
    }
    
    .task-actions {
        margin-top: 10px;
    }
    
    .btn-icon {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    /* 移动端仪表盘 */
    .stats-card {
        padding: 16px;
        gap: 12px;
    }
    
    .stats-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .stats-value {
        font-size: 24px;
    }
    
    .stats-label {
        font-size: 12px;
    }
    
    /* 移动端视图标题 */
    .view-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
    
    .view-header h2 {
        font-size: 20px;
    }
    
    /* 移动端按钮 */
    .btn-primary {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    /* 移动端通知 */
    .notification {
        left: 10px;
        right: 10px;
        top: 70px;
        padding: 12px 16px;
        font-size: 13px;
    }
}

/* ==========================================
   小屏幕优化
   ========================================== */
@media (max-width: 480px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .content-area {
        padding: 10px;
    }
    
    .stats-card {
        flex-direction: column;
        text-align: center;
    }
    
    .calendar-weekday {
        font-size: 12px;
        padding: 8px 4px;
    }
    
    .modal-content {
        padding: 20px;
        width: 95%;
    }
    
    .modal-content input,
    .modal-content textarea {
        padding: 10px;
        font-size: 14px;
    }
    
    .diary-editor-header {
        flex-direction: column;
    }
    
    .diary-editor input[type="date"],
    .diary-editor select {
        width: 100%;
    }
}

/* ==========================================
   移动端侧边栏开关按钮
   ========================================== */
.mobile-sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    box-shadow: var(--shadow-lg);
    z-index: 99;
    cursor: pointer;
    font-size: 20px;
    transition: transform 0.3s;
}

.mobile-sidebar-toggle:hover {
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .mobile-sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ==========================================
   批量操作工具栏
   ========================================== */
.batch-toolbar {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    border: 1px solid var(--primary-color);
}

.batch-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.batch-info input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.batch-info span {
    font-weight: 600;
    color: var(--primary-color);
}

.batch-actions {
    display: flex;
    gap: 10px;
}

.batch-actions .btn-secondary {
    padding: 8px 12px;
    font-size: 14px;
}

/* ==========================================
   任务筛选
   ========================================== */
.task-filter {
    position: relative;
}

.filter-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 140px;
    z-index: 100;
    overflow: hidden;
}

.filter-option {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 14px;
}

.filter-option:hover {
    background: var(--bg-color);
}

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

/* ==========================================
   加载动画
   ========================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 骨架屏动画 */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 16px;
    margin-bottom: 10px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 15px;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

/* ==========================================
   动画
   ========================================== */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.shake {
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ==========================================
   任务详情和聊天面板
   ========================================== */
.task-detail-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    height: calc(100vh - 40px);
    max-height: 100vh;
    background: white;
    box-shadow: -5px 0 25px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s ease, width 0.1s;
    border-radius: 12px 0 0 12px;
    margin-top: 20px;
    margin-bottom: 20px;
}

/* 左侧调整大小的手柄 */
.resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    background: linear-gradient(90deg, var(--primary-color) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: 4px 0 0 4px;
}

.task-detail-panel:hover .resize-handle,
.resize-handle:hover,
.resize-handle:active {
    opacity: 1;
}

.task-detail-panel.active {
    transform: translateX(0);
}

.task-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.task-detail-header h3 {
    font-size: 18px;
}

.close-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: background 0.3s;
}

.close-btn:hover {
    background: rgba(255,255,255,0.3);
}

.task-detail-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.task-info-section {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.task-info-section h4 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.task-info-row {
    display: flex;
    margin-bottom: 12px;
    align-items: flex-start;
}

.info-label {
    width: 80px;
    color: var(--text-secondary);
    font-size: 14px;
    flex-shrink: 0;
}

.info-value {
    color: var(--text-primary);
    font-size: 14px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-badge.todo { background: rgba(102, 126, 234, 0.15); color: #667eea; }
.status-badge.inprogress { background: rgba(243, 156, 18, 0.15); color: #f39c12; }
.status-badge.done { background: rgba(46, 204, 113, 0.15); color: #2ecc71; }

.task-description {
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.6;
    margin-top: 5px;
}

/* 聊天区域 */
.chat-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-color);
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: white;
    border-bottom: 1px solid var(--border-color);
}

.chat-header h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-primary);
}

.message-count {
    font-size: 12px;
    color: var(--text-secondary);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.chat-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-light);
}

.chat-empty i {
    font-size: 48px;
    margin-bottom: 10px;
    opacity: 0.5;
}

.chat-message {
    margin-bottom: 15px;
    animation: fadeIn 0.3s ease;
}

.chat-message .message-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 5px;
}

.chat-message .sender {
    font-weight: 600;
    font-size: 13px;
    color: var(--primary-color);
}

.chat-message .timestamp {
    font-size: 11px;
    color: var(--text-light);
}

.chat-message .message-content {
    background: white;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-left: 25px;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.5;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.chat-message .message-content::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 15px;
    border: 4px solid transparent;
    border-right-color: white;
}

.chat-message.self {
    text-align: right;
}

.chat-message.self .message-content {
    margin-left: 0;
    margin-right: 25px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.chat-message.self .message-content::before {
    left: auto;
    right: -8px;
    border-right-color: transparent;
    border-left-color: var(--primary-color);
}

.chat-message.self .sender {
    color: var(--secondary-color);
}

.chat-input-area {
    display: flex;
    gap: 10px;
    padding: 15px;
    background: white;
    border-top: 1px solid var(--border-color);
}

.chat-input-area input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
}

.chat-input-area input:focus {
    border-color: var(--primary-color);
}

.chat-input-area button {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 遮罩层 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}

.task-detail-panel.active ~ .modal-overlay,
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 响应式 */
@media (max-width: 500px) {
    .task-detail-panel {
        width: 100%;
    }
}

/* ==========================================
   Modal 通用样式
   ========================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: var(--radius-md);
    max-width: 500px;
    width: 90%;
}

.modal-content h3 {
    margin-bottom: 20px;
    font-size: 20px;
    color: var(--text-primary);
}

.modal-content input,
.modal-content textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 15px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.modal-content input:focus,
.modal-content textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.modal-content textarea {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 20px;
}

.modal-actions button {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.modal-actions .btn-save {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.modal-actions .btn-cancel {
    background: var(--bg-color);
    color: var(--text-primary);
}

/* ===== 团队进度视图 - 优化版 ===== */
.team-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    padding: 0;
}

.team-member {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform 0.25s, box-shadow 0.25s;
    border: 1px solid var(--border-color);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.member-header {
    display: flex;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, #fafbfc 0%, #ffffff 100%);
    position: relative;
}

.member-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.member-avatar {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-right: 14px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.member-info {
    flex: 1;
}

.member-info h3 {
    margin: 0 0 4px 0;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
}

.member-role {
    font-size: 13px;
    color: var(--text-secondary);
}

.member-status {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: #f0f2f5;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.member-status.online {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
}

.member-status.online::before {
    content: '● ';
    color: #28a745;
}

.member-status.working {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeeba 100%);
    color: #856404;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.member-tasks {
    padding: 16px 20px;
    min-height: 120px;
    max-height: 200px;
    overflow-y: auto;
}

.member-tasks .task-item {
    display: flex;
    align-items: center;
    padding: 12px 14px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 10px;
    margin-bottom: 10px;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.member-tasks .task-item:hover {
    background: #f0f2f5;
    border-left-color: var(--primary-color);
}

.member-tasks .task-item:last-child {
    margin-bottom: 0;
}

.member-tasks .task-item.empty {
    background: transparent;
    color: var(--text-light);
    font-style: italic;
    justify-content: center;
    padding: 20px;
}

.task-status {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    margin-right: 10px;
}

.task-status.todo {
    background: #e9ecef;
    color: var(--text-secondary);
}

.task-status.inprogress {
    background: #cce5ff;
    color: #004085;
}

.task-status.done {
    background: #d4edda;
    color: #155724;
}

.task-title {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
}

.member-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    background: #f8f9fa;
}

.task-count {
    font-size: 12px;
    color: var(--text-secondary);
}

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

.last-update {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==========================================
   v3.0 新增样式 - 优先级、标签、截止日期
   ========================================== */

/* 任务模态框增强 */
.task-modal-v3 {
    min-width: 480px;
}

.task-modal-v3 .form-group {
    margin-bottom: 16px;
}

.task-modal-v3 .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.task-modal-v3 .form-group label .required {
    color: var(--danger-color);
}

.task-modal-v3 .form-group label .hint {
    font-weight: normal;
    color: var(--text-light);
    font-size: 11px;
}

.task-modal-v3 .form-row {
    display: flex;
    gap: 16px;
}

.task-modal-v3 .form-group.half {
    flex: 1;
}

.task-modal-v3 input,
.task-modal-v3 textarea,
.task-modal-v3 select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: border-color 0.2s;
}

.task-modal-v3 input:focus,
.task-modal-v3 textarea:focus,
.task-modal-v3 select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.task-modal-v3 textarea {
    min-height: 80px;
    resize: vertical;
}

/* 优先级选择器 */
.priority-select {
    cursor: pointer;
}

/* 优先级徽章 */
.priority-badge {
    margin-right: 6px;
    font-size: 12px;
}

/* 任务卡片优先级边框 */
.task-card.priority-high {
    border-left: 3px solid #e53935;
}

.task-card.priority-medium {
    border-left: 3px solid #fb8c00;
}

.task-card.priority-low {
    border-left: 3px solid #43a047;
}

/* 任务标签 */
.task-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 8px 0;
}

.task-tag {
    display: inline-block;
    padding: 2px 8px;
    background: linear-gradient(135deg, #667eea15, #764ba215);
    color: var(--primary-color);
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
}

/* 过期任务样式 */
.task-meta.overdue {
    font-weight: 500;
}

.overdue-badge {
    display: inline-block;
    padding: 1px 6px;
    background: #ffebee;
    color: #e53935;
    border-radius: 4px;
    font-size: 10px;
    margin-left: 6px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* 筛选工具栏增强 */
.filter-toolbar {
    display: flex;
    gap: 12px;
    padding: 12px 16px;
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
}

.filter-toolbar .filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-toolbar .filter-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.filter-toolbar select,
.filter-toolbar .filter-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-toolbar select:focus,
.filter-toolbar .filter-btn:focus {
    outline: none;
    border-color: var(--primary-color);
}

.filter-toolbar .filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 通知样式 */
.notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 20px;
    background: var(--success-color);
    color: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .task-modal-v3 {
        min-width: auto;
    }
    
    .task-modal-v3 .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .filter-toolbar {
        flex-wrap: wrap;
    }
}
<!-- News Widget Styles -->
<style>
.dashboard-section .news-widget {
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}
.dashboard-section .news-list {
    max-height: 250px;
    overflow-y: auto;
}
.dashboard-section .news-item {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s;
}
.dashboard-section .news-item:hover {
    background: var(--bg-color);
}
.dashboard-section .news-item:last-child {
    border-bottom: none;
}
.dashboard-section .news-item-title {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.dashboard-section .news-item-meta {
    display: flex;
    gap: 10px;
    font-size: 11px;
    color: var(--text-secondary);
}
.dashboard-section .news-item-source {
    color: var(--primary-color);
    font-weight: 500;
}
.dashboard-section .news-loading {
    padding: 20px;

/* Phase 1 改进样式 */

/* 图标按钮 */
.icon-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

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

/* 筛选下拉菜单 */
.filter-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 45px;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 1000;
    display: none;
    animation: dropdownFadeIn 0.2s ease;
}

.dropdown-menu.show {
    display: block;
}

@keyframes dropdownFadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.dropdown-header {
    padding: 12px 16px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.tag-list {
    padding: 12px;
    max-height: 200px;
    overflow-y: auto;
}

.tag-filter-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.tag-filter-item:hover {
    background: var(--bg-color);
}

.tag-filter-item.active {
    background: var(--primary-color);
    color: white;
}

.tag-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

/* 卡片动效 */
.task-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
}

.task-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.task-card {
    animation: cardFadeIn 0.4s ease backwards;
}

@keyframes cardFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 暗色主题切换按钮图标 */
[data-theme="dark"] #theme-toggle .fa-moon::before {
    content: "\f185";
}

/* 主题切换按钮样式增强 */
#theme-toggle {
    position: relative;
    transition: all 0.3s ease;
}

#theme-toggle:hover {
    transform: scale(1.1);
}

#theme-toggle:active {
    transform: scale(0.95);
}

/* 暗色模式下的切换按钮 */
[data-theme="dark"] #theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] #theme-toggle i {
    color: #ffd93d;
}

/* header-actions 布局优化 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-box {
    background: var(--card-bg);
}

/* 筛选下拉菜单 - 移动端优化 */
.filter-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 45px;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 1000;
    display: none;
    animation: dropdownFadeIn 0.2s ease;
}

.dropdown-menu.show {
    display: block;
}

/* 移动端筛选菜单优化 */
@media (max-width: 768px) {
    .dropdown-menu {
        position: fixed !important;
        top: auto !important;
        bottom: 70px !important;
        right: 10px !important;
        left: 10px !important;
        width: auto !important;
        min-width: auto !important;
        max-height: 50vh !important;
        overflow-y: auto !important;
        border-radius: 12px !important;
        box-shadow: 0 -4px 20px rgba(0,0,0,0.2) !important;
    }

    .dropdown-header {
        padding: 14px 16px !important;
        font-size: 15px !important;
        border-bottom: 1px solid var(--border-color) !important;
    }

    .tag-list {
        padding: 10px !important;
        max-height: 200px !important;
        overflow-y: auto !important;
    }

    .tag-filter-item {
        padding: 12px !important;
        font-size: 14px !important;
        border-radius: 8px !important;
        margin-bottom: 4px !important;
    }

    .tag-filter-item:active {
        background: var(--primary-color) !important;
        color: white !important;
    }
}

@media (max-width: 374px) {
    .dropdown-menu {
        bottom: 66px !important;
        right: 8px !important;
        left: 8px !important;
    }

    .dropdown-header {
        padding: 12px 14px !important;
        font-size: 14px !important;
    }

    .tag-filter-item {
        padding: 10px !important;
        font-size: 13px !important;
    }
}

/* Phase 2 改进样式 */

/* 子任务样式 */
.subtasks-container {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.subtask-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.subtask-item:hover {
    background: var(--bg-color);
}

.subtask-item.completed {
    text-decoration: line-through;
    opacity: 0.6;
}

.subtask-checkbox {
    width: 16px;
    height: 16px;
    border: 2px solid var(--text-light);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.subtask-checkbox.checked {
    background: var(--success-color);
    border-color: var(--success-color);
}

.add-subtask-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    font-size: 12px;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.2s;
}

.add-subtask-btn:hover {
    color: var(--primary-color);
}

/* 看板模版选择器 */
.template-selector {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
}

.template-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s;
}

.template-btn:hover {
    transform: scale(1.1);
}

.template-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.template-modal.show {
    display: flex;
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 600px;
}

.template-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.template-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.template-card h4 {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.template-card p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 响应式移动端 */
@media (max-width: 768px) {
    .app-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100% !important;
        position: fixed;
        bottom: 0;
        top: auto;
        height: 60px;
        z-index: 100;
    }

    .sidebar-header .logo-text,
    .nav-text,
    .nav-section-title,
    .team-name {
        display: none;
    }

    .sidebar-header {
        justify-content: center;
    }

    .nav-list {
        display: flex;
        justify-content: space-around;
        padding: 0;
    }

    .nav-list li {
        margin: 0;
    }

    .main-content {
        margin-bottom: 60px;
    }

    .kanban-board {
        flex-direction: column;
    }

    .kanban-column {
        min-width: 100%;
        margin-bottom: 16px;
    }

    /* 移动端确保暗色模式按钮可见 */
    .header-actions {
        gap: 8px;
        display: flex !important;
    }

    .search-box {
        display: none;
    }

    /* 主题切换按钮 - 移动端优化 */
    #theme-toggle {
        display: flex !important;
        width: 40px !important;
        height: 40px !important;
        min-width: 40px !important;
        background: var(--card-bg) !important;
        border-radius: 50% !important;
        box-shadow: 0 2px 8px rgba(0,0,0,0.15) !important;
    }

    #theme-toggle i {
        font-size: 18px !important;
    }

    /* 筛选按钮 - 移动端优化 */
    #tag-filter-btn {
        display: flex !important;
        width: 40px !important;
        height: 40px !important;
        min-width: 40px !important;
        background: var(--card-bg) !important;
        border-radius: 50% !important;
    }

    .task-card {
        margin-bottom: 12px;
    }

    .template-selector {
        bottom: 80px;
    }
}

@media (max-width: 480px) {
    .kanban-column-header {
        padding: 12px;
    }
    
    .task-card {
        padding: 12px;
    }
    
    .task-title {
        font-size: 14px;
    }
}

/* 修复移动端适配 */
@media (max-width: 768px) {
    html, body {
        overflow-x: hidden;
    }
    
    .app-layout {
        display: flex !important;
        flex-direction: column !important;
        padding-bottom: 70px !important;
    }
    
    /* 侧边栏改为底部导航 */
    .sidebar {
        width: 100% !important;
        position: fixed !important;
        bottom: 0 !important;
        top: auto !important;
        left: 0 !important;
        height: 60px !important;
        z-index: 9999 !important;
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 0 !important;
        box-shadow: 0 -2px 10px rgba(0,0,0,0.1) !important;
    }
    
    .sidebar-header,
    .sidebar-nav,
    .sidebar-footer {
        display: none !important;
    }
    
    /* 底部导航栏 */
    .sidebar::before {
        content: '';
        display: flex !important;
        position: absolute;
        width: 100%;
        height: 100%;
        background: var(--sidebar-bg);
    }
    
    .nav-list {
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-around !important;
        width: 100% !important;
        padding: 0 10px !important;
    }
    
    .nav-list li {
        flex: 1 !important;
        text-align: center !important;
    }
    
    .nav-list li a {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 8px 4px !important;
        font-size: 10px !important;
    }
    
    .nav-list li a i {
        font-size: 18px !important;
        margin-bottom: 2px !important;
    }
    
    .nav-list li a .nav-text {
        display: block !important;
        font-size: 9px !important;
    }
    
    /* 顶部栏 */
    .top-bar {
        padding: 10px 12px !important;
        height: 50px !important;
    }
    
    .header-actions {
        gap: 6px !important;
    }
    
    .search-box {
        display: none !important;
    }
    
    .header-date {
        font-size: 11px !important;
    }
    
    /* 主内容区 */
    .main-content {
        margin-left: 0 !important;
        margin-bottom: 60px !important;
        padding: 10px !important;
    }
    
    /* 看板列 */
    .kanban-board {
        flex-direction: column !important;
        gap: 12px !important;
    }
    
    .kanban-column {
        width: 100% !important;
        min-width: 100% !important;
        margin-bottom: 12px !important;
    }
    
    .kanban-column-header {
        padding: 10px 12px !important;
    }
    
    /* 任务卡片 */
    .task-card {
        padding: 10px 12px !important;
        margin-bottom: 8px !important;
    }
    
    .task-title {
        font-size: 13px !important;
    }
    
    .task-meta {
        flex-wrap: wrap !important;
        gap: 6px !important;
    }
    
    /* 模板按钮 */
    .template-selector {
        bottom: 80px !important;
        right: 15px !important;
    }
    
    .template-btn {
        width: 45px !important;
        height: 45px !important;
    }
    
    /* 仪表盘 */
    .dashboard-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }
    
    .stats-card {
        padding: 12px !important;
    }
    
    /* 模态框 */
    .template-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 10px !important;
        padding: 15px !important;
    }
    
    .template-card {
        padding: 15px !important;
    }
}

@media (max-width: 480px) {
    .top-bar {
        padding: 8px 10px !important;
    }

    .breadcrumb {
        font-size: 13px !important;
    }

    .icon-btn {
        width: 32px !important;
        height: 32px !important;
    }

    .kanban-column-title {
        font-size: 13px !important;
    }

    .task-tags {
        flex-wrap: wrap !important;
    }

    .task-tag {
        font-size: 10px !important;
        padding: 2px 6px !important;
    }
}

/* ========== 超小屏幕优化 (< 375px) - iPhone SE ========== */
@media (max-width: 374px) {
    /* 顶部栏 */
    .top-bar {
        padding: 6px 8px !important;
        height: 48px !important;
    }

    .breadcrumb {
        font-size: 12px !important;
    }

    .header-actions {
        gap: 6px !important;
    }

    /* 主题切换按钮 - 超小屏 */
    #theme-toggle,
    #tag-filter-btn {
        width: 36px !important;
        height: 36px !important;
        min-width: 36px !important;
    }

    #theme-toggle i,
    #tag-filter-btn i {
        font-size: 16px !important;
    }

    .header-date {
        display: none !important;
    }

    /* 主内容区 */
    .content-area {
        padding: 8px !important;
    }

    /* 仪表盘 */
    .dashboard-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 8px !important;
    }

    .stats-card {
        padding: 10px !important;
        gap: 8px !important;
    }

    .stats-icon {
        width: 40px !important;
        height: 40px !important;
        font-size: 16px !important;
    }

    .stats-value {
        font-size: 20px !important;
    }

    .stats-label {
        font-size: 10px !important;
    }

    /* 看板 */
    .board {
        gap: 10px !important;
    }

    .column {
        padding: 12px !important;
    }

    .column h2 {
        font-size: 13px !important;
        padding-bottom: 8px !important;
        margin-bottom: 12px !important;
    }

    .task-card {
        padding: 10px !important;
        margin-bottom: 8px !important;
    }

    .task-title {
        font-size: 12px !important;
    }

    .task-meta {
        font-size: 10px !important;
    }

    .task-priority {
        font-size: 11px !important;
        padding: 1px 6px !important;
    }

    .task-tags {
        gap: 4px !important;
    }

    .task-tag {
        font-size: 9px !important;
        padding: 1px 4px !important;
    }

    .task-actions {
        margin-top: 8px !important;
        gap: 4px !important;
    }

    .btn-icon {
        width: 28px !important;
        height: 28px !important;
        font-size: 12px !important;
    }

    /* 视图标题 */
    .view-header {
        flex-direction: column !important;
        gap: 8px !important;
        align-items: flex-start !important;
        margin-bottom: 16px !important;
    }

    .view-header h2 {
        font-size: 16px !important;
    }

    /* 按钮 */
    .btn-primary {
        padding: 8px 12px !important;
        font-size: 12px !important;
    }

    .btn-secondary {
        padding: 8px 12px !important;
        font-size: 12px !important;
    }

    /* 侧边栏底部导航 */
    .sidebar {
        height: 56px !important;
    }

    .nav-list li a {
        padding: 6px 2px !important;
    }

    .nav-list li a i {
        font-size: 16px !important;
        margin-bottom: 1px !important;
    }

    .nav-list li a .nav-text {
        font-size: 8px !important;
    }

    .main-content {
        margin-bottom: 56px !important;
    }

    /* 模态框 */
    .modal-content {
        padding: 16px !important;
        width: 96% !important;
    }

    .modal-content h3 {
        font-size: 16px !important;
        margin-bottom: 12px !important;
    }

    .modal-content input,
    .modal-content textarea,
    .modal-content select {
        padding: 10px !important;
        font-size: 13px !important;
        margin-bottom: 10px !important;
    }

    .modal-actions {
        flex-direction: column !important;
        gap: 8px !important;
        margin-top: 16px !important;
    }

    .modal-actions button {
        width: 100% !important;
    }

    /* 日历 */
    .calendar-weekday {
        font-size: 10px !important;
        padding: 6px 2px !important;
    }

    .calendar-day {
        font-size: 12px !important;
    }

    .calendar-day-badge {
        font-size: 8px !important;
        padding: 1px 4px !important;
    }

    /* 团队视图 */
    .team-container {
        gap: 12px !important;
    }

    .team-member {
        border-radius: 12px !important;
    }

    .member-header {
        padding: 12px !important;
    }

    .member-avatar {
        width: 40px !important;
        height: 40px !important;
        font-size: 20px !important;
    }

    .member-info h3 {
        font-size: 14px !important;
    }

    .member-role {
        font-size: 11px !important;
    }

    .member-status {
        padding: 4px 10px !important;
        font-size: 10px !important;
    }

    .member-tasks {
        padding: 10px !important;
    }

    .member-tasks .task-item {
        padding: 8px 10px !important;
        font-size: 12px !important;
    }

    /* 模板按钮 */
    .template-selector {
        bottom: 70px !important;
        right: 12px !important;
    }

    .template-btn {
        width: 40px !important;
        height: 40px !important;
        font-size: 16px !important;
    }

    /* 日记 */
    .diary-main {
        padding: 16px !important;
    }

    .diary-editor textarea {
        min-height: 250px !important;
        padding: 12px !important;
        font-size: 14px !important;
    }

    /* 任务详情面板 */
    .task-detail-panel {
        width: 100% !important;
        margin-top: 0 !important;
        margin-bottom: 0 !important;
        border-radius: 16px 16px 0 0 !important;
        height: 85vh !important;
        top: auto !important;
        bottom: 0 !important;
    }

    .task-detail-header {
        padding: 14px !important;
    }

    .task-detail-header h3 {
        font-size: 15px !important;
    }

    .close-btn {
        width: 32px !important;
        height: 32px !important;
    }

    .task-info-section {
        padding: 14px !important;
    }

    .chat-input-area {
        padding: 10px !important;
    }

    .chat-input-area input {
        padding: 10px 12px !important;
        font-size: 13px !important;
    }

    .chat-input-area button {
        width: 38px !important;
        height: 38px !important;
    }

    /* 暗色模式 - 超小屏 */
    [data-theme="dark"] #theme-toggle {
        background: var(--card-bg) !important;
    }
}

/* ========== 小屏幕优化 (375px - 414px) ========== */
@media (min-width: 375px) and (max-width: 413px) {
    .top-bar {
        padding: 8px 10px !important;
        height: 52px !important;
    }

    .breadcrumb {
        font-size: 14px !important;
    }

    .content-area {
        padding: 10px !important;
    }

    .dashboard-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 10px !important;
    }

    .stats-card {
        padding: 12px !important;
    }

    .stats-icon {
        width: 44px !important;
        height: 44px !important;
    }

    .stats-value {
        font-size: 22px !important;
    }

    .column {
        padding: 14px !important;
    }

    .column h2 {
        font-size: 14px !important;
    }

    .task-card {
        padding: 12px !important;
    }

    .task-title {
        font-size: 13px !important;
    }

    .sidebar {
        height: 58px !important;
    }

    .nav-list li a i {
        font-size: 17px !important;
    }

    .nav-list li a .nav-text {
        font-size: 9px !important;
    }
}

/* ========== 中屏幕优化 (414px - 640px) ========== */
@media (min-width: 414px) and (max-width: 639px) {
    .content-area {
        padding: 12px !important;
    }

    .dashboard-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 12px !important;
    }

    .column {
        padding: 16px !important;
    }

    .sidebar {
        height: 60px !important;
    }
}

/* ========== 横屏优化 ========== */
@media (max-height: 500px) and (orientation: landscape) {
    .top-bar {
        height: 44px !important;
        padding: 4px 12px !important;
    }

    .breadcrumb {
        font-size: 14px !important;
    }

    .content-area {
        padding: 8px 12px !important;
    }

    .dashboard-grid {
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 8px !important;
        margin-bottom: 16px !important;
    }

    .stats-card {
        padding: 10px !important;
        gap: 8px !important;
    }

    .stats-icon {
        width: 36px !important;
        height: 36px !important;
        font-size: 14px !important;
    }

    .stats-value {
        font-size: 18px !important;
    }

    .stats-label {
        font-size: 10px !important;
    }

    .board {
        gap: 12px !important;
    }

    .column {
        padding: 10px !important;
    }

    .column h2 {
        font-size: 13px !important;
        margin-bottom: 10px !important;
    }

    .task-card {
        padding: 8px !important;
        margin-bottom: 6px !important;
    }

    .sidebar {
        height: 50px !important;
    }

    .nav-list li a {
        padding: 4px 2px !important;
    }

    .nav-list li a i {
        font-size: 16px !important;
    }

    .main-content {
        margin-bottom: 50px !important;
    }
}

/* ========== 触摸设备优化 ========== */
@media (hover: none) and (pointer: coarse) {
    /* 增大点击区域 */
    .nav-item a {
        min-height: 44px !important;
    }

    .btn-primary,
    .btn-secondary {
        min-height: 44px !important;
    }

    .icon-btn {
        min-width: 44px !important;
        min-height: 44px !important;
    }

    #theme-toggle,
    #tag-filter-btn {
        min-width: 44px !important;
        min-height: 44px !important;
    }

    .task-card {
        cursor: pointer !important;
    }

    /* 防止文本选择 */
    .task-title,
    .nav-text {
        -webkit-user-select: none;
        user-select: none;
    }
}

/* ========== 暗色模式移动端增强 ========== */
@media (max-width: 768px) {
    [data-theme="dark"] .top-bar {
        background: var(--card-bg) !important;
        border-bottom: 1px solid var(--border-color) !important;
    }

    [data-theme="dark"] .sidebar {
        box-shadow: 0 -2px 10px rgba(0,0,0,0.3) !important;
    }

    [data-theme="dark"] #theme-toggle,
    [data-theme="dark"] #tag-filter-btn {
        background: var(--card-bg) !important;
        border: 1px solid var(--border-color) !important;
    }

    [data-theme="dark"] .dropdown-menu {
        background: var(--card-bg) !important;
        border-color: var(--border-color) !important;
    }

    [data-theme="dark"] .modal-content {
        background: var(--card-bg) !important;
        color: var(--text-primary) !important;
    }

    [data-theme="dark"] .task-detail-panel {
        background: var(--card-bg) !important;
    }

    [data-theme="dark"] .login-box {
        background: var(--card-bg) !important;
        color: var(--text-primary) !important;
    }

    [data-theme="dark"] .login-box input {
        background: var(--bg-color) !important;
        border-color: var(--border-color) !important;
        color: var(--text-primary) !important;
    }
}