/* 基础重置和变量定义 */
:root {
    /* 主色调 - 蓝色和粉色 */
    --primary-blue: #3b82f6;
    --primary-blue-light: #60a5fa;
    --primary-blue-dark: #1d4ed8;
    --primary-pink: #ec4899;
    --primary-pink-light: #f472b6;
    --primary-pink-dark: #db2777;
    
    /* 点缀色 - 绿色 */
    --accent-green: #10b981;
    --accent-green-light: #34d399;
    --accent-green-dark: #059669;
    
    /* 中性色 */
    --neutral-50: #f9fafb;
    --neutral-100: #f3f4f6;
    --neutral-200: #e5e7eb;
    --neutral-300: #d1d5db;
    --neutral-400: #9ca3af;
    --neutral-500: #6b7280;
    --neutral-600: #4b5563;
    --neutral-700: #374151;
    --neutral-800: #1f2937;
    --neutral-900: #111827;
    
    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* 布局 */
    --sidebar-width: 280px;
    --topbar-height: 70px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* 暗色主题变量 */
[data-theme="dark"] {
    --neutral-50: #111827;
    --neutral-100: #1f2937;
    --neutral-200: #374151;
    --neutral-300: #4b5563;
    --neutral-400: #6b7280;
    --neutral-500: #9ca3af;
    --neutral-600: #d1d5db;
    --neutral-700: #e5e7eb;
    --neutral-800: #f3f4f6;
    --neutral-900: #f9fafb;
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--neutral-50);
    color: var(--neutral-800);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

[data-theme="dark"] body {
    background-color: var(--neutral-50);
    color: var(--neutral-800);
}

/* 加载动画 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

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

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

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

.loading-spinner p {
    font-size: 1.1rem;
    font-weight: 500;
}

/* 应用容器 */
.app-container {
    display: flex;
    min-height: 100vh;
    opacity: 0;
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--neutral-900), var(--neutral-800));
    color: var(--neutral-100);
    display: flex;
    flex-direction: column;
    padding: 24px 0;
    position: fixed;
    height: 100vh;
    z-index: 100;
    box-shadow: var(--shadow-xl);
}

.sidebar-header {
    padding: 0 24px 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo-icon {
    font-size: 28px;
    color: var(--primary-blue-light);
    background: rgba(59, 130, 246, 0.1);
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--primary-blue-light), var(--primary-pink-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--neutral-400);
    margin-left: 60px;
}

/* 侧边栏导航 */
.sidebar-nav {
    flex: 1;
    padding: 24px 0;
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-left: 4px solid transparent;
}

.nav-item i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
    color: var(--neutral-400);
}

.nav-item span {
    font-weight: 500;
    color: var(--neutral-300);
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-left-color: var(--primary-blue);
}

.nav-item:hover i,
.nav-item:hover span {
    color: var(--primary-blue-light);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.15), transparent);
    border-left-color: var(--primary-blue);
}

.nav-item.active i {
    color: var(--primary-blue-light);
}

.nav-item.active span {
    color: white;
    font-weight: 600;
}

/* 侧边栏底部 */
.sidebar-footer {
    padding: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-pink));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.user-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: white;
}

.user-info p {
    font-size: 0.875rem;
    color: var(--neutral-400);
}

.btn-add-task {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-pink));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-add-task:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background-color: var(--neutral-50);
}

/* 顶部栏 */
.topbar {
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--neutral-200);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 90;
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .topbar {
    background: var(--neutral-100);
    border-bottom-color: var(--neutral-200);
}

.search-bar {
    flex: 1;
    max-width: 500px;
    position: relative;
}

.search-bar i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--neutral-400);
}

.search-bar input {
    width: 100%;
    padding: 12px 20px 12px 48px;
    border: 2px solid var(--neutral-200);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    background-color: var(--neutral-50);
    color: var(--neutral-800);
    transition: all var(--transition-fast);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

.btn-notification {
    position: relative;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--neutral-600);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.btn-notification:hover {
    background-color: var(--neutral-100);
    color: var(--primary-blue);
}

.badge {
    position: absolute;
    top: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary-pink), var(--accent-green));
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-theme-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--neutral-600);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.btn-theme-toggle:hover {
    background-color: var(--neutral-100);
    color: var(--primary-blue);
}

.current-date {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    font-size: 0.875rem;
}

.current-date #current-date {
    font-weight: 600;
    color: var(--neutral-800);
}

.current-date #current-time {
    color: var(--neutral-500);
    font-size: 0.8rem;
}

/* 页面内容区 */
.page-content {
    padding: 32px;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: slideIn 0.3s ease;
}

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

.page-header {
    margin-bottom: 32px;
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: 8px;
}

.page-header p {
    color: var(--neutral-600);
    font-size: 1.1rem;
}

/* 仪表盘网格 */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

/* 统计卡片 */
.stats-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

[data-theme="dark"] .stats-card {
    background: var(--neutral-100);
}

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

.stats-card.blue {
    border-color: var(--primary-blue-light);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), white);
}

.stats-card.pink {
    border-color: var(--primary-pink-light);
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.05), white);
}

.stats-card.green {
    border-color: var(--accent-green-light);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), white);
}

.stats-card.purple {
    border-color: #8b5cf6;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), white);
}

.stats-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.stats-card.blue .stats-icon {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: white;
}

.stats-card.pink .stats-icon {
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-pink-dark));
    color: white;
}

.stats-card.green .stats-icon {
    background: linear-gradient(135deg, var(--accent-green), var(--accent-green-dark));
    color: white;
}

.stats-card.purple .stats-icon {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    color: white;
}

.stats-info h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--neutral-600);
    margin-bottom: 8px;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--neutral-900);
}

/* 卡片通用样式 */
.card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

[data-theme="dark"] .card {
    background: var(--neutral-100);
}

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

.card-header {
    padding: 24px;
    border-bottom: 1px solid var(--neutral-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--neutral-900);
}

.btn-view-all,
.btn-add-alarm {
    background: none;
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-view-all:hover,
.btn-add-alarm:hover {
    background-color: var(--primary-blue);
    color: white;
}

.card-body {
    padding: 24px;
}

/* 任务列表和提醒列表 */
.task-list,
.alarms-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.task-item,
.alarm-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background-color: var(--neutral-50);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-blue);
    transition: all var(--transition-fast);
}

.task-item:hover,
.alarm-item:hover {
    background-color: var(--neutral-100);
    transform: translateX(4px);
}

.task-item.completed {
    border-left-color: var(--accent-green);
    opacity: 0.7;
}

.task-item.high-priority {
    border-left-color: var(--primary-pink);
}

.task-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: 4px;
}

.task-info p {
    font-size: 0.875rem;
    color: var(--neutral-600);
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.875rem;
    color: var(--neutral-500);
}

.task-meta i {
    margin-right: 4px;
}

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

.btn-action {
    background: none;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-action.edit {
    color: var(--primary-blue);
}

.btn-action.edit:hover {
    background-color: rgba(59, 130, 246, 0.1);
}

.btn-action.delete {
    color: var(--error);
}

.btn-action.delete:hover {
    background-color: rgba(239, 68, 68, 0.1);
}

.btn-action.complete {
    color: var(--accent-green);
}

.btn-action.complete:hover {
    background-color: rgba(16, 185, 129, 0.1);
}

/* 日历预览 */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.calendar-day:hover {
    background-color: var(--neutral-100);
}

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

.calendar-day.has-task {
    position: relative;
}

.calendar-day.has-task::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background-color: var(--accent-green);
    border-radius: 50%;
}

.month-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-prev,
.btn-next {
    background: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--neutral-600);
    transition: all var(--transition-fast);
}

.btn-prev:hover,
.btn-next:hover {
    background-color: var(--neutral-100);
    color: var(--primary-blue);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease;
}

[data-theme="dark"] .modal-content {
    background: var(--neutral-100);
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }
    
    .main-content {
        margin-left: 240px;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .topbar {
        padding: 0 16px;
    }
    
    .page-content {
        padding: 16px;
    }
    
    .stats-card {
        padding: 20px;
    }
    
    .stats-number {
        font-size: 2rem;
    }
}

/* 任务管理页面 */
.task-management {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.task-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.btn-add-task-full {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-pink));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-add-task-full:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.task-filters {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.task-filters select {
    padding: 8px 12px;
    border: 2px solid var(--neutral-200);
    border-radius: var(--border-radius-sm);
    background-color: white;
    color: var(--neutral-800);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.task-filters select:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.task-table-container {
    overflow-x: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.task-table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
}

[data-theme="dark"] .task-table {
    background-color: var(--neutral-100);
}

.task-table thead {
    background-color: var(--neutral-100);
    border-bottom: 2px solid var(--neutral-200);
}

[data-theme="dark"] .task-table thead {
    background-color: var(--neutral-200);
}

.task-table th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: var(--neutral-700);
    white-space: nowrap;
}

.task-table tbody tr {
    border-bottom: 1px solid var(--neutral-200);
    transition: all var(--transition-fast);
}

.task-table tbody tr:hover {
    background-color: var(--neutral-50);
}

.task-table td {
    padding: 16px;
    vertical-align: middle;
}

.task-title strong {
    display: block;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: 4px;
}

.task-title small {
    font-size: 0.875rem;
    color: var(--neutral-600);
    display: block;
}

.task-category {
    padding: 4px 12px;
    background-color: var(--neutral-100);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--neutral-700);
}

.task-priority {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
}

.task-priority.high {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.task-priority.medium {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.task-priority.low {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

.task-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
}

.task-status.pending {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

.task-status.completed {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.table-actions {
    display: flex;
    gap: 8px;
}

.btn-table {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    background-color: var(--neutral-100);
    color: var(--neutral-600);
}

.btn-table:hover {
    background-color: var(--neutral-200);
}

.btn-table.complete:hover {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.btn-table.edit:hover {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

.btn-table.delete:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

/* 闹钟管理页面 */
.alarm-management {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.alarm-controls {
    display: flex;
    justify-content: flex-start;
}

.btn-add-alarm-full {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-blue));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-add-alarm-full:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(236, 72, 153, 0.3);
}

.alarm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.alarm-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
}

[data-theme="dark"] .alarm-card {
    background: var(--neutral-100);
}

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

.alarm-card.active {
    border-left: 4px solid var(--accent-green);
}

.alarm-card.inactive {
    border-left: 4px solid var(--neutral-300);
    opacity: 0.7;
}

.alarm-card-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--neutral-200);
}

.alarm-card-header h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--neutral-900);
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--neutral-300);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-green);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.alarm-card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.alarm-time,
.alarm-repeat,
.alarm-sound {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--neutral-700);
}

.alarm-time i,
.alarm-repeat i,
.alarm-sound i {
    width: 20px;
    color: var(--primary-blue);
}

.alarm-card-footer {
    padding: 20px;
    display: flex;
    gap: 12px;
    border-top: 1px solid var(--neutral-200);
}

.btn-alarm {
    flex: 1;
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-alarm.edit {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
    border: 1px solid var(--primary-blue);
}

.btn-alarm.edit:hover {
    background-color: var(--primary-blue);
    color: white;
}

.btn-alarm.delete {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
}

.btn-alarm.delete:hover {
    background-color: var(--error);
    color: white;
}

/* 模态框样式 */
.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--neutral-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neutral-900);
}

.btn-close {
    background: none;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--neutral-500);
    transition: all var(--transition-fast);
}

.btn-close:hover {
    background-color: var(--neutral-100);
    color: var(--neutral-700);
}

.modal-body {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--neutral-700);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--neutral-200);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    background-color: white;
    color: var(--neutral-800);
    transition: all var(--transition-fast);
}

[data-theme="dark"] .form-group input[type="text"],
[data-theme="dark"] .form-group input[type="date"],
[data-theme="dark"] .form-group input[type="time"],
[data-theme="dark"] .form-group select,
[data-theme="dark"] .form-group textarea {
    background-color: var(--neutral-200);
    border-color: var(--neutral-300);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group input[type="checkbox"] {
    margin-right: 8px;
}

.modal-footer {
    padding: 24px;
    border-top: 1px solid var(--neutral-200);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.btn-secondary {
    padding: 12px 24px;
    background-color: var(--neutral-100);
    color: var(--neutral-700);
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background-color: var(--neutral-200);
}

.btn-primary {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-pink));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    border-radius: var(--border-radius);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1100;
    transform: translateX(100%);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    max-width: 350px;
}

[data-theme="dark"] .notification {
    background: var(--neutral-100);
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification i {
    font-size: 1.25rem;
}

.notification.success i {
    color: var(--success);
}

.notification.info i {
    color: var(--info);
}

.notification.warning i {
    color: var(--warning);
}

.notification.error i {
    color: var(--error);
}

.notification span {
    flex: 1;
    font-weight: 500;
    color: var(--neutral-800);
}

.notification button {
    background: none;
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--neutral-500);
    transition: all var(--transition-fast);
}

.notification button:hover {
    background-color: var(--neutral-100);
    color: var(--neutral-700);
}

/* 设置页面 */
.settings-container {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

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

[data-theme="dark"] .settings-section {
    background: var(--neutral-100);
}

.settings-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-section h3 i {
    color: var(--primary-blue);
}

.settings-group {
    margin-bottom: 20px;
}

.settings-group:last-child {
    margin-bottom: 0;
}

.settings-group label {
    display: block;
    font-weight: 500;
    color: var(--neutral-700);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.settings-group input[type="checkbox"] {
    margin-right: 8px;
}

.theme-options {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.theme-option {
    padding: 12px 20px;
    background-color: var(--neutral-100);
    border: 2px solid var(--neutral-200);
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-option:hover {
    border-color: var(--primary-blue);
    background-color: rgba(59, 130, 246, 0.05);
}

.theme-option.active {
    border-color: var(--primary-blue);
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

.color-options {
    display: flex;
    gap: 16px;
}

.color-option {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 3px solid transparent;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.active {
    border-color: var(--neutral-700);
    box-shadow: var(--shadow-sm);
}

.btn-export,
.btn-import,
.btn-clear {
    padding: 12px 24px;
    background-color: var(--neutral-100);
    color: var(--neutral-700);
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-right: 12px;
    margin-bottom: 8px;
}

.btn-export:hover {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.btn-import:hover {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

.btn-clear:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.about-info {
    line-height: 1.8;
}

.about-info p {
    margin-bottom: 8px;
    color: var(--neutral-700);
}

.about-info strong {
    color: var(--neutral-900);
}

/* 日历页面样式 */
.calendar-container {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

[data-theme="dark"] .calendar-container {
    background: var(--neutral-100);
}

.calendar-header {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--neutral-200);
}

.calendar-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.calendar-nav h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neutral-900);
    min-width: 180px;
    text-align: center;
}

.btn-prev-year,
.btn-prev-month,
.btn-next-month,
.btn-next-year {
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--neutral-600);
    transition: all var(--transition-fast);
}

.btn-prev-year:hover,
.btn-prev-month:hover,
.btn-next-month:hover,
.btn-next-year:hover {
    background-color: var(--neutral-100);
    color: var(--primary-blue);
}

.btn-today {
    padding: 10px 20px;
    background-color: var(--primary-blue);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-today:hover {
    background-color: var(--primary-blue-dark);
    transform: translateY(-2px);
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    padding: 16px;
    background-color: var(--neutral-100);
    border-bottom: 1px solid var(--neutral-200);
    font-weight: 600;
    color: var(--neutral-700);
    text-align: center;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background-color: var(--neutral-200);
    padding: 1px;
}

.calendar-day {
    aspect-ratio: 1;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

[data-theme="dark"] .calendar-day {
    background-color: var(--neutral-100);
}

.calendar-day:hover {
    background-color: var(--neutral-50);
    transform: scale(1.05);
    z-index: 1;
    box-shadow: var(--shadow-sm);
}

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

.calendar-day.has-task::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--accent-green);
    border-radius: 50%;
}

.calendar-day.empty {
    background-color: var(--neutral-50);
    cursor: default;
}

[data-theme="dark"] .calendar-day.empty {
    background-color: var(--neutral-200);
}

.calendar-day.empty:hover {
    background-color: var(--neutral-50);
    transform: none;
    box-shadow: none;
}

/* 增强的响应式设计 */
@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .alarm-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .alarm-grid {
        grid-template-columns: 1fr;
    }
    
    .task-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .task-filters {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .calendar-header {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }
    
    .calendar-nav {
        justify-content: center;
    }
    
    .btn-today {
        width: 100%;
    }
    
    .modal-content {
        margin: 10px;
        max-width: calc(100% - 20px);
    }
    
    .page-header h2 {
        font-size: 1.5rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .topbar {
        padding: 0 12px;
    }
    
    .page-content {
        padding: 16px 12px;
    }
    
    .stats-card {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .stats-icon {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }
    
    .stats-number {
        font-size: 2rem;
    }
    
    .card-header {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .card-header h3 {
        text-align: center;
    }
    
    .btn-view-all,
    .btn-add-alarm {
        width: 100%;
    }
    
    .task-item,
    .alarm-item {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .task-actions {
        justify-content: center;
    }
    
    .task-table th,
    .task-table td {
        padding: 12px 8px;
        font-size: 0.9rem;
    }
    
    .table-actions {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .alarm-card-footer {
        flex-direction: column;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .btn-secondary,
    .btn-primary {
        width: 100%;
    }
    
    .theme-options {
        flex-direction: column;
    }
    
    .theme-option {
        justify-content: center;
    }
}

/* 打印样式 */
@media print {
    .sidebar,
    .topbar,
    .btn-add-task,
    .btn-add-task-full,
    .btn-add-alarm,
    .btn-add-alarm-full,
    .btn-theme-toggle,
    .btn-notification,
    .task-actions,
    .table-actions,
    .alarm-card-footer,
    .modal,
    .notification {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    body {
        background-color: white !important;
        color: black !important;
    }
    
    .app-container {
        display: block;
    }
    
    .card,
    .stats-card,
    .task-table,
    .calendar-container {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* 无障碍访问改进 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --primary-blue: #0066cc;
        --primary-pink: #cc0066;
        --accent-green: #008800;
    }
    
    .stats-card {
        border: 2px solid currentColor;
    }
    
    .task-item,
    .alarm-item {
        border-left-width: 6px;
    }
}

/* 工具类 */
.hidden {
    display: none !important;
}

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

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-5 { margin-top: 20px; }

.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-5 { margin-bottom: 20px; }

.p-1 { padding: 4px; }
.p-2 { padding: 8px; }
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-5 { padding: 20px; }

/* 焦点样式改进 */
:focus-visible {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--neutral-100);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--neutral-300);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--neutral-400);
}

/* 选择文本样式 */
::selection {
    background-color: rgba(59, 130, 246, 0.3);
    color: var(--neutral-900);
}