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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: #f5f7fa;
}

.sidebar {
    width: 240px;
    background: linear-gradient(180deg, #1e3a8a 0%, #1e40af 100%);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    color: white;
    overflow-y: auto;
    transition: all 0.3s;
    z-index: 1000;
}

.sidebar-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h1 {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 5px;
}

.sidebar-header p {
    font-size: 12px;
    opacity: 0.8;
}

.menu-item {
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255,255,255,0.9);
}

.menu-item:hover {
    background: rgba(255,255,255,0.1);
    padding-left: 25px;
}

.menu-item.active {
    background: rgba(255,255,255,0.15);
    border-left: 3px solid #60a5fa;
}

.menu-item i {
    width: 20px;
    text-align: center;
}

.main-content {
    margin-left: 240px;
    min-height: 100vh;
    transition: all 0.3s;
}

.top-bar {
    background: white;
    padding: 15px 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 999;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.content-area {
    padding: 30px;
}

.page-header {
    margin-bottom: 25px;
}

.page-title {
    font-size: 24px;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 8px;
}

.page-subtitle {
    color: #6b7280;
    font-size: 14px;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card-header {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 15px;
    color: #1f2937;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    margin: 10px 0;
}

.stat-label {
    opacity: 0.9;
    font-size: 14px;
}

.btn {
    padding: 8px 16px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-primary {
    background: #3b82f6;
    color: white;
}

.btn-primary:hover {
    background: #2563eb;
}

.btn-success {
    background: #10b981;
    color: white;
}

.btn-warning {
    background: #f59e0b;
    color: white;
}

.btn-danger {
    background: #ef4444;
    color: white;
}

.badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: #f9fafb;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: #374151;
    border-bottom: 2px solid #e5e7eb;
}

td {
    padding: 12px;
    border-bottom: 1px solid #f3f4f6;
}

tr:hover {
    background: #f9fafb;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box input {
    width: 100%;
    padding: 8px 35px 8px 15px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
}

.search-box i {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
}

.hidden {
    display: none !important;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #ef4444;
    color: white;
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 10px;
    font-weight: bold;
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.icon-btn:hover {
    background: #f3f4f6;
}

.todo-item, .approval-item, .meeting-item, .announcement-item {
    padding: 12px;
    border-bottom: 1px solid #f3f4f6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.todo-item:hover, .approval-item:hover, .meeting-item:hover, .announcement-item:hover {
    background: #f9fafb;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3b82f6 0%, #8b5cf6 100%);
    transition: width 0.3s;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}