.header-nav {
    background: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
    padding: 0 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}
.nav-tabs {
    background: #f8f9fa;
    border-bottom: 1px solid #dee2e6;
    padding: 0;
}
.nav-tabs .tab a {
    color: #495057;
    font-weight: 500;
    padding: 15px 20px;
}
.nav-tabs .tab a.active {
    background-color: white;
    color: #4a5568;
    border-bottom: 3px solid #4a5568;
}
.stats-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}
.stats-card:hover {
    transform: translateY(-2px);
}
.stats-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 5px;
}
.stats-label {
    color: #6c757d;
    font-size: 0.9rem;
}
.attendance-record {
    background: white;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid #28a745;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.attendance-record.late {
    border-left-color: #ffc107;
}
.attendance-record.absent {
    border-left-color: #dc3545;
}
.time-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}
.status-normal { background: #d4edda; color: #155724; }
.status-late { background: #fff3cd; color: #856404; }
.status-overtime { background: #cce5ff; color: #0056b3; }
.status-absent { background: #f8d7da; color: #721c24; }
.calendar-view {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.calendar-day {
    border: 1px solid #dee2e6;
    min-height: 80px;
    padding: 5px;
    position: relative;
}
.calendar-day.today {
    background: #e3f2fd;
}
.calendar-day.weekend {
    background: #f8f9fa;
}
.attendance-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    position: absolute;
    top: 5px;
    right: 5px;
}
.dot-normal { background: #28a745; }
.dot-late { background: #ffc107; }
.dot-absent { background: #dc3545; }
.time-display {
    font-size: 1.1rem;
    font-weight: 500;
    color: #495057;
}
.work-duration {
    color: #6c757d;
    font-size: 0.9rem;
}
.filter-section {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.chart-container {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}
.tc{
    text-align: center;
}
.card_1_color{
    color:#4CAF50 !important
}
.card_2_color{
    color:#ff9800 !important
}
.card_3_color{
    color:#2196F3 !important
}
.card_4_color{
    color:#F44336 !important
}