:root {
    --primary-color: #007bff;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
}

body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Task Cards */
.task-card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.task-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

/* Status-based card styling */
.task-card.pending {
    border-left: 4px solid var(--warning-color);
}

.task-card.in-progress {
    border-left: 4px solid var(--info-color);
}

.task-card.completed {
    border-left: 4px solid var(--success-color);
    opacity: 0.8;
}

.task-card.overdue {
    border-left: 4px solid var(--danger-color);
    background-color: #fff5f5;
}

/* Priority Badges */
.priority-badge {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.priority-low {
    background-color: #d4edda;
    color: #155724;
}

.priority-medium {
    background-color: #fff3cd;
    color: #856404;
}

.priority-high {
    background-color: #f8d7da;
    color: #721c24;
}

.priority-urgent {
    background-color: #dc3545;
    color: white;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        opacity: 1;
    }
}

/* Task Details */
.task-details {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #dee2e6;
}

.task-details i {
    width: 20px;
    margin-right: 5px;
    color: var(--primary-color);
}

/* Statistics Cards */
.stat-card {
    border-radius: 10px;
    border: none;
    padding: 15px;
    text-align: center;
}

.stat-card h2 {
    margin: 10px 0 0;
    font-weight: bold;
}

/* Modal Styling */
.modal-content {
    border-radius: 15px;
    border: none;
}

.modal-header {
    background-color: var(--primary-color);
    color: white;
    border-radius: 15px 15px 0 0;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

/* Form Styling */
.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.3rem;
}

.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #ced4da;
    padding: 0.5rem 0.75rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
}

/* Button Styling */
.btn {
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
    transform: translateY(-1px);
}

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

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

/* Filter Section */
.filter-section {
    background-color: white;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .task-card {
        margin-bottom: 15px;
    }
    
    .stat-card {
        margin-bottom: 10px;
    }
    
    .filter-section .col-md-4,
    .filter-section .col-md-3,
    .filter-section .col-md-2 {
        margin-bottom: 10px;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}

/* Animation for new tasks */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.task-card {
    animation: slideIn 0.3s ease-out;
}

/* Category Badges */
.category-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    color: white;
    margin-left: 5px;
}

/* Empty State Styling */
.empty-state {
    text-align: center;
    padding: 50px 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.empty-state i {
    font-size: 3rem;
    color: #dee2e6;
    margin-bottom: 20px;
}

.empty-state h3 {
    color: #6c757d;
    margin-bottom: 10px;
}

/* Tooltip Customization */
.tooltip-inner {
    background-color: var(--primary-color);
    border-radius: 5px;
    padding: 5px 10px;
}

.tooltip.bs-tooltip-top .tooltip-arrow::before {
    border-top-color: var(--primary-color);
}