:root {
    --card-border-radius: 1rem;
    --card-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.1);
    --card-hover-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.15);
    --card-transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --primary-color: #1b6ec2;
    --danger-color: #dc3545;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
}

/* Card Base Styles */
.card {
    position: relative;
    border: none;
    border-radius: var(--card-border-radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: var(--card-transition);
    margin-bottom: 1.5rem;
    background-color: #ffffff;
}

.card:hover {
    box-shadow: var(--card-hover-shadow);
    transform: translateY(-5px);
}

/* Card Header Styles */
.card-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    background-color: rgba(0, 0, 0, 0.02);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h5, .card-header .card-title {
    margin-bottom: 0;
    font-weight: 600;
    font-size: 1.1rem;
    color: #333;
}

.card-header .card-tools {
    display: flex;
    gap: 0.5rem;
}

/* Card Body Styles */
.card-body {
    padding: 1.5rem;
}

/* Card Footer Styles */
.card-footer {
    background-color: rgba(0, 0, 0, 0.02);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1rem 1.5rem;
}

/* Card Variants */
.card.border-primary {
    border-left: 4px solid var(--primary-color) !important;
}

.card.border-danger {
    border-left: 4px solid var(--danger-color) !important;
}

.card.border-success {
    border-left: 4px solid var(--success-color) !important;
}

.card.border-warning {
    border-left: 4px solid var(--warning-color) !important;
}

.card.border-info {
    border-left: 4px solid var(--info-color) !important;
}

/* Card with Background */
.card.bg-primary, .card-header.bg-primary {
    background: linear-gradient(135deg, var(--primary-color), #4a8ed8) !important;
    color: white;
}

.card.bg-danger, .card-header.bg-danger {
    background: linear-gradient(135deg, var(--danger-color), #e74c3c) !important;
    color: white;
}

.card.bg-success, .card-header.bg-success {
    background: linear-gradient(135deg, var(--success-color), #2ecc71) !important;
    color: white;
}

/* Resizable Cards */
.ui-resizable-handle {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 3px;
    transition: all 0.2s ease;
}

.ui-resizable-handle:hover {
    background: #e9ecef;
}

.ui-resizable-se {
    width: 12px;
    height: 12px;
    background: #6c757d;
    border-radius: 50%;
    right: 5px;
    bottom: 5px;
}

.ui-resizable-se:hover {
    background: #495057;
    transform: scale(1.2);
}

/* Card List Groups */
.card .list-group {
    max-height: 300px;
    overflow-y: auto;
    border-radius: 0;
}

.card .list-group-item {
    border-left: none;
    border-right: none;
    padding: 0.75rem 1.25rem;
    transition: background-color 0.2s ease;
}

.card .list-group-item:first-child {
    border-top: none;
}

.card .list-group-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* Custom Scrollbar for Lists */
.card .list-group::-webkit-scrollbar {
    width: 6px;
}

.card .list-group::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.card .list-group::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
    transition: background 0.2s ease;
}

.card .list-group::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Card Animations */
@keyframes cardPulse {
    0% { box-shadow: 0 0 0 0 rgba(27, 110, 194, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(27, 110, 194, 0); }
    100% { box-shadow: 0 0 0 0 rgba(27, 110, 194, 0); }
}

.card.pulse {
    animation: cardPulse 1.5s infinite;
}

/* Card with Icons */
.card-icon {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.card-icon i {
    font-size: 2rem;
    margin-right: 1rem;
    color: var(--primary-color);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .card {
        margin-bottom: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .card-header, .card-footer {
        padding: 0.75rem 1rem;
    }
}