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

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8edf2 100%);
    z-index: 0;
}

.animate-fade-in {
    animation: fadeIn 0.8s ease-out;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

#drop-zone.dragover {
    border-color: #3b82f6;
    background: rgba(59, 130, 246, 0.05);
    transform: scale(1.02);
}

.issue-card {
    transition: all 0.3s ease;
}

.issue-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.severity-high {
    border-left: 4px solid #dc2626;
}

.severity-medium {
    border-left: 4px solid #f59e0b;
}

.severity-low {
    border-left: 4px solid #3b82f6;
}

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

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

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

.border-3 {
    border-width: 3px;
}

.sample-card {
    transition: all 0.2s ease;
    cursor: pointer;
}

.sample-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -4px rgba(0, 0, 0, 0.12);
}

.sample-card.selected {
    border-color: #3b82f6;
    background-color: #eff6ff;
}