.callout {
            border-left: 5px solid;
            border-radius: 12px;
            padding: 20px 24px;
            margin: 20px 0;
            background: #f8f9fa;
            box-shadow: 0 5px 20px rgba(0,0,0,.06);
            transition: all .3s ease;
        }

        .callout:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0,0,0,.10);
        }

        .callout-primary {
            border-color: #0d6efd;
            background: #eef5ff;
        }

        .callout-success {
            border-color: #198754;
            background: #effaf4;
        }

        .callout-warning {
            border-color: #ffc107;
            background: #fff9e6;
        }

        .callout-danger {
            border-color: #dc3545;
            background: #fff1f2;
        }

        .callout-icon {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .icon-primary {
            background: #dbeafe;
            color: #0d6efd;
        }

        .icon-success {
            background: #d1fae5;
            color: #198754;
        }

        .icon-warning {
            background: #fff3cd;
            color: #997404;
        }

        .icon-danger {
            background: #f8d7da;
            color: #dc3545;
        }