.course-progress {
            height: 8px;
            border-radius: 4px;
        }
        
        .avatar-placeholder {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: linear-gradient(45deg, #1e5799, #28a745);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            margin: 0 auto 15px;
            border: 3px solid white;
        }
        
        /* Course Card Styling */
        .course-card {
            transition: all 0.4s ease;
            overflow: hidden;
            border-radius: 12px;
            margin-bottom: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .course-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .course-img {
            margin-top: 30px;
            transition: all 0.5s ease;
            height: 180px;
            object-fit: cover;
            width: 100%; /* Ensure image fills its container */
            border-radius: 12px 12px 0 0; /* Match card border radius */
        }
        
        .course-card:hover .course-img {
            transform: scale(1.05);
        }
        
        /* Content Section Styling */
        .content-section {
            display: none;
            animation: fadeIn 0.5s ease;
        }
        
        .content-section.active {
            display: block;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .section-title {
            position: relative;
            margin-bottom: 30px;
            font-weight: 700;
            color: #1e5799;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            margin-left: 60px;
            bottom: -15px;
            left: 0;
            width: 120px;
            height: 4px;
            background: linear-gradient(to right, #1e5799, #207cca);
            border-radius: 2px;
        }

        /* Profile Section */
        .profile-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 30px;
        }
        
        .profile-section {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        
        .profile-header {
            position: relative;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 2px solid #e9ecef;
        }
        
        .profile-header h2 {
            color: #1e5799;
            font-weight: 700;
            margin-bottom: 10px;
        }
        
        .profile-header p {
            color: #6c757d;
        }
        
        .profile-card {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 25px;
            border: 1px solid #e9ecef;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        
        .profile-card h5 {
            color: #1e5799;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px dashed #dee2e6;
        }
        
        .form-group label {
            font-weight: 600;
            color: #495057;
            margin-bottom: 8px;
        }
        
        .form-control {
            border: 1px solid #ced4da;
            border-radius: 8px;
            padding: 12px 15px;
            transition: all 0.3s;
            box-shadow: inset 0 1px 2px rgba(0,0,0,0.075);
        }
        
        .btn-update {
            background: linear-gradient(135deg, #1e5799, #207cca);
            color: white;
            border: none;
            border-radius: 30px;
            padding: 10px 30px;
            font-weight: 600;
            transition: all 0.3s;
            box-shadow: 0 4px 10px rgba(30, 87, 153, 0.3);
        }
        
        .btn-update:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(30, 87, 153, 0.4);
        }
        
        /* Profile Picture Styles */
        .profile-picture-container {
            text-align: center;
            padding: 20px;
        }
        
        .profile-avatar {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            border: 5px solid #e9ecef;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: linear-gradient(135deg, #1e5799, #28a745);
        }
        
        .avatar-initials {
            color: white;
            font-size: 4rem;
            font-weight: bold;
        }
        
        .avatar-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: none;
        }
        
        .file-upload {
            position: relative;
            overflow: hidden;
            display: inline-block;
            width: 100%;
            margin-top: 20px;
        }
        
        .file-upload-input {
            position: absolute;
            left: 0;
            top: 0;
            opacity: 0;
            cursor: pointer;
            width: 100%;
            height: 100%;
        }
        
        .file-upload-label {
            background: #f8f9fa;
            border: 2px dashed #ced4da;
            border-radius: 8px;
            padding: 15px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
            color: #6c757d;
            display: block;
        }
        
        .file-upload-label:hover {
            background: #e9ecef;
            border-color: #1e5799;
        }
        
        .file-upload-label i {
            display: block;
            font-size: 2rem;
            margin-bottom: 10px;
            color: #1e5799;
        }
        
        .file-name-display {
            display: block;
            margin-top: 10px;
            font-size: 0.9rem;
            color: #495057;
        }
        /* style for billing section */
        .table thead th {
            background: linear-gradient(135deg, #1e5799, #207cca);
            color: white;
            border-color: #1e5799;
            font-weight: 600;
        }

        .table-hover tbody tr:hover {
            background-color: rgba(30, 87, 153, 0.05);
            transform: scale(1.01);
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }

        .table-bordered {
            border: 1px solid #dee2e6;
            border-radius: 8px;
            overflow: hidden;
        }

        .table-bordered th, 
        .table-bordered td {
            border: 1px solid #dee2e6;
        }

        .table tbody tr {
            cursor: pointer;
        }

        .pagination .page-item.active .page-link {
            background: linear-gradient(135deg, #1e5799, #207cca);
            border-color: #1e5799;
        }