.bg-gradient-primary {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
}

.rounded-lg {
    border-radius: 1rem !important;
}

.border-left-primary {
    border-left: 4px solid #007bff !important;
}

.border-left-success {
    border-left: 4px solid #28a745 !important;
}

.border-left-warning {
    border-left: 4px solid #ffc107 !important;
}

.border-left-info {
    border-left: 4px solid #17a2b8 !important;
}

.cursor-pointer {
    cursor: pointer;
}

.cursor-pointer:hover {
    background-color: #e9ecef;
}

.custom-range {
    height: 8px;
}

.custom-range::-webkit-slider-thumb {
    width: 20px;
    height: 20px;
    background: #007bff;
    border-radius: 50%;
    cursor: pointer;
    margin-top: -6px;
}

.custom-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: #007bff;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.custom-range::-webkit-slider-runnable-track {
    height: 8px;
    background: #dee2e6;
    border-radius: 4px;
}

.custom-range::-moz-range-track {
    height: 8px;
    background: #dee2e6;
    border-radius: 4px;
}

.jumbotron {
    padding: 2rem 2rem;
}

.jumbotron h1 {
    font-size: 2.5rem;
}

.card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
}

.card-header.cursor-pointer:hover {
    background-color: #e9ecef !important;
}

.accordion .card-header[aria-expanded="true"] {
    background-color: #e7f1ff !important;
}

.accordion .card-header[aria-expanded="true"] h6 i {
    transform: rotate(90deg);
    transition: transform 0.2s ease;
}

.accordion .card-header h6 i {
    transition: transform 0.2s ease;
}

.navbar-brand {
    font-size: 1.25rem;
}

.btn-group .btn {
    flex: 1;
}

footer a:hover {
    color: #adb5bd !important;
    text-decoration: none;
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.btn-success:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

.btn:focus {
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

audio {
    border-radius: 8px;
}

audio::-webkit-media-controls-panel {
    background-color: #f8f9fa;
}

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

@media (max-width: 768px) {
    .jumbotron {
        padding: 1.5rem 1rem;
    }
    
    .jumbotron h1 {
        font-size: 1.75rem;
    }
    
    .jumbotron p {
        font-size: 1rem;
    }
    
    .btn-lg {
        font-size: 1rem;
        padding: 0.75rem 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    footer .row {
        text-align: center;
    }
    
    footer .text-md-left,
    footer .text-md-right {
        text-align: center !important;
    }
}

@media (max-width: 576px) {
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        margin-bottom: 0.5rem;
        border-radius: 0.25rem !important;
    }
    
    .btn-group .btn:last-child {
        margin-bottom: 0;
    }
}