.collapse-toggle {
    width: 100%;
    text-align: left;
    background: #f8f9fa;
    border: none;
    border-radius: .375rem;
    padding: 1rem 1.25rem;
    margin-bottom: 0;
    margin-top: 10px;
    font-size: 1.15rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    transition: background 0.2s;
}
.collapse-toggle:first-of-type {
    margin-top: 0;
}
.collapse-toggle:focus {
    outline: none;
    background: #e9ecef;
}
.collapse-toggle .chevron {
    margin-left: auto;
    transition: transform 0.2s;
}
.collapse-toggle[aria-expanded="true"] .chevron {
    transform: rotate(90deg);
}
.collapse-section {
    border: 1px solid #e3e6f0;
    border-top: none;
    border-radius: 0 0 .375rem .375rem;
    margin-bottom: 1.5rem;
    padding: 1.25rem;
    background: #fff;
}

.ai-btn {
    background: linear-gradient(to right, #5f72bd, #9b23ea);
    color: white;
    border: none;
    border-radius: 1rem;
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    transition: background 0.3s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}
.ai-btn:hover {
    background: linear-gradient(to right, #9b23ea, #5f72bd);
    color: #fff;
}
.ai-note {
    font-size: 0.75rem;
    color: #6c757d;
}