home-assistant.io/sass/homeassistant/pages/community/components/_faq.scss

section#faq {

    .container{
        flex-direction: column;

        h2{
            margin: 0;
            margin-bottom: 30px;
            @include bp(desktop){
                margin-bottom: 60px;
            }
        }
    }

    .accordion {

        .accordion-items {
            display: flex;
            flex-direction: column;
            margin-top: 1px;
        }

        .accordion-item {
            --open: 0;
            border-bottom: 1px solid #72787E;
            display: flex;
            flex-direction: column;

            // Checkbox-driven open state
            input[type="checkbox"] {
                display: none;
            }

            input[type="checkbox"]:checked ~ .accordion-item-heading {
                // Optionally style the heading when open
            }

            input[type="checkbox"]:checked ~ .accordion-item-content-animation-wrapper {
                grid-template-rows: 1fr;
                transition: grid-template-rows 0.4s ease 0s;

                @media (prefers-reduced-motion: reduce) {
                    transition: none;
                }

                .accordion-item-content-transform-wrapper {
                    opacity: 1;
                    transform: translateY(0);
                    transition: transform 0.4s ease, visibility 0s 0.4s ease, margin-top 0.4s ease, opacity 0.3s ease 0.425s;
                    visibility: visible;

                    @media (prefers-reduced-motion: reduce) {
                        transition: none;
                    }
                }
            }

            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more {
                background-color: var(--color-primary)
            }

            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more:before,
            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more:after {
                transform: translate(-50%, -50%) scale(calc(64/28));
            }

            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more:hover:before,
            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more:hover:after {
                transform: translate(-50%, -50%) scale(calc(56/28));
            }

            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more .plus {
                transform: translate(-50%, -50%) rotate(90deg);
            }

            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more .plus:before {
                opacity: 0;
            }
            input[type="checkbox"]:checked ~ .accordion-item-heading .button-more .plus:after {
                background-color: #ffffff;
            }

            &-heading {
                cursor: pointer;
                margin-bottom: -1px;
                transition: background-color 0.3s, color 0.3s;
                user-select: none;
                isolation: isolate;
                
                label{
                    
                    display: flex;
                    justify-content: space-between;
                    padding: 20px 0;
                    z-index: 1;
                    
                    @include bp(desktop){
                        padding: 40px 0;
                    }
                }

                &-title {
                    font-weight: 400;
                    font-size: 20px;
                    color: #002332;
                    @include bp(desktop){
                        font-size: 24px;
                    }
                }

                &-icon {
                    display: grid;
                    flex-shrink: 0;
                    height: 32px;
                    place-items: center;
                    position: relative;
                    width: 32px;
                }

                .button-more {
                    background-color: #ffffff;
                    border-radius: 50%;
                    cursor: pointer;
                    height: 24px;
                    position: relative;
                    transition: background-color 0.25s ease-out, box-shadow 0.25s ease-out;
                    width: 24px;

                    .plus {
                        height: 8px;
                        left: 50%;
                        position: absolute;
                        top: 50%;
                        transform: translate(-50%, -50%) rotate(0deg);
                        transition: transform .25s ease-out;
                        width: 8px;

                        @media (prefers-reduced-motion: reduce) {
                            transition: none;
                        }
                    }

                    .plus:before,
                    .plus:after {
                        background-color: var(--color-primary);
                        content: '';
                        left: 50%;
                        position: absolute;
                        top: 50%;
                        transform: translate(-50%, -50%);
                        transition: opacity .25s ease-out, background-color .25s ease-out;

                        @media (prefers-reduced-motion: reduce) {
                            transition: none;
                        }
                    }

                    .plus:before {
                        height: 2px;
                        width: 8px;
                    }

                    .plus:after {
                        height: 8px;
                        width: 2px;
                    }

                    &:before {
                        -webkit-backdrop-filter: blur(2px);
                        backdrop-filter: blur(2px);
                        background-color: rgba(255, 255, 255, .25);
                        border-radius: 50%;
                        content: '';
                        height: 28px;
                        left: 50%;
                        position: absolute;
                        top: 50%;
                        transform: translate(-50%, -50%);
                        transition: transform .25s ease-out;
                        width: 28px;
                        z-index: -1;

                        @media (prefers-reduced-motion: reduce) {
                            transition: none;
                        }
                    }

                    &:after {
                        border-radius: 50%;
                        content: '';
                        height: 28px;
                        left: 50%;
                        position: absolute;
                        top: 50%;
                        transform: translate(-50%, -50%);
                        width: 28px;
                        z-index: 1;
                    }

                    &:hover:before,
                    &:hover:after {
                        transform: translate(-50%, -50%) scale(calc(34/28));
                    }

                    // .active state now handled by input:checked selectors above
                }
            }

            &-content {
                gap: 20px;
                grid-template-rows: 0fr;
                justify-content: center;
                padding: 0 0 20px 0;
                transition: grid-template-rows 0.3s, transform, visibility 0.3s;

                @media (prefers-reduced-motion: reduce) {
                    transition: none;
                }

                &,
                p {
                    color: #4F606E;
                    font-size: 16px;
                    line-height: 1.5;
                    margin: 0;
                }

                p:not(:last-child) {
                    margin-bottom: 1rem;
                }

                &-animation {
                    min-height: 0;
                }

                &-animation-wrapper {
                    display: grid;
                    grid-template-rows: 0fr;
                    overflow: hidden;
                    transition: grid-template-rows 0.4s ease;

                    @media (prefers-reduced-motion: reduce) {
                        transition: none;
                    }
                }

                &-transform-wrapper {
                    margin-top: 0;
                    opacity: 0.875;
                    transform: translateY(-100%);
                    transition: transform 0.4s ease, margin-top 0.4s ease, opacity 0.3s ease;

                    @media (prefers-reduced-motion: reduce) {
                        transition: none;
                    }
                }
            }
        }
    }
}