rmcg.dev/projects/FrontendMentor/newbie/faq-accordion-card/css/style.css

/*
Info:
    desktop size 1440x768
    mobile size 375x768

*/

@import url("https://fonts.googleapis.com/css2?family=Kumbh+Sans:wght@400;700&display=swap");

:root {
    /* colors: */
    /* Text */
    --col-red-soft: hsl(14, 88%, 65%);
    --col-blue-very-dark-desaturated: hsl(238, 29%, 16%);
    --col-blue-very-dark-grayish: hsl(237, 12%, 33%);
    --col-blue-dark-grayish: hsl(240, 6%, 50%);

    /*  divider */
    --col-blue-light-grayish: hsl(240, 5%, 91%);

    /* background gradient */
    --col-violet-soft: hsl(273, 75%, 66%);
    --col-blue-soft: hsl(240, 73%, 65%);

    --clr-test: rgb(255, 111, 000);

    /* Fonts */
    --fs-header: 2rem;
    --fs-question: 0.8125rem;
    --fs-answer: 0.75rem;

    --fw-400: 400;
    --fw-700: 700;

    --lh-header: 2.5rem;
    --lh-question: 1rem;
    --lh-answer: 1.125rem;
}

*,
::after,
::before {
    box-sizing: border-box;
}

html,
body {
    min-height: 100vh;
    width: 100%;
}

img {
    width: 100%;
}

/* Base page styling */

body {
    background: linear-gradient(
        180deg,
        var(--col-violet-soft) 0%,
        var(--col-blue-soft) 100%
    );

    display: grid;
    place-items: center;
}

.card {
    display: flex;
    flex-direction: column;
    font-family: "Kumbh Sans", sans-serif;

    background-color: white;
    width: 87%;
    border-radius: 23px;
    background-image: var(--card-image);

    max-width: 400px;
}

.card__title {
    text-align: center;
    font-weight: var(--fw-700);
    font-size: var(--fs-header);
    line-height: var(--lh-header);

    margin-bottom: 2.375rem;
}

.card__header {
    margin-bottom: 40px;
    height: 90px;
}

.card__header_image {
    background: url(../images/bg-pattern-mobile.svg) center bottom no-repeat;
    background-position-x: 0px;
    background-position-y: 125px;
    background-size: 95%;
    margin: 0 auto;
    max-width: 245px;
    margin-top: -130px;
}

.desktop {
    display: none;
}

.mobile {
    display: block;
}

.woman {
    margin-left: -16px;
    padding: 30px 0px;
}

.faq {
    color: var(--col-red-soft);
    margin: 0 1.5rem 3rem;
}

/* FAQ Section */

details {
    font-size: var(--fs-answer);
    line-height: 1.125rem;
    padding: 1rem 0;
    color: var(--col-blue-dark-grayish);

    border-bottom: 1px solid var(--col-blue-light-grayish);
    border-width: 75%;
}

h1 + details {
    padding: 0 0 1rem 0;
}

summary {
    font-size: var(--fs-question);
    font-weight: var(--fw-400);
    line-height: var(--lh-question);

    color: var(--col-blue-very-dark-grayish);
    outline: none;
    text-align: left;
    cursor: pointer;
    position: relative;
    display: block;
}

summary:hover {
    color: var(--col-red-soft);
}

details > summary::after {
    position: absolute;
    content: url(../images/icon-arrow-down.svg);
    right: 0px;
}
details[open] > summary {
    font-weight: var(--fw-700);
    color: var(--col-blue-very-dark-desaturated);
}
details[open] > summary::after {
    transform: rotate(180deg);
}

details > summary::-webkit-details-marker {
    display: none;
}

details[open] summary ~ * {
    animation: sweep 0.5s ease-in-out;
}

/* ! In polypane, this only works in desktop, not mobile */
@media (prefers-reduced-motion) {
    details[open] summary ~ * {
        animation: none;
    }
}

@keyframes sweep {
    0% {
        opacity: 0;
        margin-top: -10px;
    }
    100% {
        opacity: 1;
        margin-top: 0px;
    }
}

.faq__content {
    width: 90%;
    margin-top: 0.6875rem;
}

@media screen and (min-width: 900px) {
    :root {
        --fs-question: 0.875rem;
        --lh-question: 1.0625rem;
    }

    .card {
        flex-direction: row;
        max-width: 920px;
        height: 509px;
    }

    .card__header {
        display: flex;
        align-items: center;
        height: 100%;
        justify-content: center;
    }

    .card__header_image {
        display: flex;
        align-items: center;
        background-image: url(../images/illustration-woman-online-desktop.svg),
            url(../images/bg-pattern-desktop.svg);
        background-position: -65px center, -571px -270px;
        background-size: 100%, 200%;
        height: 100%;
        min-width: 300px;
        margin: 0;
        padding: 0;
        width: 472px;
        max-width: 500px;
        position: relative;
    }

    .mobile {
        display: none;
    }

    .desktop {
        display: block;
        position: absolute;
        margin-top: 100px;
        left: -90px;
        width: 40%;
    }

    article {
        width: 45%;
    }

    .faq {
        margin-top: 65px;
    }

    .faq__content {
        width: 95%;
    }

    .card__title {
        text-align: start;
    }

    /* .box {
        width: 90px;
    } */
}