/* ============================================================
   아코디언
   마크업 :
     <div class="accordion">
        <div class="accordion__item">
            <button class="accordion__head" type="button">
                <span class="accordion__title">제목</span>
                <img class="accordion__arrow" src="./img/icon_arr_tri.png" alt="">
            </button>
            <div class="accordion__panel">
                <div class="accordion__body">내용</div>
            </div>
        </div>
     </div>

   .full-width :
     부모 padding / max-width 와 상관 없이 viewport 폭 차지
   ============================================================ */

.accordion {
    width: 100%;
}

.accordion__item {
    border-bottom: 1px solid var(--line2);
}

.accordion__head {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.6rem 2rem;
    background: none;
    border: 0;
    cursor: pointer;
    text-align: left;
}

.accordion__title {
    /* Heading 1 토큰 */
    font-family:    var(--font-family-base);
    font-weight:    var(--font-heading-1-weight);
    font-size:      var(--font-heading-1-size);
    line-height:    var(--font-heading-1-line);
    letter-spacing: var(--font-heading-1-spacing);
    color: var(--gray-900);
}

.accordion__arrow {
    width: 1.4rem;
    height: 1.4rem;
    transition: transform .25s ease;
    flex-shrink: 0;
    margin-left: 1rem;
}

.accordion__item.is-open .accordion__arrow {
    transform: rotate(180deg);
}

.accordion__panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
}

.accordion__body {
    padding: 1.6rem 2rem 2rem;

    /* Body 2 토큰 */
    font-family:    var(--font-family-base);
    font-weight:    var(--font-body-2-weight);
    font-size:      var(--font-body-2-size);
    line-height:    var(--font-body-2-line);
    letter-spacing: var(--font-body-2-spacing);
    color: var(--gray-600);
}

/* full-width : viewport 전체 폭으로 확장 */
.accordion.full-width {
    width: 100vw;
    position: relative;
    left: 50%;
    margin-left: -50vw;
}