카드 리빌 애니메이션 디자인

<div class="responsive-plan-container">
    <!-- Standard -->
    <div class="responsive-plan-card">
        <div class="responsive-plan-front">
            <h3 class="responsive-plan-title">Standard (7s)</h3>
            <p>SNS에서 빠른 주목을 이끌어내는 <br> 숏폼 광고 콘텐츠 제작</p>
        </div>
        <div class="responsive-plan-back">
            <h3 class="responsive-plan-title">Standard (7s)</h3>
            <div class="responsive-plan-price">
                <span class="responsive-plan-old-price">64만원</span> <span class="arrow">→</span>
                <span class="responsive-plan-new-price">32만원</span>
            </div>
            <ul>
                <li>제공개수: 1개</li>
                <li>러닝타임(초): 7초 이내</li>
                <li>작업일: 4일 이내</li>
                <li>수정횟수: 0회</li>
                <li>씬(클립)수: 3개 이내</li>
            </ul>
        </div>
    </div>

    <!-- Deluxe -->
    <div class="responsive-plan-card">
        <div class="responsive-plan-front">
            <h3 class="responsive-plan-title">Deluxe (15s)</h3>
            <p>브랜드 스토리를 깊이 있게 전달하는 <br> 확장형 광고 영상 제작</p>
        </div>
        <div class="responsive-plan-back">
            <h3 class="responsive-plan-title">Deluxe (15s)</h3>
            <div class="responsive-plan-price">
                <span class="responsive-plan-old-price">112만원</span> <span class="arrow">→</span>
                <span class="responsive-plan-new-price">56만원</span>
            </div>
            <ul>
                <li>제공개수: 1개</li>
                <li>러닝타임(초): 15초 이내</li>
                <li>작업일: 7일 이내</li>
                <li>수정횟수: 1회</li>
                <li>씬(클립)수: 6개 이내</li>
                <li>기본 자막, AI배경음악 포함</li>
            </ul>
        </div>
    </div>

    <!-- Premium -->
    <div class="responsive-plan-card">
        <div class="responsive-plan-front">
            <h3 class="responsive-plan-title">Premium (60s)</h3>
            <p>고해상도 업스케일링과 <br> 프리미엄 퀄리티 맞춤형 광고</p>
        </div>
        <div class="responsive-plan-back">
            <h3 class="responsive-plan-title">Premium (60s)</h3>
            <div class="responsive-plan-price">
                <span class="responsive-plan-old-price">280만원</span> <span class="arrow">→</span>
                <span class="responsive-plan-new-price">140만원</span>
            </div>
            <ul>
                <li>제공개수: 1개</li>
                <li>러닝타임(초): 60초 이내</li>
                <li>작업일: 10일 이내</li>
                <li>수정횟수: 1회</li>
                <li>씬(클립)수: 15개 이내</li>
                <li>고해상도 4K 업스케일링</li>
            </ul>
        </div>
    </div>
</div>

<style>
/* 🔹 전체 컨테이너 */
.responsive-plan-container {
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: center;
    padding: 4rem;
    background: transparent; /* 배경 투명 */
}

/* 🔹 개별 카드 */
.responsive-plan-card {
    position: relative;
    width: 340px;
    height: 480px;
    border-radius: 15px;
    overflow: hidden;
    background: white;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    cursor: pointer;
}

/* 🔹 카드 호버 시 효과 */
.responsive-plan-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

/* 🔹 카드 앞면 & 뒷면 */
.responsive-plan-front, .responsive-plan-back {
    position: absolute;
    width: 100%;
    height: 100%;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    justify-content: center;
    transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
}

/* 🔹 카드 뒷면 */
.responsive-plan-back {
    background: black;
    color: white;
    opacity: 0;
    transform: translateY(100%);
}

/* 🔹 호버 시 앞면 사라지고 뒷면 등장 */
.responsive-plan-card:hover .responsive-plan-front {
    opacity: 0;
    transform: translateY(-100%);
}

.responsive-plan-card:hover .responsive-plan-back {
    opacity: 1;
    transform: translateY(0);
}

/* 🔹 제목 (상품명) */
.responsive-plan-title {
    font-size: 2.8rem;
    font-weight: 900;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 4px solid black;
    display: inline-block;
}

/* 🔹 설명 */
.responsive-plan-front p {
    font-size: 2rem;
    color: #333;
    line-height: 1.6;
}

/* 🔹 가격 */
.responsive-plan-price {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 1rem 0;
}

.responsive-plan-old-price {
    text-decoration: line-through;
    color: #888;
    font-size: 1.9rem;
}

.responsive-plan-new-price {
    color: #D50000;
    font-size: 2.5rem;
    font-weight: bold;
}

/* 🔹 리스트 */
.responsive-plan-back ul {
    list-style: none;
    padding: 0;
    font-size: 1.8rem;
    color: white;
    margin-top: 1rem;
}

.responsive-plan-back ul li {
    margin-bottom: 0.5rem;
}

/* 🔹 반응형 조정 */
@media (max-width: 768px) {
    .responsive-plan-container {
        flex-direction: column;
        padding-top: 0 !important;
        margin-top: -1rem !important;
    }
    .responsive-plan-card {
        width: 100%;
    }
    .responsive-plan-title {
        font-size: 2.2rem;
    }
    .responsive-plan-price {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .responsive-plan-container {
        padding: 2rem 0;
        transform: scale(0.8);
    }
}
</style>