/* Premium Ad Section Style - Flexbox & Slider Fix */

.premium-ad-section {
    padding: 20px;
    background: #f1f3f5;
    border-radius: 12px;
}

/* 1. 고정형 그리드 (Flexbox로 변경하여 마지막 줄 꽉 채우기) */
.premium-ad-fixed-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--banner-gap, 10px);
    margin-bottom: var(--banner-gap, 10px);
}

.premium-ad-fixed-grid .banner-unit-wrapper {
    /* 💡 [핵심] 기본 너비는 (100% / 컬럼수) - 간격 보정, 하지만 flex-grow: 1로 남는 공간 채움 */
    flex: 1 0 calc((100% - (var(--banner-gap, 10px) * (var(--fixed-columns) - 1))) / var(--fixed-columns));
    height: var(--banner-height, 80px);
    position: relative;
    overflow: hidden;
    /* 너무 작아지는 것 방지 (선택 사항) */
    min-width: 150px;
}

/* 2. 슬라이드형 래퍼 */
.premium-ad-row {
    position: relative;
    margin-bottom: 20px;
    padding: 0 50px;
}

.premium-ad-slider {
    width: 100%;
    height: var(--banner-height, 80px);
    overflow: hidden;
}

.premium-ad-slider .banner-unit-wrapper {
    height: 100%;
}

.banner-unit-wrapper img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.slider-controls .swiper-button-prev,
.slider-controls .swiper-button-next {
    color: #555 !important;
    width: 30px;
    height: 30px;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    top: 50%;
    transform: translateY(-50%);
    margin-top: 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.slider-controls .swiper-button-prev:after,
.slider-controls .swiper-button-next:after {
    font-size: 14px !important;
    font-weight: bold;
}

.slider-controls .swiper-button-prev { left: 0; }
.slider-controls .swiper-button-next { right: 0; }

.empty-banner {
    text-align: center;
    padding: 20px;
    color: #999;
}