/* =========================================
   CASE STUDY STYLES (FINAL: MOBILE OPTIMIZED)
   ========================================= */

/* 1. CONTAINER CHÍNH */
.mfs-case-study-wrapper {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 80px 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    position: relative;
    overflow: hidden; 
    background-color: transparent;
}

/* 2. HEADER */
.mfs-case-study-wrapper .mfs-cs-header {
    width: 100%;
    max-width: 100%;
    /* Desktop: Giữ 9% để thẳng hàng layout web lớn */
    padding: 0 9%;   
    margin: 0 0 60px 0;
    
    display: flex;
    justify-content: space-between;
    align-items: flex-start; 
    gap: 40px;
    box-sizing: border-box;
}

/* CỘT TRÁI: TIÊU ĐỀ */
.mfs-case-study-wrapper .mfs-cs-header-left {
    width: 45%; 
}

.mfs-case-study-wrapper .mfs-cs-module-title {
    font-size: var(--cs-title-size, 56px); 
    font-weight: 800;
    line-height: 1.1;
    color: var(--cs-title-color, #111);
    margin: 0;
}

.mfs-case-study-wrapper .mfs-cs-module-title span {
    position: relative;
    display: inline-block;
    z-index: 1;
}

/* CỘT PHẢI: MÔ TẢ & NAV */
.mfs-case-study-wrapper .mfs-cs-header-right {
    width: 45%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.mfs-case-study-wrapper .mfs-cs-module-desc {
    color: var(--cs-desc-color, #666);
    font-size: var(--cs-desc-size, 18px); 
    line-height: 1.6;
    margin-bottom: 40px; 
    width: 100%;
    max-width: 600px;
    margin-top: 5px; 
}

/* 3. NÚT ĐIỀU HƯỚNG */
.mfs-case-study-wrapper .mfs-cs-nav {
    display: flex;
    gap: 15px;
    position: relative;
    z-index: 20;
}

.mfs-case-study-wrapper .mfs-cs-prev, 
.mfs-case-study-wrapper .mfs-cs-next {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 1px solid currentColor; 
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--cs-btn-bg, transparent);
    color: var(--cs-btn-color, #111);
    opacity: 0.7;
}

.mfs-case-study-wrapper .mfs-cs-prev:hover, 
.mfs-case-study-wrapper .mfs-cs-next:hover {
    background: var(--cs-btn-bg-hover, #111);
    color: var(--cs-btn-color-hover, #fff);
    border-color: var(--cs-btn-bg-hover, #111);
    opacity: 1;
    transform: translateY(-2px);
}

.mfs-case-study-wrapper .mfs-cs-prev svg,
.mfs-case-study-wrapper .mfs-cs-next svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2px;
}

/* 4. SLIDER AREA */
.mfs-case-study-wrapper .mfs-cs-slider {
    width: 100%;
    padding: 20px 0;
}

.mfs-case-study-wrapper .mfs-cs-swiper {
    width: 100%;
    overflow: visible !important; 
}

/* Slide Style Desktop */
.mfs-case-study-wrapper .swiper-slide {
    width: 55vw; 
    opacity: 0.4;
    transition: all 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    transform: scale(0.9);
    filter: blur(2px);
    height: auto;
}

.mfs-case-study-wrapper .swiper-slide-active {
    opacity: 1;
    transform: scale(1);
    z-index: 10;
    filter: blur(0);
    box-shadow: 0 20px 60px rgba(0,0,0,0.15); 
}

.mfs-case-study-wrapper .mfs-cs-card {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: 12px;
    background: #f0f0f0;
    position: relative;
}

.mfs-case-study-wrapper .mfs-cs-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.mfs-case-study-wrapper .swiper-slide-active .mfs-cs-card img {
    transform: scale(1.05);
}

/* Placeholder */
.mfs-case-study-wrapper .mfs-cs-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eee;
    color: #999;
}

/* 5. ACTIVE CONTENT (TEXT DƯỚI) */
.mfs-case-study-wrapper .mfs-cs-active-content {
    width: 100%;
    max-width: 100%;
    /* Desktop: Giữ 9% để thẳng hàng Header */
    padding: 0 9%; 
    margin: 60px 0 0 0;
    box-sizing: border-box;
    
    display: flex;
    flex-direction: column;
    align-items: center; 
    text-align: center;
    
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.mfs-case-study-wrapper .mfs-cs-active-content.show {
    opacity: 1;
    transform: translateY(0);
}

.mfs-case-study-wrapper .mfs-cs-active-title {
    font-size: var(--cs-active-title-size, 42px);
    font-weight: 800;
    color: var(--cs-active-title-color, #111);
    margin: 0 0 15px 0;
    line-height: 1.2;
    max-width: 90%;
}

.mfs-case-study-wrapper .mfs-cs-active-desc {
    font-size: var(--cs-active-desc-size, 16px);
    color: var(--cs-active-desc-color, #666);
    line-height: 1.6;
    display: block;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

/* =========================================
   RESPONSIVE
   ========================================= */

@media (max-width: 1440px) {
    .mfs-case-study-wrapper .swiper-slide { width: 60vw; }
}

@media (max-width: 1024px) {
    .mfs-case-study-wrapper .mfs-cs-header { padding: 0 5%; }
    .mfs-case-study-wrapper .mfs-cs-header-left,
    .mfs-case-study-wrapper .mfs-cs-header-right { width: 100%; margin-bottom: 20px; }
    .mfs-case-study-wrapper .mfs-cs-header { display: block; }
    .mfs-case-study-wrapper .swiper-slide { width: 75vw; }
    .mfs-case-study-wrapper .mfs-cs-active-content { padding: 0 5%; }
}

/* --- MOBILE (Max 767px) - Đã sửa lỗi --- */
@media (max-width: 767px) {
    .mfs-case-study-wrapper { padding: 30px 0; }

    /* Header Mobile: Căn lề pixel hợp lý */
    .mfs-case-study-wrapper .mfs-cs-header {
        /* [FIX] Bỏ 9%, dùng 20px để rộng rãi hơn */
        padding: 0 20px; 
        flex-direction: column;
        gap: 15px;
        margin-bottom: 25px;
        display: flex;
    }
    
    .mfs-case-study-wrapper .mfs-cs-header-left,
    .mfs-case-study-wrapper .mfs-cs-header-right {
        width: 100%;
    }

    /* [FIX] Tiêu đề Mobile: Giảm size chữ để không bị to quá */
    .mfs-case-study-wrapper .mfs-cs-module-title { 
        font-size: 28px !important; 
        line-height: 1.3;
    }
    
    .mfs-case-study-wrapper .mfs-cs-module-desc { 
        font-size: 15px !important;
        margin-bottom: 20px;
        margin-top: 0;
    }

    .mfs-case-study-wrapper .mfs-cs-nav {
        width: 100%;
        justify-content: flex-start;
        margin-top: 0;
    }
    
    /* Nút trên mobile nhỏ lại xíu cho tinh tế */
    .mfs-case-study-wrapper .mfs-cs-prev, 
    .mfs-case-study-wrapper .mfs-cs-next {
        width: 48px;
        height: 48px;
    }

    /* Slider Full */
    .mfs-case-study-wrapper .mfs-cs-slider { padding: 0; overflow: hidden; }
    
    .mfs-case-study-wrapper .swiper-slide {
        width: 100vw;
        margin-right: 0;
        opacity: 1;
        transform: scale(1);
        filter: none;
    }

    .mfs-case-study-wrapper .mfs-cs-card {
        border-radius: 0;
        aspect-ratio: 4/3;
    }

    /* [FIX] Active Content Mobile: Canh lề 20px, thẳng hàng */
    .mfs-case-study-wrapper .mfs-cs-active-content {
        margin-top: 25px;
        padding: 0 20px; /* Thẳng hàng với Header */
        align-items: flex-start; /* Canh trái */
        text-align: left;
    }
    
    .mfs-case-study-wrapper .mfs-cs-active-title {
        font-size: 24px !important; /* Title ảnh nhỏ lại */
        margin-bottom: 10px;
        max-width: 100%;
    }
    
    .mfs-case-study-wrapper .mfs-cs-active-desc {
        font-size: 14px;
        margin: 0;
        text-align: left;
    }
}