/* BioSteril LED marka görünürlüğü — logo filigran ve hover */
:root {
    --fn-bs-logo: url("/site-images/bio-steril-led-logo.jpg");
}

.fn-bs-logo-watermark {
    position: absolute;
    pointer-events: none;
    background-image: var(--fn-bs-logo);
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    opacity: 0.06;
    transition: opacity 0.4s ease, transform 0.4s ease;
    z-index: 0;
}

.fn-section-branded {
    position: relative;
    overflow: hidden;
}

.fn-section-branded:hover .fn-bs-logo-watermark {
    opacity: 0.1;
    transform: scale(1.03);
}

.fn-bs-logo-badge {
    display: inline-block;
    max-width: 200px;
    height: auto;
    transition: transform 0.25s ease, filter 0.25s ease;
}

.fn-bs-logo-badge:hover {
    transform: scale(1.04);
    filter: drop-shadow(0 8px 20px rgba(0, 98, 255, 0.2));
}

.fn-bs-logo-badge--sm {
    max-width: 140px;
}

.fn-bs-logo-badge--lg {
    max-width: 260px;
}

.fn-hero .fn-bs-logo-watermark {
    width: 420px;
    height: 420px;
    top: -40px;
    right: -60px;
}

.fn-features.fn-section-branded .fn-bs-logo-watermark {
    width: 380px;
    height: 380px;
    bottom: -80px;
    left: -40px;
}

.fn-product-focus.fn-section-branded .fn-bs-logo-watermark {
    width: 340px;
    height: 340px;
    top: 50%;
    right: -20px;
    transform: translateY(-50%);
}

.fn-product-focus.fn-section-branded:hover .fn-bs-logo-watermark {
    transform: translateY(-50%) scale(1.03);
}

.fn-faq.fn-section-branded .fn-bs-logo-watermark {
    width: 300px;
    height: 300px;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.05;
}

.fn-faq.fn-section-branded:hover .fn-bs-logo-watermark {
    opacity: 0.09;
}

.fn-cta .fn-bs-logo-watermark-cta {
    position: absolute;
    width: 200px;
    height: 200px;
    bottom: 10px;
    left: 24px;
    opacity: 0.15;
    background-image: var(--fn-bs-logo);
    background-size: contain;
    background-repeat: no-repeat;
    pointer-events: none;
    z-index: 1;
    transition: opacity 0.35s ease;
}

.fn-cta-card:hover .fn-bs-logo-watermark-cta {
    opacity: 0.22;
}

.fn-footer-bs-logo {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.fn-footer-bs-logo img {
    max-height: 48px;
    width: auto;
    opacity: 0.92;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.fn-footer-bs-logo img:hover {
    opacity: 1;
    transform: scale(1.03);
}

/* SSS / FAQ */
.fn-faq {
    padding: 100px 0;
    background: var(--fn-bg-soft, #f8faff);
}

.fn-faq-inner {
    position: relative;
    z-index: 1;
    max-width: 820px;
    margin: 0 auto;
}

.fn-faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.fn-faq-item {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.fn-faq-item:hover {
    border-color: #b8d4ff;
}

.fn-faq-item[open] {
    border-color: #0062ff;
    box-shadow: 0 12px 28px rgba(0, 98, 255, 0.08);
}

.fn-faq-question {
    list-style: none;
    cursor: pointer;
    padding: 20px 52px 20px 24px;
    font-weight: 700;
    font-size: 17px;
    color: #0f172a;
    position: relative;
    user-select: none;
}

.fn-faq-question::-webkit-details-marker {
    display: none;
}

.fn-faq-question::after {
    content: "+";
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 22px;
    font-weight: 400;
    color: #0062ff;
    line-height: 1;
}

.fn-faq-item[open] .fn-faq-question::after {
    content: "−";
}

.fn-faq-answer {
    padding: 0 24px 20px;
    color: #64748b;
    line-height: 1.7;
    font-size: 15px;
}

.fn-product-hero.fn-section-branded {
    position: relative;
    overflow: hidden;
}

.fn-product-hero .fn-bs-logo-watermark {
    width: 280px;
    height: 280px;
    top: -30px;
    right: 5%;
    opacity: 0.07;
}

/* Ürün galerisi */
.fn-product-gallery {
    padding: 80px 0;
    background: #fff;
}

.fn-gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.fn-gallery-item {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--fn-bg-soft, #f8faff);
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.fn-gallery-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 98, 255, 0.12);
}

.fn-gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.fn-gallery-item--wide {
    grid-column: span 2;
}

.fn-gallery-item--tall {
    grid-row: span 2;
    aspect-ratio: auto;
}

.fn-product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.fn-product-showcase img {
    width: 100%;
    border-radius: 16px;
    object-fit: cover;
    height: 180px;
    border: 1px solid #e2e8f0;
}

.fn-feature-card-with-img {
    overflow: hidden;
}

.fn-feature-card-with-img .fn-feature-card-img {
    height: 140px;
    overflow: hidden;
    margin: -40px -40px 20px;
}

.fn-feature-card-with-img .fn-feature-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 991px) {
    .fn-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .fn-gallery-item--wide {
        grid-column: span 2;
    }
    .fn-gallery-item--tall {
        grid-row: span 1;
    }
    .fn-product-showcase {
        grid-template-columns: 1fr;
    }
    .fn-hero .fn-bs-logo-watermark {
        width: 260px;
        height: 260px;
        right: -40px;
        top: auto;
        bottom: 0;
    }
}

@media (max-width: 767px) {
    .fn-gallery-grid {
        grid-template-columns: 1fr;
    }
    .fn-gallery-item--wide {
        grid-column: span 1;
    }
}