:root {
    --primary-color: #253d91;
    --secondary-color: #f1f5f9; /* Açık gri arka plan */
    --dark-text: #0f172a;
    --muted-text: #64748b;
    --gradient-primary: linear-gradient(135deg, #253d91, #4f63d2);
    --gradient-secondary: linear-gradient(135deg, #f8fafc, #e2e8f0);
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --section-padding: 100px 0;
    --border-radius: 15px;
    --transition: all 0.3s ease;
}

* {
    box-sizing: border-box;
}

html, body {
    overflow-x: hidden;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--dark-text);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--dark-text);
}

/* TUTARLI SECTION TASARIMI */
section {
    padding: var(--section-padding);
    position: relative;
}

/* Çift section'lar için arka plan */
section:nth-child(even) {
    background: var(--gradient-secondary);
}

/* Section başlıkları için tutarlı stil */
section h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* SABIT BUTONLAR */
.fixed-buttons {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.fixed-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    text-decoration: none;
    box-shadow: var(--shadow-large);
    transition: var(--transition);
    animation: pulse 2s infinite;
}

.fixed-btn.whatsapp {
    background: linear-gradient(135deg, #25d366, #128c7e);
}

.fixed-btn.phone {
    background: var(--gradient-primary);
}

.fixed-btn:hover {
    transform: scale(1.1);
    color: white;
    animation: none;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

.fixed-btn.phone {
    animation-delay: 1s;
}

/* TOP BAR */
.top-bar {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 0;
    font-size: 0.85rem;
}

.top-bar-item {
    margin-left: 0;
    margin-right: 1.5rem;
    display: flex;
    align-items: center;
}

.top-bar-item:last-child {
    margin-right: 0;
}

.top-bar-item i {
    margin-right: 0.5rem;
}

/* HEADER & NAVBAR */
header.sticky-top {
    margin-bottom: 0;
    z-index: 1020;
}

.navbar {
    border-bottom: 1px solid #e2e8f0;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    margin-bottom: 0;
    padding-bottom: 0;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: var(--shadow-medium);
}

.navbar-brand img {
    height: 45px;
    width: auto;
    max-width: 180px;
    transition: var(--transition);
}

.navbar-brand span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--dark-text) !important;
    transition: var(--transition);
    position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 100%;
}

/* NAVBAR TOGGLER (HAMBURGER MENU) */
.navbar-toggler {
    padding-right: 15px;
    border: none;
    outline: none;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* HERO SECTION */
.hero {
    padding: 0 !important;
    margin-top: 0;
    overflow: hidden;
    width: 100%;
    max-width: 100%;
}

#heroCarousel {
    overflow: hidden;
    width: 100%;
    max-width: 100%;
}

#heroCarousel .carousel-item {
    height: 70vh;
    min-height: 500px;
    max-height: 700px;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
    width: 100%;
}

#heroCarousel .carousel-item::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(135deg, rgba(37, 61, 145, 0.7), rgba(79, 99, 210, 0.5));
}

#heroCarousel .carousel-caption {
    top: 50%;
    bottom: auto;
    z-index: 1;
    left: 50%;
    right: auto;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 1200px;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
}

#heroCarousel .carousel-caption h1 {
    color: #fff;
    font-weight: 700;
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

#heroCarousel .carousel-caption p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.5;
}

#heroCarousel .carousel-caption .badge {
    background: rgba(255, 255, 255, 0.15) !important;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    padding: 0.6em 1.2em;
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0 0.3rem 0.3rem 0.3rem;
    backdrop-filter: blur(10px);
    display: inline-block;
}

#heroCarousel .carousel-caption > div {
    margin-bottom: 2rem;
}

#heroCarousel .btn-hero {
    padding: 1rem 3rem;
    font-weight: 600;
    font-size: 1.1rem;
    border-radius: 50px;
    margin-top: 2rem;
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
    transition: var(--transition);
}

#heroCarousel .btn-hero:hover {
    background: #fff;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

/* MIKROFIBER INFO SECTION */
#microfiber-info {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

#microfiber-info h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: left;
}

#microfiber-info h2::after {
    display: none;
}

#microfiber-info img {
    border-radius: var(--border-radius);
    transition: var(--transition);
}

#microfiber-info img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-large);
}

/* ADVANTAGES SECTION */
#advantages {
    background: var(--gradient-secondary);
    position: relative;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.advantage-card:hover::before {
    opacity: 0.05;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-large);
    background: rgba(255, 255, 255, 0.95);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    transform: rotate(360deg) scale(1.1);
}

.advantage-card h5 {
    margin-bottom: 1rem;
    color: var(--dark-text);
    font-weight: 600;
}

.advantage-card p {
    color: var(--muted-text);
    margin-bottom: 0;
    line-height: 1.6;
}

/* USAGE AREAS SECTION */
#usage-areas {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.usage-area-item {
    text-align: center;
    padding: 1.5rem;
    transition: var(--transition);
    border-radius: var(--border-radius);
}

.usage-area-item:hover {
    transform: translateY(-5px);
}

.usage-icon-box {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.usage-icon-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    border-radius: 50%;
    transform: scale(0);
    transition: var(--transition);
    z-index: -1;
}

.usage-area-item:hover .usage-icon-box::before {
    transform: scale(1);
}

.usage-area-item:hover .usage-icon-box {
    color: white;
    border-color: transparent;
}

.usage-area-item p {
    color: var(--muted-text);
    margin-bottom: 0;
    font-weight: 500;
}

.usage-area-item:hover p {
    color: var(--dark-text);
}

/* PRODUCTS SECTION */
#products {
    background: var(--gradient-secondary);
}

.card {
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-large);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover .card-img-top {
    transform: scale(1.05);
}

.card-title {
    color: var(--dark-text);
    font-weight: 600;
}

.product-link {
    text-decoration: none;
    color: inherit;
}

.card-footer-link {
    background: var(--gradient-primary);
    color: white;
    padding: 1rem;
    text-align: center;
    font-weight: 500;
    transition: var(--transition);
}

.product-link:hover .card-footer-link {
    background: linear-gradient(135deg, #1e3a8a, #3b82f6);
}

/* ABOUT SECTION */
#about {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

#about h2 {
    text-align: left;
}

#about h2::after {
    display: none;
}

#about .badge {
    font-weight: 500;
    border-radius: 20px;
    transition: var(--transition);
}

#about .badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

#about .d-flex {
    padding: 1rem;
    border-radius: 12px;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

#about .d-flex:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.fvk-logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    transition: var(--transition);
    border: none;
    box-shadow: var(--shadow-light);
}

.fvk-logo-container:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

.fvk-logo-img {
    max-width: 100%;
    width: auto;
    height: auto;
    max-height: 200px;
    border: none !important;
    border-radius: 12px;
    transition: var(--transition);
    box-shadow: none !important;
}

.fvk-logo-img:hover {
    transform: scale(1.05);
}

/* CONTACT SECTION */
.contact-content {
    background: var(--gradient-secondary);
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    background: rgba(255, 255, 255, 0.95);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-right: 1.5rem;
    transition: var(--transition);
}

.contact-icon.whatsapp {
    background: linear-gradient(135deg, #25d366, #128c7e);
}

.contact-item:hover .contact-icon {
    transform: scale(1.1);
}

.contact-details h5 {
    margin-bottom: 0.5rem;
    color: var(--dark-text);
    font-weight: 600;
}

.contact-details p {
    margin-bottom: 0;
    color: var(--muted-text);
}

.contact-details a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.contact-details a:hover {
    color: var(--dark-text);
}

.map-container {
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius);
    padding: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.map-wrapper {
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.map-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.quick-actions .btn {
    border-radius: 50px;
    font-weight: 500;
    padding: 0.8rem 1.5rem;
    transition: var(--transition);
}

.quick-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.quick-actions .btn-success {
    background: linear-gradient(135deg, #25d366, #128c7e);
    border: none;
}

.quick-actions .btn-success:hover {
    background: linear-gradient(135deg, #1ea952, #0d5d54);
}

/* FOOTER */
footer {
    background: var(--gradient-primary);
    color: white;
    margin-top: auto;
}

.footer-brand h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #ffffff, #e3f2fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: white;
    transform: translateX(5px);
}

.footer-social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: white !important;
    text-decoration: none;
    border-radius: 50%;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    cursor: default;
}

.footer-social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white !important;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
    gap: 0.75rem;
}

.footer-contact-item i {
    width: 18px;
    font-size: 1rem;
    flex-shrink: 0;
    color: white !important;
}

.footer-contact-item a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-contact-item a:hover {
    color: white;
}

.footer-contact-item span {
    color: #cbd5e1;
    font-size: 0.95rem;
}

.footer-bottom {
    margin-top: 2rem;
}

.footer-bottom-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-bottom-links a:hover {
    color: white;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }
    
    html, body {
        overflow-x: hidden !important;
    }
    
    .container {
        max-width: 100% !important;
        padding-left: 25px;
        padding-right: 25px;
        box-sizing: border-box;
    }
    
    section h2 {
        font-size: 2rem;
        margin-bottom: 2.5rem;
    }
    
    #heroCarousel .carousel-item {
        height: 70vh;
        min-height: 450px;
        max-height: 600px;
        overflow: hidden;
        background-size: cover;
        background-position: center center;
    }
    
    #heroCarousel .carousel-caption {
        padding: 20px 15px;
        width: 95%;
        max-width: 100%;
        box-sizing: border-box;
        top: 50%;
        transform: translate(-50%, -50%);
    }
    
    #heroCarousel .carousel-caption h1 {
        font-size: 3rem;
        line-height: 1.1;
        margin-bottom: 1.5rem;
        word-wrap: break-word;
        font-weight: 700;
    }
    
    #heroCarousel .carousel-caption p {
        font-size: 1.15rem;
        margin-bottom: 2rem;
        max-width: 90%;
        margin-left: auto;
        margin-right: auto;
        line-height: 1.4;
    }
    
    #heroCarousel .carousel-caption .badge {
        display: inline-block;
        margin: 0.3rem 0.2rem;
        font-size: 0.9rem;
        padding: 0.5em 1em;
        margin-bottom: 0.5rem;
    }
    
    #heroCarousel .carousel-caption div {
        margin-bottom: 2rem;
    }
    
    #heroCarousel .btn-hero {
        padding: 0.8rem 1.6rem;
        font-size: 1rem;
        margin-top: 1.5rem;
        border-radius: 30px;
    }
    
    .advantage-card,
    .usage-area-item {
        margin-bottom: 2rem;
        margin-left: 5px;
        margin-right: 5px;
    }
    
    .advantage-icon,
    .usage-icon-box {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
        padding: 1rem;
    }
    
    .contact-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    .map-wrapper iframe {
        height: 300px;
    }
    
    .fixed-buttons {
        bottom: 15px;
        right: 15px;
    }
    
    .fixed-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .top-bar {
        display: none;
    }
    
    .navbar-toggler {
        padding-right: 20px;
        margin-right: 0;
    }
    
    .fvk-logo-container {
        padding: 1.5rem;
        margin-top: 2rem;
    }
    
    #about .col-lg-6:last-child {
        order: -1;
    }
    
    /* Mobilde tüm kartlar için ekstra padding */
    .card {
        margin: 10px 5px;
    }
    
    /* Mikrofiber info section için padding */
    #microfiber-info .col-lg-6 {
        padding-left: 25px;
        padding-right: 25px;
    }

    /* Footer Responsive */
    footer .container {
        padding-left: 25px;
        padding-right: 25px;
    }

    .footer-brand h3 {
        font-size: 1.75rem;
        text-align: center;
    }

    .footer-brand p {
        text-align: center;
        margin-bottom: 2rem;
    }

    .footer-social {
        text-align: center;
        margin-bottom: 3rem;
    }

    .footer-contact-item {
        justify-content: flex-start;
        margin-bottom: 1rem;
    }

    .footer-bottom {
        text-align: center;
    }

    .footer-bottom-links {
        margin-top: 1rem;
        text-align: center;
    }
}

@media (max-width: 576px) {
    html, body {
        overflow-x: hidden !important;
    }
    
    .container {
        padding-left: 20px;
        padding-right: 20px;
        max-width: 100% !important;
        box-sizing: border-box;
    }
    
    #heroCarousel .carousel-item {
        height: 65vh;
        min-height: 400px;
        max-height: 550px;
        overflow: hidden;
    }
    
    #heroCarousel .carousel-caption {
        padding: 15px 10px;
        top: 50%;
        left: 50%;
        right: auto;
        transform: translate(-50%, -50%);
        width: 95%;
        box-sizing: border-box;
    }
    
    #heroCarousel .carousel-caption h1 {
        font-size: 2.4rem;
        line-height: 1.1;
        margin-bottom: 1.2rem;
        text-align: center;
        font-weight: 700;
    }
    
    #heroCarousel .carousel-caption p {
        font-size: 1rem;
        margin-bottom: 1.8rem;
        text-align: center;
        line-height: 1.4;
        max-width: 85%;
        margin-left: auto;
        margin-right: auto;
    }
    
    #heroCarousel .carousel-caption .badge {
        font-size: 0.8rem;
        padding: 0.4em 0.8em;
        margin: 0.2rem 0.15rem;
        display: inline-block;
        margin-bottom: 0.4rem;
    }
    
    #heroCarousel .carousel-caption div {
        margin-bottom: 1.5rem;
    }
    
    #heroCarousel .btn-hero {
        padding: 0.65rem 1.3rem;
        font-size: 0.9rem;
        margin-top: 1.2rem;
        border-radius: 25px;
    }
    
    section h2 {
        font-size: 1.8rem;
    }
    
    .quick-actions .col-6 {
        margin-bottom: 0.5rem;
    }
    
    .navbar-toggler {
        padding-right: 25px;
        margin-right: 0;
    }
    
    /* Küçük mobilde kartlar için ekstra padding */
    .card {
        margin: 8px 5px;
    }
    
    .advantage-card,
    .usage-area-item {
        margin-left: 5px;
        margin-right: 5px;
    }
    
    /* Contact ve diğer bölümler için padding */
    .contact-item {
        padding: 1.5rem;
        margin: 10px;
    }
    
    #microfiber-info .col-lg-6 {
        padding-left: 20px;
        padding-right: 20px;
    }

    /* Footer için küçük mobil */
    .footer-brand h3 {
        font-size: 1.5rem;
    }

    .footer-social-link {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
}

/* SCROLL ANIMASYONLARI */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* GÖRSELLERİN HER ZAMAN GÖRÜNMESİNİ SAĞLA */
img {
    opacity: 1 !important;
    visibility: visible !important;
}



.card img,
.carousel-item,
.img-fluid {
    opacity: 1 !important;
}