/* ====================================================== */
/* AKO DIGITAL - KUANTUM SEVİYESİ CSS (CONTAINMENT + PERFORMANCE) */
/* CSS Containment + Content-Visibility + Layer Optimization */
/* ====================================================== */

/* ==================== GENEL STİLLER VE RESETLEME ==================== */
:root { 
    --brand-blue: #0A4D68; 
    --accent-turquoise: #055a68; 
    --dark-text: #051923; 
    --white: #FFFFFF; 
    --light-gray: #F5F7FA; 
    --font-header: 'Poppins', sans-serif; 
    --font-body: 'Lato', sans-serif; 
    
    /* CSS Containment için root seviyesi */
    contain: layout style;
}

/* Universal Reset + Performance */
* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
}

html { 
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body { 
    font-family: var(--font-body); 
    color: var(--dark-text); 
    line-height: 1.6; 
    background-color: var(--white);
    overflow-x: hidden;
}

.container { 
    max-width: 1100px; 
    margin: 0 auto; 
    padding: 0 20px; 
}

h1, h2, h3, h4 { 
    font-family: var(--font-header); 
    color: var(--brand-blue); 
    line-height: 1.2; 
}

h1 { font-size: 3rem; }
h2 { font-size: 2.2rem; margin-bottom: 20px; text-align: center; }
h3 { font-size: 1.5rem; margin-bottom: 10px; }

a { 
    color: var(--accent-turquoise); 
    text-decoration: none; 
    transition: color 0.3s ease; 
}

a:hover { color: var(--brand-blue); }

ul { list-style: none; }

.section-padding { padding: 80px 0; }
.section-padding-gray { padding: 80px 0; background-color: var(--light-gray); }

/* ==================== HEADER VE NAVBAR ==================== */
.header { 
    background-color: var(--white); 
    padding: 15px 0; 
    position: sticky; 
    top: 0; 
    width: 100%; 
    z-index: 1000; 
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    
    /* PERFORMANCE: GPU acceleration */
    will-change: transform;
    contain: layout style;
}

.navbar { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.logo { 
    font-family: var(--font-header); 
    font-size: 1.8rem; 
    color: var(--brand-blue); 
    font-weight: 700; 
    text-decoration: none; 
}

.nav-menu { 
    display: flex; 
    gap: 25px; 
}

.nav-link { 
    font-weight: 700; 
    color: var(--dark-text); 
    padding-bottom: 5px; 
    border-bottom: 2px solid transparent; 
    text-decoration: none;
    transition: color 0.2s ease, border-color 0.2s ease;
    
    /* PERFORMANCE: Will-change sadece gerekli property'ler için */
    will-change: color, border-color;
}

.nav-link:hover, .nav-link.active { 
    color: var(--accent-turquoise); 
    border-bottom-color: var(--accent-turquoise); 
}

.hamburger { 
    display: none; 
    cursor: pointer; 
}

.bar { 
    display: block; 
    width: 25px; 
    height: 3px; 
    margin: 5px auto; 
    background-color: var(--brand-blue); 
    transition: all 0.3s ease-in-out; 
}

/* ==================== BUTONLAR ==================== */
.btn { 
    display: inline-block; 
    padding: 12px 28px; 
    border-radius: 5px; 
    font-weight: 700; 
    text-align: center; 
    transition: all 0.3s ease; 
    text-decoration: none; 
}

.btn-primary { 
    background-color: var(--accent-turquoise); 
    color: var(--white); 
    border: 2px solid var(--accent-turquoise); 
}

.btn-primary:hover { 
    background-color: #055a68; 
    color: var(--white); 
    transform: translateY(-2px); 
}

.btn-secondary { 
    background-color: transparent; 
    color: var(--brand-blue); 
    border: 2px solid var(--brand-blue); 
}

.btn-secondary:hover { 
    background-color: var(--brand-blue); 
    color: var(--white); 
    transform: translateY(-2px); 
}

/* ==================== HERO BÖLÜMÜ ==================== */
.hero-section { 
    position: relative; 
    padding: 120px 0; 
    text-align: center; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    min-height: 60vh; 
    background-image: url('images/hero-background.webp');
    background-size: cover; 
    background-position: center; 
    background-attachment: fixed;
    
    /* PERFORMANCE: CSS Containment */
    contain: layout paint;
}

.hero-section::before { 
    content: ''; 
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background-color: rgba(10, 77, 104, 0.75); 
    z-index: 1; 
}

.hero-content { 
    position: relative; 
    z-index: 2; 
    max-width: 800px; 
    margin: 0 auto; 
    color: #fff; 
}

.hero-content h1, .hero-content p { 
    color: var(--white); 
}

.hero-btn-secondary { 
    color: var(--white); 
    border-color: var(--white); 
}

.hero-btn-secondary:hover { 
    background-color: var(--white); 
    color: var(--brand-blue); 
}

/* ==================== GÜVENİLİRLİK BÖLÜMÜ ==================== */
.trust-grid { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 30px; 
    text-align: center; 
}

.trust-item {
    /* PERFORMANCE: Content-visibility (Chrome 85+) */
    content-visibility: auto;
    contain: layout style paint;
}

.trust-icon { 
    height: 80px; 
    width: 80px; 
    object-fit: cover; 
    border-radius: 50%; 
    margin-bottom: 15px; 
}

/* ==================== HİZMETLER ÖZETİ ==================== */
.services-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 30px; 
}

.service-card { 
    background-color: var(--white); 
    padding: 30px; 
    border-radius: 5px; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.05); 
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    
    /* CRITICAL: CSS Containment + Content-visibility */
    contain: layout style paint;
    content-visibility: auto;
}

.service-card:hover { 
    transform: translateY(-10px); 
    box-shadow: 0 8px 25px rgba(0,0,0,0.1); 
}

.card-link { 
    font-weight: 700; 
    display: inline-block; 
    margin-top: 15px; 
    text-decoration: none; 
}

/* ==================== BAŞARI HİKAYELERİ ==================== */
.success-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 30px; 
    align-items: center; 
    text-align: center; 
}

.success-story {
    /* PERFORMANCE: Containment */
    contain: layout style paint;
    content-visibility: auto;
}

.success-story h4 { 
    color: var(--dark-text); 
}

.success-result { 
    font-family: var(--font-header); 
    font-size: 2rem; 
    color: var(--accent-turquoise); 
    font-weight: 700; 
}

.client-avatar { 
    width: 120px; 
    height: 120px; 
    object-fit: cover; 
    border-radius: 50%; 
    margin: 0 auto 20px; 
    border: 3px solid var(--light-gray); 
}

/* ==================== BLOG ÖNİZLEME VE BLOG SAYFASI ==================== */
.blog-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 30px; 
}

.blog-card { 
    background-color: var(--white); 
    border-radius: 5px; 
    overflow: hidden; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.05); 
    display: flex; 
    flex-direction: column;
    
    /* CRITICAL: CSS Containment + Content-visibility */
    contain: layout style paint;
    content-visibility: auto;
}

.blog-card img { 
    width: 100%; 
    height: 200px; 
    object-fit: cover;
    
    /* PERFORMANCE: Image rendering optimization */
    image-rendering: -webkit-optimize-contrast;
}

.blog-card-content { 
    padding: 25px; 
    flex-grow: 1; 
    display: flex; 
    flex-direction: column; 
}

.blog-card-content h3 { 
    margin-bottom: 15px; 
}

.blog-card-content .card-link { 
    margin-top: auto; 
    text-decoration: none; 
}

.blog-page.blog-grid { 
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); 
}

/* ==================== CTA BÖLÜMÜ ==================== */
.cta-section { 
    background-color: var(--accent-turquoise); 
    color: var(--white); 
    padding: 60px 0; 
    text-align: center; 
}

.cta-content h2 { 
    color: var(--white); 
    margin-bottom: 15px; 
}

.cta-content p { 
    margin-bottom: 30px; 
}

.btn-cta { 
    background-color: var(--white); 
    color: var(--accent-turquoise); 
    font-size: 1.1rem; 
    padding: 15px 35px; 
}

.btn-cta:hover { 
    background-color: var(--light-gray); 
    color: var(--accent-turquoise); 
}

/* ==================== FOOTER ==================== */
.footer { 
    background-color: var(--brand-blue); 
    color: var(--white); 
    padding: 60px 0 20px; 
}

.footer-grid { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 30px; 
    margin-bottom: 40px; 
}

.footer-col h3 { 
    color: var(--white); 
    margin-bottom: 15px; 
}

.footer-col ul li { 
    margin-bottom: 10px; 
}

.footer-col a { 
    color: #a7c1cb; 
    text-decoration: none; 
}

.footer-col a:hover { 
    color: var(--white); 
}

.footer-bottom { 
    text-align: center; 
    padding-top: 20px; 
    border-top: 1px solid #1e5f78; 
    font-size: 0.9rem; 
}

/* ==================== DİĞER SAYFALAR VE BİLGİ KUTULARI ==================== */
.page-header { 
    background-color: var(--light-gray); 
    padding: 60px 0; 
    text-align: center; 
}

.content-section { 
    max-width: 1100px; 
    margin: 0 auto; 
}

.info-box {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    background-color: var(--light-gray);
    padding: 40px;
    border-radius: 10px;
    margin-bottom: 30px;
    
    /* PERFORMANCE */
    contain: layout style;
}

.info-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background-color: var(--accent-turquoise);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.info-text h2 { 
    text-align: left; 
    margin-top: 0; 
    margin-bottom: 15px; 
}

/* ==================== İLETİŞİM SAYFASI ==================== */
.contact-wrapper { 
    display: grid; 
    grid-template-columns: 2fr 1fr; 
    gap: 50px; 
}

.form-group { 
    margin-bottom: 20px; 
}

.form-group label { 
    display: block; 
    margin-bottom: 5px; 
    font-weight: 700; 
}

.form-group input, .form-group textarea { 
    width: 100%; 
    padding: 12px; 
    border: 1px solid #ccc; 
    border-radius: 5px; 
    font-family: var(--font-body); 
}

/* ==================== BLOG DETAY SAYFASI ==================== */
.post-meta { 
    font-size: 1rem; 
    color: #555; 
    margin-top: 10px; 
}

.post-container { 
    max-width: 720px; 
    margin: 0 auto; 
}

.post-featured-image { 
    width: 100%; 
    height: auto; 
    border-radius: 10px; 
    margin-bottom: 40px; 
}

.post-article h2 { 
    font-size: 1.8rem; 
    margin-top: 50px; 
    margin-bottom: 15px; 
    text-align: left; 
}

.post-article p { 
    font-size: 1.1rem; 
    line-height: 1.9; 
    margin-bottom: 25px; 
}

.post-article ul { 
    list-style-type: disc; 
    padding-left: 20px; 
    margin-bottom: 20px; 
}

/* ==================== PORTFOLYO SAYFASI ==================== */
.portfolio-grid { 
    display: grid; 
    grid-template-columns: repeat(2, 1fr); 
    gap: 30px; 
}

.portfolio-card { 
    background-color: var(--white); 
    border-radius: 10px; 
    box-shadow: 0 5px 25px rgba(0,0,0,0.07); 
    overflow: hidden; 
    transition: transform 0.3s ease;
    
    /* PERFORMANCE */
    contain: layout style paint;
    content-visibility: auto;
}

.portfolio-card:hover { 
    transform: translateY(-10px); 
}

.portfolio-card img { 
    width: 100%; 
    height: 250px; 
    object-fit: cover; 
}

.portfolio-content { 
    padding: 25px; 
}

.portfolio-tag { 
    display: inline-block; 
    background-color: var(--light-gray); 
    padding: 5px 15px; 
    border-radius: 20px; 
    font-size: 0.8rem; 
    font-weight: 700; 
    margin-bottom: 15px; 
}

/* ==================== FLOATING BUTTONS ==================== */
.floating-btn { 
    position: fixed; 
    width: 50px; 
    height: 50px; 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    color: white; 
    z-index: 1000; 
    box-shadow: 0 4px 10px rgba(0,0,0,0.2); 
    transition: transform 0.3s ease;
    
    /* PERFORMANCE */
    will-change: transform, opacity;
}

.whatsapp-btn { 
    bottom: 20px; 
    right: 20px; 
    background-color: #25D366; 
}

.scroll-top-btn { 
    bottom: 80px; 
    right: 20px; 
    background-color: var(--accent-turquoise); 
    opacity: 0; 
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.scroll-top-btn.visible { 
    opacity: 1; 
    visibility: visible; 
}

.floating-btn:hover { 
    transform: scale(1.1); 
    color: white; 
}

/* ==================== MÜŞTERİ GİRİŞİ BUTONU ==================== */
.client-login-btn { 
    background: var(--brand-blue) !important; 
    color: white !important; 
    border-radius: 25px !important;
    padding: 8px 18px !important;
    font-weight: 600 !important; 
    display: inline-flex !important; 
    align-items: center !important; 
    gap: 8px !important; 
    text-decoration: none !important; 
    font-size: 0.9rem !important;
}

/* ==================== ANIMASYON ==================== */
.fade-in { 
    opacity: 0; 
    transform: translateY(30px); 
    transition: opacity 0.6s ease-out, transform 0.6s ease-out; 
}

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

/* ==================== RESPONSIVE TASARIM ==================== */
@media (max-width: 992px) { 
    .trust-grid, .success-grid { 
        grid-template-columns: repeat(2, 1fr); 
    } 
    
    .services-grid, .blog-grid { 
        grid-template-columns: 1fr; 
    } 
    
    .footer-grid { 
        grid-template-columns: repeat(2, 1fr); 
    } 
}

@media (max-width: 768px) { 
    h1 { font-size: 2.2rem; } 
    h2 { font-size: 1.8rem; } 
    
    /* CRITICAL: MOBİLDE HERO BACKGROUND'U KALDIRMA (900KB TASARRUF) */
    .hero-section {
        background-attachment: scroll !important;
        background-image: none !important;
        background-color: var(--brand-blue) !important;
    }
    
    .hero-section::before { 
        display: none; 
    }

    .nav-menu { 
        position: fixed; 
        left: -100%; 
        top: 75px; 
        flex-direction: column; 
        background-color: var(--white); 
        width: 100%; 
        text-align: center; 
        transition: 0.3s; 
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        
        /* PERFORMANCE: GPU acceleration */
        will-change: transform;
    } 
    
    .nav-menu.active { 
        left: 0; 
    } 
    
    .nav-item { 
        padding: 15px 0; 
    } 
    
    .hamburger { 
        display: block; 
    } 
    
    .hamburger.active .bar:nth-child(2) { 
        opacity: 0; 
    } 
    
    .hamburger.active .bar:nth-child(1) { 
        transform: translateY(8px) rotate(45deg); 
    } 
    
    .hamburger.active .bar:nth-child(3) { 
        transform: translateY(-8px) rotate(-45deg); 
    } 
    
    .hero-buttons { 
        flex-direction: column; 
        gap: 10px; 
    } 
    
    .contact-wrapper { 
        grid-template-columns: 1fr; 
    } 
    
    .info-box { 
        flex-direction: column; 
        align-items: center; 
        text-align: center; 
        padding: 30px; 
    }
    
    .client-login-btn { 
        margin: 10px 0 !important; 
        justify-content: center; 
    }
}

@media (max-width: 576px) { 
    .trust-grid, .success-grid, .footer-grid { 
        grid-template-columns: 1fr; 
    } 
    
    .portfolio-grid { 
        grid-template-columns: 1fr; 
    } 
}

/* ==================== PERFORMANCE OPTIMIZATION CLASSES ==================== */
/* Bu sınıflar JavaScript tarafından kullanılabilir */
.page-loaded {
    /* Sayfa tamamen yüklendiğinde eklenecek */
}

.fonts-loaded {
    /* Fontlar yüklendiğinde eklenecek */
}

/* ==================== PRINT STYLES ==================== */
@media print {
    .header, .footer, .floating-btn, .hamburger {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* ====================================================== */
/* END OF AKO DIGITAL CSS - KUANTUM SEVİYESİ             */
/* ====================================================== */