* { margin: 0; padding: 0; box-sizing: border-box; }
        
        :root {
            --header-h: 82px;
            --primary-cyan: #00D9FF;
            --primary-dark: #0A1E3D;
            --primary-blue: #1a4d7a;
            --accent-orange: #FF6B35;
            --neutral-100: #F8FAFC;
            --neutral-200: #E2E8F0;
            --neutral-700: #334155;
            --neutral-800: #1E293B;
            --gradient-primary: linear-gradient(135deg, #00D9FF 0%, #0A78BE 100%);
        }
        
        body { 
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: var(--neutral-700);
            font-size: 16px;
            background: var(--neutral-100);
        }
        
        h1, h2 { 
            font-family: 'Poppins', sans-serif;
            font-weight: 700;
            color: var(--primary-dark);
        }
        h1 { font-size: 2.5rem; line-height: 1.2; margin-bottom: 1rem; }
        h2 { font-size: 1.375rem; line-height: 1.4; }
        
        html { scroll-behavior: smooth; }
        
        /* Enhanced Header with Banner Background */
        header { 
            background: url('images/banner.webp') center center / cover no-repeat;
            background-color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            position: sticky; 
            top: 0; 
            z-index: 1000;
            backdrop-filter: blur(10px);
        }
        header::before { 
            content: ''; 
            position: absolute; 
            top: 0; left: 0; right: 0; bottom: 0; 
            background: linear-gradient(135deg, rgba(10, 30, 61, 0.7) 0%, rgba(10, 120, 190, 0.6) 100%);
            z-index: -1; 
        }
        .header-container { 
            max-width: 1200px; 
            margin: 0 auto; 
            padding: 1rem 2rem; 
            display: flex; 
            align-items: center; 
            justify-content: space-between;
        }
        .logo-container { display: flex; align-items: center; gap: 1rem; }
        .logo-container img { height: 60px; width: auto; transition: transform 0.3s; }
        .logo-container img:hover { transform: scale(1.05); }
        .company-name { color: #fff; font-size: 1.5rem; font-weight: 700; }
        
        nav { display: flex; gap: 2rem; }
        .nav-item { position: relative; }
        .nav-link { 
            color: rgba(255,255,255,0.95);
            text-decoration: none;
            background: none;
            border: none;
            cursor: pointer;
            font: inherit;
            text-align: left; 
            padding: 0.5rem 1rem; 
            display: block; 
            transition: all 0.3s; 
            font-weight: 500;
            border-radius: 6px;
        }
        .nav-link:hover { 
            color: var(--primary-cyan);
            background: rgba(255,255,255,0.1);
            transform: translateY(-2px);
        }
        .dropdown-menu { 
            position: absolute; 
            top: 100%; 
            left: 0; 
            background: white;
            min-width: 250px; 
            box-shadow: 0 10px 40px rgba(0,0,0,0.15);
            opacity: 0; 
            visibility: hidden; 
            transform: translateY(-10px); 
            transition: all 0.3s; 
            border-radius: 8px;
        }
        .nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
        .dropdown-menu a { 
            color: var(--neutral-800);
            padding: 0.75rem 1.5rem; 
            display: block; 
            text-decoration: none; 
            transition: all 0.3s;
            border-bottom: none;
        }
        .dropdown-menu a:last-child { border-bottom: none; }
        .dropdown-menu a:hover { 
            background: var(--gradient-primary);
            color: white;
            padding-left: 2rem;
        }
        .mobile-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; }
        
        .page-header { 
            background: var(--gradient-primary);
            color: #fff; 
            padding: 3rem 2rem; 
            text-align: center;
        }
        .page-header h1 { color: white; text-shadow: 0 2px 10px rgba(0,0,0,0.1); }
        .page-header p { font-size: 1.1rem; opacity: 0.95; }
        
        main { max-width: 1400px; margin: 0 auto; padding: 3rem 2rem; }
        
        .faq-container { 
            margin: 2rem auto; 
            max-width: 1350px;
            padding: 0 2rem;
        }
        .faq-item { 
            background: white;
            border-radius: 12px;
            margin-bottom: 1.5rem;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0,0,0,0.06);
            border: 1px solid var(--neutral-200);
            transition: all 0.3s;
        }
        .faq-item:hover { 
            box-shadow: 0 8px 25px rgba(0, 217, 255, 0.15);
            border-color: var(--primary-cyan);
        }
        .faq-question { 
            padding: 1.5rem 2rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: all 0.3s;
        }
        .faq-question:hover { background: var(--neutral-100); }
        .faq-question h2 { 
            margin: 0;
            font-size: 1.25rem;
            color: var(--primary-dark);
            flex: 1;
        }
        .faq-icon { 
            font-size: 1.5rem;
            color: var(--primary-cyan);
            transition: transform 0.3s;
            font-weight: bold;
        }
        .faq-item.active .faq-icon { transform: rotate(45deg); }
        .faq-answer { 
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease-out;
            padding: 0 2rem;
        }
        .faq-item.active .faq-answer { 
            max-height: 1000px;
            padding: 0 2rem 1.5rem;
        }
        .faq-answer p { 
            margin-bottom: 1rem;
            line-height: 1.8;
            font-size: 1.0625rem;
        }
        .faq-answer p:last-child { margin-bottom: 0; }
        .faq-answer em { 
            display: block;
            font-size: 0.9rem;
            color: var(--neutral-700);
            margin-top: 1rem;
            font-style: italic;
        }
        .faq-answer a { 
            color: var(--primary-cyan);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
        }
        .faq-answer a:hover { 
            color: var(--accent-orange);
            text-decoration: underline;
        }
        
        .back-to-top {
            position: fixed;
            bottom: 30px;
            left: 30px;
            width: 50px;
            height: 50px;
            background: var(--gradient-primary);
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: 0 8px 25px rgba(0, 217, 255, 0.4);
            opacity: 0;
            visibility: hidden;
            transition: all 0.4s;
            z-index: 998;
        }
        .back-to-top.visible { opacity: 1; visibility: visible; }
        .back-to-top:hover { transform: translateY(-5px) scale(1.1); }
        .back-to-top::before { content: '↑'; font-size: 1.75rem; font-weight: bold; }
        
        footer { 
            background: var(--primary-dark);
            color: #fff;
            text-align: center; 
            padding: 3rem;
            margin-top: 5rem;
        }
        footer a { color: rgba(255,255,255,0.8); text-decoration: none; margin: 0 1rem; }
        footer a:hover { color: white; }
        
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.125rem; }
            .mobile-toggle { display: block; }
            nav { 
                display: none; 
                position: absolute; 
                top: 100%; 
                left: 0; 
                right: 0; 
                background: var(--primary-dark); 
                flex-direction: column; 
                gap: 0; 
                padding: 1rem 0;
            }
            nav.active { display: flex; }
            .nav-item { width: 100%; }
            .nav-link { padding: 1rem 1.5rem; }
            .dropdown-menu { 
                position: static; 
                opacity: 1; 
                visibility: visible; 
                transform: none; 
                box-shadow: none; 
                background: rgba(255,255,255,0.05);
                display: none;
                max-height: 0;
                overflow: hidden;
            }
            .nav-item.active .dropdown-menu { display: block; max-height: 500px; }
            .dropdown-menu a { color: rgba(255,255,255,0.9); background: transparent; }
            .dropdown-menu a:hover { background: rgba(255,255,255,0.1); color: var(--primary-cyan); }
            .page-header h1 { font-size: 1.75rem; }
            .faq-question { padding: 1.25rem 1.5rem; }
            .faq-answer { padding: 0 1.5rem; }
            .faq-item.active .faq-answer { padding: 0 1.5rem 1.25rem; }
            .back-to-top { bottom: 15px; left: 15px; width: 45px; height: 45px; }
        }
        
        /* Breadcrumb Navigation */
        .breadcrumb-container { 
            background: white;
            padding: 1rem 0; 
            border-bottom: none;
            position: sticky;
            top: var(--header-h, 82px);
            z-index: 999;
        }
        .breadcrumb-wrapper { 
            max-width: 1200px; 
            margin: 0 auto; 
            padding: 0 2rem; 
        }
        .breadcrumb { 
            display: flex; 
            align-items: center; 
            list-style: none; 
            padding: 0; 
            margin: 0; 
            flex-wrap: wrap;
        }
        .breadcrumb li { 
            display: flex; 
            align-items: center; 
        }
        .breadcrumb a { 
            color: var(--primary-cyan); 
            text-decoration: none; 
            transition: all 0.3s; 
            font-weight: 500; 
            font-size: 0.95rem;
        }
        .breadcrumb a:hover { 
            color: var(--accent-orange); 
        }
        .breadcrumb span { 
            color: var(--neutral-700); 
            margin: 0 0.5rem; 
        }
        .breadcrumb strong { 
            color: var(--neutral-700); 
            font-weight: 600; 
            font-size: 0.95rem;
        }

/* Accessibility focus */
.nav-link:focus-visible{outline:2px solid var(--primary-cyan);outline-offset:2px;}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

@media (max-width: 768px){
  .nav-link:hover{transform:none;}
}
/* Back to Top - Sağ Alt Konumlandırma */
.back-to-top {
    left: auto !important;
    right: 20px !important;
    bottom: 30px !important;
    width: 48px !important;
    height: 48px !important;
    background-color: #1a365d !important; /* Kurumsal mavi */
    border: 2px solid #00d2ff !important;
    z-index: 9999 !important;
    display: flex !important;
    align-items: center;
    justify-content: center;
    border-radius: 50% !important;
    transition: all 0.3s ease;
}

.back-to-top:hover {
    background-color: #00d2ff !important;
    transform: translateY(-5px);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 25px !important;
        right: 15px !important;
    }
}