:root {
            --ink: #172439;
            --ink-soft: #4d5f72;
            --muted: #5f6c78;
            --brand: #835368;
            --brand-dark: #5e3a4c;
            --brand-soft: #f7edf2;
            --cream: #fffaf4;
            --surface: #fffdf9;
            --white: #ffffff;
            --line: rgba(131, 83, 104, 0.12);
            --shadow: 0 24px 70px rgba(23, 36, 57, 0.10);
            --shadow-soft: 0 16px 44px rgba(23, 36, 57, 0.07);
            --radius-lg: 34px;
            --radius-md: 24px;
            --font-heading: Georgia, 'Times New Roman', serif;
            --font-body: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            /* Legacy uyumluluk */
            --primary: #172439;
            --primary-dark: #0e1628;
            --secondary: #835368;
            --erguvan-pink: #835368;
            --erguvan-light-pink: #f7edf2;
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html { scroll-behavior: smooth; scroll-padding-top: 96px; }
        /* === MODERN HEADER === */
        .site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255, 253, 249, .88); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); }
        .site-header .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
        .site-header .nav { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
        .brand-lockup { display: flex; align-items: center; gap: 13px; min-width: 220px; }
        .brand-lockup img { width: 48px; height: 48px; object-fit: contain; }
        .brand-title { display: block; font-family: var(--font-heading); font-size: 27px; font-weight: 700; line-height: 1; color: var(--brand-dark); }
        .brand-sub { display: block; margin-top: 4px; font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
        .nav-links { display: flex; align-items: center; gap: 18px; color: var(--ink-soft); font-size: 13px; font-weight: 700; }
        .nav-links a { position: relative; padding: 6px 0; transition: color .25s ease; }
        .nav-links a::after { content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--brand); transition: width .3s ease; }
        .nav-links a:hover { color: var(--brand-dark); }
        .nav-links a:hover::after { width: 100%; }
        .header-cta { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; padding: 0 22px; background: var(--brand); color: #fff; font-size: 13px; font-weight: 800; letter-spacing: .04em; box-shadow: 0 14px 30px rgba(131, 83, 104, .24); transition: transform .25s ease, background .25s ease; }
        .header-cta:hover { transform: translateY(-2px); background: var(--brand-dark); }
        .nav-toggle { display: none; }
        #mobileOverlay { display: none; }
        #mobileMenu { display: none; }
        .skip-link { position: absolute; left: 16px; top: -60px; z-index: 999; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: 10px; }
        .skip-link:focus { top: 16px; }
        @media (max-width: 1100px) { .nav-links { gap: 12px; font-size: 12px; } }
        @media (max-width: 980px) {
            .nav-links { display: none; }
            .nav-toggle { display: inline-flex; flex-direction: column; justify-content: center; gap: 5px; width: 46px; height: 46px; min-height: 46px; background: transparent; border: 1px solid rgba(131, 83, 104, 0.22); border-radius: 14px; cursor: pointer; padding: 11px; z-index: 1002; }
            .nav-toggle span { display: block; width: 100%; height: 3px; border-radius: 3px; background: var(--brand-dark); transition: transform .3s ease, opacity .3s ease; }
            .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
            .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
            .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
            #mobileOverlay { position: fixed; inset: 0; background: rgba(23, 36, 57, 0.45); backdrop-filter: blur(3px); z-index: 1000; }
            #mobileOverlay.active { display: block; }
            #mobileMenu { display: block; position: fixed; top: 0; left: 0; bottom: 0; width: min(84vw, 380px); background: #fff; z-index: 1001; padding: 28px 24px 40px; transform: translateX(-105%); transition: transform .35s ease; overflow-y: auto; box-shadow: 12px 0 40px rgba(0, 0, 0, 0.18); border-radius: 0 24px 24px 0; }
            #mobileMenu.active { transform: translateX(0); }
            .mobile-menu-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
            .mobile-signature { font-family: var(--font-heading); font-size: 24px; font-weight: 700; color: var(--brand-dark); }
            .mobile-close { width: 46px; height: 46px; border: 1px solid var(--line); border-radius: 14px; background: #fff; font-size: 26px; line-height: 1; color: var(--ink); cursor: pointer; }
            #mobileMenu > a:not(.header-cta) { display: block; padding: 15px 12px; border-radius: 14px; color: var(--ink); font-weight: 800; font-size: 15px; }
            #mobileMenu > a:not(.header-cta):active { background: var(--brand-soft); }
            .mobile-cta { margin-top: 18px; min-height: 48px; display: inline-flex; align-items: center; justify-content: center; }
        }
        @media (max-width: 680px) {
            .site-header .container { width: min(100% - 32px, 1180px); }
            .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; }
            .site-header .nav { min-height: 76px; }
            .brand-title { font-size: 23px; }
            .header-cta { display: none; }
        }