/* 02-base: sayfa zemini, container, header, footer */
        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Outfit', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background:
                radial-gradient(circle at 15% 0%, rgba(6, 182, 212, 0.10) 0%, transparent 45%),
                radial-gradient(circle at 85% 100%, rgba(14, 116, 144, 0.10) 0%, transparent 45%),
                linear-gradient(160deg, #eef4f8 0%, #f1f5f9 55%, #eaf7f9 100%);
            background-attachment: fixed;
            color: var(--text-dark);
            min-height: 100vh;
            padding: 24px 20px;
            line-height: 1.5;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: var(--secondary-color);
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 50px -12px rgba(15, 23, 42, 0.18), 0 0 0 1px rgba(226, 232, 240, 0.8);
            overflow: hidden;
        }

        /* Header */
        .header {
            position: relative;
            background: linear-gradient(120deg, var(--primary-dark) 0%, var(--primary-color) 55%, #22d3ee 100%);
            color: white;
            padding: 46px 20px 40px;
            text-align: center;
            overflow: hidden;
        }

        .header::before,
        .header::after {
            content: '';
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.10);
            pointer-events: none;
        }

        .header::before {
            width: 280px;
            height: 280px;
            top: -160px;
            left: -80px;
        }

        .header::after {
            width: 220px;
            height: 220px;
            bottom: -140px;
            right: -60px;
            background: rgba(255, 255, 255, 0.08);
        }

        .header h1 {
            position: relative;
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.3px;
            margin-bottom: 8px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }

        .header p {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            opacity: 0.92;
            letter-spacing: 0.3px;
        }

        /* Footer */
        .site-footer {
            text-align: center;
            max-width: 1200px;
            margin: 18px auto 0;
            padding: 4px 20px 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-light);
        }

        /* Dil seçici (sol üst, bayraklı) */
        .lang-switch {
            position: absolute;
            top: 18px;
            left: 20px;
            display: inline-flex;
            align-items: center;
            gap: 2px;
            padding: 4px;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.12);
            border-radius: 999px;
            z-index: 2;
        }

        .lang-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 10px 4px 4px;
            border: none;
            background: transparent;
            color: rgba(255, 255, 255, 0.8);
            border-radius: 999px;
            font-family: inherit;
            font-size: 12px;
            font-weight: 800;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .lang-btn img {
            width: 24px;
            height: 17px;
            object-fit: cover;
            border-radius: 3px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
            display: block;
        }

        .lang-btn:hover {
            color: white;
            background: rgba(255, 255, 255, 0.15);
        }

        .lang-btn.active {
            background: white;
            color: var(--primary-dark);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
        }

        /* Sosyal bağlantılar (motto altı) */
        .social-links {
            position: relative;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 18px;
        }

        .social-links a {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 16px;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.12);
            color: white;
            border-radius: 999px;
            font-size: 12.5px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .social-links a:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }

        .social-icon {
            font-size: 15px;
            line-height: 1;
            width: 18px;
            text-align: center;
        }