:root {
            --primary-color: #0066CC;
            --primary-gradient: linear-gradient(135deg, #0066CC 0%, #0052a3 100%);
            --accent-color: #FF6B35;
            --accent-gradient: linear-gradient(135deg, #FF6B35 0%, #e55a2b 100%);
            --secondary-color: #64748b;
            --success-color: #10b981;
            --warning-color: #f59e0b;
            --danger-color: #ef4444;
            --bg-color: #f8fafc;
            --card-bg: #ffffff;
            --text-color: #0f172a;
            --muted-color: #64748b;
            /* Erişilebilir dokunma hedefi (WCAG ~44px) */
            --tap-min: 44px;
        }
        html {
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        /* Form alanları: iOS’ta 16px altı otomatik zoom’u azaltır */
        @media (max-width: 576px) {
            input.form-control, select.form-select, textarea.form-control {
                font-size: 1rem;
            }
        }
        /* Görseller: taşmayı önle (yükseklik sabitli kart görselleri w-100 ile genişler) */
        main img {
            max-width: 100%;
            vertical-align: middle;
        }
        main .card-img-top {
            width: 100%;
            max-width: 100%;
        }
        .hero-surface h1 {
            font-size: clamp(1.35rem, 4.2vw + 0.85rem, 3rem);
            line-height: 1.2;
        }
        [data-theme="dark"] {
            --bg-color: #0b1220;
            --card-bg: #111a2e;
            --text-color: #e2e8f0;
            --muted-color: #94a3b8;
            --secondary-color: #94a3b8;
        }

        body {
            background-color: var(--bg-color);
            font-family: 'Poppins', 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: var(--text-color);
            /* Mobilde en az ~16px gövde; okunabilirlik */
            font-size: clamp(1rem, 0.92rem + 0.35vw, 1.0625rem);
            line-height: 1.55;
            padding-left: env(safe-area-inset-left, 0);
            padding-right: env(safe-area-inset-right, 0);
        }
        [data-theme="dark"] .text-muted,
        [data-theme="dark"] .text-secondary { color: var(--muted-color) !important; }
        [data-theme="dark"] .card,
        [data-theme="dark"] .dropdown-menu,
        [data-theme="dark"] .modal-content {
            background: var(--card-bg);
            color: var(--text-color);
        }
        [data-theme="dark"] .form-control,
        [data-theme="dark"] .form-select {
            background: #0f172a;
            color: var(--text-color);
            border-color: #334155;
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            letter-spacing: -0.5px;
            color: #212529 !important;
            max-width: min(100%, 70vw);
        }
        .navbar-brand:hover {
            color: #0066cc !important;
        }
        [data-theme="dark"] .navbar-brand:hover {
            color: #bfdbfe !important;
        }
        .navbar-brand-text {
            font-size: clamp(0.95rem, 2.5vw, 1.35rem);
            white-space: nowrap;
        }
        .navbar-brand img {
            max-height: 30px;
            width: auto;
            max-width: 100%;
            object-fit: contain;
        }

        .nav-link {
            color: #212529 !important;
            font-weight: 500;
            transition: all 0.3s;
        }

        .nav-link:hover {
            color: #0056b3 !important;
        }
        .navbar-nav .nav-link.active {
            color: #0066cc !important;
            background: rgba(0, 102, 204, 0.1);
            border-radius: 8px;
        }
        .navbar-nav {
            list-style: none;
            margin-bottom: 0;
            padding-left: 0;
            gap: .15rem;
            display: flex;
            flex-direction: row;
            flex-wrap: wrap;
        }
        @media (min-width: 992px) {
            .navbar-nav.me-auto {
                flex-wrap: nowrap;
            }
        }
        .navbar-nav .nav-item { list-style: none; }
        /* Keşfet yanı — öne çıkan öğretmen bölümü */
        .navbar-nav .nav-link.nav-link-ogretmenim {
            font-family: Georgia, "Times New Roman", serif;
            font-weight: 700;
            font-size: 0.98rem;
            letter-spacing: 0.03em;
            color: #fff !important;
            background: linear-gradient(120deg, #4f46e5 0%, #7c3aed 45%, #db2777 100%);
            border-radius: 999px;
            padding: 0.4rem 0.95rem !important;
            margin-left: 0.15rem;
            box-shadow: 0 2px 14px rgba(124, 58, 237, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.22);
            text-shadow: 0 1px 0 rgba(0, 0, 0, 0.12);
        }
        .navbar-nav .nav-link.nav-link-ogretmenim:hover {
            color: #fff !important;
            background: linear-gradient(120deg, #4338ca 0%, #6d28d9 42%, #be185d 100%);
            filter: brightness(1.06);
            box-shadow: 0 4px 18px rgba(124, 58, 237, 0.45);
        }
        [data-theme="dark"] .navbar-nav .nav-link.nav-link-ogretmenim {
            color: #fff !important;
            border-color: rgba(255, 255, 255, 0.28);
            box-shadow: 0 2px 16px rgba(99, 102, 241, 0.45);
        }
        [data-theme="dark"] .navbar-nav .nav-link.nav-link-ogretmenim:hover {
            color: #fff !important;
        }
        /* Navbar dışı (collapse yanı) aynı “Öğretmenim” pill — inline style kaldırıldı */
        a.btn-ogretmenim-nav {
            display: inline-flex;
            align-items: center;
            font-family: Georgia, "Times New Roman", serif;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.03em;
            color: #fff !important;
            background: linear-gradient(120deg, #4f46e5 0%, #7c3aed 45%, #db2777 100%);
            border-radius: 999px;
            padding: 0.45rem 1rem;
            border: 1px solid rgba(255, 255, 255, 0.25);
            box-shadow: 0 2px 14px rgba(124, 58, 237, 0.4);
            text-shadow: 0 1px 0 rgba(0, 0, 0, 0.12);
        }
        a.btn-ogretmenim-nav:hover {
            color: #fff !important;
            filter: brightness(1.08);
            box-shadow: 0 4px 18px rgba(124, 58, 237, 0.5) !important;
        }
        a.btn-ogretmenim-nav:focus-visible {
            outline: 2px solid #c4b5fd;
            outline-offset: 2px;
        }
        .hp-footer-contact-glass {
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-subtext {
            display: block;
            font-size: 0.72rem;
            opacity: 0.95;
            line-height: 1.15;
            font-weight: 400;
            color: #4b5563;
        }

        .card {
            border: none;
            border-radius: 16px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
            transition: transform 0.3s, box-shadow 0.3s;
            background: var(--card-bg);
        }

        @media (hover: hover) and (pointer: fine) {
            .card:hover {
                transform: translateY(-2px);
                box-shadow: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
            }
            .nav-link:hover {
                color: #0056b3 !important;
                transform: translateY(-1px);
            }
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1d4ed8 100%);
            border: none;
            border-radius: 8px;
            padding: 10px 24px;
            font-weight: 600;
            transition: all 0.3s;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
        }

        .btn-success {
            background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
            border: none;
            border-radius: 8px;
        }

        .alert {
            border: none;
            border-radius: 12px;
        }

        .form-control {
            border-radius: 8px;
            border: 2px solid #e2e8f0;
            padding: 12px;
            transition: all 0.3s;
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .badge {
            padding: 8px 12px;
            border-radius: 6px;
            font-weight: 600;
        }

        /* Smart Search Styles */
        .smart-search-results {
            animation: slideDown 0.2s ease-out;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .search-suggestion-item {
            padding: 12px 16px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: background-color 0.15s;
            border-bottom: 1px solid #f1f5f9;
        }

        .search-suggestion-item:last-child {
            border-bottom: none;
        }

        .search-suggestion-item:hover {
            background-color: #f8fafc;
        }

        .search-suggestion-item .suggestion-icon {
            font-size: 1.2rem;
            width: 32px;
            text-align: center;
        }

        .search-suggestion-item .suggestion-content {
            flex: 1;
        }

        .search-suggestion-item .suggestion-text {
            font-weight: 500;
            color: #1e293b;
        }

        .search-suggestion-item .suggestion-subtext {
            font-size: 0.85rem;
            color: #64748b;
        }

        /* Skip to Content Link - Erişilebilirlik */
        .skip-link {
            position: absolute;
            top: -40px;
            left: 0;
            background: #0066CC;
            color: white;
            padding: 8px 16px;
            z-index: 10000;
            text-decoration: none;
            font-weight: bold;
            border-radius: 0 0 4px 0;
            transition: top 0.3s;
        }

        .skip-link:focus {
            top: 0;
        }

        /* Klavye ile gezinirken tutarlı odak halkası */
        main a:focus-visible,
        main button:focus-visible,
        main .btn:focus-visible,
        main .form-control:focus-visible,
        main .form-check-input:focus-visible,
        .navbar .nav-link:focus-visible,
        .navbar .btn:focus-visible,
        .footer a:focus-visible {
            outline: 2px solid #2563eb;
            outline-offset: 2px;
        }

        .search-suggestion-item .suggestion-type {
            font-size: 0.75rem;
            padding: 4px 8px;
            background: #e2e8f0;
            border-radius: 4px;
            color: #475569;
        }

        .footer {
            background: #1e293b;
            color: #94a3b8;
            padding: 3rem 0;
            margin-top: 5rem;
        }

        .flash-messages {
            position: fixed;
            top: 80px;
            right: 20px;
            z-index: 1050;
            min-width: 300px;
            max-width: min(92vw, 420px);
        }
        .whatsapp-destek {
            position: fixed;
            bottom: max(16px, env(safe-area-inset-bottom, 0px));
            right: max(16px, env(safe-area-inset-right, 0px));
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: #25d366;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(37, 211, 102, 0.45);
            transition: transform 0.2s, box-shadow 0.2s;
            text-decoration: none;
            animation: whatsappPulse 2.6s ease-in-out infinite;
        }
        .whatsapp-destek:hover {
            color: #fff;
            transform: scale(1.08);
            box-shadow: 0 6px 16px rgba(37, 211, 102, 0.5);
        }
        .destek-panel-btn {
            position: fixed;
            bottom: max(16px, env(safe-area-inset-bottom, 0px));
            right: max(16px, env(safe-area-inset-right, 0px));
            z-index: 1045;
            min-height: 56px;
            border-radius: 999px;
            padding: 0 16px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
        }
        .whatsapp-destek svg { width: 28px; height: 28px; }
        @keyframes whatsappPulse {
            0%, 100% { transform: scale(1); box-shadow: 0 4px 12px rgba(37, 211, 102, 0.45); }
            50% { transform: scale(1.06); box-shadow: 0 6px 18px rgba(37, 211, 102, 0.60); }
        }
        .whatsapp-destek-mesai-dis { opacity: 0.9; }
        .hero-surface {
            background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%);
            border: 1px solid #dbeafe;
            border-radius: 18px;
            padding: 1.5rem;
        }
        [data-theme="dark"] .hero-surface {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            border-color: #334155;
        }
        .global-loading {
            position: fixed;
            inset: 0;
            background: rgba(255, 255, 255, 0.75);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 2000;
            backdrop-filter: blur(2px);
        }
        .global-loading.show { display: flex; }
        .footer a:hover { color: #fff !important; text-decoration: underline !important; }
        /* Dokunmatik: çift dokunma yakınlaştırmasını azaltır */
        a, button, .btn, .nav-link, .dropdown-item, label, input[type="checkbox"], input[type="radio"] {
            touch-action: manipulation;
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            .card:hover { transform: none; }
        }
        /* Tablet/telefon: dokunma dostu hedefler */
        @media (max-width: 991.98px) {
            .site-top-auth .btn {
                min-height: var(--tap-min);
                padding-left: 1rem;
                padding-right: 1rem;
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .navbar .nav-link {
                padding-top: 0.7rem;
                padding-bottom: 0.7rem;
            }
            .navbar .navbar-nav {
                flex-direction: column;
                align-items: flex-start;
                width: 100%;
            }
            .nav-subtext { display: none; }
            .navbar-toggler {
                min-width: 48px;
                min-height: 48px;
                padding: 0.5rem 0.65rem;
            }
            #theme-toggle {
                min-width: var(--tap-min);
                min-height: var(--tap-min);
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .dropdown-menu .dropdown-item {
                min-height: var(--tap-min);
                display: flex;
                align-items: center;
            }
            .navbar .dropdown-menu {
                width: 100%;
                border-radius: 10px;
            }
            main .btn:not(.btn-link):not(.stretched-link) {
                min-height: var(--tap-min);
                padding-top: 0.5rem;
                padding-bottom: 0.5rem;
            }
            main .btn-sm {
                min-height: 40px;
            }
        }
        @media (max-width: 768px) {
            .flash-messages {
                left: 12px;
                right: 12px;
                min-width: auto;
                top: 72px;
            }
            .navbar-brand-text { font-size: 0.95rem; }
            .whatsapp-destek {
                width: 50px;
                height: 50px;
                right: max(16px, env(safe-area-inset-right, 0px));
                bottom: max(16px, env(safe-area-inset-bottom, 0px));
            }
            .whatsapp-destek svg { width: 24px; height: 24px; }
            .destek-panel-btn {
                right: max(16px, env(safe-area-inset-right, 0px));
                bottom: max(16px, env(safe-area-inset-bottom, 0px));
                min-height: 50px;
                padding: 0 12px;
            }
        }