* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Poppins', sans-serif;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
            color: #1e293b;
        }

        /* Ana Yerleşim */
        .main-container {
            width: 100%;
            max-width: 1500px;
            margin: 36px auto 60px auto;
            padding: 0 20px;
            display: flex;
            gap: 32px;
            align-items: flex-start;
            flex-grow: 1;
        }

        /* Sol Alan: Ana İçerik Kartı */
        .content-left {
            flex: 2.2;
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 20px;
            padding: 32px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            animation: fadeInUp 0.5s ease-out;
        }

        /* Sayfa Rozeti */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #e0e7ff;
            color: #1e3a8a;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            border: 1px solid #c7d2fe;
        }

        .content-left h1 {
            color: #0f172a;
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        /* Önizleme Görseli */
        .featured-image-wrapper {
            position: relative;
            border-radius: 14px;
            overflow: hidden;
            border: 1px solid #e2e8f0;
            margin-bottom: 24px;
            background: #f8fafc;
        }

        .featured-image-wrapper img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.4s ease;
        }

        .featured-image-wrapper:hover img {
            transform: scale(1.015);
        }

        /* İndirme Butonu */

/* Buton Grubu Kapsayıcısı */
.download-buttons-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 26px;
}
        .download-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 24px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: #ffffff;
    text-decoration: none;
    border-radius: 12px;
    font-size: 16.5px;
    font-weight: 600;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

        .download-button:hover {
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
    color: #ffffff;
}

/* Kapak İndirme Butonu (Zümrüt Yeşili) */
.download-button.btn-cover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    box-shadow: 0 4px 14px rgba(5, 150, 105, 0.25);
}

.download-button.btn-cover:hover {
    background: linear-gradient(135deg, #047857 0%, #065f46 100%);
    box-shadow: 0 8px 20px rgba(5, 150, 105, 0.35);
    color: #ffffff;
}

.download-button i {
    font-size: 19px;
    transition: transform 0.3s ease;
}

.download-button:hover i {
    transform: translateY(2px);
}

        /* Özellik Vurgu Kutusu */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin: 20px 0;
            padding: 18px;
            background: #f8fafc;
            border-radius: 12px;
            border: 1px dashed #cbd5e1;
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 500;
            color: #334155;
        }

        .feature-item i {
            color: #2563eb;
        }

        /* Sağ Alan: Yan Menü */
        .content-right {
            flex: 1.1;
            position: sticky;
            top: 24px;
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 20px;
            padding: 24px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            animation: fadeInUp 0.6s ease-out;
        }

        .sidebar-header {
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 16px;
            margin-bottom: 16px;
            border-bottom: 1px solid #f1f5f9;
        }

        .sidebar-header i {
            color: #2563eb;
            font-size: 18px;
        }

        .sidebar-header h2 {
            font-size: 18px;
            font-weight: 700;
            color: #0f172a;
        }

        .other-plans-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        /* Yan Menü Kartı */
        .other-plan-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 14px;
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            text-decoration: none;
            transition: all 0.25s ease;
        }

        .other-plan-link .item-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .other-plan-link .item-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: #eff6ff;
            color: #2563eb;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            transition: all 0.25s ease;
        }

        .other-plan-link .item-text h3 {
            font-size: 14.5px;
            font-weight: 600;
            color: #1e293b;
            transition: color 0.25s ease;
        }

        .other-plan-link .item-text span {
            font-size: 12px;
            color: #64748b;
            display: block;
        }

        .other-plan-link .item-arrow {
            color: #94a3b8;
            font-size: 12px;
            transition: all 0.25s ease;
        }

        /* Yan Menü Hover */
        .other-plan-link:hover {
            background: #ffffff;
            border-color: #93c5fd;
            transform: translateX(4px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
        }

        .other-plan-link:hover .item-icon {
            background: #2563eb;
            color: #ffffff;
            transform: scale(1.05);
        }

        .other-plan-link:hover .item-text h3 {
            color: #2563eb;
        }

        .other-plan-link:hover .item-arrow {
            color: #2563eb;
            transform: translateX(3px);
        }

        /* Animasyon */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(16px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Mobil Uyumluluk */
        @media (max-width: 992px) {
            .main-container {
                flex-direction: column;
                margin: 20px auto 40px auto;
                gap: 24px;
            }

            .content-left, .content-right {
                width: 100%;
                padding: 20px;
            }

            .content-right {
                position: static;
            }

            .content-left h1 {
                font-size: 22px;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
        }