:root {
            --bg-primary: #09121f;
            --bg-secondary: #111b27;
            --accent: #0ea5e9; /* Çatı ve su elementlerine uygun gökyüzü mavisi */
            --accent-hover: #0284c7;
            --text-main: #f3f4f6;
            --text-muted: #9ca3af;
            --border-color: #1f2d3d;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.6;
            padding: 40px 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }

        /* Ana Panel Konteyneri */
        .showcase-container {
            max-width: 1100px;
            width: 100%;
            background-color: var(--bg-secondary);
            border-radius: 20px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            border: 1px solid var(--border-color);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr;
        }

        /* Tanıtım Başlığı (Hero Üst Alanı) */
        .showcase-header {
            background: linear-gradient(135deg, rgba(9, 18, 31, 0.95), rgba(17, 27, 39, 0.85)), url('https://images.unsplash.com/photo-1621905251189-08b45d6a269e?auto=format&fit=crop&w=1200&q=80') no-repeat center center/cover;
            padding: 60px 40px;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .company-badge {
            display: inline-block;
            background-color: rgba(14, 165, 233, 0.15);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            margin-bottom: 15px;
            text-transform: uppercase;
            border: 1px solid rgba(14, 165, 233, 0.3);
        }

        .showcase-header h1 {
            font-size: 38px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .showcase-header p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* İçerik Izgarası */
        .showcase-body {
            padding: 50px 40px;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
        }

        /* Sol İçerik Sütunu */
        .main-content {
            display: flex;
            flex-direction: column;
            gap: 35px;
        }

        .section-block h2 {
            font-size: 20px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .section-block h2::after {
            content: '';
            flex-grow: 1;
            height: 1px;
            background-color: var(--border-color);
        }

        .corporate-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .corp-card {
            background-color: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 12px;
        }

        .corp-card h3 {
            font-size: 16px;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .corp-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Detaylı Hizmet Kutuları */
        .services-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .service-item-box {
            background-color: rgba(255, 255, 255, 0.01);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 12px;
            transition: all 0.3s;
        }

        .service-item-box:hover {
            border-color: var(--accent);
            background-color: rgba(14, 165, 233, 0.02);
            transform: translateX(5px);
        }

        .service-item-box h4 {
            font-size: 16px;
            color: var(--text-main);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .service-item-box h4 span {
            color: var(--accent);
        }

        .service-item-box p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Sağ İçerik Sütunu (Odaklanmış Buton Alanı) */
        .side-content {
            background-color: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 35px 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: stretch;
            gap: 25px;
        }

        .action-title {
            font-size: 20px;
            font-weight: 700;
            text-align: center;
            color: var(--text-main);
            letter-spacing: -0.3px;
        }

        .action-desc {
            font-size: 14px;
            color: var(--text-muted);
            text-align: center;
            line-height: 1.6;
        }

        /* Belirgin Odaklı Link Butonu */
        .cta-button {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background-color: var(--accent);
            color: #ffffff;
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            padding: 16px 24px;
            border-radius: 12px;
            box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            text-align: center;
        }

        .cta-button:hover {
            background-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
        }

        .cta-button svg {
            width: 18px;
            height: 18px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2.5;
            transition: transform 0.3s;
        }

        .cta-button:hover svg {
            transform: translateX(4px);
        }

        .highlight-box {
            background-color: rgba(14, 165, 233, 0.05);
            border-left: 4px solid var(--accent);
            padding: 15px;
            border-radius: 0 8px 8px 0;
            font-size: 13px;
            color: #cbd5e1;
            font-style: italic;
        }

        /* Dinamik Yazılım Bilgilendirme Barı */
        .software-signature-bar {
            background: linear-gradient(90deg, #1e293b, #0f172a);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 14px 20px;
            text-align: center;
            font-size: 13px;
            font-weight: 500;
            color: #e2e8f0;
            letter-spacing: 0.3px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .software-signature-bar .favicon-link {
            display: inline-flex;
            align-items: center;
            text-decoration: none;
        }

        .software-signature-bar .favicon-img {
            width: 16px;
            height: 16px;
            vertical-align: middle;
            transition: transform 0.2s;
        }

        .software-signature-bar .favicon-link:hover .favicon-img {
            transform: scale(1.2);
        }

        .software-signature-bar strong {
            color: #ffffff;
            font-weight: 600;
        }

        /* Web Tasarım / Reklam Ajansı Temalı Kurumsal Footer */
        .showcase-footer {
            background: linear-gradient(90deg, #1e293b, #0f172a);
            padding: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-brand h4 {
            font-size: 18px;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
        }

        .footer-services h5 {
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent);
            margin-bottom: 15px;
        }

        .footer-services ul {
            list-style: none;
        }

        .footer-services ul li {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-services ul li::before {
            content: '•';
            color: var(--accent);
        }

        /* Footer Copyright & Navigasyon Alanı */
        .footer-bottom-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-copyright {
            font-size: 12px;
            color: #4b5563;
        }

        /* Modern Alt Sayfa Ana Sayfa Butonu */
        .footer-home-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            font-size: 12px;
            font-weight: 500;
            text-decoration: none;
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.2s;
        }

        .footer-home-btn:hover {
            background-color: rgba(14, 165, 233, 0.1);
            border-color: var(--accent);
            color: var(--accent);
        }

        .footer-home-btn svg {
            width: 14px;
            height: 14px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
        }

        /* Mobil Cihaz Uyumluluk Kuralları (Responsive) */
        @media (max-width: 900px) {
            .showcase-body {
                grid-template-columns: 1fr;
                gap: 30px;
                padding: 30px 20px;
            }
            .corporate-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom-bar {
                flex-direction: column-reverse;
                text-align: center;
                gap: 15px;
            }
            .showcase-header h1 {
                font-size: 28px;
            }
            body {
                padding: 10px;
            }
        }