:root {
            --primary-navy: #0B1F3A;    /* Zeybek Lojistik & Group Lacivert */
            --primary-orange: #FF6F00;  /* Pargo Kargo Turuncu */
            --accent-gold: #D4AF37;     /* Kurumsal Altın Vurgu */
            --dark-bg: #070F24;
            --light-bg: #F8F9FA;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --white: #FFFFFF;
            --border-color: #E2E8F0;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Plus Jakarta Sans', sans-serif;
            scroll-behavior: smooth;
        }

        body {
            color: var(--text-dark);
            background-color: var(--white);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Top Bar */
        .topbar {
            background-color: var(--dark-bg);
            color: #94A3B8;
            font-size: 13px;
            padding: 10px 8%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .topbar-info {
            display: flex;
            gap: 25px;
        }

        .topbar-info a {
            color: #94A3B8;
            text-decoration: none;
            transition: var(--transition);
        }

        .topbar-info a:hover {
            color: var(--accent-gold);
        }

        .topbar-info i {
            color: var(--accent-gold);
            margin-right: 6px;
        }

        .topbar-right {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        /* Dil Seçici Stili */
        .lang-switch {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(212, 175, 55, 0.3);
            border-radius: 20px;
            padding: 2px;
        }

        .lang-btn {
            background: none;
            border: none;
            color: #94A3B8;
            padding: 3px 10px;
            font-size: 12px;
            font-weight: 700;
            border-radius: 16px;
            cursor: pointer;
            transition: var(--transition);
        }

        .lang-btn.active {
            background-color: var(--accent-gold);
            color: var(--primary-navy);
        }

        .lang-btn:hover:not(.active) {
            color: var(--white);
        }

        /* Header / Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 8%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            text-decoration: none;
        }

        .brand-logo img {
            height: 52px;
            width: auto;
            object-fit: contain;
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 35px;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--primary-navy);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary-orange);
        }

        .btn-contact {
            background-color: var(--primary-navy);
            color: var(--white) !important;
            padding: 10px 22px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .btn-contact:hover {
            background-color: var(--primary-orange) !important;
            transform: translateY(-2px);
        }

        /* Hero Section */
        .hero {
            position: relative;
            background: linear-gradient(135deg, rgba(7, 15, 36, 0.92) 0%, rgba(11, 31, 58, 0.85) 100%), 
                        url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
            min-height: 85vh;
            display: flex;
            align-items: center;
            color: var(--white);
            padding: 0 8%;
        }

        .hero-content {
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 175, 55, 0.15);
            border: 1px solid rgba(212, 175, 55, 0.4);
            color: var(--accent-gold);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 25px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero h1 {
            font-size: 54px;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero h1 span {
            color: var(--accent-gold);
        }

        .hero p {
            font-size: 19px;
            color: #CBD5E1;
            margin-bottom: 40px;
            font-weight: 300;
            max-width: 650px;
        }

        /* Section Stilleri */
        section {
            padding: 90px 8%;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px auto;
        }

        .section-subtitle {
            color: var(--primary-orange);
            font-weight: 700;
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 10px;
            display: block;
        }

        .section-title {
            font-size: 38px;
            color: var(--primary-navy);
            font-weight: 800;
            letter-spacing: -0.5px;
        }

        /* Hakkımızda */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 28px;
            color: var(--primary-navy);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 16px;
        }

        .about-features {
            list-style: none;
            margin-top: 25px;
        }

        .about-features li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 600;
            color: var(--primary-navy);
            margin-bottom: 12px;
        }

        .about-features i {
            color: var(--accent-gold);
            background: rgba(212, 175, 55, 0.1);
            padding: 8px;
            border-radius: 50%;
        }

        .about-image {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .about-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Sekme / Tab Stilleri */
        .tabs-nav {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .tab-btn {
            background-color: var(--white);
            color: var(--primary-navy);
            border: 2px solid var(--border-color);
            padding: 12px 28px;
            font-weight: 700;
            font-size: 15px;
            border-radius: 30px;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .tab-btn:hover {
            border-color: var(--accent-gold);
            color: var(--primary-orange);
        }

        .tab-btn.highlight-tab {
            background-color: #FFF9E6;
            border-color: var(--accent-gold);
            color: #8A6D0B;
        }

        .tab-btn.active {
            background-color: var(--primary-navy);
            color: var(--white);
            border-color: var(--primary-navy);
            box-shadow: 0 6px 15px rgba(11, 31, 58, 0.2);
        }

        .tab-btn.highlight-tab.active {
            background-color: var(--accent-gold);
            color: var(--dark-bg);
            border-color: var(--accent-gold);
        }

        .tab-content {
            display: none;
            animation: fadeIn 0.4s ease-in-out forwards;
        }

        .tab-content.active {
            display: block;
        }

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

        /* Başkanın Mesajı Kartı */
        .president-message-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-top: 5px solid var(--accent-gold);
            border-radius: 16px;
            padding: 50px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.04);
            max-width: 1000px;
            margin: 0 auto;
            position: relative;
        }

        .president-message-card h3.msg-title {
            color: var(--primary-navy);
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .president-message-card h4.msg-subtitle {
            color: var(--primary-orange);
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 15px;
        }

        .president-body p {
            color: var(--text-dark);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .president-body ul {
            list-style: none;
            margin: 25px 0;
            padding-left: 10px;
        }

        .president-body ul li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 12px;
            font-size: 15px;
            color: var(--text-dark);
        }

        .president-body ul li::before {
            content: "\f058";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--accent-gold);
        }

        .president-signature {
            margin-top: 40px;
            padding-top: 25px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
        }

        .signature-text h4 {
            font-size: 20px;
            color: var(--primary-navy);
            font-weight: 800;
        }

        .signature-text p {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
            margin-bottom: 0;
        }

        .quote-icon {
            font-size: 50px;
            color: rgba(212, 175, 55, 0.2);
        }

        /* Grup Şirketleri Section */
        .companies-section {
            background-color: var(--light-bg);
        }

        .companies-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .company-card {
            background: var(--white);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        .company-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 30px rgba(0,0,0,0.08);
            border-color: rgba(11, 31, 58, 0.2);
        }

        .card-logo-header {
            height: 140px;
            background: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .card-logo-header img {
            max-height: 85px;
            max-width: 85%;
            object-fit: contain;
        }

        .card-body {
            padding: 30px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .company-badge {
            align-self: flex-start;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 15px;
        }

        .badge-lojistik { background: rgba(11, 31, 58, 0.1); color: var(--primary-navy); }
        .badge-kargo { background: rgba(255, 111, 0, 0.1); color: var(--primary-orange); }
        .badge-otomotiv { background: rgba(212, 175, 55, 0.15); color: #B38F1D; }

        .company-card h3 {
            font-size: 22px;
            color: var(--primary-navy);
            margin-bottom: 12px;
            font-weight: 700;
        }

        .company-card p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 25px;
            line-height: 1.6;
        }

        .card-footer {
            margin-top: auto;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .btn-visit {
            text-decoration: none;
            color: var(--primary-navy);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .company-card:hover .btn-visit {
            color: var(--primary-orange);
            transform: translateX(5px);
        }

        /* Kurumsal Değerler */
        .values-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .value-box {
            padding: 30px;
            border-radius: 12px;
            background: var(--white);
            border: 1px solid var(--border-color);
            text-align: center;
            transition: var(--transition);
        }

        .value-box:hover {
            border-color: var(--accent-gold);
            background: #FFFCF5;
        }

        .value-box i {
            font-size: 32px;
            color: var(--accent-gold);
            margin-bottom: 15px;
        }

        .value-box h4 {
            font-size: 18px;
            color: var(--primary-navy);
            margin-bottom: 10px;
            font-weight: 700;
        }

        .value-box p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* İletişim CTA Banner */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-navy) 0%, var(--dark-bg) 100%);
            color: var(--white);
            text-align: center;
            border-radius: 24px;
            margin: 0 8% 80px 8%;
            padding: 60px 40px;
            position: relative;
            overflow: hidden;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 15px;
        }

        .cta-section p {
            color: #94A3B8;
            max-width: 600px;
            margin: 0 auto 30px auto;
        }

        /* Footer */
        footer {
            background-color: var(--dark-bg);
            color: #94A3B8;
            padding: 80px 8% 30px 8%;
            font-size: 14px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-about img {
            height: 55px;
            width: auto;
            margin-bottom: 20px;
            filter: brightness(0) invert(1);
        }

        .footer-about p {
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .footer-title {
            color: var(--white);
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #94A3B8;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent-gold);
            padding-left: 5px;
        }

        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }

        .footer-bottom span {
            color: var(--accent-gold);
            font-weight: 600;
        }

        /* Responsive Tasarım */
        @media (max-width: 1024px) {
            .companies-grid, .values-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 42px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .about-grid, .companies-grid, .values-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 15px;
                text-align: center;
            }
            .hero h1 {
                font-size: 32px;
            }
            .president-message-card {
                padding: 25px;
            }
        }