:root {
            --primary-color: #1a3e6f;
            --secondary-color: rgb(14, 169, 221);
            --dark-color: #333;
            --light-color: #f8f9fa;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            overflow-x: hidden;
        }

        .navbar-brand img {
            height: 50px;
        }

        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('/Resimler/slide1.jpg');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
            margin-bottom: 50px;
        }

        .section-title {
            position: relative;
            margin-bottom: 40px;
            color: var(--primary-color);
        }

        .section-title:after {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--secondary-color);
        }

        .card-door {
            border: none;
            border-radius: 0;
            overflow: hidden;
            transition: transform 0.3s;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .card-door:hover {
            transform: translateY(-10px);
        }

        .card-door img {
            height: 250px;
            object-fit: cover;
            margin: 0 auto;
        }

        .card-door .card-body {
            background-color: white;
        }

        .card-door .btn {
            background-color: var(--primary-color);
            border: none;
            border-radius: 0;
        }

        .feature-box {
            text-align: center;
            padding: 30px 20px;
            margin-bottom: 30px;
            background-color: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s;
            min-height: 200px;
        }

        .feature-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }

        .feature-box i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }

        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 50px 0 20px;
        }

        footer a {
            color: #ccc;
            text-decoration: none;
        }

        footer a:hover {
            color: var(--secondary-color);
        }

        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            text-align: center;
            line-height: 40px;
            border-radius: 50%;
            margin-right: 10px;
            transition: all 0.3s;
        }

        .social-icons a:hover {
            background-color: var(--secondary-color);
            color: var(--dark-color);
        }

        .contact-info i {
            color: var(--secondary-color);
            margin-right: 10px;
        }

        .bg-light-gray {
            background-color: #f8f9fa;
        }

        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }

        .btn-primary:hover {
            background-color: #0d2b52;
            border-color: #0d2b52;
        }

        .navbar {
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .navbar-nav .nav-link {
            color: var(--dark-color);
            font-weight: 500;
            padding: 10px 15px;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-color);
        }

        .dropdown-menu {
            border: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .dropdown-item:focus,
        .dropdown-item:hover {
            background-color: var(--primary-color);
            color: white;
        }

        .breadcrumb {
            background-color: transparent;
            padding: 0;
        }

        .breadcrumb-item a {
            color: var(--primary-color);
        }

        .door-detail-img {
            height: 400px;
            object-fit: cover;
            width: 100%;
        }

        .spec-list {
            list-style-type: none;
            padding-left: 0;
        }

        .spec-list li {
            padding: 8px 0;
            border-bottom: 1px solid #eee;
        }

        .spec-list li:last-child {
            border-bottom: none;
        }

        .spec-list i {
            color: var(--secondary-color);
            margin-right: 10px;
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }

            .navbar-brand img {
                height: 40px;
            }

            .door-detail-img {
                height: 250px;
            }
        }

 
        /*katalog*/
     /* Backdrop & Modal */
:root {
  --book-w: 800px;
  --book-h: 600px;
}     
    .catalog-backdrop {
      position: fixed; inset: 0; background: rgba(0,0,0,0.7);
      display: none; justify-content: center; align-items: center; z-index: 100000;
      padding: 24px;
    }
    .catalog-modal {
      position: relative; background:#fff; border-radius:12px; box-shadow:0 10px 30px rgba(0,0,0,.35);
      max-width: 95vw; max-height: 95vh; display:none;
      padding: 12px 12px 56px; /* altta navigasyon için boşluk */
    }
    .catalog-close {
      position:absolute; top:10px; right:12px; font-size:24px; cursor:pointer; color:#333;
      line-height:1; user-select:none;
    }

    /* Flipbook alanı */
    #flipbook {
      width: 100%;
      height: 100%;
      max-width: 100%;
      max-height: 100%;
    }

    /* Turn.js canvas tam otursun */
    #flipbook .page {
      background-size: cover !important;
      background-position: center;
    }
    /* Sayfa içerisi - resimleri buraya koyacağız */
    .page-inner {
      width:100%; height:100%; display:flex; align-items:center; justify-content:center;
      position:relative; overflow:hidden;
    }
    .page-inner img {
      width:100%; height:100%; object-fit:contain; display:block;
    }

    /* Alt navigasyon */
    .catalog-nav {
      position:absolute; left:0; right:0; bottom:8px; display:flex; gap:8px;
      justify-content:center; align-items:center;
    }
    .catalog-nav input[type="number"] {
      width: 80px; padding:6px 8px; text-align:center; border:1px solid #cfd6df; border-radius:8px;
    }
    .catalog-nav button {
      padding:6px 12px; border-radius:8px; border:0; cursor:pointer; background:#0d6efd; color:#fff;
    }
    .catalog-nav .nav-btn {
      background:#6c757d;
    }

    /* Responsive boyutlar */
    @media (max-width: 920px) {
      :root { --book-w: 90vw; --book-h: 70vh; }
    }
    
:root {
  --book-w: 800;   /* desktop için genişlik */
  --book-h: 600;   /* desktop için yükseklik */
}

@media (max-width: 768px) {
  :root {
    --book-w: 100vw;  /* mobilde tam ekran genişlik */
    --book-h: 100vh;  /* mobilde tam ekran yükseklik */
  }
    .catalog-modal {
      width: 95vw; height: 95vh;
    }
    #flipbook {
        margin-bottom:0px !important;
        margin-top:15px !important;
        margin-left:0px !important;
        margin-right:0px !important;
    }    
}