.main-error.codes{
    background-image: linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.5)), 
                      url('../../img/whitegreenartichoke-36251353.webp');
    background-attachment: fixed; 
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    min-height: 100vh;
}
.logo {
    font-size: 22px;
    letter-spacing: 1px;
    color: #FF0000;
}

    .logo strong {
        color: #FF0000;
        font-weight: 800;
    }

    .logo a:hover img {
        transform: scale(1.05);
    }

    .logo a:hover {
        opacity: 0.9;
    }

.site-logo {
    height: 45px;
    width: auto;
    transition: 0.3s ease;
}
.model-selection-wrapper {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 30px 0;
    flex-wrap: wrap;
}
.model-link {
    padding: 12px 25px;
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    color: var(--dark-navy);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-block;
}
    .model-link:hover {
        background-color: var(--dark-navy);
        color: #fff;
        border-color: var(--dark-navy);
        transform: translateY(-2px);
    }
.model-section h3 {
    background-color: var(--dark-navy);
    color: #fff;
    padding: 15px 20px;
    border-radius: 8px;
    margin: 40px 0 20px 0;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
    .model-section h3::before {
        content: "\f105"; 
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
    }
#dogalgaz, #elektrik, #kazan {
    scroll-margin-top: 100px; 
}
#dogalgaz, #elektrik, #kazan,
#model-condense, #model-ruby, #model-epsilon {
    scroll-margin-top: 110px;
}
.brand-nav {
    margin-top: 20px; 
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}
.section-title-wrapper {
    margin-top: 80px;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}
    .section-title-wrapper h2 {
        font-size: 2.2rem;
        color: var(--dark-navy);
        display: inline-block;
        padding: 10px 30px;
        background: #fff;
        position: relative;
        z-index: 2;
        text-transform: uppercase;
        letter-spacing: 1px;
    }    
    .section-title-wrapper::before {
        content: "";
        position: absolute;
        left: 0;
        top: 50%;
        width: 100%;
        height: 2px;
        background: linear-gradient(to right, transparent, var(--primary-red), transparent);
        z-index: 1;
    }
    .section-title-wrapper i {
        color: var(--primary-red);
        margin-right: 15px;
    }    
    .section-title-wrapper p {
        margin-top: 10px;
        color: #666;
        font-weight: 500;
    }
.error-hero {
    padding: 80px 0;
    background: #2c3e50;
    color: white;
    text-align: center;
    margin-bottom: 50px;
}
.error-hero .highlight { color: #e74c3c; }
.error-cards-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    padding-bottom: 60px;
}
.error-card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border: 1px solid #eee;
}
.error-code {
    display: inline-block;
    background: #e74c3c;
    color: white;
    padding: 5px 15px;
    border-radius: 5px;
    font-weight: 800;
    margin-bottom: 10px;
}
.error-title {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
}
.solution-box {
    margin-top: 15px;
    padding: 15px;
    background: #fdf2f1;
    border-left: 4px solid #e74c3c;
    font-size: 14px;
}
.cta-section {
    background: linear-gradient(135deg, #2c3e50 0%, #c0392b 100%);
    color: #fff;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    margin: 50px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
    .cta-section h2 {
        font-size: 28px;
        margin-bottom: 15px;
        font-weight: 700;
    }
    .cta-section p {
        font-size: 18px;
        margin-bottom: 25px;
        opacity: 0.9;
    }
.cta-btn {
    display: inline-block;
    background-color: #fff;
    color: #c0392b;
    padding: 15px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}
    .cta-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.3);
        background-color: #f8f9fa;
        color: #e74c3c;
    }
.kilavuz-box {
    background: #f9f9f9;
    border: 1px solid #eee;
    border-radius: 15px;
    padding: 30px;
    margin-top: 40px;
}
.kilavuz-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
    border-bottom: 2px solid #fff;
    padding-bottom: 15px;
}
.kilavuz-icon i {
    font-size: 45px;
    color: #e74c3c;
}
.kilavuz-text h4 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 5px;
}
.kilavuz-text p {
    color: #666;
    margin: 0;
    font-size: 15px;
}
.kilavuz-links {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}
.kilavuz-download-btn {
    flex: 1;
    min-width: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    background: #fff;
    border: 2px solid #2c3e50;
    color: #2c3e50;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
}
    .kilavuz-download-btn:hover {
        background: #2c3e50;
        color: #fff;
    }
    /* ============================================================
   HATA KODLARI SAYFASI MOBİL UYUMLULUK (max-width: 768px)
   ============================================================ */

    @media (max-width: 768px) {  
    .main-error-codes {
        background-attachment: scroll; /* Mobilde 'fixed' özelliği bazı cihazlarda kasma yapabilir */
        background-image: linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.5)), 
                          url('/img/whitegreenartichoke-36251353.webp');
    }      
        .error-hero {
            padding: 50px 0;
            margin-bottom: 30px;
        }
            .error-hero h1 {
                font-size: 24px;
                padding: 0 15px;
            }
        /* 2. Model ve Kategori Navigasyonu */        
        .brand-nav, .model-selection-wrapper {
            gap: 8px;
            padding: 0 10px;
        }
        .model-link {
            flex: 1 1 calc(50% - 10px); 
            padding: 10px 5px;
            font-size: 13px;
        }
        .model-section h3 {
            font-size: 1.1rem;
            padding: 12px 15px;
            margin: 30px 0 15px 0;
        } 
        .model-selection-wrapper {
        gap: 10px;
    }
        #dogalgaz, #elektrik, #kazan,
        #model-condense, #model-ruby, #model-epsilon {
            scroll-margin-top: 130px; 
        }        
        .error-cards-wrapper {
            grid-template-columns: 1fr; 
            gap: 20px;
            padding: 0 15px;
        }
        .error-card {
            padding: 20px;
        }
        .error-title {
            font-size: 16px;
        }       
        .cta-section {
            padding: 30px 15px;
            margin: 30px 15px;
            border-radius: 10px;
        }
            .cta-section h2 {
                font-size: 20px;
            }
            .cta-section p {
                font-size: 15px;
            }
        .cta-btn {
            width: 100%; 
            padding: 15px 20px;
            font-size: 16px;
        }        
        .kilavuz-box {
            margin: 30px 15px;
            padding: 20px;
        }
        .kilavuz-header {
            flex-direction: column;
            text-align: center;
            gap: 10px;
        }
        .kilavuz-icon i {
            font-size: 35px;
        }
        .kilavuz-links {
            flex-direction: column; 
            gap: 10px;
        }
        .kilavuz-download-btn {
            width: 100%;
            font-size: 14px;
            padding: 12px;
        }        
        .section-title-wrapper h2 {
            font-size: 1.4rem;
            padding: 8px 15px;
        }
      .nav-menu {
        display: none; 
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #fff;
        z-index: 1000;
    }        
        .nav-menu.active {
            display: flex;
        }
    .menu-toggle {
        display: block; 
        font-size: 24px;
        background: none;
        border: none;
        cursor: pointer;
    }
}
    /* Masaüstünde butonu gizle */
    @media (min-width: 769px) {
        .menu-toggle {
            display: none;
        }
}