:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --text-dark: #1f2937;
    --text-light: #4b5563;
    --bg-light: #f3f4f6;
    --bg-white: #ffffff;
    --accent: #ef4444;
    --success: #10b981;
}

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

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; transition: 0.3s; }
ul { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    white-space: nowrap;
}

.logo img {
    height: 40px; 
    width: auto;  
    object-fit: contain;
}

.logo:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

.logo span { color: var(--text-dark); }

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--text-dark);
    margin-left: 20px;
    font-weight: 500;
    white-space: nowrap;
}

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

.menu-toggle {
    display: none;
    font-size: 24px;
    background: none;
    border: none;
    color: var(--text-dark);
    cursor: pointer;
}

.btn-header {
    background: var(--primary);
    color: white !important;
    padding: 10px 20px;
    border-radius: 6px;
}
.btn-header:hover { background: var(--primary-dark); }

.hero {
    background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 40px;
}

.slider-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    background: #000;
}

.slider { display: flex; transition: transform 0.5s ease; }
.slide { min-width: 100%; }
.slide img { width: 100%; display: block; opacity: 0.9; }

.slider-caption {
    background: rgba(0,0,0,0.5);
    color: white;
    padding: 15px;
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: left;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(37, 99, 235, 0.8);
    color: white !important;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 24px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
}

.slider-btn:hover { background: var(--primary-dark); }
.prev { left: 15px; }
.next { right: 15px; }

.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 60px; padding: 0 10px; }
.section-title h2 { font-size: 2.2rem; margin-bottom: 10px; }
.section-title p { color: var(--text-light); }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.features-gridu {
    display: grid;
    gap: 30px;
}

.feature-card {
    background: var(--bg-white);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    transition: 0.3s;
}

.feature-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transform: translateY(-5px);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 { margin-bottom: 15px; font-size: 1.25rem; }
.feature-card p { color: var(--text-light); font-size: 0.95rem; }

.detail-row {
    display: flex;
    align-items: center;
    gap: 50px;
    margin-bottom: 80px;
}
.detail-row:nth-child(even) { flex-direction: row-reverse; }

.detail-content { flex: 1; }
.detail-content h2 { font-size: 2rem; margin-bottom: 15px; color: var(--text-dark); }
.detail-content p { color: var(--text-light); margin-bottom: 25px; }

.detail-image { 
    flex: 1; 
    border-radius: 10px; 
    overflow: hidden; 
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}
.detail-image img { width: 100%; display: block; }

.check-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-light);
    font-size: 1.05rem;
}
.check-list i { color: var(--success); margin-top: 5px; font-size: 1.1rem; }

.pricing-section {
    background-color: var(--bg-light);
    padding: 80px 0;
}

.pricing-container {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 15px;
    flex-wrap: wrap;
}

.price-card {
    background: var(--bg-white);
    padding: 30px 20px;
    border-radius: 8px;
    text-align: center;
    width: 200px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.price-card h3 { font-size: 1.1rem; color: var(--text-light); margin-bottom: 10px; }
.price { font-size: 2rem; font-weight: 700; color: var(--text-dark); margin-bottom: 20px; }
.price span { font-size: 1rem; font-weight: 400; }

.btn-price {
    display: block;
    width: 100%;
    padding: 10px;
    background: white;
    border: 1px solid var(--primary);
    color: var(--primary);
    border-radius: 4px;
    font-weight: 600;
    margin-top: 15px;
}
.btn-price:hover { background: var(--primary); color: white; }

.price-card.featured {
    transform: scale(1.05);
    border-top-color: var(--accent);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    z-index: 2;
}

footer {
    background: #1f2937;
    color: #9ca3af;
    padding: 60px 0 20px;
    text-align: center;
}

.footer-content { margin-bottom: 40px; }
.footer-content h3 { color: white; margin-bottom: 15px; }
.social-icons a { color: white; font-size: 1.5rem; margin: 0 10px; }

.warning-box {
    background: #fff5f5;
    border: 1px solid #feb2b2;
    color: #c53030;
    padding: 15px;
    border-radius: 6px;
    margin-top: 30px;
    font-size: 0.9rem;
    display: inline-block;
}

/* Mobil ve tablet optimizasyonları */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        padding: 15px 0;
        border-top: 1px solid #f3f4f6;
        z-index: 999;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        margin-left: 0;
        padding: 12px 25px;
        width: 100%;
        font-size: 1rem;
        border-bottom: 1px solid #f9fafb;
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .hero { 
        padding: 40px 0; 
    }
    
    .hero h1 { 
        font-size: 1.8rem; 
        padding: 0 10px; 
    }
    
    .hero p { 
        font-size: 0.95rem; 
        padding: 0 15px; 
        margin-bottom: 25px; 
    }
    
    .slider-btn { 
        width: 40px; 
        height: 40px; 
        font-size: 18px; 
    }

    .section { 
        padding: 50px 0; 
    }
    
    .section-title { 
        margin-bottom: 40px; 
    }
    
    .section-title h2 { 
        font-size: 1.8rem; 
    }

    .detail-row, .detail-row:nth-child(even) { 
        flex-direction: column; 
        gap: 25px;
        margin-bottom: 50px;
        padding: 0 10px;
    }
    
    .detail-content h2 { 
        font-size: 1.5rem; 
        text-align: center; 
    }
    
    .detail-content p { 
        text-align: center; 
        margin-bottom: 15px; 
        font-size: 0.95rem; 
    }
    
    .check-list li { 
        font-size: 0.95rem; 
        margin-bottom: 12px; 
    }

    .pricing-container { 
        flex-direction: column; 
        align-items: center; 
        gap: 20px; 
    }
    
    .price-card { 
        width: 100%; 
        max-width: 320px; 
    }
    
    .price-card.featured { 
        transform: scale(1); 
    }
    
    #contact-support .container > div,
    #advanced-features .container > div {
        flex-direction: column !important;
        gap: 35px !important;
    }

    #advanced-features div[style*="display: grid"] {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }

    #contact-support div[style*="display: flex; align-items: center"] {
        flex-direction: row !important;
        gap: 15px !important;
    }

    #contact-support a[style*="display: block"] {
        text-align: center;
    }

    .roadmap-line { 
        display: none !important; 
    }
    
    .roadmap-dot { 
        display: none !important; 
    }
    
    .roadmap-box.left, .roadmap-box.right { 
        width: 100% !important; 
        margin-left: 0 !important; 
        padding: 0 10px !important; 
    }
    
    .roadmap-box.left div, .roadmap-box.right div { 
        text-align: left !important; 
    }

    .tab-btn {
        width: 100% !important;
        text-align: center !important;
    }
}