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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* Header ve Navigasyon */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo h1 {
    color: #ff0000;
    font-size: 1.8rem;
    letter-spacing: 2px;
}

.logo span {
    color: #ccc;
    font-size: 0.8rem;
    display: block;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #ff0000;
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://via.placeholder.com/1920x1080') center/cover;
    opacity: 0.3;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    color: white;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.highlight {
    color: #ff0000;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s both;
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s both;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary {
    background: #ff0000;
    color: white;
    border: 2px solid #ff0000;
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-primary:hover, .btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Section Titles */
.product h2, .features h2, .technical h2, .contact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.technical h2 {
    color: white;
}

/* Product Section */
.product {
    padding: 5rem 5%;
    background: #f8f9fa;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    align-items: center;
}

.device-preview {
    background: #1a1a1a;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.led-panel {
    background: #2d2d2d;
    color: #ff0000;
    padding: 1rem;
    border-radius: 10px;
    font-family: monospace;
    font-size: 1.2rem;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.lcd {
    background: #0a0a0a;
    color: #00ff41;
    padding: 0.5rem;
    border-radius: 5px;
    font-family: monospace;
    font-size: 0.9rem;
}

.product-info ul {
    list-style: none;
    padding: 0;
}

.product-info li {
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

/* Features Section - ÖZELLİKLER */
.features {
    padding: 5rem 5%;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 15px;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #ff0000;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: #666;
    font-size: 0.95rem;
}

/* Technical Section - TEKNİK DETAYLAR */
.technical {
    padding: 5rem 5%;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: white;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tech-card {
    background: rgba(255,255,255,0.1);
    padding: 1.5rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s, background 0.3s;
}

.tech-card:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.15);
}

.tech-card h3 {
    color: #ff0000;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.tech-card ul {
    list-style: none;
    padding: 0;
}

.tech-card li {
    padding: 0.3rem 0;
    font-size: 0.9rem;
    color: #ddd;
}

/* Contact Section */
.contact {
    padding: 5rem 5%;
    background: #f8f9fa;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.contact-info {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.contact-info h3 {
    color: #ff0000;
    margin-bottom: 1rem;
}

.contact-info a {
    color: #ff0000;
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: #ff0000;
}

.contact-form button {
    width: 100%;
    padding: 1rem;
    background: #ff0000;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
}

.contact-form button:hover {
    background: #cc0000;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 0.8rem;
    border-radius: 8px;
    margin-top: 1rem;
    text-align: center;
}

/* Footer */
footer {
    background: #1a1a1a;
    color: #ccc;
    padding: 3rem 5% 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo h3 {
    color: #ff0000;
    margin-bottom: 0.5rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #ff0000;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    color: #ccc;
    text-decoration: none;
    font-size: 1.5rem;
    transition: color 0.3s;
}

.social-icons a:hover {
    color: #ff0000;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid #333;
}

/* Burger Menu (Mobile) */
.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 5px;
    transition: all 0.3s ease;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .burger {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        right: -100%;
        top: 70px;
        height: calc(100vh - 70px);
        background: rgba(0, 0, 0, 0.95);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 100%;
        transition: right 0.5s;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .product-grid, .features-grid, .tech-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}

/* Tablet Responsive */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .product-grid, .features-grid, .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Products Grid - İki Ürünlü Kart Yapısı */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.product-badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background: #ff0000;
    color: white;
    padding: 0.3rem 2rem;
    font-size: 0.8rem;
    font-weight: bold;
    transform: rotate(45deg);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.product-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.product-card h3 {
    color: #ff0000;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.product-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.product-specs {
    text-align: left;
    margin: 1.5rem 0;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.product-specs span {
    display: block;
    padding: 0.3rem 0;
    font-size: 0.9rem;
    color: #333;
}

.btn-detail {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: #ff0000;
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn-detail:hover {
    background: #cc0000;
}

/* Teknik kartlar için iyileştirme */
.tech-card ul li strong {
    color: #ff0000;
}

/* Responsive */
@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-badge {
        right: -35px;
        font-size: 0.7rem;
    }
}