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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --background: #ffffff;
    --light-background: #f8fafc;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background);
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.header {
    background: var(--background);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 80px;
    display: flex;
    align-items: center;
    will-change: transform;
}

.navbar {
    width: 100%;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.logo span {
    font-size: 0.875rem;
    color: var(--light-text);
    font-weight: 400;
    line-height: 1.2;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: 0.3s;
}

main {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
}

.hero {
    background: linear-gradient(135deg, var(--light-background) 0%, var(--background) 100%);
    padding: 4rem 0;
    min-height: 500px;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.125rem;
    color: var(--light-text);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    min-height: 48px;
    line-height: 1.2;
    will-change: transform;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.hero-image {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4/3;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1rem;
    display: block;
    will-change: transform;
}

.services {
    padding: 4rem 0;
    background: var(--light-background);
}

.services h2 {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-color);
}

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

.service-card {
    background: var(--background);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    will-change: transform;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.2;
}

.service-card p {
    color: var(--light-text);
    line-height: 1.6;
}

.why-choose-us {
    padding: 4rem 0;
    background: var(--background);
}

.why-choose-us h2 {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-color);
}

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

.feature {
    text-align: center;
    padding: 1.5rem;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1;
}

.feature h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    line-height: 1.2;
}

.feature p {
    color: var(--light-text);
    line-height: 1.6;
}

.about {
    padding: 4rem 0;
    background: var(--light-background);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.2;
}

.about-text p {
    font-size: 1.125rem;
    color: var(--light-text);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.about-image {
    position: relative;
    width: 100%;
    height: 320px;
    overflow: hidden;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 5/4;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1rem;
    display: block;
    will-change: transform;
}

.cta {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    text-align: center;
    color: white;
}

.cta h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.cta p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.4;
}

.cta .btn {
    background: white;
    color: var(--primary-color);
    font-size: 1.125rem;
    padding: 1rem 2rem;
}

.cta .btn:hover {
    background: var(--light-background);
    transform: translateY(-2px);
}

.contact {
    padding: 4rem 0;
    background: var(--background);
}

.contact h2 {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    min-height: 60px;
}

.contact-icon {
    font-size: 1.5rem;
    margin-top: 0.25rem;
    line-height: 1;
}

.contact-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    line-height: 1.2;
}

.contact-item p {
    color: var(--light-text);
    line-height: 1.4;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

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

.contact-form {
    background: var(--light-background);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    min-height: 400px;
}

.contact-form h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.2;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
    min-height: 48px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
    line-height: 1.2;
}

.footer-section p,
.footer-section li {
    color: #d1d5db;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

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

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

.developer-credit {
    font-size: 0.8rem;
    margin-top: 0.5rem;
    opacity: 0.8;
}

.developer-credit a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.developer-credit a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .services-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 769px) {
    .mobile-menu-btn {
        display: none !important;
    }
    
    .nav-links {
        display: flex !important;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .hero-content h2 {
        font-size: 1.75rem;
    }
    
    .services,
    .why-choose-us,
    .about,
    .cta,
    .contact {
        padding: 2rem 0;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (max-width: 768px) {
    .hero-image,
    .about-image {
        aspect-ratio: auto;
        height: auto;
        min-height: 250px;
    }
}

/* Critical CSS for above-the-fold content */
.hero-content h2,
.hero-content p,
.hero-buttons {
    opacity: 1;
    transform: translateY(0);
}

/* Performance optimizations */
img {
    max-width: 100%;
    height: auto;
}

/* Layout shift prevention */
.hero-image,
.about-image {
    contain: layout style paint;
}

/* Font loading optimization */
@font-face {
    font-family: 'Inter';
    font-display: swap;
}

/* Smooth scrolling for modern browsers */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* PC ve Desktop uyumluluğu için ek medya sorguları */
@media (min-width: 769px) {
    .hero .container {
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
    }
    
    .hero-content h2 {
        font-size: 3rem;
    }
    
    .hero-content p {
        font-size: 1.25rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
    }
    
    .nav-links {
        display: flex !important;
    }
    
    .mobile-menu-btn {
        display: none !important;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 1200px;
        padding: 0 2rem;
    }
    
    .hero {
        padding: 6rem 0;
        min-height: 600px;
    }
    
    .hero-content h2 {
        font-size: 3.5rem;
    }
    
    .services,
    .why-choose-us,
    .about,
    .cta,
    .contact {
        padding: 6rem 0;
    }
    
    .service-card {
        padding: 2.5rem;
        min-height: 250px;
    }
    
    .feature {
        padding: 2rem;
        min-height: 180px;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-content h2 {
        font-size: 4rem;
    }
}

/* PC'de hover efektleri */
@media (min-width: 769px) {
    .btn:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-lg);
    }
    
    .service-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links a:hover {
        color: var(--primary-color);
        transform: translateY(-2px);
    }
}

/* PC'de daha iyi görünüm için ek stiller */
@media (min-width: 769px) {
    .hero-image {
        height: 400px;
    }
    
    .about-image {
        height: 400px;
    }
    
    .btn {
        padding: 1rem 2rem;
        font-size: 1.125rem;
    }
    
    .hero-buttons {
        gap: 1.5rem;
    }
}

/* Tarayıcı uyumluluğu için vendor prefix'ler */
.btn {
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.service-card {
    -webkit-transition: transform 0.3s ease, box-shadow 0.3s ease;
    -moz-transition: transform 0.3s ease, box-shadow 0.3s ease;
    -o-transition: transform 0.3s ease, box-shadow 0.3s ease;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* PC'de daha iyi okunabilirlik */
@media (min-width: 769px) {
    body {
        font-size: 18px;
        line-height: 1.7;
    }
    
    .hero-content p {
        font-size: 1.25rem;
        line-height: 1.8;
    }
    
    .service-card p {
        font-size: 1.125rem;
        line-height: 1.7;
    }
}