:root {
    --bg-start: #050508;
    --bg-card: rgba(255, 255, 255, 0.02);
    --accent: #5e6ad2;
    --accent-rgb: 94, 106, 210;
    --accent-hover: #6e79e0;
    --text-light: #f8fafc;
    --text-muted: #a1a1aa;
    --border-color: rgba(255, 255, 255, 0.08);
    --success: #25D366;
    --error: #ef4444;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 24px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    
    --nav-height: 70px;
    --max-width: 1200px;
    --container-padding: 24px;
}

@media (max-width: 768px) {
    :root {
        --container-padding: 16px;
        --space-lg: 1.5rem;
        --space-xl: 2.5rem;
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    background: var(--bg-start);
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

@media (max-width: 375px) {
    html { font-size: 15px; }
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg-start);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Arka Plan Efektleri */
.main-bg {
    position: fixed;
    inset: 0;
    z-index: -3;
    background: radial-gradient(circle at 50% -20%, #1a1a2e 0%, var(--bg-start) 100%);
}

.bg-overlay {
    position: fixed;
    inset: 0;
    z-index: -2;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
}

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: 
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    opacity: 0.08;
    pointer-events: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* GPU PERFORMANS OPTİMİZASYONLARI */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
    contain: layout style paint;
    will-change: transform;
}

/* Navigasyon - Mobil Stabil */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(5, 5, 8, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
    color: #fff;
    text-decoration: none;
    white-space: nowrap;
}

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

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    touch-action: manipulation;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: rgba(8, 8, 12, 0.98);
        flex-direction: column;
        justify-content: center;
        align-items: flex-start;
        padding: 2rem;
        gap: 1.5rem;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-left: 1px solid var(--border-color);
        backdrop-filter: blur(20px);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links a {
        font-size: 1.1rem;
        width: 100%;
        padding: 12px 0;
    }
    
    .nav-links a.btn {
        width: 100%;
        text-align: center;
        margin-top: 1rem;
    }
    
    .menu-toggle .icon-close {
        display: none;
    }
    
    .menu-toggle[aria-expanded="true"] .icon-menu {
        display: none;
    }
    
    .menu-toggle[aria-expanded="true"] .icon-close {
        display: block;
    }
}

/* Butonlar */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--accent);
    color: white !important;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
    touch-action: manipulation;
    min-height: 48px;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(var(--accent-rgb), 0.3);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.875rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-light) !important;
}

.btn-outline:hover {
    border-color: var(--accent);
    background: rgba(var(--accent-rgb), 0.1);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-top: var(--nav-height);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    text-align: center;
}

@media (max-width: 768px) {
    .hero {
        padding: 80px 0 50px;
    }
}

.badge {
    display: inline-block;
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    border: 1px solid rgba(var(--accent-rgb), 0.2);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 24px;
}

.hero h1 span {
    color: var(--accent);
    display: block;
}

.hero p {
    color: var(--text-muted);
    font-size: clamp(1rem, 2vw, 1.25rem);
    max-width: 600px;
    margin: 0 auto 40px;
    padding: 0 var(--container-padding);
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0 var(--container-padding);
}

/* Bento Grid - Stabil & Optimize */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 40px var(--container-padding);
}

.bento-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(10px);
    grid-column: span 6;
    transform: translateZ(0);
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.bento-item:hover {
    border-color: rgba(var(--accent-rgb), 0.4);
    transform: translateY(-3px) translateZ(0);
    background: rgba(255,255,255,0.04);
}

.bento-item.large {
    grid-column: span 8;
}

.bento-item.small {
    grid-column: span 4;
}

@media (max-width: 992px) {
    .bento-item,
    .bento-item.large,
    .bento-item.small {
        grid-column: span 6;
    }
}

@media (max-width: 768px) {
    .bento-grid {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    
    .bento-item,
    .bento-item.large,
    .bento-item.small {
        grid-column: 1;
        padding: 24px;
        transform: translateZ(0);
    }
    
    .gpu-accelerated {
        will-change: auto;
    }
}

.icon-box {
    width: 48px;
    height: 48px;
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.bento-item h2 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.bento-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Metodoloji Grid */
.methodology-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.methodology-item {
    text-align: center;
}

@media (max-width: 768px) {
    .methodology-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 20px !important;
    }
    
    .methodology-item div {
        width: 50px !important;
        height: 50px !important;
        font-size: 1.25rem !important;
    }
    .methodology-item h4 {
        font-size: 1rem !important;
    }
    .methodology-item p {
        font-size: 0.85rem !important;
    }
}

/* Süreç Sayfası - Optimize */
.process-header {
    padding: 100px 0 60px;
    text-align: center;
}

.process-header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -2px;
}

.process-stack {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding) 80px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.process-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    backdrop-filter: blur(10px);
    transform: translateZ(0);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.process-card:hover {
    border-color: rgba(var(--accent-rgb), 0.3);
    transform: translateY(-3px) translateZ(0);
}

@media (max-width: 768px) {
    .process-card {
        grid-template-columns: 1fr;
        padding: 24px;
        gap: 24px;
        transform: translateZ(0);
    }
    
    .process-card:nth-child(even) .card-content {
        order: 2;
    }
}

.card-num {
    display: inline-block;
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    border: 1px solid rgba(var(--accent-rgb), 0.2);
}

.card-content h2 {
    font-size: 1.75rem;
    margin-bottom: 12px;
}

.card-content p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 480px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

.feature-item h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    font-weight: 600;
}

.feature-item span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.card-visual {
    aspect-ratio: 4/3;
    background: rgba(0,0,0,0.3);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.visual-blob {
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, var(--accent) 0%, transparent 60%);
    opacity: 0.15;
    filter: blur(40px);
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Tech Tag */
.tech-tag {
    padding: 6px 12px;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    display: inline-block;
}

/* İletişim Formu */
.contact-section {
    padding: 80px 0;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    padding: 0 var(--container-padding);
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.form-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    backdrop-filter: blur(10px);
}

@media (max-width: 480px) {
    .form-box {
        padding: 24px;
    }
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 18px;
    color: white;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s;
    min-height: 48px;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255,255,255,0.06);
}

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

.security-notice {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

/* SSS Akordion */
.faq-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 100px var(--container-padding);
}

.faq-header {
    text-align: center;
    margin-bottom: 60px;
}

.faq-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.faq-header h1 span {
    color: var(--accent);
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.faq-question {
    padding: 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    touch-action: manipulation;
    transition: color 0.3s;
}

@media (max-width: 480px) {
    .faq-question {
        padding: 20px;
        font-size: 1rem;
    }
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent);
    flex-shrink: 0;
    margin-left: 16px;
    transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
    color: var(--text-muted);
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 24px 24px;
}

/* Footer */
.main-footer {
    border-top: 1px solid var(--border-color);
    padding: 80px 0 40px;
    margin-top: auto;
    background: rgba(0,0,0,0.2);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
    margin-bottom: 60px;
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

.footer-logo {
    margin-bottom: 16px;
    display: inline-block;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 24px;
    max-width: 300px;
}

@media (max-width: 768px) {
    .footer-desc {
        max-width: 100%;
    }
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    transform: translateY(-3px);
}

.footer-section h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-light);
}

.footer-nav,
.footer-contact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-nav a,
.footer-contact a,
.footer-contact span {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (max-width: 768px) {
    .footer-nav a,
    .footer-contact a,
    .footer-contact span {
        justify-content: center;
    }
}

.footer-nav a:hover,
.footer-contact a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
    margin: 0 8px;
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s;
    z-index: 999;
    box-shadow: 0 10px 20px rgba(var(--accent-rgb), 0.3);
    touch-action: manipulation;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    background: var(--accent-hover);
}

/* Alert Messages */
.alert {
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(37, 211, 102, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

/* Touch Optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        transform: none;
    }
    
    .bento-item:hover,
    .process-card:hover {
        transform: translateZ(0);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}