/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7a;
    --border-color: #252533;
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-2: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1150px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
}

.logo-intro-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    pointer-events: none;
    background: var(--bg-primary);
}

.logo-intro-canvas.hidden {
    display: none;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    position: relative;
}

.logo {
    height: 32px;
    width: auto;
    display: block;
    object-fit: contain;
    will-change: transform, filter;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: none;
    will-change: transform, filter;
}

.logo-text.show {
    display: inline;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    position: relative;
}

.nav-menu-divider {
    display: none;
}

.nav-menu-language {
    display: none;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-menu {
    position: relative;
}

.nav-menu-indicator {
    position: absolute;
    bottom: -4px;
    left: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
}

.nav-menu a::after {
    display: none;
}

.nav-menu a:hover::after {
    display: none;
}

.nav-menu a.active {
    color: var(--text-primary);
}

.nav-menu a.active::after {
    display: none;
}

.nav-menu-language {
    list-style: none;
    padding-top: 0.5rem;
}

.language-toggle.desktop {
    display: flex;
}

.language-toggle.mobile {
    display: none;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

.language-toggle {
    margin-left: 2rem;
    position: relative;
}

.lang-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    position: relative;
    min-width: 60px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.lang-btn:hover {
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.lang-btn.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.lang-text {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.15s;
    transform-origin: center;
    backface-visibility: hidden;
}

.lang-separator {
    display: none;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    z-index: 0;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
}

.light-sweep-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(99, 102, 241, 0.08) 20%,
        rgba(139, 92, 246, 0.12) 50%,
        rgba(99, 102, 241, 0.08) 80%,
        transparent 100%
    );
    width: 200%;
    will-change: transform;
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: left;
    max-width: 700px;
}

.hero-logo-title {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    justify-content: flex-start;
}

.hero-logo {
    height: 120px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin: 0;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.6;
}

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

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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


/* Section Styles */
section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    text-align: left;
    margin-bottom: 5rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
}

/* Services Section */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.service-card {
    background: var(--bg-tertiary);
    padding: 3rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.service-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Why Us Section */
.why-us-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
}

.why-us-item {
    position: relative;
    padding-left: 4.5rem;
}

.why-us-number {
    position: absolute;
    left: 0;
    top: 0;
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    line-height: 1;
}

.why-us-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.why-us-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* References Section */
.references {
    background: var(--bg-secondary);
}

.references-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.reference-card {
    background: var(--bg-tertiary);
    padding: 3rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.reference-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.reference-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}

.reference-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-style: normal;
}

.reference-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.reference-author strong {
    color: var(--text-primary);
}

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

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

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

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.contact-icon svg {
    width: 20px;
    height: 20px;
}

.contact-details h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-details p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.contact-form {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.form-heading {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    text-align: center;
}


.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
}

.form-group label.required::after {
    content: ' *';
    color: var(--accent-color);
}

.form-group input,
.form-group textarea {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 0.875rem;
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-family: inherit;
    transition: var(--transition);
    width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: var(--text-muted);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 90px;
}

.error-message {
    font-size: 0.875rem;
    color: var(--accent-color);
    display: none;
    transition: opacity 0.3s ease;
}

.error-message.show {
    display: block;
    opacity: 1;
}

/* Kırmızı çizgi sadece hata mesajı gösterildiğinde */
.form-group input[aria-invalid="true"],
.form-group textarea[aria-invalid="true"] {
    border-color: var(--accent-color);
}

.contact-form .btn {
    margin-top: 0.5rem;
    width: 100%;
    justify-self: flex-start;
    padding: 0.875rem 1.5rem;
    font-size: 0.9375rem;
}

.form-success-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    text-align: center;
    min-height: 300px;
}

.success-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(34, 197, 94, 0.1);
    border: 2px solid #22c55e;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #22c55e;
    flex-shrink: 0;
}

.success-icon svg {
    width: 32px;
    height: 32px;
}

.success-message {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}


.footer-brand .logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
}

.footer-links h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
    padding-left: 4px;
}


.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--gradient-1);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.back-to-top:active {
    transform: translateY(-2px);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .light-sweep-overlay {
        display: none !important;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 0 2rem;
        border-bottom: 1px solid var(--border-color);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        gap: 0;
        align-items: center;
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }
    
    .nav-menu li {
        width: 100%;
        text-align: center;
    }
    
    .nav-menu li a {
        display: inline-block;
        padding: 1rem 0;
        position: relative;
        text-align: center;
    }
    
    /* Hide sliding indicator on mobile, use individual ::after instead */
    .nav-menu-indicator {
        display: none;
    }
    
    /* Override desktop ::after for mobile - short centered line, no white gradient */
    .nav-menu li a::after {
        content: '';
        position: absolute;
        bottom: 0.5rem;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 1px;
        background: transparent;
        transition: var(--transition);
        opacity: 1;
        display: block;
    }
    
    .nav-menu li a:hover::after {
        width: 60px;
        background: var(--primary-color);
    }
    
    /* Active link - short gradient line on mobile */
    .nav-menu li a.active::after {
        width: 100%;
        height: 2px;
        background: var(--gradient-1);
        display: block;
    }

    .nav-menu.active {
        max-height: 500px;
        padding: 2rem;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    /* Blur overlay from nav-menu to bottom of screen - only on mobile */
    body.mobile-menu-active {
        overflow: hidden;
    }

    body.mobile-menu-active::after {
        content: '';
        position: fixed;
        top: var(--nav-menu-bottom, 0);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 10, 15, 0.3);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        z-index: 998;
        pointer-events: auto;
        transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .mobile-menu-toggle {
        display: flex;
    }
    
    .language-toggle.desktop {
        display: none;
    }
    
    .language-toggle.mobile {
        display: flex;
        margin-left: 0;
        justify-content: center;
    }
    
    .nav-menu-divider {
        display: block;
        margin: 1.5rem auto;
        width: 80px;
        height: 2px;
        background: var(--text-secondary);
        border: none;
        list-style: none;
        padding: 0;
    }
    
    .nav-menu-language {
        display: block;
        width: 100%;
        padding-top: 0.5rem;
        text-align: center;
    }
    
    .nav-menu-language .language-toggle {
        display: flex;
        justify-content: center;
        margin: 0;
    }
    
    .nav-menu-language .lang-btn {
        width: auto;
        margin: 0 auto;
        justify-content: center;
    }
    
    .lang-btn {
        min-width: 50px;
        height: 32px;
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

    .services-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .why-us-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .references-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 1rem;
    }
    
    .contact-content {
        gap: 2rem;
    }
    
    .contact-info {
        gap: 1rem;
    }
    
    .contact-item {
        gap: 0.875rem;
    }
    
    .contact-icon {
        width: 36px;
        height: 36px;
    }
    
    .contact-icon svg {
        width: 18px;
        height: 18px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .container {
        padding: 0 1.5rem;
    }

    section {
        padding: 4rem 0;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-logo-title {
        justify-content: center;
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-logo {
        height: 100px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .section-header {
        text-align: center;
    }
    
    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 44px;
        height: 44px;
    }
    
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .service-card,
    .reference-card {
        padding: 1.5rem;
    }
}