/* Color Palette */
:root {
    --primary: #005a7f;
    --primary-dark: #003d52;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --border-color: rgba(148, 163, 184, 0.1);
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border-color: rgba(15, 23, 42, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.8);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.3rem;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-image {
    height: 45px;
    width: auto;
    object-fit: contain;
    transition: all 0.3s ease;
}

.logo:hover .logo-image {
    transform: scale(1.05);
}

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

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

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

.nav-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.theme-toggle {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-primary);
}

.lang-btn {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.lang-btn:hover,
.lang-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-color: transparent;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
    color: var(--text-primary);
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.section-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(102, 126, 234, 0.15);
    color: var(--accent-primary);
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.section-badge.light {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn-primary {
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

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

.btn-primary.invert:hover {
    background: rgba(255, 255, 255, 0.9);
}

.btn-primary.large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.btn-primary.full-width {
    width: 100%;
    padding: 16px;
}

.btn-outline {
    padding: 14px 32px;
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-primary);
}

.btn-outline.light {
    border-color: white;
    color: white;
}

.btn-outline.light:hover {
    background: white;
    color: var(--accent-primary);
}

.btn-outline.large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.btn-outline.small {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    font-size: 0.85rem;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(10px);
}

.btn-outline.small:hover {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

/* Stats */
.hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card.counting {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.15);
}

.stat-card.count-complete {
    animation: subtlePulse 0.4s ease-out;
}

@keyframes subtlePulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

.stat-card:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.stat-card h3 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-primary);
    margin-bottom: 8px;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.05em;
}

.stat-card.counting h3 {
    color: var(--accent-secondary);
}

.stat-card p {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Remove the construction watermark */
.construction-watermark {
    display: none;
}

/* Sections */
section {
    padding: 80px 0;
}

.section-header {
    margin-bottom: 60px;
}

.section-header.center {
    text-align: center;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Certificates - PNG Galeri Sistemi */
.certificates {
    padding: 80px 0;
    background: var(--bg-primary);
}

.certificate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.certificate-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

.certificate-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
}

.cert-image {
    width: 100%;
    aspect-ratio: 210 / 297; /* A4 oranı */
    background: var(--bg-tertiary);
    position: relative;
    overflow: hidden;
}

.cert-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.certificate-card:hover .cert-image img {
    transform: scale(1.05);
}

.cert-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.75rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    z-index: 10;
}

.cert-info {
    padding: 20px;
    text-align: center;
}

.cert-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--accent-primary);
}

.cert-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Lightbox - Büyük görüntüleme */
.cert-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.cert-lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    position: relative;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: white;
    color: #000;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.lightbox-close:hover {
    transform: scale(1.1);
    background: var(--accent-primary);
    color: white;
}

/* Mobil için sertifika grid */
@media (max-width: 768px) {
    .certificate-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .cert-image {
        aspect-ratio: 210 / 250;
    }
}

/* Products Section */
.products {
    padding: 100px 0;
    background: var(--bg-primary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 20px;
    transition: all 0.4s ease;
}

.product-card:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.2);
}

.product-icon {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.product-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.product-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

.product-features li:last-child {
    border-bottom: none;
}

.product-link {
    display: inline-block;
    color: var(--accent-primary);
    font-weight: 600;
    text-decoration: none;
    margin-top: 16px;
    transition: all 0.3s ease;
}

.product-link:hover {
    transform: translateX(5px);
}

/* Values Section */
.values {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.value-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.value-card:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.value-icon {
    font-size: 2rem;
    color: var(--accent-primary);
    display: block;
    margin-bottom: 16px;
}

.value-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.value-card p {
    color: var(--text-secondary);
}

/* Products Page Styles */
.products-page {
    padding-top: 80px;
}

.page-hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    text-align: center;
}

.page-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.product-categories {
    padding: 80px 0;
}

.product-detail-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 100px;
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: 24px;
    border: 1px solid var(--border-color);
}

.product-detail-card.reverse {
    direction: rtl;
}

.product-detail-card.reverse > * {
    direction: ltr;
}

.product-detail-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.product-detail-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-detail-card:hover .product-detail-image img {
    transform: scale(1.05);
}

.product-icon-large {
    font-size: 4rem;
    display: block;
    margin-bottom: 20px;
}

.product-detail-content h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.product-detail-content > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.product-specs {
    background: var(--bg-primary);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.product-specs h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--accent-primary);
}

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

.product-specs li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.product-specs li:last-child {
    border-bottom: none;
}

.product-specs strong {
    color: var(--text-primary);
    font-weight: 600;
}

.product-applications {
    margin-top: 24px;
}

.product-applications h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.application-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.application-tags span {
    padding: 8px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--accent-primary);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--accent-primary);
    font-weight: 500;
    transition: all 0.3s ease;
}

.application-tags span:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.cta-section {
    padding: 60px 0;
    background: linear-gradient(135deg, #0a0a0a 0%, #1f1f1f 100%); /* Kırmızı → Siyah */
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 12px;
}

.cta-content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    line-height: 1.6;
}

/* Mission Section */
.mission {
    padding: 100px 0;
    background: var(--bg-primary);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.mission-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 48px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.mission-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.15);
}

.mission-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 24px;
}

.mission-card h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.mission-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

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

.mission-card li {
    padding: 12px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-secondary);
}

.mission-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

/* Journey Section - Siyah tonlar */
.journey {
    padding: 60px 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%); /* Kırmızı → Siyah */
    text-align: center;
    position: relative;
    overflow: hidden;
}

.journey-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.journey-content h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
}

.journey-content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    line-height: 1.6;
}

/* Brands Section */
.brands {
    padding: 80px 0;
    background: var(--bg-primary);
    overflow: hidden;
}

.brands-slider {
    margin-top: 60px;
    position: relative;
    overflow: hidden;
    padding: 20px 0;
}

.brands-slider::before,
.brands-slider::after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.brands-slider::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-primary), transparent);
}

.brands-slider::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-primary), transparent);
}

.brands-track {
    display: flex;
    gap: 60px;
    animation: brandScroll 40s linear infinite;
}

.brands-track:hover {
    animation-play-state: paused;
}

@keyframes brandScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.brand-item {
    flex-shrink: 0;
    width: 200px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.brand-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.brand-item img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: none; /* grayscale kaldırıldı - renkli */
    opacity: 1; /* tam görünür */
    transition: all 0.3s ease;
}

.brand-item:hover img {
    filter: none; /* grayscale kaldırıldı */
    opacity: 1;
    transform: scale(1.1); /* sadece büyüme efekti */
}

/* Feedback Section */
.feedback {
    padding: 100px 0;
    background: var(--bg-primary);
}

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

.feedback-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feedback-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.feedback-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.feedback-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.feedback-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.feedback-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 20px;
}

.feedback-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feedback-card p {
    color: var(--text-secondary);
}

.feedback-form {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-secondary);
    padding: 48px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

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

.form-group label {
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-contact {
    list-style: none;
    padding: 0;
}

.footer-contact li {
    padding: 8px 0;
    color: var(--text-secondary);
    display: flex;
    gap: 8px;
}

.footer-socials {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.footer-socials a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.footer-socials a:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

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

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

/* Under Construction Watermark */
/* .construction-watermark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    font-size: 6rem;
    font-weight: 900;
    color: rgba(102, 126, 234, 0.05);
    pointer-events: none;
    z-index: 9999;
    white-space: nowrap;
    user-select: none;
    letter-spacing: 10px;
}

[data-theme="light"] .construction-watermark {
    color: rgba(102, 126, 234, 0.08);
}

@media (max-width: 768px) {
    .construction-watermark {
        font-size: 3rem;
        letter-spacing: 5px;
    }
} */

/* Clients & OEM Approvals Section */
.clients {
    padding: 80px 0;
    background: var(--bg-secondary);
    overflow: hidden;
}

.clients-slider {
    margin-top: 60px;
    position: relative;
    overflow: hidden;
    padding: 20px 0;
}

.clients-slider::before,
.clients-slider::after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.clients-slider::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-secondary), transparent);
}

.clients-slider::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-secondary), transparent);
}

.clients-track {
    display: flex;
    gap: 40px;
    animation: clientsScroll 50s linear infinite;
}

.clients-track:hover {
    animation-play-state: paused;
}

@keyframes clientsScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.client-item {
    flex-shrink: 0;
    width: 180px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    transition: all 0.3s ease;
}

.client-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.client-item img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: none; /* grayscale kaldırıldı - renkli */
    opacity: 1; /* tam görünür */
    transition: all 0.3s ease;
}

.client-item:hover img {
    transform: scale(1.1); /* Hover'da büyüme efekti */
}

/* Mobil için clients slider */
@media (max-width: 768px) {
    .clients-track {
        gap: 30px;
        animation-duration: 35s;
    }
    
    .client-item {
        width: 140px;
        height: 70px;
    }
}

/* Responsive - Mobile */
@media (max-width: 1024px) {
    .tech-grid,
    .product-detail-card {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .mission-grid {
        grid-template-columns: 1fr;
    }
    
    .page-hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .brands-track {
        gap: 40px;
        animation-duration: 30s;
    }
    
    .brand-item {
        width: 160px;
        height: 80px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .product-detail-card {
        padding: 24px;
        margin-bottom: 60px;
    }
    
    .product-detail-image img {
        height: 300px;
    }
    
    .product-icon-large {
        font-size: 3rem;
    }
    
    .product-detail-content h2 {
        font-size: 1.8rem;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary.large,
    .btn-outline.large {
        width: 100%;
        max-width: 300px;
    }
}

/* Kompakt ürün kartları için stil */
.product-detail-card.compact {
    padding: 24px;
    margin-bottom: 40px;
    gap: 30px;
}

.product-detail-card.compact .product-detail-image {
    border-radius: 12px;
}

.product-detail-card.compact .product-detail-image img {
    height: 250px;
}

.product-detail-card.compact .product-icon-large {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.product-detail-card.compact .product-detail-content h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.product-detail-card.compact .product-detail-content > p {
    font-size: 0.95rem;
    margin-bottom: 16px;
}

/* Mobil için ürün kartları */
@media (max-width: 768px) {
    .product-detail-card.compact {
        padding: 16px;
        margin-bottom: 30px;
    }
    
    .product-detail-card.compact .product-detail-image img {
        height: 200px;
    }
    
    .product-detail-card.compact .product-icon-large {
        font-size: 2rem;
    }
    
    .product-detail-card.compact .product-detail-content h2 {
        font-size: 1.3rem;
    }
}