/* CSS Design System - Ufuk Demir Doğrama Çelik Çatı */

:root {
    /* Color Palette derived from logo */
    --brand-navy: #16325C;
    --brand-navy-dark: #0f223f;
    --brand-navy-light: #20457d;
    --brand-orange: #FF9F29;
    --brand-orange-hover: #e58d1e;
    --brand-orange-light: #fff5e6;
    --brand-gray: #5A6B7C;
    --brand-gray-light: #e9ecef;
    
    /* Layout Colors */
    --text-dark: #2d3748;
    --text-muted: #718096;
    --text-light: #ffffff;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --bg-dark: #1a202c;
    --bg-dark-section: #111827;
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* UI Constants */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

/* Reset and Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--brand-navy);
    font-weight: 600;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: var(--brand-navy-light);
    border-radius: var(--border-radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--brand-orange);
}

/* Button Component Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
}

.btn-primary {
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
}

.btn-primary:hover {
    background-color: var(--brand-orange-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 159, 41, 0.4);
}

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

.btn-secondary:hover {
    background-color: var(--text-light);
    color: var(--brand-navy);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background-color: #25d366;
    color: var(--text-light);
}

.btn-whatsapp:hover {
    background-color: #20ba5a;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
}

.btn-light {
    background-color: var(--bg-light);
    color: var(--brand-navy);
}

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

/* Section Common Header Styles */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    font-size: 0.85rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--brand-orange);
    display: block;
    margin-bottom: 8px;
}

.section-header h2 {
    font-size: 2.2rem;
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 10px;
}

.header-line {
    width: 60px;
    height: 4px;
    background-color: var(--brand-orange);
    margin: 0 auto;
    border-radius: 2px;
}

/* Top Contact Bar */
.top-bar {
    background-color: var(--brand-navy-dark);
    color: var(--text-light);
    font-size: 0.85rem;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-info {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.top-info span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-info i {
    color: var(--brand-orange);
}

.top-socials a {
    background-color: rgba(255, 159, 41, 0.15);
    color: var(--brand-orange);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(255, 159, 41, 0.3);
}

.top-socials a:hover {
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
}

/* Main Navigation Header */
.main-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition-smooth);
}

.main-header.scrolled {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-md);
    padding: 4px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    transition: var(--transition-smooth);
}

.main-header.scrolled .header-container {
    height: 70px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.site-logo {
    height: 55px;
    width: auto;
    object-fit: contain;
    transition: var(--transition-smooth);
}

.main-header.scrolled .site-logo {
    height: 48px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--brand-navy);
}

.logo-text span {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--brand-gray);
    letter-spacing: 1.5px;
}

/* Navbar Menu Links */
.nav-menu ul {
    list-style: none;
    display: flex;
    gap: 32px;
}

.nav-menu a {
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    padding: 8px 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--brand-orange);
    transition: var(--transition-smooth);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: var(--brand-navy);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

/* Hero Section */
.hero-section {
    position: relative;
    background: url('images/celik_cati_iskelet.jpg') no-repeat center center/cover;
    height: calc(100vh - 120px);
    min-height: 600px;
    display: flex;
    align-items: center;
    color: var(--text-light);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(22, 50, 92, 0.95) 0%, rgba(15, 34, 63, 0.75) 100%);
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 680px;
}

.hero-badge {
    background-color: rgba(255, 159, 41, 0.15);
    border: 1px solid rgba(255, 159, 41, 0.4);
    color: var(--brand-orange);
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 24px;
    animation: fadeInDown 0.8s ease;
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--text-light);
    line-height: 1.2;
    margin-bottom: 20px;
    animation: fadeInLeft 0.8s ease;
}

.hero-content .highlight {
    color: var(--brand-orange);
}

.hero-content p {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
    font-weight: 300;
    animation: fadeInUp 0.8s ease;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease;
}

/* Wave Divider for visual split */
.wave-divider {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    transform: rotate(180deg);
    z-index: 2;
}

.wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 60px;
}

.wave-divider .shape-fill {
    fill: var(--bg-light);
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* About Section */
.about-section {
    background-color: var(--bg-light);
    padding: 100px 0;
}

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

.about-image-side {
    position: relative;
}

.image-box {
    position: relative;
    padding-right: 30px;
    padding-bottom: 30px;
}

.image-box::before {
    content: '';
    position: absolute;
    right: 0;
    bottom: 0;
    width: 90%;
    height: 90%;
    border: 8px solid var(--brand-orange);
    border-radius: var(--border-radius-md);
    z-index: 1;
}

.about-main-img {
    position: relative;
    z-index: 2;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    object-fit: cover;
    width: 100%;
    height: 400px;
}

.experience-badge {
    position: absolute;
    left: -20px;
    bottom: -10px;
    background-color: var(--brand-navy);
    color: var(--text-light);
    padding: 20px 30px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.experience-badge .number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--brand-orange);
    line-height: 1;
}

.experience-badge .text {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
}

.about-text-side h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.about-text-side p {
    margin-bottom: 20px;
    color: var(--text-muted);
}

.features-list {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-item {
    display: flex;
    gap: 16px;
}

.feature-icon {
    font-size: 1.5rem;
    color: var(--brand-orange);
    margin-top: 3px;
}

.feature-info h3 {
    font-size: 1.15rem;
    margin-bottom: 4px;
}

.feature-info p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Services Section */
.services-section {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--bg-light);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    border: 1px solid rgba(0,0,0,0.03);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 159, 41, 0.2);
}

.service-img-wrapper {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.service-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.service-card:hover .service-img-wrapper img {
    transform: scale(1.08);
}

.service-body {
    padding: 30px;
    position: relative;
    flex-grow: 1;
}

.service-icon-box {
    width: 60px;
    height: 60px;
    background-color: var(--brand-navy);
    color: var(--brand-orange);
    font-size: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -30px;
    left: 30px;
    box-shadow: var(--shadow-md);
    border: 3px solid var(--bg-light);
}

.service-card:hover .service-icon-box {
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
}

.service-body h3 {
    font-size: 1.25rem;
    margin-top: 10px;
    margin-bottom: 15px;
}

.service-body p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Gallery Section */
.gallery-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.gallery-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    background-color: var(--bg-white);
    color: var(--brand-navy);
    border: 1px solid var(--brand-gray-light);
    padding: 10px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.filter-btn.active,
.filter-btn:hover {
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
    border-color: var(--brand-orange);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    transition: var(--transition-smooth);
}

.gallery-item {
    background-color: var(--bg-white);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    cursor: pointer;
}

.gallery-image-box {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.gallery-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.gallery-hover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(22, 50, 92, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition-smooth);
    padding: 24px;
}

.gallery-zoom-icon {
    width: 50px;
    height: 50px;
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 16px;
    transform: scale(0.7);
    transition: var(--transition-smooth);
}

.gallery-info {
    text-align: center;
    transform: translateY(15px);
    transition: var(--transition-smooth);
}

.gallery-info h4 {
    color: var(--text-light);
    font-size: 1.15rem;
    margin-bottom: 4px;
}

.gallery-info p {
    color: var(--brand-orange);
    font-size: 0.85rem;
    font-weight: 500;
}

.gallery-item:hover .gallery-hover-overlay {
    opacity: 1;
}

.gallery-item:hover .gallery-image-box img {
    transform: scale(1.08);
}

.gallery-item:hover .gallery-zoom-icon {
    transform: scale(1);
}

.gallery-item:hover .gallery-info {
    transform: translateY(0);
}

/* CTA Call-to-Action Section */
.cta-section {
    background: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand-navy-dark) 100%);
    color: var(--text-light);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(255, 159, 41, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.cta-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.cta-content h2 {
    color: var(--text-light);
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.cta-content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 680px;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex-shrink: 0;
}

.cta-buttons .btn {
    width: 260px;
}

/* References Section */
.references-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.reference-card {
    background-color: var(--bg-white);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius-md);
    padding: 24px 20px;
    height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
    border-bottom: 3px solid transparent;
}

.reference-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--brand-orange);
}

.ref-icon {
    font-size: 1.5rem;
    color: var(--brand-navy);
    margin-bottom: 8px;
    transition: var(--transition-smooth);
}

.reference-card:hover .ref-icon {
    color: var(--brand-orange);
    transform: scale(1.1);
}

.reference-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.3;
}

/* Contact Section */
.contact-section {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.contact-grid {
    max-width: 760px;
    margin: 0 auto;
}

.contact-info-panel {
    background-color: var(--bg-light);
    border-radius: var(--border-radius-md);
    padding: 48px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info-panel h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.contact-info-panel > p {
    color: var(--text-muted);
    margin-bottom: 36px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-detail-item {
    display: flex;
    gap: 20px;
}

.detail-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(22, 50, 92, 0.08);
    color: var(--brand-navy);
    font-size: 1.25rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition-smooth);
}

.contact-detail-item:hover .detail-icon {
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
}

.detail-text h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

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

.detail-text p a:hover {
    color: var(--brand-orange);
}

/* Site Footer */
.site-footer {
    background-color: var(--bg-dark-section);
    color: rgba(255, 255, 255, 0.75);
    padding: 80px 0 0;
    border-top: 4px solid var(--brand-orange);
}

.footer-container {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1.2fr;
    gap: 56px;
    padding-bottom: 60px;
}

.footer-brand-side {
    max-width: 580px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.footer-logo img {
    height: 60px;
    width: auto;
}

.footer-logo span {
    font-family: var(--font-heading);
    color: var(--text-light);
    font-size: 1.35rem;
    font-weight: 700;
}

.footer-brand-side p {
    line-height: 1.7;
    font-size: 0.95rem;
}

.footer-links-side h4,
.footer-map-side h4 {
    color: var(--text-light);
    font-size: 1.2rem;
    margin-bottom: 24px;
    position: relative;
    padding-bottom: 8px;
}

.footer-links-side h4::after,
.footer-map-side h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--brand-orange);
}

.footer-links-side ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links-side a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.footer-links-side a i {
    color: var(--brand-orange);
    font-size: 0.75rem;
}

.footer-links-side a:hover {
    color: var(--brand-orange);
    padding-left: 6px;
}

.footer-map-link {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    line-height: 1.6;
    font-size: 0.95rem;
}

.footer-map-link i {
    color: var(--brand-orange);
    font-size: 1.2rem;
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-map-link:hover {
    color: var(--brand-orange);
}

.footer-bottom {
    background-color: rgba(0,0,0,0.3);
    padding: 24px 0;
    font-size: 0.85rem;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

/* Custom Lightbox Modal */
.lightbox-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 20, 35, 0.95);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

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

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 30px;
    color: var(--text-light);
    font-size: 3rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    z-index: 1002;
    user-select: none;
}

.lightbox-close:hover {
    color: var(--brand-orange);
}

.lightbox-prev,
.lightbox-next {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    z-index: 1001;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
    border-color: var(--brand-orange);
}

.lightbox-prev { left: 30px; }
.lightbox-next { right: 30px; }

.lightbox-content-box {
    max-width: 900px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.lightbox-content-box img {
    max-height: 75vh;
    max-width: 100%;
    object-fit: contain;
    border-radius: var(--border-radius-sm);
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    border: 4px solid var(--text-light);
}

.lightbox-caption {
    width: 100%;
    background-color: var(--bg-white);
    padding: 20px;
    border-radius: var(--border-radius-sm);
    margin-top: 15px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.lightbox-caption h4 {
    color: var(--brand-navy);
    font-size: 1.15rem;
    margin-bottom: 4px;
}

.lightbox-caption p {
    color: var(--brand-gray);
    font-size: 0.9rem;
}

/* Scroll To Top Button */
.scroll-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 50px;
    height: 50px;
    background-color: var(--brand-navy);
    color: var(--text-light);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-md);
    z-index: 99;
}

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

.scroll-to-top:hover {
    background-color: var(--brand-orange);
    color: var(--brand-navy-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* RESPONSIVE DESIGN - Responsive Breakpoints */

/* ─── Geniş Tablet (max 1024px) ─────────────────────── */
@media (max-width: 1024px) {
    .hero-content h1 { font-size: 3rem; }
    .about-grid { gap: 40px; }
    .cta-container { flex-direction: column; text-align: center; }
    .cta-buttons { width: 100%; align-items: center; }
}

/* ─── Tablet Yatay (max 900px) ─────────────────────── */
@media (max-width: 900px) {
    .nav-toggle { display: flex; }

    .nav-menu {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--bg-white);
        box-shadow: var(--shadow-md);
        padding: 24px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-15px);
        transition: var(--transition-smooth);
    }
    .main-header.scrolled .nav-menu { top: 70px; }
    .nav-menu.active { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav-menu ul { flex-direction: column; gap: 16px; text-align: center; }
    .nav-menu a { display: block; padding: 8px; }
    .nav-menu a::after { display: none; }
    .nav-toggle.active .bar:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
    .nav-toggle.active .bar:nth-child(2) { opacity: 0; }
    .nav-toggle.active .bar:nth-child(3) { transform: rotate(-45deg) translate(6px, -7px); }

    .about-grid { grid-template-columns: 1fr; }
    .about-image-side { order: 2; max-width: 500px; margin: 0 auto; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-container { grid-template-columns: 1fr; gap: 40px; }

    .lightbox-prev, .lightbox-next { width: 45px; height: 45px; font-size: 1.2rem; }
    .lightbox-prev { left: 10px; }
    .lightbox-next { right: 10px; }
}

/* ─── Tablet (max 768px) ─────────────────────────────── */
@media (max-width: 768px) {
    /* Top bar: dikey yığıl */
    .top-bar { font-size: 0.78rem; padding: 6px 0; }
    .top-bar-content { flex-direction: column; gap: 6px; align-items: flex-start; }
    .top-info { gap: 10px; flex-wrap: wrap; }

    /* Hero */
    .hero-section { height: auto; min-height: 100svh; padding: 80px 0 60px; }
    .hero-content h1 { font-size: 2.1rem; line-height: 1.25; }
    .hero-content p { font-size: 1rem; }
    .hero-actions { flex-direction: column; gap: 12px; }
    .hero-actions .btn { width: 100%; justify-content: center; }

    /* Section header */
    .section-header { margin-bottom: 36px; }
    .section-header h2 { font-size: 1.75rem; }

    /* About */
    .about-section { padding: 60px 0; }
    .about-text-side h2 { font-size: 1.8rem; }
    .image-box { padding-right: 20px; padding-bottom: 20px; }
    .about-main-img { height: 280px; }
    .experience-badge { left: -10px; padding: 14px 18px; }
    .experience-badge .number { font-size: 1.8rem; }

    /* Services */
    .services-section { padding: 60px 0; }
    .services-grid { grid-template-columns: 1fr; gap: 20px; }

    /* Gallery */
    .gallery-section { padding: 60px 0; }
    .gallery-grid { grid-template-columns: 1fr; gap: 16px; }
    .gallery-image-box { height: 220px; }
    .gallery-filters { gap: 8px; margin-bottom: 28px; }
    .filter-btn { padding: 8px 16px; font-size: 0.82rem; }

    /* CTA */
    .cta-section { padding: 50px 0; }
    .cta-content h2 { font-size: 1.6rem; }
    .cta-buttons { width: 100%; }
    .cta-buttons .btn { width: 100%; }

    /* References */
    .references-section { padding: 60px 0; }
    .references-grid { grid-template-columns: 1fr 1fr; gap: 14px; }

    /* Contact */
    .contact-section { padding: 60px 0; }
    .contact-info-panel { padding: 28px 20px; }

    /* Footer */
    .site-footer { padding: 50px 0 0; }
    .footer-bottom-content { flex-direction: column; text-align: center; }

    /* Lightbox */
    .lightbox-modal { padding: 12px; }
    .lightbox-close { top: 12px; right: 16px; font-size: 2.4rem; }
    .lightbox-prev { left: 4px; width: 38px; height: 38px; font-size: 1rem; }
    .lightbox-next { right: 4px; width: 38px; height: 38px; font-size: 1rem; }
    .lightbox-content-box img { max-height: 60vh; }

    /* Floating WhatsApp butonu */
    .whatsapp-float {
        display: flex !important;
        position: fixed;
        bottom: 20px;
        right: 16px;
        width: 56px;
        height: 56px;
        background-color: #25d366;
        color: #fff;
        border-radius: 50%;
        align-items: center;
        justify-content: center;
        font-size: 1.7rem;
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
        z-index: 200;
        transition: var(--transition-smooth);
        text-decoration: none;
    }
    .whatsapp-float:hover,
    .whatsapp-float:active { background-color: #20ba5a; transform: scale(1.1); }

    /* Scroll-to-top WhatsApp'ın üstünde */
    .scroll-to-top { bottom: 88px; }
}

/* ─── Küçük Telefon (max 480px) ──────────────────────── */
@media (max-width: 480px) {
    html { font-size: 15px; }
    .container { padding: 0 16px; }
    .top-bar { display: none; }
    .site-logo { height: 42px; }
    .logo-text { font-size: 1rem; }
    .hero-section { padding: 60px 0 50px; }
    .hero-badge { font-size: 0.72rem; padding: 5px 12px; }
    .hero-content h1 { font-size: 1.75rem; }
    .hero-content p { font-size: 0.92rem; }
    .about-section { padding: 50px 0; }
    .about-text-side h2 { font-size: 1.5rem; }
    .about-main-img { height: 220px; }
    .features-list { gap: 18px; }
    .services-section { padding: 50px 0; }
    .gallery-section { padding: 50px 0; }
    .gallery-image-box { height: 190px; }
    .cta-section { padding: 40px 0; }
    .cta-content h2 { font-size: 1.4rem; }
    .references-section { padding: 50px 0; }
    .references-grid { grid-template-columns: 1fr; }
    .reference-card { height: auto; padding: 18px 14px; }
    .contact-section { padding: 50px 0; }
    .contact-info-panel { padding: 24px 16px; }
    .contact-info-panel h3 { font-size: 1.4rem; }
    .detail-icon { width: 42px; height: 42px; font-size: 1rem; }
    .section-header h2 { font-size: 1.5rem; }
    .scroll-to-top { right: 16px; bottom: 88px; width: 44px; height: 44px; font-size: 1rem; }
}

/* Floating WhatsApp - varsayılan olarak gizli (768px altında gösterilir) */
.whatsapp-float { display: none; }