/* =====================================================
   HEFA YAZILIM - ANA STİL DOSYASI
   Kurumsal: Beyaz, Lacivert, Siyah Temalı
   ===================================================== */

/* ==================== IMPORTS ==================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@300;400;500;600;700;800&family=Playfair+Display:wght@400;500;600;700;800;900&display=swap');

/* ==================== CSS VARIABLES ==================== */
:root {
    /* Renkler - Kurumsal */
    --color-primary: #0f172a;         /* Koyu Lacivert */
    --color-primary-light: #1e293b;   /* Orta Lacivert */
    --color-secondary: #1e3a5f;       /* Steel Blue */
    --color-accent: #2563eb;          /* Canlı Mavi */
    --color-accent-light: #3b82f6;    /* Açık Mavi */
    --color-accent-dark: #1d4ed8;     /* Koyu Mavi Accent */
    
    --color-white: #ffffff;
    --color-off-white: #f8fafc;
    --color-light-gray: #f1f5f9;
    --color-gray: #e2e8f0;
    --color-mid-gray: #94a3b8;
    --color-dark-gray: #475569;
    --color-text: #0f172a;
    --color-text-light: #64748b;
    --color-black: #020617;
    
    --color-success: #059669;
    --color-error: #dc2626;
    --color-warning: #d97706;
    
    /* Gölgeler */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
    --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 6px 16px rgba(15, 23, 42, 0.06);
    --shadow-card-hover: 0 4px 12px rgba(15, 23, 42, 0.1), 0 16px 32px rgba(15, 23, 42, 0.1);
    
    /* Tipografi */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Outfit', 'Inter', sans-serif;
    
    /* Geçişler */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Container */
    --container-max: 1200px;
    --container-wide: 1400px;
}

/* ==================== RESET ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-primary);
}

/* ==================== LAYOUT ==================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.container-wide {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-sm {
    padding: 60px 0;
}

/* ==================== HEADER ==================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: background var(--transition-normal), padding var(--transition-normal), box-shadow var(--transition-normal);
    background: transparent;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1001;
}

.logo-icon {
    /* Fallback (for older markup) */
    width: auto;
    height: 50px;
}

img.logo-icon {
    height: 48px; /* Ufak ve dengeli boyut */
    width: auto;
    max-width: 250px;
    object-fit: contain;
}

svg.logo-icon {
    width: 50px;
    height: 50px;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.site-header:not(.scrolled) .logo-text {
    color: var(--color-white);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-dark-gray);
    padding: 8px 18px;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
    background: rgba(37, 99, 235, 0.06);
}

.site-header:not(.scrolled) .nav-link {
    color: var(--color-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5); /* Yazıların arka planda kaybolmasını engeller */
}

.site-header:not(.scrolled) .nav-link:hover,
.site-header:not(.scrolled) .nav-link.active {
    color: var(--color-white);
    background: rgba(0, 0, 0, 0.2);
}

/* CTA Button */
.header-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-primary);
    padding: 10px 28px;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.header-cta:hover {
    background: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.site-header:not(.scrolled) .header-cta {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.site-header:not(.scrolled) .header-cta:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    z-index: 1001;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: all var(--transition-normal);
    border-radius: 2px;
}

.site-header:not(.scrolled) .hamburger span {
    background: var(--color-white);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==================== HERO SLIDER ==================== */
.hero-slider {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background: var(--color-primary);
}

.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease;
}

.slide.active {
    opacity: 1;
}

.slide-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    transition: transform 8s ease;
}

.slide.active .slide-bg {
    transform: scale(1);
}

.slide-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.4), rgba(0, 0, 0, 0.2));
    z-index: 2;
}

.slide-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end !important;
    align-items: flex-start !important;
    text-align: left !important;
    padding: 0 8% 120px 8%;
    z-index: 30;
    color: var(--color-white);
    pointer-events: none; /* Make content transparent to clicks so buildings underneath are clickable */
}

.slide-content > * {
    pointer-events: auto; /* Re-enable clicks for actual text/buttons */
}

.slide-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s 0.3s forwards;
    letter-spacing: -0.5px;
    line-height: 1.15;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.slide.active .slide-title {
    opacity: 1;
    transform: translateY(0);
}

.slide-description {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin-bottom: 40px;
    line-height: 1.8;
    opacity: 0;
    transform: translateY(20px);
}

.slide.active .slide-description {
    animation: slideUp 0.8s 0.5s forwards;
}

.slide-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-accent);
    padding: 16px 36px;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    width: fit-content;
    opacity: 0;
    transform: translateY(20px);
}

.slide.active .slide-btn {
    animation: slideUp 0.8s 0.7s forwards;
}

.slide-btn:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

.slide-btn svg {
    transition: transform var(--transition-fast);
}

.slide-btn:hover svg {
    transform: translateX(4px);
}

/* Slider Navigation */
.slider-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.slider-dot.active {
    background: var(--color-white);
    border-color: var(--color-white);
    transform: scale(1.2);
}

/* ==================== SECTION HEADERS ==================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-label::before,
.section-label::after {
    content: '';
    width: 30px;
    height: 1px;
    background: var(--color-accent);
    opacity: 0.4;
}

.section-title {
    font-size: clamp(2rem, 3vw, 2.8rem);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==================== CARDS ==================== */
.card {
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-primary-light);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
}

.card-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.card-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-accent);
    padding: 4px 14px;
    border-radius: var(--radius-full);
}

.card-body {
    padding: 28px;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 12px;
    transition: color var(--transition-fast);
}

.card:hover .card-title {
    color: var(--color-accent-light);
}

.card-text {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    line-height: 1.7;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--color-mid-gray);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: gap var(--transition-fast);
}

.card-link:hover {
    gap: 10px;
}

/* Service Cards */
.service-card {
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-primary-light);
    position: relative;
    overflow: hidden;
}

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

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

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 1.5rem;
    color: var(--color-accent-light);
    transition: all var(--transition-normal);
}

.service-card:hover .service-icon {
    background: var(--color-accent);
    color: var(--color-white);
}

.service-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--color-white);
}

.service-card p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    line-height: 1.7;
}

.service-features {
    list-style: none !important;
    margin-bottom: 24px;
}

.service-features li {
    list-style: none !important;
    list-style-type: none !important;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent-light);
    opacity: 0.8;
}

/* Product Cards */
.product-card {
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-primary-light);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
}

.product-card-image {
    height: 200px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.product-card-icon {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.9);
}

.product-card-categories {
    position: absolute;
    bottom: 12px;
    left: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    z-index: 5;
}

.product-card-category {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-white);
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.1);
    white-space: nowrap;
}

.product-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 10px;
}

.product-card-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 20px;
}

.product-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

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

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

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

.btn-accent:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

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

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.btn-sm {
    font-size: 0.85rem;
    padding: 8px 20px;
}

.btn-lg {
    font-size: 1.05rem;
    padding: 16px 40px;
}

/* ==================== GRIDS ==================== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* ==================== HOME SECTIONS ==================== */
/* Services Section */
.home-services {
    background: var(--color-off-white);
}

/* About Section */
.home-about {
    background: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.about-content p {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.about-image img {
    width: 100%;
    border-radius: var(--radius-lg);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--color-off-white);
    border-radius: var(--radius-md);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

/* Products Section */
.home-products {
    background: var(--color-off-white);
}

/* Blog Section */
.home-blog {
    background: var(--color-white);
}

/* CTA / Contact Section */
.home-contact {
    background: var(--color-primary);
    color: var(--color-white);
    text-align: center;
}

.home-contact .section-title {
    color: var(--color-white);
}

.home-contact .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

/* ==================== PAGE HERO ==================== */
.page-hero {
    background: var(--color-primary);
    padding: 160px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.08);
}

.page-hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(30, 58, 95, 0.15);
}

.page-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    position: relative;
    z-index: 1;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--color-white);
}

.breadcrumb .separator {
    font-size: 0.7rem;
}

.breadcrumb .current {
    color: var(--color-white);
}

/* ==================== PRODUCTS PAGE ==================== */
.products-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
}

.products-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-gray);
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-dark-gray);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.category-item:hover,
.category-item.active {
    background: var(--color-accent);
    color: var(--color-white);
}

.category-item .count {
    margin-left: auto;
    font-size: 0.8rem;
    background: rgba(0, 0, 0, 0.08);
    padding: 2px 10px;
    border-radius: var(--radius-full);
}

.category-item.active .count,
.category-item:hover .count {
    background: rgba(255, 255, 255, 0.2);
}

/* Products Mobile Layout */
@media (max-width: 991px) {
    .products-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .products-sidebar {
        position: sticky;
        top: 70px; /* Header height + buffer */
        background: var(--color-white);
        margin: -20px -20px 20px -20px;
        padding: 15px 20px;
        z-index: 100;
        border-bottom: 1px solid var(--color-gray);
    }

    .sidebar-title {
        display: none;
    }

    .category-list {
        flex-direction: row;
        overflow-x: auto;
        gap: 10px;
        padding-bottom: 5px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .category-list::-webkit-scrollbar {
        display: none;
    }

    .category-item {
        flex: 0 0 auto;
        padding: 8px 20px;
        border-radius: 50px;
        border: 1px solid var(--color-gray);
        background: var(--color-off-white);
        font-size: 0.85rem;
        white-space: nowrap;
    }

    .category-item.active {
        background: var(--color-accent);
        color: var(--color-white);
        border-color: var(--color-accent);
        box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
    }

    .category-item .count {
        display: none;
    }

    .category-item i, .category-item img {
        font-size: 0.9rem;
    }
}

/* ==================== CONTACT PAGE ==================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-form {
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray);
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-off-white);
    border: 1px solid var(--color-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.form-control:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: var(--color-white);
}

textarea.form-control {
    min-height: 140px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 10.5l-5-5h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-info-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-primary-light);
    transition: all var(--transition-fast);
}

.contact-info-card:hover {
    border-color: var(--color-accent-light);
    box-shadow: var(--shadow-md);
}

.contact-info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    color: var(--color-accent-light);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-info-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 4px;
}

.contact-info-content p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.map-container {
    margin-top: 12px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-gray);
}

.map-container iframe {
    width: 100%;
    height: 300px;
    border: 0;
}

/* ==================== REFERENCES ==================== */
.reference-card {
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--color-primary-light);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.reference-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
}

.reference-logo {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-off-white);
    border-radius: 50%;
    margin-bottom: 20px;
    overflow: hidden;
}

.reference-logo img {
    width: 60%;
    height: 60%;
    object-fit: contain;
}

.reference-logo .initial {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--color-accent);
}

.reference-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 12px;
}

.reference-card p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.reference-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.reference-link:hover {
    gap: 10px;
}

/* ==================== DETAIL PAGES ==================== */
.detail-content {
    max-width: 800px;
    margin: 0 auto;
}

.detail-content h2 {
    font-size: 1.6rem;
    margin-top: 32px;
    margin-bottom: 16px;
}

.detail-content h3 {
    font-size: 1.3rem;
    margin-top: 24px;
    margin-bottom: 12px;
}

.detail-content p {
    margin-bottom: 16px;
    line-height: 1.8;
    color: var(--color-dark-gray);
}

.detail-content ul, .detail-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.detail-content ul {
    list-style: disc;
}

.detail-content ol {
    list-style: decimal;
}

.detail-content li {
    margin-bottom: 8px;
    line-height: 1.7;
    color: var(--color-dark-gray);
}

.detail-image {
    width: 100%;
    border-radius: var(--radius-lg);
    margin: 32px 0;
}

.related-items {
    margin-top: 80px;
    padding-top: 60px;
    border-top: 1px solid var(--color-gray);
}

/* ==================== FOOTER ==================== */
.site-footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.7);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-about .logo-text {
    color: var(--color-white);
    font-size: 1.8rem;
    margin-bottom: 16px;
}

.footer-about p {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-accent);
    color: var(--color-white);
    transform: translateY(-2px);
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.footer-contact-item i {
    color: var(--color-accent);
    margin-top: 4px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ==================== ANIMATIONS ==================== */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Scroll Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }
.animate-on-scroll.delay-3 { transition-delay: 0.3s; }
.animate-on-scroll.delay-4 { transition-delay: 0.4s; }

/* ==================== MISC ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: 40px; }
.mb-4 { margin-bottom: 40px; }
.mt-2 { margin-top: 20px; }
.mb-2 { margin-bottom: 20px; }

/* Alert / Flash Messages */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}

/* Blog detail share */
.share-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--color-gray);
}

.share-buttons span {
    font-weight: 600;
    color: var(--color-primary);
}

.share-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--color-white);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

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

.share-btn.facebook { background: #1877f2; }
.share-btn.twitter { background: #1da1f2; }
.share-btn.linkedin { background: #0077b5; }
.share-btn.whatsapp { background: #25d366; }

/* 404 */
.error-page {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 24px;
}

.error-page h1 {
    font-size: 8rem;
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
}

.error-page h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.error-page p {
    color: var(--color-text-light);
    margin-bottom: 32px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 48px;
}

.page-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-dark-gray);
    background: var(--color-white);
    border: 1px solid var(--color-gray);
    transition: all var(--transition-fast);
}

.page-link:hover,
.page-link.active {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-light);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    opacity: 0.4;
}

.empty-state h3 {
    font-size: 1.2rem;
    color: var(--color-dark-gray);
    margin-bottom: 8px;
}

/* ==================== REFERANSLAR MARQUEE ==================== */
.marquee-wrapper {
    width: 100%;
    overflow: hidden; /* prevents scrollbar */
    position: relative;
    padding: 20px 0;
    margin-top: 30px;
}
.marquee-wrapper::before, .marquee-wrapper::after {
    position: absolute;
    top: 0;
    width: 15%;
    height: 100%;
    content: "";
    z-index: 2;
}
.marquee-wrapper::before {
    left: 0;
    background: linear-gradient(to right, var(--color-off-white) 0%, transparent 100%);
}
.marquee-wrapper::after {
    right: 0;
    background: linear-gradient(to left, var(--color-off-white) 0%, transparent 100%);
}

.marquee {
    display: flex;
    width: max-content;
}

.marquee-content {
    display: flex;
    animation: marquee 30s linear infinite;
}

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

.marquee-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 30px;
    background: white;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin: 0 15px;
    white-space: nowrap;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.marquee-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.marquee-logo {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-off-white);
    overflow: hidden;
    flex-shrink: 0;
}
.marquee-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}
.marquee-logo i {
    font-size: 1.2rem;
    color: var(--color-primary);
}
.marquee-logo span {
    font-weight: 700;
    color: var(--color-primary);
}
.marquee-name {
    font-weight: 600;
    color: var(--color-text);
    font-size: 1.1rem;
}

/* ==================== MOBIL / MASAUSTU VISIBILITY UTILITIES ==================== */
.hide-on-desktop { display: none !important; }
@media (max-width: 768px) {
    .hide-on-mobile { display: none !important; }
    .hide-on-desktop { display: block !important; }
}

/* ==================== FLOATING WHATSAPP ==================== */
.floating-whatsapp {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    align-items: center;
    background: #25D366;
    color: #fff;
    border-radius: 50px;
    padding: 8px 20px 8px 8px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 9999;
    text-decoration: none;
    transition: all 0.3s ease;
    gap: 12px;
}

.floating-whatsapp:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
    color: #fff;
}

.wa-icon {
    width: 40px;
    height: 40px;
    background: #fff;
    color: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    animation: wa-pulse 2s infinite;
}

.wa-text {
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
}

@keyframes wa-pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(255, 255, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}


/* ==================== INTERACTIVE CITY MAP ==================== */
.hero-slider .slide.interactive-slide {
    background: transparent;
}
.interactive-map-container {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.interactive-reference-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}


/* ==================== INTERACTIVE CITY MAP ==================== */
.hero-slider .slide.interactive-slide {
    background: transparent;
}
.interactive-map-container {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.interactive-reference-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.interactive-building {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    z-index: 10;
    background: transparent; /* Görünmez buton */
}
.interactive-building:hover {
    z-index: 20;
}

/* Vektörel SVG Maske Referansları (Masaüstü) */
.building-social { clip-path: url(#mask-social); }
.building-seo { clip-path: url(#mask-seo); }
.building-software { clip-path: url(#mask-software); }

@media (max-width: 768px) {
    /* Vektörel SVG Maske Referansları (Mobil) */
    .building-social.is-mobile { clip-path: url(#mask-social-mobile); }
    .building-seo.is-mobile { clip-path: url(#mask-seo-mobile); }
    .building-software.is-mobile { clip-path: url(#mask-software-mobile); }
}

/* ==================== PREMIUM REALISTIC CLOUD TRANSITION ==================== */
.cloud-transition {
    position: fixed;
    inset: 0;
    z-index: 999999;
    pointer-events: none;
    overflow: hidden;
    display: none;
}
.cloud-transition.active {
    display: block;
}
.cloud-layer {
    position: absolute;
    top: -20%;
    bottom: -20%;
    left: -120%;
    width: 140%;
    background: radial-gradient(circle at 70% 50%, #fff 0%, #f7fbff 40%, rgba(255,255,255,0) 70%);
    opacity: 0;
    transition: transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.4s ease;
    will-change: transform, opacity;
    filter: blur(20px); /* Daha performanslı blur */
}
.cloud-layer-2 { 
    top: -30%; background: radial-gradient(circle at 60% 40%, #ffffff 0%, #edf7ff 50%, rgba(255,255,255,0) 75%); 
    transition-duration: 1.4s; 
}
.cloud-layer-3 { 
    bottom: -30%; background: radial-gradient(circle at 80% 60%, #ffffff 0%, #f0f8ff 40%, rgba(255,255,255,0) 70%); 
    transition-duration: 1.6s; 
}
.cloud-layer-bg { 
    left: -150%; 
    width: 250%; 
    background: #ffffff; 
    border-radius: 0; 
    filter: none; 
    opacity: 0;
    transition: transform 1s cubic-bezier(0.645, 0.045, 0.355, 1), opacity 0.3s ease;
}

.cloud-transition.active .cloud-layer {
    opacity: 1;
    transform: translate3d(200%, 0, 0);
}
.cloud-transition.active .cloud-layer-bg {
    opacity: 1;
    transform: translate3d(150%, 0, 0);
}