/* =============================================
   Telnova Mühendislik - Ana Stil Dosyası
   Renk Paleti: Mavi Tonları
   ============================================= */

/* === GENEL DEĞİŞKENLER === */
:root {
    --primary: #1a56db;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #0f172a;
    --accent: #60a5fa;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --gradient-primary: linear-gradient(135deg, #1a56db 0%, #3b82f6 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

/* === GENEL STILLER === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
    background-color: var(--bg-white);
}

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

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

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

section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    position: relative;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

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

/* === BUTON STİLLERİ === */
.btn-primary-custom {
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.3px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary-custom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

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

.btn-primary-custom:hover::before {
    opacity: 1;
}

.btn-outline-custom {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
    padding: 12px 34px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-outline-custom:hover {
    background: #fff;
    color: var(--primary);
    border-color: #fff;
    transform: translateY(-2px);
}

/* === NAVBAR === */
.navbar-custom {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar-custom.scrolled {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: var(--shadow-sm);
}

.navbar-custom .navbar-brand {
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.5px;
}

.navbar-custom.scrolled .navbar-brand {
    color: var(--secondary);
}

.navbar-brand span {
    color: var(--accent);
}

.navbar-custom.scrolled .navbar-brand span {
    color: var(--primary);
}

.navbar-custom .nav-link {
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 20px !important;
    position: relative;
    transition: var(--transition);
}

.navbar-custom .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: var(--transition);
}

.navbar-custom .nav-link:hover::after,
.navbar-custom .nav-link.active::after {
    transform: scaleX(1);
}

.navbar-custom .nav-link:hover {
    color: #fff;
}

.navbar-custom.scrolled .nav-link {
    color: var(--text-dark);
}

.navbar-custom.scrolled .nav-link:hover {
    color: var(--primary);
}

.navbar-custom.scrolled .nav-link::after {
    background: var(--primary);
}

.navbar-toggler {
    border: none;
    padding: 0;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.hamburger-icon {
    width: 28px;
    height: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hamburger-icon span {
    display: block;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

.navbar-custom.scrolled .hamburger-icon span {
    background: var(--secondary);
}

/* === HERO BÖLÜMÜ === */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-dark);
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(59,130,246,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(96,165,250,0.1) 0%, transparent 50%),
        radial-gradient(circle at 60% 80%, rgba(26,86,219,0.1) 0%, transparent 50%);
    z-index: 1;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.hero-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(96,165,250,0.3);
    border-radius: 50%;
    animation: float-particle 15s infinite linear;
}

.hero-particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; animation-duration: 12s; }
.hero-particle:nth-child(2) { left: 20%; top: 60%; animation-delay: 2s; animation-duration: 18s; }
.hero-particle:nth-child(3) { left: 40%; top: 30%; animation-delay: 4s; animation-duration: 14s; }
.hero-particle:nth-child(4) { left: 60%; top: 70%; animation-delay: 1s; animation-duration: 16s; }
.hero-particle:nth-child(5) { left: 80%; top: 40%; animation-delay: 3s; animation-duration: 20s; }
.hero-particle:nth-child(6) { left: 90%; top: 80%; animation-delay: 5s; animation-duration: 13s; }
.hero-particle:nth-child(7) { left: 50%; top: 10%; animation-delay: 6s; animation-duration: 17s; }
.hero-particle:nth-child(8) { left: 30%; top: 90%; animation-delay: 7s; animation-duration: 15s; }

@keyframes float-particle {
    0% { transform: translateY(0) translateX(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100vh) translateX(50px); opacity: 0; }
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59,130,246,0.15);
    border: 1px solid rgba(59,130,246,0.3);
    border-radius: 50px;
    padding: 8px 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #60a5fa, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.7);
    max-width: 540px;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

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

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.hero-stat-item h3 {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 4px;
}

.hero-stat-item p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

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

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

.hero-image-wrapper::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--primary), var(--accent), var(--primary-dark));
    border-radius: var(--radius-lg);
    z-index: -1;
}

.hero-image-placeholder {
    width: 100%;
    height: 450px;
    background: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(15,23,42,0.8));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: rgba(96,165,250,0.4);
}

/* === SCROLL INDICATOR === */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.4);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-indicator .mouse {
    width: 24px;
    height: 38px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator .mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: rgba(255,255,255,0.5);
    border-radius: 3px;
    animation: scroll-mouse 2s infinite;
}

@keyframes scroll-mouse {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* === DEĞERLER BÖLÜMÜ === */
.values-section {
    background: var(--bg-light);
    padding: 100px 0;
}

.value-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

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

.value-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(26,86,219,0.1), rgba(59,130,246,0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--primary);
    transition: var(--transition);
}

.value-card:hover .value-icon {
    background: var(--gradient-primary);
    color: #fff;
    transform: scale(1.1);
}

.value-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.value-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* === HAKKIMIZDA BÖLÜMÜ === */
.about-section {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.about-image-placeholder {
    width: 100%;
    height: 450px;
    background: linear-gradient(135deg, #e0e7ff, #dbeafe);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary-light);
}

.about-floating-card {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--bg-white);
    padding: 24px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 16px;
}

.about-floating-card .icon-box {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.3rem;
}

.about-floating-card .text h5 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0;
}

.about-floating-card .text p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

.about-content {
    padding-left: 2rem;
}

.about-content .section-title {
    text-align: left;
}

.about-content p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

.about-features {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
}

.about-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-weight: 500;
    color: var(--text-dark);
}

.about-features li i {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(26,86,219,0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* === HİZMETLER BÖLÜMÜ === */
.services-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.service-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 0;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    overflow: hidden;
    height: 100%;
}

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

.service-card-img {
    height: 200px;
    background: linear-gradient(135deg, #dbeafe, #e0e7ff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--primary);
    position: relative;
    overflow: hidden;
}

.service-card-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 30px;
    background: linear-gradient(transparent, var(--bg-white));
}

.service-card-body {
    padding: 28px;
}

.service-card-body h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.service-card-body p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

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

.service-link:hover {
    gap: 10px;
    color: var(--primary-dark);
}

/* === ÇALIŞMA MODELİ === */
.workflow-section {
    padding: 100px 0;
    background: var(--bg-white);
    position: relative;
}

.workflow-step {
    text-align: center;
    position: relative;
    padding: 0 15px;
}

.workflow-step-number {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 auto 1.5rem;
    position: relative;
    z-index: 2;
    box-shadow: 0 8px 25px rgba(26,86,219,0.3);
}

.workflow-step h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

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

.workflow-connector {
    position: absolute;
    top: 35px;
    left: calc(50% + 50px);
    width: calc(100% - 100px);
    height: 2px;
    background: repeating-linear-gradient(
        90deg,
        var(--primary-light) 0px,
        var(--primary-light) 8px,
        transparent 8px,
        transparent 16px
    );
    opacity: 0.3;
}

/* === MÜŞTERİLER / MARKALAR === */
.brands-section {
    padding: 60px 0;
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.brand-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0.4;
    transition: var(--transition);
    filter: grayscale(100%);
}

.brand-item:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* === CTA / BÜLTEN BÖLÜMÜ === */
.cta-section {
    padding: 100px 0;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 30% 50%, rgba(59,130,246,0.15), transparent 60%),
        radial-gradient(circle at 70% 30%, rgba(96,165,250,0.1), transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-section .section-title {
    color: #fff;
}

.cta-section .section-subtitle {
    color: rgba(255,255,255,0.6);
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    gap: 12px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 50px;
    padding: 6px;
    backdrop-filter: blur(10px);
}

.newsletter-form input {
    flex: 1;
    background: transparent;
    border: none;
    color: #fff;
    padding: 12px 20px;
    font-size: 0.95rem;
    outline: none;
}

.newsletter-form input::placeholder {
    color: rgba(255,255,255,0.4);
}

.newsletter-form button {
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.newsletter-form button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(26,86,219,0.4);
}

/* === İLETİŞİM BÖLÜMÜ === */
.contact-section {
    padding: 100px 0;
    background: var(--bg-white);
}

.contact-info-card {
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 30px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    height: 100%;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.contact-info-card .icon-box {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-info-card h5 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.contact-info-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.contact-form {
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 40px;
    border: 1px solid var(--border-color);
}

.contact-form .form-control {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--bg-white);
}

.contact-form .form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26,86,219,0.1);
}

.contact-form textarea.form-control {
    min-height: 130px;
    resize: vertical;
}

/* === FOOTER === */
.footer {
    background: var(--secondary);
    color: rgba(255,255,255,0.7);
    padding: 80px 0 0;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 1rem;
    display: block;
}

.footer-brand span {
    color: var(--accent);
}

.footer-description {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

.footer h5 {
    color: #fff;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.footer-links a:hover {
    color: #fff;
    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(--accent);
    margin-top: 4px;
    font-size: 0.85rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 24px 0;
    margin-top: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    margin-bottom: 0;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

/* === SAYFA BAŞI BUTONU === */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
}

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

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

/* === PRELOADER === */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.loaded {
    opacity: 0;
    visibility: hidden;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(59,130,246,0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* === RESPONSIVE === */
@media (max-width: 991.98px) {
    .hero-title {
        font-size: 2.8rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .hero-visual {
        margin-top: 3rem;
    }

    .section-title {
        font-size: 2rem;
    }

    section {
        padding: 70px 0;
    }

    .about-content {
        padding-left: 0;
        margin-top: 3rem;
    }

    .navbar-collapse {
        background: rgba(15,23,42,0.98);
        backdrop-filter: blur(20px);
        border-radius: var(--radius-md);
        padding: 20px;
        margin-top: 10px;
    }

    .navbar-custom.scrolled .navbar-collapse {
        background: rgba(255,255,255,0.98);
    }

    .workflow-connector {
        display: none;
    }

    .workflow-step {
        margin-bottom: 2rem;
    }

    .about-floating-card {
        position: relative;
        bottom: auto;
        right: auto;
        margin-top: 1rem;
    }
}

@media (max-width: 767.98px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .hero-stat-item {
        flex: 0 0 calc(50% - 10px);
    }

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

    .hero-buttons .btn-primary-custom,
    .hero-buttons .btn-outline-custom {
        text-align: center;
        justify-content: center;
    }

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

    .newsletter-form {
        flex-direction: column;
        border-radius: var(--radius-md);
    }

    .newsletter-form button {
        width: 100%;
    }

    .footer-bottom {
        text-align: center;
        justify-content: center;
    }
}

@media (max-width: 575.98px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    section {
        padding: 50px 0;
    }

    .contact-form {
        padding: 25px;
    }
}

/* === LOGO === */
.navbar-logo {
    height: 42px;
    transition: var(--transition);
    filter: brightness(0) invert(1);
}

.navbar-custom.scrolled .navbar-logo {
    filter: none;
    height: 38px;
}

/* === DROPDOWN MENÜ === */
.navbar-custom .dropdown-menu {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    min-width: 260px;
    animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.navbar-custom .dropdown-item {
    border-radius: 6px;
    padding: 10px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
}

.navbar-custom .dropdown-item:hover {
    background: rgba(26,86,219,0.08);
    color: var(--primary);
}

.navbar-custom .dropdown-item i {
    width: 20px;
    color: var(--primary-light);
}

/* === ÜRÜN SAYFALARI === */
.page-hero {
    background: var(--gradient-dark);
    padding: 160px 0 80px;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(59,130,246,0.15), transparent 60%);
}

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

.page-hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 1rem;
}

.page-hero p {
    color: rgba(255,255,255,0.7);
    font-size: 1.15rem;
    max-width: 700px;
}

.breadcrumb-custom {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.breadcrumb-custom a {
    color: rgba(255,255,255,0.5);
}

.breadcrumb-custom a:hover {
    color: #fff;
}

.breadcrumb-custom span {
    color: var(--accent);
}

.breadcrumb-custom .separator {
    color: rgba(255,255,255,0.3);
}

/* Ürün Kategorileri Grid */
.product-categories {
    padding: 80px 0;
    background: var(--bg-light);
}

.category-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    height: 100%;
}

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

.category-card-img {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    position: relative;
    overflow: hidden;
}

.category-card-body {
    padding: 24px;
}

.category-card-body h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.category-card-body p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Ürün Detay */
.product-section {
    padding: 80px 0;
}

.product-section:nth-child(even) {
    background: var(--bg-light);
}

.product-group-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--secondary);
}

.product-group-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 2rem;
    max-width: 700px;
}

.product-item {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    height: 100%;
}

.product-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.product-item-img {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    position: relative;
}

.product-item-body {
    padding: 24px;
}

.product-item-body h5 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.product-item-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.product-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 6px;
    margin-bottom: 6px;
}

.product-badge-primary {
    background: rgba(26,86,219,0.1);
    color: var(--primary);
}

.product-badge-success {
    background: rgba(16,185,129,0.1);
    color: #10b981;
}

.product-badge-warning {
    background: rgba(245,158,11,0.1);
    color: #f59e0b;
}

.product-badge-danger {
    background: rgba(239,68,68,0.1);
    color: #ef4444;
}

.product-features {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.product-features li {
    padding: 6px 0;
    font-size: 0.88rem;
    color: var(--text-dark);
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.product-features li i {
    color: var(--primary);
    margin-top: 4px;
    font-size: 0.7rem;
}

.product-spec-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.85rem;
}

.product-spec-table th {
    background: var(--bg-light);
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
    border-bottom: 2px solid var(--border-color);
}

.product-spec-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
}

.product-spec-table tr:hover td {
    background: rgba(26,86,219,0.02);
}

/* CTA Banner */
.catalog-cta {
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin: 40px 0;
}

.catalog-cta h3 {
    color: #fff;
    font-size: 1.4rem;
    margin-bottom: 0.25rem;
}

.catalog-cta p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 0;
    font-size: 0.95rem;
}

.catalog-cta .btn {
    background: #fff;
    color: var(--primary);
    border: none;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

/* Diğer Kategoriler */
.other-categories {
    padding: 60px 0;
    background: var(--bg-light);
}

.mini-category-card {
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: block;
}

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

.mini-category-card i {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 10px;
    display: block;
}

.mini-category-card span {
    font-weight: 600;
    font-size: 0.85rem;
}

@media (max-width: 767.98px) {
    .page-hero h1 {
        font-size: 2rem;
    }
    .catalog-cta {
        padding: 24px;
        flex-direction: column;
        text-align: center;
    }
    .product-group-title {
        font-size: 1.4rem;
    }
}