/* Mergen Technologies - Tancan tabanlı stil (icsteknoloji.com benzeri) */
/* Site genelinde Inter fontu - Bootstrap ve tüm bileşenler dahil */
:root {
    --bs-body-font-family: 'Inter', sans-serif;
    --bs-font-sans-serif: 'Inter', sans-serif;
}

html {
    font-family: 'Inter', sans-serif;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: box-shadow 0.3s ease;
}

/* ICS tarzı: üst koyu bar (iletişim) */
.header-ics .header-top {
    background: #1a202c;
    color: #e2e8f0;
    font-size: 0.85rem;
    padding: 0.5rem 0;
}

.header-top-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.header-brand {
    text-decoration: none;
    color: #fff;
    font-weight: 700;
    font-size: 1.25rem;
}

.header-brand .logo-text {
    color: #fff;
    font-size: 1.25rem;
}

.header-brand .logo-img {
    height: 36px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.header-info {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
}

.header-info-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.header-info-item i {
    font-size: 0.8rem;
    opacity: 0.9;
}

.header-info-link {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.2s;
}

.header-info-link:hover {
    color: #fff;
}

.header-info-address {
    color: #a0aec0;
}

.header-top-right {
    display: flex;
    align-items: center;
}

.header-top-right .language-selector {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
}

.header-top-right .lang-btn {
    color: #e2e8f0;
}

.header-top-right .lang-btn.active {
    background: #fff;
    color: #1a202c;
}

.header-top-right .lang-btn:hover:not(.active) {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

/* Alt menü çubuğu (beyaz) */
.header-ics .header-nav {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    padding: 0.6rem 0;
}

.header-ics .header-nav .nav-container {
    justify-content: center;
}

.header-ics .nav-menu {
    gap: 0.5rem 2rem;
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-logo h2,
.nav-logo .logo-text {
    color: #1a365d;
    font-weight: 700;
    font-size: 1.8rem;
}

.nav-logo .logo-img {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover {
    color: #1a365d;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 1rem 0;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 0.5rem 1.5rem;
    color: #333;
    text-decoration: none;
    transition: background 0.3s ease;
}

.dropdown-menu li a:hover {
    background: #f7fafc;
    color: #1a365d;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.language-selector {
    display: flex;
    background: #f8fafc;
    border-radius: 25px;
    padding: 4px;
    border: 1px solid #e2e8f0;
}

.lang-btn {
    background: transparent;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    color: #64748b;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 40px;
}

.lang-btn.active {
    background: #1a365d;
    color: white;
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.3);
}

.lang-btn:hover:not(.active) {
    background: #e2e8f0;
    color: #475569;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero, sections, cards, footer - full set from tancan */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

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

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #f7fafc;
    color: #1a365d;
}

.btn-primary:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #1a365d;
    transform: translateY(-2px);
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a365d;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.services {
    padding: 80px 15px;
    background: #f8fafc;
}

.services-top,
.services-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    justify-content: center;
}

.services-bottom {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    justify-content: center;
}

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-icon i {
    font-size: 2rem;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a365d;
    margin-bottom: 1rem;
}

.service-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-link {
    color: #1a365d;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s ease;
}

.service-link:hover {
    gap: 1rem;
}

.benefits {
    padding: 80px 0;
    background: white;
}

.benefits-top,
.benefits-bottom {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    justify-content: center;
}

.benefits-grid {
    margin-top: 2rem;
}

.benefit-card {
    text-align: center;
    padding: 2rem;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-5px);
}

.benefit-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.benefit-icon i {
    font-size: 1.8rem;
    color: white;
}

.benefit-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a365d;
    margin-bottom: 1rem;
}

.benefit-card p {
    color: #666;
    line-height: 1.6;
}

.references {
    padding: 80px 0;
    background: #f8fafc;
}

.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    align-items: center;
}

.reference-item {
    text-align: center;
}

.reference-item img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.reference-item:hover img {
    transform: scale(1.05);
}

.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.footer {
    background: #1a202c;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: #f7fafc;
    margin-bottom: 1rem;
    font-weight: 600;
}

.footer-section p {
    color: #a0aec0;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #f7fafc;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #2d3748;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #667eea;
    transform: translateY(-2px);
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.contact-info i {
    color: #667eea;
    width: 20px;
}

.footer-bottom {
    border-top: 1px solid #2d3748;
    padding-top: 2rem;
    text-align: center;
    color: #a0aec0;
}

.footer-logo .footer-logo-img {
    height: 40px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

/* Page header (iç sayfalar) */
.page-header {
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
    text-align: center;
    padding: 120px 0 80px;
    margin-top: 70px;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* ICS header: ilk bölüm üst boşluk (çift sıra header) */
.header-ics ~ main .hero,
.header-ics ~ main .home-banner {
    padding-top: 140px;
}

.header-ics ~ main .page-header {
    margin-top: 0;
    padding-top: 140px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-top-inner {
        justify-content: space-between;
    }
    .header-info .header-info-item:nth-child(n+2),
    .header-info .header-info-link,
    .header-info .header-info-address {
        display: none;
    }
    .header-ics .header-nav .nav-container {
        justify-content: space-between;
    }
    .hamburger {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 120px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        z-index: 999;
    }
    .nav-menu.active {
        left: 0;
        top: 120px;
    }
    .nav-menu .nav-item {
        margin: 0.5rem 0;
    }
    .nav-menu .nav-link {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #f8fafc;
        margin: 0.5rem 1rem;
        border-radius: 8px;
        max-height: 0;
        overflow: hidden;
        transition: all 0.3s ease;
        padding: 0;
        border: 1px solid #e2e8f0;
    }
    .dropdown.active .dropdown-menu {
        max-height: 500px;
        padding: 0.5rem 0;
    }
    .dropdown-menu li a {
        padding: 0.75rem 2rem;
    }
    .nav-logo .logo-img {
        height: 40px;
    }
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
    .section-header h2 {
        font-size: 2rem;
    }
    .services-top,
    .services-bottom,
    .benefits-top,
    .benefits-bottom {
        grid-template-columns: 1fr;
    }
    .references-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.75rem;
    }
    .section-header h2 {
        font-size: 1.8rem;
    }
}

html {
    scroll-behavior: smooth;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #1a365d;
    border-radius: 4px;
}

/* About page */
.about-content { padding: 80px 0; background: white; }
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.about-text h2 { font-size: 2.5rem; font-weight: 700; color: #1a365d; margin-bottom: 1.5rem; }
.about-text p { font-size: 1.1rem; color: #666; margin-bottom: 1.5rem; line-height: 1.6; }
.about-image img { width: 100%; height: auto; border-radius: 12px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }

/* Contact */
.contact-info-section { padding: 80px 0; background: #f8fafc; }
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}
.contact-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    border: 1px solid #e2e8f0;
}
.contact-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}
.contact-icon i { font-size: 1.8rem; color: white; }
.contact-card h3 { font-size: 1.3rem; font-weight: 600; color: #1a365d; margin-bottom: 1rem; }
.contact-details p { color: #666; margin-bottom: 0.5rem; }

.contact-form-section { padding: 80px 0; background: white; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; color: #1a365d; }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
}

/* ---- Ana sayfa ICS tarzı bölümler ---- */
.home-banner {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
    text-align: center;
}

.home-banner h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.home-banner .lead {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto 2rem;
}

/* Hizmet alanları 4’lü kart grid (ICS ana sayfa) */
.home-services-hero {
    padding: 4rem 0;
    background: #f8fafc;
}

.home-services-hero .section-header {
    margin-bottom: 2rem;
}

.home-services-hero .section-header h2 {
    font-size: 2rem;
}

.home-services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.home-service-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
}

.home-service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.home-service-card .card-head {
    padding: 2rem 1.5rem;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

.home-service-card .card-head h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #1a365d;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.home-service-card .card-head p {
    font-size: 0.9rem;
    color: #64748b;
    margin: 0;
    line-height: 1.4;
}

.home-service-card .card-foot {
    padding: 1rem 1.5rem;
    background: #f8fafc;
    text-align: center;
}

.home-service-card .card-foot a {
    color: #1a365d;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
}

.home-service-card .card-foot a:hover {
    text-decoration: underline;
}

/* Biz Kimiz bloğu */
.home-about {
    padding: 4rem 0;
    background: #fff;
}

.home-about .about-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.home-about h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #1a365d;
    margin-bottom: 1rem;
}

.home-about .about-inner p {
    color: #475569;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.home-about .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}

/* Hizmetlerimiz Neler yaparız - 6’lı kart */
.home-services-list {
    padding: 4rem 0;
    background: #f8fafc;
}

.home-services-list .services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.home-service-item {
    background: #fff;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #e2e8f0;
    transition: transform 0.2s ease;
}

.home-service-item:hover {
    transform: translateY(-2px);
}

.home-service-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1a365d;
    margin-bottom: 0.75rem;
}

.home-service-item p {
    font-size: 0.9rem;
    color: #64748b;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.home-service-item a {
    color: #667eea;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
}

.home-service-item a:hover {
    text-decoration: underline;
}

/* CTA kontrol sizde */
.home-cta {
    padding: 4rem 0;
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
    text-align: center;
}

.home-cta h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.home-cta p {
    font-size: 1.05rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto 1.5rem;
}

/* Blog / Yenilikler */
.home-blog {
    padding: 4rem 0;
    background: #fff;
}

.home-blog .blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.home-blog-item {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: transform 0.2s ease;
}

.home-blog-item:hover {
    transform: translateY(-2px);
}

.home-blog-item h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1a365d;
    margin-bottom: 0.5rem;
}

.home-blog-item a {
    color: #667eea;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
}

.home-blog-item a:hover {
    text-decoration: underline;
}

/* İş Ortaklıklarımız */
.home-partners {
    padding: 4rem 0;
    background: #f8fafc;
}

.home-partners .partners-inner {
    text-align: center;
    margin-top: 2rem;
}

.home-partners .section-header h2 {
    font-size: 2rem;
}

@media (max-width: 992px) {
    .home-services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .home-services-list .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .home-about .about-inner {
        grid-template-columns: 1fr;
    }
    .home-blog .blog-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .home-banner { padding-top: 120px; }
    .home-services-grid {
        grid-template-columns: 1fr;
    }
    .home-services-list .services-grid {
        grid-template-columns: 1fr;
    }
    .home-blog .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* Scroll to top button */
.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: #1a365d;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.scroll-to-top:hover {
    background: #2d3748;
    transform: translateY(-2px);
}