/* GENEL STİLLER VE MODERNLEŞTİRME */
:root {
    --main-black: #101010;
    --main-red: #E60000;
    --light-red: #ff4d4d;
    --white: #f5f5f5;
    --grey: #A9A9A9;
    --light-grey: #d9d9d9;
    --border-color: rgba(255, 255, 255, 0.1);
    --transition-speed: 0.4s;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Open Sans', sans-serif;
    background-color: var(--main-black);
    color: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Modern Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--main-black); }
::-webkit-scrollbar-thumb { background: var(--main-red); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--light-red); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3, h4 { font-family: 'Montserrat', sans-serif; font-weight: 700; }
.text-center { text-align: center; margin-top: 3rem; }

/* --- NAVBAR --- */
.navbar {
    background-color: rgba(16, 16, 16, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 0.3rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(16, 16, 16, 0.95);
    padding: 0.2rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.navbar .logo {
    flex-shrink: 0;
    margin-right: 2rem;
}

.navbar .logo img {
    height: 50px;
    width: auto;
    max-width: 180px;
    display: block;
    transition: all 0.3s ease;
}

.navbar.scrolled .logo img {
    max-height: 60px;
}

.navbar .nav-links {
    list-style: none;
    display: flex;

    padding: 5px;
    border-radius: 50px;
}
/* Menü aktif olunca görünür ve yumuşak animasyon */
.navbar .nav-links.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: var(--main-black);
  padding: 1rem 0;
  border-radius: 0;
  animation: slideDown 0.3s ease forwards;
}

@keyframes slideDown {
  from {opacity: 0; transform: translateY(-10px);}
  to {opacity: 1; transform: translateY(0);}
}


.navbar .nav-links li {
    margin: 0;
}

.navbar .nav-links a {
    color: var(--light-grey); 
    text-decoration: none;
    font-weight: 600;
    padding: 10px 25px;
    border-radius: 30px;
    transition: all 0.4s ease;
    position: relative;
    z-index: 2;
}

.navbar .nav-links a:hover,
.navbar .nav-links a.active {
    color: var(--white);
    background-color: var(--main-red);
}

.navbar .cta-button {
    background-color: var(--main-red);
    color: var(--white);
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: all var(--transition-speed) ease;
    box-shadow: 0 0 15px rgba(230, 0, 0, 0.4);
}
.navbar .cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 25px rgba(230, 0, 0, 0.7);
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.menu-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: var(--white);
    margin: 3px 0;
    transition: all 0.3s ease;
}
.hero { 
    height: 100vh; 
    position: relative; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    text-align: center; 
    color: var(--white); 

    background-image: url('arkaplank.jpg'); /* Görsel yolu */
    background-size: cover;               /* Ekrana tam oturtur */
    background-position: center;          /* Ortalar */
    background-repeat: no-repeat;         /* Tekrar etmez */
}

/* HERO BÖLÜMÜ */
.herohakkimizda { 
    height: 100vh; 
    position: relative; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    text-align: center; 
    color: var(--white); 

    background-image: url('logohakkimizda.jpg'); /* Görsel yolu */
    background-size: cover;               /* Ekrana tam oturtur */
    background-position: center;          /* Ortalar */
    background-repeat: no-repeat;         /* Tekrar etmez */
}


.hero-video { 
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    z-index: -2; 
}
.hero-overlay { 
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background: linear-gradient(to top, rgba(16, 16, 16, 0.9), rgba(0, 0, 0, 0.6)); 
    z-index: -1; 
}
.hero-content h1 { 
    font-size: clamp(2.5rem, 5vw, 4rem); 
    margin-bottom: 1rem; 
    letter-spacing: 2px; 
    text-shadow: 0 0 20px rgba(0,0,0,0.7); 
    line-height: 1.2;
}
.hero-content p { 
    font-size: clamp(1rem, 2.5vw, 1.2rem); 
    max-width: 600px; 
    margin: 0 auto 2rem auto; 
    font-weight: 600; 
}
.btn { 
    padding: 0.9rem 2.2rem; 
    text-decoration: none; 
    border-radius: 5px; 
    font-weight: bold; 
    margin: 0 0.5rem; 
    transition: all var(--transition-speed) ease; 
    display: inline-block;
}
.btn-primary { 
    background-color: var(--main-red); 
    color: var(--white); 
}
.btn-primary:hover { 
    background-color: #c00000; 
    transform: translateY(-3px); 
}
.btn-secondary { 
    background-color: transparent; 
    color: var(--white); 
    border: 2px solid var(--main-red); 
}
.btn-secondary:hover { 
    background-color: var(--main-red); 
    transform: translateY(-3px); 
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid var(--white);
    border-radius: 15px;
    display: flex;
    justify-content: center;
}

.scroll-indicator span {
    display: block;
    width: 5px;
    height: 10px;
    background: var(--main-red);
    border-radius: 5px;
    margin-top: 10px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(20px); }
}

/* GİRİŞ ANİMASYONLARI */
.fade-in { animation: fadeIn 1s ease-out forwards; }
.delay-1 { animation-delay: 0.3s; }
.delay-2 { animation-delay: 0.6s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.section-animated { opacity: 0; transform: translateY(50px); transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.section-animated.is-visible { opacity: 1; transform: translateY(0); }

/* SERVICES BÖLÜMÜ */
.services {
    padding: 6rem 0;
}

.services-grid {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    flex: 1;
    position: relative;
    overflow: hidden;
    height: 350px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    background-size: cover;
    background-position: center;
}
.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
/* Kartlara özel arka plan görselleri */
#card-design { background-image: url('https://via.placeholder.com/400x500.png/111/fff?text=Tasarım+ve+Çizim'); }
#card-production { background-image: url('https://via.placeholder.com/400x500.png/111/fff?text=Üretim+ve+CNC'); }
#card-assembly { background-image: url('https://via.placeholder.com/400x500.png/111/fff?text=Montaj+ve+Vinç'); }

.card-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to top, rgba(16, 16, 16, 1) 20%, rgba(16, 16, 16, 0.2) 100%);
    transition: background var(--transition-speed) ease;
}
.service-card:hover .card-overlay {
    background: linear-gradient(to top, rgba(16, 16, 16, 0.9) 10%, rgba(16, 16, 16, 0.1) 100%);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--main-red);
    margin-bottom: 1rem;
}

.card-content {
    padding: 2rem;
    position: relative;
    z-index: 2;
    transform: translateY(20px);
    transition: transform var(--transition-speed) ease;
}
.service-card:hover .card-content {
    transform: translateY(0);
}
.card-content h3 {
    color: var(--main-red);
    margin-bottom: 0.5rem;
}
.card-content p {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.card-link {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.card-link:hover {
    color: var(--main-red);
    gap: 0.8rem;
}

/* NEDEN HAFİF ÇELİK BÖLÜMÜ */
/* NEDEN HAFİF ÇELİK BÖLÜMÜ */
.why-steel { padding: 6rem 0; }

/* YENİ EKLENDİ: Başlıkları ortalamak için */
.section-header {
    text-align: center;
    margin-bottom: 3rem; /* Başlıklarla grid arasına boşluk ekler */
}

/* SEÇİCİ DEĞİŞTİ: .why-steel-content h2 -> .section-header h2 */
.section-header h2 { 
    color: var(--main-red); 
    font-size: 1.5rem; 
    text-transform: uppercase; /* 'fullsize' yerine 'uppercase' kullanıldı */
    letter-spacing: 6px; 
    margin-bottom: 0.5rem;
}

/* SEÇİCİ DEĞİŞTİ: .why-steel-content h3 -> .section-header h3 */
.section-header h3 { 
    font-size: 2.9rem; 
    color: var(--main-white); 
    margin-bottom: 6rem; /* Buradaki margin-bottom'u azaltabilirsiniz */
    line-height: 1.3;
}


.grid-2 { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 4rem; 
    align-items: center; 
}
.why-steel-image img { 
    width: 100%; 
    height: auto; 
    border-radius: 10px; 

}

.why-steel-content ul {
  margin: 1.5rem auto 2rem;
  text-align: left;
  max-width: 720px;
}
.why-steel-content li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin: 0;
}
.why-steel-content li i {
  color: var(--main-red);
  min-width: 22px;
  margin-top: 4px;
  font-size: 1.05rem;
}
.why-steel-content li .text {
  display: grid;
  gap: 0.2rem;
}
.why-steel-content li strong {
  color: var(--white);
  font-weight: 700;
  line-height: 1.3;
}
.why-steel-content li span {
  color: var(--grey);
  line-height: 1.6;
  font-size: 1rem;
}
/* PROJELER BÖLÜMÜ */
.projects { padding: 6rem 0; }
.section-title { 
    font-size: 2.5rem; 
    text-align: center; 
    margin-bottom: 1rem; 
    color: var(--white); 
    position: relative; 
    padding-bottom: 1rem; 
}
.section-title::after { 
    content: ''; 
    position: absolute; 
    bottom: 0; 
    left: 50%; 
    transform: translateX(-50%); 
    width: 80px; 
    height: 3px; 
    background-color: var(--main-red); 
}
.section-subtitle { 
    text-align: center; 
    color: var(--grey); 
    margin-bottom: 3rem; 
    max-width: 600px; 
    margin-left: auto; 
    margin-right: auto; 
}

.project-filter {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
    gap: 1rem;
}

.filter-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--grey);
    padding: 0.5rem 1.5rem;
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--main-red);
    color: var(--white);
    border-color: var(--main-red);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.project-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    height: 250px;
}

.project-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-item:hover img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(16, 16, 16, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.5s ease;
    padding: 2rem;
}

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

.project-overlay h3 {
    color: var(--white);
    margin-bottom: 0.5rem;
    text-align: center;
}

.project-overlay p {
    color: var(--main-red);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.project-link {
    color: var(--white);
    text-decoration: none;
    padding: 0.5rem 1.5rem;
    border: 2px solid var(--main-red);
    border-radius: 30px;
    transition: all 0.3s ease;
}

.project-link:hover {
    background: var(--main-red);
}

/* SÜREÇ BÖLÜMÜ */
.process { padding: 6rem 0; }
.process-timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 3rem;
}

.process-timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: var(--main-red);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
    border-radius: 10px;
}

.process-step {
    position: relative;
    width: 50%;
    margin-bottom: 4rem;
    padding: 10px 40px;
}

.process-step:nth-child(odd) {
    left: 0;
}

.process-step:nth-child(even) {
    left: 50%;
}

.process-icon {
    position: absolute;
    width: 60px;
    height: 60px;
    right: -30px;
    background-color: var(--main-black);
    border: 4px solid var(--main-red);
    border-radius: 50%;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    color: var(--white);
}

.process-step:nth-child(even) .process-icon {
    left: -30px;
}

.process-content {
    padding: 20px 30px;
    background-color: rgba(40, 40, 40, 0.5);
    border-radius: 10px;
    border-left: 4px solid var(--main-red);
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.process-step:nth-child(even) .process-content {
    border-left: none;
    border-right: 4px solid var(--main-red);
}

.process-content h3 {
    color: var(--main-red);
    margin-bottom: 0.5rem;
}

/* KALİTE BÖLÜMÜ */
.quality {
    padding: 6rem 0;
    position: relative;
}

.quality-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(16, 16, 16, 0.9), rgba(16, 16, 16, 0.9)), url('https://via.placeholder.com/1920x1080.png/111/fff?text=Kalite+ve+Teknoloji') center/cover no-repeat;
    z-index: -1;
}

.quality-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.quality-features {
    margin-top: 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    background-color: rgba(40, 40, 40, 0.5);
    padding: 1.2rem;
    border-radius: 8px;
    border-left: 4px solid var(--main-red);
}

.feature-item i {
    color: var(--main-red);
    font-size: 1.2rem;
    margin-right: 1rem;
}



/* PARALLAX GÖRSELLİ BÖLÜM */
.parallax-showcase {
    height: 60vh;
    background: url('https://via.placeholder.com/1920x1080.png/111/fff?text=Modern+Çelik+Yapı+Örneği') fixed center/cover no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.parallax-showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(16, 16, 16, 0.7);
}

.parallax-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
}

.parallax-content h3 {
    font-size: 2.5rem;
    text-shadow: 0 0 10px rgba(0,0,0,0.5);
}

/* SON ÇAĞRI BÖLÜMÜ */
/* SON ÇAĞRI BÖLÜMÜ */
.final-cta {
    padding: 6rem 0;
    text-align: center;
    background-image: url('arkaplan-cta.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.final-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8));
    z-index: 1;
}

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

.final-cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.final-cta p {
    max-width: 600px;
    margin: 0 auto 2.5rem auto;
    color: var(--white);
    font-size: 1.2rem;
}

/* FOOTER */
.main-footer {
    padding: 5rem 0 0 0;
    background-color: #0a0a0a;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 3rem;
}

.footer-logo {
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-logo strong {
    color: var(--main-red);
}

.footer-contact p {
    color: var(--grey);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-list {
    list-style: none;
}

.contact-list li {
    margin-bottom: 1.2rem;
    display: flex;
    align-items: flex-start;
}

.contact-list i {
    color: var(--main-red);
    margin-right: 1rem;
    margin-top: 5px;
    font-size: 1.2rem;
    width: 20px;
}

.contact-list address,
.contact-list a {
    color: var(--grey);
    text-decoration: none;
    transition: color 0.3s ease;
    flex: 1;
}

.contact-list a:hover {
    color: var(--main-red);
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

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

.footer-links li {
    margin-bottom: 0.8rem;
}

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

.footer-links a:hover {
    color: var(--main-red);
}

.footer-map {
    border-radius: 10px;
    overflow: hidden;
    height: 300px;
}

.sub-footer {
    background-color: #050505;
    padding: 1.5rem 0;
    margin-top: 3rem;
}

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

.sub-footer p {
    color: var(--grey);
    margin: 0;
}

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

.social-links a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--main-red);
    transform: translateY(-3px);
}

/* RESPONSIVE TASARIM */
@media (max-width: 992px) {
    .services-grid { flex-direction: column; }
    .service-card { height: 300px; }
    .grid-2 { grid-template-columns: 1fr; }
    .why-steel-image { order: -1; }
    .process-timeline::after { left: 31px; }
    .process-step { width: 100%; padding-left: 70px; padding-right: 25px; }
    .process-step:nth-child(even) { left: 0; }
    .process-icon { left: 0; right: auto; }
    .process-step:nth-child(even) .process-icon { left: 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-map { grid-column: span 2; margin-top: 2rem; }
}

@media (max-width: 768px) {
    .navbar .nav-links, .navbar .cta-button { display: none; }
    .menu-toggle { display: flex; }
    .navbar .nav-links.active { 
        display: flex; 
        flex-direction: column; 
        position: absolute; 
        top: 100%; 
        left: 0; 
        width: 100%; 
        background-color: var(--main-black); 
        padding: 1rem 0; 
        border-radius: 0; 
    }
    .navbar .nav-links li { margin: 0.5rem 0; }
    .hero-buttons { display: flex; flex-direction: column; gap: 1rem; }
    .btn { margin: 0; width: 100%; text-align: center; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .project-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-map { grid-column: span 1; }
    .sub-footer .container { flex-direction: column; gap: 1rem; }
}

@media (max-width: 576px) {
    .container { padding: 0 15px; }
    .hero-content h1 { font-size: 2rem; }
    .hero-content p { font-size: 1rem; }
    .section-title { font-size: 2rem; }
    .stats-grid { grid-template-columns: 1fr; }
    .quality-features { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  h1, h2, h3 { line-height: 1.2; }
  .section-title { font-size: 1.8rem; }
  .services-grid, .quality-features { gap: 1rem; }
  .btn { margin: 0; width: 100%; }
  .footer-grid { text-align: center; }
}
.why-steel-content h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.why-steel-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  text-align: center;
  color: #dd1212;
}

.why-steel-content ul {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.why-steel-content li {
  margin-bottom: 0.8rem;
  line-height: 1.5;
  font-size: 1rem;
  display: flex;
  align-items: start;
  gap: 0.5rem;
}

.why-steel-content li i {
  color: #e60000;
  min-width: 20px;
  margin-top: 4px;
}

.btn.btn-secondary {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border-radius: 6px;
}
.btn.btn-secondary:hover {
  background-color: #e60000;
  color: #fff;
  transform: translateY(-2px);
}



/* FAQ Bölümü Stilleri */
.faq {
    padding: 6rem 0;
    background-color: var(--main-black);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: rgba(40, 40, 40, 0.5);
    margin-bottom: 1.5rem;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: all var(--transition-speed) ease;
}

.faq-item:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transform: translateY(-5px);
    border-color: var(--main-red);
}

.faq-question {
    width: 100%;
    padding: 1.8rem;
    background-color: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    transition: all var(--transition-speed) ease;
    font-family: 'Montserrat', sans-serif;
    letter-spacing: 0.5px;
    line-height: 1.5;
}

.faq-question:hover {
    color: var(--white);
}

.faq-question i {
    font-size: 1rem;
    color: var(--main-red);
    transition: transform var(--transition-speed) ease;
    width: 20px;
    text-align: center;
}

.faq-item.active .faq-question {
    color: var(--white);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: var(--main-red);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 1.8rem 1.8rem 1.8rem;
    color: var(--white);
    line-height: 1.9;
    font-size: 1.05rem;
    font-family: 'Open Sans', sans-serif;
    letter-spacing: 0.3px;
    word-spacing: 0.1em;
}

/* MİSYON & VİZYON BÖLÜMÜ */
.mission {
  padding: 6rem 0;
  background: (135deg, rgba(230, 0, 0, 0.05) 0%, rgba(16, 16, 16, 0) 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 3rem;
  max-width: 900px;
  margin: 0 auto;
}

.mission-card {
  background-color: rgba(40, 40, 40, 0.5);
  padding: 2.5rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all var(--transition-speed) ease;
  position: relative;
}

.mission-card:hover {
  transform: translateY(-10px);
  border-color: var(--main-red);
  box-shadow: 0 15px 40px rgba(230, 0, 0, 0.15);
}

.mission-icon {
  font-size: 3.5rem;
  color: var(--main-red);
  margin-bottom: 1.5rem;
}

.mission-card h3 {
  color: var(--white);
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.mission-subtitle {
  color: var(--main-red);
  font-weight: 600;
  margin-bottom: 1rem;
}

.mission-card p {
  color: var(--grey);
  line-height: 1.8;
}

/* DEĞERLER BÖLÜMÜ */
.values {
  padding: 6rem 0;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.value-card {
  background-color: rgba(40, 40, 40, 0.5);
  padding: 2rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all var(--transition-speed) ease;
}

.value-card:hover {
  transform: translateY(-8px);
  border-color: var(--main-red);
  background-color: rgba(40, 40, 40, 0.8);
}

.value-icon {
  font-size: 2.8rem;
  color: var(--main-red);
  margin-bottom: 1rem;
}

.value-card h4 {
  color: var(--white);
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
}

.value-card p {
  color: var(--grey);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* BAŞARILAR KUTUSU */
.achievements {
  padding: 4rem 0;
}

.achievement-box {
  background: linear-gradient(135deg, rgba(230, 0, 0, 0.1) 0%, rgba(230, 0, 0, 0.05) 100%);
  border: 2px solid var(--main-red);
  border-radius: 15px;
  padding: 3rem;
  text-align: center;
  box-shadow: 0 10px 40px rgba(230, 0, 0, 0.1);
}

.achievement-box h3 {
  color: var(--main-red);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.achievement-content {
  max-width: 700px;
  margin: 0 auto;
}

.achievement-content p {
  color: var(--light-white);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 2rem;
}

/* RESPONSIVE DEĞERLERLERİ */
@media (max-width: 768px) {
  .mission {
    padding: 4rem 0;
  }
  
  .mission-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .mission-card {
    padding: 2rem;
  }
  
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  
  .value-card {
    padding: 1.5rem;
  }
  
  .achievement-box {
    padding: 2rem;
  }
  
  .achievement-box h3 {
    font-size: 1.5rem;
  }
}

@media (max-width: 576px) {
  .mission-grid {
    grid-template-columns: 1fr;
  }
  
  .values-grid {
    grid-template-columns: 1fr;
  }
  
  .mission-icon {
    font-size: 2.5rem;
  }
  
  .value-icon {
    font-size: 2rem;
  }
  
  .achievement-box {
    padding: 1.5rem;
  }
  
  .achievement-box h3 {
    font-size: 1.2rem;
  }
  
  .achievement-content p {
    font-size: 0.95rem;
  }
}

/* TEKLIF SAYFASI */
.teklif-hero {
    background-image: url('teklif-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--white);
    padding: 120px 0 80px 0;
    text-align: center;
    margin-top: 70px;
    position: relative;
}

.teklif-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(16, 16, 16, 0.8), rgba(16, 16, 16, 0.9));
    z-index: -1;
}

.teklif-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    letter-spacing: 1px;
}

.teklif-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    color: var(--grey);
}

.teklif-form {
    padding: 60px 0;
    background: var(--main-black);
}

.form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(40, 40, 40, 0.5);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.form-section {
    margin-bottom: 40px;
}

.form-section h2 {
    font-size: 1.5rem;
    color: var(--main-red);
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--main-red);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--white);
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--white);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--grey);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--main-red);
    background-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(230, 0, 0, 0.15);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    font-weight: 400;
    cursor: pointer;
    gap: 10px;
    color: var(--grey);
}

.checkbox-label input {
    width: auto;
    margin-top: 3px;
    cursor: pointer;
    flex-shrink: 0;
    accent-color: var(--main-red);
}

.checkbox-label a {
    color: var(--main-red);
    text-decoration: none;
    transition: all 0.3s ease;
}

.checkbox-label a:hover {
    text-decoration: underline;
    color: var(--light-red);
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.form-actions .btn {
    flex: 1;
    padding: 14px 30px;
    font-size: 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-message {
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 600;
    text-align: center;
}

.form-message.success {
    background-color: rgba(76, 175, 76, 0.2);
    color: #81c784;
    border: 1px solid rgba(76, 175, 76, 0.4);
}

.form-message.error {
    background-color: rgba(244, 67, 54, 0.2);
    color: #ef5350;
    border: 1px solid rgba(244, 67, 54, 0.4);
}

/* TEKLIF FAYDALARı */
.teklif-benefits {
    padding: 60px 0;
    background: var(--main-black);
}

.teklif-benefits h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 1.5rem;
}

.teklif-benefits h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--main-red);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.benefit-item {
    text-align: center;
    padding: 30px;
    background: rgba(40, 40, 40, 0.5);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.benefit-item:hover {
    background: rgba(40, 40, 40, 0.8);
    transform: translateY(-8px);
    border-color: var(--main-red);
    box-shadow: 0 10px 30px rgba(230, 0, 0, 0.15);
}

.benefit-item i {
    font-size: 2.5rem;
    color: var(--main-red);
    margin-bottom: 15px;
}

.benefit-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--white);
    font-family: 'Montserrat', sans-serif;
}

.benefit-item p {
    color: var(--grey);
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
    .teklif-hero h1 {
        font-size: 1.8rem;
    }

    .form-wrapper {
        padding: 20px;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .teklif-hero {
        padding: 80px 0 60px 0;
    }

    .teklif-hero h1 {
        font-size: 1.5rem;
    }

    .teklif-hero p {
        font-size: 1rem;
    }

    .form-wrapper {
        padding: 15px;
    }

    .form-section h2 {
        font-size: 1.2rem;
    }
}

/* Form Stil Güncellemeleri */
.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23E60000' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-group select option {
    background-color: #1a1a1a;
    color: var(--white);
    padding: 8px;
}

.form-group select option:hover {
    background-color: var(--main-red);
    color: var(--white);
}

.form-group select option:checked {
    background: linear-gradient(var(--main-red), var(--main-red));
    background-color: var(--main-red);
    color: var(--white);
}

/* NEDEN HAFİF ÇELİK SAYFASI SPESIFIK STİLLERİ */

/* Hero Section - Why Steel Page */
.hero-why-steel {
    height: 100vh;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    background-image: url('celikyapi.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-why-steel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(16, 16, 16, 0.7), rgba(16, 16, 16, 0.85));
    z-index: -1;
}

.hero-why-steel .hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
    letter-spacing: 3px;
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.8);
}

.hero-why-steel .hero-content p {
    font-size: clamp(1rem, 2vw, 1.3rem);
    max-width: 700px;
    margin: 0 auto;
    font-weight: 600;
    color: var(--light-grey);
}

/* AVANTAJLAR BÖLÜMÜ */
.advantages {
    padding: 7rem 0;
    background-color: var(--main-black);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.advantage-card {
    background-color: rgba(40, 40, 40, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--main-red), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-speed) ease;
}

.advantage-card:hover {
    background-color: rgba(40, 40, 40, 0.8);
    transform: translateY(-12px);
    border-color: var(--main-red);
    box-shadow: 0 15px 40px rgba(230, 0, 0, 0.2);
}

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

.advantage-image {
    font-size: 4rem;
    color: var(--main-red);
    margin-bottom: 1.5rem;
    height: 80px;
    display: flex;
    align-items: center;
}

.advantage-content h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.advantage-content p {
    color: var(--grey);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.advantage-list {
    list-style: none;
    padding: 0;
}

.advantage-list li {
    color: var(--light-grey);
    margin-bottom: 0.8rem;
    padding-left: 0;
    font-size: 0.95rem;
    line-height: 1.6;
}

.advantage-list li strong {
    color: var(--main-red);
}

/* KARŞILAŞTIRMA BÖLÜMÜ */
.comparison {
    padding: 7rem 0;
    background-color: rgba(230, 0, 0, 0.03);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: 3rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: rgba(40, 40, 40, 0.5);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.comparison-table thead {
    background-color: rgba(230, 0, 0, 0.1);
    border-bottom: 2px solid var(--main-red);
}

.comparison-table thead th {
    padding: 1.5rem;
    text-align: left;
    color: var(--main-white);
    font-weight: 700;
    font-size: 1.1rem;
    border-right: 1px solid var(--border-color);
}

.comparison-table thead th:last-child {
    border-right: none;
}

.comparison-table tbody td {
    padding: 1.3rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--light-grey);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.comparison-table tbody td:first-child {
    color: var(--white);
    font-weight: 600;
    background-color: rgba(0, 0, 0, 0.3);
}

.table-row-highlight td {
    background-color: rgba(0, 0, 0, 0.08);
}

.table-row-highlight td:first-child {
    background-color: rgba(0, 0, 0, 0.15);
}

/* TEKNİK DETAYLAR */
.technical-details {
    padding: 7rem 0;
    background-color: var(--main-black);
}

.technical-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.technical-card {
    background: linear-gradient(135deg, rgba(40, 40, 40, 0.6) 0%, rgba(230, 0, 0, 0.05) 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    text-align: center;
    transition: all var(--transition-speed) ease;
    position: relative;
}

.technical-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(230, 0, 0, 0.1) 0%, transparent 70%);
    border-radius: 0 12px 0 100%;
    pointer-events: none;
}

.technical-card:hover {
    background: linear-gradient(135deg, rgba(40, 40, 40, 0.9) 0%, rgba(230, 0, 0, 0.1) 100%);
    transform: translateY(-10px);
    border-color: var(--main-red);
    box-shadow: 0 15px 40px rgba(230, 0, 0, 0.15);
}

.technical-icon {
    font-size: 3rem;
    color: var(--main-red);
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.technical-card h3 {
    color: var(--white);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.technical-card p {
    color: var(--grey);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    position: relative;
    z-index: 1;
    font-size: 0.95rem;
}

.spec-list {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.spec-badge {
    background-color: rgba(230, 0, 0, 0.2);
    color: var(--main-red);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid var(--main-red);
}

/* İNFOGRAFİK BÖLÜMÜ */
.infographic {
    padding: 7rem 0;
    background-color: rgba(230, 0, 0, 0.03);
    border-top: 1px solid var(--border-color);
}

.process-infographic {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 4rem;
    flex-wrap: wrap;
}

.infographic-step {
    background-color: rgba(40, 40, 40, 0.6);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    width: 200px;
    text-align: center;
    position: relative;
    transition: all var(--transition-speed) ease;
}

.infographic-step:hover {
    background-color: rgba(40, 40, 40, 0.9);
    border-color: var(--main-red);
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(230, 0, 0, 0.2);
}

.step-number {
    position: absolute;
    top: -15px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--main-red), #ff6666);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 900;
    box-shadow: 0 5px 15px rgba(230, 0, 0, 0.3);
}

.step-icon {
    font-size: 3rem;
    color: var(--main-red);
    margin-bottom: 1rem;
}

.infographic-step h4 {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.infographic-step p {
    color: var(--grey);
    font-size: 0.9rem;
    line-height: 1.6;
}

.infographic-arrow {
    font-size: 2rem;
    color: var(--main-red);
    animation: arrow-pulse 2s ease-in-out infinite;
}

@keyframes arrow-pulse {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(8px); }
}

/* PROJE ÖRNEKLERİ */
.project-examples {
    padding: 7rem 0;
    background-color: var(--main-black);
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.example-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    height: 350px;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-speed) ease;
}

.example-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.example-card:hover img {
    transform: scale(1.1) rotate(1deg);
}

.example-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(16, 16, 16, 1) 0%, rgba(16, 16, 16, 0) 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.example-card:hover .example-overlay {
    opacity: 1;
}

.example-overlay h3 {
    color: var(--white);
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.example-stats {
    display: flex;
    gap: 1.5rem;
}

.example-stats span {
    color: var(--main-red);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* KATALOG BÖLÜMÜ (Projeler sayfası) */
.catalog-section {
  padding: 6rem 0;
  background: var(--main-black);
  position: relative;
}
.catalog-section::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle at 50% 50%, rgba(230,0,0,0.18), transparent 60%);
  filter: blur(8px);
  pointer-events: none;
}
.catalog-section .section-title { letter-spacing: .5px; }
.catalog-section .section-subtitle { color: var(--grey); }

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 1rem;
}

.catalog-item {
  position: relative;
  padding: 28px;
  border-radius: 14px;
  background: rgba(40,40,40,0.55);
  border: 1px solid var(--border-color);
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease, background .25s ease;
  overflow: hidden;
  isolation: isolate;
}
.catalog-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(1200px 200px at 0% 0%, rgba(230,0,0,0.06), transparent 60%);
  opacity: 0.6;
  pointer-events: none;
  z-index: -1;
}
.catalog-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--main-red), rgba(230,0,0,0.2));
  opacity: .5;
  transition: opacity .25s ease;
}
.catalog-item:hover {
  transform: translateY(-8px);
  background: rgba(40,40,40,0.8);
  border-color: rgba(230,0,0,0.35);
  box-shadow: 0 16px 40px rgba(230,0,0,0.15);
}
.catalog-item:hover::before { opacity: 1; }

.catalog-item i {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(230,0,0,0.18), rgba(230,0,0,0.06));
  border: 1px solid rgba(230,0,0,0.35);
  color: var(--light-red);
  box-shadow: 0 8px 22px rgba(230,0,0,0.15), inset 0 0 12px rgba(230,0,0,0.08);
  transition: transform .2s ease, box-shadow .2s ease;
  font-size: 1.4rem;
}
.catalog-item:hover i {
  transform: scale(1.05);
  box-shadow: 0 10px 28px rgba(230,0,0,0.18), inset 0 0 14px rgba(230,0,0,0.12);
}

.catalog-item h4 {
  color: var(--white);
  font-size: 1.2rem;
  margin-bottom: 8px;
  letter-spacing: .3px;
}
.catalog-item p {
  color: var(--grey);
  line-height: 1.7;
  margin: 0;
}

/* Responsive iyileştirmeler */
@media (max-width: 768px) {
  .catalog-grid { gap: 18px; }
  .catalog-item { padding: 22px; }
}
/* vision & values */
.vision-values {
  padding: 6rem 0;
}
.vision-values .section-title { text-align: center; }
.vision-values .section-subtitle {
  text-align: center;
  color: var(--grey);
  margin-bottom: 2.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.vision-values-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.vision-box, .values-box {
  background: rgba(40, 40, 40, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  transition: transform var(--transition-speed) ease, border-color var(--transition-speed) ease, background var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
}
.vision-box:hover, .values-box:hover {
  transform: translateY(-8px);
  border-color: var(--main-red);
  background: rgba(40, 40, 40, 0.8);
  box-shadow: 0 15px 40px rgba(230,0,0,0.15);
}
.vision-values h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  color: var(--white);
}
.vision-values p {
  color: var(--grey);
  line-height: 1.8;
}

/* values list */
.values-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.values-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  color: var(--light-grey);
}
.values-list i {
  color: var(--main-red);
  min-width: 20px;
}