/*
 * Lider Metal - Main Stylesheet
 * Modern, responsive ve profesyonel tasarım
 */

/* ============================================
   Reset & Base Styles
   ============================================ */

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

*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--fs-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--text-gray);
  background-color: var(--white);
  overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--fs-6xl);
}
h2 {
  font-size: var(--fs-5xl);
}
h3 {
  font-size: var(--fs-4xl);
}
h4 {
  font-size: var(--fs-3xl);
}
h5 {
  font-size: var(--fs-2xl);
}
h6 {
  font-size: var(--fs-xl);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: all var(--transition-base);
}

a:hover {
  color: var(--primary-dark);
}

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

/* ============================================
   Left Side Panel - Absolute (Scroll ile Kayar)
   ============================================ */

.left-side-panel {
  position: absolute;
  left: 0;
  top: 0;
  width: 250px;
  height: 100vh;
  z-index: var(--z-dropdown);
  pointer-events: none;
}

.left-side-panel > * {
  pointer-events: all;
}

/* Contact Area - Transparan */
.contact-area {
  position: absolute;
  left: 0;
  top: 0;
  width: 100px;
  height: 100vh;
  background: rgba(19, 27, 44, 0.3);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--spacing-xl) var(--spacing-md) var(--spacing-2xl)
    var(--spacing-md);
  z-index: 1;
}

/* Contact Email (Vertical) */
.vertical-contact {
  position: absolute;
  left: 50%;
  top: calc(50% + 80px);
  transform: translateX(-50%) translateY(-50%) rotate(-90deg);
  transform-origin: center;
  white-space: nowrap;
}

.vertical-contact a {
  color: var(--white);
  font-size: 11px;
  font-weight: var(--font-weight-normal);
  letter-spacing: 1px;
  opacity: 0.9;
}

.vertical-contact a:hover {
  opacity: 1;
}

/* Social Media Icons - Minimal */
.social-media-icons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.social-media-icons a {
  color: var(--white);
  font-size: var(--fs-lg);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.social-media-icons a:hover {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: scale(1.05);
}

/* Logo Area */
.logo-area {
  position: absolute;
  left: 0;
  top: 0;
  width: 250px;
  background: rgba(14, 31, 60, 0.85);
  backdrop-filter: blur(1px);
  padding: var(--spacing-lg);
  text-align: center;
  border-radius: 0 0 40px 0;
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
  z-index: 2;
}

.logo-section .logo-img {
  width: auto;
  height: 100%;
  margin: 0 auto;
}

/* Slider Counter - Logo Altında */
.slider-counter {
  text-align: center;
  padding: var(--spacing-md) 0 0 0;
}

.slider-counter .current-slide {
  font-size: 80px;
  font-weight: var(--font-weight-bold);
  color: var(--white);
  line-height: 1;
  display: block;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* ============================================
   Main Header - Scroll Efekti
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  z-index: var(--z-fixed);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-xl);
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.4), transparent);
  transition: all var(--transition-base);
}

/* Header Logo - Başlangıçta Gizli */
.header-logo {
  opacity: 0;
  transform: translateX(-20px);
  transition: all var(--transition-base);
  pointer-events: none;
}

.header-logo img {
  height: 80px;
  width: auto;
}

/* Header Scrolled State */
.site-header.scrolled {
  background: rgba(49, 80, 142, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  height: 70px;
}

.site-header.scrolled .header-logo {
  opacity: 1;
  transform: translateX(0);
  pointer-events: all;
}

.main-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
}

.nav-menu li a {
  font-size: var(--fs-base);
  font-weight: var(--font-weight-light);
  color: var(--white);
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: all var(--transition-base);
}

.nav-menu li a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--white);
  transition: width var(--transition-base);
}

.nav-menu li a:hover {
  opacity: 0.8;
}

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

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: var(--fs-2xl);
  cursor: pointer;
  padding: var(--spacing-sm);
  position: fixed;
  top: 0;
  right: 0;
  z-index: calc(var(--z-fixed) + 1);
}

/* ============================================
   Main Content Area
   ============================================ */

.main-wrapper {
  min-height: 100vh;
  width: 100%;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  background: #31508e;
  padding: 10px 0;
  position: relative;
  z-index: var(--z-base);
  margin-top: -25px;
  border-radius: 0 20px 0 20px;
}

.cta-content {
  text-align: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.cta-content h2 {
  color: var(--white);
  font-size: var(--fs-2xl);
  margin-bottom: 0;
  font-weight: var(--font-weight-normal);
  display: inline;
}

.cta-content h2 a {
  color: var(--white);
  text-decoration: none;
  transition: all var(--transition-base);
}

.cta-content h2 a:hover {
  opacity: 0.8;
}

.cta-content h2 strong {
  font-weight: var(--font-weight-bold);
}

/* ============================================
   Projeden Montaja Section
   ============================================ */

.projeden-montaja-section {
  padding: var(--spacing-3xl) 0;
  background: var(--white);
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.projeden-montaja-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.projeden-montaja-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-3xl);
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.projeden-text {
  flex: 1;
}

.projeden-text h2 {
  font-size: var(--fs-4xl);
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.projeden-text .subtitle {
  font-size: var(--fs-3xl);
  color: var(--text-gray);
  font-weight: var(--font-weight-light);
}

.projeden-text p {
  color: var(--text-gray);
  line-height: 1.8;
  font-weight: var(--font-weight-light);
  font-size: var(--fs-md);
}

.projeden-text a {
  color: var(--primary-color);
  font-weight: var(--font-weight-bold);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.projeden-image img {
  width: auto;
  height: 100%;
}

/* ============================================
   Neler Yapıyoruz Section - Kompakt & Minimal
   ============================================ */

.neler-yapiyoruz-section {
  padding: 0;
  margin: 60px auto;
  background: transparent;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
}

.neler-yapiyoruz-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.neler-yapiyoruz-wrapper {
  display: flex;
  align-items: stretch;
  max-width: 100%;
  margin: 0;
  background: linear-gradient(135deg, #3e5a8e 0%, #395182 100%);
  border-radius: 40px 0 0 0;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

/* Sol Taraf - Kompakt Metin */
.neler-yapiyoruz-left {
  flex: 0 0 35%;
  padding: 50px 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--white);
}

.neler-yapiyoruz-left h2 {
  font-size: 52px;
  color: var(--white);
  margin-bottom: 0;
  line-height: 1;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.5px;
}

.neler-yapiyoruz-left .subtitle {
  font-size: 48px;
  color: var(--white);
  font-weight: var(--font-weight-light);
  margin-bottom: 20px;
  line-height: normal;
  letter-spacing: -0.5px;
}

.neler-yapiyoruz-left p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 20px;
  font-weight: var(--font-weight-medium);
}

.neler-yapiyoruz-left a {
  color: var(--white);
  font-size: 13px;
  font-weight: var(--font-weight-bold);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: underline;
  transition: all 0.2s ease;
}

.neler-yapiyoruz-left a:hover {
  transform: translateX(3px);
  text-decoration: none;
}

/* Sağ Taraf - Kompakt Kartlar */
.neler-yapiyoruz-right {
  flex: 0 0 65%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 0;
}

/* Service Card - Minimal & Kompakt */
.service-card {
  position: relative;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(15, 30, 55, 0.3) 0%, rgba(10, 20, 40, 0.7) 100%);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover::before {
  background: linear-gradient(135deg, rgba(15, 30, 55, 0.68) 0%, rgba(10, 20, 40, 0.78) 100%);
}

.service-card h3 {
  position: relative;
  z-index: 1;
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  margin: 0;
  line-height: 1.35;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: 0.2px;
}

.service-card:hover {
  transform: translateY(-3px);
  z-index: 2;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
}

.service-card:hover h3 {
  transform: translateY(-2px);
}

/* ============================================
   Neden Lider Metal Section - Görseldeki Gibi
   ============================================ */

.neden-lider-metal-section {
  padding: 60px 0 80px;
  background: white;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
}

.neden-lider-metal-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.neden-lider-metal-header {
  text-align: center;
  max-width: 1100px;
  margin: 0 auto 50px;
  padding: 0 var(--spacing-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
}

.neden-lider-metal-section.visible .neden-lider-metal-header {
  opacity: 1;
  transform: translateY(0);
}

.neden-lider-metal-header h2 {
  font-size: 48px;
  color: #656565;
  margin-bottom: 20px;
  font-weight: var(--font-weight-light);
}

.neden-lider-metal-header h2 strong {
  color: #656565;
  font-weight: var(--font-weight-bold);
}

.neden-lider-metal-header p {
  font-size: 14px;
  color: #656565;
  line-height: 1.7;
  margin: 0;
  font-weight: var(--font-weight-light);
}

/* Flex Container - Satırlar */
.neden-lider-metal-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: 30px;
  align-items: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
}

.neden-lider-metal-section.visible .neden-lider-metal-grid {
  opacity: 1;
  transform: translateY(0);
}

/* Satırlar */
.reason-row {
  display: flex;
  flex-direction: row;
  gap: 30px;
  justify-content: center;
  width: 100%;
}

/* Üst satır - 3 kart */
.reason-row.top {
  justify-content: center;
}

/* Alt satır - 2 kart ortada */
.reason-row.bottom {
  justify-content: center;
}

/* Kartlar - Sabit Genişlik */
.reason-card {
  background: #f0f0f0;
  padding: 35px 25px;
  border-radius: 40px 0 40px 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  width: 280px;
  flex-shrink: 0;
  opacity: 0;
  transform: translateY(30px);
}

/* Scroll animasyonu - kartlar görününce */
.neden-lider-metal-section.visible .reason-card {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger animasyon - kartlar sırayla gelsin */
.neden-lider-metal-section.visible .reason-card:nth-child(1) {
  transition-delay: 0.1s;
}
.neden-lider-metal-section.visible .reason-row .reason-card:nth-child(1) {
  transition-delay: 0.1s;
}
.neden-lider-metal-section.visible .reason-row .reason-card:nth-child(2) {
  transition-delay: 0.2s;
}
.neden-lider-metal-section.visible .reason-row .reason-card:nth-child(3) {
  transition-delay: 0.3s;
}
.neden-lider-metal-section.visible .reason-row.bottom .reason-card:nth-child(1) {
  transition-delay: 0.4s;
}
.neden-lider-metal-section.visible .reason-row.bottom .reason-card:nth-child(2) {
  transition-delay: 0.5s;
}

/* Hover - Tüm kartlara mavi gradient */
.reason-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  background: linear-gradient(135deg, #3e5a8e 0%, #2c4579 100%);
}

.reason-card:hover h3 {
  color: white;
}

.reason-card:hover p {
  color: rgba(255, 255, 255, 0.95);
}

/* Featured Card - Varsayılan olarak mavi (2. kart) */
.reason-card.featured {
  background: linear-gradient(135deg, #3e5a8e 0%, #2c4579 100%);
  color: white;
  border-radius: 40px 0 40px 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.reason-card.featured:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.reason-card h3 {
  font-size: 16px;
  color: #31508c;
  margin-bottom: 12px;
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  transition: color 0.3s ease;
}

.reason-card.featured h3 {
  color: white;
}

.reason-card p {
  font-size: 12px;
  color: #656565;
  line-height: 1.6;
  margin: 0;
  font-weight: var(--font-weight-light);
  transition: color 0.3s ease;
}

.reason-card.featured p {
  color: rgba(255, 255, 255, 0.95);
}

/* ============================================
   Projeler Section - Sadece Hover (Click YOK)
   ============================================ */

.projeler-section {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
  z-index: 2;
  position: relative;
}

.projeler-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.projeler-header {
  text-align: center;
  max-width: 1100px;
  margin: 0 auto 60px;
  padding: 0 20px;
}

.projeler-header h2 {
  font-size: 48px;
  color: #656565;
  margin-bottom: 20px;
  font-weight: 700;
}

.projeler-header p {
  font-size: 14px;
  color: #656565;
  line-height: 1.7;
  margin: 0;
  font-weight: 300;
}

.projeler-container {
  display: flex;
  justify-content: center;
  padding: 0 20px;
    z-index: 2;
  position: relative;
}

/* Options Container - Max 1200px, Boy Otomatik */
.options {
  display: flex;
  flex-direction: row;
  gap: 0;
  max-width: 1200px;
  width: 100%;
  min-height: 70vh;
  height: auto;
}

/* Option Kart */
.option {
  position: relative;
  overflow: hidden;
  flex: 1;
  min-width: 80px;
  background: var(--optionBackground, #ccc);
  background-size: cover;
  background-position: center;
  cursor: pointer;
  transition: all 0.5s cubic-bezier(0.05, 0.61, 0.41, 0.95);
  border-radius: 0;
}

/* SADECE Hover (Click YOK) */
.option:hover {
  flex: 3;
}

.option:hover .shadow {
  background: linear-gradient(to right, 
    rgba(0,0,0,0.55) 0%, 
    transparent 70%);
}

.option:hover .number-center {
  opacity: 0;
  pointer-events: none;
}

.option:hover .location {
  opacity: 0;
}

.option:hover .info-panel {
  right: 50px;
  opacity: 1;
}

/* Normal (Küçük) Kart */
.option:not(:hover) .shadow {
  background: linear-gradient(to bottom, 
    transparent 0%, 
    rgba(0,0,0,0.6) 100%);
}

.option:not(:hover) .number-center {
  opacity: 1;
}

.option:not(:hover) .location {
  opacity: 1;
}

.option:not(:hover) .info-panel {
  right: -500px;
  opacity: 0;
}

/* Shadow Overlay - Hafif */
.shadow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  transition: all 0.5s cubic-bezier(0.05, 0.61, 0.41, 0.95);
}

/* Numara ORTADA */
.number-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  text-align: center;
  transition: all 0.5s ease;
}

.number-center .number {
  display: block;
  font-size: 100px;
  font-weight: 700;
  color: white;
  line-height: 1;
  text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
  margin-bottom: 10px;
}

.number-center .title {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: white;
  text-shadow: 1px 1px 5px rgba(0,0,0,0.5);
}

/* Lokasyon SAĞ ALT KÖŞE */
.location {
  position: absolute;
  bottom: 15px;
  right: 15px;
  z-index: 2;
  color: white;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.5s ease;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.location::before {
  content: "📍";
  font-size: 14px;
}

/* Info Panel - Sağda (Hover'de) */
.info-panel {
  position: absolute;
  right: -500px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  max-width: 450px;
  transition: all 0.5s cubic-bezier(0.05, 0.61, 0.41, 0.95);
}

.info-panel .main-title {
  font-size: 32px;
  font-weight: 700;
  color: white;
  margin-bottom: 12px;
  text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
  line-height: 1.2;
}

.info-panel .sub-location {
  font-size: 15px;
  color: white;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.info-panel .sub-location::before {
  content: "📍";
  font-size: 16px;
}

.info-panel .description {
  font-size: 14px;
  line-height: 1.7;
  color: white;
  margin-bottom: 25px;
  font-weight: 300;
  text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
}

/* Proje Detay Button */
.proje-detay-btn {
  display: inline-block;
  padding: 12px 30px;
  background: white;
  color: #31508c;
  font-size: 14px;
  font-weight: 700;
  border-radius: 25px;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.proje-detay-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
  background: #f8f9fa;
}

/* Responsive */
@media (max-width: 991px) {
  .options {
    flex-direction: column;
    min-height: auto;
    height: auto;
  }
  
  .option {
    min-height: 120px;
  }
  
  .option:hover {
    min-height: 400px;
  }
}
/* ============================================
   Referanslar Section - Logo Slider
   ============================================ */

.referanslar-section {
  padding: 15rem 0;
  background: #F0F0F0;
  overflow: hidden;
  margin-top: -200px;
  padding-top: 280px;
}

.referanslar-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.referanslar-container h2 {
  text-align: center;
  font-size: 48px;
  color: #656565;
  margin-bottom: 60px;
  font-weight: 700;
}

/* Logo Slider Container */
.logo-slider {
  width: 100%;
  overflow: hidden;
  position: relative;
}

/* Logo Track (Hareket Eden Kısım) */
.logo-track {
  display: flex;
  gap: 80px;
  animation: scroll-logos 30s linear infinite;
  width: fit-content;
}

/* Hover'da Durdur */
.logo-slider:hover .logo-track {
  animation-play-state: paused;
}

/* Logo Item */
.logo-item {
  flex-shrink: 0;
  width: 200px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.logo-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.logo-item img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all 0.3s ease;
}

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

/* Sonsuz Döngü Animasyonu */
@keyframes scroll-logos {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* Responsive */
@media (max-width: 991px) {
  .referanslar-section {
    margin-top: -150px;
    padding-top: 230px;
  }
  
  .referanslar-container h2 {
    font-size: 40px;
    margin-bottom: 40px;
  }
  
  .logo-track {
    gap: 60px;
  }
  
  .logo-item {
    width: 160px;
    height: 100px;
  }
}

@media (max-width: 768px) {
  .referanslar-section {
    padding: 60px 0;
    margin-top: -100px;
    padding-top: 160px;
  }
  
  .referanslar-container h2 {
    font-size: 32px;
    margin-bottom: 30px;
  }
  
  .logo-track {
    gap: 40px;
    animation-duration: 20s;
  }
  
  .logo-item {
    width: 140px;
    height: 90px;
    padding: 15px;
  }
}

@media (max-width: 576px) {
  .referanslar-section {
    margin-top: -80px;
    padding-top: 140px;
  }
  
  .referanslar-container h2 {
    font-size: 28px;
  }
  
  .logo-track {
    gap: 30px;
  }
  
  .logo-item {
    width: 120px;
    height: 80px;
    padding: 12px;
  }
}
/* ============================================
   Utility Classes
   ============================================ */

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

.mt-0 {
  margin-top: 0;
}
.mt-1 {
  margin-top: var(--spacing-sm);
}
.mt-2 {
  margin-top: var(--spacing-md);
}
.mt-3 {
  margin-top: var(--spacing-lg);
}
.mt-4 {
  margin-top: var(--spacing-xl);
}

.mb-0 {
  margin-bottom: 0;
}
.mb-1 {
  margin-bottom: var(--spacing-sm);
}
.mb-2 {
  margin-bottom: var(--spacing-md);
}
.mb-3 {
  margin-bottom: var(--spacing-lg);
}
.mb-4 {
  margin-bottom: var(--spacing-xl);
}

/* ============================================
   Back to Top Button
   ============================================ */

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: var(--fs-lg);
  cursor: pointer;
  z-index: var(--z-fixed);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-5px);
  box-shadow: var(--shadow-2xl);
}

/* ============================================
   Body States
   ============================================ */

body.menu-open {
  overflow: hidden;
}

body.menu-open::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: calc(var(--z-fixed) - 1);
}

/* ============================================
   Responsive Styles
   ============================================ */

/* 1400px+ - Çok Büyük Ekranlar */
@media (min-width: 1400px) {
  .vertical-contact {
    top: calc(50% + 100px);
  }
  
  .neler-yapiyoruz-wrapper {
    max-width: 1600px;
    margin: 0 auto;
  }
}

/* Laptop: 992px - 1199px */
@media (max-width: 1199px) {
  .left-side-panel,
  .logo-area {
    width: 220px;
  }

  .contact-area {
    width: 80px;
  }

  .logo-area {
    padding: var(--spacing-md);
    border-radius: 0 0 35px 0;
  }

  .slider-counter {
    padding: var(--spacing-md) 0 0 0;
  }

  .slider-counter .current-slide {
    font-size: 80px;
  }

  .vertical-contact {
    top: calc(50% + 60px);
  }

  .vertical-contact a {
    font-size: 10px;
  }

  .social-media-icons {
    gap: var(--spacing-sm);
  }

  .social-media-icons a {
    width: 35px;
    height: 35px;
    font-size: var(--fs-base);
  }

  .nav-menu {
    gap: var(--spacing-md);
  }

  .projeden-montaja-content {
    flex-direction: column;
  }
  
  .neler-yapiyoruz-left h2,
  .neler-yapiyoruz-left .subtitle {
    font-size: 44px;
  }
  
  .neler-yapiyoruz-right {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .neden-lider-metal-header h2 {
    font-size: 40px;
  }
  
  .projeler-header h2 {
    font-size: 40px;
  }
}

/* Tablet: 768px - 991px */
@media (max-width: 991px) {
  .left-side-panel,
  .logo-area {
    width: 140px;
    top: 3rem;
  }

  .contact-area {
    width: 70px;
    padding: var(--spacing-lg) var(--spacing-sm) var(--spacing-xl)
      var(--spacing-sm);
  }

  .logo-area {
    padding: var(--spacing-sm);
    border-radius: 0 0 30px 0;
  }

  .slider-counter {
    padding: var(--spacing-sm) 0 0 0;
  }

  .slider-counter .current-slide {
    font-size: 60px;
  }

  .vertical-contact {
    top: calc(50% + 40px);
  }

  .vertical-contact a {
    font-size: 9px;
  }

  .social-media-icons a {
    width: 30px;
    height: 30px;
    font-size: var(--fs-sm);
  }

  /* Mobile Header - Logo Her Zaman Görünür */
  .site-header {
    background: rgba(49, 80, 142, 0.95);
    backdrop-filter: blur(10px);
    height: 70px;
  }

  .header-logo {
    opacity: 1;
    transform: translateX(0);
    pointer-events: all;
  }

  .header-logo img {
    height: 40px;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: rgba(49, 80, 142, 0.98);
    backdrop-filter: blur(10px);
    padding: var(--spacing-3xl) var(--spacing-xl);
    transition: right var(--transition-base);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    overflow-y: auto;
  }

  .main-nav.active {
    right: 0;
  }

  .nav-menu {
    flex-direction: column;
    gap: var(--spacing-lg);
    width: 100%;
    margin-top: 60px;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu li a {
    display: block;
    padding: var(--spacing-md) 0;
    font-size: var(--fs-lg);
  }

  .mobile-menu-toggle {
    display: block;
  }
  
  .neler-yapiyoruz-wrapper {
    flex-direction: column;
    border-radius: 20px;
  }
  
  .neler-yapiyoruz-left {
    flex: 1;
    padding: 35px 25px;
  }
  
  .neler-yapiyoruz-left h2,
  .neler-yapiyoruz-left .subtitle {
    font-size: 40px;
  }
  
  .neler-yapiyoruz-right {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(4, 1fr);
  }
  
  .neden-lider-metal-grid {
    gap: 20px;
  }
  
  .reason-row {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }
  
  .reason-card {
    width: 100%;
    max-width: 450px;
  }
  
  .neden-lider-metal-header h2 {
    font-size: 36px;
  }
  
  .projeler-header h2 {
    font-size: 36px;
  }
  
  .options {
    min-width: 400px;
    height: 350px;
  }
  
  .option:nth-child(4) {
    display: none;
  }
}

/* Mobile: 576px - 767px */
@media (max-width: 767px) {
  .left-side-panel,
  .logo-area {
    width: 100px;
  }

  .contact-area {
    width: 55px;
    padding: var(--spacing-md) 5px var(--spacing-lg) 5px;
  }

  .logo-area {
    padding: var(--spacing-xs) 5px;
    border-radius: 0 0 25px 0;
  }

  .slider-counter {
    padding: var(--spacing-xs) 0 0 0;
  }

  .slider-counter .current-slide {
    font-size: 45px;
  }

  .vertical-contact {
    top: calc(50% + 25px);
  }

  .vertical-contact a {
    font-size: 8px;
  }

  .social-media-icons a {
    width: 28px;
    height: 28px;
    font-size: 11px;
  }

  .cta-section {
    padding: 40px 0;
  }

  .cta-content h2 {
    font-size: var(--fs-lg);
  }

  .projeden-text h2 {
    font-size: var(--fs-2xl);
  }
  
  .neler-yapiyoruz-left {
    padding: 25px 20px;
  }
  
  .neler-yapiyoruz-left h2,
  .neler-yapiyoruz-left .subtitle {
    font-size: 32px;
  }
  
  .neler-yapiyoruz-left p {
    font-size: 13px;
  }
  
  .neler-yapiyoruz-right {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(8, 1fr);
  }
  
  .service-card {
    min-height: 140px;
  }
  
  .service-card h3 {
    font-size: 14px;
  }
  
  .neden-lider-metal-section {
    padding: 40px 0 60px;
  }
  
  .neden-lider-metal-header {
    margin-bottom: 40px;
  }
  
  .neden-lider-metal-header h2 {
    font-size: 32px;
  }
  
  .neden-lider-metal-header p {
    font-size: 13px;
  }
  
  .reason-card {
    padding: 30px 20px;
    width: 100%;
    max-width: 100%;
  }
  
  .reason-card h3 {
    font-size: 15px;
  }
  
  .reason-card p {
    font-size: 11px;
  }
  
  .projeler-section {
    padding: 60px 0;
  }
  
  .projeler-header {
    margin-bottom: 40px;
  }
  
  .projeler-header h2 {
    font-size: 32px;
  }
  
  .projeler-header p {
    font-size: 13px;
  }
  
  .projeler-container {
    padding: 0 10px;
  }
  
  .options {
    flex-direction: column;
    min-width: 100%;
    width: 100%;
    height: auto;
    min-height: 500px;
  }
  
  .option {
    min-height: 80px;
    margin: 5px;
    border-radius: 20px;
  }
  
  .option.active {
    min-height: 400px;
    border-radius: 30px 0 30px 0;
  }
  
  .option:nth-child(3),
  .option:nth-child(4) {
    display: none;
  }
  
  .label .number {
    font-size: 50px;
  }
  
  .label .info .main {
    font-size: 20px;
  }
  
  .label .info .sub {
    font-size: 12px;
  }
  
  .label .info .description {
    font-size: 12px;
    max-width: 100%;
  }
  
  .proje-detay-btn {
    padding: 10px 20px;
    font-size: 13px;
  }
}

/* Small Mobile: < 576px */
@media (max-width: 575px) {
  .left-side-panel,
  .logo-area {
    width: 80px;
  }

  .contact-area {
    width: 45px;
    padding: var(--spacing-sm) 2px var(--spacing-md) 2px;
  }

  .logo-area {
    padding: var(--spacing-xs) 2px;
    border-radius: 0 0 20px 0;
  }

  .slider-counter .current-slide {
    font-size: 35px;
  }

  .vertical-contact {
    display: none;
  }

  .social-media-icons {
    gap: 8px;
  }

  .social-media-icons a {
    width: 24px;
    height: 24px;
    font-size: 10px;
    border-width: 1px;
  }

  .site-header {
    padding: var(--spacing-md);
  }

  .cta-section {
    padding: 30px 0;
  }

  .cta-content h2 {
    font-size: var(--fs-base);
  }
  
  .neler-yapiyoruz-section {
    margin: 30px 0;
  }
  
  .service-card {
    min-height: 120px;
  }
  
  .service-card h3 {
    font-size: 13px;
  }
  
  .neden-lider-metal-header h2 {
    font-size: 28px;
  }
  
  .projeler-header h2 {
    font-size: 28px;
  }
  
  .option {
    min-height: 70px;
  }
  
  .option.active {
    min-height: 350px;
  }
  
  .label .number {
    font-size: 40px;
  }
  
  .label .info .main {
    font-size: 18px;
  }
}