@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* =========================================
   1. VARIABLES & DESIGN TOKENS
   ========================================= */
:root {
  /* Colors - Premium Lacivert Light Theme */
  --color-primary: #0A1929; /* Derin Lacivert */
  --color-primary-light: #132F4C; /* Açık Lacivert */
  --color-primary-dark: #001E3C; /* En Koyu Lacivert */
  --color-secondary: #64748B;
  --color-accent: #C9A84C; /* Altın Vurgu */
  --color-bg: #F0F4F8; /* Buzlu Mavi Gri Arka Plan */
  --color-surface: #FFFFFF;
  --color-border: #E2E8F0;
  --color-text-primary: #0F172A;
  --color-text-secondary: #64748B;
  --color-success: #16A34A;
  
  /* Footer ve Kartlar İçin Özel Tema Renkleri (AÇIK TEMA) */
  --color-footer-bg: #F0F4F8; /* Açık temada footer arka planı */
  --color-footer-heading: #0F172A; /* Açık temada footer başlıkları */
  
  /* RGB Values for Alpha Usage */
  --color-surface-rgb: 255, 255, 255;
  --color-bg-rgb: 240, 244, 248;
  
  /* Typography — kurumsal sans-serif */
  --font-display: 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  
  /* Utilities */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
  --radius-md: 6px;
  --radius-lg: 8px;
  --container-max: 1200px;
}

/* Dark Theme Overrides - Düzeltilmiş Derin Lacivert */
[data-theme="dark"] {
  --color-primary: #132F4C; /* CTA ve vurgu alanları için Açık Lacivert */
  --color-primary-light: #90CAF9; /* Mavi vurgu */
  --color-primary-dark: #001E3C; /* Footer ve en koyu alanlar */
  --color-bg: #001E3C; /* Ana arka plan - En Derin Lacivert */
  --color-surface: #0A1929; /* Kart ve yüzeyler - Orta Lacivert */
  --color-border: #1E3A5F; /* Kenarlıklar */
  --color-text-primary: #F0F4F8;
  --color-text-secondary: #94A3B8;
  
  /* Footer ve Kartlar İçin Özel Tema Renkleri (KOYU TEMA) */
  --color-footer-bg: #001E3C; /* Koyu temada footer lacivert olsun */
  --color-footer-heading: #F0F4F8; /* Koyu temada footer başlıkları beyaz olsun */
  
  /* Dark Theme RGB Values */
  --color-surface-rgb: 10, 25, 41;
  --color-bg-rgb: 0, 30, 60;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.6);
}

/* =========================================
   2. RESET & BASE
   ========================================= */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.7;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

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

.section-header { text-align: center; margin-bottom: 64px; }
.eyebrow {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary-dark);
  background: rgba(201, 168, 76, 0.15);
  padding: 6px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}
[data-theme="dark"] .eyebrow {
  color: var(--color-accent);
  background: rgba(201, 168, 76, 0.12);
}

.section-header h2 { font-size: 2.5rem; margin-bottom: 16px; }
.section-header p { color: var(--color-text-secondary); max-width: 600px; margin: 0 auto; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 28px; font-weight: 500; font-size: 0.875rem;
  border-radius: var(--radius-md); cursor: pointer; transition: var(--transition);
  border: none; gap: 8px;
}

.btn-primary { background: var(--color-accent); color: #001E3C; font-weight: 600; } /* Lacivert üzerinde altın */
.btn-primary:hover { background: #d4b04a; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(201, 168, 76, 0.25); }
.btn-secondary { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-primary); }
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* =========================================
   4. HEADER & NAVIGATION (Şeffaf/Blurlu)
   ========================================= */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(var(--color-surface-rgb), 0.96);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: all 0.35s ease;
  padding: 14px 0;
  box-shadow: var(--shadow-sm);
}

header.scrolled {
  background: var(--color-primary-dark);
  border-bottom: 1px solid rgba(30, 58, 95, 0.6);
  padding: 12px 0;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
}

/* Header renk yönetimi */
header .logo, header .nav-links a, header .theme-toggle, header .mobile-menu-toggle {
  color: var(--color-text-primary); /* Light modda siyah, Dark modda beyaz olur */
  transition: color 0.4s ease;
}

/* Scrolled halinde koyu arka plan olduğu için yazılar kesinlikle beyaz olsun */
header.scrolled .logo, 
header.scrolled .nav-links a, 
header.scrolled .theme-toggle, 
header.scrolled .mobile-menu-toggle {
  color: #F0F4F8 !important; 
}

header.scrolled .nav-links a:hover { color: var(--color-accent); }

.nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
.logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-right: 32px;
}
.logo span { color: var(--color-accent); }

.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--color-accent); }

.header-actions { display: flex; align-items: center; gap: 16px; margin-left: auto; }
.theme-toggle { background: none; border: none; font-size: 1.25rem; cursor: pointer; padding: 8px; }
.mobile-menu-toggle { display: none; background: none; border: none; font-size: 1.8rem; cursor: pointer; }

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
  background: var(--color-primary-dark); z-index: 1001;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  transform: translateY(-100%); transition: transform 0.4s ease-in-out;
}
.mobile-menu-overlay.active { transform: translateY(0); }
.mobile-nav { display: flex; flex-direction: column; gap: 32px; text-align: center; }
.mobile-nav a { font-size: 1.75rem; font-family: var(--font-display); font-weight: 700; color: #F0F4F8; }
.mobile-nav a:hover { color: var(--color-accent); }
.close-menu-btn { position: absolute; top: 24px; right: 24px; font-size: 2rem; background: none; border: none; color: #F0F4F8; cursor: pointer; }

/* =========================================
   5. HERO SECTIONS
   ========================================= */
.hero {
  padding: 160px 0 80px; min-height: 80vh;
  display: flex; align-items: center; justify-content: center;
}
.hero-content { text-align: center; max-width: 900px; width: 100%; margin: 0 auto; }
.hero h1 { font-size: 3.75rem; margin-bottom: 24px; }
.hero p { font-size: 1.125rem; color: var(--color-text-secondary); max-width: 600px; margin: 0 auto 40px; }
.hero-actions { display: flex; justify-content: center; gap: 16px; }

/* Inner Page Hero */
.page-hero { 
  padding: 160px 0 80px; text-align: center; 
  background: linear-gradient(to bottom, rgba(10, 25, 41, 0.05), transparent); 
  border-bottom: 1px solid var(--color-border); 
}
[data-theme="dark"] .page-hero {
  background: linear-gradient(to bottom, rgba(0, 30, 60, 0.5), transparent);
}
.page-hero h1 { font-size: 3rem; margin-bottom: 16px; }
.page-hero p { font-size: 1.125rem; color: var(--color-text-secondary); max-width: 600px; margin: 0 auto; }

/* =========================================
   6. CORE COMPONENTS
   ========================================= */
/* Kurumsal güven şeridi */
.trust-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 28px 40px;
  padding: 20px 24px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.trust-bar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}
.trust-bar-item i {
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}
[data-theme="dark"] .trust-bar-item i { color: var(--color-accent); }

.trusted-by { padding: 40px 0; border-block: 1px solid var(--color-border); overflow: hidden; background: var(--color-bg); }
.trusted-by p {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}
.marquee-wrapper { width: 100%; overflow: hidden; }
.marquee { display: flex; width: max-content; animation: scroll 30s linear infinite; gap: 64px; }
.marquee-item {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  opacity: 0.75;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.02em;
}
@keyframes scroll { to { transform: translateX(calc(-50% - 32px)); } }

.stats { padding: 80px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; text-align: center; }
.stat-item {
  padding: 28px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.stat-item h3 { font-size: 2.5rem; color: var(--color-primary-dark); margin-bottom: 8px; }
[data-theme="dark"] .stat-item h3 { color: var(--color-accent); }
.stat-item p { color: var(--color-text-secondary); font-size: 0.875rem; }

.services-preview { padding: 96px 0; background: var(--color-surface); }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; }
.service-card { padding: 40px; border: 1px solid var(--color-border); border-radius: var(--radius-lg); transition: var(--transition); background: var(--color-surface); }
.service-card:hover { transform: translateY(-5px); border-color: var(--color-accent); box-shadow: var(--shadow-lg); }
.service-icon { font-size: 2.5rem; color: var(--color-accent); margin-bottom: 24px; }

.tech-stack { padding: 80px 0; background: var(--color-surface); border-top: 1px solid var(--color-border); }
.tech-grid { 
  display: flex; 
  flex-wrap: wrap; 
  justify-content: center; 
  gap: 24px; 
}

.tech-item { 
  display: flex; 
  flex-direction: column; 
  align-items: center; 
  gap: 12px; 
  font-weight: 500; 
  font-size: 0.875rem; 
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 24px;
  border-radius: var(--radius-md);
  min-width: 140px;
  transition: var(--transition);
}
.tech-item i { 
  font-size: 2.5rem; 
  color: var(--color-accent); /* İkonlar altın rengi olsun */
  transition: var(--transition);
}
.tech-item:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}
.tech-item:hover i {
  transform: scale(1.1);
}

/* =========================================
   7. PORTFOLIO & CASE STUDIES
   ========================================= */
.portfolio { padding: 96px 0; }
.portfolio-filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-bottom: 48px; }
.filter-btn { background: transparent; border: 1px solid var(--color-border); padding: 10px 24px; border-radius: 30px; font-size: 0.875rem; color: var(--color-text-secondary); cursor: pointer; transition: var(--transition); }
.filter-btn.active, .filter-btn:hover { background: var(--color-accent); color: #001E3C; border-color: var(--color-accent); font-weight: 600; }

.portfolio-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 40px; }
.portfolio-card { 
  background: var(--color-surface); 
  border: 1px solid var(--color-border); 
  border-radius: var(--radius-lg); 
  overflow: hidden; 
  transition: var(--transition); 
  display: flex; 
  flex-direction: column; /* Kartı dikey bir flex kutusu yapıyoruz */
  height: 100%; /* Grid içinde yüksekliğin tamamını kaplasın */
}
.portfolio-card:hover { border-color: var(--color-primary-light); box-shadow: var(--shadow-lg); }

.portfolio-img {
  height: 240px;
  background: var(--color-border);
  position: relative;
  overflow: hidden;
}
.portfolio-img img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center;
  transition: transform 0.5s ease;
}
.portfolio-card:hover .portfolio-img img { transform: scale(1.05); }
.portfolio-img span { position: absolute; top: 16px; left: 16px; background: var(--color-primary-dark); color: #F0F4F8; padding: 4px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; z-index: 2; }

.portfolio-content { 
  padding: 32px; /* Alt boşluk tekrar 32px olarak ayarlandı */
  flex: 1; 
  display: flex; 
  flex-direction: column; 
}

.portfolio-meta { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--color-border); }
.meta-item { display: flex; align-items: flex-start; gap: 8px; font-size: 0.875rem; }
.meta-item i { color: var(--color-accent); margin-top: 4px; }

.portfolio-result { 
  background: rgba(22, 163, 74, 0.1); 
  border-left: 3px solid var(--color-success); 
  padding: 16px; 
  border-radius: 4px; 
  margin-top: 16px; 
  margin-bottom: 24px; /* EKLENDİ: Yeşil kutu ile kartın altı/buton arasına nefes alanı koyduk */
}
.portfolio-result p { font-size: 0.875rem; color: var(--color-text-primary); font-weight: 500; margin: 0; }
.portfolio-result span { color: var(--color-success); font-weight: 700; }

/* Canlı Demo Butonunu şık ve hizalı yapma */
.portfolio-content > a.btn,
.portfolio-content > .btn.demo-open-btn {
  margin-top: auto;
  width: fit-content;
  align-self: center;
  margin-bottom: 0;
  font-family: inherit;
  cursor: pointer;
}

.portfolio-card.hide { display: none; }
.portfolio-card.show { animation: fadeIn 0.5s ease; }
@keyframes fadeIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }

.case-study-card {
  display: grid; 
  grid-template-columns: 1fr 1fr; /* ÖNCEDEN 1fr 2fr idi, 1fr 1fr yaparak dengeledik */
  gap: 48px; 
  align-items: center;
  background: var(--color-surface); 
  padding: 48px; 
  border-radius: var(--radius-lg); 
  margin-bottom: 48px; 
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.case-study-card:hover { 
  box-shadow: var(--shadow-lg); 
  border-color: var(--color-primary-light);
}

/* Vaka Örnekleri İçindeki İstatistik Kutuları İçin YENİ CLASS - PREMIUM GÖRÜNÜM */
.case-study-stat {
  background: rgba(201, 168, 76, 0.08); /* Altın renginin çok açık hali */
  color: var(--color-text-primary); 
  padding: 48px 32px; 
  text-align: center; 
  border-radius: var(--radius-lg);
  border: 1px solid rgba(201, 168, 76, 0.25); /* Hafif altın kenarlık */
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* Arkadaki hafif ışık efekti */
.case-study-stat::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(201, 168, 76, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.case-study-stat span { 
  font-size: 4.5rem; 
  font-family: var(--font-display); 
  font-weight: 700; 
  color: var(--color-accent); /* Sayılar tam altın rengi */
  display: block;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
  line-height: 1;
}

.case-study-stat p { 
  margin-top: 0; 
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  position: relative;
  z-index: 1;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* =========================================
   8. PROCESS & ABOUT & FAQ
   ========================================= */
.process-grid { display: flex; flex-direction: column; gap: 32px; max-width: 900px; margin: 0 auto; }
.process-card { display: flex; gap: 32px; background: var(--color-surface); padding: 48px; border-radius: var(--radius-lg); border: 1px solid var(--color-border); position: relative; overflow: hidden; transition: var(--transition); }
.process-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-md); transform: translateX(8px); }
.process-step-num { font-size: 4rem; font-family: var(--font-display); font-weight: 700; color: var(--color-accent); line-height: 1; opacity: 0.2; position: absolute; right: 32px; top: -16px; }
.process-icon { width: 64px; height: 64px; background: var(--color-bg); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 2rem; color: var(--color-accent); flex-shrink: 0; }
.process-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.process-list li { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; }
.process-list i { color: var(--color-success); }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding: 96px 0; }
.about-image { border-radius: var(--radius-lg); overflow: hidden; background: var(--color-primary-dark); aspect-ratio: 4/3; min-height: 320px; }
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 32px; margin-top: 48px; }
.value-card { background: var(--color-surface); padding: 32px; border-radius: var(--radius-lg); border: 1px solid var(--color-border); transition: var(--transition); }
.value-card:hover { transform: translateY(-5px); border-color: var(--color-accent); }
.value-icon { font-size: 2.5rem; color: var(--color-accent); margin-bottom: 16px; display: block; }

.faq-container { max-width: 800px; margin: 0 auto; }
.accordion-item { border-bottom: 1px solid var(--color-border); }
.accordion-header { width: 100%; padding: 24px 0; background: transparent; border: none; display: flex; justify-content: space-between; align-items: center; font-family: var(--font-body); font-size: 1.125rem; font-weight: 600; color: var(--color-text-primary); cursor: pointer; text-align: left; }
.accordion-icon { font-size: 1.25rem; transition: transform 0.3s ease; color: var(--color-accent); }
.accordion-item.active .accordion-icon { transform: rotate(45deg); }
.accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.35s ease-out; }
.accordion-body { padding-bottom: 24px; color: var(--color-text-secondary); line-height: 1.6; }

/* =========================================
   9. FORMS & CONTACT & LEGAL
   ========================================= */
.contact-layout { padding: 80px 0; display: grid; grid-template-columns: 1.5fr 1fr; gap: 64px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.form-group { margin-bottom: 24px; }
.form-label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.875rem; }
.form-control { width: 100%; padding: 14px 16px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text-primary); font-family: var(--font-body); font-size: 1rem; transition: var(--transition); }
.form-control:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.15); }
textarea.form-control { min-height: 120px; resize: vertical; }

.contact-info-card { 
  background: var(--color-surface); /* Temaya göre otomatik renk değiştirecek */
  padding: 40px; 
  border-radius: var(--radius-lg); 
  border: 1px solid var(--color-border); 
  position: sticky; 
  top: 120px; 
  color: var(--color-text-primary); /* Yazılar temaya göre renk alacak */
}
.contact-list li { display: flex; gap: 16px; margin-bottom: 24px; color: var(--color-text-secondary); }
.contact-list i { color: var(--color-accent); font-size: 1.5rem; }
.contact-list a { color: var(--color-text-primary); transition: 0.3s; }
.contact-list a:hover { color: var(--color-accent); }

.legal-content { max-width: 800px; margin: 0 auto; padding: 80px 0; color: var(--color-text-secondary); }
.contact-info-card h3 { 
  font-family: var(--font-display); 
  font-size: 1.5rem; 
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.contact-hours-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.contact-hours-row strong {
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0;
}
.hours-badge {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-primary-dark);
  letter-spacing: 0.06em;
}
[data-theme="dark"] .hours-badge {
  color: var(--color-accent);
}
.legal-content p, .legal-content ul { margin-bottom: 24px; line-height: 1.8; }
.legal-content a { color: var(--color-accent); text-decoration: underline; }

/* =========================================
   10. FOOTER & FLOATING BANNERS
   ========================================= */
footer { 
  background: var(--color-footer-bg); /* Yeni eklediğimiz değişkeni kullanıyoruz */
  color: var(--color-text-secondary); 
  padding: 80px 0 32px; 
  font-size: 0.875rem; 
  border-top: 1px solid var(--color-border);
}

/* Footer Logo - Tema değişince renkleri uyumlu olsun (YENİ EKLENDİ) */
.footer-brand .logo { 
  color: var(--color-footer-heading); /* Açık temada koyu, koyu temanda beyaz olur */
  transition: color var(--transition);
}
.footer-brand .logo span { 
  color: var(--color-accent); /* Nokta her zaman altın rengi */
}

.footer-brand p { color: var(--color-text-secondary); margin-top: 16px; }

/* Yeni Asimetrik ve Kompakt Footer Grid */
.footer-grid { 
  display: flex; 
  justify-content: space-between;
  gap: 64px; 
  margin-bottom: 48px;
}

.footer-brand { 
  flex: 0 0 32%; /* Sol taraf marka için %32 alan */
}

.footer-links-group {
  flex: 1; /* Sağ taraf linkler için kalan %68 alan */
  display: grid; 
  grid-template-columns: repeat(3, 1fr); /* Sağ taraf 3 sütun olsun */
  gap: 32px;
}

/* Footer başlıkları arası mesafeyi biraz sıkıştıralım */
.footer-title { font-size: 0.95rem; margin-bottom: 16px; font-family: var(--font-display); color: var(--color-footer-heading); letter-spacing: 0.02em; text-transform: uppercase; }
.footer-links li { margin-bottom: 8px; } /* Linkler arası boşluk azaltıldı */
.footer-links a, .footer-contact li { color: var(--color-text-secondary); }
.footer-links a:hover { color: var(--color-accent); }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 12px; } /* İletişim arası boşluk azaltıldı */
.footer-contact i { color: var(--color-accent); font-size: 1.1rem; }

/* Alt şerit */
.footer-bottom { 
  padding-top: 24px; 
  border-top: 1px solid var(--color-border); 
  display: flex; 
  justify-content: space-between; 
  align-items: center;
  color: var(--color-text-secondary); 
  font-size: 0.8rem; /* Yazı boyutunu biraz küçülttük */
  flex-wrap: wrap;
  gap: 12px;
}
.footer-legal { display: flex; gap: 16px; }
.footer-legal a { font-size: 0.8rem; }

.kvkk-banner { position: fixed; bottom: 24px; left: 24px; right: 24px; background: var(--color-surface); padding: 24px; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 1px solid var(--color-border); display: flex; justify-content: space-between; align-items: center; z-index: 9999; gap: 24px; transform: translateY(150%); transition: transform 0.5s ease; }
.kvkk-banner.show { transform: translateY(0); }

.whatsapp-fab { position: fixed; bottom: 24px; right: 24px; background: #25D366; color: #fff; width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.75rem; box-shadow: var(--shadow-lg); z-index: 9998; transition: transform 0.3s; }
.whatsapp-fab:hover { transform: scale(1.1); color: #fff; }

#back-to-top {
  position: fixed; bottom: 90px; right: 24px;
  width: 48px; height: 48px; background: var(--color-primary-dark); color: #F0F4F8;
  border: 1px solid var(--color-accent); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; cursor: pointer; opacity: 0; visibility: hidden;
  transition: all 0.3s ease; z-index: 9997; box-shadow: var(--shadow-md);
}
#back-to-top.visible { opacity: 1; visibility: visible; }
#back-to-top:hover { background: var(--color-accent); color: #001E3C; transform: translateY(-3px); }

/* =========================================
   11. PROFESSIONAL SCROLL ANIMATIONS
   ========================================= */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(32px); /* Varsayılan yukarı kayma efekti */
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* Varsayılan efekt (Aşağıdan Yukarı) */
.fade-up { transform: translateY(40px); }

/* Yön Efektleri */
.fade-down { transform: translateY(-40px); }
.fade-left { transform: translateX(-40px); }
.fade-right { transform: translateX(40px); }
.zoom-in { transform: scale(0.9); }

/* Efekt Tetiklendiğinde (JS ile is-visible eklenir) */
.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* Gecikme Süreleri (Kartlar ve listeler için ardışık efekt) */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* =========================================
   12. RESPONSIVE / MEDIA QUERIES
   ========================================= */
/* Tablet */
@media (max-width: 1024px) {
  .hero h1 { font-size: 3rem; }
  .footer-grid { flex-direction: column; gap: 40px; }
  .footer-brand { flex: auto; }
  .footer-links-group { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .contact-info-card { position: static; }
}

/* Mobile */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .hero h1 { font-size: 2.2rem; }
  .page-hero h1 { font-size: 2rem; }
  .portfolio-grid, .services-grid, .form-grid { grid-template-columns: 1fr; gap: 24px; }
  .case-study-card { grid-template-columns: 1fr; padding: 24px; gap: 24px; }
  .process-card { flex-direction: column; padding: 24px; gap: 24px; }
  .process-list { grid-template-columns: 1fr; }
  .process-step-num { top: auto; bottom: -10px; right: 16px; font-size: 3rem; }
  .footer-links-group { grid-template-columns: 1fr 1fr; gap: 24px; } /* Mobilde 2 sütun */
  .nav-links { display: none !important; }
  .hide-on-mobile { display: none !important; }
  .mobile-menu-toggle { display: block !important; margin-left: 10px; }
  .kvkk-banner { flex-direction: column; text-align: center; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 12px; }
  .footer-legal { justify-content: center; flex-wrap: wrap; }
  .whatsapp-fab { bottom: 20px; right: 20px; width: 50px; height: 50px; }
  #back-to-top { bottom: 80px; right: 20px; width: 44px; height: 44px; }
}

/* Desktop */
@media (min-width: 769px) {
  .nav-links { display: flex !important; }
  .mobile-menu-toggle { display: none !important; }
  .mobile-menu-overlay { display: none !important; }
}

/* =========================================
   13. WELCOME GATE (KARŞILAMA EKRANI)
   ========================================= */
#welcome-gate {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 30, 60, 0.95); /* Lacivert tema ile uyumlu karanlık */
  backdrop-filter: blur(10px); z-index: 99999;
  display: flex; align-items: center; justify-content: center;
  opacity: 1; transition: opacity 0.5s ease;
}
#welcome-gate.hidden { opacity: 0; pointer-events: none; }

.gate-content { text-align: center; color: #F0F4F8; max-width: 600px; padding: 0 20px; }
.gate-step { display: none; animation: fadeInUp 0.5s ease forwards; }
.gate-step.active { display: block; }
.gate-content h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 16px; line-height: 1.35; letter-spacing: -0.02em; }
.gate-content .gate-sub { color: #94A3B8; font-size: 1rem; margin-bottom: 32px; line-height: 1.6; }
@media (max-width: 768px) { .gate-content h2 { font-size: 1.8rem; } }

.gate-buttons { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.gate-btn {
  padding: 14px 28px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.25s;
  border: 1px solid transparent;
  letter-spacing: 0.02em;
}
.gate-btn-yes { background: var(--color-accent); color: #001E3C; }
.gate-btn-yes:hover { background: #d4b04a; }
.gate-btn-no { background: transparent; border-color: #334155; color: #94A3B8; }
.gate-btn-no:hover { border-color: #64748B; color: #F0F4F8; }

.loader { margin-top: 30px; font-size: 1rem; color: var(--color-accent); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* =========================================
   DEMO PANEL (Portföy - iframe penceresi)
   ========================================= */
.demo-panel {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.demo-panel.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.demo-panel-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 10, 25, 0.75);
  backdrop-filter: blur(4px);
}

.demo-panel-window {
  position: relative;
  width: min(1100px, 100%);
  height: min(85vh, 800px);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.94) translateY(16px);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.demo-panel.is-open .demo-panel-window {
  transform: scale(1) translateY(0);
}

.demo-panel-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: #0A1929;
  color: #F0F4F8;
  border-bottom: 1px solid #1E3A5F;
}

.demo-panel-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.demo-panel-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
}

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

.demo-panel-project {
  font-size: 0.8rem;
  color: #94A3B8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.demo-panel-close {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--color-accent);
  color: #001E3C;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.demo-panel-close:hover {
  background: #e0b95c;
  transform: translateY(-1px);
}

.demo-panel-frame-wrap {
  flex: 1;
  min-height: 0;
  background: #fff;
}

.demo-panel-frame-wrap iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

body.demo-panel-open {
  overflow: hidden;
}

@media (max-width: 768px) {
  .demo-panel { padding: 0; align-items: stretch; }
  .demo-panel-window {
    width: 100%;
    height: 100%;
    max-height: none;
    border-radius: 0;
  }
}