/* =========================
   CSS Variables
   ========================= */
:root {
  --primary-color: #003366;
  --primary-light: #004080;
  --primary-dark: #002244;
  --background-color: #ffffff;
  --text-black: #000000;
  --text-dark-gray: #111111;
  --text-medium-gray: #222222;
  --text-gray: #555555;
  --text-light-gray: #666666;
  --border-color: #e5e5e5;
  --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
  --border-radius: 8px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
}

/* =========================
   Reset & Base
   ========================= */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-gray);
  background-color: var(--background-color);
  font-display: swap;
}

/* =========================
   Typography
   ========================= */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}
h1 { color: var(--text-black); font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { color: var(--text-black); font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { color: var(--text-dark-gray); font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { color: var(--text-medium-gray); font-size: 1.125rem; }
p  { margin-bottom: var(--spacing-sm); color: var(--text-gray); }
a  { color: var(--primary-color); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }

/* =========================
   Layout
   ========================= */
.container { max-width: 1280px; margin: 0 auto; padding: 0 var(--spacing-sm); }
.section { padding: var(--spacing-xxl) 0; }
.section-gray { background-color: #f8f9fa; }
.section-title { text-align: center; margin-bottom: var(--spacing-xl); position: relative; }
.section-title::after{
  content:''; position:absolute; bottom:-10px; left:50%; transform:translateX(-50%);
  width:60px; height:3px; background-color:var(--primary-color); border-radius:2px;
}

/* =========================
   Header (custom ATC)
   ========================= */
.atc-nav { position: sticky; top: 0; background:#fff; z-index:1030; box-shadow:0 1px 0 rgba(0,0,0,.06); }
.atc-nav-container { max-width:1200px; margin:0 auto; padding:0 16px; height:80px; display:flex; align-items:center; justify-content:space-between; }
.atc-nav-brand .logo { display:block; height:auto; }
.atc-nav-menu { display:flex; align-items:center; gap:24px; }
.atc-nav-link, .atc-lang-link, .atc-lang-active { color:#0f172a; text-decoration:none; font-weight:500; }
.atc-nav-link:hover { text-decoration:underline; }
.atc-nav-link.active { color: var(--primary-color); font-weight:600; }
.atc-lang-divider { opacity:.5; margin:0 .25rem; }

/* =========================
   Hero (optional section)
   ========================= */
.hero{
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color:#fff; padding: calc(80px + var(--spacing-xxl)) 0 var(--spacing-xxl); min-height:70vh;
  display:flex; align-items:center;
}
.hero-content{ text-align:center; }
.hero-title{ color:#fff; margin-bottom:var(--spacing-md); text-shadow:0 2px 4px rgba(0,0,0,.1); }
.hero-subtitle{
  font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  margin-bottom: var(--spacing-xl);
  color: rgba(255,255,255,.9);
  max-width: 600px; margin-inline:auto;
}
.hero-cta{ display:flex; gap:var(--spacing-md); justify-content:center; flex-wrap:wrap; }

/* =========================
   Buttons
   ========================= */
.btn{
  display:inline-block; padding:var(--spacing-md) var(--spacing-xl);
  border-radius:var(--border-radius); font-weight:600; text-align:center;
  transition:var(--transition); border:2px solid transparent; cursor:pointer;
  text-decoration:none; font-size:1rem;
}
.btn-primary{ background:#fff; color:var(--primary-color); border-color:#fff; }
.btn-primary:hover{ background:transparent; color:#fff; border-color:#fff; transform:translateY(-2px); box-shadow:var(--shadow-medium); }
.btn-secondary{ background:transparent; color:#fff; border-color:#fff; }
.btn-secondary:hover{ background:#fff; color:var(--primary-color); transform:translateY(-2px); box-shadow:var(--shadow-medium); }
.btn-full{ width:100%; }

/* =========================
   About
   ========================= */
.about-content{ max-width:800px; margin:0 auto; text-align:center; }
.about-text{ font-size:1.125rem; margin-bottom:var(--spacing-xl); line-height:1.7; }
.technopark-badge{
  display:flex; align-items:center; justify-content:center; gap:var(--spacing-md);
  background:var(--primary-color); color:#fff; padding:var(--spacing-md) var(--spacing-xl);
  border-radius:var(--border-radius); max-width:400px; margin:0 auto;
}
.badge-icon{ font-size:2rem; }
.badge-text{ text-align:left; }
.badge-text strong{ display:block; font-weight:600; }
.badge-text span{ font-size:.875rem; opacity:.9; }

/* =========================
   Services / Why
   ========================= */
.services-grid{
  display:grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap:var(--spacing-lg); margin-top:var(--spacing-xl);
}
.service-card{
  background:#fff; padding:var(--spacing-xl); border-radius:var(--border-radius);
  box-shadow:var(--shadow-light); transition:var(--transition); border:1px solid var(--border-color);
}
.service-card:hover{ transform:translateY(-5px); box-shadow:var(--shadow-medium); }
.service-icon{ font-size:2.5rem; margin-bottom:var(--spacing-md); display:block; }
.service-title{ margin-bottom:var(--spacing-sm); }
.service-description{ line-height:1.6; }

.why-grid{
  display:grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap:var(--spacing-lg); margin-top:var(--spacing-xl);
}
.why-item{ text-align:center; padding:var(--spacing-lg); }
.why-icon{ font-size:3rem; margin-bottom:var(--spacing-md); display:block; }
.why-title{ color:var(--text-dark-gray); }

/* =========================
   Partners (generic grid)
   ========================= */
.partners-grid{
  display:grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap:var(--spacing-xl); margin-top:var(--spacing-xl);
}
.partner-item{
  text-align:center; padding:var(--spacing-xl); background:#fff; border-radius:var(--border-radius);
  box-shadow:var(--shadow-light); transition:var(--transition);
}
.partner-item:hover{ transform:translateY(-3px); box-shadow:var(--shadow-medium); }
.partner-logo{ margin-bottom:var(--spacing-md); height:60px; display:flex; align-items:center; justify-content:center; }
.partner-logo img{ max-height:80px; width:auto; filter:grayscale(100%); transition:var(--transition); }
.partner-item:hover .partner-logo img{ filter:grayscale(0%); }
.partner-description{ font-size:.95rem; line-height:1.5; }

/* =========================
   Partners (Bootstrap row/col)
   ========================= */
.partners-logos .col{
  display:flex; align-items:center; justify-content:center; height:90px;
}
.partners-logos .col img{
  max-height:70px; width:auto; object-fit:contain; display:block;
}
/* 3. logo biraz aşağı */
@media (min-width:768px){
  .partners-logos .col:nth-child(3) img{ transform: translateY(14px); }
}

/* =========================
   News
   ========================= */
.news-list{ max-width:800px; margin:0 auto; }
.news-item{
  display:flex; gap:var(--spacing-lg); padding:var(--spacing-lg);
  border-bottom:1px solid var(--border-color); transition:var(--transition);
}
.news-item:hover{ background:#f8f9fa; border-radius:var(--border-radius); }
.news-item:last-child{ border-bottom:none; }
.news-date{
  background:var(--primary-color); color:#fff; padding:var(--spacing-xs) var(--spacing-sm);
  border-radius:var(--border-radius); font-weight:600; font-size:.875rem; height:fit-content; min-width:100px; text-align:center;
}
.news-content{ flex:1; }
.news-title{ margin-bottom:var(--spacing-xs); font-size:1.125rem; }
.news-excerpt{ margin-bottom:var(--spacing-sm); font-size:.95rem; }
.news-link{ font-size:.875rem; font-weight:500; color:var(--primary-color); }
.news-link:hover{ text-decoration:underline; }

/* =========================
   Contact
   ========================= */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:var(--spacing-xxl); margin-top:var(--spacing-xl); }
.contact-info{ display:flex; flex-direction:column; gap:var(--spacing-lg); }
.contact-item{ display:flex; align-items:flex-start; gap:var(--spacing-md); }
.contact-icon{ font-size:1.5rem; margin-top:2px; }
.contact-label{ font-weight:600; color:var(--text-dark-gray); margin-bottom:var(--spacing-xs); }
.contact-value{ color:var(--text-gray); }
.contact-link:hover{ color:var(--primary-color); }
.contact-placeholder{ color:var(--text-light-gray); font-style:italic; }
.map-container{ margin-top:var(--spacing-lg); border-radius:var(--border-radius); overflow:hidden; box-shadow:var(--shadow-light); }

/* Contact Form */
.contact-form{
  background:#fff; padding:var(--spacing-xl); border-radius:var(--border-radius); box-shadow:var(--shadow-light);
}
.form-group{ margin-bottom:var(--spacing-md); }
.form-label{ display:block; margin-bottom:var(--spacing-xs); font-weight:500; color:var(--text-dark-gray); }
.form-input{
  width:100%; padding:var(--spacing-sm); border:1px solid var(--border-color); border-radius:var(--border-radius);
  font-family:inherit; font-size:1rem; transition:var(--transition);
}
.form-input:focus{ outline:none; border-color:var(--primary-color); box-shadow:0 0 0 3px rgba(0,51,102,.1); }
.checkbox-label{ display:flex; align-items:flex-start; gap:var(--spacing-xs); cursor:pointer; }
.checkbox-label input[type="checkbox"]{ margin-top:2px; }
.checkbox-text{ font-size:.875rem; line-height:1.4; }
.form-note{ margin-top:var(--spacing-sm); font-size:.875rem; color:var(--text-light-gray); text-align:center; }

/* =========================
   Footer
   ========================= */
.footer{ background:var(--text-dark-gray); color:#fff; padding:var(--spacing-xl) 0 var(--spacing-lg); }
.footer-content{
  display:grid; grid-template-columns:1fr 1fr; gap:var(--spacing-xl); margin-bottom:var(--spacing-lg);
}
.footer-brand{ display:flex; flex-direction:column; gap:var(--spacing-sm); align-items:flex-start; text-align:left; justify-self:start; }
.footer-logo{ height:80px; width:auto; object-fit:contain; display:block; margin:0; }
.footer-slogan{ color:rgba(250,250,250,.8); font-size:.95rem; }
.footer-contact{ display:flex; flex-direction:column; gap:var(--spacing-sm); }
.footer-title{ color:#fff; margin-bottom:var(--spacing-sm); }
.footer-item{ color:rgba(255,255,255,.8); font-size:.95rem; display:flex; align-items:center; gap:8px; margin:4px 0; }
.social-links{ display:flex; gap:var(--spacing-sm); margin-top:var(--spacing-sm); }
.social-link{
  display:inline-block; font-size:1.25rem; padding:var(--spacing-xs);
  border-radius:50%; background:rgba(255,255,255,.1); transition:var(--transition);
}
.social-link:hover{ background:var(--primary-color); transform:translateY(-2px); }
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1); padding-top:var(--spacing-lg);
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:var(--spacing-sm);
}
.footer-copyright{ color:rgba(255,255,255,.7); font-size:.875rem; }
.footer-links{ display:flex; gap:var(--spacing-lg); }
.footer-link{ color:rgba(255,255,255,.7); font-size:.875rem; transition:var(--transition); }
.footer-link:hover{ color:#fff; }

/* =========================
   Drawer (Mobile Menu)
   ========================= */
.atc-actions{ display:none; }
.atc-drawer{
  position:fixed; top:0; left:0; height:100vh; width:78vw; max-width:360px;
  background:#fff; box-shadow: 2px 0 16px rgba(0,0,0,.18); transform:translateX(-100%);
  transition: transform .25s ease; z-index:1400; padding:16px 12px;
}
.atc-drawer.open{ transform:translateX(0); }
.atc-drawer-backdrop{ position:fixed; inset:0; background:rgba(0,0,0,.4); display:none; z-index:1390; }
.atc-drawer-backdrop.show{ display:block; }
.atc-drawer-header{ display:flex; align-items:center; justify-content:space-between; padding:4px 8px 12px; border-bottom:1px solid #eee; }
.atc-drawer-close{ background:none; border:0; font-size:1.25rem; cursor:pointer; }
.atc-drawer-menu{ display:flex; flex-direction:column; padding:12px 8px; gap:14px; }
.atc-drawer-menu a{ color:#0f172a; text-decoration:none; font-weight:500; }
.atc-drawer-menu a:hover{ text-decoration:underline; }
.atc-drawer-lang{ margin-top:8px; font-weight:600; }

/* =========================
   Partners page (responsive)
   ========================= */
.partners-page { padding-top: calc(80px + 16px); }
.partners-page .partners-grid{ display:grid; grid-template-columns:1fr; gap:20px; }
.partners-page .partner-item{
  width:100%; padding:16px; border:1px solid var(--border-color); border-radius:var(--border-radius);
  background:#fff; box-shadow:var(--shadow-light); text-align:center;
}
.partners-page .partner-logo{ height:64px; display:flex; align-items:center; justify-content:center; margin-bottom:12px; }
.partners-page .partner-item .partner-logo img{
  height:56px !important; width:auto !important; max-width:100% !important; object-fit:contain !important; display:block;
}
@media (min-width:600px){
  .partners-page .partners-grid{ grid-template-columns: repeat(2,1fr); gap:24px; }
  .partners-page .partner-logo{ height:72px; }
  .partners-page .partner-item .partner-logo img{ height:64px !important; }
}
@media (min-width:992px){
  .partners-page .partners-grid{ grid-template-columns: repeat(3,1fr); gap:28px; }
  .partners-page .partner-logo{ height:80px; }
  .partners-page .partner-item .partner-logo img{ height:70px !important; }
}

/* =========================
   Carousel (image height)
   ========================= */
#mainCarousel .carousel-item img { height: 420px; object-fit: cover; width:100%; }
@media (max-width: 768px){ #mainCarousel .carousel-item img { height: 320px; } }
@media (max-width: 480px){ #mainCarousel .carousel-item img { height: 260px; } }



/* =========================
   Responsive (global)
   ========================= */
@media (max-width: 1024px){
  .container{ padding:0 var(--spacing-md); }
  .services-grid{ grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
  .contact-grid{ grid-template-columns:1fr; gap:var(--spacing-xl); }
}
@media (max-width: 768px){
  .atc-nav-menu{ display:none; }
  .atc-actions{ display:flex; align-items:center; gap:8px; }
  .atc-menu-toggle{ background:none; border:0; font-size:1.75rem; line-height:1; cursor:pointer; }

  .nav-menu{ gap:var(--spacing-md); }
  .nav-link{ font-size:.9rem; }

  .hero{ padding: calc(70px + var(--spacing-xl)) 0 var(--spacing-xl); text-align:center; }
  .hero-cta{ flex-direction:column; align-items:center; }
  .btn{ width:100%; max-width:300px; }

  .services-grid{ grid-template-columns:1fr; }
  .why-grid{ grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
  .partners-grid{ grid-template-columns:1fr; }

  .news-item{ flex-direction:column; gap:var(--spacing-sm); }
  .news-date{ align-self:flex-start; min-width:auto; }

  .footer-content{ grid-template-columns:1fr; gap:20px; text-align:left; align-items:flex-start; }
  .footer-brand, .footer-contact{ align-items:flex-start; text-align:left; justify-self:start; }
  .footer-logo{ height:56px; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; gap:12px; text-align:left; }
}
@media (max-width: 360px){
  .container{ padding:0 var(--spacing-sm); }
  .nav-container{ padding:0 var(--spacing-sm); }
  .nav-menu{ gap:var(--spacing-sm); }
  .nav-link{ font-size:.8rem; }
  .service-card{ padding:var(--spacing-lg); }
  .contact-form{ padding:var(--spacing-lg); }
}

/* =========================
   Focus Styles (A11y)
   ========================= */
.nav-link:focus, .btn:focus, .form-input:focus, .social-link:focus, .footer-link:focus{
  outline:2px solid var(--primary-color); outline-offset:2px;
}

/* =========================
   Print
   ========================= */
@media print{
  .header, .footer, .hero-cta, .contact-form{ display:none; }
  .hero{ background:none; color:var(--text-black); padding:var(--spacing-lg) 0; }
  .hero-title, .hero-subtitle{ color:var(--text-black); }
}