/* ============================================
   YILMAZ BETON İNŞAAT - Design System
   Premium Corporate Theme
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Playfair+Display:wght@400;500;600;700&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --primary: #1a3a5c;
  --primary-light: #2d5a8e;
  --primary-dark: #0f2640;
  --accent: #d4a853;
  --accent-light: #e8c97a;
  --accent-dark: #b8903d;
  --surface: #f8f9fb;
  --surface-alt: #eef1f5;
  --card: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --text-lighter: #94a3b8;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.1);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --transition: .35s cubic-bezier(.4,0,.2,1);
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Playfair Display', serif;
  --max-width: 1240px;
  --header-h: 80px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-body);color:var(--text);background:var(--surface);line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color var(--transition)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button,input,textarea,select{font:inherit;border:none;outline:none;background:none}

/* ---------- Utility ---------- */
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
.section{padding:100px 0}
.section-sm{padding:70px 0}
.text-center{text-align:center}
.text-accent{color:var(--accent)}
.bg-primary{background:var(--primary);color:#fff}
.bg-surface{background:var(--surface)}
.bg-white{background:#fff}

/* ---------- Typography ---------- */
.section-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.8rem;font-weight:600;letter-spacing:2px;text-transform:uppercase;
  color:var(--accent);margin-bottom:16px;
}
.section-label::before{content:'';width:28px;height:2px;background:var(--accent);border-radius:2px}
.section-title{
  font-family:var(--font-heading);font-size:clamp(1.8rem,4vw,2.8rem);
  font-weight:700;line-height:1.25;margin-bottom:20px;color:var(--primary-dark);
}
.bg-primary .section-title{color:#fff}
.section-desc{
  font-size:1.05rem;color:var(--text-light);max-width:640px;line-height:1.8;
}
.text-center .section-desc{margin:0 auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 32px;border-radius:var(--radius-sm);font-weight:600;
  font-size:.95rem;cursor:pointer;transition:all var(--transition);
  position:relative;overflow:hidden;
}
.btn-primary{
  background:var(--accent);color:var(--primary-dark);
  box-shadow:0 4px 15px rgba(212,168,83,.3);
}
.btn-primary:hover{background:var(--accent-light);transform:translateY(-2px);box-shadow:0 6px 25px rgba(212,168,83,.4)}
.btn-outline{
  border:2px solid var(--accent);color:var(--accent);background:transparent;
}
.btn-outline:hover{background:var(--accent);color:var(--primary-dark)}
.btn-white{background:#fff;color:var(--primary);box-shadow:var(--shadow-md)}
.btn-white:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}

/* ---------- Header ---------- */
.header{
  position:fixed;top:0;left:0;width:100%;z-index:1000;
  background:rgba(255,255,255,.92);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  transition:all var(--transition);height:var(--header-h);
}
.header.scrolled{box-shadow:var(--shadow-md);height:68px}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px;
}
.logo{display:flex;align-items:center;gap:12px}
.logo-icon{
  width:44px;height:44px;background:var(--primary);border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-heading);font-weight:800;color:var(--accent);font-size:1.2rem;
}
.logo-text{font-family:var(--font-heading);font-size:1.15rem;font-weight:700;color:var(--primary-dark)}
.logo-text span{display:block;font-family:var(--font-body);font-size:.7rem;font-weight:400;color:var(--text-light);letter-spacing:1px;text-transform:uppercase}

.nav{display:flex;align-items:center;gap:4px}
.nav a{
  padding:8px 18px;border-radius:var(--radius-sm);font-size:.9rem;
  font-weight:500;color:var(--text);transition:all var(--transition);
  position:relative;
}
.nav a:hover,.nav a.active{color:var(--primary);background:var(--surface-alt)}
.nav a.active::after{
  content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);
  width:20px;height:2px;background:var(--accent);border-radius:2px;
}
.nav .btn{margin-left:12px}

/* Dropdown */
.nav-item{position:relative}
.nav-item .dropdown{
  position:absolute;top:100%;left:0;min-width:240px;
  background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);
  padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all var(--transition);border:1px solid var(--border);
}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{
  display:block;padding:10px 16px;border-radius:var(--radius-sm);
  font-size:.88rem;color:var(--text);
}
.dropdown a:hover{background:var(--surface-alt);color:var(--primary)}

/* Mobile Menu */
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;z-index:1001}
.hamburger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ---------- Hero ---------- */
.hero{
  min-height:100vh;display:flex;align-items:center;
  background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);
  position:relative;overflow:hidden;padding-top:var(--header-h);
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(212,168,83,.06)" stroke-width=".5"/></svg>') repeat;
  background-size:120px;animation:heroBg 30s linear infinite;
}
@keyframes heroBg{to{background-position:120px 120px}}
.hero-content{position:relative;z-index:2;color:#fff}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.1);backdrop-filter:blur(10px);
  padding:8px 20px;border-radius:50px;font-size:.82rem;font-weight:500;
  margin-bottom:28px;border:1px solid rgba(255,255,255,.15);
}
.hero-badge .dot{width:8px;height:8px;background:var(--accent);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{
  font-family:var(--font-heading);font-size:clamp(2.2rem,5vw,3.6rem);
  font-weight:700;line-height:1.15;margin-bottom:24px;
}
.hero h1 .highlight{
  background:linear-gradient(135deg,var(--accent),var(--accent-light));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.hero p{font-size:1.1rem;line-height:1.8;color:rgba(255,255,255,.8);margin-bottom:36px;max-width:520px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px;
}
.hero-stat{
  background:rgba(255,255,255,.07);backdrop-filter:blur(10px);
  padding:24px;border-radius:var(--radius-md);border:1px solid rgba(255,255,255,.1);
  text-align:center;
}
.hero-stat .number{font-family:var(--font-heading);font-size:2rem;font-weight:700;color:var(--accent)}
.hero-stat .label{font-size:.8rem;color:rgba(255,255,255,.6);margin-top:4px}
.hero-visual{position:relative}
.hero-img-wrapper{
  position:relative;border-radius:var(--radius-xl);overflow:hidden;
  box-shadow:0 30px 80px rgba(0,0,0,.3);
}
.hero-img-wrapper img{width:100%;height:500px;object-fit:cover}
.hero-float-card{
  position:absolute;bottom:-20px;left:-20px;background:#fff;
  padding:20px 24px;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);
  display:flex;align-items:center;gap:14px;animation:float 4s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero-float-card .icon{
  width:48px;height:48px;background:linear-gradient(135deg,var(--accent),var(--accent-light));
  border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;
}
.hero-float-card .info h4{font-size:.9rem;font-weight:600;color:var(--primary-dark)}
.hero-float-card .info p{font-size:.78rem;color:var(--text-light);margin:0}

/* ---------- Services ---------- */
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:48px}
.service-card{
  background:var(--card);border-radius:var(--radius-md);padding:36px 28px;
  border:1px solid var(--border);transition:all var(--transition);
  position:relative;overflow:hidden;
}
.service-card::before{
  content:'';position:absolute;top:0;left:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-light));
  transform:scaleX(0);transform-origin:left;transition:transform var(--transition);
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.service-card:hover::before{transform:scaleX(1)}
.service-icon{
  width:56px;height:56px;background:linear-gradient(135deg,var(--primary),var(--primary-light));
  border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;color:#fff;margin-bottom:20px;
}
.service-card h3{font-size:1.15rem;font-weight:700;margin-bottom:12px;color:var(--primary-dark)}
.service-card p{font-size:.92rem;color:var(--text-light);line-height:1.7;margin-bottom:16px}
.service-link{
  display:inline-flex;align-items:center;gap:6px;font-size:.88rem;
  font-weight:600;color:var(--accent-dark);
}
.service-link:hover{color:var(--primary);gap:10px}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-img{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
}
.about-img img{width:100%;height:460px;object-fit:cover;border-radius:var(--radius-lg)}
.about-experience{
  position:absolute;bottom:24px;right:24px;background:var(--primary);color:#fff;
  padding:24px 28px;border-radius:var(--radius-md);text-align:center;
}
.about-experience .num{font-family:var(--font-heading);font-size:2.4rem;font-weight:700;color:var(--accent)}
.about-experience .txt{font-size:.8rem;opacity:.8}
.about-content .section-title{margin-top:8px}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:32px 0}
.about-feature{
  display:flex;align-items:start;gap:12px;padding:14px;
  background:var(--surface);border-radius:var(--radius-sm);
}
.about-feature .check{
  width:24px;height:24px;background:var(--accent);border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:.7rem;color:#fff;margin-top:2px;
}
.about-feature h4{font-size:.9rem;font-weight:600;color:var(--primary-dark)}
.about-feature p{font-size:.8rem;color:var(--text-light);margin-top:2px}

/* ---------- Products ---------- */
.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:48px}
.product-card{
  background:var(--card);border-radius:var(--radius-md);overflow:hidden;
  border:1px solid var(--border);transition:all var(--transition);
}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.product-card-img{height:200px;overflow:hidden;position:relative}
.product-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.product-card:hover .product-card-img img{transform:scale(1.05)}
.product-card-body{padding:24px}
.product-card-body h3{font-size:1.05rem;font-weight:700;margin-bottom:10px;color:var(--primary-dark)}
.product-card-body p{font-size:.88rem;color:var(--text-light);line-height:1.7}

/* ---------- CTA ---------- */
.cta{
  background:linear-gradient(135deg,var(--primary-dark),var(--primary));
  padding:80px 0;position:relative;overflow:hidden;
}
.cta::before{
  content:'';position:absolute;right:-100px;top:-100px;
  width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(212,168,83,.15),transparent 70%);
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;position:relative;z-index:2}
.cta h2{font-family:var(--font-heading);font-size:clamp(1.6rem,3vw,2.2rem);color:#fff;font-weight:700}
.cta p{color:rgba(255,255,255,.7);margin-top:12px;max-width:500px;font-size:1rem}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:48px}
.contact-info-cards{display:flex;flex-direction:column;gap:20px}
.contact-info-card{
  display:flex;align-items:start;gap:16px;padding:24px;
  background:var(--card);border-radius:var(--radius-md);border:1px solid var(--border);
  transition:all var(--transition);
}
.contact-info-card:hover{box-shadow:var(--shadow-md);border-color:var(--accent)}
.contact-info-card .icon{
  width:48px;height:48px;background:var(--surface-alt);border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:var(--accent);flex-shrink:0;
}
.contact-info-card h4{font-size:.95rem;font-weight:600;margin-bottom:4px;color:var(--primary-dark)}
.contact-info-card p,.contact-info-card a{font-size:.9rem;color:var(--text-light)}
.contact-info-card a:hover{color:var(--accent)}

.contact-form{
  background:var(--card);padding:40px;border-radius:var(--radius-md);
  border:1px solid var(--border);box-shadow:var(--shadow-sm);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:0}
.form-group.full{grid-column:1/-1}
.form-group label{display:block;font-size:.85rem;font-weight:600;color:var(--primary-dark);margin-bottom:8px}
.form-group input,.form-group textarea,.form-group select{
  width:100%;padding:13px 18px;border:1.5px solid var(--border);border-radius:var(--radius-sm);
  font-size:.92rem;transition:all var(--transition);background:var(--surface);
}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{
  border-color:var(--accent);box-shadow:0 0 0 3px rgba(212,168,83,.15);background:#fff;
}
.form-group textarea{resize:vertical;min-height:120px}

/* ---------- Map ---------- */
.map-wrapper{
  border-radius:var(--radius-lg);overflow:hidden;height:400px;
  border:1px solid var(--border);margin-top:48px;
}
.map-wrapper iframe{width:100%;height:100%;border:0}

/* ---------- Footer ---------- */
.footer{background:var(--primary-dark);color:rgba(255,255,255,.8);padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo-text{color:#fff;font-size:1.3rem}
.footer-brand .logo-text span{color:rgba(255,255,255,.5)}
.footer-brand p{margin-top:16px;font-size:.9rem;line-height:1.8;color:rgba(255,255,255,.6)}
.footer h4{font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:20px;color:var(--accent)}
.footer ul li{margin-bottom:10px}
.footer ul li a{font-size:.9rem;color:rgba(255,255,255,.6);transition:all var(--transition)}
.footer ul li a:hover{color:var(--accent);padding-left:4px}
.footer-contact-item{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:.88rem;color:rgba(255,255,255,.6)}
.footer-contact-item .icon{color:var(--accent);font-size:1rem}
.footer-bottom{
  margin-top:60px;padding:24px 0;border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;
  font-size:.82rem;color:rgba(255,255,255,.4);
}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.15);
  display:flex;align-items:center;justify-content:center;font-size:.9rem;
  color:rgba(255,255,255,.5);transition:all var(--transition);
}
.footer-social a:hover{background:var(--accent);border-color:var(--accent);color:var(--primary-dark)}

/* ---------- Page Header ---------- */
.page-header{
  padding:160px 0 80px;background:linear-gradient(135deg,var(--primary-dark),var(--primary));
  position:relative;overflow:hidden;text-align:center;color:#fff;
}
.page-header::before{
  content:'';position:absolute;inset:0;
  background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><circle cx="100" cy="100" r="80" fill="none" stroke="rgba(212,168,83,.05)" stroke-width="1"/></svg>') repeat;
  background-size:200px;
}
.page-header h1{font-family:var(--font-heading);font-size:clamp(2rem,4vw,3rem);font-weight:700;margin-bottom:16px;position:relative}
.breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;font-size:.88rem;color:rgba(255,255,255,.6);position:relative}
.breadcrumb a{color:var(--accent)}
.breadcrumb a:hover{color:var(--accent-light)}

/* ---------- Detail Content ---------- */
.detail-content{max-width:860px;margin:0 auto}
.detail-content h2{font-family:var(--font-heading);font-size:1.6rem;font-weight:700;color:var(--primary-dark);margin:32px 0 16px}
.detail-content p{font-size:1rem;line-height:1.9;color:var(--text-light);margin-bottom:20px}
.detail-content ul{margin:16px 0 24px 20px}
.detail-content ul li{position:relative;padding-left:20px;margin-bottom:10px;font-size:.95rem;color:var(--text-light)}
.detail-content ul li::before{content:'';position:absolute;left:0;top:10px;width:8px;height:8px;background:var(--accent);border-radius:50%}
.detail-img{border-radius:var(--radius-lg);overflow:hidden;margin:32px 0}
.detail-img img{width:100%;height:400px;object-fit:cover}

/* ---------- Animations ---------- */
.reveal{opacity:0;transform:translateY(30px);transition:all .8s cubic-bezier(.4,0,.2,1)}
.reveal.active{opacity:1;transform:translateY(0)}
.reveal-left{opacity:0;transform:translateX(-40px);transition:all .8s cubic-bezier(.4,0,.2,1)}
.reveal-left.active{opacity:1;transform:translateX(0)}
.reveal-right{opacity:0;transform:translateX(40px);transition:all .8s cubic-bezier(.4,0,.2,1)}
.reveal-right.active{opacity:1;transform:translateX(0)}

/* ---------- WhatsApp Float ---------- */
.whatsapp-float{
  position:fixed;bottom:24px;right:24px;z-index:999;
  width:56px;height:56px;background:#25d366;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 20px rgba(37,211,102,.4);
  transition:all var(--transition);animation:float 3s ease-in-out infinite;
}
.whatsapp-float:hover{transform:scale(1.1);box-shadow:0 6px 30px rgba(37,211,102,.5)}
.whatsapp-float svg{width:28px;height:28px;fill:#fff}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
  .hero-visual{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .section{padding:70px 0}
  .nav{
    position:fixed;top:0;right:-100%;width:280px;height:100vh;
    background:#fff;flex-direction:column;padding:100px 32px 32px;
    box-shadow:var(--shadow-xl);transition:right var(--transition);
    align-items:flex-start;gap:4px;
  }
  .nav.open{right:0}
  .nav a{width:100%;padding:12px 16px}
  .nav .btn{margin-left:0;width:100%;justify-content:center}
  .hamburger{display:flex}
  .hero h1{font-size:2rem}
  .hero-stats{grid-template-columns:repeat(3,1fr);gap:12px}
  .hero-stat{padding:16px 12px}
  .hero-stat .number{font-size:1.4rem}
  .services-grid{grid-template-columns:1fr}
  .about-features{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;text-align:center}
  .nav-item .dropdown{position:static;box-shadow:none;border:none;padding-left:16px;opacity:1;visibility:visible;transform:none}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero{min-height:auto;padding:140px 0 80px}
  .hero-stats{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:16px;text-align:center}
}