:root{
  --bg: #ffffff;          
  --fg: #1a1a1a;          
  --muted: #555555;       
  --card-bg: #f7f9fc;     
  --card-border: #dcdcdc; 
  --accent: #0d3b66;      
  --accent2: #145da0;     
  --gold: #d4af37;
  --shadow: 0 12px 30px rgba(0,0,0,.15);
  --radius:16px;
}

/* Temel stiller */
*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: 'Inter', sans-serif;
  background:var(--bg);
  color:var(--fg);
  line-height:1.55;
}

h1, h2, h3{ font-family: 'Inter', sans-serif; letter-spacing:.3px; }
a{ color:inherit; text-decoration:none; }
.container{ width:min(1100px, calc(100% - 40px)); margin:0 auto; }

/* Topbar */
.topbar{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(255,255,255,0.7); 
  border-bottom: 1px solid rgba(0,0,0,.08);
  backdrop-filter: blur(10px);
}
.topbar__inner{ display:flex; align-items:center; justify-content:space-between; height:76px; gap:16px; }
.brand__logo{ height:120px; width:auto; display:block; }
.nav{ display:flex; gap:22px; align-items:center; }
.nav a{ font-weight:600; color: rgba(26,26,26,.9); padding:10px 8px; border-radius:10px; }

.nav__toggle{
  display:none;
  width:44px; height:44px;
  border:1px solid rgba(0,0,0,.14);
  background: rgba(245,245,245,.9);
  border-radius:12px;
  box-shadow: var(--shadow);
  cursor:pointer;
}
.nav__toggle span{ display:block; height:2px; width:20px; background: rgba(26,26,26,.9); margin:5px auto; border-radius:2px; }

/* Hero */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  overflow:hidden;
  padding-top:76px; 
}
.hero__video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  transform: scale(1.02);
}
.hero__overlay{
  position:absolute;
  inset:0;
  background: linear-gradient(rgba(0,30,60,0.3), rgba(0,30,60,0.4));
  pointer-events: none;
  z-index:1;
}
.hero__content{
  position:relative;
  z-index:2;
  padding:68px 0 80px;
}
.hero h1{
  font-size: clamp(34px, 5vw, 56px);
  letter-spacing:.2px;
  margin:0 0 10px;
  color: #ffffff; 
}
.hero p {
  margin: 0 0 22px;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 600;
  color: #ffffff; 
}
.hero__cta{ display:flex; gap:12px; flex-wrap:wrap; margin-top: 8px; }

/* Butonlar */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:14px;
  border:1px solid transparent;
  font-weight:700;
  letter-spacing:.2px;
  cursor:pointer;
  user-select:none;
}
.btn--primary{
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color:white;
  box-shadow: 0 6px 20px rgba(13,59,102,.3);
}
.btn--ghost{
  background: rgba(13,59,102,.05);
  border-color: rgba(13,59,102,.2);
  color: var(--accent);
}

/* Sections */
.section{ padding:72px 0; border-top:1px solid rgba(0,0,0,.03); }
.section--alt{ background: rgba(245,245,245,.3); }
h2{ font-size: 30px; margin:0 0 10px; }
.lead{ margin:0 0 26px; color: var(--muted); }
.muted{ color: var(--muted); }

/* Grid ve kartlar */
.grid{ display:grid; grid-template-columns: 1.15fr .85fr; gap:24px; align-items:start; }
.cards{ display:grid; grid-template-columns: repeat(3, 1fr); gap:18px; margin-top: 18px; }
.card{
  background: var(--card-bg);
  border:1px solid var(--card-border);
  border-radius: var(--radius);
  padding:18px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.card h3{ margin:0 0 8px; }
.card p{ margin:0; color: var(--muted); }

/* Contact - form ve bilgiler */
#contact {
  position: relative;
  z-index: 2;
  padding-top: 100px;
}

.contact-info {
  display: grid;
  gap: 10px;
  font-weight: 600;
  color: var(--fg);
}

/* Contact / Form Stilleri */
.contact-form {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

.contact-form label {
  display: block;
  font-weight: 700;
  margin-bottom: 12px;
  color: rgba(26,26,26,0.85);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 8px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 12px;
  padding: 12px;
  color: rgba(26,26,26,0.9);
  outline: none;
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(102,209,255,.55);
  box-shadow: 0 0 0 3px rgba(102,209,255,.14);
}

.contact-form button {
  max-width: 160px;
  padding: 12px 18px;
  border-radius: 12px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}

/* Footer */
.footer{ padding:26px 0; border-top:1px solid rgba(0,0,0,.05); color: var(--muted); }
.footer__inner{ display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.footer__links{ display:flex; gap:14px; }

/* --- FLEET / PROCESS SLIDER (ENTEGRE) --- */
.fleet-slider {
  position: relative;
  margin-top: 30px;
  overflow: hidden;
}
.fleet-track {
  display: flex;
  gap: 20px;
  transition: transform .4s ease;
  cursor: grab;
}
.fleet-card {
  flex: 0 0 auto;
  min-width: 320px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.fleet-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.fleet-card h3 { margin:14px 16px 6px; }
.fleet-card p { margin:0 16px 18px; color: var(--muted); }
.fleet-btn {
  position: absolute;
  top: 40%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,.2);
  background: rgba(0,0,0,.2);
  color: white;
  font-size: 22px;
  cursor: pointer;
  z-index: 5;
}
.fleet-prev { left:-10px; }
.fleet-next { right:-10px; }

/* Headings accent line */
.section h2{
  position: relative;
  display:inline-block;
  padding-bottom:8px;
}
.section h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:40%;
  height:2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

/* Responsive */
@media (max-width: 900px){ .cards{ grid-template-columns: 1fr; } .grid{ grid-template-columns: 1fr; } }
@media (max-width: 720px){
  .nav{ display:none; }
  .nav__toggle{ display:inline-block; }
  .nav.is-open{
    display:flex;
    position:absolute;
    top:76px;
    right:20px;
    flex-direction:column;
    align-items:stretch;
    background: rgba(255,255,255,.95);
    border:1px solid rgba(0,0,0,.1);
    border-radius: 16px;
    padding:10px;
    width: min(240px, calc(100% - 40px));
  }
  .brand__logo{ height:90px; }
}