:root{
  --ink:#0b1220;
  --muted: rgba(0,0,0,.60);
  --line: rgba(0,0,0,.10);
  --accent:#e53935;
  --shadow: 0 18px 55px rgba(0,0,0,.10);
  --radius:18px;
  --max:1180px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color: var(--ink);
  background:#fff;
  overflow-x:hidden;
}

a{ color:inherit; text-decoration:none; }
img{ display:block; max-width:100%; }

.container{
  width:min(var(--max), calc(100% - 48px));
  margin:0 auto;
}

/* HEADER */
.header{
  position:sticky;
  top:0;
  z-index:50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
}

.nav{
  height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}

.brand img{ height:34px; width:auto; }

.navlinks{
  display:flex;
  gap:18px;
}
.navlinks a{
  font-weight:800;
  font-size:14px;
  padding:10px 12px;
  border-radius:12px;
  color: rgba(0,0,0,.72);
}
.navlinks a:hover{
  background: rgba(0,0,0,.04);
}

/* BUTTONS */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  font-weight:900;
  font-size:14px;
  box-shadow: 0 10px 26px rgba(0,0,0,.08);
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover{
  transform: translateY(-1px);
  box-shadow: 0 14px 34px rgba(0,0,0,.12);
}
.btn-accent{
  background: var(--accent);
  color:#fff;
  border-color: transparent;
  box-shadow: 0 14px 34px rgba(229,57,53,.22);
}
.btn-accent:hover{
  background:#ff4b47;
}

/* HERO */
.hero{
  position:relative;
  height: calc(100vh - 76px);   /* header çıkınca tam ekran */
  min-height: 680px;
  display:flex;
  align-items:center;
  overflow:hidden;
  padding-bottom: 86px;         /* alttaki logo barına yer */
}

/* Slider */
.hero-slider{ position:absolute; inset:0; z-index:0; }
.hero-slide{
  position:absolute; inset:0;
  background-position:center;
  background-size:cover;
  opacity:0;
  transform: scale(1.04);
  transition: opacity .7s ease, transform 1.2s ease;
}
.hero-slide.is-active{
  opacity:1;
  transform: scale(1);
}

/* White overlay */.hero-overlay{
  position:absolute; inset:0;
  z-index:1;
  background: linear-gradient(
    180deg,
    rgba(255,255,255,.35),
    rgba(255,255,255,.70)
  );
}

/* content */
.hero-content{
  position:relative;
  z-index:2;
  max-width:600px;
}
.hero h1{
  font-size: 52px;
  margin:0 0 10px;
  letter-spacing: -0.02em;
}
.hero p{
  margin:0 0 18px;
  color: var(--muted);
  line-height:1.7;
}
.hero-actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

/* arrows */
.hero-arrow{
  position:absolute;
  top:50%;
  transform: translateY(-50%);
  z-index:3;
  width:44px;
  height:44px;
  border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.88);
  box-shadow: 0 14px 30px rgba(0,0,0,.12);
  cursor:pointer;
  font-size: 26px;
  line-height: 40px;
  text-align:center;
  color:#111;
  user-select:none;
  transition: transform .15s ease, background .15s ease;
}
.hero-arrow:hover{
  transform: translateY(-50%) scale(1.04);
  background: rgba(255,255,255,.95);
}
.hero-arrow.left{ left:18px; }
.hero-arrow.right{ right:18px; }

/* brand bar */
.hero-brands{
  position:absolute;
  bottom:0;
  width:100%;
  z-index:2;
  background: rgba(255,255,255,.96);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.brands-track{
  display:flex;
  gap:30px;
  padding:10px 0;
  width:max-content;
  animation: scroll 22s linear infinite;
}
.brands-track img{
  height:22px;
  opacity:.82;
  filter: grayscale(1);
}
@keyframes scroll{
  from{ transform:translateX(0); }
  to{ transform:translateX(-50%); }
}

/* SECTION */
.section{
  padding: 46px 0 30px;
}

.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:16px;
}

.card{
  border:1px solid var(--line);
  border-radius: var(--radius);
  background:#fff;
  box-shadow: var(--shadow);
  padding: 18px;
}
.card h3{
  margin:0 0 8px;
}
.card p{
  margin:0;
  color: var(--muted);
  line-height:1.6;
}
.card-actions{ margin-top:14px; }

/* FOOTER */
.footer{
  border-top:1px solid var(--line);
  padding: 40px 0 0;
  margin-top: 20px;
  background:#fff;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap:22px;
  padding-bottom: 26px;
}
.footer-logo{ height:34px; width:auto; margin-bottom:10px; }

.footer h4{
  margin:0 0 10px;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(0,0,0,.72);
}

.footer-links{
  display:grid;
  gap:8px;
}
.footer-links a{
  color: rgba(0,0,0,.62);
  font-weight:700;
}
.footer-links a:hover{
  text-decoration: underline;
}

.footer p{ color: rgba(0,0,0,.62); margin: 0 0 8px; }

.footer-bottom{
  border-top:1px solid var(--line);
  padding: 14px 0;
  text-align:center;
  color: rgba(0,0,0,.55);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 980px){
  .grid-3{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .hero h1{ font-size: 40px; }
}

@media (max-width: 860px){
  .navlinks{ display:none; }
}

.hero-content{
  position:absolute;
  left:0; right:0;
  bottom: 110px; /* logo barının üstüne otursun */
  z-index:2;
}

.hero-box{
  width: min(560px, 92vw);
  border:1px solid rgba(0,0,0,.10);
  background: rgba(255,255,255,.90);
  backdrop-filter: blur(10px);
  border-radius: 18px;
  box-shadow: 0 20px 60px rgba(0,0,0,.18);
  padding: 18px 18px 16px;
}

.hero-box h1{
  margin:0 0 8px;
  font-size: 44px;
  letter-spacing:-0.02em;
}
.hero-box p{
  margin:0 0 14px;
  color: rgba(0,0,0,.62);
  line-height:1.6;
}