:root{
  --marine:#38bdf8;
  --industrial:#22c55e;
  --dark:#0b1220;
  --white:#fff;
}

*{margin:0;padding:0;box-sizing:border-box}
body{
  font-family:'Poppins',sans-serif;
  background:#000;
  overflow:hidden;
}

/* ÜST LOGO */
.topbar{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  padding:18px 5%;
  z-index:50;
  display:flex;
  justify-content:center;
}

.top-logo{
  width:130px;
  filter:drop-shadow(0 0 12px rgba(0,0,0,0.8));
  animation: logoFloat 3.2s ease-in-out infinite;
}

@keyframes logoFloat{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-8px)}
}

/* ARKAPLAN ANİMASYON */
.bg-anim{
  position:fixed;
  inset:0;
  background: radial-gradient(circle at 20% 20%, rgba(56,189,248,0.12), transparent 45%),
              radial-gradient(circle at 80% 70%, rgba(34,197,94,0.12), transparent 45%);
  animation: bgMove 10s linear infinite;
  z-index:1;
}

@keyframes bgMove{
  0%{filter:hue-rotate(0deg)}
  100%{filter:hue-rotate(35deg)}
}

/* 2 PARÇA */
.split{
  display:flex;
  width:100%;
  height:100vh;
  position:relative;
  z-index:5;
}

/* PANEL */
.panel{
  flex:1;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  overflow:hidden;
  transition: all 0.6s ease;
}

/* RESİMLER */
.panel.marine{
  background:url("assets/marine-bg.jpg") center/cover no-repeat;
}
.panel.industrial{
  background:url("assets/industrial-bg.jpg") center/cover no-repeat;
}

/* Karanlık overlay */
.overlay{
  position:absolute;
  inset:0;
  background:rgba(0,0,0,0.55);
  transition:0.5s;
}

/* İçerik */
.content{
  position:relative;
  text-align:center;
  padding:30px;
  color:white;
  max-width:500px;
  z-index:3;
}

.content h1{
  font-size:2.6rem;
  letter-spacing:2px;
  text-transform:uppercase;
  text-shadow:0 0 14px rgba(0,0,0,0.9);
  margin-bottom:12px;
}

.content p{
  font-size:1.05rem;
  opacity:0.92;
  margin-bottom:20px;
}

/* Buton */
.btn{
  padding:12px 22px;
  border:none;
  border-radius:12px;
  font-weight:700;
  cursor:pointer;
  font-size:1rem;
  box-shadow:0 10px 30px rgba(0,0,0,0.35);
  transition:0.35s;
}

.btn.blue{background:var(--marine); color:#001b2d;}
.btn.green{background:var(--industrial); color:#05230f;}

.btn:hover{
  transform:translateY(-4px) scale(1.02);
}

/* Hover efekti */
.panel:hover{
  flex:1.15;
}

.panel:hover .overlay{
  background:rgba(0,0,0,0.35);
}

/* Mobil */
@media(max-width:900px){
  body{overflow:auto}
  .split{flex-direction:column}
  .panel{height:50vh}
  .content h1{font-size:2rem}
}