*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:"Segoe UI",Arial,sans-serif;
}

html{
    scroll-behavior:smooth;
}

body{
    background:#080808;
    color:white;
    overflow-x:hidden;
}


/* Menü */

header{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    padding:20px 8%;
    display:flex;
    justify-content:space-between;
    align-items:center;
    background:rgba(0,0,0,0.65);
    backdrop-filter:blur(15px);
    z-index:1000;
}


.logo{
    font-size:32px;
    font-weight:bold;
    color:#38b6ff;
}


nav a{
    color:white;
    text-decoration:none;
    margin-left:30px;
    font-size:18px;
    transition:.3s;
}


nav a:hover{
    color:#38b6ff;
}



/* Ana bölüm */

.hero{

    min-height:100vh;

    display:flex;
    justify-content:center;
    align-items:center;
    flex-direction:column;

    text-align:center;

    padding:50px;

    background:
    linear-gradient(
    rgba(0,0,0,.55),
    rgba(0,0,0,.85)
    ),
    url("background.jpg");

    background-size:cover;
    background-position:center;

}



.hero h1{

    font-size:75px;
    margin-bottom:20px;

}


.hero p{

    font-size:24px;
    max-width:900px;
    line-height:1.7;

}



/* Butonlar */

.buttons{

    margin-top:40px;

}


.btn{

    display:inline-block;

    padding:16px 40px;

    margin:10px;

    border-radius:12px;

    background:#0078ff;

    color:white;

    text-decoration:none;

    font-size:18px;

    transition:.3s;

}



.btn:hover{

    transform:translateY(-5px);

    background:#1991ff;

}



.btn2{

    background:#222;

}


.btn2:hover{

    background:#333;

}



/* Bölümler */


section{

    padding:120px 8%;

}



.title{

    font-size:45px;

    margin-bottom:50px;

}



/* Kartlar */


.cards{

    display:grid;

    grid-template-columns:
    repeat(auto-fit,minmax(260px,1fr));

    gap:30px;

}



.card{

    background:#151515;

    padding:35px;

    border-radius:20px;

    border:1px solid #222;

    transition:.4s;

}



.card:hover{

    transform:translateY(-10px);

    border-color:#38b6ff;

}



.card h2{

    color:#38b6ff;

    margin-bottom:15px;

}



/* İndirme */

.download{

    text-align:center;

    background:#101010;

}



.download h2{

    font-size:50px;

}



.download p{

    font-size:22px;

    margin:25px;

}



/* Footer */


footer{

    background:#050505;

    padding:40px;

    text-align:center;

    color:#aaa;

}



/* Telefon uyumu */


@media(max-width:900px){


header{

    flex-direction:column;

}


nav{

    margin-top:20px;

}


nav a{

    margin:10px;

}


.hero h1{

    font-size:45px;

}


.hero p{

    font-size:18px;

}


}